10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_______________________________________________________________________

 FORM 10-Q

_______________________________________________________________________

☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended June 30, 2024

or

☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from _______ to _______

Commission File Number 001-38694

__________________________________________________________________________

ARCADIUM LITHIUM PLC

(Exact name of registrant as specified in its charter)

__________________________________________________________________________ 

Bailiwick of Jersey	98-1737136
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1818 Market Street	Suite 12, Gateway Hub
Suite 2550	Shannon Airport House
Philadelphia, PA	Shannon, Co. Clare
United States	Ireland
19103	V14 E370
(Address of principal executive offices) (Zip Code)
215-299-5900	353-1-6875238
(Registrant’s telephone number, including area code)

__________________________________________________________________________

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Ordinary Shares, par value $1.00 per share	ALTM	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒   No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12B-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
			☐
			☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

As of August 7, 2024, there were 1,075,398,238 Ordinary Shares, $1.00 par value per share, outstanding.

ARCADIUM LITHIUM PLC

INDEX

	Page No.
Glossary of Terms	4
Part I - FINANCIAL INFORMATION	6
Item 1. Financial Statements	6
Condensed Consolidated Statements of Operations - Three and Six Months Ended June 30, 2024 and 2023 (unaudited)	6
Condensed Consolidated Statements of Comprehensive Income - Three and Six Months Ended June 30, 2024 and 2023 (unaudited)	7
Condensed Consolidated Balance Sheets - June 30, 2024 (unaudited) and December 31, 2023	8
Condensed Consolidated Statements of Cash Flows - Six Months Ended June 30, 2024 and 2023 (unaudited)	9
Condensed Consolidated Statements of Equity - Three and Six Months Ended June 30, 2024 and 2023 (unaudited)	11
Notes to the Condensed Consolidated Financial Statements (unaudited)	12
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	41
Item 3. Quantitative and Qualitative Disclosures About Market Risk	55
Item 4. Controls and Procedures	55
Part II - OTHER INFORMATION	56
Item 1. Legal Proceedings	56
Item 1A. Risk Factors	56
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	56
Item 3. Defaults Upon Senior Securities	57
Item 4. Mine Safety Disclosures	57
Item 5. Other Information	57
Item 6. Exhibits	57
Signatures	58

3

Glossary of Terms

When the following terms and abbreviations appear in the text of this report, they have the meanings indicated below:

2025 Notes	$245.75 million principal amount of 4.125% Convertible Senior Notes due July 2025
Allkem	Allkem Pty Ltd, a proprietary company limited by shares incorporated in Australia and a wholly owned subsidiary of Arcadium beginning in 2024, previously known as Allkem Limited, a public company limited by shares and converted from a public to a proprietary limited company on March 6, 2024.
Allkem Livent Merger	The combination of Livent and Allkem in a stock-for-stock transaction pursuant to the Transaction Agreement. The transaction closed on January 4, 2024.
AOCL	Accumulated other comprehensive loss
Acquisition Date	January 4, 2024, the date the Allkem Livent Merger transaction closed
Arcadium or Arcadium Lithium	Arcadium Lithium plc, previously known as Allkem Livent plc, a public limited company incorporated under the laws of the Bailiwick of Jersey (originally incorporated as Lightning-A Limited, a private limited company incorporated under the laws of the Bailiwick of Jersey), the registrant.
Arcadium NQSP	Arcadium Non-Qualified Savings Plan
Arcadium Plan	Arcadium Lithium plc Omnibus Incentive Plan
ARO	Asset Retirement Obligation
ASC 321	Accounting Standards Codification Topic 321 - Investments - Equity Securities
ASC 842	Accounting Standards Codification Topic 842 - Leases
CCAA	The Companies’ Creditors Arrangement Act
CRA	Canada Revenue Agency
Credit Agreement	As amended, provides for a $500 million senior secured revolving credit facility
E&E	Exploration and evaluation
EAETR	Estimated annual effective tax rate
ESM	ESM ILiAD, LLC, parent of ILiAD Technologies, LLC, both subsidiaries of EnergySource Materials, LLC
EV	Electric vehicle
Exchange Act	Securities and Exchange Act of 1934, as amended
Exchange Ratio	Pursuant to the Transaction Agreement, each share of Livent common stock, par value $0.001 per share, was converted into the right to receive 2.406 Arcadium Lithium ordinary shares
FMC	FMC Corporation
ILiAD	Integrated Lithium Adsorption Desorption
IQ	Investissement Québec, a company established by the Government of Québec to favor investment in Québec by Québec-based and international companies
IRA	Inflation Reduction Act of 2022
JEMSE	Jujuy Energia Minera Sociedad del Estado, which owns 8.5% of SDJ SA
Livent	Livent Corporation, a Delaware corporation, a wholly owned subsidiary of Arcadium beginning in 2024 and Arcadium's predecessor
MdA	Minera del Altiplano SA, the local operating subsidiary in Argentina for the Fénix operations
MdA Holdings LLC	MdA Lithium Holdings LLC, a Delaware Limited Liability Company and wholly owned subsidiary of Arcadium, which owns 94.9% of MdA
Merger Sub	Lightning-A Merger Sub, Inc., a Delaware corporation
Naraha Plant	Our lithium hydroxide manufacturing plant in Naraha, Japan, in which we have a 49% ownership interest and 75% economic interest through our investment in TLC, an unconsolidated affiliate accounted for under the equity method of accounting.
Nemaska Lithium or NLI	Nemaska Lithium Inc., a non-public lithium company not yet in the production stage domiciled in Québec, Canada
Nemaska Lithium Project	Through our subsidiary, QLP, in which we own a 50% equity interest in NLI, we are developing the Nemaska Lithium Project, which will consist of the Whabouchi Mine and concentrator in the James Bay region of Québec and a lithium hydroxide conversion plant in Bécancour, Québec.
Olaroz Plant	Our lithium extraction and manufacturing plant in Jujuy, Argentina, in which we own a 66.5% indirect equity interest through our subsidiaries SDJ Pte and SDJ SA

4

PRSU	Performance-based restricted share unit
QLP	Québec Lithium Partners (UK) Limited, a wholly owned subsidiary of Arcadium, which owns a 50% equity interest in the Nemaska Lithium Project.
Revolving Credit Facility	Arcadium's $500 million senior secured revolving credit facility, as provided by the Credit Agreement
RSU	Restricted share unit
RVO	Approval and Vesting Order
SDJ Pte	Sales de Jujuy Pte Ltd, Allkem's 72.68% owned subsidiary in Singapore which owns 91.5% of SDJ SA.
SDJ SA	Sales de Jujuy S.A., Allkem's 66.5% indirectly owned operating subsidiary in Argentina which operates the Olaroz Plant
SDV SA	Galaxy Lithium (SAL DE VIDA) S.A., Allkem's 100% indirectly owned subsidiary in Argentina which is developing a lithium extraction and manufacturing facility in the Salar del Hombre Muerto, the Sal de Vida Project.
SEC	Securities and Exchange Commission
Securities Act	Securities Act of 1933, as amended
SOFR	Secured Overnight Financing Rate
Transaction Agreement	Transaction Agreement entered into on May 10, 2023 (as amended on August 2, 2023, November 5, 2023 and December 20, 2023), by and among Livent, Allkem, Arcadium, Merger Sub and Arcadium Lithium Intermediate IRL Limited, a private company limited by shares and incorporated and registered in Ireland, providing for the Allkem Livent Merger
TLC	Toyotsu Lithium Corporation
TLP	Toyotsu Lithium Pte Ltd, a subsidiary of TTC with a 27.32% ownership in SDJ Pte
TTC	Toyota Tsusho Corporation
U.S. GAAP	United States Generally Accepted Accounting Principles
VAT	Value-added tax

5

PART I - FINANCIAL INFORMATION

ITEM 1.    FINANCIAL STATEMENTS

In this Quarterly Report on Form 10-Q ("Form 10-Q"), the results of the Company as of and for the three and six months ended June 30, 2024 include the operations and financial position of Allkem. Because Arcadium Lithium plc is the successor company to Livent in the Allkem Livent Merger which closed on January 4, 2024, we are presenting the results of predecessor Livent’s operations for the three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem. Refer to Note 4 for further information related to the Allkem Livent Merger.

ARCADIUM LITHIUM PLC

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023 (1)		2024		2023 (1)
(in Millions, Except Per Share Data)	(unaudited)
Revenue	$	254.5	$	235.8	$	515.7	$	489.3
Cost of sales	174.1		88.5		328.9		174.8
Gross margin	80.4		147.3		186.8		314.5
Selling, general and administrative expenses	15.5		17.6		55.4		33.9
Research and development expenses	1.5		1.0		2.6		2.0
Restructuring and other charges	21.9		24.3		101.7		26.3
Total costs and expenses	213.0		131.4		488.6		237.0
Income from operations before equity in net loss of unconsolidated affiliate, interest income, net, loss on debt extinguishment and other gains	41.5		104.4		27.1		252.3
Equity in net loss of unconsolidated affiliate	—		7.2		—		15.3
Interest income, net	(9.3)		—		(20.3)		—
Loss on debt extinguishment	0.9		—		1.1		—
Other gains	(79.9)		(7.6)		(157.2)		(6.5)
Income from operations before income taxes	129.8		104.8		203.5		243.5
Income tax expense	35.3		14.6		89.1		38.5
Net income	94.5		90.2		114.4		205.0
Net income attributable to noncontrolling interests	8.8		—		13.1		—
Net income attributable to Arcadium Lithium plc	$	85.7	$	90.2	$	101.3	$	205.0
Basic earnings per ordinary share	$	0.08	$	0.21	$	0.10	$	0.47
Diluted earnings per ordinary share	$	0.07	$	0.18	$	0.09	$	0.41
Weighted average ordinary shares outstanding - basic	1,074.9		432.3		1,064.2		432.2
Weighted average ordinary shares outstanding - diluted	1,143.5		503.9		1,132.9		503.7

_______________________________

1.For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

The accompanying notes are an integral part of these condensed consolidated financial statements.

6

ARCADIUM LITHIUM PLC

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023 (1)		2024		2023 (1)
(in Millions)	(unaudited)
Net income	$	94.5	$	90.2	$	114.4	$	205.0
Other comprehensive (loss)/income, net of tax:
Foreign currency adjustments:
Foreign currency translation (loss)/income arising during the period	(10.3)		(1.0)		(30.5)		0.5
Total foreign currency translation adjustments	(10.3)		(1.0)		(30.5)		0.5
Derivative instruments:
Unrealized hedging gains, net of tax of less than zero, $(0.1), $(0.1), and $(0.2)	0.1		0.4		0.3		0.6
Total derivative instruments	0.1		0.4		0.3		0.6
Other comprehensive (loss)/income, net of tax	(10.2)		(0.6)		(30.2)		1.1
Comprehensive income	84.3		89.6		84.2		206.1
Comprehensive income attributable to noncontrolling interests	8.8		—		13.1		—
Comprehensive income attributable to Arcadium Lithium plc	$	75.5	$	89.6	$	71.1	$	206.1

______________________

1.Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023, which do not include the operations of Allkem.

The accompanying notes are an integral part of these condensed consolidated financial statements.

7

ARCADIUM LITHIUM PLC

CONDENSED CONSOLIDATED BALANCE SHEETS

(in Millions, Except Share and Par Value Data)	June 30, 2024		December 31, 2023 (1)
ASSETS	(unaudited)
Current assets
Cash and cash equivalents	$	380.4	$	237.6
Trade receivables, net of allowance of approximately $0.1 in 2024 and $0.3 in 2023	94.1		106.7
Inventories, net	333.1		217.5
Prepaid and other current assets	264.0		86.4
Total current assets	1,071.6		648.2
Investments	38.2		34.8
Property, plant and equipment, net of accumulated depreciation of $307.8 in 2024 and $269.1 in 2023	7,034.9		2,237.1
Goodwill	1,300.3		120.7
Other intangibles, net	56.6		53.4
Deferred income taxes	32.7		1.4
Right of use assets - operating leases, net	53.7		6.8
Other assets	342.3		127.7
Total assets	$	9,930.3	$	3,230.1
LIABILITIES AND EQUITY
Current liabilities
Short-term debt and current portion of long-term debt	$	43.4	$	2.4
Accounts payable, trade and other	146.8		115.4
Accrued and other liabilities	159.8		136.8
Contract liability - short-term	37.1		4.4
Operating lease liabilities - current	8.4		1.3
Income taxes	78.3		8.3
Total current liabilities	473.8		268.6
Long-term debt	590.6		299.6
Operating lease liabilities - long-term	45.6		5.6
Environmental liabilities	7.4		7.0
Deferred income taxes	1,380.1		126.4
Contract liability - long-term	253.8		217.8
Other long-term liabilities	89.4		21.3
Commitments and contingent liabilities (Note 20)	—		—
Total current and long-term liabilities	2,840.7		946.3
Equity
Arcadium Lithium plc shareholders' equity:
Ordinary shares; $1.00 par value; 5,000,000,000 shares authorized; 1,075,210,958 and 433,059,946 shares issued; 1,074,948,055 and 432,796,277 outstanding as of June 30, 2024 and December 31, 2023, respectively	0.1		0.1
Capital in excess of par value of ordinary shares	5,577.9		1,170.4
Retained earnings	765.8		664.5
Accumulated other comprehensive loss	(80.0)		(49.8)
Treasury shares, ordinary, at cost; 262,903 and 263,669 shares as of June 30, 2024 and December 31, 2023, respectively	(1.0)		(1.0)
Total Arcadium Lithium plc shareholders’ equity	6,262.8		1,784.2
Noncontrolling interests	826.8		499.6
Total equity	7,089.6		2,283.8
Total liabilities and equity	$	9,930.3	$	3,230.1

_________________________

1.Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

The accompanying notes are an integral part of these condensed consolidated financial statements.

8

ARCADIUM LITHIUM PLC

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

	Six Months Ended June 30,
	2024		2023 (1)
(in Millions)	(unaudited)
Cash (used in)/provided by operating activities:
Net income	$	114.4	$	205.0
Adjustments to reconcile net income to cash (used in)/provided by operating activities:
Depreciation and amortization	48.4		13.8
Restructuring and other charges	(43.4)		15.7
Deferred income taxes	(66.6)		2.3
Share-based compensation	5.7		4.0
Change in investments in trust fund securities	(1.1)		0.8
Loss on debt extinguishment	1.1		—
Equity in net loss of unconsolidated affiliate	—		15.3
Other gain, Blue Chip Swap	(50.5)		(11.4)
Other non-cash adjustments	3.0		(0.4)
Changes in operating assets and liabilities:
Trade receivables, net	77.1		19.0
Inventories	4.2		(46.7)
Accounts payable, trade and other	(149.7)		(17.0)
Changes in deferred compensation	1.6		1.1
Contract liability - short-term	32.7		(13.2)
Contract liability - long-term	(16.5)		—
Income taxes	(8.3)		(9.8)
Change in prepaid and other current assets and other assets	(125.7)		6.1
Change in accrued and other current liabilities and other long-term liabilities	53.9		(3.0)
Cash (used in)/provided by operating activities	(119.7)		181.6
Cash provided by/(used in) investing activities:
Capital expenditures(2)	(539.7)		(157.8)
Investments in Arcadium NQSP securities	(1.1)		(0.8)
Proceeds from Blue Chip Swap, net of purchases	50.5		11.4
Acquired cash & cash equivalents - Allkem Livent Merger	681.4		—
Investments in unconsolidated affiliates (3)	(27.0)		(29.5)
Other investing activities	(5.7)		(3.5)
Cash provided by/(used in) investing activities	158.4		(180.2)
Cash provided by/(used in) financing activities:
Proceeds from Revolving Credit Facility	123.0		—
Repayments of Revolving Credit Facility	(123.0)		—
Payments of financing fees	(4.4)		(0.3)
Proceeds from issuance of ordinary shares - incentive plans	—		0.4
Repayments of project loan facilities	(65.1)		—
Proceeds from prepayment of customer supply agreement	150.0		—
Capital contribution from noncontrolling interest - Nemaska Lithium	39.1		—
Payment of deposit to customs authorities	—		(21.7)
Cash provided by/(used in) financing activities	119.6		(21.6)
Effect of exchange rate changes on cash and cash equivalents	(15.5)		(1.0)
Increase/(decrease) in cash and cash equivalents	142.8		(21.2)
Cash and cash equivalents, beginning of period	237.6		189.0
Cash and cash equivalents, end of period	$	380.4	$	167.8

_________________________

1.Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

9

ARCADIUM LITHIUM PLC

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)

	Six Months Ended June 30,
	2024		2023 (1)
Supplemental Disclosure for Cash Flow:	(unaudited)
Cash payments for income taxes, net of refunds	$	98.9	$	41.4
Cash payments for interest (2)	11.1		5.8
Cash payments for Restructuring and other charges	145.1		10.4
Accrued capital expenditures	141.7		34.7
Accrued transaction costs - investment in unconsolidated affiliate	—		0.2
Operating lease right-of-use assets and lease liabilities recorded for ASC 842	—		1.2

____________________

1.Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

2.For the six months ended June 30, 2024 and 2023, $11.9 million and $8.4 million of interest expense was capitalized, respectively.

3.On October 18, 2023 we began consolidating Nemaska Lithium, see Note 9 for details.

The accompanying notes are an integral part of these condensed consolidated financial statements.

10

ARCADIUM LITHIUM PLC

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY

(UNAUDITED)

	Arcadium Shareholders' Equity
(in Millions Except Per Share Data)	Ordinary Shares, $1.00 Per Share Par Value		Capital In Excess of Par		Retained Earnings		Accumulated Other Comprehensive Loss		Treasury Shares		Non-controlling Interest		Total
Balance as of December 31, 2023	$	0.1	$	1,170.4	$	664.5	$	(49.8)	$	(1.0)	$	499.6	$	2,283.8
Net income	—		—		15.6		—		—		4.3		19.9
Allkem Livent Merger	—		4,390.4		—		—		—		275.0		4,665.4
Share compensation plans	—		15.8		—		—		—		—		15.8
Shares withheld for taxes and option costs - ordinary share issuances	—		(2.6)		—		—		—		—		(2.6)
Net hedging gains, net of income tax	—		—		—		0.2		—		—		0.2
Foreign currency translation adjustments	—		—		—		(20.2)		—		—		(20.2)
Balance as of March 31, 2024	$	0.1	$	5,574.0	$	680.1	$	(69.8)	$	(1.0)	$	778.9	$	6,962.3
Net income	—		—		85.7		—		—		8.8		94.5
Capital contribution from noncontrolling interest	—		—		—		—		—		39.1		39.1
Share compensation plans	—		3.9		—		—		—		—		3.9
Net hedging gains, net of income tax	—		—		—		0.1		—		—		0.1
Foreign currency translation adjustments	—		—		—		(10.3)		—		—		(10.3)
Balance as of June 30, 2024	$	0.1	$	5,577.9	$	765.8	$	(80.0)	$	(1.0)	$	826.8	$	7,089.6
	Arcadium Shareholders' Equity (1)
(in Millions Except Per Share Data)	Ordinary Shares, $1.00 Per Share Par Value		Capital In Excess of Par		Retained Earnings		Accumulated Other Comprehensive Loss		Treasury Shares		Non-controlling Interest		Total
Balance as of December 31, 2022	$	0.1	$	1,160.4	$	334.4	$	(51.0)	$	(0.9)	$	—	$	1,443.0
Net income	—		—		114.8		—		—		—		114.8
Share compensation plans	—		1.9		—		—		—		—		1.9
Shares withheld for taxes - ordinary share issuances	—		(0.5)		—		—		—		—		(0.5)
Exercise of stock options	—		0.1		—		—		—		—		0.1
Net hedging gains, net of income tax	—		—		—		0.2		—		—		0.2
Foreign currency translation adjustments	—		—		—		1.5		—		—		1.5
Balance as of March 31, 2023	$	0.1	$	1,161.9	$	449.2	$	(49.3)	$	(0.9)	$	—	$	1,561.0
Net income	—		—		90.2		—		—		—		90.2
Share compensation plans	—		2.1		—		—		—		—		2.1
Exercise of stock options	—		0.3		—		—		—		—		0.3
Net hedging gain, net of income tax	—		—		—		0.4		—		—		0.4
Foreign currency translation adjustments	—		—		—		(1.0)		—		—		(1.0)
Balance as of June 30, 2023	$	0.1	$	1,164.3	$	539.4	$	(49.9)	$	(0.9)	$	—	$	1,653.0

__________________________

1.Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem.

The accompanying notes are an integral part of these condensed consolidated financial statements.

11

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited)

Note 1: Description of the Business

Background and Nature of Operations

Arcadium Lithium plc ("Arcadium", "Arcadium Lithium", "we", "us", "Company" or "our") is a public limited company incorporated under the laws of the Bailiwick of Jersey. On January 4, 2024, Arcadium Lithium completed the previously announced Allkem Livent Merger by which Livent Corporation, a Delaware corporation ("Livent"), and Allkem Limited, an Australian company limited by shares ("Allkem"), became wholly owned subsidiaries of Arcadium Lithium. On January 4, 2024, the Company's shares started trading on the New York Stock Exchange under the trading symbol ALTM. See Note 4, Allkem Livent Merger for further details.

While Arcadium Lithium is a newly formed company from the merger of Allkem and Livent, our company has a rich heritage of innovation and a long, proven history of producing performance lithium compounds in a safe and sustainable manner. We are vertically integrated, with a global footprint and industry-leading end-to-end capabilities across lithium production including hard-rock mining, conventional pond-based brine extraction, direct lithium brine extraction and lithium chemicals manufacturing.

Our lithium asset portfolio, consisting of both operating assets and development projects, provides us with global reach, scale, and product flexibility. Today we have operating resources in Argentina and Australia and downstream conversion assets in the U.S., China, Japan, and the U.K. We also have multiple development stage projects in Argentina (greenfield and brownfield) and Canada (greenfield) that will in time allow us to increase production capabilities and meet the future needs of customers around the world. In the U.S., we operate the only integrated mine-to-metal production facility in the Western Hemisphere for high purity lithium metal, a core component of next generation battery technologies.

We manufacture a wide range of lithium products, including battery-grade lithium hydroxide, battery-grade lithium carbonate, spodumene, and other specialty chemicals such as butyllithium and high purity lithium metal. Our products are used in various performance applications, including lithium-based batteries, specialty polymers and pharmaceutical products and chemical synthesis applications.

Note 2: Significant Accounting Policies and Related Financial Information

In this Form 10-Q, the results of the Company as of June 30, 2024 and for the three and six months ended June 30, 2024 include the operations and financial position of Allkem, respectively. Because Arcadium Lithium plc is the successor company to Livent in the Allkem Livent Merger, we are presenting the results of predecessor Livent’s operations for the three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem. Refer to Note 4 for further information related to the Allkem Livent Merger.

The accompanying condensed consolidated financial statements were prepared in accordance with the requirements of the Securities and Exchange Commission ("SEC") for interim reporting. As permitted under those rules, certain notes or other financial information that are normally required by U.S. GAAP have been condensed or omitted from these interim financial statements. The financial statements included in this report reflect all normal and recurring adjustments which, in the opinion of management, are necessary for a fair presentation of our condensed consolidated balance sheets as of June 30, 2024 and December 31, 2023, the condensed consolidated results of operations, the condensed consolidated statement of comprehensive income and the condensed consolidated statement of changes in equity for the three and six months ended June 30, 2024 and 2023, and the condensed consolidated cash flows for the six months ended June 30, 2024 and 2023. All intercompany transactions and balances have been eliminated in consolidation. For entities that we control, but own less than 100%, we record the minority ownership as noncontrolling interest. The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year. These statements, therefore, should be read in conjunction with the annual consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (the "2023 Annual Report on Form 10-K").

Reclassifications

Certain prior period balances have been reclassified to conform to the current period presentation in the condensed consolidated financial statements and the accompanying notes.

12

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Effective April 1, 2024, we began presenting gains and losses from foreign currency remeasurements as a component of Other gains/losses. Prior to April 1, 2024, we included gains and losses resulting from foreign currency remeasurements as a component of Cost of sales and Restructuring and other charges in the condensed consolidated statement of operations. The following tables summarize the accounts that were recast for the three and six months ended June 30, 2023 and the three months ended March 31, 2024 to conform to the current period presentation.

	Three Months Ended June 30,						Six Months Ended June 30
	2023						2023
(in Millions)	Prior Presentation		Loss/(gain) Reclassified		Recast Presentation		Prior Presentation		Loss/(gain) Reclassified		Recast Presentation
Cost of sales	$	92.4	$	3.9	$	88.5	$	179.9	$	5.1	$	174.8
Restructuring and other charges	24.2		(0.1)		24.3		26.1		(0.2)		26.3
Other (gains)/losses	(11.4)		3.8		(7.6)		(11.4)		4.9		(6.5)

	Three Months Ended March 31,
	2024
(in Millions)	Prior Presentation		(Gain)/loss Reclassified		Recast Presentation
Cost of sales	$	116.8	$	(38.0)	$	154.8
Restructuring and other charges	$	83.6	$	3.8	$	79.8
Other (gains)/losses	$	(43.1)	$	(34.2)	$	(77.3)

Segment Information

In January 2024, Arcadium Lithium completed the Allkem Livent Merger. See Note 4, Allkem Livent Merger for further details. Following the closing of the Allkem Livent Merger, we currently operate as one reportable segment based on the commonalities among our products and services. As integration evolves, we will continue to assess this determination.

Revenue Recognition

Revenue from product sales is recognized when we satisfy a performance obligation by transferring the promised goods to a customer, that is, when control of the good transfers to the customer. Payment terms generally range from 20 to 180 days.

In determining when the control of goods is transferred, we typically assess, among other things, the transfer of title and risk of loss and the shipping terms of the contract.

We record amounts billed for shipping and handling fees as revenue. Costs incurred for shipping and handling are recorded in cost of sales. When we perform shipping and handling activities after the transfer of control to the customer (e.g., when control transfers prior to delivery), they are considered fulfillment activities, and accordingly, the costs are accrued to cost of sales when the related revenue is recognized.

Amounts billed for sales and use taxes, VAT, and certain excise and other specific transactional taxes imposed on revenue-producing transactions are presented on a net basis and excluded from revenue in the condensed consolidated statements of operations. We record a liability until remitted to the respective taxing authority.

We satisfy our obligations by transferring goods and services in exchange for consideration from customers. The timing of performance sometimes differs from the timing the associated consideration is received from the customer, thus resulting in the recognition of a contract asset or liability. These may arise from provisional pricing within certain of our customer contracts, or if the customer’s payment of consideration is received prior to completion of our related performance obligation. Provisional pricing results in variable consideration which we estimate by using an expected value method taking into account all information that is reasonably available including publicly available pricing forecasts. We only include variable consideration within the transaction price to the extent that it is probable that a significant reversal in the amount of revenue recognized will not occur.

13

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Equity method investments

We stop applying the equity method when we have reduced the value of our equity method investment, commitments and additional investments (i.e., loans or advances) in the investee to zero. If the investee subsequently reports net income, we resume applying the equity method when our share of that net income is equal to the suspended losses (i.e., our share of the investee's net losses not previously recognized).

If facts and circumstances indicate that a decrease in value of the investment has occurred that is other than temporary, we recognize an impairment loss equal to an amount by which the carrying amount exceeds the fair value of the equity method investment. There were no impairments during the six months ended June 30, 2024.

Goodwill

The Company accounts for goodwill and other intangibles acquired in a business combination in conformity with current accounting guidance that requires that goodwill and indefinite-lived intangible assets not be amortized.

Under the guidance, goodwill is tested for impairment by comparing the estimated fair value of reporting units to the related carrying value. Reporting units are either operating business segments or one level below operating business segments for which discrete financial information is available and for which operating results are regularly reviewed by the business management. In applying the goodwill impairment test, a qualitative test ("Step 0") is initially performed, under which qualitative factors are assessed to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. Qualitative factors may include, but are not limited to, economic conditions, industry and market considerations, cost factors, overall financial performance of the reporting units and other entity and reporting unit specific events. If after assessing these qualitative factors, it is determined that it is "more-likely-than-not" that the fair value of the reporting unit is less than the carrying value, a quantitative test ("Step 1") is performed. During Step 1, the fair value is estimated using a discounted cash flow model.

Impairment evaluations of goodwill could result in a reduction in our recorded asset values which could have a material adverse effect on our financial position and results of operations. We perform reviews of goodwill on an annual basis, or more frequently if triggering events indicate a possible impairment. We test goodwill at the reporting unit level by comparing the carrying value of the net assets of the reporting unit, including goodwill, to the reporting unit's fair value. If the carrying values of goodwill exceed their fair value, the goodwill would be considered impaired. If any impairment or related charge is warranted, our financial position and results of operations could be materially affected. Any such impairment or related charge could be a result of, for example, sustained declines in the Company’s stock price; the deterioration of the cost of equity or debt capital increases due to valuations for comparable companies or comparable acquisitions valuations; or the deterioration of the outlook for future cash flows for the reporting unit due to but not limited to, increased competition, changes to discount rate, downward forecast revisions, restricted plans or changes in applicable regulations affecting our business.

Mine Development Costs

Mine development costs include: a) exploration and evaluation ("E&E") expenditures incurred during the search for mineral resources as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource; and b) stripping costs of removing overburden and waste materials to access the mineral body at an open pit mine.

The Company capitalizes E&E expenditures to PP&E under a successful efforts basis when proven and probable reserves are established for the sites where E&E activities are being performed. E&E assets recognized as part of business combinations are also capitalized. All other E&E expenditures are expensed.

Stripping costs incurred prior to the production phase are capitalized to PP&E during the development of an open pit mine. When multiple open pits exist at a mining complex utilizing common processing facilities, such pre-production stripping costs are capitalized at each pit. The removal, production, and sale of de minimis saleable materials may occur during the development phase of an open pit mine and are assigned incremental mining costs related to the removal of that material. The production phase of an open pit mine commences when saleable minerals, beyond a de minimis amount, are produced. Stripping costs incurred during the production phase of a mine are variable production costs that are included as a component of inventory to be recognized in Cost of sales in the same period as the revenue from sale of that inventory.

Capitalized mine development costs are amortized using the units-of-production method based on estimated recoverable minerals in proven and probable reserves, and are amortized over the estimated life of the mineral body.

14

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Mineral Interests

Mineral interests include acquired interests in production, development and exploration stage properties. Mineral interests are capitalized at their fair value at the acquisition date, either as an individual asset purchase or as part of a business combination. Mineral interests in the development and exploration stage are not amortized until the underlying property is converted to the production stage, at which point the mineral interests are amortized over the estimated recoverable proven and probable reserves using a units-of-production method.

Asset Retirement Obligations

The Company accounts for asset retirement obligations ("AROs") in accordance with ASC 410-20, Asset Retirement Obligations "ASC 410-20". We record AROs at present value at the time the liability is incurred if we can reasonably estimate the settlement date. The associated AROs are capitalized as part of the carrying amount of related long-lived assets. In future periods, the liability is accreted to its present value and the capitalized cost is depreciated over the useful life of the related asset. We also adjust the liability for changes resulting from the passage of time and/or revisions to the timing or the amount of the original estimate. Upon retirement of the long-lived asset, we settle the obligation for its recorded amount. See Note 14, for details.

The carrying amounts of the AROs as of June 30, 2024 and December 31, 2023 was $11.3 million and $3.7 million, respectively. These amounts are included in Accrued and other current liabilities and Other long-term liabilities in our condensed consolidated balance sheets.

Blue Chip Swap

Our wholly owned subsidiaries in Argentina use the U.S. dollar as their functional currency. Argentina peso-denominated monetary assets and liabilities are remeasured at each balance sheet date to the official currency exchange rate then in effect which represents the exchange rate available for external commerce (import payments and export collections) and financial payments, with currency remeasurement and other transaction gains and losses recognized in earnings. In September 2019, the President of Argentina reinstituted exchange controls restricting foreign currency purchases in an attempt to stabilize Argentina’s financial markets. As a result, a legal trading mechanism known as the Blue Chip Swap emerged in Argentina for all individuals or entities to transfer U.S. dollars out of and into Argentina. The Blue Chip Swap rate is the implicit exchange rate resulting from the Blue Chip Swap transaction. In the first half of 2024, U.S. dollars were transferred into Argentina through the Blue Chip Swap method whereby we realized a gain from the purchase in U.S. dollars and sale in Argentina pesos of Argentina Sovereign U.S. dollar-denominated bonds. The gain of $20.9 million and $50.5 million for the three and six months ended June 30, 2024 was recorded to Other gains in our condensed consolidated statements of operations.

Li-Metal transaction

On August 2, 2024, Arcadium announced it acquired the lithium metal division of Li-Metal Corp. The all-cash $11 million USD transaction includes the intellectual property and physical assets related to lithium metal production, including a pilot production facility in Ontario, Canada.

Arcadium Lithium uses lithium metal to manufacture specialty products, including high purity lithium metal ("HPM") and LIOVIX®, a proprietary printable lithium metal formulation, for primary battery applications and next-generation batteries. Arcadium Lithium also processes lithium metal into butyllithium, as well as other lithium specialty chemicals used in medicine, agriculture, electronics and other industries.

Note 3: Recently Issued and Adopted Accounting Pronouncements and Regulatory Items

In December 2023, the Financial Accounting Standard Board ("FASB") issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU enhances existing income tax disclosures to better assess how an entity's operation and related tax risks, tax planning, and operational opportunities affect its tax rate and prospects for future cash flows. The ASU is effective for annual periods beginning after December 15, 2024. We are currently evaluating the effect the guidance will have on our condensed consolidated financial statements.

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU improves reportable segment disclosure requirements, primarily through enhanced disclosures related to significant segment expenses. The ASU is effective for annual periods beginning after December 15, 2023, and interim periods beginning after December 15, 2024. We are currently evaluating the effect the guidance will have on our condensed consolidated financial statements.

15

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Note 4: Allkem Livent Merger

On January 4, 2024 (the "Acquisition Date") Arcadium completed the previously announced Allkem Livent Merger by and among Livent Corporation, a Delaware corporation ("Livent"), Allkem Limited, an Australian public company ("Allkem"), Arcadium Lithium plc, a public limited company incorporated under the laws of the Bailiwick of Jersey ("Arcadium"), Lightning-A Merger Sub, Inc. ("Merger Sub"), and Arcadium Lithium Intermediate IRL Limited, a private company limited by shares and incorporated and registered in Ireland ("Irish IntermediateCo").

The transaction was consummated by way of (a) a scheme of arrangement under Australian law, pursuant to which each issued, fully paid ordinary share of Allkem held by Allkem shareholders was exchanged for either one Arcadium Lithium CHESS Depositary Instrument (a "CDI") quoted on the Australian Stock Exchange (each CDI representing a beneficial ownership interest in one Arcadium ordinary share), or one Arcadium ordinary share (par value $1.00 per share) and (b) a merger, whereby Merger Sub, a wholly owned subsidiary of Irish IntermediateCo (a direct wholly owned subsidiary of Arcadium) merged with and into Livent, with Livent as the surviving entity. Each share of Livent common stock, par value $0.001 per share (each, a "Livent Share"), was converted into the right to receive 2.406 Arcadium ordinary shares.

Pursuant to the Allkem Livent Merger, 433,156,855 Arcadium ordinary shares (including 96,909 related to accelerated PRSU awards) were issued to former Livent stockholders and 641,337,840 Arcadium ordinary shares (comprising 98,725,616 Arcadium ordinary shares and 542,612,224 CDIs in respect of Arcadium ordinary shares) were issued to former Allkem shareholders. The Acquisition Date fair value of consideration transferred consisted of the following:

(in millions)	Amount
Consideration:
Fair value of Arcadium ordinary shares issued to Allkem shareholders	$	4,385.6
Fair value of converted Allkem performance rights attributable to pre-combination service	4.8
Total consideration	$	4,390.4

The Allkem Livent Merger meets the criteria to be accounted for as a business combination and is accounted for using the acquisition method of accounting with Livent being treated as the accounting acquirer. Under the acquisition method of accounting, the assets and liabilities of Allkem and its subsidiaries are recorded at their respective fair values as of the date of completion of the Allkem Livent Merger and the difference between the fair value of the consideration paid for the acquired entity and fair value of the net assets acquired is recorded as goodwill.

The fair value of the assets, liabilities and noncontrolling interest of Allkem under the business combination guidance, including the impact of income taxes, is preliminary. The preliminary fair value allocation is subject to change for up to one year subsequent to the Acquisition Date. Determining the fair value of the assets and liabilities of Allkem requires judgement and certain assumptions to be made, the most significant of these being related to the valuation of Allkem's mining properties and rights.

Transaction and related costs directly attributable to the acquisition of Allkem, consisting primarily of advisor fees, legal fees, accounting fees, and certain deal related bonuses were $19.8 million and $86.8 million, for the three and six months ended June 30, 2024, respectively. The costs were expensed as incurred and are included in restructuring and other charges.

16

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

The following table summarizes the preliminary purchase price allocation for the Allkem Livent Merger as of January 4, 2024, which is subject to change:

(in Millions, except per share amounts)	Amount
Total consideration	$	4,390.4
Assets acquired:
Cash and cash equivalents	$	681.4
Trade receivables	64.2
Inventories	121.3
Prepaid and other current assets	87.2
Property, plant and equipment	4,326.1
Right of use assets - operating leases, net	53.4
Deferred income tax assets	26.3
Other assets (1)	192.9
Total assets acquired	$	5,552.8
Liabilities assumed:
Accounts payable, trade and other	$	223.7
Accrued and other current liabilities	35.1
Income taxes	78.5
Long-term debt including current portion	301.7
Operating lease liabilities - long-term	53.4
Environmental liabilities	9.8
Deferred income tax liabilities	1,315.3
Other long-term liabilities	49.5
Total liabilities assumed	$	2,067.0
Fair value of net assets acquired	$	3,485.8
Add: Fair value of noncontrolling interests acquired	275.0
Fair value of net assets acquired less noncontrolling interests acquired	$	3,210.8
Goodwill	$	1,179.6

___________________

1.Includes long-term semi-finished goods inventory.

Trade receivables

The $64.2 million of acquired trade receivables represents the fair value of the gross amount due under the contracts.

Property, Plant and Equipment

Property, plant and equipment is inclusive of the fair value of mineral rights totaling $2,745 million and non-mineral rights property, plant and equipment totaling $1,581.1 million. The fair value of the mineral rights was estimated using the multi-period excess earnings method. The excess earnings methodology is an income approach methodology that estimates the projected cash flows of the business attributable to the asset, net of charges for the use of other identifiable assets of the business including working capital, fixed assets, and other intangible assets. Mineral rights are depreciated using a units-of-production method while all other property, plant and equipment is depreciated using the straight-line method.

Goodwill

Goodwill from acquisitions represents the excess of the purchase price over the fair value of net assets acquired. The amount disclosed within the table, subject to change for up to one year subsequent to the Acquisition Date, is attributable to the value of growth opportunities and expected synergies created by incorporating Allkem's business and operations into the Company's operations and the value of the assembled workforce. The goodwill has no amortizable basis for income tax purposes.

17

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Allkem revenues and earnings

The following table represents Allkem's revenues and net earnings included in Arcadium's condensed consolidated statements of operations from the Acquisition Date through June 30, 2024.

(in Millions)	Three Months Ended June 30,		Six Months Ended June 30,
	2024
Revenue	$	83.8	$	186.3
Income from operations before income taxes	$	75.8	$	152.2

Pro Forma Financial Information

Due to the Allkem Livent Merger closing on January 4, 2024, all activity in the first quarter of 2024 except for the first three days of January, which management deemed not material, is included in Arcadium’s condensed consolidated statements of operations. The following unaudited pro forma financial information for the three and six months ended June 30, 2023 is based on our historical consolidated financial statements adjusted to reflect the Allkem Livent Merger as if it occurred on January 1, 2023, the first day of the most recently completed fiscal year. The unaudited pro forma financial information is not necessarily indicative of what would have occurred if the Allkem Livent Merger had been completed as of the beginning of the periods presented, nor is it indicative of future results. The unaudited pro forma information is not necessarily indicative of operating results that would have been achieved had the acquisition been completed as of January 1, 2023 and does not intend to project the future financial results of the Company after the acquisition. The unaudited pro forma information is based on certain assumptions, which management believes are reasonable, and does not reflect the cost of any integration activities or synergies that may be derived from any integration activities. The unaudited pro forma financial results are as follows:

(in Millions)	Three Months Ended June 30,		Six Months Ended June 30,
	2023
	(Unaudited)
Revenue	$	569.8	$	1,139.2
Net income	278.4		$	513.4

Note 5: Goodwill

The following table summarizes the changes in goodwill for the six months ended June 30, 2024.

(in Millions)	Allkem		Nemaska Lithium		Total
Balance as of December 31, 2023	$	—	$	120.7	$	120.7
Acquisitions - Allkem Livent Merger	1,189.2		—		1,189.2
Measurement period adjustments	(9.6)		—		(9.6)
Balance as of June 30, 2024	$	1,179.6	$	120.7	$	1,300.3

See Note 4 for further details.

18

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Note 6: Revenue Recognition     

Disaggregation of revenue

We disaggregate revenue from contracts with customers by geographical areas (based on product destination) and by product categories. The following table provides information about disaggregated revenue by major geographical region:

(in Millions)	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Asia Pacific (1)	$	211.8	$	171.6	$	431.9	$	338.6
North America (1)	22.8		40.7		43.5		92.6
Europe, Middle East & Africa	19.5		23.5		39.1		56.3
Latin America	0.4		—		1.2		1.8
Consolidated Revenue	$	254.5	$	235.8	$	515.7	$	489.3

1.During the three months ended June 30, 2024, countries with sales in excess of 10% of consolidated revenue consisted of China and Japan. Sales for the three months ended June 30, 2024 for China and Japan totaled $155.1 million and $31.8 million, respectively. During the six months ended June 30, 2024, countries with sales in excess of 10% of consolidated revenue consisted of China, Japan, and South Korea. Sales for the six months ended June 30, 2024 for China, Japan, and South Korea totaled $281.0 million, $77.8 million, and $64.9 million, respectively. During the three months ended June 30, 2023, countries with sales in excess of 10% of consolidated revenue consisted of China, Japan, the U.S., and South Korea. Sales for the three months ended June 30, 2023 for China, Japan, the U.S., and South Korea totaled $90.8 million, $42.7 million, $39.9 million, and $31.2 million, respectively. During the six months ended June 30, 2023, countries with sales in excess of 10% of consolidated revenue consisted of China, the U.S., Japan, and South Korea. Sales for the six months ended June 30, 2023 for China, the U.S., Japan, and South Korea, totaled $179.2 million, $90.1 million, $76.1 million, and $66.3 million, respectively.

