10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

__________________

FORM 10-Q

__________________

  (Mark One)

 ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2023

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: 001-36384

__________________

MAGNITE, INC.

(Exact name of registrant as specified in its charter)

 __________________

Delaware	20-8881738
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1250 Broadway, 15th Floor
New York, New York 10001
(Address of principal executive offices, including zip code)
Registrant's telephone number, including area code:
(212) 243-2769

______________

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, par value $0.00001 per share	MGNI	Nasdaq Global Select Market

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 Act).   ☐ Yes ☒  No

Indicate the number of shares outstanding of each of the registrant's classes of common stock, as of the latest practicable date.

Class	Outstanding as of May 3, 2023
Common Stock, $0.00001 par value	135,574,532

MAGNITE, INC.

QUARTERLY REPORT ON FORM 10-Q

TABLE OF CONTENTS

		Page No.
Part I.	FINANCIAL INFORMATION	3
Item 1.	Condensed Consolidated Financial Statements (Unaudited)	3
	Condensed Consolidated Balance Sheets as of March 31, 2023 and December 31, 2022	3
	Condensed Consolidated Statements of Operations for the Three Months Ended March 31, 2023 and March 31, 2022	4
	Condensed Consolidated Statements of Comprehensive Loss for the Three Months Ended March 31, 2023 and March 31, 2022	5
	Condensed Consolidated Statements of Stockholders' Equity for the Three Months Ended March 31, 2023 and March 31, 2022	6
	Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2023 and March 31, 2022	7
	Notes to Condensed Consolidated Financial Statements	9
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	25
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	44
Item 4.	Controls and Procedures	45
Part II.	OTHER INFORMATION	46
Item 1.	Legal Proceedings	46
Item 1A.	Risk Factors	46
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	46
Item 6.	Exhibits	48
Signatures		49

2

PART I. FINANCIAL INFORMATION

Item 1. Condensed Consolidated Financial Statements

MAGNITE, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except par values)

(unaudited)

	March 31, 2023		December 31, 2022
ASSETS
Current assets:
Cash and cash equivalents	$	236,550	$	326,254
Accounts receivable, net	875,307		976,506
Prepaid expenses and other current assets	25,098		23,501
TOTAL CURRENT ASSETS	1,136,955		1,326,261
Property and equipment, net	45,641		44,969
Right-of-use lease asset	71,144		78,211
Internal use software development costs, net	23,256		23,671
Intangible assets, net	167,072		253,501
Goodwill	978,217		978,217
Other assets, non-current	7,590		7,383
TOTAL ASSETS	$	2,429,875	$	2,712,213
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable and accrued expenses	$	950,405	$	1,094,321
Lease liabilities, current	20,878		21,172
Debt, current	3,600		3,600
Other current liabilities	7,467		5,939
TOTAL CURRENT LIABILITIES	982,350		1,125,032
Debt, non-current, net of debt issuance costs	674,036		722,757
Lease liabilities, non-current	61,590		66,331
Deferred tax liability, net	4,708		5,072
Other liabilities, non-current	1,962		1,723
TOTAL LIABILITIES	1,724,646		1,920,915
Commitments and contingencies (Note 12)
STOCKHOLDERS' EQUITY
Preferred stock, $0.00001 par value, 10,000 shares authorized at March 31, 2023 and December 31, 2022; 0 shares issued and outstanding at March 31, 2023 and December 31, 2022	—		—
Common stock, $0.00001 par value; 500,000 shares authorized at March 31, 2023 and December 31, 2022; 135,438 and 134,006 shares issued and outstanding at March 31, 2023 and December 31, 2022	2		2
Additional paid-in capital	1,331,517		1,319,221
Accumulated other comprehensive loss	(2,784)		(3,151)
Accumulated deficit	(623,506)		(524,774)
TOTAL STOCKHOLDERS' EQUITY	705,229		791,298
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$	2,429,875	$	2,712,213

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

3

MAGNITE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share amounts)

(unaudited)

	Three Months Ended
	March 31, 2023		March 31, 2022
Revenue	$	130,150	$	118,075
Expenses:
Cost of revenue	124,828		59,396
Sales and marketing	53,049		50,000
Technology and development	24,215		23,043
General and administrative	21,088		18,704
Merger, acquisition, and restructuring costs	7,465		6,756
Total expenses	230,645		157,899
Loss from operations	(100,495)		(39,824)
Other (income) expense:
Interest expense, net	8,175		7,111
Other income	(1,313)		(1,263)
Foreign exchange loss, net	233		926
Gain on extinguishment of debt	(8,549)		—
Total other (income) expense, net	(1,454)		6,774
Loss before income taxes	(99,041)		(46,598)
Benefit for income taxes	(309)		(2,005)
Net loss	$	(98,732)	$	(44,593)
Net loss per share:
Basic and diluted	$	(0.73)	$	(0.34)
Weighted average shares used to compute net loss per share:
Basic and diluted	134,667		132,236

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

4

MAGNITE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(In thousands)

(unaudited)

	Three Months Ended
	March 31, 2023		March 31, 2022
Net loss	$	(98,732)	$	(44,593)
Other comprehensive loss:
Foreign currency translation adjustments	367		110
Other comprehensive income	367		110
Comprehensive loss	$	(98,365)	$	(44,483)

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

5

MAGNITE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands)

(unaudited)

	Common Stock			Additional Paid-In Capital		Accumulated Other Comprehensive Income (Loss)		Accumulated Deficit		Treasury Stock			Total Stockholders’ Equity
	Shares	Amount								Shares	Amount
Balance at December 31, 2021	132,553	$	2	$	1,282,589	$	(1,376)	$	(394,451)	(349)	$	(6,007)	$	880,757
Exercise of common stock options	311	—		1,107		—		—		—	—		1,107
Issuance of common stock related to RSU vesting	783	—		—		—		—		—	—		—
Shares withheld related to net share settlement	(315)	—		(4,260)		—		—		—	—		(4,260)
Purchase of treasury stock		—		—		—		—		(931)	(12,138)		(12,138)
Retirement of common stock	(1,280)			(18,145)		—		—		1,280	18,145		—
Stock-based compensation	—	—		16,927		—		—		—	—		16,927
Other comprehensive income	—	—		—		110		—		—	—		110
Net loss	—	—		—		—		(44,593)		—	—		(44,593)
Balance at March 31, 2022	132,052	$	2	$	1,278,218	$	(1,266)	$	(439,044)	—	$	—	$	837,910

	Common Stock			Additional Paid-In Capital		Accumulated Other Comprehensive Income (Loss)		Accumulated Deficit		Treasury Stock			Total Stockholders’ Equity
	Shares	Amount								Shares	Amount
Balance at December 31, 2022	134,006	$	2	$	1,319,221	$	(3,151)	$	(524,774)	—	$	—	$	791,298
Exercise of common stock options	303	—		1,486		—		—		—	—		1,486
Issuance of common stock related to RSU vesting	1,829	—		—		—		—		—	—		—
Shares withheld related to net share settlement	(700)	—		(9,046)		—		—		—	—		(9,046)
Stock-based compensation	—	—		19,856		—		—		—	—		19,856
Other comprehensive income	—	—		—		367		—		—	—		367
Net loss	—	—		—		—		(98,732)		—	—		(98,732)
Balance at March 31, 2023	135,438	$	2	$	1,331,517	$	(2,784)	$	(623,506)	—	$	—	$	705,229

