SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Fochtman Barbara A

(Last)

(First)

(Middle)

C/O SUITE 12, GATEWAY HUB

SHANNON AIRPORT HOUSE

(Street)

SHANNON

V14 E370

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/01/2024

3. Issuer Name and Ticker or Trading Symbol
Arcadium Lithium plc [ ALTM ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Chief Operations Officer

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares	166,924⁽¹⁾	D
Ordinary Shares	9,624	I	By Spouse

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Stock Option (Right to Buy)	03/06/2027⁽²⁾	03/06/2034	Ordinary Shares	209,425	$4.95	D
Stock Option (Right to Buy)	02/22/2026⁽³⁾	02/22/2033	Ordinary Shares	22,835	$9.7	D
Stock Option (Right to Buy)	02/23/2025⁽³⁾	02/23/2032	Ordinary Shares	25,744	$8.74	D
Stock Option (Right to Buy)	02/22/2024⁽⁴⁾	02/22/2031	Ordinary Shares	77,396	$8.46	D
Stock Option (Right to Buy)	02/26/2023⁽⁴⁾	02/26/2030	Ordinary Shares	12,607	$4.05	D
Stock Option (Right to Buy)	02/15/2021⁽⁴⁾	02/15/2028	Ordinary Shares	24,849	$5.1	D
Stock Option (Right to Buy)	10/10/2022⁽⁴⁾	10/10/2028	Ordinary Shares	48,579	$7.07	D
Stock Option (Right to Buy)	02/27/2020⁽⁴⁾	02/27/2027	Ordinary Shares	41,715	$3.45	D
Stock Option (Right to Buy)	02/13/2019⁽⁴⁾	02/25/2026	Ordinary Shares	23,210	$2.24	D

Explanation of Responses:

1. Includes (i) 6,521 restricted stock units originally granted on February 23, 2022, which are scheduled to vest in full on the third anniversary of the date of grant, (ii) 12,846 restricted stock units originally grants on February 22, 2023, which are scheduled to vest in full on the third anniversary of the date of grant, and (iii) 80,809 restricted stock units granted on March 6, 2024, which are scheduled to vest in equal instalments on each of the first three anniversaries of the date of grant, in each case subject to the terms of the applicable plan and award agreement issued thereunder.

2. Reflects stock options to purchase ordinary shares of the Issuer. The stock options are scheduled to vest and become exercisable in equal instalments on each of the first three anniversaries of the date of grant, subject to the terms of the applicable plan and the applicable award agreement issued thereunder. The stock options will expire on the tenth anniversary of the date of grant.

3. Reflects stock options to purchase ordinary shares of the Issuer. The stock options are scheduled to vest and become exercisable in full on the third anniversary of the date of grant, subject to the terms of the applicable plan and the applicable award agreement issued thereunder. The stock options will expire on the tenth anniversary of the date of grant.

4. Reflects vested stock options to purchase ordinary shares of the Issuer. The stock options will expire on the tenth anniversary of the date of grant.

	/s/ Sara Ponessa, as Attorney-in-Fact	09/04/2024
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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