For the three months ended June 30, 2024, two customers accounted for approximately 24%, and 21%, respectively, of consolidated revenue and our 10 largest customers accounted in aggregate for approximately 72% of consolidated revenue. For the six months ended June 30, 2024, three customers accounted for approximately 23%, 18%, and 10%, respectively, of consolidated revenue and our 10 largest customers accounted in aggregate for approximately 73% of consolidated revenue. For the three months ended June 30, 2023, two customers accounted for approximately 24% and 23% of consolidated revenue and our 10 largest customers accounted in aggregate for approximately 72% of consolidated revenue. For the six months ended June 30, 2023, two customers accounted for approximately 24% and 21% of consolidated revenue and our 10 largest customers accounted in aggregate for approximately 68% of consolidated revenue. A loss of any material customer could have a material adverse effect on our business, financial condition and results of operations.

The following table provides information about disaggregated revenue by major product category:

(in Millions)	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Lithium Hydroxide	$	113.1	$	153.6	$	223.7	$	306.3
Lithium Carbonate (1)	72.7		5.1		152.5		14.5
Butyllithium and Other Lithium Specialties	44.9		77.1		90.9		168.5
Spodumene Concentrate (2)	23.8		—		48.6		—
Consolidated Revenue	$	254.5	$	235.8	$	515.7	$	489.3

______________________

1.Includes lithium carbonate by-product revenue.

2.Includes low-grade spodumene sales and minimal other products.

Contract asset and contract liability balances

We satisfy our obligations by transferring goods and services in exchange for consideration from customers. The timing of performance sometimes differs from the timing the associated consideration is received from the customer, thus resulting in the recognition of a contract asset or liability. Provisional pricing within certain of our customer contracts may result in recognition

19

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

of a contract asset or liability. We recognize a contract liability if the customer’s payment of consideration is received prior to completion of our related performance obligation.

The following table presents the opening and closing balances of our contract liabilities and current trade receivables, net of allowances from contracts with customers.

(in Millions)	Balance as of June 30, 2024		Balance as of December 31, 2023		(Decrease)/increase
Receivables from contracts with customers, net of allowances	$	94.1	$	106.7	$	(12.6)
Contract liability - short-term	37.1		4.4		32.7
Contract liability - long-term	253.8		217.8		36.0

Performance obligations

Occasionally, we may enter into multi-year take or pay supply agreements with customers. The aggregate amount of revenue expected to be recognized related to these contracts’ performance obligations is approximately $1.7 billion in the next five years. Based on our past experience with the customers under these arrangements, we expect to continue recognizing revenue in accordance with the contracts as we transfer control of the product to the customer. However, in the case a shortfall of volume purchases occurs, we will recognize the amount payable by the customer over the remaining performance obligations in the contract.

Note 7: Inventories, Net

Inventories consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
Finished goods	$	130.3	$	59.1
Semi-finished goods	101.4		108.8
Raw materials, supplies, and other	101.4		49.6
Inventory, net	$	333.1	$	217.5

Inventories are stated at the lower of cost or net realizable value. Inventory costs include those costs directly attributable to products before sale, including all manufacturing overhead but excluding distribution costs. All inventories are determined on a first-in, first-out ("FIFO") basis.

Note 8: Investments    

Investments consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
ESM ILiAD, LLC	$	30.1	$	30.1
Arcadium NQSP	6.3		4.7
Other	1.8		—
Investments	$	38.2	$	34.8

ESM ILiAD, LLC ("ESM")

In the fourth quarter of 2023, the Company entered into an agreement with EnergySource Minerals, LLC ("EnergySource"), a developer of lithium projects in the Salton Sea Known Geothermal Resource Area in California, for a minority equity interest in ESM, a subsidiary of EnergySource and the parent company of ILiAD Technologies, LLC ("ILiAD Technologies"). In connection with its investment in ESM, Arcadium Lithium will have the right to license ILiAD Technologies' Integrated Lithium Adsorption Desorption ("ILiAD") technology for potential deployment at its lithium brine resources in Argentina.

20

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Arcadium Lithium accounts for its interest in ESM under ASC Topic 321, Investments – Equity Securities ("ASC 321"). Since our investment in ESM does not have a readily determinable fair value, we use the measurement alternative under ASC 321. Our investment is measured at cost less impairments, adjusted for observable price changes in orderly transactions for the identical or similar investment of the same issuer. If the Company determines that an indicator of impairment or upward adjustment is present, an adjustment is recorded, which is measured as the difference between carrying value and estimated fair value. Estimated fair value is generally determined using an income approach on discounted cash flows or negotiated transaction values. As of June 30, 2024 and December 31, 2023, the carrying amount of our investment in ESM was $30.1 million.

Toyotsu Lithium Corporation ("TLC")

The Company owns 49% of the Class A voting shares and 100% of the Class B non-voting shares in TLC. Toyota Tsusho Corporation ("TTC") owns 51% of the Class A voting shares. As a result, the Company has a 75% economic interest and a 49% ownership interest in TLC and TTC has the remaining 25% economic interest and 51% ownership interest in TLC. TLC constructed and now operates the Naraha Lithium Hydroxide Plant (the "Naraha Plant"), located in Japan. The technical grade lithium carbonate feedstock for the plant is sourced from the Company’s Olaroz Plant.

The Company accounts for its interest in TLC as an equity method investment because it does not have control but has significant influence. This is evidenced by the Company having 2 of the 5 board members while decisions are made by a majority. In addition to capital contributions made through its investment in TLC, Allkem has also provided past funding through loans. At the Acquisition Date, the carrying values of the investment in TLC and a fully reserved loan receivable were zero and fair value was deemed to be equal to carrying value.

For the three and six months ended June 30, 2024, we did not record any gains or losses related to our interest in TLC to Equity in net loss of unconsolidated affiliates in our condensed consolidated statements of operations. At June 30, 2024, the carrying values of our interest in TLC and the loan receivable were zero.

Note 9: Partially-Owned Subsidiaries and Noncontrolling Interests

Nemaska Lithium Inc. ("Nemaska Lithium", or "NLI")

Nemaska Lithium, domiciled in Canada and headquartered in Montreal, Québec, is a non-public lithium company not yet in the production stage. It is a development company aiming to vertically integrate, from extracting, processing and concentrating spodumene to conversion of spodumene into battery-grade lithium hydroxide, primarily intended for EV and other energy storage applications. Its primary assets are construction in progress and intangibles principally related to intellectual property. Nemaska Lithium intends to develop the Whabouchi spodumene mine and concentrator in the James Bay region of Québec and a lithium hydroxide conversion plant in Bécancour, Québec (collectively, the "Nemaska Lithium Project"). As a developing company and to fund the Nemaska Lithium Project, Nemaska Lithium is reliant on securing financing from its shareholders through share subscriptions.

On October 18, 2023, we entered into an amendment to our shareholders agreement with Nemaska Lithium, and also amendments to certain related service agreements. The amendments to these agreements provide QLP with control of certain substantive participating rights, and as such, the Company began to consolidate Nemaska Lithium as of October 18, 2023. Nemaska Lithium is a development company which, as of the October 18, 2023 consolidation date, met the U.S. GAAP definition of a business and, as such, the Company remeasured its equity interest in Nemaska, including the noncontrolling interest of Investissement Québec ("IQ"), at fair value as of the consolidation date. We estimated the fair value of IQ's noncontrolling interest by multiplying the total fair value of Nemaska Lithium equity by IQ's equity ownership interest and also considered any discounts for lack of control and marketability.

The fair value of the assets and liabilities of Nemaska Lithium assumed under business combination accounting guidance for the Nemaska Lithium consolidation, including the impact of income taxes, is preliminary. The preliminary fair value allocation is subject to change for up to one year subsequent to the October 18, 2023 consolidation date of Nemaska Lithium. Determining the fair value of the assets and liabilities of Nemaska Lithium requires judgment and certain assumptions to be made, the most significant of these being related to the valuation of Nemaska Lithium's mining properties and rights. Nemaska Lithium is consolidated on a one-quarter lag basis.

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ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Before October 18, 2023, the Company accounted for its 50% interest in Nemaska Lithium as an equity method investment on a one-quarter lag basis and it was included in Investments in our consolidated balance sheets. The carrying amount of our interest in Nemaska Lithium was $437.1 million as of December 31, 2022 under equity method investment accounting. For the three and six months ended June 30, 2023 we recorded a $7.2 million and $15.3 million loss related to our interest in Nemaska Lithium to Equity in net loss of unconsolidated affiliate in our condensed consolidated statements of operations.

Arcadium's cash and cash equivalents balance in its condensed consolidated balance sheet as of June 30, 2024 includes Nemaska Lithium's cash of $149.7 million at March 31, 2024 as Nemaska Lithium is consolidated on a one-quarter lag. All cash at Nemaska Lithium will be used for capital expenditures and operating expenses of the Nemaska Lithium Project.

On March 28, 2024, Nemaska Lithium received cash of $150 million related to a second advance payment in connection with a customer supply agreement repayable in equal quarterly installments beginning in January 2027 and ending in October 2031. The related liability, consolidated on a quarter lag basis, is $97.8 million debt and $52.2 million contract liability. A total of $350 million in prepayments are expected from the customer and as of June 30, 2024, $225 million has been received.

Sales de Jujuy Pte Ltd and Sales de Jujuy S.A.

The Company has an interest of 72.68% in Sales de Jujuy Pte Ltd ("SDJ Pte"), 66.5% in Sales de Jujuy S.A. ("SDJ SA"), the legal entities which operate the Olaroz Lithium Facility (the "Olaroz Plant").

Located in the Jujuy Province of northern Argentina, the Olaroz Plant produces lithium carbonate chemicals for the battery, technical and chemical markets. The Olaroz Plant is operated through SDJ SA, which is a 91.5% owned subsidiary of SDJ Pte, a Singaporean company owned by Arcadium (72.68%) and Toyotsu Lithium Pte Ltd. (27.32%), an affiliated company of TTC. Jujuy Energia y Minera Sociedad del Estado ("JEMSE") owns the remaining 8.5% of SDJ SA. Consequently, the effective equity ownership of the Olaroz Plant is 66.5% by Arcadium, 25% by TTC, and 8.5% by JEMSE.

As of June 30, 2024, Arcadium had restricted cash of $24.6 million on deposit with Mizuho as collateral for the Project Loan Facility and classified within Other non-current assets in its condensed consolidated balance sheets. See Note 15 for details.

Arcadium's cash and cash equivalents balance in its condensed consolidated balance sheet as of June 30, 2024 includes $65 million held by the entities discussed above.

Arcadium funded JEMSE’s equity contributions in SDJ SA with an interest-free loan (the "JEMSE Receivable") to be repaid by JEMSE out of 33% of the dividends it receives from SDJ SA. The fair value of the non-current receivable is $5.0 million as of June 30, 2024.

Note 10: Property, Plant and Equipment, Net

Property, plant and equipment consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
Land and land improvements	$	319.8	$	106.2
Buildings	896.7		134.9
Machinery and equipment	735.0		420.7
Mineral rights	3,280.0		560.0
Construction in progress	2,111.2		1,284.4
Total cost	$	7,342.7	$	2,506.2
Accumulated depreciation	(307.8)		(269.1)
Property, plant and equipment, net	$	7,034.9	$	2,237.1

Depreciation is calculated principally on a straight-line basis over the estimated useful lives of the assets or a units-of-production basis based on the rate of depletion of reserves. Land is not depreciated. The major classifications of property, equipment and software, including their respective principal depreciation and amortization method and expected useful lives, consisted of the following:

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ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Asset type	Depreciation and amortization method	Useful Life
Land	N/A	—
Land improvements	Straight-line	20 years
Buildings	Straight-line	20-40 years
Mineral rights	Units-of-production	Based on rate of depletion of reserves
Mining extraction equipment	Units-of-production	Based on rate of depletion of reserves
Leased plant and equipment	Straight-line	Lease period (1-10.5 years)
Other machinery and equipment	Straight-line	3-18 years
Software	Straight-line	3-10 years

Depreciation expense was $44.7 million and $12.3 million for the six months ended June 30, 2024 and 2023, respectively.

Note 11: Restructuring and Other Charges

The following table shows other charges included in Restructuring and other charges in the condensed consolidated statements of operations:

	Three Months Ended June 30,				Six Months Ended June 30,
(in Millions)	2024		2023		2024		2023
Restructuring charges:
Severance-related and exit costs	$	3.2	$	0.7	$	14.1	$	2.4
Other charges:
Costs related to the Allkem Livent Merger	19.8		18.8		86.8		18.8
Bessemer City plant fire loss	—		5.0		—		5.0
Other	(1.1)		(0.2)		0.8		0.1
Total Restructuring and other charges	$	21.9	$	24.3	$	101.7	$	26.3

23

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Note 12: Other gains

The following table shows amounts included in Other gains in the condensed consolidated statements of operations:

	Three Months Ended June 30,				Six Months Ended June 30,
(in Millions)	2024		2023		2024		2023
Blue Chip Swap gains: (1)
Non-recurring - SDV SA and MdA Holdings LLC (2)	$	16.8	$	11.4	$	36.5	$	11.4
Recurring - SDJ and MdA	4.1		—		14.0		—
Total Blue Chip Swap gains	20.9		11.4		50.5		11.4
Foreign currency remeasurement gains/(losses):
Remeasurement gains on U.S. dollar denominated cash held by foreign currency functional subsidiary	0.4		—		14.3		—
All other foreign currency remeasurement gains/(losses) (3)	58.6		(3.8)		92.8		(4.9)
Total Foreign currency remeasurement gains/(losses)	59.0		(3.8)		107.1		(4.9)
Loss on trading securities	—		—		(0.4)		—
Total Other gains	$	79.9	$	7.6	$	157.2	$	6.5

___________________________

1.See Note 2 for details.

2.Represents the non-recurring gain from the sale in Argentina pesos of Argentina Sovereign U.S. dollar-denominated bonds due to the divergence of Argentina's Blue Chip Swap market exchange rate from the official rate.

3.The three and six months ended June 30, 2024 primarily includes impact of currency fluctuations on deferred income tax assets and liabilities related to the Allkem Livent Merger.

Note 13: Income Taxes

We determine our interim tax provision using an estimated annual effective tax rate methodology ("EAETR") in accordance with U.S. GAAP. The EAETR is applied to the year-to-date ordinary income, exclusive of discrete items. The tax effects of discrete items are then included to arrive at the total reported interim tax provision.

The determination of the EAETR is based upon a number of estimates, including the estimated annual pretax ordinary income in each tax jurisdiction in which we operate. As our projections of ordinary income change throughout the year, the EAETR will change period-to-period. The tax effects of discrete items are recognized in the tax provision in the period they occur in accordance with U.S. GAAP. Depending on various factors, such as the item’s significance in relation to total income and the rate of tax applicable in the jurisdiction to which it relates, discrete items in any quarter can materially impact the reported effective tax rate. As a global enterprise, our tax expense can be impacted by changes in tax rates or laws, the finalization of tax audits and reviews, as well as other factors. As a result, there can be significant volatility in interim tax provisions.

Provision for income taxes for the three and six months ended June 30, 2024 was an expense of $35.3 million and $89.1 million resulting in an effective tax rate of 27.2% and 43.8%, respectively. Provision for income taxes for the three and six months ended June 30, 2023 was an expense of $14.6 million and $38.5 million resulting in an effective tax rate of 13.9% and 15.8%, respectively.

Note 14: Asset Retirement Obligations

Legacy Allkem asset retirement obligations acquired in the Allkem Livent Merger were recorded at fair value on the Acquisition Date and consist of $7.3 million, $1.5 million and $1.0 million related to the Mt Cattlin spodumene mine in Western Australia, the Olaroz lithium brine extraction facility in Jujuy, Argentina and the Sal de Vida lithium brine extraction facility (currently under development) in Catamarca, Argentina, respectively.

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ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Note 15: Debt

Long-term debt

Long-term debt consists of the following:

	Interest Rate Percentage			Maturity Date	June 30, 2024		December 31, 2023
(in Millions)	SOFR borrowings	Base rate borrowings
Revolving Credit Facility (1)	7.19%	9.25%		2027	$	—	$	—
4.125% Convertible Senior Notes due 2025			4.125%	2025	245.8		245.8
Transaction costs - 2025 Notes					(1.6)		(2.4)
Nemaska - Prepayment agreement - tranche 1 (2)			8.9%		75.0		75.0
Discount - Prepayment agreement					(19.4)		(19.8)
Nemaska - Prepayment agreement - tranche 2 (2)			9.4%		150.0		—
Discount - Prepayment agreement					(53.4)		—
Nemaska - Other					0.5		3.4
Debt assumed in Allkem Livent Merger (3)
Project Loan Facility - Stage 1 of Olaroz Plant			4.90%	2024	9.1		—
Project Loan Facility - Stage 2 of Olaroz Plant			2.61%	2029	144.0		—
Affiliate Loans with TTC			15.25%	2030	81.5		—
Affiliate Loan with TLP			10.34%	2026	2.5		—
Total debt assumed in Allkem Livent Merger					237.1		—
Subtotal long-term debt (including current maturities)					634.0		302.0
Less current maturities					(43.4)		(2.4)
Total long-term debt					$	590.6	$	299.6

______________________________

1.As of June 30, 2024 and December 31, 2023, there were $20.6 million and $15.5 million, respectively, in letters of credit outstanding under our Revolving Credit Facility and $479.4 million and $484.5 million available funds as of June 30, 2024 and December 31, 2023, respectively. Fund availability is subject to the Company meeting its debt covenants.

2.Represents advance payments in connection with customer supply agreement which do not have a contractual interest rate or bear any actual interest and are repayable in equal quarterly installments beginning in January 2027 and ending in October 2031. Represents U.S. GAAP imputed interest rate.

3.On May 30, 2024, SDV SA paid the outstanding principal balance of $47.0 million, a prepayment fee of $0.9 million and accrued interest and commitment fees of $1.3 million to repay the Sal de Vida Project Financing Facility in its entirety.

4.125% Convertible Senior Notes due 2025

In 2020, the Company issued $245.8 million in aggregate principal amount of 4.125% Convertible Senior Notes due in July 2025 (the "2025 Notes"). The 2025 Notes are our general unsecured senior obligations. Total net cash proceeds received were $238.2 million net of $7.6 million of third-party transaction costs, including initial purchasers' discounts and commissions. The Company used or will use the net proceeds received to finance or refinance eligible green projects designed to align with the provisions of the International Capital Market Association Green Bond Principles 2018.

Each $1,000 of principal of the 2025 Notes was initially convertible into 114.4885 shares of common stock of Livent Corporation, which was equivalent to an initial conversion price of $8.73 per share, subject to adjustment upon the occurrence of specified events. Following the effectiveness of that certain First Supplemental Indenture, dated as of January 4, 2024, by and among the Company, Livent Corporation and U.S. Bank Trust Company, National Association, each $1,000 of principal of the 2025 Notes is convertible into 275.459331 shares of our ordinary shares, which is equivalent to a conversion price of $3.63 per share, subject to adjustment upon the occurrence of specified events. We may redeem for cash all or any portion of the 2025 Notes, at our option, if the last reported sale price of our ordinary shares has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last

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ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

trading day of such period) ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the 2025 Notes to be redeemed, plus accrued and unpaid interest. Holders of the 2025 Notes may convert their notes at any time, at their option, on or after January 15, 2025. Further, holders of the 2025 Notes may convert their notes at any time, at their option, prior to January 15, 2025 only under the following circumstances: (1) during any calendar quarter commencing after September 30, 2020 (and only during such calendar quarter), if the last reported sale price of our ordinary shares for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each trading day; (2) during the five-business day period after any five-consecutive trading day period in which the trading price per $1,000 principal amount of the 2025 Notes for each trading day of such period is less than 98% of the product of the last reported sale price of our ordinary shares and the conversion rate on each such trading day, (3) if we call any or all of the 2020 Notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date or (4) if specified corporate events occur. Upon conversion, the 2025 Notes will be settled in cash, shares of our ordinary shares or a combination thereof, at our election. If a fundamental change occurs prior to the maturity date, holders of the 2025 Notes may require us to repurchase all or a portion of their 2025 Notes for cash at a repurchase price equal to 100% of the principal amount plus any accrued and unpaid interest. In addition, if specific corporate events occur prior to the maturity date or if we deliver a notice of redemption, we will increase the conversion rate for a holder who elects to convert its 2025 Notes in connection with such an event or notice of redemption in certain circumstances.

The last reported sale price of our ordinary shares for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on, and including, June 30, 2024 was not greater than or equal to 130% of the conversion price as adjusted for the Allkem Livent Merger, which is $4.72, on each trading day, and as a result, the holders do not have the option to convert all or any portion of their 2025 Notes through September 30, 2024.

The conversion rate for the 2025 Notes is 275.4593 ordinary shares of Arcadium Lithium per $1,000 principal amount of 2025 Notes. The 2025 Notes mature in July 2025 and are classified as long-term debt.

On the July 15, 2025 maturity date, we are required to cash settle any outstanding 2025 Notes that have not otherwise been redeemed or converted.

The Company recognized non-cash interest related to the amortization of transaction costs for the 2025 Notes of $0.4 million and $0.8 million for the three and six months ended June 30, 2024, respectively, all of which was capitalized. The Company recorded $2.5 million and $5.0 million of accrued interest expense related to the principal amount for the three and six months ended June 30, 2024, respectively, all of which was capitalized.

Amended and Restated Credit Agreement, (the "Revolving Credit Facility")

On January 4, 2024, Livent Corporation, Livent USA Corp., the Company, Arcadium Lithium Financing IRL Limited ("FinCo") and Irish IntermediateCo (collectively, the "Borrowers" and, each, a "Borrower"), the guarantors party thereto from time to time (the "Guarantors"), the lenders party thereto (the "Lenders") and issuing banks party thereto and Citibank, N.A., as administrative agent (the "Administrative Agent") for the Lenders, entered into a Joinder and First Amendment (the "Credit Agreement Amendment") to that certain Amended and Restated Credit Agreement, dated as of September 1, 2022, among Livent, Livent USA Corp., the guarantors party thereto from time to time, the lenders party thereto from time to time and the Administrative Agent (the "Credit Agreement" and as amended by the Credit Agreement Amendment, the Amended Credit Agreement").

The Credit Agreement Amendment provided for, among other things, (i) the addition of Arcadium, Irish IntermediateCo and FinCo as borrowers and obligors under the Amended Credit Agreement and (ii) the assignment of certain of Livent Corporation's rights and obligations (including information reporting obligations) under the Amended Credit Agreement to Arcadium.

The Revolving Credit Facility provides for a $500 million senior secured revolving credit facility, $50 million of which is available for the issuance of letters of credit for the account of the Borrowers, with an option to request, and subject to each Lender’s sole discretion, that the aggregate revolving credit commitments be increased to up to $700 million. The issuance of letters of credit and the proceeds of revolving credit loans made pursuant to the Revolving Credit Facility may be used for general corporate purposes, including capital expenditures and permitted acquisitions.

Revolving loans under the Revolving Credit Facility will bear interest at a floating rate, which will be (i) a base rate, (ii) Adjusted Term Secured Overnight Financing Rate ("SOFR") (defined as the forward-looking SOFR term rate published by CME Group Benchmark Administration Limited plus 0.10% per annum subject to a floor of zero) or (iii) Euro Interbank

26

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Offered Rate ("EURIBOR"), plus, in each case, an applicable margin, as determined in accordance with the provisions of the Revolving Credit Facility. The Revolving Credit Facility includes a quarterly commitment fee on the average daily unused amount of each Lender’s revolving credit commitment at a rate equal to an applicable percentage based on the Company’s first lien leverage ratio. The initial commitment fee is 0.25% per annum. Amounts under the Revolving Credit Facility may be borrowed, repaid and re-borrowed from time to time until the final maturity date on September 1, 2027. Voluntary prepayments and commitment reductions are permitted at any time without payment of any prepayment fee upon proper notice and subject to minimum dollar amounts. Certain of the Borrowers’ domestic subsidiaries (the "Guarantors") guarantee the obligations of the Borrowers under the Revolving Credit Facility. The obligations of the Borrower and the Guarantors are secured by all of the assets of the Borrowers and the Guarantors, including the Borrowers’ facility and real estate in Bessemer City, North Carolina, subject to certain exceptions and exclusions.

We recorded $0.8 million of incremental deferred financing costs in the condensed consolidated balance sheets for the Revolving Credit Facility commitment and legal fees and a zero and $0.2 million loss on debt extinguishment in the condensed consolidated statements of operations for the three and six months ended June 30, 2024, respectively, for the write off of existing deferred financing costs to recognize a partial change in syndication related to the Revolving Credit Facility. The carrying value of our deferred financing costs was $2.5 million as of June 30, 2024 and is recorded to Other assets in our condensed consolidated balance sheet.

Covenants

The Credit Agreement contains certain affirmative and negative covenants that are binding on us and our subsidiary, Livent USA Corp., as borrowers (the "Borrowers") and their subsidiaries, including, among others, restrictions (subject to exceptions and qualifications) on the ability of the Borrowers and their subsidiaries to create liens, to undertake fundamental changes, to incur debt, to sell or dispose of assets, to make investments, to make restricted payments such as dividends, distributions or equity repurchases, to change the nature of their businesses, to enter into transactions with affiliates and to enter into certain restrictive agreements. Furthermore, the Borrowers are subject to financial covenants regarding leverage (measured as the ratio of debt to adjusted earnings) and interest coverage (measured as the ratio of adjusted earnings to interest expense). Our maximum allowable first lien leverage ratio is 3.5 as of June 30, 2024. Our minimum allowable interest coverage ratio is 3.5. We were in compliance with all requirements of the covenants as of June 30, 2024.

Debt assumed as a result of Allkem Livent Merger

The following is a summary of Allkem's indebtedness that Arcadium Lithium assumed as a result of the Allkem Livent Merger.

Project Financing Facility

Galaxy Lithium (SAL DE VIDA) S.A. ("SDV SA"), which is owned 100% by Arcadium, entered into a project financing facility with the International Finance Corporation related to the Sal de Vida development project ("Sal de Vida") in Argentina (the "Project Financing Facility"). The Project Financing Facility originally provided for a total of $180.0 million in limited recourse, sustainability-linked green project financing maturing in March 2033. On May 30, 2024, SDV SA paid the lender the outstanding principal balance of $47.0 million, a prepayment fee of $0.9 million and accrued interest and commitment fees of $1.3 million to repay the Project Financing Facility in its entirety.

Project Loan Facility

SDJ SA has a project loan facility with Mizuho Bank related to the Olaroz Plant (the "Project Loan Facility"):

•The Project Loan Facility for Stage 1 of the Olaroz Plant had an outstanding principal balance of $9.1 million as of June 30, 2024. The interest rate for the Stage 1 loan is the SOFR plus a margin of 0.80%. The interest rate related to 88.6% of the loan was hedged in 2015 with such rate currently at 4.896% until the last repayment in September 2024. Sales de Jujuy Pte Ltd has provided security in favor of Mizuho Bank over the shares it owns in SDJ SA and the Japan Organization for Metals and Energy Security, which covers 82.35% of the outstanding principal amount; and

•The Project Loan Facility for Stage 2 of the Olaroz project had an outstanding balance of $144.0 million as of June 30, 2024. The interest rate for the Stage 2 loan is a fixed rate of 2.6119% per annum until expiry in March 2029.

As of June 30, 2024, Arcadium had restricted cash of $24.6 million on deposit with Mizuho as collateral for the Project Loan Facility and classified within Other non-current assets in its condensed consolidated balance sheet.

As of June 30, 2024, Arcadium has reserved $108.0 million of its cash and cash equivalents in support of a guarantee to TTC associated with the Stage 2 Project Loan Facility for the Olaroz Plant. Arcadium would incur a 2.5% fee for permitted reductions to this reserve.

27

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Affiliate Loans With TTC

SDJ SA has eleven loans with TTC related to the Olaroz Plant originally providing for a total of $93.0 million in principal. As of June 30, 2024, the loans have an outstanding principal balance of $81.5 million and are payable ranging from July 2024 until March 2030.

Note 16: Share-based Compensation

Arcadium Lithium plc Omnibus Incentive Plan (the "Arcadium Plan")

As of June 30, 2024, there were 64,548,000 Arcadium ordinary shares authorized for issuance under the Arcadium Plan. The Arcadium Plan provides for the grant of a variety of cash and equity awards to officers, directors, employees and consultants, including share options, restricted shares, restricted share units (including performance units), share appreciation rights, and management incentive awards. The Compensation Committee of the Arcadium Board of Directors (the "Arcadium Committee") has the authority to amend the Arcadium Plan at any time, approve financial targets, award grants, establish performance objectives and conditions and the times and conditions for payment of awards.

Share options granted under the Arcadium Plan may be incentive or non-qualified share options. The exercise price for share options may not be less than the fair market value of the share at the date of grant. Awards granted under the Arcadium Plan vest or become exercisable or payable at the time designated by the Arcadium Committee. The options granted in 2024 will vest on the first, second and third anniversaries of the date of grant, subject generally to continued employment, and cost is recognized over the vesting period. Incentive and non-qualified options granted under the Arcadium Plan expire not later than 10 years from the grant date.

Under the Arcadium Plan, awards of restricted share units ("RSUs") vest over periods designated by the Arcadium Committee. The RSUs granted in 2024 to employees will vest equally on the first, second and third anniversaries of the grant date, subject generally to continued employment, and cost is recognized over the vesting period. The RSUs granted to non-employee directors in 2024 vest at the Company's next annual meeting of shareholders following the grant date. Compensation cost is recognized over the vesting periods based on the market value of Arcadium ordinary shares on the grant date of the award.

Allkem Replacement Awards

Pursuant to the Transaction Agreement, the equity awards of Allkem (including performance rights) outstanding as of immediately prior to the closing of the Allkem Livent Merger were converted into equity awards denominated in shares of Arcadium ordinary shares. The Company issued time-based vesting restricted shares in connection with the conversion of such awards. The estimated fair value of the portion of the Allkem equity awards for which the required service period had been completed at the time of the closing of the Allkem Livent Merger was treated as purchase consideration. The remaining estimated fair value is recorded as compensation expense over the remainder of the service period associated with the awards. The Allkem Replacement Awards are authorized for issuance under the Arcadium Plan.

Legacy Livent Awards

As of June 30, 2024, there were 6,579,305 Arcadium ordinary shares authorized for issuance upon the exercise or settlement of the Legacy Livent Awards.

Share Compensation

We recognized the following share compensation expense for Legacy Livent Awards and awards under the Arcadium Plan:

	Three Months Ended June 30,		Six Months Ended June 30,
(in Millions)	2024
Share Option Expense, net of taxes of $0.1 and $0.2	$	0.8	$	1.2
Restricted Share Expense, net of taxes of $0.4 and $1.1	2.7		16.8
Performance-Based Restricted Share Expense, net of taxes of zero and less than $0.1	—		0.4
Total Share Compensation Expense, net of taxes of $0.5 and $1.3 (1)	$	3.5	$	18.4

____________________ 

(1)    Gross share compensation charges of $3.5 million and $0.5 million were recorded to Selling, general and administrative expenses and Restructuring and other charges, respectively, in our condensed consolidated statements of operations for the three months

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ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

ended June 30, 2024. Gross share compensation charges of $5.7 million and $14.0 million were recorded to Selling, general and administrative expenses and Restructuring and other charges, respectively, in our condensed consolidated statements of operations for the six months ended June 30, 2024.

Share Options

The grant date fair values of the share options granted in the six months ended June 30, 2024, were estimated using the Black-Scholes option valuation model, the key assumptions for which are listed in the table below. The expected volatility assumption is based on the historical volatility of a group of ten of our publicly traded peers that operate in the specialty chemical sector. The expected life represents the period of time that options granted are expected to be outstanding. The risk-free interest rate is based on U.S. Treasury securities with terms equal to the expected timing of share option exercises as of the grant date. The dividend yield assumption reflects anticipated dividends on Arcadium's ordinary shares. Arcadium share options granted in the six months ended June 30, 2024 will vest equally on the first, second and third anniversaries of the grant date and expire ten years from the date of grant.

The following summary shows Black Scholes valuation assumptions for Arcadium Plan share options granted in 2024: 

	Six months ended June 30, 2024
Grant date	3/6/2024	5/14/2024	6/28/2024
Expected dividend yield	—%	—%	—%
Expected volatility	31.18%	31.97%	33.00%
Expected life (in years)	6.0	6.0	6.0
Risk-free interest rate	4.08%	4.41%	4.28%

The weighted-average grant date fair value of share options granted during the six months ended June 30, 2024 was $1.92 per share.

The following summary shows share option activity for the Allkem Livent Merger and the Arcadium Plan for the six months ended June 30, 2024:

	Number of Options Granted But Not Exercised	Weighted-Average Remaining Contractual Life (in Years)	Weighted-Average Exercise Price Per Share		Aggregate Intrinsic Value (in Millions)
Outstanding December 31, 2023	5,060,687	5.6 years	$	6.73	$	6.5
Granted	3,877,317		$	4.92
Exercised	(53,056)		$	4.05	$	—
Forfeited	(2,610)		$	9.70
Outstanding at June 30, 2024	8,882,338	7.1	$	5.96	$	0.1
Exercisable at June 30, 2024	4,136,405	4.5	$	6.25	$	0.1

As of June 30, 2024, we had total remaining unrecognized compensation cost related to unvested share options of $7.8 million which will be amortized over the weighted-average remaining requisite service period of approximately 2.6 years.

Restricted Share Unit Awards

The grant date fair value of RSUs under the Arcadium Plan is based on the market price per share of Arcadium's ordinary shares on the date of grant, and the related compensation cost is amortized to expense on a straight-line basis over the vesting period during which the employees perform related services, which for the RSUs granted during the six months ended June 30, 2024, will vest equally on the first, second and third anniversaries of the grant date.

29

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Pursuant to the Transaction Agreement, on the Acquisition Date, 927,510 employee RSUs vested on an accelerated pro rata basis. The following table shows RSU activity for the Allkem Livent Merger and the Arcadium Plan for the six months ended June 30, 2024:

	Restricted Share Units
	Number of awards	Weighted-Average Grant Date Fair Value		Aggregate Intrinsic Value (in Millions)
Nonvested December 31, 2023	2,287,088	$	7.83	$	17.1
Granted (1)	3,868,888	$	5.44
Vested (2)	(1,869,675)	$	7.19
Nonvested June 30, 2024	4,286,301	$	5.95	$	14.4

___________________

1.The Company granted 1,080,825 Allkem Replacement Awards on January 12, 2024 pursuant to the Transaction Agreement.

2.Immediately prior to the Acquisition Date, 768,440 non-employee Director RSUs vested and were paid out in cash of $5.3 million pursuant to the Transaction Agreement.

As of June 30, 2024, the Arcadium Plan had total remaining unrecognized compensation cost related to unvested RSUs of $17.9 million which will be amortized over the weighted-average remaining requisite service period of approximately 2.4 years.

Performance-Based Restricted Share Unit ("PRSU") Awards

Pursuant to the Transaction Agreement, on the Acquisition Date, 96,885 employee PRSUs vested on an accelerated basis at the higher of the PRSU payout on the accelerated vest date, which was —%, or 100%. The following table shows PRSU activity for the six months ended June 30, 2024.

	Performance-Based Restricted Share Units
	Number of awards	Weighted-Average Grant Date Fair Value		Aggregate Intrinsic Value (in Millions)
Nonvested as of December 31, 2023	96,885	$	9.42	$	0.7
Vested	(96,885)	$	9.42
Nonvested as of June 30, 2024	—	$	—	$	—

Note 17: Equity

After the closing of the Allkem Livent Merger on January 4, 2024 and as of June 30, 2024, we had 5 billion ordinary shares of $1.00 par value each and 125 million preferred shares of $1.00 par value each authorized. The following is a summary of Arcadium's ordinary shares issued and outstanding:

	Issued	Treasury	Outstanding
Balance as of December 31, 2023 (1)	433,059,946	(263,669)	432,796,277
Issued to Allkem shareholders - Allkem Livent Merger	641,337,840	—	641,337,840
PRSU and RSU awards accelerated - Allkem Livent Merger	648,969	—	648,969
Arcadium RSU awards	155,706	—	155,706
Arcadium share option awards	8,497	—	8,497
Net sales of treasury shares - Arcadium NQSP	—	766	766
Balance as of June 30, 2024	1,075,210,958	(262,903)	1,074,948,055

_____________________

1.Balances outstanding as of December 31, 2023, representing predecessor Livent, have been adjusted to reflect the 2.406 Exchange Ratio.

30

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Accumulated other comprehensive loss

Summarized below is the roll forward of accumulated other comprehensive loss, net of tax.

(in Millions)	Foreign currency adjustments		Derivative Instruments		Total
Accumulated other comprehensive loss, net of tax as of December 31, 2023	$	(49.8)	$	—	$	(49.8)
Other comprehensive (losses)/income before reclassifications	(30.5)		0.3		(30.2)
Accumulated other comprehensive loss, net of tax as of June 30, 2024	$	(80.3)	$	0.3	$	(80.0)

(in Millions)	Foreign currency adjustments		Derivative Instruments		Total
Accumulated other comprehensive loss, net of tax as of December 31, 2022	$	(51.0)	$	—	$	(51.0)
Other comprehensive income before reclassifications	0.5		0.6		1.1
Accumulated other comprehensive loss, net of tax as of June 30, 2023	$	(50.5)	$	0.6	$	(49.9)

Dividends

For the three and six months ended June 30, 2024 and 2023, we paid no dividends. We do not expect to pay any dividends in the foreseeable future.

Note 18: Earnings Per Share

Earnings per ordinary share ("EPS") is computed by dividing net income by the weighted average number of common shares outstanding during the period on a basic and diluted basis.

Our potentially dilutive securities include potential ordinary shares related to our share options, restricted share units and 2025 Notes. See Note 12 to our consolidated financial statements in Part II, Item 8 of our 2023 Annual Report on Form 10-K for more information. Diluted earnings per share ("Diluted EPS") considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential ordinary shares would have an anti-dilutive effect. Diluted EPS excludes the impact of potential ordinary shares related to our share options in periods in which the option exercise price is greater than the average market price of our ordinary shares for the period. We use the if-converted method when calculating the potential dilutive effect, if any, of our 2025 Notes.

Earnings applicable to ordinary shares and ordinary shares used in the calculation of basic and diluted earnings per share are as follows:

(in Millions, Except Share and Per Share Data)	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023 (1)		2024		2023 (1)
Numerator:
Net income attributable to Arcadium Lithium plc	$	85.7	$	90.2	$	101.3	$	205.0
Denominator:
Weighted average ordinary shares outstanding - basic	1,074.9		432.3		1,064.2		432.2
Dilutive share equivalents from share-based plans	0.9		3.9		1.0		3.8
Dilutive share equivalents from 2025 Notes	67.7		67.7		67.7		67.7
Weighted average ordinary shares outstanding - diluted	1,143.5		503.9		1,132.9		503.7
Basic earnings per ordinary share	$	0.08	$	0.21	$	0.10	$	0.47
Diluted earnings per ordinary share	$	0.07	$	0.18	$	0.09	$	0.41

_____________________

1.For the three and six months ended June 30, 2023, weighted average ordinary shares outstanding - basic and diluted, dilutive share equivalents and basic and diluted earnings per ordinary share amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio.

31

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Anti-dilutive share options

For the three and six months ended June 30, 2024, options to purchase 7,529,226 shares of our ordinary shares, at an average exercise price of $6.36 per share, were anti-dilutive and not included in the computation of diluted earnings per share because the exercise price of the options was greater than the average market price of the ordinary shares for the three and six months ended June 30, 2024. For the three and six months ended June 30, 2023, options to purchase 2,611 shares of our ordinary shares, at an average exercise price of $9.70 per share were anti-dilutive and not included in the computation of diluted earnings per share because the exercise price of the options was greater than the average market price of the ordinary shares for the three and six months ended June 30, 2023.

Note 19: Financial Instruments, Risk Management and Fair Value Measurements     

Our financial instruments include cash and cash equivalents, trade receivables, other current assets, investments held in trust fund, trade payables, derivatives and amounts included in accruals meeting the definition of financial instruments. Investments in the Arcadium NQSP deferred compensation plan trust fund are considered Level 1 investments based on readily available quoted prices in active markets for identical assets. The carrying value of cash and cash equivalents, trade receivables, other current assets, and trade payables approximates their fair value due to their short-term nature and are considered Level 1 investments. Our other financial instruments include the following:

Financial Instrument	Valuation Method
Foreign exchange forward contracts	Estimated amounts that would be received or paid to terminate the contracts at the reporting date based on current market prices for applicable currencies.

The estimated fair value of our foreign exchange forward contracts has been determined using standard pricing models which take into account the present value of expected future cash flows discounted to the balance sheet date. These standard pricing models utilize inputs derived from, or corroborated by, observable market data such as currency and commodity spot and forward rates.

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). The inputs used to measure fair value are classified into the following hierarchy:

Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2 - Unadjusted quoted prices in active markets for similar assets or liabilities, or unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability.

Level 3 - Unobservable inputs for the asset or liability.

The estimated fair value and the carrying amount of debt were $747.6 million and $634.0 million, respectively, as of June 30, 2024. Our 2025 Notes are classified as Level 2 in the fair value hierarchy.

Use of Derivative Financial Instruments to Manage Risk

We mitigate certain financial exposures connected to currency risk through a program of risk management that includes the use of derivative financial instruments. We enter into foreign exchange forward contracts to reduce the effects of fluctuating foreign currency exchange rates.