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

6

MAGNITE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(unaudited)

	Three Months Ended
	March 31, 2023		March 31, 2022
OPERATING ACTIVITIES:
Net loss	$	(98,732)	$	(44,593)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	95,795		45,866
Stock-based compensation	19,287		16,589
Impairment of intangible assets	—		3,320
Gain on extinguishment of debt	(8,549)		—
Gain on disposal of property and equipment	(26)		(2)
Provision for doubtful accounts	67		(571)
Amortization of debt discount and issuance costs	1,669		1,700
Non-cash lease expense	34		610
Deferred income taxes	(404)		(1,891)
Unrealized foreign currency (gain) loss, net	(1,463)		458
Other items, net	2,696		—
Changes in operating assets and liabilities, net of effect of business acquisitions:
Accounts receivable	100,142		146,241
Prepaid expenses and other assets	(2,063)		(2,279)
Accounts payable and accrued expenses	(141,068)		(141,312)
Other liabilities	1,722		(2,504)
Net cash (used in) provided by operating activities	(30,893)		21,632
INVESTING ACTIVITIES:
Purchases of property and equipment	(4,404)		(7,184)
Capitalized internal use software development costs	(3,063)		(3,382)
Mergers and acquisitions, net of cash acquired	—		(20,755)
Net cash used in investing activities	(7,467)		(31,321)
FINANCING ACTIVITIES:
Proceeds from exercise of stock options	1,486		1,107
Repayment of debt	(900)		(900)
Repurchase of Convertible Senior Notes	(40,828)		—
Repayment of financing lease	(208)		(197)
Purchase of treasury stock	—		(12,138)
Taxes paid related to net share settlement	(9,046)		(4,260)
Payment of indemnification claims holdback	(2,313)		—
Net cash used in financing activities	(51,809)		(16,388)
EFFECT OF EXCHANGE RATE CHANGES ON CASH, CASH EQUIVALENTS AND RESTRICTED CASH	265		268
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(89,904)		(25,809)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH — Beginning of period	326,502		230,693
CASH, CASH EQUIVALENTS AND RESTRICTED CASH — End of period	$	236,598	$	204,884

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

7

MAGNITE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(unaudited)

	Three Months Ended
	March 31, 2023		March 31, 2022
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH TO CONSOLIDATED BALANCE SHEETS
Cash and cash equivalents	$	236,550	$	204,589
Restricted cash included in prepaid expenses and other current assets	48		242
Restricted cash included in other assets, non-current	—		53
Total cash, cash equivalents and restricted cash	$	236,598	$	204,884
SUPPLEMENTAL DISCLOSURES OF OTHER CASH FLOW INFORMATION:
Cash paid for income taxes	$	1,547	$	338
Cash paid for interest	$	8,987	$	5,668
Capitalized assets financed by accounts payable and accrued expenses	$	3,320	$	372
Capitalized stock-based compensation	$	569	$	338
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$	271	$	—
Purchase consideration - indemnification claims holdback	$	—	$	2,300

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

8

MAGNITE, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Note 1—Organization and Summary of Significant Accounting Policies

Company Overview

Magnite, Inc. ("Magnite" or the "Company") was formed in Delaware and began operations on April 20, 2007. On April 1, 2020, Magnite completed a stock-for-stock merger with Telaria, Inc. ("Telaria" and such merger the "Telaria Merger"), a leading sell-side advertising platform and provider of connected television ("CTV") technology. On April 30, 2021, the Company completed its acquisition of SpotX, Inc. ("SpotX" and such acquisition the "SpotX Acquisition"), a leading CTV and video advertising platform. On July 1, 2021, the Company completed its acquisition of SpringServe, LLC ("SpringServe" and such acquisition the "SpringServe Acquisition"), a leading ad serving platform for CTV. Magnite has its principal offices in New York City, Los Angeles, Denver, London, and Sydney, and additional offices in Europe, Asia, North America, and South America.

The Company provides a technology solution to automate the purchase and sale of digital advertising inventory for buyers and sellers globally, across all channels, formats and auction types. The Company’s platform features applications and services for sellers of digital advertising inventory, or publishers, that own or operate websites, applications, CTV channels, and other digital media properties, to manage and monetize their inventory; applications and services for buyers, including advertisers, agencies, agency trading desks, and demand side platforms, to buy digital advertising inventory; and a transparent, independent marketplace that brings buyers and sellers together and facilitates intelligent decision making and automated transaction execution at scale. The Company's clients include many of the world's leading sellers and buyers of digital advertising inventory.

Basis of Presentation and Summary of Significant Accounting Policies

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair statement of the results for the interim period presented have been included. Operating results for the three months ended March 31, 2023 are not necessarily indicative of the results that may be expected for any future interim period, the year ending December 31, 2023, or for any future year.

The condensed consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto for the year ended December 31, 2022 included in its 2022 Annual Report on Form 10-K.

There have been no significant changes in the Company's accounting policies from those disclosed in its audited consolidated financial statements and notes thereto for the year ended December 31, 2022 included in its Annual Report on Form 10-K.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported and disclosed financial statements and accompanying footnotes. Due to the economic uncertainty of macroeconomic challenges, such as inflation, global conflict, capital market disruptions and instability of financial institutions, the occurrence of a recession, and other macroeconomic factors, it has become more difficult to apply certain assumptions and judgments into these estimates. The extent of the impact of these factors on the Company's operational and financial performance will depend on future developments, which are highly uncertain and cannot be predicted, including but not limited to the duration and how quickly and to what extent normal economic and operating conditions can resume. During the three months ended March 31, 2023, this uncertainty continued to result in a higher level of judgment related to its estimates and assumptions. As of the date of issuance of the condensed consolidated financial statements for the three months ended March 31, 2023, the Company is not aware of any specific event or circumstance that would require the Company to update its estimates, judgments, or revise the carrying value of its assets or liabilities. These estimates may change, as new events occur and additional information is obtained, and are recognized in the consolidated financial statements as soon as they become known. Actual results could differ materially from these estimates.

Recently Adopted Accounting Standards

In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805) – Accounting for Contract Assets and Contract Liabilities from Contracts with Customers ("ASU 2021-08"). ASU 2021-08 requires the recognition and measurement of contract assets and contract liabilities acquired in a business combination in accordance with ASC 606, Revenue from Contracts with Customers. Considerations to determine the amount of contract assets and contract liabilities to record at the acquisition date

9

include the terms of the acquired contract, such as timing of payment, identification of each performance obligation in the contract and allocation of the contract transaction price to each identified performance obligation on a relative standalone selling price basis as of contract inception. ASU 2021-08 is effective for the Company beginning in the first quarter of 2023. The Company adopted this standard January 1, 2023 and will apply the guidance to future acquisitions, if any.

Note 2—Net Loss Per Share

The following table presents the basic and diluted net loss per share:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands, except per share data)
Basic and Diluted Loss Per Share:
Net loss	$	(98,732)	$	(44,593)
Weighted-average common shares outstanding	134,667		132,236
Weighted-average common shares outstanding used to compute net loss per share	134,667		132,236
Basic and diluted loss per share	$	(0.73)	$	(0.34)

The following weighted-average shares have been excluded from the calculation of diluted net loss per share attributable to common stockholders for each period presented because they are anti-dilutive:

	Three Months Ended
	March 31, 2023	March 31, 2022
	(in thousands)
Options to purchase common stock	1,742	2,593
Unvested restricted stock units	1,738	2,415
Unvested performance stock units	135	152
ESPP shares	17	—
Convertible Senior Notes	6,026	6,262
Total shares excluded from net loss per share	9,658	11,422

For the three months ended March 31, 2023 and 2022, the Company excluded outstanding performance stock units from the calculation of diluted net loss per share because they were anti-dilutive. As of March 31, 2023, the performance stock units granted in 2020, 2021, 2022, and 2023 had expected achievement levels of 94%, 0%, 54% and 29%, respectively. As of March 31, 2022, the performance stock units granted in 2020, 2021, and 2022 had expected achievement levels of 121%, 0%, and 51% respectively. Refer to Note 9—"Stock-Based Compensation" for additional information related to performance stock units.

For the three months ended March 31, 2023 and March 31, 2022, shares that would be issuable assuming conversion of all of the Convertible Senior Notes (as defined in Note 13) were excluded from the calculation of diluted loss per share because they were anti-dilutive. Diluted earnings per share for the Convertible Senior Notes is calculated under the if-converted method in accordance with ASC 260, Earnings Per Share. The Convertible Senior Notes have an initial conversion rate of 15.6539 shares of common stock per $1,000 principal amount of the Convertible Senior Notes, which will be subject to anti-dilution adjustments in certain circumstances. As of March 31, 2023 and 2022, the number of shares that would be issuable assuming conversion of all of the Convertible Senior Notes is approximately 5,474,952 and 6,261,560, respectively. Refer to Note 13—"Debt" for additional information related to accounting for Convertible Senior Notes issued and associated Capped Call Transactions.

Note 3—Revenue

For the majority of transactions on the Company's platform, the Company reports revenue on a net basis as it does not act as the principal in the purchase and sale of digital advertising inventory because it does not have control of the digital advertising inventory and does not set prices agreed upon within the auction marketplace. For certain advertising campaigns that are transacted through insertion orders, the Company reports revenue on a gross basis, based primarily on its determination that the Company acts as the primary obligor in the delivery of advertising campaigns for buyers with respect to such transactions.

The following table presents the Company's revenue recognized on a net basis and on a gross basis for the three months ended March 31, 2023 and 2022:

10

	Three Months Ended
	March 31, 2023				March 31, 2022
	(in thousands, except percentages)
Revenue:
Net basis	$	107,457	83	%	$	100,076	85	%
Gross basis	22,693		17		17,999		15
Total	$	130,150	100	%	$	118,075	100	%

The following table presents the Company's revenue by channel for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023				March 31, 2022
	(in thousands, except percentages)
Channel:
CTV	$	59,050	45	%	$	51,440	44	%
Mobile	48,184		37		39,029		33
Desktop	22,916		18		27,606		23
Total	$	130,150	100	%	$	118,075	100	%

    The following table presents the Company's revenue disaggregated by geographic location, based on the location of the Company's sellers for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
United States	$	97,156	$	90,408
International	32,994		27,667
Total	$	130,150	$	118,075

Payment terms are specified in agreements between the Company and the buyers and sellers on its platform. The Company generally bills buyers at the end of each month for the full purchase price of impressions filled in that month. The Company recognizes volume discounts as a reduction of revenue as they are incurred. Specific payment terms may vary by agreement, but are generally 75 days or less. The Company's accounts receivable are recorded at the amount of gross billings to buyers, net of allowances for the amounts the Company is responsible to collect. The Company's accounts payable related to amounts due to sellers are recorded at the net amount payable to sellers (see Note 5). Accordingly, both accounts receivable and accounts payable appear large in relation to revenue reported on a net basis.

Accounts receivable are recorded at the invoiced amount, are unsecured, and do not bear interest. The allowance for doubtful accounts is reviewed quarterly, requires judgment, and is based on the best estimate of the amount of probable credit losses in existing accounts receivable. The Company reviews the status of the then-outstanding accounts receivable on a customer-by-customer basis, taking into consideration the aging schedule of receivables, its historical collection experience, current information regarding the client, subsequent collection history, and other relevant data, in establishing the allowance for doubtful accounts. Accounts receivable is presented net of an allowance for doubtful accounts of $1.7 million at March 31, 2023, and $1.1 million at December 31, 2022. Accounts receivable are written off against the allowance for doubtful accounts when the Company determines amounts are no longer collectible.

The Company reviews the associated payable to sellers for recovery of buyer receivable allowance and write-offs; in some cases, the Company can reduce the payable to sellers. The reduction of seller payables related to recovery of uncollected buyer receivables is netted against allowance expense. The contra seller payables related to recoveries were $1.1 million and $0.6 million as of March 31, 2023 and December 31, 2022, respectively.

11

The following is a summary of activity in the allowance for doubtful accounts for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Allowance for doubtful accounts, beginning balance	$	1,092	$	3,475
Write-offs	(16)		—
Increase (decrease) in provision for expected credit losses	586		(1,466)
Recoveries of previous write-offs	—		87
Allowance for doubtful accounts, ending balance	$	1,662	$	2,096

During the three months ended March 31, 2023, the provision for expected credit losses associated with accounts receivable increased by $0.6 million, offset by increases of contra seller payables related to recoveries of uncollected buyer receivables of $0.5 million, which resulted in $0.1 million of bad debt expense. During the three months ended March 31, 2022, the provision for expected credit losses associated with accounts receivable decreased by $1.5 million, offset by decreases of contra seller payables related to recoveries of uncollected buyer receivables of an $0.9 million amount, which resulted in $0.6 million of bad debt expense.

Note 4—Fair Value Measurements

Recurring Fair Value Measurements    

Fair value represents the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Observable inputs are based on market data obtained from independent sources. The fair value hierarchy is based on the following three levels of inputs, of which the first two are considered observable and the last one is considered unobservable:

•Level 1 – Quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

•Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.

•Level 3 – Unobservable inputs.

The table below sets forth a summary of financial instruments that are measured at fair value on a recurring basis at March 31, 2023:

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs  (Level 3)
	(in thousands)
Cash equivalents	$	22,636	$	22,636	$	—	$	—

The table below sets forth a summary of financial instruments that are measured at fair value on a recurring basis at December 31, 2022:

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs  (Level 3)
	(in thousands)
Cash equivalents	$	259,647	$	259,647	$	—	$	—

At March 31, 2023 and December 31, 2022, cash equivalents of $22.6 million and $259.6 million, respectively, consisted of money market funds and commercial paper, with original maturities of three months or less. The carrying amounts of cash equivalents are classified as Level 1 or Level 2 depending on whether or not their fair values are based on quoted market prices for identical securities that are traded in an active market.