We formally document all relationships between hedging instruments and hedged items, as well as the risk management objective and strategy for undertaking various hedge transactions. This process includes relating derivatives that are designated as fair value or cash flow hedges to specific assets and liabilities on the balance sheet or to specific firm commitments or forecasted transactions. We also assess both at the inception of the hedge and on an ongoing basis, whether each derivative is highly effective in offsetting changes in fair values or cash flows of the hedged item. If we determine that a derivative is not highly effective as a hedge, or if a derivative ceases to be a highly effective hedge, we discontinue hedge accounting with respect to that derivative prospectively.

32

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Foreign Currency Exchange Risk Management

We conduct business in many foreign countries, exposing earnings, cash flows, and our financial position to foreign currency risks. The majority of these risks arise as a result of foreign currency transactions. The primary currencies for which we have exchange rate exposure are the Euro, the British pound, the Chinese yuan, the Argentine peso, the Australian dollar, the Canadian dollar and the Japanese yen. We currently do not hedge foreign currency risks associated with the Argentine peso due to the limited availability and the high cost of suitable derivative instruments. Our policy is to minimize exposure to adverse changes in currency exchange rates. This is accomplished through a controlled program of risk management that could include the use of foreign currency debt and forward foreign exchange contracts. We also use forward foreign exchange contracts to hedge firm and highly anticipated foreign currency cash flows, with an objective of balancing currency risk to provide adequate protection from significant fluctuations in the currency markets.

Concentration of Credit Risk

Our counterparties to derivative contracts are primarily major financial institutions. We limit the dollar amount of contracts entered into with any one financial institution and monitor counterparties’ credit ratings. We also enter into master netting agreements with each financial institution, where possible, which helps mitigate the credit risk associated with our financial instruments. While we may be exposed to credit losses due to the nonperformance of counterparties, we consider this risk remote.

Accounting for Derivative Instruments and Hedging Activities

Cash Flow Hedges

We recognize all derivatives on the balance sheet at fair value. On the date we enter into the derivative instrument, we generally designate the derivative as a hedge of the variability of cash flows to be received or paid related to a forecasted transaction (cash flow hedge). We record in accumulated other comprehensive loss ("AOCL") changes in the fair value of derivatives that are designated as and meet all the required criteria for, a cash flow hedge. We then reclassify these amounts into earnings as the underlying hedged item affects earnings. In contrast, we immediately record in earnings changes in the fair value of derivatives that are not designated as cash flow hedges. As of June 30, 2024, we had open foreign currency forward contracts in AOCL in a net after-tax gain position of $0.4 million designated as cash flow hedges of underlying forecasted sales and purchases. As of June 30, 2024, we had open forward contracts with various expiration dates to buy, sell or exchange foreign currencies with a U.S. dollar equivalent of approximately $22.4 million.

A net after-tax gain of $0.4 million, representing open foreign currency exchange contracts, will be realized in earnings during the year ending December 31, 2024 if spot rates in the future are consistent with market rates as of June 30, 2024. The actual effect on earnings will be dependent on the actual spot rates when the forecasted transactions occur. We recognize derivative gains and losses in the Cost of sales line in the condensed consolidated statements of operations.

Derivatives Not Designated As Cash Flow Hedging Instruments

We hold certain forward contracts that have not been designated as cash flow hedging instruments for accounting purposes. Contracts used to hedge the exposure to foreign currency fluctuations associated with certain monetary assets and liabilities are not designated as cash flow hedging instruments and changes in the fair value of these items are recorded in earnings.

We had open forward contracts not designated as cash flow hedging instruments for accounting purposes with various expiration dates to buy, sell or exchange foreign currencies with a U.S. dollar equivalent of approximately $101.6 million as of June 30, 2024.

33

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Fair Value of Derivative Instruments

The following table provides the gross fair value and net balance sheet presentation of our derivative instruments. The Company had no open derivative cash flow hedge contracts as of December 31, 2023.

	June 30, 2024
	Gross Amount of Derivatives
(in Millions)	Designated as Cash Flow Hedges
Derivative assets
Foreign exchange contracts	$	0.4
Total derivative assets (1)	0.4
Net derivative assets	$	0.4

__________________

1.Net balance is included in Prepaid and other current assets in the condensed consolidated balance sheets.

The following tables summarize the gains or losses related to our cash flow hedges and derivatives not designated as cash flow hedging instruments.

Derivatives in Cash Flow Hedging Relationships

(in Millions)	Total Foreign Exchange Contracts
Accumulated other comprehensive income, net of tax as of December 31, 2023	$	—
Unrealized hedging gains, net of tax	0.2
Total derivatives instruments impact on comprehensive income, net of tax	0.2
Accumulated other comprehensive income, net of tax as of March 31, 2024	$	0.2
Unrealized hedging gains, net of tax	0.1
Total derivatives instruments impact on comprehensive income, net of tax	0.1
Accumulated other comprehensive income, net of tax at June 30, 2024	$	0.3

(in Millions)	Total Foreign Exchange Contracts
Accumulated other comprehensive income, net of tax as of December 31, 2022	$	—
Unrealized hedging gains, net of tax	0.2
Total derivatives instruments impact on comprehensive income, net of tax	0.2
Accumulated other comprehensive income, net of tax as of March 31, 2023	$	0.2
Unrealized hedging gains, net of tax	0.4
Total derivatives instruments impact on comprehensive income, net of tax	0.4
Accumulated other comprehensive income, net of tax at June 30, 2023	$	0.6

34

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Derivatives Not Designated as Cash Flow Hedging Instruments

	Location of Gain or (Loss) Recognized in Income on Derivatives	Amount of Pre-tax Gain or (Loss)  Recognized in Income on Derivatives (1)
		Three Months Ended June 30,				Six Months Ended June 30,
(in Millions)		2024		2023		2024		2023
Foreign Exchange contracts	Other gain/(loss)	$	2.5	$	(0.2)	$	13.1	$	1.9
Total		$	2.5	$	(0.2)	$	13.1	$	1.9

____________________

1.Amounts represent the gain or loss on the derivative instrument offset by the gain or loss on the hedged item.

Fair Value Measurements

Recurring Fair Value Measurements

The following tables present our fair-value hierarchy for those assets and liabilities measured at fair-value on a recurring basis in our condensed consolidated balance sheets.

(in Millions)	June 30, 2024		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in deferred compensation plan (1)	$	6.3	$	6.3	$	—	$	—
JEMSE Receivable	5.0		—		—		5.0
Equity securities (2)	1.8		1.8		—		—
Derivatives – Foreign exchange	0.4		—		0.4		—
Total Assets	$	13.5	$	8.1	$	0.4	$	5.0
Liabilities
Deferred compensation plan obligation (3)	$	7.2	$	7.2	$	—	$	—
Total Liabilities	$	7.2	$	7.2	$	—	$	—

35

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

(in Millions)	December 31, 2023		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in deferred compensation plan (1)	$	4.1	$	4.1	$	—	—
Total Assets	$	4.1	$	4.1	$	—	$	—
Liabilities
Deferred compensation plan obligation (3)	$	6.7	$	6.7	$	—	$	—
Total Liabilities (4)	$	6.7	$	6.7	$	—	$	—

____________________

1.Balance is included in Investments in the condensed consolidated balance sheets. Arcadium NQSP investments in Arcadium ordinary shares are recorded as Treasury shares in the condensed consolidated balance sheets and carried at historical cost. Mark-to-market gains of $0.3 million and $1.1 million were recorded for the three and six months ended June 30, 2024, respectively. Mark-to-market losses of $0.6 million and $0.8 million were recorded for the three and six months ended June 30, 2023, related to the Arcadium ordinary shares. The mark-to-market gains and losses were recorded in Selling, general and administrative expenses in the condensed consolidated statements of operations, with a corresponding offset to the deferred compensation plan obligation in the condensed consolidated balance sheets.

2.Mark-to-market gains and losses are recorded to Other gain/loss in the condensed consolidated statement of operations.

3.Balance is included in Other long-term liabilities in the condensed consolidated balance sheets.

4.The Company had no open cash flow hedge contracts as of December 31, 2023.

Note 20: Commitments and Contingencies

Contingencies

We are a party to various legal proceedings, certain of these matters are discussed below. Arcadium records liabilities for estimated losses from contingencies when information available indicates that a loss is probable and the amount of the loss, or range of loss, can be reasonably estimated. As additional information becomes available, management adjusts its assessments and estimates. Legal costs are expensed as incurred.

In addition to the legal proceedings noted below, we have certain contingent liabilities arising in the ordinary course of business. Some of these contingencies are known but are so preliminary that the merits cannot be determined, or if more advanced, are not deemed material based on current knowledge; and some are unknown - for example, claims with respect to which we have no notice or claims which may arise in the future from products sold, guarantees or warranties made, or indemnities provided. Therefore, we are unable to develop a reasonable estimate of our potential exposure of loss for these contingencies, either individually or in the aggregate, at this time. There can be no assurance that the outcome of these contingencies will be favorable, and adverse results in certain of these contingencies could have a material adverse effect on the consolidated financial position, results of operations in any one reporting period, or liquidity.

Argentine Customs & Tax Authority Matters

Minera del Altiplano SA, our subsidiary in Argentina ("MdA"), has received notices from the Argentine Customs Authorities that they are conducting customs audits in Salta (for 2015 to 2019, 2021 and 2022), Rosario (for 2016 and 2017), Buenos Aires and Ezeiza (for 2018, 2019, 2021 and 2022) regarding the export of lithium carbonate by MdA from each of those locations. See Note 21 for more information about the payment the Company made in June 2023 for export duties and interest claimed by the Customs Authorities of Buenos Aires, Ezeiza and Salta related to exports made between the years 2018 – 2022.

Sales de Jujuy S.A., our subsidiary in Argentina ("SDJ SA") has received a notice from the Argentine Customs Authority regarding custom duties for the export of lithium carbonate by SDJ SA from January 2022 through August 2023.

SDJ SA also received notification from Jujuy provincial tax authority regarding a royalty adjustment in favor of the Province for the periods 2021 and 2022.

A range of reasonably possible liabilities, if any, cannot be currently estimated by the Company.

36

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

MdA was also notified from the Argentine Tax Authority of the start of transfer pricing audits for the periods 2017 and 2018. SDJ SA was also notified by the Argentine Tax Authority of the start of a transfer pricing audit for the period of 2018.

In January, 2023, the Argentina Ministry of Economy issued a resolution to cancel an export rebate regime relating to lithium products, which was followed by Presidential Decree No. 57/2023 in February, 2023. The Presidential Decree prospectively cancels all export rebates for lithium products. Prior to the Presidential Decree, MdA had the right to collect 4% of the FOB value for exported products (which consisted of the "La Puna" rebate which was 2.5% and the "Export" rebate which was 1.5%). In October 2023 by Presidential Decree No. 557/2023 the Export rebate of 1.5% was reinstated. Subsequent to the Presidential Decree entering into force on October 26, 2023 MdA is entitled to the 1.5% rebate/refund on FOB value of its exported products. As of June 30, 2024, MdA has a receivable of approximately $4.5 million USD which is still valid and remains in force after the Presidential Decrees.

A range of possible liabilities, if any, cannot be currently estimated by the Company.

Australia Tax Matters

We were informed on April 16, 2024 that the Australian Taxation Office will be performing a combined assurance review of Allkem Limited and its Australian subsidiaries for the period of July 1, 2019 to June 30, 2023.

Canada Tax Matters

We were notified that Nemaska Lithium has received certain audit queries from the Canada Revenue Agency ("CRA") related to the Approval and Vesting Order (the "RVO") issued under the Companies' Creditors Arrangement Act ("CCAA") on October 15, 2020, by the Superior Court of Québec. Nemaska Lithium has been responding to those queries.

Leases

All of our leases are operating leases as of June 30, 2024 and December 31, 2023. We have operating leases for corporate offices, manufacturing facilities, and land. Our leases have remaining lease terms of two to twenty-seven years.

The Company assumed an ROU asset and corresponding lease liability of $53.4 million in the Allkem Livent Merger, all of which are accounted for as operating leases.

Quantitative disclosures about our leases are summarized in the table below.

	Three Months Ended June 30,				Six Months Ended June 30,
(in Millions, except for weighted-average amounts)	2024		2023		2024		2023
Lease Cost
Operating lease cost	$	4.2	$	0.3	$	8.5	$	0.6
Short-term lease cost	0.1		0.1		0.2		0.2
Total lease cost (1)	$	4.3	$	0.4	$	8.7	$	0.8
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Cash paid for operating leases	$	3.8	$	0.4	$	8.2	$	0.7

__________________________

1.Lease expense is classified as Selling, general and administrative expenses in our condensed consolidated statements of operations.

As of June 30, 2024, our operating leases had a weighted average remaining lease term of 8.2 years and a weighted average discount rate of 8.6%.

37

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

The table below presents a maturity analysis of our operating lease liabilities for each of the next five years and a total of the amounts for the remaining years.

(in Millions)	Undiscounted cash flows
Remainder of 2024	$	7.3
2025	9.9
2026	9.1
2027	8.3
2028	8.1
Thereafter	31.1
Total future minimum lease payments	73.8
Less: Imputed interest	(19.8)
Total	$	54.0

38

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

Note 21: Supplemental Information

The following tables present details of prepaid and other current assets, other assets, accrued and other current liabilities, and other long-term liabilities as presented on the condensed consolidated balance sheets:

(in Millions)	June 30, 2024		December 31, 2023
Prepaid and other current assets
Tax related items	$	113.6	$	29.5
Prepaid expenses	66.3		16.9
Argentina government receivable (1)	15.1		7.9
Other receivables	63.6		28.2
Bank Acceptance Drafts (2)	1.2		—
Derivative assets (Note 17)	0.4		—
Other current assets	3.8		3.9
Total	$	264.0	$	86.4

(in Millions)	June 30, 2024		December 31, 2023
Other assets
Argentina government receivable (1), (3)	$	128.8	$	71.3
Advance to contract manufacturers (4)	26.1		27.6
Long-term semi-finished goods inventory	137.4		1.0
Tax related items	4.0		4.0
Capitalized software, net	1.5		1.1
Other assets	44.5		22.7
Total	$	342.3	$	127.7

_________________

1.We have various subsidiaries that conduct business in Argentina. As of June 30, 2024 and December 31, 2023, $39.3 million and $38.8 million, respectively, of outstanding receivables due from the Argentina government, which primarily represent export tax and export rebate receivables, was denominated in U.S. dollars. A recent judicial decision relating to the U.S. dollar-denominated export tax receivable portion ($34.8 million) permits the Argentina government to reimburse us in Argentine pesos at the historical foreign exchange rate applicable at each past payment date, adjusted by a bank deposit interest rate. While Arcadium filed an appeal on November 6, 2023 and believes it has valid defenses on the technical merits, the ultimate resolution of this matter could result in a possible loss of up to $34.3 million. We continually review the recoverability of all outstanding receivables by analyzing historical experience, current collection trends and regional business and political factors among other factors.

2.Bank Acceptance Drafts are a common Chinese finance note used to settle trade transactions. The Company accepts these notes from Chinese customers based on criteria intended to ensure collectability and limit working capital usage.

3.In June 2023, the Company decided to pay $21.7 million for the export duties and interest claimed by the Customs Authorities of Buenos Aires, Ezeiza and Salta related to exports made between the years 2018 – 2022 registered in those locations. This payment stops the accrual of any further interest. It was a deposit made under protest and was not an admission of any of the claims made by the Customs Authorities or a waiver of any of the Company's defenses, including recovery of the deposit plus interest. The cases remain in discussion. See Note 20 for more information.

4.We record deferred charges for certain contract manufacturing agreements which we amortize over the term of the underlying contract.

39

ARCADIUM LITHIUM PLC

Notes to the Condensed Consolidated Financial Statements (unaudited) — (Continued)

(in Millions)	June 30, 2024		December 31, 2023
Accrued and other current liabilities
Accrued payroll	$	56.3	$	31.2
Retirement liability - 401k	4.6		3.2
Environmental reserves, current	3.0		0.5
Severance	1.6		1.7
Accrued investment in unconsolidated affiliates	—		27.0
Other accrued and other current liabilities (1)	94.3		73.2
Total	$	159.8	$	136.8

(in Millions)	June 30, 2024		December 31, 2023
Other long-term liabilities
Deferred compensation plan obligation	$	7.2	$	6.7
Contingencies related to uncertain tax positions (2)	16.2		6.2
Self-insurance reserves	1.1		1.1
Asset retirement obligations	11.3		3.7
Other long-term liabilities	53.6		3.6
Total	$	89.4	$	21.3

____________________

1.Amounts primarily include accrued capital expenditures related to our expansion projects.

2.As of June 30, 2024, we have recorded a liability for uncertain tax positions of $15.8 million and a $0.4 million indemnification liability where the offsetting uncertain tax position is with FMC, per the tax matters agreement.

40

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

SPECIAL NOTE REGARDING FORWARD-LOOKING INFORMATION

Statement under the Safe Harbor Provisions of the Private Securities Litigation Reform Act of 1995: We and our representatives may from time to time make written or oral statements that are "forward-looking" and provide other than historical information, including statements contained in Item 2 of this Quarterly Report on Form 10-Q, in our other filings with the SEC, or in reports to our shareholders.

In some cases, we have identified forward-looking statements by such words or phrases as "will likely result," "is confident that," "expect," "expects," "should," "could," "may," "will continue to," "believe," "believes," "anticipates," "predicts," "forecasts," "estimates," "projects," "potential," "intends" or similar expressions identifying "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, including the negative of those words and phrases. Such forward-looking statements are based on our current views and assumptions regarding future events, future business conditions and the outlook for the Company based on currently available information. These forward-looking statements may include projections of our future financial performance, our anticipated growth strategies, anticipated trends in our business, and the anticipated timing for, and outcome and effects of, the post-merger integration of Livent and Allkem. These statements are only predictions based on our current expectations and projections about future events. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results to be materially different from any results, levels of activity, performance or achievements expressed or implied by any forward-looking statement.

Investors are cautioned to carefully consider the risk factors discussed in Part I, Item 1A of our 2023 Annual Report on Form 10-K and in Part II, Item 1A of this Quarterly Report on Form 10-Q.

Although we believe the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, level of activity, performance, achievements, or timing for, or outcome and effects of, the post-merger integration of Livent and Allkem. Moreover, neither we nor any other person assumes responsibility for the accuracy and completeness of any of these forward-looking statements. We wish to caution readers not to place undue reliance on any such forward-looking statements, which speak only as of the date made. We are under no duty to and specifically decline to undertake any obligation to publicly revise or update any of these forward-looking statements after the date of this Quarterly Report on Form 10-Q to conform our prior statements to actual results, revised expectations or to reflect the occurrence of anticipated or unanticipated events.

APPLICATION OF CRITICAL ACCOUNTING ESTIMATES

Our condensed consolidated financial statements are prepared in conformity with U.S. GAAP. The preparation of our financial statements requires management to make judgments, assumptions and estimates that affect the reported amounts of assets, liabilities, revenues and expenses and that have or could have a material impact on our financial condition and results of operations. We have described certain of our accounting estimates in Note 2 to our consolidated financial statements included in Part II, Item 8 of our 2023 Annual Report on Form 10-K. The SEC has defined critical accounting estimates as those estimates made in accordance with U.S. GAAP that involve a significant level of measurement uncertainty and have had or are reasonably likely to have a material impact on the financial condition or operating performance of a company.

We have reviewed these accounting estimates, identifying those that we believe contain matters that are inherently uncertain, have significant levels of subjectivity and complex judgments and are critical to the preparation and understanding of our condensed consolidated financial statements. We have described our critical accounting estimates in Item 7 of our 2023 Annual Report on Form 10-K. These include revenue recognition, trade and other receivables, impairments and valuation of long-lived assets and equity method investments, accounting for business combinations, and income taxes. We have reviewed these critical accounting estimates with the Audit Committee of our Board of Directors. Critical accounting estimates are central to our presentation of results of operations and financial condition and require management to make judgments, assumptions and estimates on certain matters. We base our estimates, assumptions and judgments on historical experience, current conditions and other reasonable factors. In addition to the critical accounting estimates described in our Form 10-K, we have added “Resources”, "Inventory", "Depreciation and amortization" and "Goodwill" described hereinafter.

As a result of inflation, high interest rates and various global conflicts, there has been uncertainty and disruption in the global economy and financial markets. The estimates used for, but not limited to, revenue recognition and the collectability of trade receivables, impairment and valuation of long-lived assets, and income taxes could be impacted. We have assessed the impact and are not aware of any specific events or circumstances that required an update to our estimates and assumptions or materially affected the carrying value of our assets or liabilities as of the date of issuance of this Quarterly Report on Form 10-Q. These estimates may change as new events occur and additional information is obtained. Actual results could differ materially from these estimates under different assumptions or conditions.

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OVERVIEW

Arcadium Lithium is a leading global lithium chemicals producer with a diversified product offering and enhanced business-critical scale, including a presence in three major lithium geographies (i.e., the South American "lithium triangle," Western Australia and Canada) and a lithium deposit base that is among the largest in the world. We are a pure-play, fully integrated lithium company, with a long, proven history of producing performance lithium compounds. Our primary products, namely battery-grade lithium hydroxide, lithium carbonate, spodumene, butyllithium and high purity lithium metal are critical inputs used in various performance applications.

As a result of our focus on supplying performance lithium compounds for use in the rapidly growing electric vehicle ("EV") and broader energy storage battery markets, we expect our revenue generated from lithium hydroxide and lithium carbonate, and from energy storage applications to increase over time. We also expect our revenue by geography to remain at similar proportions until supply chains further regionalize in North America and Europe. We intend to maintain our leadership positions in other high-performance markets such as non-rechargeable batteries, greases, pharmaceuticals and polymers.

We believe that we have earned a reputation as a leading supplier in the markets we serve, based on the performance of our products in our customers’ production processes and our ability to provide application know-how and technical support. In the EV market, we are one of a small number of lithium suppliers whose battery-grade lithium hydroxide has been qualified by global customers for use in their cathode material production that is ultimately used in numerous EV programs at scale. Throughout our history, as end market application technologies have evolved, we have worked closely with our customers to understand their changing performance requirements and have developed products to address their needs.

As a vertically integrated lithium producer, we benefit from operating some of the lowest cost lithium mineral deposits in the world that also have a favorable, industry leading sustainability footprint. Arcadium has been extracting lithium brine at its Fénix operations at the Salar del Hombre Muerto in Argentina for more than 25 years, and has been producing various lithium compounds for approximately 80 years. Our operational history provides us with a deep understanding of the process of extracting lithium compounds from brine safely and sustainably. We have developed proprietary process knowledge that enables us to produce high quality, low impurity lithium carbonate and lithium chloride, and helps us to produce industry leading quality downstream products. We source the majority of our lithium for use in the production of performance lithium compounds from multiple low-cost operations in Argentina. Our operations in Argentina are expandable, giving us the ability to increase our lithium carbonate and lithium chloride production to meet increasing demand. We also have a hard rock mining operation in Australia producing spodumene concentrate.

We are one of a few lithium compound producers with global manufacturing capabilities. The battery-grade lithium hydroxide in the U.S., China and Japan that we produce today uses lithium carbonate as feedstock. We use lithium chloride to produce lithium metal, a key feedstock in the production of butyllithium products in the U.S., the United Kingdom and China, as well as in the production of high purity lithium metal in the U.S. We have significant know-how and experience in lithium hydroxide, lithium carbonate, butyllithium and high purity lithium metal production processes and product applications, which we believe provide us with a competitive advantage in these markets.

Capital spending and capacity expansions

In response to current lithium market conditions, the Company has decided to defer investment in two of our four current expansion projects. The Company still sees strong long-term growth trajectory for lithium demand and is committed to developing its portfolio of expansion opportunities on a timeline that is supported by the market and customers.

Arcadium Lithium intends to pause current investment in its 40,000 metric ton lithium carbon equivalent ("LCE") spodumene Galaxy project in Canada (formerly “James Bay”) and is exploring the opportunity to bring in a partner to provide additional capital for the project in return for a long-term strategic partnership. The pause in spending will be structured to minimize both cost and timing disruption when the project is ultimately resumed.

Additionally, Arcadium Lithium is revisiting the sequencing of its combined 25,000 metric ton lithium carbonate projects at the Salar del Hombre Muerto in Argentina. Rather than execute Fénix Phase 1B and Sal de Vida Stage 1 simultaneously as previously announced, the projects will now be completed sequentially.

As a result of these actions, the Company believes it will reduce its capital spending by approximately $500 million over the next 24 months.

Li-Metal transaction

On August 2, 2024, Arcadium announced it acquired the lithium metal division of Li-Metal Corp. The all-cash $11 million USD transaction includes the intellectual property and physical assets related to lithium metal production, including a pilot production facility in Ontario, Canada.

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Arcadium Lithium uses lithium metal to manufacture specialty products, including high purity lithium metal ("HPM") and LIOVIX®, a proprietary printable lithium metal formulation, for primary battery applications and next-generation batteries. Arcadium Lithium also processes lithium metal into butyllithium, as well as other lithium specialty chemicals used in medicine, agriculture, electronics and other industries.

Merger of Allkem and Livent

On January 4, 2024, Arcadium Lithium completed the Allkem Livent Merger.

In this Form 10-Q, because Arcadium Lithium plc is the successor company to Livent in the Allkem Livent Merger which closed on January 4, 2024, we are presenting the results of predecessor Livent’s operations for the three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem. Subsequent to the closing of the Allkem Livent Merger on January 4, 2024, the financial statements of the Company presented in this Form 10-Q include the financial position and operations of Allkem. As a result of the Allkem Livent Merger, our financial information for the reporting periods after January 4, 2024, which reflect the results of operations of Allkem, will not be directly comparable to our financial information for periods prior to the Allkem Livent Merger, including the information presented in this Form 10-Q.

Segment Information

In January 2024, Arcadium Lithium completed the Allkem Livent Merger. See Note 4, Allkem Livent Merger for further details. Following the closing of the Allkem Livent Merger, we currently operate as one reportable segment based on the commonalities among our products and services. As integration evolves, we will continue to assess this determination.

Business Update

Since the closing of the Allkem Livent Merger, we have been focused on safely integrating the operations of the legacy Allkem and Livent businesses and identifying and executing on cost savings, commercial and operational synergies. This includes rationalizing office space and employee organizational structures. We are making improvements to our capital management system and process, which we believe will result in more efficient and timely capital spending decisions and outlays. This has also led us to re-evaluate our capital spending projections and future expansion timelines and production estimates. Broadly, we are attempting to have our expansion activities be supported by the cash generated from our operations over time, although that may not be possible in the short-term. We continue to harmonize different processes and reporting standards between the legacy Allkem and Livent businesses, including those used for accounting and reporting mineral resources and reserves.

We have had many years of reliable lithium production in Argentina. Nevertheless, our operations in Argentina are subject to their own unique challenges. Foreign currency reserves in Argentina remain depleted. Although the monthly rate of inflation has slowed, Argentina continues to be a highly inflationary economy with an unstable currency. It is marked by high natural gas, oil and power prices, and social, labor and political unrest. There is also financial uncertainty over the Argentina government's ability to repay large international debt obligations that are maturing in the future. Difficulties with foreign currency reserves have led to significant restrictions on foreign exchange transactions, which in turn have placed severe limits on imports, including certain materials for our operations and expansion projects. Additionally, vendor concerns regarding high inflation and the inability to restock items has resulted in increased pricing uncertainty with respect to products and equipment.

As a result of this mix of factors in Argentina, there is increasing interest and focus from federal and provincial governments to obtain additional sources of funding, such as through customs, royalties, tax revenues and other concessions from private and/or foreign companies, including from the lithium industry. The State Prosecutor of Salta recently notified us of its decision to terminate the suspension agreement with respect to the Salta Royalty Claim (as previously disclosed in Part I, Item 2, Properties, Material Individual Properties, Salar del Hombre Muerto, Mineral Concession Rights and Royalties of our 2023 Annual Report on Form 10-K) with effect as from August 9, 2024. As a result, the underlying judicial claims will resume on August 9, 2024. However, our discussions with the respective Provinces of Catamarca and Salta to resolve the Salta Royalty Claim are ongoing. There can be no assurance as to the outcome or timing of such discussions.

In addition, on June 27, 2024, the National Congress in Argentina approved the Bases and Starting Point of the Freedom of Argentines Law No. 27,742 (Ley de Bases y Puntos de Partida para la Libertad de los Argentinos) which, in addition to amending several existing laws, created the Incentive Regime for Large Investments (“RIGI”, its acronym in Spanish). This statute became effective on July 8, 2024. The RIGI is a promotional regime that is applicable to the mining sector and provides guarantees of regulatory, fiscal, customs, and exchange rate stability to projects that qualify under it for a term of 30 years from the inclusion date. The regulations to implement RIGI are still pending and, as such, Arcadium is awaiting further guidance on the scope and application of RIGI.

On June 27, 2024, the National Congress in Argentina also approved the Law No. 27,743 on “Palliative and Relevant Tax Measures” which, among other things, increased the cap on mining royalties payable to the provinces from three percent (3%)

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to five percent (5%) of the pithead value of the extracted mineral. This new 5% cap on royalties applies exclusively to mining projects that have not started construction (i.e., being at or prior to the exploitation stage) prior to the date of entry into force of this law. As such, this should not apply to our ongoing operations and expansion projects in Argentina that are being managed and developed by our subsidiaries MdA, SDV SA and SDJ SA. The provinces are expected to implement Law No. 27,743 through their own provincial laws.

In Argentina and Canada, we are currently focused on integrating and streamlining the different operations of Livent and Allkem both from a cost and production efficiency perspective. Our expansion efforts (now paused and modified as noted under "Capital spending and capacity expansions" above) progressed at a slower pace and at higher costs than originally contemplated. We are aligning our expansion efforts to match market conditions, supply chain challenges, and local labor market capabilities. Nevertheless, we intend to deliver additional volumes needed by customers within their requested timeframes. We do not expect our current expansion efforts in Argentina to be affected by the environmental impact assessment to be carried out by the Province of Catamarca that takes into account the cumulative effect of all projects in the area. Management is continuing to monitor the cumulative impact of neighboring projects and tenement claims in Argentina on our water and brine rights, existing easements, and operations. There is little legal precedent and a limited government track record on the allocation of competing rights over fluid resources such as lithium brine and water in Argentina. Management is also monitoring our levels of water use in comparison to our local competitors.

Generally, the global economy and business environment in the diverse group of markets we serve present us with various opportunities and challenges. The long-term demand for lithium products remains strong, driven by the increased adoption of EVs and other energy storage applications, providing us with the opportunity to continue to develop high performance lithium compound products and maintain our position as a leading global producer of butyllithium and high purity lithium metal. However, the current lithium market is characterized by overcapacity and overproduction, a decrease in overall demand, strong competition, vertical integration by end users, geopolitical tensions over supply chains, and certain macroeconomic headwinds, resulting in lower pricing. Nevertheless, we believe our business fundamentals are sound and that we can manage the impact on our business of fluctuating lithium prices, inflation, high energy costs and shortages, supply chain disruptions, various global conflicts and regional challenges, higher interest rates, the strength of the U.S. dollar, and the corresponding weakening of foreign currencies. Given our extensive global capabilities, vast experience in the markets we serve, and deep customer relationships, we believe we are well positioned to capitalize on future business opportunities and the accelerating trend of electrification.

Customers in the EV manufacturing industry are transitioning their businesses for continued expected growth in electrification, although at different rates around the globe. During the first half of 2024, China EV adoption as evidenced by new car sales was at record levels, and battery installations exceeded many analysts’ expectations. In China, lithium iron phosphate (LFP) cathode-based batteries and plug-in electric hybrid vehicles (PHEVs) have increased their share in the chemistry and EV mix in recent quarters. EV sales in the European Union and the United States have been below analysts' expectations during the first half of 2024, but automakers expect to launch new attractive EV models during the second half of 2024 and expect lower battery prices. Globally, EV price reductions, particularly those of a few leading automakers, will likely continue to put commercial and financial pressures on several other automakers in the world's major EV markets.

To support rising battery demand for EV and stationary storage applications in the future, cell manufacturers, cathode producers and lithium chemicals producers are adding capacity in different geographies and at different rates. The customer qualification and ramp-up of these cell, cathode, and lithium chemical lines as well as inventory in the supply chain will in turn determine overall lithium consumption. Upstream battery raw material resource development typically takes longer than capacity additions in midstream and downstream parts of the supply chain. All of these variables may continue to add volatility and uncertainty to the overall EV and battery supply chains that may adversely impact our business. This could cause delays in our customers' demand for our high-performance lithium compounds, adversely impacting our business and growth plans.

The material matters that management is currently monitoring are: integration activities related to the Allkem Livent Merger, costs, the pace and scope of our ongoing expansion projects and those that we decide to pause; political and economic developments in Argentina, the United States, England and other places where we do business; the supply and demand balance of battery-grade and total lithium compounds in the global marketplace; lithium market prices and the impact lower prices may have on earnings and investment opportunities; our marginal costs of production; inflation, interest rates and fluctuating foreign currency exchange rates, and the negative impact they may have on our operations, customers (and their attempts at vertical integration and/or preferences for suppliers) and key end markets such as electric vehicles; global supply chain and logistics issues, and our ability to deliver products and receive key inputs; the impact of the IRA on the Company and customer demand; global energy supply concerns and prices; the potential economic and geopolitical consequences of various global conflicts; the pricing, economic demand and geopolitical impact of tariffs in the United States, Europe and elsewhere on EVs and other products; the effects of climate change, including climate events such as wildfires, droughts and rain near or impacting our

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operations, insurance premiums, and ESG compliance costs and reporting requirements; community relations near our operations; and, the potential for cybersecurity breaches.

2024 Business Outlook

For the combined business, we expect increased volumes sold versus the prior year, driven by the ramp up of new production capacity in the second half of the year. This results in higher lithium carbonate and lithium hydroxide sales, which is offset by lower spodumene concentrate sales due to reduced production at Mt. Cattlin in 2024. Our outlook for the remainder of 2024 depends to a significant extent on the market prices of our lithium products, which declined substantially in the fourth quarter of 2023 and remain below the full 2023 fiscal year average and have declined further recently. This uncertainty is balanced in part by pricing mechanisms on a portion of our existing volumes under commercial agreements. We also expect increased costs versus the prior year, with higher costs from the ramping up of new production units offset by synergy and cost saving initiatives.

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The following Management Discussion and Analysis includes the results of predecessor Livent’s operations for three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem.

RESULTS OF OPERATIONS

	Three Months Ended June 30,								Six Months Ended June 30,
	2024						2023 (1)		2024						2023 (1)
	Livent		Allkem		Arcadium				Livent		Allkem		Arcadium
(in Millions)	(unaudited)
Revenue	$	170.7	$	83.8	$	254.5	$	235.8	$	329.4	$	186.3	$	515.7	$	489.3
Cost of sales	98.9		75.2		174.1		88.5		186.1		142.8		328.9		174.8
Gross margin	71.8		8.6		80.4		147.3		143.3		43.5		186.8		314.5
Selling, general and administrative expenses	20.5		(5.0)		15.5		17.6		37.6		17.8		55.4		33.9
Research and development expenses	1.1		0.4		1.5		1.0		2.2		0.4		2.6		2.0
Restructuring and other charges	5.5		16.4		21.9		24.3		75.1		26.6		101.7		26.3
Total costs and expenses	126.0		87.0		213.0		131.4		301.0		187.6		488.6		237.0
Income/(loss) from operations before equity in net loss of unconsolidated affiliate, interest income, net, loss on debt extinguishment and other gains	44.7		(3.2)		41.5		104.4		28.4		(1.3)		27.1		252.3
Equity in net loss of unconsolidated affiliate	—		—		—		7.2		—		—		—		15.3
Interest expense/(income), net	0.4		(9.7)		(9.3)		—		1.4		(21.7)		(20.3)		—
Loss on debt extinguishment	—		0.9		0.9		—		0.2		0.9		1.1		—
Other gains	(9.7)		(70.2)		(79.9)		(7.6)		(24.5)		(132.7)		(157.2)		(6.5)
Income from operations before income taxes	54.0		75.8		129.8		104.8		51.3		152.2		203.5		243.5
Income tax expense					35.3		14.6						89.1		38.5
Net income					94.5		90.2						114.4		205.0
Net income attributable to noncontrolling interests					8.8		—						13.1		—
Net income attributable to Arcadium Lithium plc					$	85.7	$	90.2					$	101.3	$	205.0

_____________________

1.Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem.

In addition to net income attributable to Arcadium Lithium plc, as determined in accordance with U.S. GAAP, we evaluate operating performance using certain Non-GAAP measures such as EBITDA, which we define as net income attributable to Arcadium Lithium plc plus noncontrolling interests, interest income, net, income tax expense, and depreciation and amortization; and Adjusted EBITDA, which we define as EBITDA adjusted for Argentina remeasurement losses, restructuring and other charges, Allkem Livent Merger inventory-related step-up, nonrecurring Blue Chip Swap gains and other losses/(gains). Management believes the use of these Non-GAAP measures allows management and investors to compare more easily the financial performance of its underlying business from period to period. The Non-GAAP information provided may not be comparable to similar measures disclosed by other companies because of differing methods used by other companies in calculating EBITDA and Adjusted EBITDA. These measures should not be considered as a substitute for net income or other measures of performance or liquidity reported in accordance with U.S. GAAP. The following table reconciles EBITDA and Adjusted EBITDA from net income attributable to Arcadium Lithium plc.

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	Three Months Ended June 30,								Six Months Ended June 30,
	2024						2023 (1)		2024						2023 (1)
	Livent		Allkem		Arcadium				Livent		Allkem		Arcadium
(in Millions)	(unaudited)
Income from operations before income taxes	$	54.0	$	75.8	$	129.8	$	104.8	$	51.3	$	152.2	$	203.5	$	243.5
Add back:
Interest expense/(income), net	0.4		(9.7)		(9.3)		—		1.4		(21.7)		(20.3)		—
Depreciation and amortization	12.6		11.7		24.3		7.0		23.5		18.0		41.5		13.8
EBITDA (Non-GAAP)	67.0		77.8		144.8		111.8		76.2		148.5		224.7		257.3
Add back:
Argentina remeasurement (gains)/losses (a)	(1.8)		(55.8)		(57.6)		4.8		(4.4)		(91.8)		(96.2)		8.9
Restructuring and other charges (b)	5.5		16.4		21.9		24.3		75.1		26.6		101.7		26.3
Loss on debt extinguishment (c)	—		0.9		0.9		—		0.2		0.9		1.1		—
Inventory step-up, Allkem Livent Merger (d)	—		4.7		4.7		—		—		20.5		20.5		—
Other losses/(gains) (e)	2.4		(1.2)		1.2		5.0		3.5		(10.9)		(7.4)		10.8
Subtract:							—				.
Blue Chip Swap gain (f)	(6.4)		(10.4)		(16.8)		(11.4)		(17.8)		(18.7)		(36.5)		(11.4)
Adjusted EBITDA (Non-GAAP)	$	66.7	$	32.4	$	99.1	$	134.5	$	132.8	$	75.1	$	207.9	$	291.9

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1.Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem.

a.Represents impact of currency fluctuations primarily on deferred income tax assets and liabilities. Also includes impact of currency fluctuations on other tax assets and liabilities and on long-term monetary assets associated with our capital expansion as well as foreign currency devaluations. The remeasurement losses are included within Other gains in our condensed consolidated statements of operations but are excluded from our calculation of Adjusted EBITDA because of: i.) their nature as income tax related; ii.) their association with long-term capital projects which will not be operational until future periods; or iii.) the severity of the devaluations and their immediate impact on our operations in the country.

b.We continually perform strategic reviews and assess the return on our business. This sometimes results in management changes or in a plan to restructure the operations of our business. As part of these restructuring plans, demolition costs and write-downs of long-lived assets may occur. The three months ended June 30, 2024 and 2023 include costs related to the Transaction of $19.8 million and $18.8 million, respectively. The six months ended June 30, 2024 and 2023 include costs related to the Transaction of $86.8 million and $18.8 million, respectively. The six months ended June 30, 2024 and 2023 include severance-related costs of $14.1 million and $2.4 million, respectively (see Note 11 for more information).

c.The three months ended June 30, 2024 represents a prepayment fee incurred when the Sal de Vida Project Financing Facility was repaid in its entirety by SDJ SA on May 30, 2024. The six months ended June 30, 2024 also includes $0.2 million for the partial write-off of deferred financing costs for amendments to the Revolving Credit Facility. The debt extinguishment losses are excluded from our calculation of Adjusted EBITDA because the loss is nonrecurring.

d.Relates to the step-up in inventory recorded for Allkem Livent Merger for the three and six months ended June 30, 2024 as a result of purchase accounting, excluded from Adjusted EBITDA as the step-up is considered a one-time, non-recurring cost.

e.The three and six months ended June 30, 2024 primarily represents foreign currency remeasurement gains related to U.S. dollar-denominated cash balances temporarily held at a foreign currency-functional subsidiary. The three and six months ended June 30, 2023, prior to consolidation of Nemaska Lithium Inc. ("NLI") on October 18, 2023, represents our 50% ownership interest in costs incurred for certain project-related costs to align NLI's reported results with Arcadium's capitalization policies and interest expense incurred by NLI, all included in Equity in net loss of unconsolidated affiliate in our condensed consolidated statements of operations. The Company consolidates NLI on a one-quarter lag basis and prior to October 18, 2023, accounted for its equity method investment in NLI on a one-quarter lag basis (see Note 9 for more information).

f.Represents non-recurring gain from the sale in Argentina pesos of Argentina Sovereign U.S. dollar-denominated bonds due to the divergence of Argentina's Blue Chip Swap market exchange rate from the official rate.

Three Months Ended June 30, 2024 Compared to Three Months Ended June 30, 2023

Revenue    

Revenue of $254.5 million for the three months ended June 30, 2024 (the "2024 Quarter") increased by approximately 8%, or $18.7 million, compared to $235.8 million for the three months ended June 30, 2023 (the "2023 Quarter") primarily due to revenues contributed by Allkem post-merger of $83.8 million and higher volume of $27.9 million primarily driven by lithium carbonate partially offset by lower pricing across all legacy Livent products of $92.2 million.

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Gross margin

Gross margin of $80.4 million for the 2024 Quarter decreased by $66.9 million, or approximately 45.4%, versus $147.3 million for the 2023 Quarter. The decrease in gross margin was primarily due to the impact of lower pricing across all legacy Livent products of $92.2 million and higher operating costs of $8.2 million partially offset by higher volumes of $24.9 million primarily driven by lithium carbonate and the impact from Allkem post-merger of $8.6 million.

Selling, general and administrative expenses

Selling, general and administrative expenses of $15.5 million for the 2024 Quarter decreased by $2.1 million, or approximately 12% versus $17.6 million for the 2023 Quarter. The decrease in selling, general and administrative expenses was primarily due to the reclassification of first quarter 2024 costs in the second quarter of 2024 to other income statement line items to align legacy Allkem financial reporting with Arcadium's accounting policies as integration activities continue. This was partially offset by an increase of $4.2 million related to consolidation of Nemaska Lithium on a one-quarter lag basis in the 2024 Quarter.

Restructuring and other charges

Restructuring and other charges of $21.9 million for the 2024 Quarter decreased by $2.4 million versus $24.3 million for the 2023 Quarter. Restructuring and other charges for the 2024 Quarter primarily consisted of $19.8 million of costs related to the Allkem Livent Merger, and $3.2 million severance related charges. 2023 Quarter Restructuring and other charges consisted primarily of costs related to the Allkem Livent Merger of $18.8 million and the Bessemer City plant fire loss of $5.0 million (see Note 11 for details).

Equity in net loss of unconsolidated affiliate

Equity in net loss of unconsolidated affiliate of zero and $7.2 million for the 2024 Quarter and 2023 Quarter, respectively, arises out of our ownership interest in the Nemaska Lithium Project, which is 50%. Nemaska Lithium was consolidated on a quarter-lag basis for the 2024 Quarter and was accounted for as an equity method investment for the 2023 Quarter. The $7.2 million for the 2023 Quarter represents Arcadium's 50% share of project-related costs incurred by the Nemaska Lithium Project for continuing construction of the lithium hydroxide conversion plant in Bécancour, Québec (see Note 9 for details).

Income tax expense

The increase in income tax expense to $35.3 million for the 2024 Quarter resulting in an effective tax rate of 27.2% compared to the income tax expense of $14.6 million resulting in an effective tax rate of 13.9% for the 2023 Quarter, was primarily due to an increase in fluctuations in foreign currency impacts in Argentina of $9.5 million and $(3.0) million for the 2024 Quarter and 2023 Quarter, respectively. The increase in fluctuations in foreign currency impacts in Argentina for the 2024 Quarter of $9.5 million was partially offset by changes in valuation allowance on the net deferred tax assets in Argentina of $(0.9) million, primarily relating to the fluctuations in foreign currency impacts in Argentina. In addition, the increase in income tax expense is due to an increase in forecasted jurisdictional mix of earnings where the statutory rate is higher than the U.S. federal statutory rate.

Net income

Net income of $94.5 million for the 2024 Quarter increased $4.3 million, or approximately 4.8%, versus $90.2 million for the 2023 Quarter. The increase was primarily due to lower gross margin of $66.9 million, higher income taxes of $20.7 million and loss on debt extinguishment related to repayment of the Sal de Vida Project Financing Facility, partially offset by gains from our sale of Argentina Sovereign U.S. dollar-denominated bonds, foreign currency remeasurement gains, interest income, net in the 2024 Quarter and Equity in net loss of unconsolidated affiliate in the 2023 Quarter.

Adjusted EBITDA

Adjusted EBITDA of $99.1 million for the three months ended June 30, 2024 decreased $35.4 million, compared to $134.5 million for the three months ended June 30, 2023, primarily due to the impact of lower pricing across all legacy Livent products of $92.2 million and higher costs of $2.1 million excluding depreciation, partially offset by higher volumes of $24.9 million primarily driven by lithium carbonate and the impact from Allkem post-merger of $32.4 million.

Six Months Ended June 30, 2024 Compared to Six Months Ended June 30, 2023

Revenue    

Revenue of $515.7 million for the six months ended June 30, 2024 (the "2024 YTD") increased by approximately 5.4%, or $26.4 million, compared to $489.3 million for the six months ended June 30, 2023 (the "2023 YTD") primarily due to

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revenues contributed by Allkem post-merger of $186.3 million and higher volumes of $2.7 million primarily driven by lithium carbonate volumes which are partially offset by lower pricing across all legacy Livent products of $161.7 million

Gross margin

Gross margin of $186.8 million for the 2024 YTD decreased by $127.7 million, or approximately 41%, versus $314.5 million for the 2023 YTD. The decrease in gross margin was primarily due to the impact of lower pricing across all legacy Livent products of $161.7 million as well as higher operating costs of $24.9 million, partially offset by higher volumes of $15.4 million primarily driven by lithium carbonate and impact from Allkem post-merger of $43.5 million.

Selling, general and administrative expenses

Selling, general and administrative expenses of $55.4 million for the 2024 YTD increased by $21.5 million, or approximately 63.4% versus $33.9 million for the 2023 YTD. The increase in selling, general and administrative expenses was primarily due to impact from Allkem post-merger of $17.8 million and $8.3 million related to consolidation of Nemaska Lithium on a one-quarter lag basis in the 2024 Quarter partially offset by $2.5 million lower employee costs.

Restructuring and other charges

Restructuring and other charges of $101.7 million for the 2024 YTD increased by $75.4 million versus $26.3 million for the 2023 YTD. Restructuring and other charges for the 2024 YTD primarily consisted of $86.8 million of costs related to the Allkem Livent Merger, and $14.1 million severance related charges. 2023 YTD Restructuring and other charges consisted primarily of costs related to the Allkem Livent Merger of $18.8 million and the Bessemer City plant fire loss of $5.0 million (see Note 11 for details).

Equity in net loss of unconsolidated affiliate

Equity in net loss of unconsolidated affiliate of zero and $15.3 million for the 2024 YTD and 2023 YTD, respectively, arises out of our ownership interest in the Nemaska Lithium Project, which is 50%. Nemaska Lithium was consolidated on a quarter-lag basis for the 2024 YTD and was accounted for as an equity method investment for the 2023 YTD. The $15.3 million loss for the 2023 YTD represents Arcadium's 50% share of project-related costs incurred by the Nemaska Lithium Project for continuing construction of the lithium hydroxide conversion plant in Bécancour, Québec (see Note 9 for details).

Income tax expense

The increase in income tax expense to $89.1 million for the 2024 YTD resulting in an effective tax rate of 43.8% compared to the income tax expense of $38.5 million resulting in an effective tax rate of 15.8% for the 2023 YTD, was primarily due to an increase in fluctuations in foreign currency impacts in Argentina of $124.5 million and $(0.5) million for the 2024 YTD and 2023 YTD, respectively. The increase in fluctuations in foreign currency impacts in Argentina for the 2024 YTD of $124.5 million was partially offset by changes in valuation allowance on the net deferred tax assets in Argentina of $(77.2) million, primarily relating to the fluctuations in foreign currency impacts in Argentina. In addition, the increase in income tax expense is due to an increase in forecasted jurisdictional mix of earnings where the statutory rate is higher than the U.S. federal statutory rate. The increase in income tax expense was partially offset by a decrease in income from operations.

Net income

Net income of $114.4 million for the 2024 YTD decreased $90.6 million, or approximately 44%, versus $205.0 million for the 2023 YTD. The decrease was due to lower gross margin of $127.7 million, higher income taxes of $50.6 million and higher Restructuring and other charges of $75.4 million, partially offset by gain from our sale of Argentina Sovereign U.S. dollar-denominated bonds and foreign currency remeasurement gains related to U.S. dollar-denominated cash balances temporarily held at a foreign currency-functional subsidiary, interest income, net in the 2024 YTD and $15.3 million equity in net loss of unconsolidated affiliate in the 2023 YTD.

Adjusted EBITDA

Adjusted EBITDA of $207.9 million for the six months ended June 30, 2024 decreased $84.0 million, compared to $291.9 million for the six months ended June 30, 2023, primarily due to lower revenues due to lower pricing of $161.7 million across all legacy Livent products and higher cost of $12.4 million excluding depreciation, partially offset by higher volumes of $15.4 million driven by lithium carbonate and the impact from Allkem post-merger contribution of $75.1 million.

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LIQUIDITY AND CAPITAL RESOURCES

Our prospective success in funding our cash needs will depend on the strength of the lithium market and our continued ability to generate cash from operations and raise capital from other sources. Our primary sources of cash are currently generated from operations and borrowings under our Revolving Credit Facility.

Arcadium's cash and cash equivalents as of June 30, 2024 and December 31, 2023, were $380.4 million and $237.6 million, respectively. The balance as of December 31, 2023 represents only predecessor Livent cash and cash equivalents. Of the cash and cash equivalents balance as of June 30, 2024, $358.6 million were held by our foreign subsidiaries, including $214.7 million at partially-owned subsidiaries. The cash held by foreign subsidiaries for permanent reinvestment is generally used to finance the subsidiaries’ operating activities and future foreign investments. We have not provided additional income taxes for any additional outside basis differences inherent in our investments in subsidiaries that are considered permanently reinvested. For those earnings that are not considered permanently reinvested, we have recorded the associated tax expense related to the repatriation of those earnings, where appropriate. See Note 11, Part II, Item 8 of our 2023 Annual Report on Form 10-K for more information.

Statement of Cash Flows

Cash (used in)/provided by operating activities was $(119.7) million and $181.6 million for the 2024 YTD and 2023 YTD, respectively.

The decrease in cash used by operating activities for the 2024 YTD as compared to the cash provided by operating activities for the 2023 YTD was primarily driven by a decrease in net income and an increase in inventories and trade receivables, partially offset by an increase in accounts payable for the 2024 YTD.

Cash provided by/(used in) investing activities was $158.4 million and $(180.2) million for the 2024 YTD and 2023 YTD, respectively.

The increase in cash provided by investing activities for the 2024 YTD compared to the 2023 YTD is primarily due to the $682 million cash acquired in the Allkem Livent Merger and $50.5 million in net cash proceeds from the Blue Chip Swap trades offset by an increase in capital expenditures due to the consolidation of Nemaska Lithium and increased spend on expansion projects due to the Allkem Livent Merger in the 2024 YTD.

Cash provided by/(used in) financing activities was $119.6 million and $(21.6) million for the 2024 YTD and 2023 YTD, respectively.

The increase in cash provided by financing activities for the 2024 YTD compared to the 2023 YTD is primarily due to the receipt of a customer prepayment of $150 million related to the Nemaska customer supply agreement (see Note 9 for details), partially offset by $65.1 million for repayment of the SDV SA Project Financing Facility in its entirety and partial repayment of the Olaroz Plant Project Loan Facility in 2024 YTD and the net impact of a $21.7 million payment of deposit to Argentina Customs Authorities in 2023 YTD.

Other potential liquidity needs

We plan to meet our liquidity needs through available cash, cash generated from operations, borrowings under the committed Revolving Credit Facility, and other potential financing strategies that may be available to us. Broadly, we are attempting to have our expansion activities be supported by the cash generated from our operations over time, although this may not be possible in the short-term, particularly in light of current lithium pricing. We have decided to reduce our capital spending plan to better align it with our anticipated cash generation. See "Capital spending and capacity expansions" for additional detail. As of June 30, 2024, our remaining borrowing capacity under our Revolving Credit Facility, subject to meeting our debt covenants, is $479.4 million, including letters of credit utilization.

We repaid the $47.0 million outstanding principal balance of the SDV SA Project Financing Facility in the second quarter of 2024.

Our net leverage ratio under our Revolving Credit Facility is determined, in large part, by our ability to manage the timing and amount of our capital expenditures, which is within our control. It is also determined by our ability to achieve forecasted operating results and to pursue other working capital financing strategies that may be available to us, which is less certain and outside our control. Arcadium Lithium expects $450 million to $575 million in growth capital spending in 2024 with an additional $100 to $125 million of maintenance capital spending.

There continue to be challenges relating to expansion projects impacting both Argentina and Canada, including design and timeline modifications, labor constraints, and material shortages due to supply chain issues. This has the potential to increase costs, extend delivery times versus expectations, and reduce expected merger synergies.

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We will look to various sources of financing for development of the Nemaska Lithium Project, in which we have a 50% economic interest, including, but not limited to third-party debt financing, government funding, financing or prepayments from customers and contribution from existing shareholders.

We expect the potential economic and geopolitical consequences of various global conflicts, volatile energy costs and shortages, inflation, high interest rates, and currency fluctuations to continue in the second half of 2024. The Company remains focused on maintaining its financial flexibility and will continue to manage its cash flow and capital allocation decisions to navigate through this challenging environment.

We believe that our available cash and cash from operations, together with our borrowing availability under the Revolving Credit Facility and other potential financing strategies that may be available to us, will provide adequate liquidity for the next 12 months. Access to capital and the availability of financing on acceptable terms in the future will be affected by many factors, including our credit rating, economic conditions and the overall liquidity of capital markets and cannot be guaranteed.

The following table provides a reconciliation of Arcadium Lithium's Cash and cash equivalents (GAAP) to Adjusted cash and deposits (Non-GAAP), on an unaudited basis for illustrative purposes. We define Adjusted cash and deposits (Non-GAAP) as Cash and cash equivalents, plus restricted cash in Other non-current assets, less Nemaska Lithium Cash and cash equivalents consolidated by Arcadium on a one-quarter lag, plus Nemaska Lithium Cash and cash equivalents not on a one-quarter lag. Our management believes that this measure provides useful information about the Company's balances and liquidity to investors and securities analysts. Such measure may not be comparable to similar measures disclosed by other companies because of differing methods used by other companies in calculating Adjusted cash and deposits. These measures should not be considered as a substitute for Cash and cash equivalents or other measures of liquidity reported in accordance with U.S. GAAP.

	June 30, 2024		December 31, 2023 (1)
(in Millions)	(unaudited) 1
Arcadium Lithium Cash and cash equivalents (GAAP)	$	380.4	$	237.6
Allkem Cash and cash equivalents	—		681.4
Add:
Restricted cash in Other non-current assets:
Project Loan Facility guarantee - Stage 2 of Olaroz Plant (SDJ SA)	24.6		24.6
Project Financing Facility guarantee - Sal de Vida (SDV SA) 2	—		32.5
Other	5.0		5.0
Less:
Nemaska Lithium Cash and cash equivalents as of March 31, 2024 and October 18, 2023, respectively, consolidated by Arcadium on a one-quarter lag	(149.7)		(133.5)
Arcadium Lithium, excluding Nemaska Lithium (3)	260.3		847.6
Nemaska Lithium Cash and cash equivalents not on a one-quarter lag (4)	41.3		44.2
Adjusted cash and deposits (Non-GAAP) 3	$	301.6	$	891.8

______________

1.This unaudited information of the combined company as of December 31, 2023 is for illustrative purposes and was derived from the historical consolidated financial information of Livent, Allkem and Nemaska Lithium.

2.On May 30, 2024, SDV SA paid the outstanding principal balance of $47.0 million, a prepayment fee of $0.9 million and accrued interest and commitment fees of $1.3 million to repay the Project Financing Facility in its entirety.

3.$137.6 million and $176.9 million reserved or restricted at June 30, 2024 and December 31, 2023, respectively, to provide collateral or cash backing for guarantees primarily on Allkem debt facilities, including $29.6 million and $62.1 million at June 30, 2024 and December 31, 2023, respectively, in Other non-current assets in our condensed consolidated balance sheet. See Note 15 for details.

4.The presentation reflects NLI's actual balance at that date, not on a one-quarter lag. This differs from Nemaska Lithium cash and cash equivalents included in Arcadium Lithium's condensed consolidated balance sheet as of June 30, 2024 of $149.7 million, representing NLI's balance as of March 31, 2024 as we consolidate NLI on a one-quarter lag. See Note 9 for details. On March 28, 2024, Nemaska Lithium received cash of $150 million related to a second advance payment in connection with a customer supply agreement repayable in equal quarterly installments beginning in January 2027 and ending in October 2031.

Commitments and Contingencies

See Note 20 to the condensed consolidated financial statements included in this Quarterly Report on Form 10-Q.

Contractual Obligations and Commercial Commitments

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Information related to predecessor Livent contractual commitments as of December 31, 2023 can be found in a table included within Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations within our 2023 Annual Report on Form 10-K.

Arcadium's significant commitments assumed on the Acquisition Date related to the Allkem Livent Merger include payments of $2.5 million for the remainder of 2024 and $0.9 million for each of the years 2025 through 2028 for exploration and payments of $9.7 million, $13.0 million, $12.6 million and $5.8 million for raw materials and other operating contracts in the ordinary course of business for the remainder of 2024, 2025, 2026 and 2027, respectively.

Climate Change

A detailed discussion related to climate change can be found in Part II, Item 7 of our 2023 Annual Report on Form 10-K.

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements that have or are reasonably likely to have a current or future effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources that are material to investors.

Critical Accounting Estimates

In addition to those described in Item 7 of our 2023 Annual Report on Form 10-K, we have identified "Resources", "Inventory", "Depreciation and amortization" and "Goodwill" as Critical Accounting Estimates following the Allkem Livent Merger.

Resources

We report resources in accordance with the SEC's definition set forth in Subpart 1300 of Regulation S-K. As such, our resources are the concentration or occurrence of lithium in such form, grade or quality, and quantity that there are reasonable prospects for economic extraction. Our mineral resource estimates provide a reasonable estimate of mineralization, taking into account relevant factors such as cut-off grade, likely mining dimensions, location or continuity, that, with the assumed and justifiable technical and economic conditions, is likely to, in whole or in part, become economically extractable. The determination of resources includes estimates and assumptions about a range of geological, technical and economic factors, including: quantities, grades, production techniques, recovery rates, production costs, transport costs, commodity demand, commodity prices and exchange rates. Changes in resources impact the assessment of recoverability of exploration and evaluation assets, property, plant and equipment, the carrying amount of assets depreciated on a units of production basis, provision for site restoration and the recognition of deferred tax assets, including tax losses. Estimating the quantity and/or grade of resources requires the size, shape and depth of ore or brine bodies to be determined by analyzing geological data. This process requires complex and difficult geological judgements to interpret the data. Additional information on the Arcadium’s reserves and resources are found in Item 2, Mineral Properties, of our 2023 Annual Report on Form 10-K.

Estimates of resources may change from period to period as the economic assumptions used to estimate resource change and additional geological data is generated during the course of operations. Changes in resources may affect the Company’s financial results and financial position in a number of ways, including:

•asset carrying values may be affected due to changes in estimated future production levels,

•depreciation, depletion and amortization charged in the statement of operations may change where such charges are determined on the units of production basis, or where the useful economic lives of assets change,

•decommissioning, site restoration and environmental provisions may change where changes in estimated resources affect expectations about the timing or cost of these activities,

•the carrying amount of deferred tax assets may change due to changes in estimates of the likely recovery of the tax benefits.

Inventory

Inventories are stated at the lower of cost or net realizable value. Determination of the brine pond volumes and spodumene stockpiles is based on surveys, assays and technical studies using industry, engineering and scientific data. A degree of judgment is involved in determining assumptions and estimates.

Depreciation and amortization

Costs incurred to develop new properties are capitalized as incurred where the property can be economically developed based on proven and probable reserves. For properties which employ surface mining techniques, this includes the costs to delineate ore bodies and remove over burden to initially expose the ore body prior to the commencement of commercial production. After the commencement of commercial production, costs of major mine development that benefit the entire ore body are capitalized and amortized over the proven and probable reserves of the entire ore body. If costs relate to access specific pits, they are capitalized and amortized over the proven and probable reserves specific to that pit.

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The calculation of the units of production rate of amortization could be impacted if actual production in the future is different from current production forecast based on proven and probable reserves. This may occur if there were significant changes in the reserves driven by changes in commodity price assumptions, production costs, ore grades, foreign currency exchange rates and potential expansion of the reserves and resources through exploration activities. If reserves increased, the amortization charge per unit would decrease and if reserves decreased the amortization charge per unit would increase.

Goodwill

We account for goodwill acquired in a business combination in conformity with current accounting guidance, which requires goodwill not be amortized.

Under that guidance, goodwill is tested for impairment by comparing the estimated fair value of reporting units to the related carrying value. Reporting units are either operating business segment or one level below operating business segments for which discrete financial information is available and for which operating results are regularly reviewed by the business management. Judgment is required to determine reporting units. In applying the goodwill impairment test, a qualitative test (“Step 0”) is initially performed, where qualitative factors are first assessed to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. Qualitative factors may include, but are not limited to, economic conditions, industry and market considerations, cost factors, overall financial performance of the reporting units and other entity and reporting unit specific events. If after assessing these qualitative factors it is “more-likely-than-not” that the fair value of the reporting unit is less than the carrying value, a quantitative test (“Step 1”) is performed. During Step 1, the fair value is estimated using a discounted cash flow model. Future cash flows for all reporting units include assumptions about revenue growth rates, adjusted EBITDA margins, discount rate as well as other economic or industry-related factors. Significant management judgment is involved in estimating these variables and they include inherent uncertainties since they are forecasting future events. The Company tests its recorded goodwill for impairment in the fourth quarter of each year or upon the occurrence of events or changes in circumstances that would more likely than not reduce the fair value of its reporting units below their carrying amounts.

DERIVATIVE FINANCIAL INSTRUMENTS AND MARKET RISKS

Our earnings, cash flows and financial position are exposed to market risks relating to fluctuations in commodity prices, interest rates and foreign currency exchange rates. Our policy is to minimize exposure to our cash flow over time caused by changes in interest and currency exchange rates. To accomplish this, we have implemented a controlled program of risk management consisting of appropriate derivative contracts entered into with major financial institutions.

The analysis below presents the sensitivity of the market value of our financial instruments to selected changes in market rates and prices. The range of changes chosen reflects our view of changes that are reasonably possible over a one-year period. Market value estimates are based on the present value of projected future cash flows considering the market rates and prices chosen.

As of June 30, 2024, our net derivative financial instrument position was a net asset of $0.4 million. In the first half of 2024, we placed foreign currency hedges for 2024 projected exposure.

Foreign Currency Exchange Rate Risk

Our worldwide operations expose us to currency risk from sales, purchases, expenses and intercompany loans denominated in currencies other than the U.S. dollar, our functional currency. The primary currencies for which we have exchange rate exposure are the Euro, the British pound, the Chinese yuan, the Argentine peso, the Australian dollar, the Canadian dollar and the Japanese yen. Foreign currency debt and foreign exchange forward contracts are used in countries where we do business, thereby reducing our net asset exposure. Foreign exchange forward contracts are also used to hedge firm and highly anticipated foreign currency cash flows. We currently do not hedge foreign currency risks associated with the Argentine peso due to the limited availability and the high cost of suitable derivative instruments.

To analyze the effects of changing foreign currency rates, we have performed a sensitivity analysis in which we assume an instantaneous 10% change in the foreign currency exchange rates from their levels as of June 30, 2024 with all other variables (including interest rates) held constant.

			Hedged Currency vs. Functional Currency
(in Millions)	Net asset position on condensed consolidated balance sheets		Net liability position with 10% strengthening		Net asset position with 10% weakening
Net asset/(liability) position as of June 30, 2024	$	0.4	$	(2.1)	$	2.4

Interest Rate Risk

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One of the strategies that we can use to manage interest rate exposure is to enter into interest rate swap agreements. In these agreements, we agree to exchange, at specified intervals, the difference between fixed and variable interest amounts calculated on an agreed-upon notional principal amount. As of June 30, 2024, we had no material interest rate swap agreements.

Our debt portfolio as of June 30, 2024 is composed of fixed-rate and variable-rate debt, consisting of borrowings under our 2025 Notes, Revolving Credit Facility and two project level debt facilities and eleven affiliate loans assumed in the Allkem Livent Merger. Changes in interest rates affect different portions of our variable-rate debt portfolio in different ways. As of June 30, 2024, we had no outstanding balances under the Revolving Credit Facility.

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ITEM 3.    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The information required by this item is provided in "Derivative Financial Instruments and Market Risks," under Item 2 - Management’s Discussion and Analysis of Financial Condition and Results of Operations.

ITEM 4.    CONTROLS AND PROCEDURES

(a) Evaluation of disclosure controls and procedures. Based on management’s evaluation (with the participation of the Company’s Chief Executive Officer and Chief Financial Officer), the Chief Executive Officer and Chief Financial Officer have concluded that, as of June 30, 2024, the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) are effective to provide reasonable assurance that information required to be disclosed by the Company in reports filed or submitted under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and is accumulated and communicated to management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

(b) Changes in Internal Control over Financial Reporting. Except as noted below, there were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the period covered by this Quarterly Report on Form 10-Q that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Effective January 4, 2024, we completed the Allkem Livent Merger. We are in the process of integrating Allkem’s processes and controls over financial reporting. In accordance with our integration efforts, we plan to incorporate Allkem’s operations into our internal control over financial reporting program within the time provided by the applicable rules and regulations of the U.S. Securities and Exchange Commission.

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PART II - OTHER INFORMATION

ITEM 1.    LEGAL PROCEEDINGS

We are involved in legal proceedings from time to time in the ordinary course of our business, including with respect to workers’ compensation matters. Based on information currently available and established reserves, we have no reason to believe that the ultimate resolution of any known legal proceeding will have a material adverse effect on our financial position, liquidity or results of operations. However, there can be no assurance that the outcome of any such legal proceeding will be favorable, and adverse results in certain of these legal proceedings could have a material adverse effect on our financial position, results of operations in any one reporting period, or liquidity. Except as set forth in Note 20 to our condensed consolidated financial statements, which is incorporated herein by reference to the extent applicable, there are no material changes from the legal proceedings previously disclosed in our 2023 Annual Report on Form 10-K.

ITEM 1A.    RISK FACTORS

In addition to the other information set forth in this Quarterly Report on Form 10-Q, you should carefully consider the risk factors discussed in Part I, Item 1A of our 2023 Annual Report on Form 10-K, which is available at www.sec.gov and on our website at www.arcadiumlithium.com. We do not believe that there have been material changes in the risk factors set forth in our 2023 Annual Report on Form 10-K. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may adversely affect our business, financial condition or future results.

Forward-Looking Information

We wish to caution readers not to place undue reliance on any forward-looking statements contained herein, which speak only as of the date made. We specifically decline to undertake any obligation to publicly revise any forward-looking statements that have been made to reflect events or circumstances after the date of such statements or to reflect the occurrence of anticipated or unanticipated events.

ITEM 2.    UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Repurchases of Ordinary Shares

There were no repurchases of Arcadium's ordinary shares for the three months ended June 30, 2024. We have no publicly announced share repurchase programs.

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ITEM 3.     DEFAULTS UPON SENIOR SECURITIES

N/A

ITEM 4.    MINE SAFETY DISCLOSURES

N/A

ITEM 5.    OTHER INFORMATION

10b-5(1) Trading Plans

During the three months ended June 30, 2024, none of our directors or officers (as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934, as amended) adopted or terminated a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement (as such terms are defined in Item 408 of Regulation S-K of the Securities Act of 1933).    

ITEM 6.    EXHIBITS

*3.1	Memorandum of Association of the Registrant, as amended, effective as of November 9, 2023 (incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K, filed on January 4, 2024)
*3.2	Articles of Association of the Registrant, as amended, effective as of December 20, 2023 (incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K, filed on December 27, 2023)
31.1	Certifying Statement of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certifying Statement of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certifying Statement of the Chief Executive Officer pursuant to Section 1350 of Title 18 of the United States Code
32.2	Certifying Statement of the Chief Financial Officer pursuant to Section 1350 of Title 18 of the United States Code
101	Interactive Data File
104	The cover page from Arcadium Lithium plc’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2024, formatted in Inline XBRL.

*    Incorporated by reference.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

ARCADIUM LITHIUM PLC (Registrant)
By:	/s/ GILBERTO ANTONIAZZI
	Gilberto Antoniazzi, Vice President and Chief Financial Officer
	(Principal Financial Officer)
	(signing on behalf of the registrant and as principal financial officer)

Date: August 8, 2024

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EX-31.1

Exhibit 31.1

CHIEF EXECUTIVE OFFICER CERTIFICATION

I, Paul W. Graves, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Arcadium Lithium plc;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 8, 2024

/s/ Paul W. Graves

Paul W. Graves

President and Chief Executive Officer

EX-31.1

Exhibit 31.2

CHIEF FINANCIAL OFFICER CERTIFICATION

I, Gilberto Antoniazzi, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Arcadium Lithium plc;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 8, 2024

/s/ Gilberto Antoniazzi

Gilberto Antoniazzi

Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CEO CERTIFICATION OF QUARTERLY REPORT

I, Paul W. Graves, President and Chief Executive Officer of Arcadium Lithium plc (“the Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, based on my knowledge that:

(1)the Quarterly Report on Form 10-Q of the Company for the quarter ended June 30, 2024 (the “Report”) fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: August 8, 2024

/s/ Paul W. Graves

Paul W. Graves

President and Chief Executive Officer

EX-32.2

Exhibit 32.2

CFO CERTIFICATION OF QUARTERLY REPORT

I, Gilberto Antoniazzi, Vice President and Chief Financial Officer of Arcadium Lithium plc (“the Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, based on my knowledge that:

(1)the Quarterly Report on Form 10-Q of the Company for the quarter ended June 30, 2024 (the “Report”) fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: August 8, 2024

/s/ Gilberto Antoniazzi

Gilberto Antoniazzi

Vice President and Chief Financial Officer

XML

Cover - shares	6 Months Ended
	Jun. 30, 2024	Aug. 06, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-38694
Entity Registrant Name	ARCADIUM LITHIUM PLC
Entity Incorporation, State or Country Code	Y9
Entity Tax Identification Number	98-1737136
Entity Address, Address Line One	1818 Market Street
Entity Address, Address Line Two	Suite 2550
Entity Address, City or Town	Philadelphia
Entity Address, State or Province	PA
Entity Address, Country	US
Entity Address, Postal Zip Code	19103
City Area Code	215
Local Phone Number	299-5900
Title of 12(b) Security	Ordinary Shares, par value $1.00 per share
Trading Symbol	ALTM
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1,075,398,238
Entity Central Index Key	0001977303
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Amendment Flag	false
Other Address
Entity Information [Line Items]
Entity Address, Address Line One	Suite 12, Gateway Hub
Entity Address, Address Line Two	Shannon Airport House
Entity Address, City or Town	Shannon, Co. Clare
Entity Address, Country	IE
Entity Address, Postal Zip Code	V14 E370
City Area Code	353-1
Local Phone Number	6875238

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	[1]	Jun. 30, 2024	Jun. 30, 2023	[1]
Income Statement [Abstract]
Revenue	$ 254.5	$ 235.8		$ 515.7	$ 489.3
Cost of sales	174.1	88.5		328.9	174.8
Gross margin	80.4	147.3		186.8	314.5
Selling, general and administrative expenses	15.5	17.6		55.4	33.9
Research and development expenses	1.5	1.0		2.6	2.0
Restructuring and other charges	21.9	24.3		101.7	26.3
Total costs and expenses	213.0	131.4		488.6	237.0
Income from operations before equity in net loss of unconsolidated affiliate, interest income, net, loss on debt extinguishment and other gains	41.5	104.4		27.1	252.3
Equity in net loss of unconsolidated affiliate	0.0	7.2		0.0	15.3	[2]
Interest income, net	(9.3)	0.0		(20.3)	0.0
Loss on debt extinguishment	0.9	0.0		1.1	0.0	[2]
Other gains	(79.9)	(7.6)		(157.2)	(6.5)
Income from operations before income taxes	129.8	104.8		203.5	243.5
Income tax expense	35.3	14.6		89.1	38.5
Net income	94.5	90.2	[3],[4]	114.4	205.0	[2],[4]
Net income attributable to noncontrolling interests	8.8	0.0		13.1	0.0
Net income attributable to Arcadium Lithium plc	$ 85.7	$ 90.2		$ 101.3	$ 205.0
Basic earnings per ordinary share (in dollars per share)	$ 0.08	$ 0.21		$ 0.10	$ 0.47
Diluted earnings per ordinary share (in dollars per share)	$ 0.07	$ 0.18		$ 0.09	$ 0.41
Weighted average ordinary shares outstanding - basic (in shares)	1,074.9	432.3		1,064.2	432.2
Weighted average ordinary shares outstanding - diluted (in shares)	1,143.5	503.9		1,132.9	503.7

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

[2] Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

[3] Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem.

[4] Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023, which do not include the operations of Allkem.

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical)	Jan. 04, 2024	Jun. 30, 2023
Exchange ratio		2.406
Allkem Livent Merger
Exchange ratio	2.406

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	[3]	Jun. 30, 2024	Jun. 30, 2023	[3]
Statement of Comprehensive Income [Abstract]
Net income	$ 94.5	$ 90.2	[1],[2]	$ 114.4	$ 205.0	[1],[4]
Foreign currency adjustments:
Foreign currency translation (loss)/income arising during the period	(10.3)	(1.0)		(30.5)	0.5
Foreign currency translation adjustments	(10.3)	(1.0)	[2]	(30.5)	0.5
Derivative instruments:
Unrealized hedging gains, net of tax of less than zero, $(0.1), $(0.1), and $(0.2)	0.1	0.4	[2]	0.3	0.6
Total derivative instruments	0.1	0.4		0.3	0.6
Other comprehensive (loss)/income, net of tax	(10.2)	(0.6)		(30.2)	1.1
Comprehensive income	84.3	89.6		84.2	206.1
Comprehensive income attributable to noncontrolling interests	8.8	0.0		13.1	0.0
Comprehensive income attributable to Arcadium Lithium plc	$ 75.5	$ 89.6		$ 71.1	$ 206.1

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

[2] Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem.

[3] Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023, which do not include the operations of Allkem.

[4] Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Unrealized hedging losses, tax	$ 0	$ (100,000)	$ (100,000)	$ (200,000)

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	[1]
Current assets
Cash and cash equivalents	$ 380.4	$ 237.6
Trade receivables, net of allowance of approximately $0.1 in 2024 and $0.3 in 2023	94.1	106.7
Inventories, net	333.1	217.5
Prepaid and other current assets	264.0	86.4
Total current assets	1,071.6	648.2
Investments	38.2	34.8
Property, plant and equipment, net of accumulated depreciation of $307.8 in 2024 and $269.1 in 2023	7,034.9	2,237.1
Goodwill	1,300.3	120.7
Other intangibles, net	56.6	53.4
Deferred income taxes	32.7	1.4
Right of use assets - operating leases, net	53.7	6.8
Other assets	342.3	127.7
Total assets	9,930.3	3,230.1
Current liabilities
Short-term debt and current portion of long-term debt	43.4	2.4
Accounts payable, trade and other	146.8	115.4
Accrued and other liabilities	159.8	136.8
Contract liability - short-term	37.1	4.4
Operating lease liabilities - current	8.4	1.3
Income taxes	78.3	8.3
Total current liabilities	473.8	268.6
Long-term debt	590.6	299.6
Operating lease liabilities - long-term	45.6	5.6
Environmental liabilities	7.4	7.0
Deferred income taxes	1,380.1	126.4
Contract liability - long-term	253.8	217.8
Other long-term liabilities	89.4	21.3
Commitments and contingent liabilities (Note 20)	0.0	0.0
Total current and long-term liabilities	2,840.7	946.3
Equity
Ordinary shares; $1.00 par value; 5,000,000,000 shares authorized; 1,075,210,958 and 433,059,946 shares issued; 1,074,948,055 and 432,796,277 outstanding as of June 30, 2024 and December 31, 2023, respectively	0.1	0.1
Capital in excess of par value of ordinary shares	5,577.9	1,170.4
Retained earnings	765.8	664.5
Accumulated other comprehensive loss	(80.0)	(49.8)
Treasury shares, ordinary, at cost; 262,903 and 263,669 shares as of June 30, 2024 and December 31, 2023, respectively	(1.0)	(1.0)
Total Arcadium Lithium plc shareholders’ equity	6,262.8	1,784.2
Noncontrolling interests	826.8	499.6
Total equity	7,089.6	2,283.8
Total liabilities and equity	$ 9,930.3	$ 3,230.1

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Current assets
Allowance for trade receivables	$ 0.1	$ 0.3
Accumulated depreciation	$ 307.8	$ 269.1
Equity
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	5,000,000,000	5,000,000,000
Common stock, shares issued (in shares)	1,075,210,958	433,059,946
Common stock, outstanding (in shares)	1,074,948,055	432,796,277
Treasury stock, shares (in shares)	262,903	263,669

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
Cash (used in)/provided by operating activities:
Net income		$ 114.4	$ 205.0	[1],[2],[3]
Adjustments to reconcile net income to cash (used in)/provided by operating activities:
Depreciation and amortization		48.4	13.8	[2]
Restructuring and other charges		(43.4)	15.7	[2]
Deferred income taxes		(66.6)	2.3	[2]
Share-based compensation		5.7	4.0	[2]
Change in investments in trust fund securities		(1.1)	0.8	[2]
Loss on debt extinguishment		1.1	0.0	[1],[2]
Equity in net loss of unconsolidated affiliate		0.0	15.3	[1],[2]
Other gain, Blue Chip Swap		(50.5)	(11.4)	[2]
Other non-cash adjustments		3.0	(0.4)	[2]
Changes in operating assets and liabilities:
Trade receivables, net		77.1	19.0	[2]
Inventories		4.2	(46.7)	[2]
Accounts payable, trade and other		(149.7)	(17.0)	[2]
Changes in deferred compensation		1.6	1.1	[2]
Contract liability - short-term		32.7	(13.2)	[2]
Contract liability - long-term		(16.5)	0.0	[2]
Income taxes		(8.3)	(9.8)	[2]
Change in prepaid and other current assets and other assets		(125.7)	6.1	[2]
Change in accrued and other current liabilities and other long-term liabilities		53.9	(3.0)	[2]
Cash (used in)/provided by operating activities		(119.7)	181.6	[2]
Cash provided by/(used in) investing activities:
Capital expenditures	[4]	(539.7)	(157.8)	[2]
Investments in Arcadium NQSP securities		(1.1)	(0.8)	[2]
Proceeds from Blue Chip Swap, net of purchases		50.5	11.4	[2]
Acquired cash & cash equivalents - Allkem Livent Merger		681.4	0.0	[2]
Investments in unconsolidated affiliates	[5]	(27.0)	(29.5)	[2]
Other investing activities		(5.7)	(3.5)	[2]
Cash provided by/(used in) investing activities		158.4	(180.2)	[2]
Cash provided by/(used in) financing activities:
Proceeds from Revolving Credit Facility		123.0	0.0	[2]
Repayments of Revolving Credit Facility		(123.0)	0.0	[2]
Payments of financing fees		(4.4)	(0.3)	[2]
Proceeds from issuance of ordinary shares - incentive plans		0.0	0.4	[2]
Repayments of project loan facilities		(65.1)	0.0	[2]
Proceeds from prepayment of customer supply agreement		150.0	0.0	[2]
Capital contribution from noncontrolling interest - Nemaska Lithium		39.1	0.0	[2]
Payment of deposit to customs authorities		0.0	(21.7)	[2]
Cash provided by/(used in) financing activities		119.6	(21.6)	[2]
Effect of exchange rate changes on cash and cash equivalents		(15.5)	(1.0)	[2]
Increase/(decrease) in cash and cash equivalents		142.8	(21.2)	[2]
Cash and cash equivalents, beginning of period		237.6	189.0	[2]
Cash and cash equivalents, end of period		380.4	167.8	[2]
Supplemental Disclosure for Cash Flow:
Cash payments for income taxes, net of refunds		98.9	41.4	[6]
Cash payments for interest	[4]	11.1	5.8	[6]
Cash payments for Restructuring and other charges		145.1	10.4	[6]
Accrued capital expenditures		141.7	34.7	[6]
Accrued transaction costs - investment in unconsolidated affiliate		0.0	0.2	[6]
Operating lease right-of-use assets and lease liabilities recorded for ASC 842		$ 0.0	$ 1.2	[6]

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

[2] Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

[3] Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023, which do not include the operations of Allkem.

[4] For the six months ended June 30, 2024 and 2023, $11.9 million and $8.4 million of interest expense was capitalized, respectively.

[5] On October 18, 2023 we began consolidating Nemaska Lithium, see Note 9 for details.

[6] Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Statement of Cash Flows [Abstract]
Interest expense capitalized	$ 11.9	$ 8.4

XML

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions		Total		Ordinary Shares, $1.00 Per Share Par Value	Capital In Excess of Par	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Shares	Non-controlling Interest
Beginning balance at Dec. 31, 2022	[1]	$ 1,443.0		$ 0.1	$ 1,160.4	$ 334.4	$ (51.0)	$ (0.9)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	[1]	114.8				114.8
Share compensation plans	[1]	1.9			1.9
Shares withheld for taxes - ordinary share issuances	[1]	(0.5)			(0.5)
Exercise of stock options	[1]	0.1			0.1
Net hedging gains, net of income tax	[1]	0.2					0.2
Foreign currency translation adjustments	[1]	1.5					1.5
Ending balance at Mar. 31, 2023	[1]	1,561.0		0.1	1,161.9	449.2	(49.3)	(0.9)	0.0
Beginning balance at Dec. 31, 2022	[1]	1,443.0		0.1	1,160.4	334.4	(51.0)	(0.9)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	[2],[3],[4]	205.0
Net hedging gains, net of income tax	[4]	0.6
Foreign currency translation adjustments	[4]	0.5
Ending balance at Jun. 30, 2023	[1]	1,653.0		0.1	1,164.3	539.4	(49.9)	(0.9)	0.0
Beginning balance at Mar. 31, 2023	[1]	1,561.0		0.1	1,161.9	449.2	(49.3)	(0.9)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	[1]	90.2	[2],[4]			90.2
Share compensation plans	[1]	2.1			2.1
Exercise of stock options	[1]	0.3			0.3
Net hedging gains, net of income tax	[1]	0.4	[4]				0.4
Foreign currency translation adjustments	[1]	(1.0)	[4]				(1.0)
Ending balance at Jun. 30, 2023	[1]	1,653.0		0.1	1,164.3	539.4	(49.9)	(0.9)	0.0
Beginning balance at Dec. 31, 2023		2,283.8	[5]	0.1	1,170.4	664.5	(49.8)	(1.0)	499.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		19.9				15.6			4.3
Allkem Livent Merger		4,665.4			4,390.4				275.0
Share compensation plans		15.8			15.8
Shares withheld for taxes - ordinary share issuances		(2.6)			(2.6)
Net hedging gains, net of income tax		0.2					0.2
Foreign currency translation adjustments		(20.2)					(20.2)
Ending balance at Mar. 31, 2024		6,962.3		0.1	5,574.0	680.1	(69.8)	(1.0)	778.9
Beginning balance at Dec. 31, 2023		2,283.8	[5]	0.1	1,170.4	664.5	(49.8)	(1.0)	499.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		114.4
Net hedging gains, net of income tax		0.3
Foreign currency translation adjustments		(30.5)
Ending balance at Jun. 30, 2024		7,089.6		0.1	5,577.9	765.8	(80.0)	(1.0)	826.8
Beginning balance at Mar. 31, 2024		6,962.3		0.1	5,574.0	680.1	(69.8)	(1.0)	778.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		94.5				85.7			8.8
Capital contribution from noncontrolling interest		39.1							39.1
Share compensation plans		3.9			3.9
Net hedging gains, net of income tax		0.1					0.1
Foreign currency translation adjustments		(10.3)					(10.3)
Ending balance at Jun. 30, 2024		$ 7,089.6		$ 0.1	$ 5,577.9	$ 765.8	$ (80.0)	$ (1.0)	$ 826.8

[1] Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem.