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At March 31, 2023 and December 31, 2022, the Company had Convertible Senior Notes and its Term Loan B Facility (as defined in Note 13) included in its balance sheets. The estimated fair value of the Company's Convertible Senior Notes was $282.4 million and $305.0 million as of March 31, 2023 and December 31, 2022, respectively. The estimated fair value of Convertible Senior Notes is based on market rates and the closing trading price of the Convertible Senior Notes as of March 31, 2023 and December 31, 2022 and is classified as Level 2 in the fair value hierarchy. At March 31, 2023 and December 31, 2022, the estimated fair value of the Company's Term Loan B Facility was $341.3 million and $333.3 million, respectively. The estimated fair value is based on borrowing rates currently available to the Company for financing with similar terms and is classified as Level 2 in the fair value hierarchy.

There were no transfers between Level 1 and Level 2 fair value measurements during the three months ended March 31, 2023 and 2022.

Note 5—Other Balance Sheet Amounts

Accounts payable and accrued expenses included the following:

	March 31, 2023		December 31, 2022
	(in thousands)
Accounts payable—seller	$	913,047	$	1,057,556
Accounts payable—trade	21,725		19,387
Accrued employee-related payables	15,633		15,065
Accrued holdback - indemnification claims	—		2,313
Total	$	950,405	$	1,094,321

Note 6—Goodwill, Intangible Assets, Internal Use Software Development Costs, and Capitalized Costs Incurred in Cloud Computing Arrangements

The Company's goodwill balance as of March 31, 2023 and December 31, 2022 was $978.2 million.

The Company’s intangible assets as of March 31, 2023 and December 31, 2022 included the following:

	March 31, 2023		December 31, 2022
	(in thousands)
Amortizable intangible assets:
Developed technology	$	390,136	$	390,136
Customer relationships	136,000		136,000
In-process research and development	12,730		12,730
Non-compete agreements	900		900
Trademarks	900		900
Total identifiable intangible assets, gross	540,666		540,666
Accumulated amortization—intangible assets:
Developed technology	(254,521)		(184,439)
Customer relationships	(111,984)		(97,316)
In-process research and development	(5,889)		(4,398)
Non-compete agreements	(675)		(562)
Trademarks	(525)		(450)
Total accumulated amortization—intangible assets	(373,594)		(287,165)
Total identifiable intangible assets, net	$	167,072	$	253,501

Amortization of intangible assets for the three months ended March 31, 2023 and 2022 was $86.4 million and $38.5 million, respectively. During the first quarter of 2022, the Company abandoned certain in-process research and development projects and technology intangible assets. The abandonment resulted in $3.3 million of impairment costs in the three months ended

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March 31, 2022, which was included within merger, acquisition, and restructuring costs in the condensed consolidated statement of operations.

During the fourth quarter of 2022, the Company reassessed the remaining estimated useful lives of the developed technology and in-process research and development related to the SpotX acquisition based on the remaining expected benefit from those assets. The change in the remaining estimated useful lives for developed technology and in-process research and development resulted in increased amortization expense of $52.1 million for the three months ended March 31, 2023. The increased amortization expense increased the basic and diluted loss per share by $0.38, net of tax, for the three months ended March 31, 2023.

The estimated remaining amortization expense associated with the Company's intangible assets was as follows as of March 31, 2023:

Fiscal Year	Amount
	(in thousands)
Remaining 2023	$	116,061
2024	30,134
2025	14,445
2026	6,001
2027	431
Total	$	167,072

The Company capitalizes certain internal use software development costs associated with creating and enhancing internally developed software related to the Company’s technology infrastructure. During the fourth quarter of 2022, the Company reassessed the remaining estimated useful lives of capitalized software projects related to integration of its technology platforms. The change in the remaining estimated useful lives for the related projects resulted in increased amortization expense of $1.1 million for the three months ended March 31, 2023. The increased amortization expense increased the basic and diluted loss per share by $0.01, net of tax, for the three months ended March 31, 2023.

The Company capitalizes costs related to arrangements for infrastructure as a service, platform as a service, and software as a service. As of March 31, 2023 and December 31, 2022, capitalized costs associated with these arrangements was included within prepaid expenses and other current assets in the amounts of $0.7 million and $0.7 million, respectively, and within other assets, non-current in the amounts of $0.4 million and $0.5 million, respectively. The amortization of these agreements was immaterial for the three months ended March 31, 2023 and 2022.

Note 7—Business Combinations

2022 Acquisition—Carbon

The Company completed the acquisition of the business of Carbon (AI) Limited ("Carbon" and such acquisition the "Carbon Acquisition"), a platform that enables publishers to measure, manage, and monetize audience segments, in February 2022 for a total purchase price of $23.1 million in cash. Approximately $2.3 million of the purchase price was held back to cover possible indemnification claims, which was subsequently paid out in February 2023.

Note 8—Merger, Acquisition, and Restructuring Costs

Merger, acquisition, and restructuring costs consist primarily of professional services fees and employee termination costs, including stock-based compensation charges, associated with the Telaria Merger, the SpotX Acquisition, and restructuring activities.

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The following table summarizes merger, acquisition, and restructuring cost activity (in thousands):

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Personnel related (severance and one-time termination benefit costs)	$	3,218	$	717
Loss contracts (facilities related)	2,190		—
Exit costs	1,408		—
Impairment of property and equipment, net	506		—
Non-cash stock-based compensation (double-trigger acceleration and severance)	143		1,944
Impairment costs of abandoned technology	—		3,320
Professional services (investment banking advisory, legal and other professional services)	—		775
Total merger, acquisition, and restructuring costs	$	7,465	$	6,756

During the three months ended March 31, 2023 and 2022, the Company incurred costs of $7.5 million and $6.8 million, respectively, related to restructuring activities as a result of the Company's consolidation of its legacy CTV and SpotX CTV platforms following the SpotX Acquisition. During the three months ended March 31, 2023, these activities included the Company's reduction of its global workforce primarily associated with the elimination of duplicative roles and other costs associated with the the consolidation of its platforms, including loss contracts office facilities the Company does not plan to continue to occupy and impairment charges related to certain assets it no longer plans to utilize. During the three months ended March 31, 2022 the Company incurred costs primarily related to restructuring activities following the SpotX Acquisition.

Accrued restructuring costs related to mergers and acquisitions were $2.8 million and $1.2 million at March 31, 2023 and December 31, 2022, respectively, and were primarily related the Company's consolidation of its platforms as mentioned above and the Telaria Merger. Accrued restructuring costs associated with personnel costs are included within accounts payable and accrued expenses and accruals related to exit costs are included within other current liabilities and other liabilities, non-current on the Company's condensed consolidated balance sheets.