[2] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

[3] Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

[4] Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023, which do not include the operations of Allkem.

[5] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

XML

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares	Jun. 30, 2024	Jan. 04, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00

XML

Description of the Business

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of the Business

Description of the Business

Background and Nature of Operations

Arcadium Lithium plc ("Arcadium", "Arcadium Lithium", "we", "us", "Company" or "our") is a public limited company incorporated under the laws of the Bailiwick of Jersey. On January 4, 2024, Arcadium Lithium completed the previously announced Allkem Livent Merger by which Livent Corporation, a Delaware corporation ("Livent"), and Allkem Limited, an Australian company limited by shares ("Allkem"), became wholly owned subsidiaries of Arcadium Lithium. On January 4, 2024, the Company's shares started trading on the New York Stock Exchange under the trading symbol ALTM. See Note 4, Allkem Livent Merger for further details.

While Arcadium Lithium is a newly formed company from the merger of Allkem and Livent, our company has a rich heritage of innovation and a long, proven history of producing performance lithium compounds in a safe and sustainable manner. We are vertically integrated, with a global footprint and industry-leading end-to-end capabilities across lithium production including hard-rock mining, conventional pond-based brine extraction, direct lithium brine extraction and lithium chemicals manufacturing.

Our lithium asset portfolio, consisting of both operating assets and development projects, provides us with global reach, scale, and product flexibility. Today we have operating resources in Argentina and Australia and downstream conversion assets in the U.S., China, Japan, and the U.K. We also have multiple development stage projects in Argentina (greenfield and brownfield) and Canada (greenfield) that will in time allow us to increase production capabilities and meet the future needs of customers around the world. In the U.S., we operate the only integrated mine-to-metal production facility in the Western Hemisphere for high purity lithium metal, a core component of next generation battery technologies.

We manufacture a wide range of lithium products, including battery-grade lithium hydroxide, battery-grade lithium carbonate, spodumene, and other specialty chemicals such as butyllithium and high purity lithium metal. Our products are used in various performance applications, including lithium-based batteries, specialty polymers and pharmaceutical products and chemical synthesis applications.

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Significant Accounting Policies and Related Financial Information

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Significant Accounting Policies and Related Financial Information

Significant Accounting Policies and Related Financial Information

In this Form 10-Q, the results of the Company as of June 30, 2024 and for the three and six months ended June 30, 2024 include the operations and financial position of Allkem, respectively. Because Arcadium Lithium plc is the successor company to Livent in the Allkem Livent Merger, we are presenting the results of predecessor Livent’s operations for the three and six months ended June 30, 2023 and as of December 31, 2023, which do not include the financial position or operations of Allkem. Refer to Note 4 for further information related to the Allkem Livent Merger.

The accompanying condensed consolidated financial statements were prepared in accordance with the requirements of the Securities and Exchange Commission ("SEC") for interim reporting. As permitted under those rules, certain notes or other financial information that are normally required by U.S. GAAP have been condensed or omitted from these interim financial statements. The financial statements included in this report reflect all normal and recurring adjustments which, in the opinion of management, are necessary for a fair presentation of our condensed consolidated balance sheets as of June 30, 2024 and December 31, 2023, the condensed consolidated results of operations, the condensed consolidated statement of comprehensive income and the condensed consolidated statement of changes in equity for the three and six months ended June 30, 2024 and 2023, and the condensed consolidated cash flows for the six months ended June 30, 2024 and 2023. All intercompany transactions and balances have been eliminated in consolidation. For entities that we control, but own less than 100%, we record the minority ownership as noncontrolling interest. The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year. These statements, therefore, should be read in conjunction with the annual consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (the "2023 Annual Report on Form 10-K").

Reclassifications

Certain prior period balances have been reclassified to conform to the current period presentation in the condensed consolidated financial statements and the accompanying notes.

Effective April 1, 2024, we began presenting gains and losses from foreign currency remeasurements as a component of Other gains/losses. Prior to April 1, 2024, we included gains and losses resulting from foreign currency remeasurements as a component of Cost of sales and Restructuring and other charges in the condensed consolidated statement of operations. The following tables summarize the accounts that were recast for the three and six months ended June 30, 2023 and the three months ended March 31, 2024 to conform to the current period presentation.

	Three Months Ended June 30,						Six Months Ended June 30
	2023						2023
(in Millions)	Prior Presentation		Loss/(gain) Reclassified		Recast Presentation		Prior Presentation		Loss/(gain) Reclassified		Recast Presentation
Cost of sales	$	92.4	$	3.9	$	88.5	$	179.9	$	5.1	$	174.8
Restructuring and other charges	24.2		(0.1)		24.3		26.1		(0.2)		26.3
Other (gains)/losses	(11.4)		3.8		(7.6)		(11.4)		4.9		(6.5)

	Three Months Ended March 31,
	2024
(in Millions)	Prior Presentation		(Gain)/loss Reclassified		Recast Presentation
Cost of sales	$	116.8	$	(38.0)	$	154.8
Restructuring and other charges	$	83.6	$	3.8	$	79.8
Other (gains)/losses	$	(43.1)	$	(34.2)	$	(77.3)

Segment Information

In January 2024, Arcadium Lithium completed the Allkem Livent Merger. See Note 4, Allkem Livent Merger for further details. Following the closing of the Allkem Livent Merger, we currently operate as one reportable segment based on the commonalities among our products and services. As integration evolves, we will continue to assess this determination.

Revenue Recognition

Revenue from product sales is recognized when we satisfy a performance obligation by transferring the promised goods to a customer, that is, when control of the good transfers to the customer. Payment terms generally range from 20 to 180 days.

In determining when the control of goods is transferred, we typically assess, among other things, the transfer of title and risk of loss and the shipping terms of the contract.

We record amounts billed for shipping and handling fees as revenue. Costs incurred for shipping and handling are recorded in cost of sales. When we perform shipping and handling activities after the transfer of control to the customer (e.g., when control transfers prior to delivery), they are considered fulfillment activities, and accordingly, the costs are accrued to cost of sales when the related revenue is recognized.

Amounts billed for sales and use taxes, VAT, and certain excise and other specific transactional taxes imposed on revenue-producing transactions are presented on a net basis and excluded from revenue in the condensed consolidated statements of operations. We record a liability until remitted to the respective taxing authority.

We satisfy our obligations by transferring goods and services in exchange for consideration from customers. The timing of performance sometimes differs from the timing the associated consideration is received from the customer, thus resulting in the recognition of a contract asset or liability. These may arise from provisional pricing within certain of our customer contracts, or if the customer’s payment of consideration is received prior to completion of our related performance obligation. Provisional pricing results in variable consideration which we estimate by using an expected value method taking into account all information that is reasonably available including publicly available pricing forecasts. We only include variable consideration within the transaction price to the extent that it is probable that a significant reversal in the amount of revenue recognized will not occur.

Equity method investments

We stop applying the equity method when we have reduced the value of our equity method investment, commitments and additional investments (i.e., loans or advances) in the investee to zero. If the investee subsequently reports net income, we resume applying the equity method when our share of that net income is equal to the suspended losses (i.e., our share of the investee's net losses not previously recognized).

If facts and circumstances indicate that a decrease in value of the investment has occurred that is other than temporary, we recognize an impairment loss equal to an amount by which the carrying amount exceeds the fair value of the equity method investment. There were no impairments during the six months ended June 30, 2024.

Goodwill

The Company accounts for goodwill and other intangibles acquired in a business combination in conformity with current accounting guidance that requires that goodwill and indefinite-lived intangible assets not be amortized.

Under the guidance, goodwill is tested for impairment by comparing the estimated fair value of reporting units to the related carrying value. Reporting units are either operating business segments or one level below operating business segments for which discrete financial information is available and for which operating results are regularly reviewed by the business management. In applying the goodwill impairment test, a qualitative test ("Step 0") is initially performed, under which qualitative factors are assessed to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. Qualitative factors may include, but are not limited to, economic conditions, industry and market considerations, cost factors, overall financial performance of the reporting units and other entity and reporting unit specific events. If after assessing these qualitative factors, it is determined that it is "more-likely-than-not" that the fair value of the reporting unit is less than the carrying value, a quantitative test ("Step 1") is performed. During Step 1, the fair value is estimated using a discounted cash flow model.

Impairment evaluations of goodwill could result in a reduction in our recorded asset values which could have a material adverse effect on our financial position and results of operations. We perform reviews of goodwill on an annual basis, or more frequently if triggering events indicate a possible impairment. We test goodwill at the reporting unit level by comparing the carrying value of the net assets of the reporting unit, including goodwill, to the reporting unit's fair value. If the carrying values of goodwill exceed their fair value, the goodwill would be considered impaired. If any impairment or related charge is warranted, our financial position and results of operations could be materially affected. Any such impairment or related charge could be a result of, for example, sustained declines in the Company’s stock price; the deterioration of the cost of equity or debt capital increases due to valuations for comparable companies or comparable acquisitions valuations; or the deterioration of the outlook for future cash flows for the reporting unit due to but not limited to, increased competition, changes to discount rate, downward forecast revisions, restricted plans or changes in applicable regulations affecting our business.

Mine Development Costs

Mine development costs include: a) exploration and evaluation ("E&E") expenditures incurred during the search for mineral resources as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource; and b) stripping costs of removing overburden and waste materials to access the mineral body at an open pit mine.

The Company capitalizes E&E expenditures to PP&E under a successful efforts basis when proven and probable reserves are established for the sites where E&E activities are being performed. E&E assets recognized as part of business combinations are also capitalized. All other E&E expenditures are expensed.

Stripping costs incurred prior to the production phase are capitalized to PP&E during the development of an open pit mine. When multiple open pits exist at a mining complex utilizing common processing facilities, such pre-production stripping costs are capitalized at each pit. The removal, production, and sale of de minimis saleable materials may occur during the development phase of an open pit mine and are assigned incremental mining costs related to the removal of that material. The production phase of an open pit mine commences when saleable minerals, beyond a de minimis amount, are produced. Stripping costs incurred during the production phase of a mine are variable production costs that are included as a component of inventory to be recognized in Cost of sales in the same period as the revenue from sale of that inventory.

Capitalized mine development costs are amortized using the units-of-production method based on estimated recoverable minerals in proven and probable reserves, and are amortized over the estimated life of the mineral body.

Mineral Interests

Mineral interests include acquired interests in production, development and exploration stage properties. Mineral interests are capitalized at their fair value at the acquisition date, either as an individual asset purchase or as part of a business combination. Mineral interests in the development and exploration stage are not amortized until the underlying property is converted to the production stage, at which point the mineral interests are amortized over the estimated recoverable proven and probable reserves using a units-of-production method.

Asset Retirement Obligations

The Company accounts for asset retirement obligations ("AROs") in accordance with ASC 410-20, Asset Retirement Obligations "ASC 410-20". We record AROs at present value at the time the liability is incurred if we can reasonably estimate the settlement date. The associated AROs are capitalized as part of the carrying amount of related long-lived assets. In future periods, the liability is accreted to its present value and the capitalized cost is depreciated over the useful life of the related asset. We also adjust the liability for changes resulting from the passage of time and/or revisions to the timing or the amount of the original estimate. Upon retirement of the long-lived asset, we settle the obligation for its recorded amount. See Note 14, for details.

The carrying amounts of the AROs as of June 30, 2024 and December 31, 2023 was $11.3 million and $3.7 million, respectively. These amounts are included in Accrued and other current liabilities and Other long-term liabilities in our condensed consolidated balance sheets.

Blue Chip Swap

Our wholly owned subsidiaries in Argentina use the U.S. dollar as their functional currency. Argentina peso-denominated monetary assets and liabilities are remeasured at each balance sheet date to the official currency exchange rate then in effect which represents the exchange rate available for external commerce (import payments and export collections) and financial payments, with currency remeasurement and other transaction gains and losses recognized in earnings. In September 2019, the President of Argentina reinstituted exchange controls restricting foreign currency purchases in an attempt to stabilize Argentina’s financial markets. As a result, a legal trading mechanism known as the Blue Chip Swap emerged in Argentina for all individuals or entities to transfer U.S. dollars out of and into Argentina. The Blue Chip Swap rate is the implicit exchange rate resulting from the Blue Chip Swap transaction. In the first half of 2024, U.S. dollars were transferred into Argentina through the Blue Chip Swap method whereby we realized a gain from the purchase in U.S. dollars and sale in Argentina pesos of Argentina Sovereign U.S. dollar-denominated bonds. The gain of $20.9 million and $50.5 million for the three and six months ended June 30, 2024 was recorded to Other gains in our condensed consolidated statements of operations.

Li-Metal transaction

On August 2, 2024, Arcadium announced it acquired the lithium metal division of Li-Metal Corp. The all-cash $11 million USD transaction includes the intellectual property and physical assets related to lithium metal production, including a pilot production facility in Ontario, Canada.

Arcadium Lithium uses lithium metal to manufacture specialty products, including high purity lithium metal ("HPM") and LIOVIX®, a proprietary printable lithium metal formulation, for primary battery applications and next-generation batteries. Arcadium Lithium also processes lithium metal into butyllithium, as well as other lithium specialty chemicals used in medicine, agriculture, electronics and other industries.

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Recently Issued and Adopted Accounting Pronouncements and Regulatory Items

6 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

Recently Issued and Adopted Accounting Pronouncements and Regulatory Items

Recently Issued and Adopted Accounting Pronouncements and Regulatory Items

In December 2023, the Financial Accounting Standard Board ("FASB") issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU enhances existing income tax disclosures to better assess how an entity's operation and related tax risks, tax planning, and operational opportunities affect its tax rate and prospects for future cash flows. The ASU is effective for annual periods beginning after December 15, 2024. We are currently evaluating the effect the guidance will have on our condensed consolidated financial statements.

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU improves reportable segment disclosure requirements, primarily through enhanced disclosures related to significant segment expenses. The ASU is effective for annual periods beginning after December 15, 2023, and interim periods beginning after December 15, 2024. We are currently evaluating the effect the guidance will have on our condensed consolidated financial statements.

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Allkem Livent Merger

6 Months Ended

Jun. 30, 2024

Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]

Allkem Livent Merger

Allkem Livent Merger

On January 4, 2024 (the "Acquisition Date") Arcadium completed the previously announced Allkem Livent Merger by and among Livent Corporation, a Delaware corporation ("Livent"), Allkem Limited, an Australian public company ("Allkem"), Arcadium Lithium plc, a public limited company incorporated under the laws of the Bailiwick of Jersey ("Arcadium"), Lightning-A Merger Sub, Inc. ("Merger Sub"), and Arcadium Lithium Intermediate IRL Limited, a private company limited by shares and incorporated and registered in Ireland ("Irish IntermediateCo").

The transaction was consummated by way of (a) a scheme of arrangement under Australian law, pursuant to which each issued, fully paid ordinary share of Allkem held by Allkem shareholders was exchanged for either one Arcadium Lithium CHESS Depositary Instrument (a "CDI") quoted on the Australian Stock Exchange (each CDI representing a beneficial ownership interest in one Arcadium ordinary share), or one Arcadium ordinary share (par value $1.00 per share) and (b) a merger, whereby Merger Sub, a wholly owned subsidiary of Irish IntermediateCo (a direct wholly owned subsidiary of Arcadium) merged with and into Livent, with Livent as the surviving entity. Each share of Livent common stock, par value $0.001 per share (each, a "Livent Share"), was converted into the right to receive 2.406 Arcadium ordinary shares.

Pursuant to the Allkem Livent Merger, 433,156,855 Arcadium ordinary shares (including 96,909 related to accelerated PRSU awards) were issued to former Livent stockholders and 641,337,840 Arcadium ordinary shares (comprising 98,725,616 Arcadium ordinary shares and 542,612,224 CDIs in respect of Arcadium ordinary shares) were issued to former Allkem shareholders. The Acquisition Date fair value of consideration transferred consisted of the following:

(in millions)	Amount
Consideration:
Fair value of Arcadium ordinary shares issued to Allkem shareholders	$	4,385.6
Fair value of converted Allkem performance rights attributable to pre-combination service	4.8
Total consideration	$	4,390.4

The Allkem Livent Merger meets the criteria to be accounted for as a business combination and is accounted for using the acquisition method of accounting with Livent being treated as the accounting acquirer. Under the acquisition method of accounting, the assets and liabilities of Allkem and its subsidiaries are recorded at their respective fair values as of the date of completion of the Allkem Livent Merger and the difference between the fair value of the consideration paid for the acquired entity and fair value of the net assets acquired is recorded as goodwill.

The fair value of the assets, liabilities and noncontrolling interest of Allkem under the business combination guidance, including the impact of income taxes, is preliminary. The preliminary fair value allocation is subject to change for up to one year subsequent to the Acquisition Date. Determining the fair value of the assets and liabilities of Allkem requires judgement and certain assumptions to be made, the most significant of these being related to the valuation of Allkem's mining properties and rights.

Transaction and related costs directly attributable to the acquisition of Allkem, consisting primarily of advisor fees, legal fees, accounting fees, and certain deal related bonuses were $19.8 million and $86.8 million, for the three and six months ended June 30, 2024, respectively. The costs were expensed as incurred and are included in restructuring and other charges.

The following table summarizes the preliminary purchase price allocation for the Allkem Livent Merger as of January 4, 2024, which is subject to change:

(in Millions, except per share amounts)	Amount
Total consideration	$	4,390.4
Assets acquired:
Cash and cash equivalents	$	681.4
Trade receivables	64.2
Inventories	121.3
Prepaid and other current assets	87.2
Property, plant and equipment	4,326.1
Right of use assets - operating leases, net	53.4
Deferred income tax assets	26.3
Other assets (1)	192.9
Total assets acquired	$	5,552.8
Liabilities assumed:
Accounts payable, trade and other	$	223.7
Accrued and other current liabilities	35.1
Income taxes	78.5
Long-term debt including current portion	301.7
Operating lease liabilities - long-term	53.4
Environmental liabilities	9.8
Deferred income tax liabilities	1,315.3
Other long-term liabilities	49.5
Total liabilities assumed	$	2,067.0
Fair value of net assets acquired	$	3,485.8
Add: Fair value of noncontrolling interests acquired	275.0
Fair value of net assets acquired less noncontrolling interests acquired	$	3,210.8
Goodwill	$	1,179.6

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1.Includes long-term semi-finished goods inventory.

Trade receivables

The $64.2 million of acquired trade receivables represents the fair value of the gross amount due under the contracts.

Property, Plant and Equipment

Property, plant and equipment is inclusive of the fair value of mineral rights totaling $2,745 million and non-mineral rights property, plant and equipment totaling $1,581.1 million. The fair value of the mineral rights was estimated using the multi-period excess earnings method. The excess earnings methodology is an income approach methodology that estimates the projected cash flows of the business attributable to the asset, net of charges for the use of other identifiable assets of the business including working capital, fixed assets, and other intangible assets. Mineral rights are depreciated using a units-of-production method while all other property, plant and equipment is depreciated using the straight-line method.

Goodwill

Goodwill from acquisitions represents the excess of the purchase price over the fair value of net assets acquired. The amount disclosed within the table, subject to change for up to one year subsequent to the Acquisition Date, is attributable to the value of growth opportunities and expected synergies created by incorporating Allkem's business and operations into the Company's operations and the value of the assembled workforce. The goodwill has no amortizable basis for income tax purposes.

Allkem revenues and earnings

The following table represents Allkem's revenues and net earnings included in Arcadium's condensed consolidated statements of operations from the Acquisition Date through June 30, 2024.

(in Millions)	Three Months Ended June 30,		Six Months Ended June 30,
	2024
Revenue	$	83.8	$	186.3
Income from operations before income taxes	$	75.8	$	152.2

Pro Forma Financial Information

Due to the Allkem Livent Merger closing on January 4, 2024, all activity in the first quarter of 2024 except for the first three days of January, which management deemed not material, is included in Arcadium’s condensed consolidated statements of operations. The following unaudited pro forma financial information for the three and six months ended June 30, 2023 is based on our historical consolidated financial statements adjusted to reflect the Allkem Livent Merger as if it occurred on January 1, 2023, the first day of the most recently completed fiscal year. The unaudited pro forma financial information is not necessarily indicative of what would have occurred if the Allkem Livent Merger had been completed as of the beginning of the periods presented, nor is it indicative of future results. The unaudited pro forma information is not necessarily indicative of operating results that would have been achieved had the acquisition been completed as of January 1, 2023 and does not intend to project the future financial results of the Company after the acquisition. The unaudited pro forma information is based on certain assumptions, which management believes are reasonable, and does not reflect the cost of any integration activities or synergies that may be derived from any integration activities. The unaudited pro forma financial results are as follows:

(in Millions)	Three Months Ended June 30,		Six Months Ended June 30,
	2023
	(Unaudited)
Revenue	$	569.8	$	1,139.2
Net income	278.4		$	513.4

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Goodwill

6 Months Ended

Jun. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Goodwill

The following table summarizes the changes in goodwill for the six months ended June 30, 2024.

(in Millions)	Allkem		Nemaska Lithium		Total
Balance as of December 31, 2023	$	—	$	120.7	$	120.7
Acquisitions - Allkem Livent Merger	1,189.2		—		1,189.2
Measurement period adjustments	(9.6)		—		(9.6)
Balance as of June 30, 2024	$	1,179.6	$	120.7	$	1,300.3

See Note 4 for further details.

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Revenue Recognition

6 Months Ended

Jun. 30, 2024

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue Recognition     

Disaggregation of revenue

We disaggregate revenue from contracts with customers by geographical areas (based on product destination) and by product categories. The following table provides information about disaggregated revenue by major geographical region:

(in Millions)	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Asia Pacific (1)	$	211.8	$	171.6	$	431.9	$	338.6
North America (1)	22.8		40.7		43.5		92.6
Europe, Middle East & Africa	19.5		23.5		39.1		56.3
Latin America	0.4		—		1.2		1.8
Consolidated Revenue	$	254.5	$	235.8	$	515.7	$	489.3

1.During the three months ended June 30, 2024, countries with sales in excess of 10% of consolidated revenue consisted of China and Japan. Sales for the three months ended June 30, 2024 for China and Japan totaled $155.1 million and $31.8 million, respectively. During the six months ended June 30, 2024, countries with sales in excess of 10% of consolidated revenue consisted of China, Japan, and South Korea. Sales for the six months ended June 30, 2024 for China, Japan, and South Korea totaled $281.0 million, $77.8 million, and $64.9 million, respectively. During the three months ended June 30, 2023, countries with sales in excess of 10% of consolidated revenue consisted of China, Japan, the U.S., and South Korea. Sales for the three months ended June 30, 2023 for China, Japan, the U.S., and South Korea totaled $90.8 million, $42.7 million, $39.9 million, and $31.2 million, respectively. During the six months ended June 30, 2023, countries with sales in excess of 10% of consolidated revenue consisted of China, the U.S., Japan, and South Korea. Sales for the six months ended June 30, 2023 for China, the U.S., Japan, and South Korea, totaled $179.2 million, $90.1 million, $76.1 million, and $66.3 million, respectively.

For the three months ended June 30, 2024, two customers accounted for approximately 24%, and 21%, respectively, of consolidated revenue and our 10 largest customers accounted in aggregate for approximately 72% of consolidated revenue. For the six months ended June 30, 2024, three customers accounted for approximately 23%, 18%, and 10%, respectively, of consolidated revenue and our 10 largest customers accounted in aggregate for approximately 73% of consolidated revenue. For the three months ended June 30, 2023, two customers accounted for approximately 24% and 23% of consolidated revenue and our 10 largest customers accounted in aggregate for approximately 72% of consolidated revenue. For the six months ended June 30, 2023, two customers accounted for approximately 24% and 21% of consolidated revenue and our 10 largest customers accounted in aggregate for approximately 68% of consolidated revenue. A loss of any material customer could have a material adverse effect on our business, financial condition and results of operations.

The following table provides information about disaggregated revenue by major product category:

(in Millions)	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Lithium Hydroxide	$	113.1	$	153.6	$	223.7	$	306.3
Lithium Carbonate (1)	72.7		5.1		152.5		14.5
Butyllithium and Other Lithium Specialties	44.9		77.1		90.9		168.5
Spodumene Concentrate (2)	23.8		—		48.6		—
Consolidated Revenue	$	254.5	$	235.8	$	515.7	$	489.3

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1.Includes lithium carbonate by-product revenue.

2.Includes low-grade spodumene sales and minimal other products.

Contract asset and contract liability balances

We satisfy our obligations by transferring goods and services in exchange for consideration from customers. The timing of performance sometimes differs from the timing the associated consideration is received from the customer, thus resulting in the recognition of a contract asset or liability. Provisional pricing within certain of our customer contracts may result in recognition

of a contract asset or liability. We recognize a contract liability if the customer’s payment of consideration is received prior to completion of our related performance obligation.

The following table presents the opening and closing balances of our contract liabilities and current trade receivables, net of allowances from contracts with customers.

(in Millions)	Balance as of June 30, 2024		Balance as of December 31, 2023		(Decrease)/increase
Receivables from contracts with customers, net of allowances	$	94.1	$	106.7	$	(12.6)
Contract liability - short-term	37.1		4.4		32.7
Contract liability - long-term	253.8		217.8		36.0

Performance obligations

Occasionally, we may enter into multi-year take or pay supply agreements with customers. The aggregate amount of revenue expected to be recognized related to these contracts’ performance obligations is approximately $1.7 billion in the next five years. Based on our past experience with the customers under these arrangements, we expect to continue recognizing revenue in accordance with the contracts as we transfer control of the product to the customer. However, in the case a shortfall of volume purchases occurs, we will recognize the amount payable by the customer over the remaining performance obligations in the contract.

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Inventories, Net

6 Months Ended

Jun. 30, 2024

Inventory Disclosure [Abstract]

Inventories, Net

Inventories, Net

Inventories consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
Finished goods	$	130.3	$	59.1
Semi-finished goods	101.4		108.8
Raw materials, supplies, and other	101.4		49.6
Inventory, net	$	333.1	$	217.5

Inventories are stated at the lower of cost or net realizable value. Inventory costs include those costs directly attributable to products before sale, including all manufacturing overhead but excluding distribution costs. All inventories are determined on a first-in, first-out ("FIFO") basis.

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Investments

6 Months Ended

Jun. 30, 2024

Equity Method Investments and Joint Ventures [Abstract]

Investments

Investments    

Investments consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
ESM ILiAD, LLC	$	30.1	$	30.1
Arcadium NQSP	6.3		4.7
Other	1.8		—
Investments	$	38.2	$	34.8

ESM ILiAD, LLC ("ESM")

In the fourth quarter of 2023, the Company entered into an agreement with EnergySource Minerals, LLC ("EnergySource"), a developer of lithium projects in the Salton Sea Known Geothermal Resource Area in California, for a minority equity interest in ESM, a subsidiary of EnergySource and the parent company of ILiAD Technologies, LLC ("ILiAD Technologies"). In connection with its investment in ESM, Arcadium Lithium will have the right to license ILiAD Technologies' Integrated Lithium Adsorption Desorption ("ILiAD") technology for potential deployment at its lithium brine resources in Argentina.

Arcadium Lithium accounts for its interest in ESM under ASC Topic 321, Investments – Equity Securities ("ASC 321"). Since our investment in ESM does not have a readily determinable fair value, we use the measurement alternative under ASC 321. Our investment is measured at cost less impairments, adjusted for observable price changes in orderly transactions for the identical or similar investment of the same issuer. If the Company determines that an indicator of impairment or upward adjustment is present, an adjustment is recorded, which is measured as the difference between carrying value and estimated fair value. Estimated fair value is generally determined using an income approach on discounted cash flows or negotiated transaction values. As of June 30, 2024 and December 31, 2023, the carrying amount of our investment in ESM was $30.1 million.

Toyotsu Lithium Corporation ("TLC")

The Company owns 49% of the Class A voting shares and 100% of the Class B non-voting shares in TLC. Toyota Tsusho Corporation ("TTC") owns 51% of the Class A voting shares. As a result, the Company has a 75% economic interest and a 49% ownership interest in TLC and TTC has the remaining 25% economic interest and 51% ownership interest in TLC. TLC constructed and now operates the Naraha Lithium Hydroxide Plant (the "Naraha Plant"), located in Japan. The technical grade lithium carbonate feedstock for the plant is sourced from the Company’s Olaroz Plant.

The Company accounts for its interest in TLC as an equity method investment because it does not have control but has significant influence. This is evidenced by the Company having 2 of the 5 board members while decisions are made by a majority. In addition to capital contributions made through its investment in TLC, Allkem has also provided past funding through loans. At the Acquisition Date, the carrying values of the investment in TLC and a fully reserved loan receivable were zero and fair value was deemed to be equal to carrying value.

For the three and six months ended June 30, 2024, we did not record any gains or losses related to our interest in TLC to Equity in net loss of unconsolidated affiliates in our condensed consolidated statements of operations. At June 30, 2024, the carrying values of our interest in TLC and the loan receivable were zero.

Partially-Owned Subsidiaries and Noncontrolling Interests

Nemaska Lithium Inc. ("Nemaska Lithium", or "NLI")

Nemaska Lithium, domiciled in Canada and headquartered in Montreal, Québec, is a non-public lithium company not yet in the production stage. It is a development company aiming to vertically integrate, from extracting, processing and concentrating spodumene to conversion of spodumene into battery-grade lithium hydroxide, primarily intended for EV and other energy storage applications. Its primary assets are construction in progress and intangibles principally related to intellectual property. Nemaska Lithium intends to develop the Whabouchi spodumene mine and concentrator in the James Bay region of Québec and a lithium hydroxide conversion plant in Bécancour, Québec (collectively, the "Nemaska Lithium Project"). As a developing company and to fund the Nemaska Lithium Project, Nemaska Lithium is reliant on securing financing from its shareholders through share subscriptions.

On October 18, 2023, we entered into an amendment to our shareholders agreement with Nemaska Lithium, and also amendments to certain related service agreements. The amendments to these agreements provide QLP with control of certain substantive participating rights, and as such, the Company began to consolidate Nemaska Lithium as of October 18, 2023. Nemaska Lithium is a development company which, as of the October 18, 2023 consolidation date, met the U.S. GAAP definition of a business and, as such, the Company remeasured its equity interest in Nemaska, including the noncontrolling interest of Investissement Québec ("IQ"), at fair value as of the consolidation date. We estimated the fair value of IQ's noncontrolling interest by multiplying the total fair value of Nemaska Lithium equity by IQ's equity ownership interest and also considered any discounts for lack of control and marketability.

The fair value of the assets and liabilities of Nemaska Lithium assumed under business combination accounting guidance for the Nemaska Lithium consolidation, including the impact of income taxes, is preliminary. The preliminary fair value allocation is subject to change for up to one year subsequent to the October 18, 2023 consolidation date of Nemaska Lithium. Determining the fair value of the assets and liabilities of Nemaska Lithium requires judgment and certain assumptions to be made, the most significant of these being related to the valuation of Nemaska Lithium's mining properties and rights. Nemaska Lithium is consolidated on a one-quarter lag basis.

Before October 18, 2023, the Company accounted for its 50% interest in Nemaska Lithium as an equity method investment on a one-quarter lag basis and it was included in Investments in our consolidated balance sheets. The carrying amount of our interest in Nemaska Lithium was $437.1 million as of December 31, 2022 under equity method investment accounting. For the three and six months ended June 30, 2023 we recorded a $7.2 million and $15.3 million loss related to our interest in Nemaska Lithium to Equity in net loss of unconsolidated affiliate in our condensed consolidated statements of operations.

Arcadium's cash and cash equivalents balance in its condensed consolidated balance sheet as of June 30, 2024 includes Nemaska Lithium's cash of $149.7 million at March 31, 2024 as Nemaska Lithium is consolidated on a one-quarter lag. All cash at Nemaska Lithium will be used for capital expenditures and operating expenses of the Nemaska Lithium Project.

On March 28, 2024, Nemaska Lithium received cash of $150 million related to a second advance payment in connection with a customer supply agreement repayable in equal quarterly installments beginning in January 2027 and ending in October 2031. The related liability, consolidated on a quarter lag basis, is $97.8 million debt and $52.2 million contract liability. A total of $350 million in prepayments are expected from the customer and as of June 30, 2024, $225 million has been received.

Sales de Jujuy Pte Ltd and Sales de Jujuy S.A.

The Company has an interest of 72.68% in Sales de Jujuy Pte Ltd ("SDJ Pte"), 66.5% in Sales de Jujuy S.A. ("SDJ SA"), the legal entities which operate the Olaroz Lithium Facility (the "Olaroz Plant").

Located in the Jujuy Province of northern Argentina, the Olaroz Plant produces lithium carbonate chemicals for the battery, technical and chemical markets. The Olaroz Plant is operated through SDJ SA, which is a 91.5% owned subsidiary of SDJ Pte, a Singaporean company owned by Arcadium (72.68%) and Toyotsu Lithium Pte Ltd. (27.32%), an affiliated company of TTC. Jujuy Energia y Minera Sociedad del Estado ("JEMSE") owns the remaining 8.5% of SDJ SA. Consequently, the effective equity ownership of the Olaroz Plant is 66.5% by Arcadium, 25% by TTC, and 8.5% by JEMSE.

As of June 30, 2024, Arcadium had restricted cash of $24.6 million on deposit with Mizuho as collateral for the Project Loan Facility and classified within Other non-current assets in its condensed consolidated balance sheets. See Note 15 for details.

Arcadium's cash and cash equivalents balance in its condensed consolidated balance sheet as of June 30, 2024 includes $65 million held by the entities discussed above.

Arcadium funded JEMSE’s equity contributions in SDJ SA with an interest-free loan (the "JEMSE Receivable") to be repaid by JEMSE out of 33% of the dividends it receives from SDJ SA. The fair value of the non-current receivable is $5.0 million as of June 30, 2024.

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Partially-Owned Subsidiaries and Noncontrolling Interests

6 Months Ended

Jun. 30, 2024

Equity Method Investments and Joint Ventures [Abstract]

Partially-Owned Subsidiaries and Noncontrolling Interests

Investments    

Investments consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
ESM ILiAD, LLC	$	30.1	$	30.1
Arcadium NQSP	6.3		4.7
Other	1.8		—
Investments	$	38.2	$	34.8

ESM ILiAD, LLC ("ESM")

In the fourth quarter of 2023, the Company entered into an agreement with EnergySource Minerals, LLC ("EnergySource"), a developer of lithium projects in the Salton Sea Known Geothermal Resource Area in California, for a minority equity interest in ESM, a subsidiary of EnergySource and the parent company of ILiAD Technologies, LLC ("ILiAD Technologies"). In connection with its investment in ESM, Arcadium Lithium will have the right to license ILiAD Technologies' Integrated Lithium Adsorption Desorption ("ILiAD") technology for potential deployment at its lithium brine resources in Argentina.

Arcadium Lithium accounts for its interest in ESM under ASC Topic 321, Investments – Equity Securities ("ASC 321"). Since our investment in ESM does not have a readily determinable fair value, we use the measurement alternative under ASC 321. Our investment is measured at cost less impairments, adjusted for observable price changes in orderly transactions for the identical or similar investment of the same issuer. If the Company determines that an indicator of impairment or upward adjustment is present, an adjustment is recorded, which is measured as the difference between carrying value and estimated fair value. Estimated fair value is generally determined using an income approach on discounted cash flows or negotiated transaction values. As of June 30, 2024 and December 31, 2023, the carrying amount of our investment in ESM was $30.1 million.

Toyotsu Lithium Corporation ("TLC")

The Company owns 49% of the Class A voting shares and 100% of the Class B non-voting shares in TLC. Toyota Tsusho Corporation ("TTC") owns 51% of the Class A voting shares. As a result, the Company has a 75% economic interest and a 49% ownership interest in TLC and TTC has the remaining 25% economic interest and 51% ownership interest in TLC. TLC constructed and now operates the Naraha Lithium Hydroxide Plant (the "Naraha Plant"), located in Japan. The technical grade lithium carbonate feedstock for the plant is sourced from the Company’s Olaroz Plant.

The Company accounts for its interest in TLC as an equity method investment because it does not have control but has significant influence. This is evidenced by the Company having 2 of the 5 board members while decisions are made by a majority. In addition to capital contributions made through its investment in TLC, Allkem has also provided past funding through loans. At the Acquisition Date, the carrying values of the investment in TLC and a fully reserved loan receivable were zero and fair value was deemed to be equal to carrying value.

For the three and six months ended June 30, 2024, we did not record any gains or losses related to our interest in TLC to Equity in net loss of unconsolidated affiliates in our condensed consolidated statements of operations. At June 30, 2024, the carrying values of our interest in TLC and the loan receivable were zero.

Partially-Owned Subsidiaries and Noncontrolling Interests

Nemaska Lithium Inc. ("Nemaska Lithium", or "NLI")

Nemaska Lithium, domiciled in Canada and headquartered in Montreal, Québec, is a non-public lithium company not yet in the production stage. It is a development company aiming to vertically integrate, from extracting, processing and concentrating spodumene to conversion of spodumene into battery-grade lithium hydroxide, primarily intended for EV and other energy storage applications. Its primary assets are construction in progress and intangibles principally related to intellectual property. Nemaska Lithium intends to develop the Whabouchi spodumene mine and concentrator in the James Bay region of Québec and a lithium hydroxide conversion plant in Bécancour, Québec (collectively, the "Nemaska Lithium Project"). As a developing company and to fund the Nemaska Lithium Project, Nemaska Lithium is reliant on securing financing from its shareholders through share subscriptions.

On October 18, 2023, we entered into an amendment to our shareholders agreement with Nemaska Lithium, and also amendments to certain related service agreements. The amendments to these agreements provide QLP with control of certain substantive participating rights, and as such, the Company began to consolidate Nemaska Lithium as of October 18, 2023. Nemaska Lithium is a development company which, as of the October 18, 2023 consolidation date, met the U.S. GAAP definition of a business and, as such, the Company remeasured its equity interest in Nemaska, including the noncontrolling interest of Investissement Québec ("IQ"), at fair value as of the consolidation date. We estimated the fair value of IQ's noncontrolling interest by multiplying the total fair value of Nemaska Lithium equity by IQ's equity ownership interest and also considered any discounts for lack of control and marketability.

The fair value of the assets and liabilities of Nemaska Lithium assumed under business combination accounting guidance for the Nemaska Lithium consolidation, including the impact of income taxes, is preliminary. The preliminary fair value allocation is subject to change for up to one year subsequent to the October 18, 2023 consolidation date of Nemaska Lithium. Determining the fair value of the assets and liabilities of Nemaska Lithium requires judgment and certain assumptions to be made, the most significant of these being related to the valuation of Nemaska Lithium's mining properties and rights. Nemaska Lithium is consolidated on a one-quarter lag basis.

Before October 18, 2023, the Company accounted for its 50% interest in Nemaska Lithium as an equity method investment on a one-quarter lag basis and it was included in Investments in our consolidated balance sheets. The carrying amount of our interest in Nemaska Lithium was $437.1 million as of December 31, 2022 under equity method investment accounting. For the three and six months ended June 30, 2023 we recorded a $7.2 million and $15.3 million loss related to our interest in Nemaska Lithium to Equity in net loss of unconsolidated affiliate in our condensed consolidated statements of operations.

Arcadium's cash and cash equivalents balance in its condensed consolidated balance sheet as of June 30, 2024 includes Nemaska Lithium's cash of $149.7 million at March 31, 2024 as Nemaska Lithium is consolidated on a one-quarter lag. All cash at Nemaska Lithium will be used for capital expenditures and operating expenses of the Nemaska Lithium Project.

On March 28, 2024, Nemaska Lithium received cash of $150 million related to a second advance payment in connection with a customer supply agreement repayable in equal quarterly installments beginning in January 2027 and ending in October 2031. The related liability, consolidated on a quarter lag basis, is $97.8 million debt and $52.2 million contract liability. A total of $350 million in prepayments are expected from the customer and as of June 30, 2024, $225 million has been received.

Sales de Jujuy Pte Ltd and Sales de Jujuy S.A.

The Company has an interest of 72.68% in Sales de Jujuy Pte Ltd ("SDJ Pte"), 66.5% in Sales de Jujuy S.A. ("SDJ SA"), the legal entities which operate the Olaroz Lithium Facility (the "Olaroz Plant").

Located in the Jujuy Province of northern Argentina, the Olaroz Plant produces lithium carbonate chemicals for the battery, technical and chemical markets. The Olaroz Plant is operated through SDJ SA, which is a 91.5% owned subsidiary of SDJ Pte, a Singaporean company owned by Arcadium (72.68%) and Toyotsu Lithium Pte Ltd. (27.32%), an affiliated company of TTC. Jujuy Energia y Minera Sociedad del Estado ("JEMSE") owns the remaining 8.5% of SDJ SA. Consequently, the effective equity ownership of the Olaroz Plant is 66.5% by Arcadium, 25% by TTC, and 8.5% by JEMSE.

As of June 30, 2024, Arcadium had restricted cash of $24.6 million on deposit with Mizuho as collateral for the Project Loan Facility and classified within Other non-current assets in its condensed consolidated balance sheets. See Note 15 for details.

Arcadium's cash and cash equivalents balance in its condensed consolidated balance sheet as of June 30, 2024 includes $65 million held by the entities discussed above.

Arcadium funded JEMSE’s equity contributions in SDJ SA with an interest-free loan (the "JEMSE Receivable") to be repaid by JEMSE out of 33% of the dividends it receives from SDJ SA. The fair value of the non-current receivable is $5.0 million as of June 30, 2024.

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Property, Plant and Equipment, Net

6 Months Ended

Jun. 30, 2024

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

Property, Plant and Equipment, Net

Property, plant and equipment consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
Land and land improvements	$	319.8	$	106.2
Buildings	896.7		134.9
Machinery and equipment	735.0		420.7
Mineral rights	3,280.0		560.0
Construction in progress	2,111.2		1,284.4
Total cost	$	7,342.7	$	2,506.2
Accumulated depreciation	(307.8)		(269.1)
Property, plant and equipment, net	$	7,034.9	$	2,237.1

Depreciation is calculated principally on a straight-line basis over the estimated useful lives of the assets or a units-of-production basis based on the rate of depletion of reserves. Land is not depreciated. The major classifications of property, equipment and software, including their respective principal depreciation and amortization method and expected useful lives, consisted of the following:

Asset type	Depreciation and amortization method	Useful Life
Land	N/A	—
Land improvements	Straight-line	20 years
Buildings	Straight-line	20-40 years
Mineral rights	Units-of-production	Based on rate of depletion of reserves
Mining extraction equipment	Units-of-production	Based on rate of depletion of reserves
Leased plant and equipment	Straight-line	Lease period (1-10.5 years)
Other machinery and equipment	Straight-line	3-18 years
Software	Straight-line	3-10 years

Depreciation expense was $44.7 million and $12.3 million for the six months ended June 30, 2024 and 2023, respectively.

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Restructuring and Other Charges

6 Months Ended

Jun. 30, 2024

Restructuring and Related Activities [Abstract]

Restructuring and Other Charges

Restructuring and Other Charges

The following table shows other charges included in Restructuring and other charges in the condensed consolidated statements of operations:

	Three Months Ended June 30,				Six Months Ended June 30,
(in Millions)	2024		2023		2024		2023
Restructuring charges:
Severance-related and exit costs	$	3.2	$	0.7	$	14.1	$	2.4
Other charges:
Costs related to the Allkem Livent Merger	19.8		18.8		86.8		18.8
Bessemer City plant fire loss	—		5.0		—		5.0
Other	(1.1)		(0.2)		0.8		0.1
Total Restructuring and other charges	$	21.9	$	24.3	$	101.7	$	26.3

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Other gains

6 Months Ended

Jun. 30, 2024

Other Income and Expenses [Abstract]

Other gains

Other gains

The following table shows amounts included in Other gains in the condensed consolidated statements of operations:

	Three Months Ended June 30,				Six Months Ended June 30,
(in Millions)	2024		2023		2024		2023
Blue Chip Swap gains: (1)
Non-recurring - SDV SA and MdA Holdings LLC (2)	$	16.8	$	11.4	$	36.5	$	11.4
Recurring - SDJ and MdA	4.1		—		14.0		—
Total Blue Chip Swap gains	20.9		11.4		50.5		11.4
Foreign currency remeasurement gains/(losses):
Remeasurement gains on U.S. dollar denominated cash held by foreign currency functional subsidiary	0.4		—		14.3		—
All other foreign currency remeasurement gains/(losses) (3)	58.6		(3.8)		92.8		(4.9)
Total Foreign currency remeasurement gains/(losses)	59.0		(3.8)		107.1		(4.9)
Loss on trading securities	—		—		(0.4)		—
Total Other gains	$	79.9	$	7.6	$	157.2	$	6.5

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1.See Note 2 for details.

2.Represents the non-recurring gain from the sale in Argentina pesos of Argentina Sovereign U.S. dollar-denominated bonds due to the divergence of Argentina's Blue Chip Swap market exchange rate from the official rate.

3.The three and six months ended June 30, 2024 primarily includes impact of currency fluctuations on deferred income tax assets and liabilities related to the Allkem Livent Merger.

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Income Taxes

6 Months Ended

Jun. 30, 2024

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

We determine our interim tax provision using an estimated annual effective tax rate methodology ("EAETR") in accordance with U.S. GAAP. The EAETR is applied to the year-to-date ordinary income, exclusive of discrete items. The tax effects of discrete items are then included to arrive at the total reported interim tax provision.

The determination of the EAETR is based upon a number of estimates, including the estimated annual pretax ordinary income in each tax jurisdiction in which we operate. As our projections of ordinary income change throughout the year, the EAETR will change period-to-period. The tax effects of discrete items are recognized in the tax provision in the period they occur in accordance with U.S. GAAP. Depending on various factors, such as the item’s significance in relation to total income and the rate of tax applicable in the jurisdiction to which it relates, discrete items in any quarter can materially impact the reported effective tax rate. As a global enterprise, our tax expense can be impacted by changes in tax rates or laws, the finalization of tax audits and reviews, as well as other factors. As a result, there can be significant volatility in interim tax provisions.

Provision for income taxes for the three and six months ended June 30, 2024 was an expense of $35.3 million and $89.1 million resulting in an effective tax rate of 27.2% and 43.8%, respectively. Provision for income taxes for the three and six months ended June 30, 2023 was an expense of $14.6 million and $38.5 million resulting in an effective tax rate of 13.9% and 15.8%, respectively.

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Asset Retirement Obligations

6 Months Ended

Jun. 30, 2024

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligation

Asset Retirement Obligations

Legacy Allkem asset retirement obligations acquired in the Allkem Livent Merger were recorded at fair value on the Acquisition Date and consist of $7.3 million, $1.5 million and $1.0 million related to the Mt Cattlin spodumene mine in Western Australia, the Olaroz lithium brine extraction facility in Jujuy, Argentina and the Sal de Vida lithium brine extraction facility (currently under development) in Catamarca, Argentina, respectively.

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Debt

6 Months Ended

Jun. 30, 2024

Debt Disclosure [Abstract]

Debt

Debt

Long-term debt

Long-term debt consists of the following:

	Interest Rate Percentage			Maturity Date	June 30, 2024		December 31, 2023
(in Millions)	SOFR borrowings	Base rate borrowings
Revolving Credit Facility (1)	7.19%	9.25%		2027	$	—	$	—
4.125% Convertible Senior Notes due 2025			4.125%	2025	245.8		245.8
Transaction costs - 2025 Notes					(1.6)		(2.4)
Nemaska - Prepayment agreement - tranche 1 (2)			8.9%		75.0		75.0
Discount - Prepayment agreement					(19.4)		(19.8)
Nemaska - Prepayment agreement - tranche 2 (2)			9.4%		150.0		—
Discount - Prepayment agreement					(53.4)		—
Nemaska - Other					0.5		3.4
Debt assumed in Allkem Livent Merger (3)
Project Loan Facility - Stage 1 of Olaroz Plant			4.90%	2024	9.1		—
Project Loan Facility - Stage 2 of Olaroz Plant			2.61%	2029	144.0		—
Affiliate Loans with TTC			15.25%	2030	81.5		—
Affiliate Loan with TLP			10.34%	2026	2.5		—
Total debt assumed in Allkem Livent Merger					237.1		—
Subtotal long-term debt (including current maturities)					634.0		302.0
Less current maturities					(43.4)		(2.4)
Total long-term debt					$	590.6	$	299.6

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1.As of June 30, 2024 and December 31, 2023, there were $20.6 million and $15.5 million, respectively, in letters of credit outstanding under our Revolving Credit Facility and $479.4 million and $484.5 million available funds as of June 30, 2024 and December 31, 2023, respectively. Fund availability is subject to the Company meeting its debt covenants.

2.Represents advance payments in connection with customer supply agreement which do not have a contractual interest rate or bear any actual interest and are repayable in equal quarterly installments beginning in January 2027 and ending in October 2031. Represents U.S. GAAP imputed interest rate.

3.On May 30, 2024, SDV SA paid the outstanding principal balance of $47.0 million, a prepayment fee of $0.9 million and accrued interest and commitment fees of $1.3 million to repay the Sal de Vida Project Financing Facility in its entirety.

4.125% Convertible Senior Notes due 2025

In 2020, the Company issued $245.8 million in aggregate principal amount of 4.125% Convertible Senior Notes due in July 2025 (the "2025 Notes"). The 2025 Notes are our general unsecured senior obligations. Total net cash proceeds received were $238.2 million net of $7.6 million of third-party transaction costs, including initial purchasers' discounts and commissions. The Company used or will use the net proceeds received to finance or refinance eligible green projects designed to align with the provisions of the International Capital Market Association Green Bond Principles 2018.

Each $1,000 of principal of the 2025 Notes was initially convertible into 114.4885 shares of common stock of Livent Corporation, which was equivalent to an initial conversion price of $8.73 per share, subject to adjustment upon the occurrence of specified events. Following the effectiveness of that certain First Supplemental Indenture, dated as of January 4, 2024, by and among the Company, Livent Corporation and U.S. Bank Trust Company, National Association, each $1,000 of principal of the 2025 Notes is convertible into 275.459331 shares of our ordinary shares, which is equivalent to a conversion price of $3.63 per share, subject to adjustment upon the occurrence of specified events. We may redeem for cash all or any portion of the 2025 Notes, at our option, if the last reported sale price of our ordinary shares has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last

trading day of such period) ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the 2025 Notes to be redeemed, plus accrued and unpaid interest. Holders of the 2025 Notes may convert their notes at any time, at their option, on or after January 15, 2025. Further, holders of the 2025 Notes may convert their notes at any time, at their option, prior to January 15, 2025 only under the following circumstances: (1) during any calendar quarter commencing after September 30, 2020 (and only during such calendar quarter), if the last reported sale price of our ordinary shares for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each trading day; (2) during the five-business day period after any five-consecutive trading day period in which the trading price per $1,000 principal amount of the 2025 Notes for each trading day of such period is less than 98% of the product of the last reported sale price of our ordinary shares and the conversion rate on each such trading day, (3) if we call any or all of the 2020 Notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date or (4) if specified corporate events occur. Upon conversion, the 2025 Notes will be settled in cash, shares of our ordinary shares or a combination thereof, at our election. If a fundamental change occurs prior to the maturity date, holders of the 2025 Notes may require us to repurchase all or a portion of their 2025 Notes for cash at a repurchase price equal to 100% of the principal amount plus any accrued and unpaid interest. In addition, if specific corporate events occur prior to the maturity date or if we deliver a notice of redemption, we will increase the conversion rate for a holder who elects to convert its 2025 Notes in connection with such an event or notice of redemption in certain circumstances.

The last reported sale price of our ordinary shares for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on, and including, June 30, 2024 was not greater than or equal to 130% of the conversion price as adjusted for the Allkem Livent Merger, which is $4.72, on each trading day, and as a result, the holders do not have the option to convert all or any portion of their 2025 Notes through September 30, 2024.

The conversion rate for the 2025 Notes is 275.4593 ordinary shares of Arcadium Lithium per $1,000 principal amount of 2025 Notes. The 2025 Notes mature in July 2025 and are classified as long-term debt.

On the July 15, 2025 maturity date, we are required to cash settle any outstanding 2025 Notes that have not otherwise been redeemed or converted.

The Company recognized non-cash interest related to the amortization of transaction costs for the 2025 Notes of $0.4 million and $0.8 million for the three and six months ended June 30, 2024, respectively, all of which was capitalized. The Company recorded $2.5 million and $5.0 million of accrued interest expense related to the principal amount for the three and six months ended June 30, 2024, respectively, all of which was capitalized.

Amended and Restated Credit Agreement, (the "Revolving Credit Facility")

On January 4, 2024, Livent Corporation, Livent USA Corp., the Company, Arcadium Lithium Financing IRL Limited ("FinCo") and Irish IntermediateCo (collectively, the "Borrowers" and, each, a "Borrower"), the guarantors party thereto from time to time (the "Guarantors"), the lenders party thereto (the "Lenders") and issuing banks party thereto and Citibank, N.A., as administrative agent (the "Administrative Agent") for the Lenders, entered into a Joinder and First Amendment (the "Credit Agreement Amendment") to that certain Amended and Restated Credit Agreement, dated as of September 1, 2022, among Livent, Livent USA Corp., the guarantors party thereto from time to time, the lenders party thereto from time to time and the Administrative Agent (the "Credit Agreement" and as amended by the Credit Agreement Amendment, the Amended Credit Agreement").

The Credit Agreement Amendment provided for, among other things, (i) the addition of Arcadium, Irish IntermediateCo and FinCo as borrowers and obligors under the Amended Credit Agreement and (ii) the assignment of certain of Livent Corporation's rights and obligations (including information reporting obligations) under the Amended Credit Agreement to Arcadium.

The Revolving Credit Facility provides for a $500 million senior secured revolving credit facility, $50 million of which is available for the issuance of letters of credit for the account of the Borrowers, with an option to request, and subject to each Lender’s sole discretion, that the aggregate revolving credit commitments be increased to up to $700 million. The issuance of letters of credit and the proceeds of revolving credit loans made pursuant to the Revolving Credit Facility may be used for general corporate purposes, including capital expenditures and permitted acquisitions.

Revolving loans under the Revolving Credit Facility will bear interest at a floating rate, which will be (i) a base rate, (ii) Adjusted Term Secured Overnight Financing Rate ("SOFR") (defined as the forward-looking SOFR term rate published by CME Group Benchmark Administration Limited plus 0.10% per annum subject to a floor of zero) or (iii) Euro Interbank

Offered Rate ("EURIBOR"), plus, in each case, an applicable margin, as determined in accordance with the provisions of the Revolving Credit Facility. The Revolving Credit Facility includes a quarterly commitment fee on the average daily unused amount of each Lender’s revolving credit commitment at a rate equal to an applicable percentage based on the Company’s first lien leverage ratio. The initial commitment fee is 0.25% per annum. Amounts under the Revolving Credit Facility may be borrowed, repaid and re-borrowed from time to time until the final maturity date on September 1, 2027. Voluntary prepayments and commitment reductions are permitted at any time without payment of any prepayment fee upon proper notice and subject to minimum dollar amounts. Certain of the Borrowers’ domestic subsidiaries (the "Guarantors") guarantee the obligations of the Borrowers under the Revolving Credit Facility. The obligations of the Borrower and the Guarantors are secured by all of the assets of the Borrowers and the Guarantors, including the Borrowers’ facility and real estate in Bessemer City, North Carolina, subject to certain exceptions and exclusions.

We recorded $0.8 million of incremental deferred financing costs in the condensed consolidated balance sheets for the Revolving Credit Facility commitment and legal fees and a zero and $0.2 million loss on debt extinguishment in the condensed consolidated statements of operations for the three and six months ended June 30, 2024, respectively, for the write off of existing deferred financing costs to recognize a partial change in syndication related to the Revolving Credit Facility. The carrying value of our deferred financing costs was $2.5 million as of June 30, 2024 and is recorded to Other assets in our condensed consolidated balance sheet.

Covenants

The Credit Agreement contains certain affirmative and negative covenants that are binding on us and our subsidiary, Livent USA Corp., as borrowers (the "Borrowers") and their subsidiaries, including, among others, restrictions (subject to exceptions and qualifications) on the ability of the Borrowers and their subsidiaries to create liens, to undertake fundamental changes, to incur debt, to sell or dispose of assets, to make investments, to make restricted payments such as dividends, distributions or equity repurchases, to change the nature of their businesses, to enter into transactions with affiliates and to enter into certain restrictive agreements. Furthermore, the Borrowers are subject to financial covenants regarding leverage (measured as the ratio of debt to adjusted earnings) and interest coverage (measured as the ratio of adjusted earnings to interest expense). Our maximum allowable first lien leverage ratio is 3.5 as of June 30, 2024. Our minimum allowable interest coverage ratio is 3.5. We were in compliance with all requirements of the covenants as of June 30, 2024.

Debt assumed as a result of Allkem Livent Merger

The following is a summary of Allkem's indebtedness that Arcadium Lithium assumed as a result of the Allkem Livent Merger.

Project Financing Facility

Galaxy Lithium (SAL DE VIDA) S.A. ("SDV SA"), which is owned 100% by Arcadium, entered into a project financing facility with the International Finance Corporation related to the Sal de Vida development project ("Sal de Vida") in Argentina (the "Project Financing Facility"). The Project Financing Facility originally provided for a total of $180.0 million in limited recourse, sustainability-linked green project financing maturing in March 2033. On May 30, 2024, SDV SA paid the lender the outstanding principal balance of $47.0 million, a prepayment fee of $0.9 million and accrued interest and commitment fees of $1.3 million to repay the Project Financing Facility in its entirety.

Project Loan Facility

SDJ SA has a project loan facility with Mizuho Bank related to the Olaroz Plant (the "Project Loan Facility"):

•The Project Loan Facility for Stage 1 of the Olaroz Plant had an outstanding principal balance of $9.1 million as of June 30, 2024. The interest rate for the Stage 1 loan is the SOFR plus a margin of 0.80%. The interest rate related to 88.6% of the loan was hedged in 2015 with such rate currently at 4.896% until the last repayment in September 2024. Sales de Jujuy Pte Ltd has provided security in favor of Mizuho Bank over the shares it owns in SDJ SA and the Japan Organization for Metals and Energy Security, which covers 82.35% of the outstanding principal amount; and

•The Project Loan Facility for Stage 2 of the Olaroz project had an outstanding balance of $144.0 million as of June 30, 2024. The interest rate for the Stage 2 loan is a fixed rate of 2.6119% per annum until expiry in March 2029.

As of June 30, 2024, Arcadium had restricted cash of $24.6 million on deposit with Mizuho as collateral for the Project Loan Facility and classified within Other non-current assets in its condensed consolidated balance sheet.

As of June 30, 2024, Arcadium has reserved $108.0 million of its cash and cash equivalents in support of a guarantee to TTC associated with the Stage 2 Project Loan Facility for the Olaroz Plant. Arcadium would incur a 2.5% fee for permitted reductions to this reserve.

Affiliate Loans With TTC

SDJ SA has eleven loans with TTC related to the Olaroz Plant originally providing for a total of $93.0 million in principal. As of June 30, 2024, the loans have an outstanding principal balance of $81.5 million and are payable ranging from July 2024 until March 2030.

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Share-based Compensation

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

Share-based Compensation

Share-based Compensation

Arcadium Lithium plc Omnibus Incentive Plan (the "Arcadium Plan")

As of June 30, 2024, there were 64,548,000 Arcadium ordinary shares authorized for issuance under the Arcadium Plan. The Arcadium Plan provides for the grant of a variety of cash and equity awards to officers, directors, employees and consultants, including share options, restricted shares, restricted share units (including performance units), share appreciation rights, and management incentive awards. The Compensation Committee of the Arcadium Board of Directors (the "Arcadium Committee") has the authority to amend the Arcadium Plan at any time, approve financial targets, award grants, establish performance objectives and conditions and the times and conditions for payment of awards.

Share options granted under the Arcadium Plan may be incentive or non-qualified share options. The exercise price for share options may not be less than the fair market value of the share at the date of grant. Awards granted under the Arcadium Plan vest or become exercisable or payable at the time designated by the Arcadium Committee. The options granted in 2024 will vest on the first, second and third anniversaries of the date of grant, subject generally to continued employment, and cost is recognized over the vesting period. Incentive and non-qualified options granted under the Arcadium Plan expire not later than 10 years from the grant date.

Under the Arcadium Plan, awards of restricted share units ("RSUs") vest over periods designated by the Arcadium Committee. The RSUs granted in 2024 to employees will vest equally on the first, second and third anniversaries of the grant date, subject generally to continued employment, and cost is recognized over the vesting period. The RSUs granted to non-employee directors in 2024 vest at the Company's next annual meeting of shareholders following the grant date. Compensation cost is recognized over the vesting periods based on the market value of Arcadium ordinary shares on the grant date of the award.

Allkem Replacement Awards

Pursuant to the Transaction Agreement, the equity awards of Allkem (including performance rights) outstanding as of immediately prior to the closing of the Allkem Livent Merger were converted into equity awards denominated in shares of Arcadium ordinary shares. The Company issued time-based vesting restricted shares in connection with the conversion of such awards. The estimated fair value of the portion of the Allkem equity awards for which the required service period had been completed at the time of the closing of the Allkem Livent Merger was treated as purchase consideration. The remaining estimated fair value is recorded as compensation expense over the remainder of the service period associated with the awards. The Allkem Replacement Awards are authorized for issuance under the Arcadium Plan.

Legacy Livent Awards

As of June 30, 2024, there were 6,579,305 Arcadium ordinary shares authorized for issuance upon the exercise or settlement of the Legacy Livent Awards.

Share Compensation

We recognized the following share compensation expense for Legacy Livent Awards and awards under the Arcadium Plan:

	Three Months Ended June 30,		Six Months Ended June 30,
(in Millions)	2024
Share Option Expense, net of taxes of $0.1 and $0.2	$	0.8	$	1.2
Restricted Share Expense, net of taxes of $0.4 and $1.1	2.7		16.8
Performance-Based Restricted Share Expense, net of taxes of zero and less than $0.1	—		0.4
Total Share Compensation Expense, net of taxes of $0.5 and $1.3 (1)	$	3.5	$	18.4

____________________ 

(1)    Gross share compensation charges of $3.5 million and $0.5 million were recorded to Selling, general and administrative expenses and Restructuring and other charges, respectively, in our condensed consolidated statements of operations for the three months

ended June 30, 2024. Gross share compensation charges of $5.7 million and $14.0 million were recorded to Selling, general and administrative expenses and Restructuring and other charges, respectively, in our condensed consolidated statements of operations for the six months ended June 30, 2024.

Share Options

The grant date fair values of the share options granted in the six months ended June 30, 2024, were estimated using the Black-Scholes option valuation model, the key assumptions for which are listed in the table below. The expected volatility assumption is based on the historical volatility of a group of ten of our publicly traded peers that operate in the specialty chemical sector. The expected life represents the period of time that options granted are expected to be outstanding. The risk-free interest rate is based on U.S. Treasury securities with terms equal to the expected timing of share option exercises as of the grant date. The dividend yield assumption reflects anticipated dividends on Arcadium's ordinary shares. Arcadium share options granted in the six months ended June 30, 2024 will vest equally on the first, second and third anniversaries of the grant date and expire ten years from the date of grant.

The following summary shows Black Scholes valuation assumptions for Arcadium Plan share options granted in 2024: 

	Six months ended June 30, 2024
Grant date	3/6/2024	5/14/2024	6/28/2024
Expected dividend yield	—%	—%	—%
Expected volatility	31.18%	31.97%	33.00%
Expected life (in years)	6.0	6.0	6.0
Risk-free interest rate	4.08%	4.41%	4.28%

The weighted-average grant date fair value of share options granted during the six months ended June 30, 2024 was $1.92 per share.

The following summary shows share option activity for the Allkem Livent Merger and the Arcadium Plan for the six months ended June 30, 2024:

	Number of Options Granted But Not Exercised	Weighted-Average Remaining Contractual Life (in Years)	Weighted-Average Exercise Price Per Share		Aggregate Intrinsic Value (in Millions)
Outstanding December 31, 2023	5,060,687	5.6 years	$	6.73	$	6.5
Granted	3,877,317		$	4.92
Exercised	(53,056)		$	4.05	$	—
Forfeited	(2,610)		$	9.70
Outstanding at June 30, 2024	8,882,338	7.1	$	5.96	$	0.1
Exercisable at June 30, 2024	4,136,405	4.5	$	6.25	$	0.1

As of June 30, 2024, we had total remaining unrecognized compensation cost related to unvested share options of $7.8 million which will be amortized over the weighted-average remaining requisite service period of approximately 2.6 years.

Restricted Share Unit Awards

The grant date fair value of RSUs under the Arcadium Plan is based on the market price per share of Arcadium's ordinary shares on the date of grant, and the related compensation cost is amortized to expense on a straight-line basis over the vesting period during which the employees perform related services, which for the RSUs granted during the six months ended June 30, 2024, will vest equally on the first, second and third anniversaries of the grant date.

Pursuant to the Transaction Agreement, on the Acquisition Date, 927,510 employee RSUs vested on an accelerated pro rata basis. The following table shows RSU activity for the Allkem Livent Merger and the Arcadium Plan for the six months ended June 30, 2024:

	Restricted Share Units
	Number of awards	Weighted-Average Grant Date Fair Value		Aggregate Intrinsic Value (in Millions)
Nonvested December 31, 2023	2,287,088	$	7.83	$	17.1
Granted (1)	3,868,888	$	5.44
Vested (2)	(1,869,675)	$	7.19
Nonvested June 30, 2024	4,286,301	$	5.95	$	14.4

___________________

1.The Company granted 1,080,825 Allkem Replacement Awards on January 12, 2024 pursuant to the Transaction Agreement.

2.Immediately prior to the Acquisition Date, 768,440 non-employee Director RSUs vested and were paid out in cash of $5.3 million pursuant to the Transaction Agreement.

As of June 30, 2024, the Arcadium Plan had total remaining unrecognized compensation cost related to unvested RSUs of $17.9 million which will be amortized over the weighted-average remaining requisite service period of approximately 2.4 years.

Performance-Based Restricted Share Unit ("PRSU") Awards

Pursuant to the Transaction Agreement, on the Acquisition Date, 96,885 employee PRSUs vested on an accelerated basis at the higher of the PRSU payout on the accelerated vest date, which was —%, or 100%. The following table shows PRSU activity for the six months ended June 30, 2024.

	Performance-Based Restricted Share Units
	Number of awards	Weighted-Average Grant Date Fair Value		Aggregate Intrinsic Value (in Millions)
Nonvested as of December 31, 2023	96,885	$	9.42	$	0.7
Vested	(96,885)	$	9.42
Nonvested as of June 30, 2024	—	$	—	$	—

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Equity

6 Months Ended

Jun. 30, 2024

Equity [Abstract]

Equity

Equity

After the closing of the Allkem Livent Merger on January 4, 2024 and as of June 30, 2024, we had 5 billion ordinary shares of $1.00 par value each and 125 million preferred shares of $1.00 par value each authorized. The following is a summary of Arcadium's ordinary shares issued and outstanding:

	Issued	Treasury	Outstanding
Balance as of December 31, 2023 (1)	433,059,946	(263,669)	432,796,277
Issued to Allkem shareholders - Allkem Livent Merger	641,337,840	—	641,337,840
PRSU and RSU awards accelerated - Allkem Livent Merger	648,969	—	648,969
Arcadium RSU awards	155,706	—	155,706
Arcadium share option awards	8,497	—	8,497
Net sales of treasury shares - Arcadium NQSP	—	766	766
Balance as of June 30, 2024	1,075,210,958	(262,903)	1,074,948,055

_____________________

1.Balances outstanding as of December 31, 2023, representing predecessor Livent, have been adjusted to reflect the 2.406 Exchange Ratio.

Accumulated other comprehensive loss

Summarized below is the roll forward of accumulated other comprehensive loss, net of tax.

(in Millions)	Foreign currency adjustments		Derivative Instruments		Total
Accumulated other comprehensive loss, net of tax as of December 31, 2023	$	(49.8)	$	—	$	(49.8)
Other comprehensive (losses)/income before reclassifications	(30.5)		0.3		(30.2)
Accumulated other comprehensive loss, net of tax as of June 30, 2024	$	(80.3)	$	0.3	$	(80.0)

(in Millions)	Foreign currency adjustments		Derivative Instruments		Total
Accumulated other comprehensive loss, net of tax as of December 31, 2022	$	(51.0)	$	—	$	(51.0)
Other comprehensive income before reclassifications	0.5		0.6		1.1
Accumulated other comprehensive loss, net of tax as of June 30, 2023	$	(50.5)	$	0.6	$	(49.9)

Dividends

For the three and six months ended June 30, 2024 and 2023, we paid no dividends. We do not expect to pay any dividends in the foreseeable future.

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Earnings Per Share

6 Months Ended

Jun. 30, 2024

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

Earnings per ordinary share ("EPS") is computed by dividing net income by the weighted average number of common shares outstanding during the period on a basic and diluted basis.

Our potentially dilutive securities include potential ordinary shares related to our share options, restricted share units and 2025 Notes. See Note 12 to our consolidated financial statements in Part II, Item 8 of our 2023 Annual Report on Form 10-K for more information. Diluted earnings per share ("Diluted EPS") considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential ordinary shares would have an anti-dilutive effect. Diluted EPS excludes the impact of potential ordinary shares related to our share options in periods in which the option exercise price is greater than the average market price of our ordinary shares for the period. We use the if-converted method when calculating the potential dilutive effect, if any, of our 2025 Notes.

Earnings applicable to ordinary shares and ordinary shares used in the calculation of basic and diluted earnings per share are as follows:

(in Millions, Except Share and Per Share Data)	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023 (1)		2024		2023 (1)
Numerator:
Net income attributable to Arcadium Lithium plc	$	85.7	$	90.2	$	101.3	$	205.0
Denominator:
Weighted average ordinary shares outstanding - basic	1,074.9		432.3		1,064.2		432.2
Dilutive share equivalents from share-based plans	0.9		3.9		1.0		3.8
Dilutive share equivalents from 2025 Notes	67.7		67.7		67.7		67.7
Weighted average ordinary shares outstanding - diluted	1,143.5		503.9		1,132.9		503.7
Basic earnings per ordinary share	$	0.08	$	0.21	$	0.10	$	0.47
Diluted earnings per ordinary share	$	0.07	$	0.18	$	0.09	$	0.41

_____________________

1.For the three and six months ended June 30, 2023, weighted average ordinary shares outstanding - basic and diluted, dilutive share equivalents and basic and diluted earnings per ordinary share amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio.

Anti-dilutive share options

For the three and six months ended June 30, 2024, options to purchase 7,529,226 shares of our ordinary shares, at an average exercise price of $6.36 per share, were anti-dilutive and not included in the computation of diluted earnings per share because the exercise price of the options was greater than the average market price of the ordinary shares for the three and six months ended June 30, 2024. For the three and six months ended June 30, 2023, options to purchase 2,611 shares of our ordinary shares, at an average exercise price of $9.70 per share were anti-dilutive and not included in the computation of diluted earnings per share because the exercise price of the options was greater than the average market price of the ordinary shares for the three and six months ended June 30, 2023.

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Financial Instruments, Risk Management and Fair Value Measurements

6 Months Ended

Jun. 30, 2024

Fair Value Disclosures [Abstract]

Financial Instruments, Risk Management and Fair Value Measurements

Financial Instruments, Risk Management and Fair Value Measurements     

Our financial instruments include cash and cash equivalents, trade receivables, other current assets, investments held in trust fund, trade payables, derivatives and amounts included in accruals meeting the definition of financial instruments. Investments in the Arcadium NQSP deferred compensation plan trust fund are considered Level 1 investments based on readily available quoted prices in active markets for identical assets. The carrying value of cash and cash equivalents, trade receivables, other current assets, and trade payables approximates their fair value due to their short-term nature and are considered Level 1 investments. Our other financial instruments include the following:

Financial Instrument	Valuation Method
Foreign exchange forward contracts	Estimated amounts that would be received or paid to terminate the contracts at the reporting date based on current market prices for applicable currencies.

The estimated fair value of our foreign exchange forward contracts has been determined using standard pricing models which take into account the present value of expected future cash flows discounted to the balance sheet date. These standard pricing models utilize inputs derived from, or corroborated by, observable market data such as currency and commodity spot and forward rates.

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). The inputs used to measure fair value are classified into the following hierarchy:

Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2 - Unadjusted quoted prices in active markets for similar assets or liabilities, or unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability.

Level 3 - Unobservable inputs for the asset or liability.

The estimated fair value and the carrying amount of debt were $747.6 million and $634.0 million, respectively, as of June 30, 2024. Our 2025 Notes are classified as Level 2 in the fair value hierarchy.

Use of Derivative Financial Instruments to Manage Risk

We mitigate certain financial exposures connected to currency risk through a program of risk management that includes the use of derivative financial instruments. We enter into foreign exchange forward contracts to reduce the effects of fluctuating foreign currency exchange rates.

We formally document all relationships between hedging instruments and hedged items, as well as the risk management objective and strategy for undertaking various hedge transactions. This process includes relating derivatives that are designated as fair value or cash flow hedges to specific assets and liabilities on the balance sheet or to specific firm commitments or forecasted transactions. We also assess both at the inception of the hedge and on an ongoing basis, whether each derivative is highly effective in offsetting changes in fair values or cash flows of the hedged item. If we determine that a derivative is not highly effective as a hedge, or if a derivative ceases to be a highly effective hedge, we discontinue hedge accounting with respect to that derivative prospectively.

Foreign Currency Exchange Risk Management

We conduct business in many foreign countries, exposing earnings, cash flows, and our financial position to foreign currency risks. The majority of these risks arise as a result of foreign currency transactions. The primary currencies for which we have exchange rate exposure are the Euro, the British pound, the Chinese yuan, the Argentine peso, the Australian dollar, the Canadian dollar and the Japanese yen. We currently do not hedge foreign currency risks associated with the Argentine peso due to the limited availability and the high cost of suitable derivative instruments. Our policy is to minimize exposure to adverse changes in currency exchange rates. This is accomplished through a controlled program of risk management that could include the use of foreign currency debt and forward foreign exchange contracts. We also use forward foreign exchange contracts to hedge firm and highly anticipated foreign currency cash flows, with an objective of balancing currency risk to provide adequate protection from significant fluctuations in the currency markets.

Concentration of Credit Risk

Our counterparties to derivative contracts are primarily major financial institutions. We limit the dollar amount of contracts entered into with any one financial institution and monitor counterparties’ credit ratings. We also enter into master netting agreements with each financial institution, where possible, which helps mitigate the credit risk associated with our financial instruments. While we may be exposed to credit losses due to the nonperformance of counterparties, we consider this risk remote.

Accounting for Derivative Instruments and Hedging Activities

Cash Flow Hedges

We recognize all derivatives on the balance sheet at fair value. On the date we enter into the derivative instrument, we generally designate the derivative as a hedge of the variability of cash flows to be received or paid related to a forecasted transaction (cash flow hedge). We record in accumulated other comprehensive loss ("AOCL") changes in the fair value of derivatives that are designated as and meet all the required criteria for, a cash flow hedge. We then reclassify these amounts into earnings as the underlying hedged item affects earnings. In contrast, we immediately record in earnings changes in the fair value of derivatives that are not designated as cash flow hedges. As of June 30, 2024, we had open foreign currency forward contracts in AOCL in a net after-tax gain position of $0.4 million designated as cash flow hedges of underlying forecasted sales and purchases. As of June 30, 2024, we had open forward contracts with various expiration dates to buy, sell or exchange foreign currencies with a U.S. dollar equivalent of approximately $22.4 million.

A net after-tax gain of $0.4 million, representing open foreign currency exchange contracts, will be realized in earnings during the year ending December 31, 2024 if spot rates in the future are consistent with market rates as of June 30, 2024. The actual effect on earnings will be dependent on the actual spot rates when the forecasted transactions occur. We recognize derivative gains and losses in the Cost of sales line in the condensed consolidated statements of operations.

Derivatives Not Designated As Cash Flow Hedging Instruments

We hold certain forward contracts that have not been designated as cash flow hedging instruments for accounting purposes. Contracts used to hedge the exposure to foreign currency fluctuations associated with certain monetary assets and liabilities are not designated as cash flow hedging instruments and changes in the fair value of these items are recorded in earnings.

We had open forward contracts not designated as cash flow hedging instruments for accounting purposes with various expiration dates to buy, sell or exchange foreign currencies with a U.S. dollar equivalent of approximately $101.6 million as of June 30, 2024.

Fair Value of Derivative Instruments

The following table provides the gross fair value and net balance sheet presentation of our derivative instruments. The Company had no open derivative cash flow hedge contracts as of December 31, 2023.

	June 30, 2024
	Gross Amount of Derivatives
(in Millions)	Designated as Cash Flow Hedges
Derivative assets
Foreign exchange contracts	$	0.4
Total derivative assets (1)	0.4
Net derivative assets	$	0.4

__________________

1.Net balance is included in Prepaid and other current assets in the condensed consolidated balance sheets.

The following tables summarize the gains or losses related to our cash flow hedges and derivatives not designated as cash flow hedging instruments.

Derivatives in Cash Flow Hedging Relationships

(in Millions)	Total Foreign Exchange Contracts
Accumulated other comprehensive income, net of tax as of December 31, 2023	$	—
Unrealized hedging gains, net of tax	0.2
Total derivatives instruments impact on comprehensive income, net of tax	0.2
Accumulated other comprehensive income, net of tax as of March 31, 2024	$	0.2
Unrealized hedging gains, net of tax	0.1
Total derivatives instruments impact on comprehensive income, net of tax	0.1
Accumulated other comprehensive income, net of tax at June 30, 2024	$	0.3

(in Millions)	Total Foreign Exchange Contracts
Accumulated other comprehensive income, net of tax as of December 31, 2022	$	—
Unrealized hedging gains, net of tax	0.2
Total derivatives instruments impact on comprehensive income, net of tax	0.2
Accumulated other comprehensive income, net of tax as of March 31, 2023	$	0.2
Unrealized hedging gains, net of tax	0.4
Total derivatives instruments impact on comprehensive income, net of tax	0.4
Accumulated other comprehensive income, net of tax at June 30, 2023	$	0.6

Derivatives Not Designated as Cash Flow Hedging Instruments

	Location of Gain or (Loss) Recognized in Income on Derivatives	Amount of Pre-tax Gain or (Loss)  Recognized in Income on Derivatives (1)
		Three Months Ended June 30,				Six Months Ended June 30,
(in Millions)		2024		2023		2024		2023
Foreign Exchange contracts	Other gain/(loss)	$	2.5	$	(0.2)	$	13.1	$	1.9
Total		$	2.5	$	(0.2)	$	13.1	$	1.9

____________________

1.Amounts represent the gain or loss on the derivative instrument offset by the gain or loss on the hedged item.

Fair Value Measurements

Recurring Fair Value Measurements

The following tables present our fair-value hierarchy for those assets and liabilities measured at fair-value on a recurring basis in our condensed consolidated balance sheets.

(in Millions)	June 30, 2024		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in deferred compensation plan (1)	$	6.3	$	6.3	$	—	$	—
JEMSE Receivable	5.0		—		—		5.0
Equity securities (2)	1.8		1.8		—		—
Derivatives – Foreign exchange	0.4		—		0.4		—
Total Assets	$	13.5	$	8.1	$	0.4	$	5.0
Liabilities
Deferred compensation plan obligation (3)	$	7.2	$	7.2	$	—	$	—
Total Liabilities	$	7.2	$	7.2	$	—	$	—

(in Millions)	December 31, 2023		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in deferred compensation plan (1)	$	4.1	$	4.1	$	—	—
Total Assets	$	4.1	$	4.1	$	—	$	—
Liabilities
Deferred compensation plan obligation (3)	$	6.7	$	6.7	$	—	$	—
Total Liabilities (4)	$	6.7	$	6.7	$	—	$	—

____________________

1.Balance is included in Investments in the condensed consolidated balance sheets. Arcadium NQSP investments in Arcadium ordinary shares are recorded as Treasury shares in the condensed consolidated balance sheets and carried at historical cost. Mark-to-market gains of $0.3 million and $1.1 million were recorded for the three and six months ended June 30, 2024, respectively. Mark-to-market losses of $0.6 million and $0.8 million were recorded for the three and six months ended June 30, 2023, related to the Arcadium ordinary shares. The mark-to-market gains and losses were recorded in Selling, general and administrative expenses in the condensed consolidated statements of operations, with a corresponding offset to the deferred compensation plan obligation in the condensed consolidated balance sheets.

2.Mark-to-market gains and losses are recorded to Other gain/loss in the condensed consolidated statement of operations.

3.Balance is included in Other long-term liabilities in the condensed consolidated balance sheets.

4.The Company had no open cash flow hedge contracts as of December 31, 2023.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Contingencies

We are a party to various legal proceedings, certain of these matters are discussed below. Arcadium records liabilities for estimated losses from contingencies when information available indicates that a loss is probable and the amount of the loss, or range of loss, can be reasonably estimated. As additional information becomes available, management adjusts its assessments and estimates. Legal costs are expensed as incurred.

In addition to the legal proceedings noted below, we have certain contingent liabilities arising in the ordinary course of business. Some of these contingencies are known but are so preliminary that the merits cannot be determined, or if more advanced, are not deemed material based on current knowledge; and some are unknown - for example, claims with respect to which we have no notice or claims which may arise in the future from products sold, guarantees or warranties made, or indemnities provided. Therefore, we are unable to develop a reasonable estimate of our potential exposure of loss for these contingencies, either individually or in the aggregate, at this time. There can be no assurance that the outcome of these contingencies will be favorable, and adverse results in certain of these contingencies could have a material adverse effect on the consolidated financial position, results of operations in any one reporting period, or liquidity.

Argentine Customs & Tax Authority Matters

Minera del Altiplano SA, our subsidiary in Argentina ("MdA"), has received notices from the Argentine Customs Authorities that they are conducting customs audits in Salta (for 2015 to 2019, 2021 and 2022), Rosario (for 2016 and 2017), Buenos Aires and Ezeiza (for 2018, 2019, 2021 and 2022) regarding the export of lithium carbonate by MdA from each of those locations. See Note 21 for more information about the payment the Company made in June 2023 for export duties and interest claimed by the Customs Authorities of Buenos Aires, Ezeiza and Salta related to exports made between the years 2018 – 2022.

Sales de Jujuy S.A., our subsidiary in Argentina ("SDJ SA") has received a notice from the Argentine Customs Authority regarding custom duties for the export of lithium carbonate by SDJ SA from January 2022 through August 2023.