	(in thousands)
Accrued restructuring costs at December 31, 2022	$	1,222
Personnel related and non-cash stock-based compensation	3,361
Loss contracts (facilities related)	2,190
Exit costs	1,408
Impairment of property and equipment, net	506
Cash paid for restructuring costs	(3,043)
Non-cash loss contracts (facilities related)	(2,190)
Non-cash impairments	(506)
Non-cash stock-based compensation	(143)
Accrued restructuring costs at March 31, 2023	$	2,805

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Note 9—Stock-Based Compensation

Stock Options

A summary of stock option activity for the three months ended March 31, 2023 is as follows:

	Shares Under Option	Weighted- Average Exercise Price		Weighted- Average Contractual Life	Aggregate Intrinsic Value
	(in thousands)				(in thousands)
Outstanding at December 31, 2022	4,672	$	8.71
Granted	130	$	10.59
Exercised	(303)	$	4.91
Expired	(24)	$	35.81
Outstanding at March 31, 2023	4,475	$	8.88	5.8 years	$	13,756
Exercisable at March 31, 2023	3,551	$	7.39	5.2 years	$	12,905

The total intrinsic value of options exercised during the three months ended March 31, 2023 was $1.7 million. At March 31, 2023, the Company had unrecognized employee stock-based compensation expense relating to nonvested stock options of approximately $8.3 million, which is expected to be recognized over a weighted-average period of 2.4 years. Total grant date fair value of options vested during the three months ended March 31, 2023 was $2.2 million.

The Company estimates the fair value of stock options that contain service and/or performance conditions using the Black-Scholes option pricing model. The grant date fair value of options granted during the three months ended March 31, 2023 was $7.27 per share. The weighted-average input assumptions used by the Company were as follows:

	Three Months Ended
	March 31, 2023		March 31, 2022
Expected term (in years)	5.0		5.0
Risk-free interest rate	3.99	%	1.63	%
Expected volatility	84	%	79	%
Dividend yield	—	%	—	%

Restricted Stock Units

A summary of restricted stock unit activity for the three months ended March 31, 2023 is as follows:

	Number of Shares		Weighted-Average Grant Date Fair Value
	(in thousands)
Restricted stock units outstanding at December 31, 2022	10,000		$	15.06
Granted	6,793		$	10.72
Canceled	(826)		$	13.66
Vested and released	(1,829)		$	14.01
Restricted stock units outstanding at March 31, 2023	14,138	*	$	13.19
Restricted stock units outstanding and unvested	14,120		$	13.20
*At March 31, 2023, outstanding restricted stock units included 18,436 units that were vested but deferred.

The weighted-average grant date fair value per share of restricted stock units granted during the three months ended March 31, 2023 was $10.72. The intrinsic value of restricted stock units that vested during the three months ended March 31, 2023 was $23.5 million. At March 31, 2023, the intrinsic value of unvested restricted stock units was $130.7 million. At March 31, 2023, the Company had unrecognized stock-based compensation expense relating to unvested restricted stock units of approximately $167.0 million, which is expected to be recognized over a weighted-average period of 3.1 years.

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Performance Stock Units

The Company has granted performance stock units ("PSU") to select executive employees that vest based on share price metrics tied to total shareholder return relative to a peer group over a three-year period. The grant date fair value for such PSUs was estimated using a Monte-Carlo simulation model that incorporates option-pricing inputs covering the period from the grant date through the end of the performance period. Between 0% and 150% of the performance stock units will vest on the third anniversary of the respective grant date.

The Company has additionally granted PSUs to the Company's CEO which are subject to both time-based and performance-based vesting conditions. The PSUs consist of three equal tranches (each, a "Performance Tranche"), based on achievement of a share price condition if the Company achieves share price targets of $60.00, $80.00, and $100.00, respectively, over 60 consecutive trading days during a performance period commencing on August 26, 2022 and ending on August 26, 2026. The grant date fair value for such PSUs was estimated using a Monte-Carlo simulation model that incorporates option-pricing inputs covering the period from the grant date through the end of the performance period. To the extent any of the performance-based requirements are met, the Company's CEO must also provide continued service to the Company through at least August 26, 2024 to receive any shares of common stock underlying the grant and through August 26, 2026 to receive all of the shares of common stock underlying the performance units that have satisfied the applicable performance-based requirement.

Stock-based compensation expense for PSUs is based on a performance measurement of 100%. The compensation expense will not be reversed if the performance metrics are not met.

A summary of performance stock units activity for the three months ended March 31, 2023 is as follows:

	Number of Shares	Weighted-Average Grant Date Fair Value
	(in thousands)
Outstanding at December 31, 2022	639	$	19.02
Granted	474	$	13.32
Outstanding at March 31, 2023	1,113	$	16.59

The grant date fair value for the PSUs was estimated using a Monte-Carlo simulation model. The weighted-average input assumptions used by the Company were as follows:

	Three Months Ended
	March 31, 2023		March 31, 2022
Expected term (in years)	3.0		3.0
Risk-free interest rate	4.19	%	1.39	%
Expected volatility of Magnite	94	%	84	%
Expected volatility of selected peer companies	64	%	63	%
Expected correlation coefficients of Magnite	0.62		0.56
Expected correlation coefficients of selected peer companies	0.54		0.52
Dividend yield	—	%	—	%

As of March 31, 2023, the Company had unrecognized stock-based compensation expense relating to outstanding PSUs of approximately $12.0 million, which will be recognized over a weighted-average period of 2.9 years.

Stock-Based Compensation Expense

Total stock-based compensation expense recorded in the condensed consolidated statements of operations was as follows:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Cost of revenue	$	468	$	350
Sales and marketing	7,405		5,341
Technology and development	5,446		4,717
General and administrative	5,825		4,237
Merger, acquisition, and restructuring costs	143		1,944
Total stock-based compensation expense	$	19,287	$	16,589

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An aggregate of 14,781,139 shares remained available for future grants at March 31, 2023 under the Company's 2014 Equity Incentive Plan. The 2014 Equity Incentive Plan has an evergreen provision pursuant to which the share reserve automatically increased on January 1, 2023 in an amount equal to 5% of the total number of shares of capital stock outstanding on December 31, 2022. This plan expires in November 2023.

As of March 31, 2023, the Company has reserved 5,169,575 shares of its common stock for issuance under the Company's 2014 Employee Stock Purchase Plan ("ESPP"). The ESPP has an evergreen provision pursuant to which the share reserve automatically increased on January 1, 2023 in the amount equal to 1% of the total number of shares of capital stock outstanding on December 31, 2022. This plan expires in April 2024.

Note 10—Income Taxes

In determining quarterly provisions for income taxes, the Company uses the annual estimated effective tax rate applied to the actual year-to-date income. The Company's annual estimated effective tax rate differs from the statutory rate primarily as a result of state taxes, foreign taxes, deductible stock option expenses, nondeductible executive compensation, and changes in the Company's valuation allowance.

The Company recorded an income tax benefit of $0.3 million and $2.0 million for the three months ended March 31, 2023 and 2022, respectively. The tax benefit for the three months ended March 31, 2023 and March 31, 2022 is primarily the result of recognizing the benefit of deferred tax assets ("DTAs") previously subject to the domestic valuation allowance and the foreign income tax provision. The Company continues to maintain a partial valuation allowance for the domestic DTAs.

On August 16, 2022, President Biden signed the Inflation Reduction Act of 2022 (the “IRA”) into law. The IRA includes a new corporate alternative minimum tax (the “Corporate AMT”) of 15% on the adjusted financial statement income (the “AFSI”) of corporations with average AFSI exceeding $1.0 billion over a three-year period. The Corporate AMT is effective for tax years beginning after December 31, 2022 and is not expected to impact the Company. Additionally, the IRA imposes an excise tax of 1% on the fair market value of net stock repurchases made after December 31, 2022. The impact of this latter provision to the Company will be dependent upon the extent of share repurchases made in future periods.

Due to uncertainty as to the realization of benefits from the Company's domestic and certain international DTAs, including net operating loss carryforwards and research and development tax credits, the Company has a partial valuation allowance reserved against such assets. The Company intends to continue to maintain a partial valuation allowance on the DTAs until there is sufficient evidence to support the reversal of all or some additional portion of these allowances.

Due to the net operating loss carryforwards, all of the Company's United States federal and a majority of its state returns are open to examination by the Internal Revenue Service and state jurisdictions for all years since inception. For the Netherlands, Malaysia, India, Sweden, and the United Kingdom, all tax years remain open for examination by the local country tax authorities, for France only 2020 and forward are open, for Singapore only 2019 and forward are open for examination, for Australia, Brazil, Germany, and New Zealand 2018 and forward are open for examination, for Canada 2017 and forward are open for examination, and for Japan and Italy 2016 and forward remain open for examination.

Pursuant to Section 382 of the Internal Revenue Code, the Company and Telaria, Inc. both underwent ownership changes for tax purposes (i.e. a more than 50% change in stock ownership in aggregated 5% shareholders) on April 1, 2020 due to the Telaria Merger. As a result, the use of our total domestic NOL carryforwards and tax credits generated prior to the ownership change will be subject to annual use limitations under Section 382 and Section 383 of the Code and comparable state income tax laws. The Company believes that the ownership change will not impact our ability to utilize substantially all of our NOLs and state research and development carryforward tax credits to the extent it will generate taxable income that can be offset by such losses. The Company reasonably expects its pre-2021 federal research and development carryforward tax credits will not be recovered prior to expiration.

There was no material change to the Company's unrecognized tax benefits in the three months ended March 31, 2023 and the Company does not expect to have any material changes to unrecognized tax benefits through the end of the fiscal year.

Note 11—Lease Obligations

For the three months ended March 31, 2023 and 2022, the Company recognized $6.5 million and $5.6 million, respectively, of operating lease expense associated with leases included in the lease liability and right of use ("ROU") asset on the condensed consolidated balance sheets. For lease expenses not included in the Company's ROU asset and lease liability balances, the Company recognized short term lease expense of $0.2 million and $0.3 million, respectively, and variable lease expense of $0.9 million and $0.5 million, respectively, during the three months ended March 31, 2023 and 2022.

The Company also received rental income of $1.3 million and $1.3 million for real estate leases for which it subleases the property to third parties during the three months ended March 31, 2023 and 2022, respectively.

As of March 31, 2023 and December 31, 2022, a weighted average discount rate of 6.13% and 6.11%, respectively, has been applied to the remaining lease payments to calculate the lease liabilities included within the condensed consolidated balance

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sheet. The lease terms of the Company’s operating leases generally range from one year to ten years, and the weighted average remaining lease term of leases included in the lease liability is 5.5 years and 5.6 years as of March 31, 2023 and December 31, 2022, respectively.

The maturity of the Company's lease liabilities associated with leases included in the lease liability and ROU asset were as follows as of March 31, 2023 (in thousands):

Fiscal Year
Remaining 2023	$	19,311
2024	22,299
2025	14,487
2026	12,020
2027	7,431
Thereafter	21,011
Total lease payments (undiscounted)	96,559
Less: imputed interest	(14,091)
Lease liabilities—total (discounted)	$	82,468

In addition to the lease liabilities included in these condensed consolidated financial statements, the Company entered into an agreement for office space that had not commenced as of March 31, 2023; therefore, the lease was not included in the lease liability and ROU asset balance as of March 31, 2023. The Company has future commitments totaling $2.3 million over a term of 10.0 years related to this agreement.

Note 12—Commitments and Contingencies

Commitments

The Company has commitments under non-cancelable operating leases for facilities, certain equipment, and its managed data center facilities (Note 11).

As of March 31, 2023 and December 31, 2022, the Company had $5.3 million and $5.3 million, respectively, of letters of credit associated with office leases available for borrowing, on which there were no outstanding borrowings as of either date.

In the normal course of business, the Company enters into non-cancelable contractual obligations with various parties, primarily related to software services agreements and data center providers that are not included in the Company's lease liability obligations and ROU assets. As of March 31, 2023, the Company's outstanding non-cancelable contractual obligations with a remaining term of one year or longer consist of the following (in thousands):

Fiscal Year
Remaining 2023	$	3,058
2024	6,953
2025	2,091
Total	$	12,102

Additionally, as of March 31, 2023, the Company has an agreement for cloud-managed services containing commitments that are variable in nature. Under this agreement, the Company has a non-cancelable minimum spend commitment from July 2023 to June 2025 based on actual spend, as defined in the agreement, with the third-party provider from July 2022 to June 2023. The estimated non-cancelable minimum annual obligation is approximately $42 million in each twelve-month period (i.e. July 2023 to June 2024 and July 2024 to June 2025), based on spend in the nine months ended March 31, 2023. Per the agreement, the commitment from July 2023 to June 2025 will generally increase as the amount of spend during the period from July 2022 to June 2023 increases. Because the Company expects to continue to spend under this agreement through June 2023, the Company also expects that the minimum future commitment will likely increase as a result of the higher level of spend.

Guarantees and Indemnification

The Company’s agreements with sellers, buyers, and other third parties typically obligate the Company to provide indemnity and defense for losses resulting from claims of intellectual property infringement, damages to property or persons, business losses, or other liabilities. Generally, these indemnity and defense obligations relate to the Company’s own business

19

operations, obligations, and acts or omissions. However, under some circumstances, the Company agrees to indemnify and defend contract counterparties against losses resulting from their own business operations, obligations, and acts or omissions, or the business operations, obligations, and acts or omissions of third parties. For example, because the Company’s business interposes the Company between buyers and sellers in various ways, buyers often require the Company to indemnify them against acts and omissions of sellers, and sellers often require the Company to indemnify them against acts and omissions of buyers. In addition, the Company’s agreements with sellers, buyers, and other third parties typically include provisions limiting the Company’s liability to the counterparty, and the counterparty’s liability to the Company. These limits sometimes do not apply to certain liabilities, including indemnity obligations. These indemnity and limitation of liability provisions generally survive termination or expiration of the agreements in which they appear. The Company has also entered into indemnification agreements with its directors, executive officers, and certain other officers that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers, or employees. No material demands have been made upon the Company to provide indemnification under such agreements and there are no claims that the Company is aware of that could have a material effect on the Company’s consolidated financial statements.