SDJ SA also received notification from Jujuy provincial tax authority regarding a royalty adjustment in favor of the Province for the periods 2021 and 2022.

A range of reasonably possible liabilities, if any, cannot be currently estimated by the Company.

MdA was also notified from the Argentine Tax Authority of the start of transfer pricing audits for the periods 2017 and 2018. SDJ SA was also notified by the Argentine Tax Authority of the start of a transfer pricing audit for the period of 2018.

In January, 2023, the Argentina Ministry of Economy issued a resolution to cancel an export rebate regime relating to lithium products, which was followed by Presidential Decree No. 57/2023 in February, 2023. The Presidential Decree prospectively cancels all export rebates for lithium products. Prior to the Presidential Decree, MdA had the right to collect 4% of the FOB value for exported products (which consisted of the "La Puna" rebate which was 2.5% and the "Export" rebate which was 1.5%). In October 2023 by Presidential Decree No. 557/2023 the Export rebate of 1.5% was reinstated. Subsequent to the Presidential Decree entering into force on October 26, 2023 MdA is entitled to the 1.5% rebate/refund on FOB value of its exported products. As of June 30, 2024, MdA has a receivable of approximately $4.5 million USD which is still valid and remains in force after the Presidential Decrees.

A range of possible liabilities, if any, cannot be currently estimated by the Company.

Australia Tax Matters

We were informed on April 16, 2024 that the Australian Taxation Office will be performing a combined assurance review of Allkem Limited and its Australian subsidiaries for the period of July 1, 2019 to June 30, 2023.

Canada Tax Matters

We were notified that Nemaska Lithium has received certain audit queries from the Canada Revenue Agency ("CRA") related to the Approval and Vesting Order (the "RVO") issued under the Companies' Creditors Arrangement Act ("CCAA") on October 15, 2020, by the Superior Court of Québec. Nemaska Lithium has been responding to those queries.

Leases

All of our leases are operating leases as of June 30, 2024 and December 31, 2023. We have operating leases for corporate offices, manufacturing facilities, and land. Our leases have remaining lease terms of two to twenty-seven years.

The Company assumed an ROU asset and corresponding lease liability of $53.4 million in the Allkem Livent Merger, all of which are accounted for as operating leases.

Quantitative disclosures about our leases are summarized in the table below.

	Three Months Ended June 30,				Six Months Ended June 30,
(in Millions, except for weighted-average amounts)	2024		2023		2024		2023
Lease Cost
Operating lease cost	$	4.2	$	0.3	$	8.5	$	0.6
Short-term lease cost	0.1		0.1		0.2		0.2
Total lease cost (1)	$	4.3	$	0.4	$	8.7	$	0.8
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Cash paid for operating leases	$	3.8	$	0.4	$	8.2	$	0.7

__________________________

1.Lease expense is classified as Selling, general and administrative expenses in our condensed consolidated statements of operations.

As of June 30, 2024, our operating leases had a weighted average remaining lease term of 8.2 years and a weighted average discount rate of 8.6%.

The table below presents a maturity analysis of our operating lease liabilities for each of the next five years and a total of the amounts for the remaining years.

(in Millions)	Undiscounted cash flows
Remainder of 2024	$	7.3
2025	9.9
2026	9.1
2027	8.3
2028	8.1
Thereafter	31.1
Total future minimum lease payments	73.8
Less: Imputed interest	(19.8)
Total	$	54.0

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Supplemental Information

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Information

Supplemental Information

The following tables present details of prepaid and other current assets, other assets, accrued and other current liabilities, and other long-term liabilities as presented on the condensed consolidated balance sheets:

(in Millions)	June 30, 2024		December 31, 2023
Prepaid and other current assets
Tax related items	$	113.6	$	29.5
Prepaid expenses	66.3		16.9
Argentina government receivable (1)	15.1		7.9
Other receivables	63.6		28.2
Bank Acceptance Drafts (2)	1.2		—
Derivative assets (Note 17)	0.4		—
Other current assets	3.8		3.9
Total	$	264.0	$	86.4

(in Millions)	June 30, 2024		December 31, 2023
Other assets
Argentina government receivable (1), (3)	$	128.8	$	71.3
Advance to contract manufacturers (4)	26.1		27.6
Long-term semi-finished goods inventory	137.4		1.0
Tax related items	4.0		4.0
Capitalized software, net	1.5		1.1
Other assets	44.5		22.7
Total	$	342.3	$	127.7

_________________

1.We have various subsidiaries that conduct business in Argentina. As of June 30, 2024 and December 31, 2023, $39.3 million and $38.8 million, respectively, of outstanding receivables due from the Argentina government, which primarily represent export tax and export rebate receivables, was denominated in U.S. dollars. A recent judicial decision relating to the U.S. dollar-denominated export tax receivable portion ($34.8 million) permits the Argentina government to reimburse us in Argentine pesos at the historical foreign exchange rate applicable at each past payment date, adjusted by a bank deposit interest rate. While Arcadium filed an appeal on November 6, 2023 and believes it has valid defenses on the technical merits, the ultimate resolution of this matter could result in a possible loss of up to $34.3 million. We continually review the recoverability of all outstanding receivables by analyzing historical experience, current collection trends and regional business and political factors among other factors.

2.Bank Acceptance Drafts are a common Chinese finance note used to settle trade transactions. The Company accepts these notes from Chinese customers based on criteria intended to ensure collectability and limit working capital usage.

3.In June 2023, the Company decided to pay $21.7 million for the export duties and interest claimed by the Customs Authorities of Buenos Aires, Ezeiza and Salta related to exports made between the years 2018 – 2022 registered in those locations. This payment stops the accrual of any further interest. It was a deposit made under protest and was not an admission of any of the claims made by the Customs Authorities or a waiver of any of the Company's defenses, including recovery of the deposit plus interest. The cases remain in discussion. See Note 20 for more information.

4.We record deferred charges for certain contract manufacturing agreements which we amortize over the term of the underlying contract.

(in Millions)	June 30, 2024		December 31, 2023
Accrued and other current liabilities
Accrued payroll	$	56.3	$	31.2
Retirement liability - 401k	4.6		3.2
Environmental reserves, current	3.0		0.5
Severance	1.6		1.7
Accrued investment in unconsolidated affiliates	—		27.0
Other accrued and other current liabilities (1)	94.3		73.2
Total	$	159.8	$	136.8

(in Millions)	June 30, 2024		December 31, 2023
Other long-term liabilities
Deferred compensation plan obligation	$	7.2	$	6.7
Contingencies related to uncertain tax positions (2)	16.2		6.2
Self-insurance reserves	1.1		1.1
Asset retirement obligations	11.3		3.7
Other long-term liabilities	53.6		3.6
Total	$	89.4	$	21.3

____________________

1.Amounts primarily include accrued capital expenditures related to our expansion projects.

2.As of June 30, 2024, we have recorded a liability for uncertain tax positions of $15.8 million and a $0.4 million indemnification liability where the offsetting uncertain tax position is with FMC, per the tax matters agreement.

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Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023		Jun. 30, 2024	Jun. 30, 2023
Pay vs Performance Disclosure
Net income attributable to Arcadium Lithium plc	$ 85.7	$ 90.2	[1]	$ 101.3	$ 205.0	[1]

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

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Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

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Significant Accounting Policies and Related Financial Information (Policies)

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Principal Accounting Policies and Related Financial Information

The accompanying condensed consolidated financial statements were prepared in accordance with the requirements of the Securities and Exchange Commission ("SEC") for interim reporting. As permitted under those rules, certain notes or other financial information that are normally required by U.S. GAAP have been condensed or omitted from these interim financial statements.

Reclassifications

Reclassifications

Certain prior period balances have been reclassified to conform to the current period presentation in the condensed consolidated financial statements and the accompanying notes.

Effective April 1, 2024, we began presenting gains and losses from foreign currency remeasurements as a component of Other gains/losses. Prior to April 1, 2024, we included gains and losses resulting from foreign currency remeasurements as a component of Cost of sales and Restructuring and other charges in the condensed consolidated statement of operations.

Segment information

Segment Information

In January 2024, Arcadium Lithium completed the Allkem Livent Merger. See Note 4, Allkem Livent Merger for further details. Following the closing of the Allkem Livent Merger, we currently operate as one reportable segment based on the commonalities among our products and services. As integration evolves, we will continue to assess this determination.

Revenue Recognition

Revenue Recognition

Revenue from product sales is recognized when we satisfy a performance obligation by transferring the promised goods to a customer, that is, when control of the good transfers to the customer. Payment terms generally range from 20 to 180 days.

In determining when the control of goods is transferred, we typically assess, among other things, the transfer of title and risk of loss and the shipping terms of the contract.

We record amounts billed for shipping and handling fees as revenue. Costs incurred for shipping and handling are recorded in cost of sales. When we perform shipping and handling activities after the transfer of control to the customer (e.g., when control transfers prior to delivery), they are considered fulfillment activities, and accordingly, the costs are accrued to cost of sales when the related revenue is recognized.

Amounts billed for sales and use taxes, VAT, and certain excise and other specific transactional taxes imposed on revenue-producing transactions are presented on a net basis and excluded from revenue in the condensed consolidated statements of operations. We record a liability until remitted to the respective taxing authority.

We satisfy our obligations by transferring goods and services in exchange for consideration from customers. The timing of performance sometimes differs from the timing the associated consideration is received from the customer, thus resulting in the recognition of a contract asset or liability. These may arise from provisional pricing within certain of our customer contracts, or if the customer’s payment of consideration is received prior to completion of our related performance obligation. Provisional pricing results in variable consideration which we estimate by using an expected value method taking into account all information that is reasonably available including publicly available pricing forecasts. We only include variable consideration within the transaction price to the extent that it is probable that a significant reversal in the amount of revenue recognized will not occur.

Performance obligations

Occasionally, we may enter into multi-year take or pay supply agreements with customers. The aggregate amount of revenue expected to be recognized related to these contracts’ performance obligations is approximately $1.7 billion in the next five years. Based on our past experience with the customers under these arrangements, we expect to continue recognizing revenue in accordance with the contracts as we transfer control of the product to the customer. However, in the case a shortfall of volume purchases occurs, we will recognize the amount payable by the customer over the remaining performance obligations in the contract.

Equity method investments

Equity method investments

We stop applying the equity method when we have reduced the value of our equity method investment, commitments and additional investments (i.e., loans or advances) in the investee to zero. If the investee subsequently reports net income, we resume applying the equity method when our share of that net income is equal to the suspended losses (i.e., our share of the investee's net losses not previously recognized).

If facts and circumstances indicate that a decrease in value of the investment has occurred that is other than temporary, we recognize an impairment loss equal to an amount by which the carrying amount exceeds the fair value of the equity method investment.

Goodwill

Goodwill

The Company accounts for goodwill and other intangibles acquired in a business combination in conformity with current accounting guidance that requires that goodwill and indefinite-lived intangible assets not be amortized.

Under the guidance, goodwill is tested for impairment by comparing the estimated fair value of reporting units to the related carrying value. Reporting units are either operating business segments or one level below operating business segments for which discrete financial information is available and for which operating results are regularly reviewed by the business management. In applying the goodwill impairment test, a qualitative test ("Step 0") is initially performed, under which qualitative factors are assessed to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. Qualitative factors may include, but are not limited to, economic conditions, industry and market considerations, cost factors, overall financial performance of the reporting units and other entity and reporting unit specific events. If after assessing these qualitative factors, it is determined that it is "more-likely-than-not" that the fair value of the reporting unit is less than the carrying value, a quantitative test ("Step 1") is performed. During Step 1, the fair value is estimated using a discounted cash flow model.

Impairment evaluations of goodwill could result in a reduction in our recorded asset values which could have a material adverse effect on our financial position and results of operations. We perform reviews of goodwill on an annual basis, or more frequently if triggering events indicate a possible impairment. We test goodwill at the reporting unit level by comparing the carrying value of the net assets of the reporting unit, including goodwill, to the reporting unit's fair value. If the carrying values of goodwill exceed their fair value, the goodwill would be considered impaired. If any impairment or related charge is warranted, our financial position and results of operations could be materially affected. Any such impairment or related charge could be a result of, for example, sustained declines in the Company’s stock price; the deterioration of the cost of equity or debt capital increases due to valuations for comparable companies or comparable acquisitions valuations; or the deterioration of the outlook for future cash flows for the reporting unit due to but not limited to, increased competition, changes to discount rate, downward forecast revisions, restricted plans or changes in applicable regulations affecting our business.

Mine Development Costs and Mineral Interests

Mine Development Costs

Mine development costs include: a) exploration and evaluation ("E&E") expenditures incurred during the search for mineral resources as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource; and b) stripping costs of removing overburden and waste materials to access the mineral body at an open pit mine.

The Company capitalizes E&E expenditures to PP&E under a successful efforts basis when proven and probable reserves are established for the sites where E&E activities are being performed. E&E assets recognized as part of business combinations are also capitalized. All other E&E expenditures are expensed.

Stripping costs incurred prior to the production phase are capitalized to PP&E during the development of an open pit mine. When multiple open pits exist at a mining complex utilizing common processing facilities, such pre-production stripping costs are capitalized at each pit. The removal, production, and sale of de minimis saleable materials may occur during the development phase of an open pit mine and are assigned incremental mining costs related to the removal of that material. The production phase of an open pit mine commences when saleable minerals, beyond a de minimis amount, are produced. Stripping costs incurred during the production phase of a mine are variable production costs that are included as a component of inventory to be recognized in Cost of sales in the same period as the revenue from sale of that inventory.

Capitalized mine development costs are amortized using the units-of-production method based on estimated recoverable minerals in proven and probable reserves, and are amortized over the estimated life of the mineral body.

Mineral Interests

Mineral interests include acquired interests in production, development and exploration stage properties. Mineral interests are capitalized at their fair value at the acquisition date, either as an individual asset purchase or as part of a business combination. Mineral interests in the development and exploration stage are not amortized until the underlying property is converted to the production stage, at which point the mineral interests are amortized over the estimated recoverable proven and probable reserves using a units-of-production method.

Asset Retirement Obligations

Asset Retirement Obligations

The Company accounts for asset retirement obligations ("AROs") in accordance with ASC 410-20, Asset Retirement Obligations "ASC 410-20". We record AROs at present value at the time the liability is incurred if we can reasonably estimate the settlement date. The associated AROs are capitalized as part of the carrying amount of related long-lived assets. In future periods, the liability is accreted to its present value and the capitalized cost is depreciated over the useful life of the related asset. We also adjust the liability for changes resulting from the passage of time and/or revisions to the timing or the amount of the original estimate. Upon retirement of the long-lived asset, we settle the obligation for its recorded amount.

Recently Issued and Adopted Accounting Pronouncements and Regulatory Items

In December 2023, the Financial Accounting Standard Board ("FASB") issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU enhances existing income tax disclosures to better assess how an entity's operation and related tax risks, tax planning, and operational opportunities affect its tax rate and prospects for future cash flows. The ASU is effective for annual periods beginning after December 15, 2024. We are currently evaluating the effect the guidance will have on our condensed consolidated financial statements.

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU improves reportable segment disclosure requirements, primarily through enhanced disclosures related to significant segment expenses. The ASU is effective for annual periods beginning after December 15, 2023, and interim periods beginning after December 15, 2024. We are currently evaluating the effect the guidance will have on our condensed consolidated financial statements.

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Significant Accounting Policies and Related Financial Information (Tables)

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Impact of Reclassifications

The following tables summarize the accounts that were recast for the three and six months ended June 30, 2023 and the three months ended March 31, 2024 to conform to the current period presentation.

	Three Months Ended June 30,						Six Months Ended June 30
	2023						2023
(in Millions)	Prior Presentation		Loss/(gain) Reclassified		Recast Presentation		Prior Presentation		Loss/(gain) Reclassified		Recast Presentation
Cost of sales	$	92.4	$	3.9	$	88.5	$	179.9	$	5.1	$	174.8
Restructuring and other charges	24.2		(0.1)		24.3		26.1		(0.2)		26.3
Other (gains)/losses	(11.4)		3.8		(7.6)		(11.4)		4.9		(6.5)

	Three Months Ended March 31,
	2024
(in Millions)	Prior Presentation		(Gain)/loss Reclassified		Recast Presentation
Cost of sales	$	116.8	$	(38.0)	$	154.8
Restructuring and other charges	$	83.6	$	3.8	$	79.8
Other (gains)/losses	$	(43.1)	$	(34.2)	$	(77.3)

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Allkem Livent Merger (Tables)

6 Months Ended

Jun. 30, 2024

Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]

Schedule of Consideration Transferred

The Acquisition Date fair value of consideration transferred consisted of the following:

(in millions)	Amount
Consideration:
Fair value of Arcadium ordinary shares issued to Allkem shareholders	$	4,385.6
Fair value of converted Allkem performance rights attributable to pre-combination service	4.8
Total consideration	$	4,390.4

Schedule of Purchase Price Allocation

The following table summarizes the preliminary purchase price allocation for the Allkem Livent Merger as of January 4, 2024, which is subject to change:

(in Millions, except per share amounts)	Amount
Total consideration	$	4,390.4
Assets acquired:
Cash and cash equivalents	$	681.4
Trade receivables	64.2
Inventories	121.3
Prepaid and other current assets	87.2
Property, plant and equipment	4,326.1
Right of use assets - operating leases, net	53.4
Deferred income tax assets	26.3
Other assets (1)	192.9
Total assets acquired	$	5,552.8
Liabilities assumed:
Accounts payable, trade and other	$	223.7
Accrued and other current liabilities	35.1
Income taxes	78.5
Long-term debt including current portion	301.7
Operating lease liabilities - long-term	53.4
Environmental liabilities	9.8
Deferred income tax liabilities	1,315.3
Other long-term liabilities	49.5
Total liabilities assumed	$	2,067.0
Fair value of net assets acquired	$	3,485.8
Add: Fair value of noncontrolling interests acquired	275.0
Fair value of net assets acquired less noncontrolling interests acquired	$	3,210.8
Goodwill	$	1,179.6

___________________

1.Includes long-term semi-finished goods inventory.

Schedule of Pro Forma Information

The following table represents Allkem's revenues and net earnings included in Arcadium's condensed consolidated statements of operations from the Acquisition Date through June 30, 2024.

(in Millions)	Three Months Ended June 30,		Six Months Ended June 30,
	2024
Revenue	$	83.8	$	186.3
Income from operations before income taxes	$	75.8	$	152.2

The unaudited pro forma financial results are as follows:

(in Millions)	Three Months Ended June 30,		Six Months Ended June 30,
	2023
	(Unaudited)
Revenue	$	569.8	$	1,139.2
Net income	278.4		$	513.4

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Goodwill (Tables)

6 Months Ended

Jun. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table summarizes the changes in goodwill for the six months ended June 30, 2024.

(in Millions)	Allkem		Nemaska Lithium		Total
Balance as of December 31, 2023	$	—	$	120.7	$	120.7
Acquisitions - Allkem Livent Merger	1,189.2		—		1,189.2
Measurement period adjustments	(9.6)		—		(9.6)
Balance as of June 30, 2024	$	1,179.6	$	120.7	$	1,300.3

See Note 4 for further details.

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Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table provides information about disaggregated revenue by major geographical region:

(in Millions)	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Asia Pacific (1)	$	211.8	$	171.6	$	431.9	$	338.6
North America (1)	22.8		40.7		43.5		92.6
Europe, Middle East & Africa	19.5		23.5		39.1		56.3
Latin America	0.4		—		1.2		1.8
Consolidated Revenue	$	254.5	$	235.8	$	515.7	$	489.3

1.During the three months ended June 30, 2024, countries with sales in excess of 10% of consolidated revenue consisted of China and Japan. Sales for the three months ended June 30, 2024 for China and Japan totaled $155.1 million and $31.8 million, respectively. During the six months ended June 30, 2024, countries with sales in excess of 10% of consolidated revenue consisted of China, Japan, and South Korea. Sales for the six months ended June 30, 2024 for China, Japan, and South Korea totaled $281.0 million, $77.8 million, and $64.9 million, respectively. During the three months ended June 30, 2023, countries with sales in excess of 10% of consolidated revenue consisted of China, Japan, the U.S., and South Korea. Sales for the three months ended June 30, 2023 for China, Japan, the U.S., and South Korea totaled $90.8 million, $42.7 million, $39.9 million, and $31.2 million, respectively. During the six months ended June 30, 2023, countries with sales in excess of 10% of consolidated revenue consisted of China, the U.S., Japan, and South Korea. Sales for the six months ended June 30, 2023 for China, the U.S., Japan, and South Korea, totaled $179.2 million, $90.1 million, $76.1 million, and $66.3 million, respectively.

The following table provides information about disaggregated revenue by major product category:

(in Millions)	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Lithium Hydroxide	$	113.1	$	153.6	$	223.7	$	306.3
Lithium Carbonate (1)	72.7		5.1		152.5		14.5
Butyllithium and Other Lithium Specialties	44.9		77.1		90.9		168.5
Spodumene Concentrate (2)	23.8		—		48.6		—
Consolidated Revenue	$	254.5	$	235.8	$	515.7	$	489.3

______________________

1.Includes lithium carbonate by-product revenue.

2.Includes low-grade spodumene sales and minimal other products.

Schedule of Receivables and Contract Liabilities

The following table presents the opening and closing balances of our contract liabilities and current trade receivables, net of allowances from contracts with customers.

(in Millions)	Balance as of June 30, 2024		Balance as of December 31, 2023		(Decrease)/increase
Receivables from contracts with customers, net of allowances	$	94.1	$	106.7	$	(12.6)
Contract liability - short-term	37.1		4.4		32.7
Contract liability - long-term	253.8		217.8		36.0

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Inventories, Net (Tables)

6 Months Ended

Jun. 30, 2024

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
Finished goods	$	130.3	$	59.1
Semi-finished goods	101.4		108.8
Raw materials, supplies, and other	101.4		49.6
Inventory, net	$	333.1	$	217.5

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Investments (Tables)

6 Months Ended

Jun. 30, 2024

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Investments in and Advances to Affiliates, Schedule of Investments

Investments consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
ESM ILiAD, LLC	$	30.1	$	30.1
Arcadium NQSP	6.3		4.7
Other	1.8		—
Investments	$	38.2	$	34.8

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Property, Plant and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2024

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment consisted of the following:

(in Millions)	June 30, 2024		December 31, 2023
Land and land improvements	$	319.8	$	106.2
Buildings	896.7		134.9
Machinery and equipment	735.0		420.7
Mineral rights	3,280.0		560.0
Construction in progress	2,111.2		1,284.4
Total cost	$	7,342.7	$	2,506.2
Accumulated depreciation	(307.8)		(269.1)
Property, plant and equipment, net	$	7,034.9	$	2,237.1

The major classifications of property, equipment and software, including their respective principal depreciation and amortization method and expected useful lives, consisted of the following:

Asset type	Depreciation and amortization method	Useful Life
Land	N/A	—
Land improvements	Straight-line	20 years
Buildings	Straight-line	20-40 years
Mineral rights	Units-of-production	Based on rate of depletion of reserves
Mining extraction equipment	Units-of-production	Based on rate of depletion of reserves
Leased plant and equipment	Straight-line	Lease period (1-10.5 years)
Other machinery and equipment	Straight-line	3-18 years
Software	Straight-line	3-10 years

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Restructuring and Other Charges (Tables)

6 Months Ended

Jun. 30, 2024

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Charges and Asset Disposals

The following table shows other charges included in Restructuring and other charges in the condensed consolidated statements of operations:

	Three Months Ended June 30,				Six Months Ended June 30,
(in Millions)	2024		2023		2024		2023
Restructuring charges:
Severance-related and exit costs	$	3.2	$	0.7	$	14.1	$	2.4
Other charges:
Costs related to the Allkem Livent Merger	19.8		18.8		86.8		18.8
Bessemer City plant fire loss	—		5.0		—		5.0
Other	(1.1)		(0.2)		0.8		0.1
Total Restructuring and other charges	$	21.9	$	24.3	$	101.7	$	26.3

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Other gains (Tables)

6 Months Ended

Jun. 30, 2024

Other Income and Expenses [Abstract]

Schedule of Other gains

The following table shows amounts included in Other gains in the condensed consolidated statements of operations:

	Three Months Ended June 30,				Six Months Ended June 30,
(in Millions)	2024		2023		2024		2023
Blue Chip Swap gains: (1)
Non-recurring - SDV SA and MdA Holdings LLC (2)	$	16.8	$	11.4	$	36.5	$	11.4
Recurring - SDJ and MdA	4.1		—		14.0		—
Total Blue Chip Swap gains	20.9		11.4		50.5		11.4
Foreign currency remeasurement gains/(losses):
Remeasurement gains on U.S. dollar denominated cash held by foreign currency functional subsidiary	0.4		—		14.3		—
All other foreign currency remeasurement gains/(losses) (3)	58.6		(3.8)		92.8		(4.9)
Total Foreign currency remeasurement gains/(losses)	59.0		(3.8)		107.1		(4.9)
Loss on trading securities	—		—		(0.4)		—
Total Other gains	$	79.9	$	7.6	$	157.2	$	6.5

___________________________

1.See Note 2 for details.

2.Represents the non-recurring gain from the sale in Argentina pesos of Argentina Sovereign U.S. dollar-denominated bonds due to the divergence of Argentina's Blue Chip Swap market exchange rate from the official rate.

3.The three and six months ended June 30, 2024 primarily includes impact of currency fluctuations on deferred income tax assets and liabilities related to the Allkem Livent Merger.

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Debt (Tables)

6 Months Ended

Jun. 30, 2024

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt consists of the following:

	Interest Rate Percentage			Maturity Date	June 30, 2024		December 31, 2023
(in Millions)	SOFR borrowings	Base rate borrowings
Revolving Credit Facility (1)	7.19%	9.25%		2027	$	—	$	—
4.125% Convertible Senior Notes due 2025			4.125%	2025	245.8		245.8
Transaction costs - 2025 Notes					(1.6)		(2.4)
Nemaska - Prepayment agreement - tranche 1 (2)			8.9%		75.0		75.0
Discount - Prepayment agreement					(19.4)		(19.8)
Nemaska - Prepayment agreement - tranche 2 (2)			9.4%		150.0		—
Discount - Prepayment agreement					(53.4)		—
Nemaska - Other					0.5		3.4
Debt assumed in Allkem Livent Merger (3)
Project Loan Facility - Stage 1 of Olaroz Plant			4.90%	2024	9.1		—
Project Loan Facility - Stage 2 of Olaroz Plant			2.61%	2029	144.0		—
Affiliate Loans with TTC			15.25%	2030	81.5		—
Affiliate Loan with TLP			10.34%	2026	2.5		—
Total debt assumed in Allkem Livent Merger					237.1		—
Subtotal long-term debt (including current maturities)					634.0		302.0
Less current maturities					(43.4)		(2.4)
Total long-term debt					$	590.6	$	299.6

______________________________

1.As of June 30, 2024 and December 31, 2023, there were $20.6 million and $15.5 million, respectively, in letters of credit outstanding under our Revolving Credit Facility and $479.4 million and $484.5 million available funds as of June 30, 2024 and December 31, 2023, respectively. Fund availability is subject to the Company meeting its debt covenants.

2.Represents advance payments in connection with customer supply agreement which do not have a contractual interest rate or bear any actual interest and are repayable in equal quarterly installments beginning in January 2027 and ending in October 2031. Represents U.S. GAAP imputed interest rate.

3.On May 30, 2024, SDV SA paid the outstanding principal balance of $47.0 million, a prepayment fee of $0.9 million and accrued interest and commitment fees of $1.3 million to repay the Sal de Vida Project Financing Facility in its entirety.

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Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

We recognized the following share compensation expense for Legacy Livent Awards and awards under the Arcadium Plan:

	Three Months Ended June 30,		Six Months Ended June 30,
(in Millions)	2024
Share Option Expense, net of taxes of $0.1 and $0.2	$	0.8	$	1.2
Restricted Share Expense, net of taxes of $0.4 and $1.1	2.7		16.8
Performance-Based Restricted Share Expense, net of taxes of zero and less than $0.1	—		0.4
Total Share Compensation Expense, net of taxes of $0.5 and $1.3 (1)	$	3.5	$	18.4

____________________ 

(1)    Gross share compensation charges of $3.5 million and $0.5 million were recorded to Selling, general and administrative expenses and Restructuring and other charges, respectively, in our condensed consolidated statements of operations for the three months

ended June 30, 2024. Gross share compensation charges of $5.7 million and $14.0 million were recorded to Selling, general and administrative expenses and Restructuring and other charges, respectively, in our condensed consolidated statements of operations for the six months ended June 30, 2024.

Schedule of Black Scholes Valuation Assumptions for Stock Option Grants

Black Scholes valuation assumptions for Arcadium Plan share options granted in 2024: 

	Six months ended June 30, 2024
Grant date	3/6/2024	5/14/2024	6/28/2024
Expected dividend yield	—%	—%	—%
Expected volatility	31.18%	31.97%	33.00%
Expected life (in years)	6.0	6.0	6.0
Risk-free interest rate	4.08%	4.41%	4.28%

Schedule of Stock Option Activity

The following summary shows share option activity for the Allkem Livent Merger and the Arcadium Plan for the six months ended June 30, 2024:

	Number of Options Granted But Not Exercised	Weighted-Average Remaining Contractual Life (in Years)	Weighted-Average Exercise Price Per Share		Aggregate Intrinsic Value (in Millions)
Outstanding December 31, 2023	5,060,687	5.6 years	$	6.73	$	6.5
Granted	3,877,317		$	4.92
Exercised	(53,056)		$	4.05	$	—
Forfeited	(2,610)		$	9.70
Outstanding at June 30, 2024	8,882,338	7.1	$	5.96	$	0.1
Exercisable at June 30, 2024	4,136,405	4.5	$	6.25	$	0.1

Schedule of Restricted Award Activity

The following table shows RSU activity for the Allkem Livent Merger and the Arcadium Plan for the six months ended June 30, 2024:

	Restricted Share Units
	Number of awards	Weighted-Average Grant Date Fair Value		Aggregate Intrinsic Value (in Millions)
Nonvested December 31, 2023	2,287,088	$	7.83	$	17.1
Granted (1)	3,868,888	$	5.44
Vested (2)	(1,869,675)	$	7.19
Nonvested June 30, 2024	4,286,301	$	5.95	$	14.4

___________________

1.The Company granted 1,080,825 Allkem Replacement Awards on January 12, 2024 pursuant to the Transaction Agreement.

2.Immediately prior to the Acquisition Date, 768,440 non-employee Director RSUs vested and were paid out in cash of $5.3 million pursuant to the Transaction Agreement.

The following table shows PRSU activity for the six months ended June 30, 2024.

	Performance-Based Restricted Share Units
	Number of awards	Weighted-Average Grant Date Fair Value		Aggregate Intrinsic Value (in Millions)
Nonvested as of December 31, 2023	96,885	$	9.42	$	0.7
Vested	(96,885)	$	9.42
Nonvested as of June 30, 2024	—	$	—	$	—

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Equity (Tables)

6 Months Ended

Jun. 30, 2024

Equity [Abstract]

Schedule of Common Stock Issued and Outstanding

The following is a summary of Arcadium's ordinary shares issued and outstanding:

	Issued	Treasury	Outstanding
Balance as of December 31, 2023 (1)	433,059,946	(263,669)	432,796,277
Issued to Allkem shareholders - Allkem Livent Merger	641,337,840	—	641,337,840
PRSU and RSU awards accelerated - Allkem Livent Merger	648,969	—	648,969
Arcadium RSU awards	155,706	—	155,706
Arcadium share option awards	8,497	—	8,497
Net sales of treasury shares - Arcadium NQSP	—	766	766
Balance as of June 30, 2024	1,075,210,958	(262,903)	1,074,948,055

_____________________

1.Balances outstanding as of December 31, 2023, representing predecessor Livent, have been adjusted to reflect the 2.406 Exchange Ratio.

Schedule of Accumulated Other Comprehensive Income (Loss)

Summarized below is the roll forward of accumulated other comprehensive loss, net of tax.

(in Millions)	Foreign currency adjustments		Derivative Instruments		Total
Accumulated other comprehensive loss, net of tax as of December 31, 2023	$	(49.8)	$	—	$	(49.8)
Other comprehensive (losses)/income before reclassifications	(30.5)		0.3		(30.2)
Accumulated other comprehensive loss, net of tax as of June 30, 2024	$	(80.3)	$	0.3	$	(80.0)

(in Millions)	Foreign currency adjustments		Derivative Instruments		Total
Accumulated other comprehensive loss, net of tax as of December 31, 2022	$	(51.0)	$	—	$	(51.0)
Other comprehensive income before reclassifications	0.5		0.6		1.1
Accumulated other comprehensive loss, net of tax as of June 30, 2023	$	(50.5)	$	0.6	$	(49.9)

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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2024

Earnings Per Share [Abstract]

Schedule of Calculation of Basic and Diluted Earnings Per Share

Earnings applicable to ordinary shares and ordinary shares used in the calculation of basic and diluted earnings per share are as follows:

(in Millions, Except Share and Per Share Data)	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023 (1)		2024		2023 (1)
Numerator:
Net income attributable to Arcadium Lithium plc	$	85.7	$	90.2	$	101.3	$	205.0
Denominator:
Weighted average ordinary shares outstanding - basic	1,074.9		432.3		1,064.2		432.2
Dilutive share equivalents from share-based plans	0.9		3.9		1.0		3.8
Dilutive share equivalents from 2025 Notes	67.7		67.7		67.7		67.7
Weighted average ordinary shares outstanding - diluted	1,143.5		503.9		1,132.9		503.7
Basic earnings per ordinary share	$	0.08	$	0.21	$	0.10	$	0.47
Diluted earnings per ordinary share	$	0.07	$	0.18	$	0.09	$	0.41

_____________________

1.For the three and six months ended June 30, 2023, weighted average ordinary shares outstanding - basic and diluted, dilutive share equivalents and basic and diluted earnings per ordinary share amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio.

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Financial Instruments, Risk Management and Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2024

Fair Value Disclosures [Abstract]

Schedule Of Financial Instrument Valuation Methods

Our other financial instruments include the following:

Financial Instrument	Valuation Method
Foreign exchange forward contracts	Estimated amounts that would be received or paid to terminate the contracts at the reporting date based on current market prices for applicable currencies.

Schedule of Fair Value of Derivative Instruments

The following table provides the gross fair value and net balance sheet presentation of our derivative instruments. The Company had no open derivative cash flow hedge contracts as of December 31, 2023.

	June 30, 2024
	Gross Amount of Derivatives
(in Millions)	Designated as Cash Flow Hedges
Derivative assets
Foreign exchange contracts	$	0.4
Total derivative assets (1)	0.4
Net derivative assets	$	0.4

__________________

1.Net balance is included in Prepaid and other current assets in the condensed consolidated balance sheets.

Schedule of Derivatives in Cash Flow Hedging Relationships

The following tables summarize the gains or losses related to our cash flow hedges and derivatives not designated as cash flow hedging instruments.

Derivatives in Cash Flow Hedging Relationships

(in Millions)	Total Foreign Exchange Contracts
Accumulated other comprehensive income, net of tax as of December 31, 2023	$	—
Unrealized hedging gains, net of tax	0.2
Total derivatives instruments impact on comprehensive income, net of tax	0.2
Accumulated other comprehensive income, net of tax as of March 31, 2024	$	0.2
Unrealized hedging gains, net of tax	0.1
Total derivatives instruments impact on comprehensive income, net of tax	0.1
Accumulated other comprehensive income, net of tax at June 30, 2024	$	0.3

(in Millions)	Total Foreign Exchange Contracts
Accumulated other comprehensive income, net of tax as of December 31, 2022	$	—
Unrealized hedging gains, net of tax	0.2
Total derivatives instruments impact on comprehensive income, net of tax	0.2
Accumulated other comprehensive income, net of tax as of March 31, 2023	$	0.2
Unrealized hedging gains, net of tax	0.4
Total derivatives instruments impact on comprehensive income, net of tax	0.4
Accumulated other comprehensive income, net of tax at June 30, 2023	$	0.6

Schedule of Derivatives Not Designated as Cash Flow Hedging Instruments

	Location of Gain or (Loss) Recognized in Income on Derivatives	Amount of Pre-tax Gain or (Loss)  Recognized in Income on Derivatives (1)
		Three Months Ended June 30,				Six Months Ended June 30,
(in Millions)		2024		2023		2024		2023
Foreign Exchange contracts	Other gain/(loss)	$	2.5	$	(0.2)	$	13.1	$	1.9
Total		$	2.5	$	(0.2)	$	13.1	$	1.9

____________________

1.Amounts represent the gain or loss on the derivative instrument offset by the gain or loss on the hedged item.

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

The following tables present our fair-value hierarchy for those assets and liabilities measured at fair-value on a recurring basis in our condensed consolidated balance sheets.

(in Millions)	June 30, 2024		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in deferred compensation plan (1)	$	6.3	$	6.3	$	—	$	—
JEMSE Receivable	5.0		—		—		5.0
Equity securities (2)	1.8		1.8		—		—
Derivatives – Foreign exchange	0.4		—		0.4		—
Total Assets	$	13.5	$	8.1	$	0.4	$	5.0
Liabilities
Deferred compensation plan obligation (3)	$	7.2	$	7.2	$	—	$	—
Total Liabilities	$	7.2	$	7.2	$	—	$	—

(in Millions)	December 31, 2023		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in deferred compensation plan (1)	$	4.1	$	4.1	$	—	—
Total Assets	$	4.1	$	4.1	$	—	$	—
Liabilities
Deferred compensation plan obligation (3)	$	6.7	$	6.7	$	—	$	—
Total Liabilities (4)	$	6.7	$	6.7	$	—	$	—

____________________

1.Balance is included in Investments in the condensed consolidated balance sheets. Arcadium NQSP investments in Arcadium ordinary shares are recorded as Treasury shares in the condensed consolidated balance sheets and carried at historical cost. Mark-to-market gains of $0.3 million and $1.1 million were recorded for the three and six months ended June 30, 2024, respectively. Mark-to-market losses of $0.6 million and $0.8 million were recorded for the three and six months ended June 30, 2023, related to the Arcadium ordinary shares. The mark-to-market gains and losses were recorded in Selling, general and administrative expenses in the condensed consolidated statements of operations, with a corresponding offset to the deferred compensation plan obligation in the condensed consolidated balance sheets.

2.Mark-to-market gains and losses are recorded to Other gain/loss in the condensed consolidated statement of operations.

3.Balance is included in Other long-term liabilities in the condensed consolidated balance sheets.

4.The Company had no open cash flow hedge contracts as of December 31, 2023.

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Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Lease Cost

Quantitative disclosures about our leases are summarized in the table below.

	Three Months Ended June 30,				Six Months Ended June 30,
(in Millions, except for weighted-average amounts)	2024		2023		2024		2023
Lease Cost
Operating lease cost	$	4.2	$	0.3	$	8.5	$	0.6
Short-term lease cost	0.1		0.1		0.2		0.2
Total lease cost (1)	$	4.3	$	0.4	$	8.7	$	0.8
Other information
Cash paid for amounts included in the measurement of lease liabilities:
Cash paid for operating leases	$	3.8	$	0.4	$	8.2	$	0.7

__________________________

1.Lease expense is classified as Selling, general and administrative expenses in our condensed consolidated statements of operations.

Schedule of Maturity Analysis of Operating Lease Liabilities

The table below presents a maturity analysis of our operating lease liabilities for each of the next five years and a total of the amounts for the remaining years.

(in Millions)	Undiscounted cash flows
Remainder of 2024	$	7.3
2025	9.9
2026	9.1
2027	8.3
2028	8.1
Thereafter	31.1
Total future minimum lease payments	73.8
Less: Imputed interest	(19.8)
Total	$	54.0

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Supplemental Information (Tables)

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Prepaid and Other Assets

The following tables present details of prepaid and other current assets, other assets, accrued and other current liabilities, and other long-term liabilities as presented on the condensed consolidated balance sheets:

(in Millions)	June 30, 2024		December 31, 2023
Prepaid and other current assets
Tax related items	$	113.6	$	29.5
Prepaid expenses	66.3		16.9
Argentina government receivable (1)	15.1		7.9
Other receivables	63.6		28.2
Bank Acceptance Drafts (2)	1.2		—
Derivative assets (Note 17)	0.4		—
Other current assets	3.8		3.9
Total	$	264.0	$	86.4

(in Millions)	June 30, 2024		December 31, 2023
Other assets
Argentina government receivable (1), (3)	$	128.8	$	71.3
Advance to contract manufacturers (4)	26.1		27.6
Long-term semi-finished goods inventory	137.4		1.0
Tax related items	4.0		4.0
Capitalized software, net	1.5		1.1
Other assets	44.5		22.7
Total	$	342.3	$	127.7

_________________

1.We have various subsidiaries that conduct business in Argentina. As of June 30, 2024 and December 31, 2023, $39.3 million and $38.8 million, respectively, of outstanding receivables due from the Argentina government, which primarily represent export tax and export rebate receivables, was denominated in U.S. dollars. A recent judicial decision relating to the U.S. dollar-denominated export tax receivable portion ($34.8 million) permits the Argentina government to reimburse us in Argentine pesos at the historical foreign exchange rate applicable at each past payment date, adjusted by a bank deposit interest rate. While Arcadium filed an appeal on November 6, 2023 and believes it has valid defenses on the technical merits, the ultimate resolution of this matter could result in a possible loss of up to $34.3 million. We continually review the recoverability of all outstanding receivables by analyzing historical experience, current collection trends and regional business and political factors among other factors.

2.Bank Acceptance Drafts are a common Chinese finance note used to settle trade transactions. The Company accepts these notes from Chinese customers based on criteria intended to ensure collectability and limit working capital usage.

3.In June 2023, the Company decided to pay $21.7 million for the export duties and interest claimed by the Customs Authorities of Buenos Aires, Ezeiza and Salta related to exports made between the years 2018 – 2022 registered in those locations. This payment stops the accrual of any further interest. It was a deposit made under protest and was not an admission of any of the claims made by the Customs Authorities or a waiver of any of the Company's defenses, including recovery of the deposit plus interest. The cases remain in discussion. See Note 20 for more information.

4.We record deferred charges for certain contract manufacturing agreements which we amortize over the term of the underlying contract.

Schedule of Accrued and Other Liabilities

(in Millions)	June 30, 2024		December 31, 2023
Accrued and other current liabilities
Accrued payroll	$	56.3	$	31.2
Retirement liability - 401k	4.6		3.2
Environmental reserves, current	3.0		0.5
Severance	1.6		1.7
Accrued investment in unconsolidated affiliates	—		27.0
Other accrued and other current liabilities (1)	94.3		73.2
Total	$	159.8	$	136.8

(in Millions)	June 30, 2024		December 31, 2023
Other long-term liabilities
Deferred compensation plan obligation	$	7.2	$	6.7
Contingencies related to uncertain tax positions (2)	16.2		6.2
Self-insurance reserves	1.1		1.1
Asset retirement obligations	11.3		3.7
Other long-term liabilities	53.6		3.6
Total	$	89.4	$	21.3

____________________

1.Amounts primarily include accrued capital expenditures related to our expansion projects.

2.As of June 30, 2024, we have recorded a liability for uncertain tax positions of $15.8 million and a $0.4 million indemnification liability where the offsetting uncertain tax position is with FMC, per the tax matters agreement.

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Significant Accounting Policies and Related Financial Information - Schedule of Impact of Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023		Jun. 30, 2024	Jun. 30, 2023
Significant Accounting Policies [Line Items]
Cost of sales	$ 174.1	$ 154.8	$ 88.5	[1]	$ 328.9	$ 174.8	[1]
Restructuring and other charges	21.9	79.8	24.3	[1]	101.7	26.3	[1]
Other (gains)/losses	$ (79.9)	(77.3)	(7.6)	[1]	$ (157.2)	(6.5)	[1]
Prior Presentation
Significant Accounting Policies [Line Items]
Cost of sales		116.8	92.4			179.9
Restructuring and other charges		83.6	24.2			26.1
Other (gains)/losses		(43.1)	(11.4)			(11.4)
Loss/(gain) Reclassified
Significant Accounting Policies [Line Items]
Cost of sales		(38.0)	3.9			5.1
Restructuring and other charges		3.8	(0.1)			(0.2)
Other (gains)/losses		$ (34.2)	$ 3.8			$ 4.9

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

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Significant Accounting Policies and Related Financial Information - Narrative (Details) $ in Millions		3 Months Ended		6 Months Ended
	Aug. 02, 2024 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) segment	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Significant Accounting Policies [Line Items]
Number of reportable segments | segment				1
Asset retirement obligation		$ 11.3		$ 11.3		$ 3.7
Realized foreign currency transaction gain		$ 20.9	$ 11.4	$ 50.5	$ 11.4
Subsequent Event | Li-Metal Corp
Significant Accounting Policies [Line Items]
Asset acquisition, consideration transferred	$ 11.0
Minimum
Significant Accounting Policies [Line Items]
Payment term (in days)				20 days
Maximum
Significant Accounting Policies [Line Items]
Payment term (in days)				180 days

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Allkem Livent Merger - Narrative (Details) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	Jan. 04, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2023 USD ($) $ / shares	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2023 USD ($) $ / shares	Dec. 31, 2023 $ / shares	Dec. 31, 2022 $ / shares
Business Acquisition [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00
Costs related to the Allkem Livent Merger | $		$ 19.8	$ 18.8	$ 86.8	$ 18.8
Livent Corporation
Business Acquisition [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.001
Allkem Livent Merger
Business Acquisition [Line Items]
Conversion ratio	2.406
Trade receivables | $	$ 64.2
Property, plant and equipment | $	4,326.1
Allkem Livent Merger | Mineral rights
Business Acquisition [Line Items]
Property, plant and equipment | $	2,745.0
Allkem Livent Merger | Non Mining Properties and Mineral Rights
Business Acquisition [Line Items]
Property, plant and equipment | $	$ 1,581.1
Allkem Livent Merger | Former Livent Stockholders
Business Acquisition [Line Items]
Number of shares issued in transaction (in shares) | shares	433,156,855
Allkem Livent Merger | Former Allkem Shareholders
Business Acquisition [Line Items]
Number of shares issued in transaction (in shares) | shares	641,337,840
Allkem Livent Merger | CHESS Depositary Instrument
Business Acquisition [Line Items]
Equity interest issued or issuable, share exchange ratio	1
Allkem Livent Merger | CHESS Depositary Instrument | Former Allkem Shareholders
Business Acquisition [Line Items]
Number of shares issued in transaction (in shares) | shares	542,612,224
Allkem Livent Merger | Ordinary Shares, $1.00 Per Share Par Value
Business Acquisition [Line Items]
Equity interest issued or issuable, share exchange ratio	1
Allkem Livent Merger | Ordinary Shares, $1.00 Per Share Par Value | Former Allkem Shareholders
Business Acquisition [Line Items]
Number of shares issued in transaction (in shares) | shares	98,725,616
Allkem Livent Merger | Performance Shares | Former Livent Stockholders
Business Acquisition [Line Items]
Number of shares issued in transaction (in shares) | shares	96,909

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Allkem Livent Merger - Consideration Transferred (Details) - Allkem Livent Merger $ in Millions	Jan. 04, 2024 USD ($)
Business Acquisition [Line Items]
Fair value of Arcadium ordinary shares issued to Allkem shareholders	$ 4,385.6
Fair value of converted Allkem performance rights attributable to pre-combination service	4.8
Total consideration	$ 4,390.4

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Allkem Livent Merger - Purchase Price Allocation (Details) - USD ($) $ in Millions	Jan. 04, 2024	Jun. 30, 2024	Dec. 31, 2023
Liabilities assumed:
Goodwill		$ 1,300.3	$ 120.7	[1]
Allkem Livent Merger
Business Acquisition [Line Items]
Total consideration	$ 4,390.4
Assets acquired:
Cash and cash equivalents	681.4
Trade receivables	64.2
Inventories	121.3
Prepaid and other current assets	87.2
Property, plant and equipment	4,326.1
Right of use assets - operating leases, net	53.4
Deferred income tax assets	26.3
Other assets	192.9
Total assets acquired	5,552.8
Liabilities assumed:
Accounts payable, trade and other	223.7
Accrued and other current liabilities	35.1
Income taxes	78.5
Long-term debt including current portion	301.7
Operating lease liabilities - long-term	53.4
Environmental liabilities	9.8
Deferred income tax liabilities	1,315.3
Other long-term liabilities	49.5
Total liabilities assumed	2,067.0
Fair value of net assets acquired	3,485.8
Add: Fair value of noncontrolling interests acquired	275.0
Fair value of net assets acquired less noncontrolling interests acquired	3,210.8
Allkem
Liabilities assumed:
Goodwill	$ 1,179.6	$ 1,179.6	$ 0.0

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Allkem Livent Merger - Earnings Subsequent to the Closing Date of Transaction (Details) - Allkem Livent Merger - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024
Business Acquisition [Line Items]
Revenue	$ 83.8	$ 186.3
Income from operations before income taxes	$ 75.8	$ 152.2

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Allkem Livent Merger - Pro Forma Information (Details) - Allkem Livent Merger - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenue	$ 569.8	$ 1,139.2
Net income	$ 278.4	$ 513.4

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Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 120.7	[1]
Acquisitions - Allkem Livent Merger	1,189.2
Measurement period adjustments	(9.6)
Ending balance	1,300.3
Allkem
Goodwill [Roll Forward]
Beginning balance	0.0
Acquisitions - Allkem Livent Merger	1,189.2
Measurement period adjustments	(9.6)
Ending balance	1,179.6
Nemaska Lithium
Goodwill [Roll Forward]
Beginning balance	120.7
Acquisitions - Allkem Livent Merger	0.0
Measurement period adjustments	0.0
Ending balance	$ 120.7

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Revenue Recognition - Disaggregation of Revenue by Major Geographical Region (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023		Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Consolidated Revenue	$ 254.5	$ 235.8	[1]	$ 515.7	$ 489.3	[1]
Asia Pacific
Disaggregation of Revenue [Line Items]
Consolidated Revenue	211.8	171.6		431.9	338.6
North America
Disaggregation of Revenue [Line Items]
Consolidated Revenue	22.8	40.7		43.5	92.6
Europe, Middle East & Africa
Disaggregation of Revenue [Line Items]
Consolidated Revenue	19.5	23.5		39.1	56.3
Latin America
Disaggregation of Revenue [Line Items]
Consolidated Revenue	0.4	0.0		1.2	1.8
China
Disaggregation of Revenue [Line Items]
Consolidated Revenue	155.1	90.8		281.0	179.2
Japan
Disaggregation of Revenue [Line Items]
Consolidated Revenue	$ 31.8	42.7		77.8	76.1
United States
Disaggregation of Revenue [Line Items]
Consolidated Revenue		39.9			90.1
South Korea
Disaggregation of Revenue [Line Items]
Consolidated Revenue		$ 31.2		$ 64.9	$ 66.3

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

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Revenue Recognition - Narrative (Details) - Revenue from Contract with Customer Benchmark - Customer Concentration Risk	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Customer One
Disaggregation of Revenue [Line Items]
Concentration risk percentage	24.00%	24.00%	23.00%	24.00%
Customer Two
Disaggregation of Revenue [Line Items]
Concentration risk percentage	21.00%	23.00%	18.00%	21.00%
Customer Three
Disaggregation of Revenue [Line Items]
Concentration risk percentage			10.00%
Ten Largest Customers
Disaggregation of Revenue [Line Items]
Concentration risk percentage	72.00%	72.00%	73.00%	68.00%

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Revenue Recognition - Disaggregation of Revenue By Major Product Category (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023		Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Consolidated Revenue	$ 254.5	$ 235.8	[1]	$ 515.7	$ 489.3	[1]
Lithium Hydroxide
Disaggregation of Revenue [Line Items]
Consolidated Revenue	113.1	153.6		223.7	306.3
Lithium Carbonate
Disaggregation of Revenue [Line Items]
Consolidated Revenue	72.7	5.1		152.5	14.5
Butyllithium and Other Lithium Specialties
Disaggregation of Revenue [Line Items]
Consolidated Revenue	44.9	77.1		90.9	168.5
Spodumene Concentrate
Disaggregation of Revenue [Line Items]
Consolidated Revenue	$ 23.8	$ 0.0		$ 48.6	$ 0.0

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

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Revenue Recognition - Assets and Liabilities (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	[2]	Dec. 31, 2023	[1]
Revenue from Contract with Customer [Abstract]
Receivables from contracts with customers, net of allowances	$ 94.1			$ 106.7
Contract liability - short-term	37.1			4.4
Contract liability - long-term	253.8			$ 217.8
(Decrease)/increase receivables from contracts with customers, net of allowances	(12.6)
(Decrease)/increase contract liability - short-term	32.7	$ (13.2)
(Decrease)/increase contract liability - long-term	$ 36.0

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

[2] Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

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Revenue Recognition - Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 $ in Billions	Jun. 30, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1.7
Expected timing of satisfaction of performance obligations	5 years

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Inventories, Net - Schedule of Inventory (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Finished goods	$ 130.3	$ 59.1
Semi-finished goods	101.4	108.8
Raw materials, supplies, and other	101.4	49.6
Inventory, net	$ 333.1	$ 217.5	[1]

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Investments- Equity Method Investments (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Investments	$ 38.2	$ 34.8	[1]
ESM ILiAD, LLC
Schedule of Equity Method Investments [Line Items]
Investments	30.1	30.1
Arcadium NQSP
Schedule of Equity Method Investments [Line Items]
Investments	6.3	4.7
Other
Schedule of Equity Method Investments [Line Items]
Investments	$ 1.8	$ 0.0

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Investments- Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Investment carrying amount	$ 38.2	$ 34.8	[1]
Toyotsu Lithium Corporation
Schedule of Equity Method Investments [Line Items]
Ownership interest by parent percentage	75.00%
Subsidiary, economic interest percentage, noncontrolling interest	51.00%
Toyotsu Lithium Corporation | Class A Voting Shares
Schedule of Equity Method Investments [Line Items]
Ownership interest by parent percentage	49.00%
Toyotsu Lithium Corporation | Class B Nonvoting Shares
Schedule of Equity Method Investments [Line Items]
Ownership interest by parent percentage	100.00%
Toyota Tsusho Corporation
Schedule of Equity Method Investments [Line Items]
Ownership interest by parent percentage	49.00%
Subsidiary, economic interest percentage, noncontrolling interest	25.00%
Toyota Tsusho Corporation | Class A Voting Shares
Schedule of Equity Method Investments [Line Items]
Ownership interest by parent percentage	51.00%
ESM ILiAD, LLC
Schedule of Equity Method Investments [Line Items]
Investment carrying amount	$ 30.1	$ 30.1

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Partially-Owned Subsidiaries and Noncontrolling Interests (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
	Mar. 28, 2024	Jun. 30, 2024	Jun. 30, 2023		Jun. 30, 2024	Jun. 30, 2023		Mar. 31, 2024	Mar. 27, 2024	Dec. 31, 2023		Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Equity in net loss of unconsolidated affiliate		$ 0.0	$ 7.2	[1]	$ 0.0	$ 15.3	[1],[2]
Cash and cash equivalents		380.4			380.4					$ 237.6	[3]
Long-term debt		634.0			634.0					$ 302.0
Cash held in subsidiary entities		$ 65.0			$ 65.0
Investment interest-free loan repaid dividends percentage		33.00%			33.00%
Line of Credit
Schedule of Equity Method Investments [Line Items]
Restricted cash, noncurrent		$ 24.6			$ 24.6
Sales De Jujuy Pte Ltd
Schedule of Equity Method Investments [Line Items]
Ownership interest by parent percentage		72.68%			72.68%
Sales De Jujuy Pte Ltd | Toyota Tsusho Corporation
Schedule of Equity Method Investments [Line Items]
Subsidiary, ownership percentage, noncontrolling owner		27.32%			27.32%
Sales De Jujuy S.A
Schedule of Equity Method Investments [Line Items]
Ownership interest by parent percentage		66.50%			66.50%
Sales De Jujuy S.A | Jujuy Energia y Minera Sociedad del Estado
Schedule of Equity Method Investments [Line Items]
Subsidiary, ownership percentage, noncontrolling owner		8.50%			8.50%
Sales De Jujuy S.A | Sales De Jujuy Pte Ltd
Schedule of Equity Method Investments [Line Items]
Ownership interest by parent percentage		91.50%			91.50%
Olaroz
Schedule of Equity Method Investments [Line Items]
Ownership interest by parent percentage		66.50%			66.50%
Olaroz | Toyota Tsusho Corporation
Schedule of Equity Method Investments [Line Items]
Subsidiary, ownership percentage, noncontrolling owner		25.00%			25.00%
Olaroz | Jujuy Energia y Minera Sociedad del Estado
Schedule of Equity Method Investments [Line Items]
Subsidiary, ownership percentage, noncontrolling owner		8.50%			8.50%
Nemaska Lithium Inc.
Schedule of Equity Method Investments [Line Items]
Equity interest percentage												50.00%
Equity method investments												$ 437.1
Equity in net loss of unconsolidated affiliate			$ 7.2			$ 15.3
Cash and cash equivalents								$ 149.7
Proceeds from investment cash in second advance payment	$ 150.0
Long-term debt									$ 97.8
Contract liabilities from customers									$ 52.2
Cumulative proceeds from supply agreement					$ 225.0
Nemaska Lithium Inc. | Scenario, Plan
Schedule of Equity Method Investments [Line Items]
Advances to contract manufacturers		$ 350.0			350.0
Sales De Jujuy Pte Ltd
Schedule of Equity Method Investments [Line Items]
Accounts receivable, fair value		$ 5.0			$ 5.0

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

[2] Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

[3] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total cost	$ 7,342.7		$ 2,506.2
Accumulated depreciation	(307.8)		(269.1)
Property, plant and equipment, net	7,034.9		2,237.1	[1]
Depreciation	44.7	$ 12.3
Land and land improvements
Property, Plant and Equipment [Line Items]
Total cost	319.8		106.2
Buildings
Property, Plant and Equipment [Line Items]
Total cost	$ 896.7		134.9
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	20 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total cost	$ 735.0		420.7
Mineral rights
Property, Plant and Equipment [Line Items]
Total cost	3,280.0		560.0
Construction in progress
Property, Plant and Equipment [Line Items]
Total cost	$ 2,111.2		$ 1,284.4
Land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	20 years
Leased plant and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	1 year
Leased plant and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years 6 months
Other machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Other machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	18 years
Software | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Software | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Restructuring and Other Charges - Restructuring Charges in Consolidated Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring charges:
Restructuring charges	$ 3.2	$ 0.7	$ 14.1	$ 2.4
Other charges:
Costs related to the Allkem Livent Merger	19.8	18.8	86.8	18.8
Bessemer City plant fire loss	0.0	5.0	0.0	5.0
Other	(1.1)	(0.2)	0.8	0.1
Total Restructuring and other charges	$ 21.9	$ 24.3	$ 101.7	$ 26.3

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Other gains (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023		Jun. 30, 2024	Jun. 30, 2023
Other Income and Expenses [Abstract]
Non-recurring - SDV SA and MdA Holdings LLC	$ 16.8		$ 11.4		$ 36.5	$ 11.4
Recurring - SDJ and MdA	4.1		0.0		14.0	0.0
Total costs and expenses	20.9		11.4		50.5	11.4
Foreign currency remeasurement gains/(losses):
Remeasurement gains on U.S. dollar denominated cash held by foreign currency functional subsidiary	0.4		0.0		14.3	0.0
All other foreign currency remeasurement gains/(losses)	58.6		(3.8)		92.8	(4.9)
Total Foreign currency remeasurement gains/(losses)	59.0		(3.8)		107.1	(4.9)
Loss on trading securities	0.0		0.0		(0.4)	0.0
Total Other gains	$ 79.9	$ 77.3	$ 7.6	[1]	$ 157.2	$ 6.5	[1]

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023		Jun. 30, 2024	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income tax expense	$ 35.3	$ 14.6	[1]	$ 89.1	$ 38.5	[1]
Effective tax rate	27.20%	13.90%		43.80%	15.80%

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

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Asset Retirement Obligations (Details) - Allkem Livent Merger $ in Millions	Jun. 30, 2024 USD ($)
Mt Cattlin Spodumene Mine
Business Acquisition [Line Items]
Asset retirement obligations acquired	$ 7.3
Olaroz
Business Acquisition [Line Items]
Asset retirement obligations acquired	1.5
Galaxy Lithium (SAL DE VIDA) S.A
Business Acquisition [Line Items]
Asset retirement obligations acquired	$ 1.0

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Debt - Long-term Debt (Details) - USD ($) $ in Millions	May 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Transaction costs/discount		$ (1.6)	$ (2.4)
Subtotal long-term debt (including current maturities)		634.0	302.0
Less current maturities		(43.4)	(2.4)	[1]
Long-term debt		590.6	299.6	[1]
Total debt assumed in Allkem Livent Merger
Debt Instrument [Line Items]
Subtotal long-term debt (including current maturities)		$ 237.1	0.0
Nemaska Lithium | Prepayment Agreement Tranche One
Debt Instrument [Line Items]
Convertible debt, interest rate		8.90%
Transaction costs/discount		$ (19.4)	(19.8)
Nemaska - Prepayment agreement/Other		$ 75.0	75.0
Nemaska Lithium | Prepayment Agreement Tranche Two
Debt Instrument [Line Items]
Convertible debt, interest rate		9.40%
Transaction costs/discount		$ (53.4)	0.0
Nemaska - Prepayment agreement/Other		150.0	0.0
Nemaska Lithium | Other
Debt Instrument [Line Items]
Nemaska - Prepayment agreement/Other		$ 0.5	3.4
Line of Credit | Project Loan Facility - Stage 1 of Olaroz Plant
Debt Instrument [Line Items]
Convertible debt, interest rate		4.896%
Long-term debt, gross		$ 9.1	0.0
Line of Credit | Project Loan Facility - Stage 2 of Olaroz Plant
Debt Instrument [Line Items]
Convertible debt, interest rate		2.6119%
Long-term debt, gross		$ 144.0	0.0
Line of Credit | Affiliate Loans with TTC
Debt Instrument [Line Items]
Convertible debt, interest rate		15.25%
Long-term debt, gross		$ 81.5	0.0
Line of Credit | Affiliate Loan with TLP
Debt Instrument [Line Items]
Convertible debt, interest rate		10.34%
Long-term debt, gross		$ 2.5	0.0
Line of Credit | Project Financing Facility - Sal de Vida
Debt Instrument [Line Items]
Long-term debt, gross	$ 47.0
Prepayment fee	0.9
Deferred financing costs	$ 1.3
Convertible Debt
Debt Instrument [Line Items]
Convertible debt, interest rate		4.125%
Long-term debt, gross		$ 245.8	245.8
Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding, amount		20.6	15.5
Line of credit, remaining borrowing capacity		479.4	484.5
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross		$ 0.0	$ 0.0
SOFR borrowings | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Credit facility, interest rate		7.19%
Base rate borrowings | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Credit facility, interest rate		9.25%

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Debt - Narrative (Details) $ / shares in Units, $ in Millions			3 Months Ended			6 Months Ended			12 Months Ended
	May 30, 2024 USD ($)	Jan. 04, 2024 USD ($) $ / shares	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2023 USD ($)	[1]	Jun. 30, 2024 USD ($) loan day $ / shares	Jun. 30, 2023 USD ($)	[1],[2]	Dec. 31, 2020 USD ($) day $ / shares	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Loss on debt extinguishment			$ 0.9	$ 0.0		$ 1.1	$ 0.0
Cash and cash equivalents			$ 380.4			$ 380.4				$ 237.6	[3]
Convertible Debt
Debt Instrument [Line Items]
Debt interest rate			4.125%			4.125%
Long-term debt, gross			$ 245.8			$ 245.8				245.8
Convertible Debt | Conversion Circumstance One
Debt Instrument [Line Items]
Conversion price per share (in dollars per share) | $ / shares			$ 4.72			$ 4.72
Percentage of conversion price						130.00%
Trading days | day						20
Consecutive trading days | day						30
Line of Credit
Debt Instrument [Line Items]
Restricted cash, noncurrent			$ 24.6			$ 24.6
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross			0.0			0.0				0.0
2025 Notes
Debt Instrument [Line Items]
Debt discount, excluding amortization			$ 2.5			$ 5.0
2025 Notes | Convertible Debt
Debt Instrument [Line Items]
Debt interest rate			4.125%			4.125%			4.125%
Aggregate principal amount of debt									$ 245.8
Conversion price per share (in dollars per share) | $ / shares		$ 3.63							$ 8.73
Percentage of conversion price									130.00%
Trading days | day									20
Consecutive trading days | day									30
Redemption price, percentage of principal amount									100.00%
Business day period | day									5
Consecutive trading day period | day									5
Trading price as percentage of closing price of common stock									98.00%
Amortization of discount and transaction costs			$ 0.4			$ 0.8
Conversion ratio (in shares)						0.275459331			0.1144885
Convertible Senior Notes, Over-Allotment Option | Convertible Debt
Debt Instrument [Line Items]
Capital contribution from noncontrolling interest - Nemaska Lithium									$ 238.2
Payments of debt issuance costs									$ 7.6
Credit Agreement | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 500.0
Maximum increase in revolving credit commitments		$ 700.0
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		SOFR borrowings
Basis spread on variable rate		0.10%
Floor rate		0.00%
Commitment fee percentage		0.25%
Deferred financing costs						$ 0.8
Loss on debt extinguishment			0.0			0.2
Deferred financing costs			$ 2.5			$ 2.5
Net leverage ratio						3.5
Minimum interest coverage ratio						3.5
Credit Agreement | Line of Credit | Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 50.0
Project Financing Facility - Sal de Vida | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 180.0
Deferred financing costs	1.3
Debt instruments, ownership percentage			1			1
Long-term debt, gross	47.0
Prepayment fee	$ 0.9
Project Loan Facility - Stage 1 of Olaroz Plant | Line of Credit
Debt Instrument [Line Items]
Debt interest rate			4.896%			4.896%
Aggregate principal amount of debt			$ 9.1			$ 9.1
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]						SOFR borrowings
Basis spread on variable rate						0.80%
Long-term debt, gross			$ 9.1			$ 9.1				0.0
Percentage of debt hedged by interest rate			88.60%			88.60%
Project Loan Facility for Stage 1 | Line of Credit
Debt Instrument [Line Items]
Debt instrument, percent securitized			82.35%			82.35%
Project Loan Facility - Stage 2 of Olaroz Plant | Line of Credit
Debt Instrument [Line Items]
Debt interest rate			2.6119%			2.6119%
Long-term debt, gross			$ 144.0			$ 144.0				0.0
Cash and cash equivalents			$ 108.0			$ 108.0
Fee for permitted reductions			0.025			0.025
Affiliate Loans with TTC | Line of Credit
Debt Instrument [Line Items]
Debt interest rate			15.25%			15.25%
Aggregate principal amount of debt			$ 93.0			$ 93.0
Long-term debt, gross			$ 81.5			$ 81.5				$ 0.0
Number of loans | loan						11

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

[2] Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

[3] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Share-based Compensation - Narrative (Details) $ / shares in Units, $ in Millions			6 Months Ended
	Jan. 04, 2024 shares	Dec. 22, 2023	Jun. 30, 2024 USD ($) publicly_traded_peer $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of publicly traded peers | publicly_traded_peer			10
Weighted average grant date fair value (in dollars per share) | $ / shares			$ 1.92
Legacy Livent Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)			6,579,305
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, expiration period (in years)			10 years
Unrecognized compensation cost related to unvested stock options | $			$ 7.8
Requisite service period (in years)			2 years 7 months 6 days
RSU awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost | $			$ 17.9
Requisite service period (in years)			2 years 4 months 24 days
Accelerated vesting, number (in shares)			927,510
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated vesting, number (in shares)	96,885
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		100.00%
Arcadium Lithium Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)			64,548,000
Share-based payment award, expiration period (in years)			10 years

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Share-based Compensation - Stock Compensation (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense, tax	$ 500,000	$ 1,300,000
Stock compensation expense	3,500,000	18,400,000
Selling, General and Administrative Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Gross stock compensation charges	3,500,000	5,700,000
Restructuring Charges
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Gross stock compensation charges	500,000	14,000,000
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense, tax	100,000	200,000
Stock compensation expense	800,000	1,200,000
RSU awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense, tax	400,000	1,100,000
Stock compensation expense	2,700,000	16,800,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense, tax	0	100,000
Stock compensation expense	$ 0	$ 400,000

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Share-based Compensation - Black Scholes Assumptions (Details) - Stock Option	Jun. 28, 2024	May 14, 2024	Mar. 06, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%
Expected volatility	33.00%	31.97%	31.18%
Expected life (in years)	6 years	6 years	6 years
Risk-free interest rate	4.28%	4.41%	4.08%

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Share-based Compensation - Stock Option Activity (Details) $ / shares in Units, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
Number of Options Granted But Not Exercised
Beginning balance (in shares) | shares	5,060,687
Granted (in shares) | shares	3,877,317
Exercised (in shares) | shares	(53,056)
Forfeited (in shares) | shares	(2,610)
Ending balance (in shares) | shares	8,882,338	5,060,687
Exercisable (in shares) | shares	4,136,405,000
Weighted-Average Remaining Contractual Life (in Years)
Outstanding	7 years 1 month 6 days	5 years 7 months 6 days
Exercisable	4 years 6 months
Weighted-Average Exercise Price Per Share
Outstanding (in dollars per share) | $ / shares	$ 6.73
Granted (in dollars per share) | $ / shares	4.92
Exercised (in dollars per share) | $ / shares	4.05
Forfeited (in dollars per share) | $ / shares	9.70
Outstanding (in dollars per share) | $ / shares	5.96	$ 6.73
Exercisable (in dollars per share) | $ / shares	$ 6.25
Aggregate Intrinsic Value (in Millions)
Outstanding | $	$ 0.1	$ 6.5
Exercised | $	0.0
Exercisable | $	$ 0.1

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Share-based Compensation - RSU and PRSU Activity (Details) - USD ($) $ / shares in Units, $ in Millions			6 Months Ended
	Jan. 12, 2024	Jan. 03, 2024	Jun. 30, 2024	Dec. 31, 2023
RSU awards
Number of awards
Nonvested, beginning balance (in shares)			2,287,088
Granted (in shares)	1,080,825		3,868,888
Vested (in shares)		(768,440)	(1,869,675)
Nonvested, ending balance (in shares)			4,286,301
Weighted-Average Grant Date Fair Value
Nonvested, beginning balance (in dollars per share)			$ 7.83
Granted (in dollars per share)			5.44
Vested (in dollars per share)			7.19
Nonvested, ending balance (in dollars per share)			$ 5.95
Aggregate Intrinsic Value (in Millions)
Aggregate intrinsic value			$ 14.4	$ 17.1
Intrinsic value of awards vested		$ 5.3
Performance Shares
Number of awards
Nonvested, beginning balance (in shares)			96,885
Vested (in shares)			(96,885)
Nonvested, ending balance (in shares)			0
Weighted-Average Grant Date Fair Value
Nonvested, beginning balance (in dollars per share)			$ 9.42
Vested (in dollars per share)			9.42
Nonvested, ending balance (in dollars per share)			$ 0
Aggregate Intrinsic Value (in Millions)
Aggregate intrinsic value			$ 0.0	$ 0.7

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Equity - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Jan. 04, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity [Abstract]
Common stock, shares authorized (in shares)	5,000,000,000		5,000,000,000		5,000,000,000	5,000,000,000
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	125,000,000		125,000,000		125,000,000
Preferred stock, par value (in dollars per share)	$ 1.00		$ 1.00		$ 1.00
Dividends paid	$ 0	$ 0	$ 0	$ 0

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Equity - Summary of Common Stock Activity (Details)	6 Months Ended
	Jun. 30, 2024 shares	Jan. 04, 2024	Dec. 31, 2023	Jun. 30, 2023
Issued
Beginning balance (in share)	433,059,946
Arcadium share option awards (in shares)	3,877,317
Ending balance (in share)	1,075,210,958
Treasury
Beginning balance (in shares)	(263,669)
Ending balance (in shares)	(262,903)
Outstanding
Beginning balance, outstanding (in shares)	432,796,277
Ending balance, outstanding (in shares)	1,074,948,055
Exchange ratio				2.406
Allkem Livent Merger
Outstanding
Exchange ratio		2.406
Ordinary Shares, $1.00 Per Share Par Value | Allkem Livent Merger
Outstanding
Exchange ratio			2.406
Performance Share and Restricted Stock Units (RSUs), Accelerated Awards
Issued
PRSU and RSU awards accelerated - Allkem Livent Merger (in shares)	648,969
Arcadium RSU awards
Issued
PRSU and RSU awards accelerated - Allkem Livent Merger (in shares)	155,706
Ordinary Shares, $1.00 Per Share Par Value
Issued
Issued to Allkem shareholders - Allkem Livent Merger (in shares)	641,337,840
Livent Plan | Performance Share and Restricted Stock Units (RSUs
Outstanding
Share issued during period (in shares)	648,969
Livent Plan | Ordinary Shares, $1.00 Per Share Par Value
Outstanding
Share issued during period (in shares)	641,337,840
Arcadium
Treasury
Net sales of treasury (in shares)	766
Outstanding
Net sales of treasury shares - Arcadium NQSP (in shares)	766
Arcadium | Arcadium RSU awards
Outstanding
Share issued during period (in shares)	155,706
Arcadium | Arcadium share option awards
Issued
Arcadium share option awards (in shares)	8,497
Outstanding
Share issued during period (in shares)	8,497

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Equity - Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]		$ 1,784.2			$ 1,784.2
Ending balance		$ 6,262.8				6,262.8
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(49.8)		$ (51.0)	(49.8)	$ (51.0)
Other comprehensive income (losses) before reclassifications						(30.2)	1.1
Ending balance		(80.0)		$ (49.9)		(80.0)	(49.9)
Foreign currency adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(49.8)		(51.0)	(49.8)	(51.0)
Other comprehensive income (losses) before reclassifications						(30.5)	0.5
Ending balance		(80.3)		(50.5)		(80.3)	(50.5)
Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		0.2	0.0	0.2	0.0	0.0	0.0
Other comprehensive income (losses) before reclassifications		0.1	0.2	0.4	0.2	0.3	0.6
Ending balance		$ 0.3	$ 0.2	$ 0.6	$ 0.2	$ 0.3	$ 0.6

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Earnings Per Share - EPS Calculation (Details) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($) $ / shares shares		Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($) $ / shares shares
Numerator:
Net income attributable to Arcadium Lithium plc | $	$ 85.7	$ 90.2	[1]	$ 101.3	$ 205.0	[1]
Denominator:
Weighted average ordinary shares outstanding - basic (in shares)	1,074.9	432.3	[1]	1,064.2	432.2	[1]
Dilutive share equivalents from share-based plans (in shares)	0.9	3.9		1.0	3.8
Dilutive share equivalents from 2025 Notes (in shares)	67.7	67.7		67.7	67.7
Weighted average ordinary shares outstanding - diluted (in shares)	1,143.5	503.9	[1]	1,132.9	503.7	[1]
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share [Abstract]
Basic earnings per ordinary share (in dollars per share) | $ / shares	$ 0.08	$ 0.21	[1]	$ 0.10	$ 0.47	[1]
Earnings Per Share, Diluted [Abstract]
Diluted earnings per ordinary share (in dollars per share) | $ / shares	$ 0.07	$ 0.18	[1]	$ 0.09	$ 0.41	[1]
Exchange ratio		2.406			2.406

[1] For the three and six months ended June 30, 2023, basic and diluted earnings per ordinary share and weighted average ordinary shares outstanding - basic and diluted amounts represent predecessor Livent and have been adjusted to reflect the 2.406 Exchange Ratio. Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023 which do not include the operations of Allkem.

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Earnings Per Share - Narrative (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities, exercise price (in dollars per share)			$ 4.92
Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share
Total antidilutive weighted average share equivalents (in shares)	7,529,226	2,611	7,529,226	2,611
Antidilutive securities, exercise price (in dollars per share)	$ 6.36	$ 9.70	$ 6.36	$ 9.70

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Financial Instruments, Risk Management and Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Estimate of Fair Value Measurement
Derivative [Line Items]
Long-term debt value	$ 747.6
Long-term debt	634.0	$ 302.0
Open foreign currency forward contracts designated as cash flow hedges, U.S. dollar equivalent	22.4
Forward Contracts
Derivative [Line Items]
AOCI, net	0.4
Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivative [Line Items]
Open foreign currency forward contracts designated as cash flow hedges, U.S. dollar equivalent	$ 101.6

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Financial Instruments, Risk Management and Fair Value Measurements - Schedule of Fair Value of Derivative Instruments (Details) $ in Millions	Jun. 30, 2024 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivative assets	$ 0.4
Net derivative assets	0.4
Foreign Exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivative assets	$ 0.4

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Financial Instruments, Risk Management and Fair Value Measurements - Derivatives in Cash Flow Hedging Relationships (Details) - USD ($) $ in Millions		3 Months Ended					6 Months Ended
		Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023		Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]		$ 1,784.2				$ 1,784.2
Other comprehensive (loss)/income, net of tax		$ (10.2)		$ (0.6)	[2]		(30.2)	$ 1.1	[2]
Ending balance		6,262.8					6,262.8
Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		0.2	0.0	0.2		$ 0.0	0.0	0.0
Unrealized hedging gains, net of tax		0.1	0.2	0.4		0.2	0.3	0.6
Other comprehensive (loss)/income, net of tax		0.1	0.2	0.4		0.2
Ending balance		$ 0.3	$ 0.2	$ 0.6		$ 0.2	$ 0.3	$ 0.6

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

[2] Represents the results of predecessor Livent’s operations for three and six months ended June 30, 2023, which do not include the operations of Allkem.

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Financial Instruments, Risk Management and Fair Value Measurements - Derivatives Not Designated As Cash Flow Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Derivative [Line Items]
Amount of pre-tax gain or (loss) recognized in income on derivatives	$ 2.5	$ (0.2)	$ 13.1	$ 1.9
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)
Foreign Exchange contracts
Derivative [Line Items]
Amount of pre-tax gain or (loss) recognized in income on derivatives	$ 2.5	$ (0.2)	$ 13.1	$ 1.9

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Financial Instruments, Risk Management and Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Assets
Investments in deferred compensation plan	$ 6.3		$ 6.3		$ 4.1
JEMSE Receivable	5.0		5.0
Equity securities	1.8		1.8
Derivatives – Foreign exchange	0.4		0.4
Total Assets	13.5		13.5		4.1
Liabilities
Deferred compensation plan obligation	7.2		7.2		6.7
Total Liabilities	7.2		7.2		6.7
Selling, General and Administrative Expenses
Liabilities
Mark-to-market gains (loss) on deferred compensation plan	0.3	$ (0.6)	1.1	$ (0.8)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Investments in deferred compensation plan	6.3		6.3		4.1
JEMSE Receivable	0.0		0.0
Equity securities	1.8		1.8
Derivatives – Foreign exchange	0.0		0.0
Total Assets	8.1		8.1		4.1
Liabilities
Deferred compensation plan obligation	7.2		7.2		6.7
Total Liabilities	7.2		7.2		6.7
Significant Other Observable Inputs (Level 2)
Assets
Investments in deferred compensation plan	0.0		0.0		0.0
JEMSE Receivable	0.0		0.0
Equity securities	0.0		0.0
Total Assets	0.4		0.4		0.0
Liabilities
Deferred compensation plan obligation	0.0		0.0		0.0
Total Liabilities	0.0		0.0		0.0
Significant Unobservable Inputs (Level 3)
Assets
Investments in deferred compensation plan	0.0		0.0		0.0
JEMSE Receivable	5.0		5.0
Equity securities	0.0		0.0
Derivatives – Foreign exchange	0.0		0.0
Total Assets	5.0		5.0		0.0
Liabilities
Deferred compensation plan obligation	0.0		0.0		0.0
Total Liabilities	$ 0.0		$ 0.0		$ 0.0

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Commitments and Contingencies - Narrative (Details) $ in Millions	Jun. 30, 2024 USD ($)	Jan. 04, 2024 USD ($)	Oct. 31, 2023	Oct. 26, 2023	Feb. 28, 2023	Feb. 08, 2023
Lessor, Lease, Description [Line Items]
Export rate, percent of FOB value				1.50%	4.00%
Export LA Puna rate, percent of FOB value						0.025
Remaining export rate, percent of FOB value			0.015			0.015
Export rebate receivable	$ 4.5
Operating lease, weighted average remaining lease term (in years)	8 years 2 months 12 days
Operating lease, weighted average discount rate (as a percent)	8.60%
Allkem Livent Merger
Lessor, Lease, Description [Line Items]
Right of use assets - operating leases, net		$ 53.4
Operating lease liabilities - long-term		$ 53.4
Minimum
Lessor, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	2 years
Maximum
Lessor, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	27 years

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Commitments and Contingencies - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Lease Cost
Operating lease cost	$ 4.2	$ 0.3	$ 8.5	$ 0.6
Short-term lease cost	0.1	0.1	0.2	0.2
Total lease cost	4.3	0.4	8.7	0.8
Cash paid for amounts included in the measurement of lease liabilities:
Cash paid for operating leases	$ 3.8	$ 0.4	$ 8.2	$ 0.7

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Commitments and Contingencies - Maturity Analysis of Operating Lease Liabilities (Details) $ in Millions	Jun. 30, 2024 USD ($)
Undiscounted cash flows
Remainder of 2024	$ 7.3
2025	9.9
2026	9.1
2027	8.3
2028	8.1
Thereafter	31.1
Total future minimum lease payments	73.8
Less: Imputed interest	(19.8)
Total	$ 54.0

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Supplemental Information - Prepaid and Other Current Assets (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Prepaid and other current assets
Tax related items	$ 113.6	$ 29.5
Prepaid expenses	66.3	16.9
Argentina government receivable	15.1	7.9
Other receivables	63.6	28.2
Bank Acceptance Drafts	1.2	0.0
Derivative assets (Note 17)	0.4	0.0
Other current assets	3.8	3.9
Total	$ 264.0	$ 86.4	[1]

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Supplemental Information - Other Assets (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	[2]	Dec. 31, 2023		Nov. 06, 2023
Other assets
Argentina government receivable		$ 128.8			$ 71.3
Advance to contract manufacturers		26.1			27.6
Long-term semi-finished goods inventory		137.4			1.0
Tax related items		4.0			4.0
Capitalized software, net		1.5			1.1
Other assets		44.5			22.7
Total		342.3			127.7	[1]
Condensed Balance Sheet Statements, Captions [Line Items]
Export tax receivable portion		34.8
Payment of deposit to customs authorities	$ 21.7	0.0	$ 21.7
Argentina Government
Condensed Balance Sheet Statements, Captions [Line Items]
Export tax and export rebate receivable		$ 39.3			$ 38.8
Settlement amount to be paid							$ 34.3

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

[2] Represents the results of predecessor Livent’s operations for six months ended June 30, 2023, which do not include the operations of Allkem.

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Supplemental Information - Accrued and Other Current Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Accrued and other current liabilities
Accrued payroll	$ 56.3	$ 31.2
Retirement liability - 401k	4.6	3.2
Environmental reserves, current	3.0	0.5
Severance	1.6	1.7
Accrued investment in unconsolidated affiliates	0.0	27.0
Other accrued and other current liabilities	94.3	73.2
Accrued and other liabilities	$ 159.8	$ 136.8	[1]

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.

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Supplemental Information - Other Long-Term Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Other long-term liabilities
Deferred compensation plan obligation	$ 7.2	$ 6.7
Contingencies related to uncertain tax positions	16.2	6.2
Self-insurance reserves	1.1	1.1
Asset retirement obligations	11.3	3.7
Other long-term liabilities	53.6	3.6
Total	89.4	$ 21.3	[1]
TMA Agreement, Uncertain Tax Positions
Other long-term liabilities
Contingencies related to uncertain tax positions	15.8
TMA Agreement, Indemnification Liability
Other long-term liabilities
Contingencies related to uncertain tax positions	$ 0.4

[1] Represents the financial position of predecessor Livent as of December 31, 2023, which does not include the financial position of Allkem.