Litigation

The Company and its subsidiaries may from time to time be parties to legal or regulatory proceedings, lawsuits and other claims incident to their business activities and to the Company’s status as a public company. Such matters may include, among other things, assertions of contract breach or intellectual property infringement, claims for indemnity arising in the course of the Company’s business, regulatory investigations or enforcement proceedings, and claims by persons whose employment has been terminated. Such matters are subject to many uncertainties, and outcomes are not predictable with assurance. Consequently, management is unable to ascertain the ultimate aggregate amount of monetary liability, amounts which may be covered by insurance or recoverable from third parties, or the financial impact with respect to such matters as of March 31, 2023. However, based on management’s knowledge as of March 31, 2023, management believes that the final resolution of these matters known at such date, individually and in the aggregate, will not have a material adverse effect upon the Company’s consolidated financial position, results of operations or cash flows.

Employment Contracts

The Company has entered into severance agreements with certain employees and officers. The Company may be required to pay severance and accelerate the vesting of certain equity awards in the event of involuntary terminations.

Note 13—Debt

Long term debt as of March 31, 2023 and December 31, 2022 consisted of the following:

	March 31, 2023		December 31, 2022
	(in thousands)
Convertible Senior Notes	$	349,750	$	400,000
Less: Unamortized debt issuance cost	(5,931)		(7,355)
Net	343,819		392,645
Term Loan B Facility	353,700		354,600
Less: Unamortized discount and debt issuance cost	(19,883)		(20,888)
Net	333,817		333,712
Less: Current portion	(3,600)		(3,600)
Total non-current debt	$	674,036	$	722,757

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Maturities of the principal amount of the Company's long-term debt as of March 31, 2023 are as follows (in thousands):

Fiscal Year
Remaining 2023	2,700
2024	3,600
2025	3,600
2026	353,350
2027	3,600
Thereafter	336,600
Total	$	703,450

Amortization of the debt issuance cost and the discount associated with our indebtedness totaled $1.6 million for the three months ended March 31, 2023 and $1.6 million for the three months ended March 31, 2022. Amortization of debt issuance costs is computed using the effective interest method and is included in interest expense. In addition, amortization of deferred financing costs was $0.1 million for the three months ended March 31, 2023 and 2022. Deferred financing costs are included in prepaid expenses and other current assets and other assets, non-current assets.

Convertible Senior Notes and Capped Call Transactions

In March 2021, the Company issued $400.0 million aggregate principal amount of 0.25% convertible senior notes in a private placement, including $50.0 million aggregate principal amount of such notes pursuant to the exercise in full of the over-allotment options of the initial purchasers (collectively, the "Convertible Senior Notes"). The Convertible Senior Notes will mature on March 15, 2026, unless earlier repurchased, redeemed or converted. The total net proceeds from the offering, after deducting debt issuance costs, paid by the Company, were approximately $388.6 million. The Company used approximately $39.0 million of the net proceeds from the offering to pay for the Capped Call Transactions (as described below).

The Convertible Senior Notes are senior, unsecured obligations and are (i) equal in right of payment with the existing and future senior, unsecured indebtedness; (ii) senior in right of payment to any of the Company’s future indebtedness that is expressly subordinated to the Convertible Senior Notes; (iii) effectively subordinated to the Company’s existing and future secured indebtedness, to the extent of the value of the collateral securing that indebtedness, including amounts outstanding under our Loan Agreement or our new Credit Agreement (see section below); and (iv) structurally subordinated to all existing and future indebtedness and other liabilities, including trade payables, and (to the extent we are not a holder thereof) preferred equity, if any, of the Company’s subsidiaries that do not guarantee the Convertible Senior Notes.

The Convertible Senior Notes accrue interest at 0.25% per annum payable semi-annually in arrears on March 15 and September 15 of each year, beginning on September 15, 2021. The Convertible Senior Notes will mature on March 15, 2026 unless they are redeemed, repurchased or converted prior to such date. The Convertible Senior Notes are convertible at the option of holders only during certain periods and upon satisfaction of certain conditions.

Holders have the right to convert their notes (or any portion of a note in an authorized denomination), in the following circumstances: (i) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021, if the last reported sale price per share of the Company’s common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (ii) during the five consecutive business days immediately after any ten consecutive trading day period (such ten consecutive trading day period, the "measurement period") in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of the Company’s common stock on such trading day and the conversion rate on such trading day; (iii) upon the occurrence of certain corporate events or distributions on the Company’s common stock; (iv) if the Company calls such Convertible Senior Notes for redemption; and (v) on or after September 15, 2025, until the close of business on the second scheduled trading day immediately before the maturity date, holders of the Convertible Senior Notes may, at their option, convert all or a portion of their Convertible Senior Notes regardless of the foregoing conditions at any time from, and including, September 15, 2025 until the close of business on the second scheduled trading day immediately before the maturity date.

Upon conversion, the Convertible Senior Notes may be settled in shares of the Company’s common stock, cash or a combination of cash and shares of the Company’s common stock, at the Company’s election. All conversions with a conversion date that occurs on or after September 15, 2025 will be settled using the same settlement method, and the Company will send notice of such settlement method to noteholders no later than the open of business on September 15, 2025.

The Company may not redeem the Convertible Senior Notes at their option at any time before March 20, 2024. Subject to the terms of the indenture agreement, the Company has the right, at its election, to redeem all, or any portion (subject to the partial

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redemption limitation) in an authorized denomination, of the Convertible Senior Notes, at any time, and from time to time, on a redemption date on or after March 20, 2024 and on or before the 40th scheduled trading day immediately before the maturity date, for cash, but only if the "last reported sale price," as defined under the Offering Memorandum, per share of common stock exceeds 130% of the “conversion price” on (i) each of at least 20 trading days, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date the Company sends the related redemption notice; and (ii) the trading day immediately before the date we send such notice. In addition, calling any note for redemption will constitute a "make-whole fundamental change" (as defined below) with respect to that note, in which case the conversion rate applicable to the conversion of that note will be increased in certain circumstances if it is converted after it is called for redemption. If the Company elects to redeem less than all of the outstanding notes, then the redemption will not constitute a make-whole fundamental change with respect to the notes not called for redemption, and holders of the notes not called for redemption will not be entitled to an increased conversion rate for such notes as described above on account of the redemption, except to the limited extent described further below. No sinking fund is provided for the Convertible Senior Notes, which means that the Company is not required to redeem or retire the Convertible Senior Notes periodically.

If a fundamental change occurs, then each noteholder will have the right to require the Company to repurchase its notes (or any portion thereof in an authorized denomination) for cash on a date (the "fundamental change repurchase date") of the Company’s choosing, which must be a business day that is no more than 45, nor less than 20, business days after the date the Company distributes the related fundamental change notice.

If an event of default, other than a reporting default remedied by special interest as defined in the indenture agreement, occurs with respect to the Company or any guarantor, then the principal amount of, and all accrued and unpaid interest on, all of the notes then outstanding will immediately become due and payable without any further action or notice by any person. If an event of default (other than a reporting event of default described above with respect to the Company or any guarantor and not solely with respect to a significant subsidiary of the Company’s or a guarantor, other than the Company or such guarantor) occurs and is continuing, then, the trustee, by notice to the Company, or noteholders of at least 25% of the aggregate principal amount of notes then outstanding, by written notice to the Company and the trustee, may declare the principal amount of, and all accrued and unpaid interest on, all of the notes then outstanding to become due and payable immediately.

The Convertible Senior Notes have an initial conversion rate of 15.6539 shares of common stock per $1,000 principal amount of the Convertible Senior Notes, which will be subject to customary anti-dilution adjustments in certain circumstances.

In connection with the pricing of the Convertible Senior Notes, the Company entered into privately negotiated capped call transactions with various financial institutions (the "Capped Call Transactions"). The Capped Call Transactions were entered into with third party broker-dealers to limit the potential dilution that would occur if the Company has to settle the conversion value in excess of the principal in shares. This exposure will be covered (i.e., the Company will receive as many shares as are required to be issued between the conversion price of $63.8818 and the maximum price of $91.2600). Any shares required to be issued by the Company over this amount would have net earnings per share dilution impact. By entering into the Capped Call Transactions, the Company expects to reduce the potential dilution to its common stock (or, in the event the conversion is settled in cash, to reduce its cash payment obligation) in the event that at the time of conversion its stock price exceeds the conversion price under the Convertible Senior Notes. The Company paid $39.0 million for the Capped Call Transactions, which was recorded as additional paid-in capital, using a portion of the gross proceeds from the sale of the Convertible Senior Notes. The cost of the Capped Call Transactions is not expected to be tax deductible as the Company did not elect to integrate the capped call into the Convertible Senior Notes for tax purposes. The cost of the Capped Call Transaction was recorded as a reduction of the Company’s additional paid-in capital in the accompanying condensed consolidated financial statements.

The Company incurred debt issuance costs of $11.4 million in March 2021. The Convertible Senior Notes are presented net of issuance costs on the Company's condensed consolidated balance sheets. The debt issuance costs are amortized on an effective interest basis over the term of the Convertible Senior Notes and are included in interest expense and amortization of debt discount in the accompanying condensed consolidated statements of operations.

In March 2023, the Company repurchased a portion of its Convertible Senior Notes in the open market with cash on hand for $40.8 million. The Company recognized a gain on extinguishment of debt of $8.5 million related to the repurchase of $50.3 million of principal balance of Convertible Senior Notes and $0.9 million of unamortized debt issuance costs associated with the

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extinguished debt. The gain on extinguishment is included in other (income) expense in the Company's condensed consolidated statement of operations.

The following table sets forth interest expense related to the Convertible Senior Notes for the three months ended March 31, 2023 and 2022 (in thousands, except interest rates):

	Three Months Ended
	March 31, 2023			March 31, 2022
Contractual interest expense	$	241		$	250
Amortization of debt issuance costs	551			572
Total interest expense	$	792		$	822
Effective interest rate	0.82		%	0.82		%

Amortization expense for the Company's debt issuance costs related to the Convertible Senior Notes for the fiscal years 2023 through 2026 is as follows (in thousands):

Fiscal Year	Debt Issuance Costs
Remaining 2023	1,499
2024	2,001
2025	2,001
2026	430
Total	$	5,931

Credit Agreement

On April 30, 2021, the Company entered into a credit agreement (the "Credit Agreement") with Goldman Sachs Bank USA as administrative agent and collateral agent, and other lender parties thereto. The Credit Agreement provides for a $360.0 million seven-year senior secured term loan facility ("Term Loan B Facility") and a $52.5 million senior secured revolving credit facility (the "Revolving Credit Facility"). As part of the Term Loan B Facility, the Company received $325 million in proceeds, net of discounts and fees, which were used to finance the SpotX Acquisition and related transactions, and for general corporate purposes. Loans, if any, under the Revolving Credit Facility are expected to be used for general corporate purposes. The obligations under the Credit Agreement are secured by substantially all of the assets of the Company and those of its subsidiaries that are guarantors under the Credit Agreement.

Amounts outstanding under the Credit Agreement accrue interest at a rate equal to either, (1) for the Term Loan B Facility, at the Company’s election, the Eurodollar Rate (as defined in the Credit Agreement) plus a margin of 5.00% per annum, or ABR (as defined in the Credit Agreement) plus a margin of 4.00%, and (2) for the Revolving Credit Facility, at the Company’s election, the Eurodollar Rate plus a margin of 4.25% to 4.75%, or ABR plus a margin of 3.25% to 3.75%, in each case, depending on the Company’s first lien net leverage ratio. As of March 31, 2023, the contractual interest rate related to the Term Loan B Facility was 9.91%.

The covenants of the Credit Agreement include customary negative covenants that, among other things, restrict the Company’s ability to incur additional indebtedness, grant liens and make certain acquisitions, investments, asset dispositions and restricted payments. In addition, the Credit Agreement contains a financial covenant, tested on the last day of any fiscal quarter if utilization of the Revolving Credit Facility exceeds 35% of the total revolving commitments, that requires the Company to maintain a first lien net leverage ratio not greater than 3.25 to 1.00. As of March 31, 2023, the Company was in compliance with its debt covenants.

The Credit Agreement includes customary events of default, and customary rights and remedies upon the occurrence of any event of default thereunder, including rights to accelerate the loans, terminate the commitments thereunder and realize upon the collateral securing the obligations under the Credit Agreement. The Credit Agreement calls for customary scheduled loan amortization payments of 0.25% of the initial principal balance payable quarterly (i.e. 1% in aggregate per year) as well as a provision that requires the Company to prepay the Term Loan B based on an annual calculation of cumulative free cash flow ("Excess Cash Flow") generated by the company as defined within the terms of the Agreement. The Company was not required to make any such mandatory prepayment required by the Excess Cash Flow provision for the period ended March 31, 2023. In addition, the Credit Agreement will mature in the event that any portion of the Convertible Senior Notes remains outstanding 91 days prior to the maturity date of the Convertible Senior Notes.

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On June 28, 2021, the Company entered into an Incremental Assumption Agreement (the "Incremental Agreement") to the Credit Agreement. Pursuant to the terms of the Incremental Agreement, the Company’s existing revolving credit facility under the Credit Agreement was increased by $12.5 million (the "Incremental Revolver"), and the letter of credit sublimit under the Credit Agreement was increased by $5.0 million. The Incremental Revolver bears the same interest rate as the existing revolving credit facility and has the same maturity date as the existing revolving credit facility. No other terms of the Credit Agreement were amended. As a result, amounts available under the Revolving Credit Facility were $65.0 million. At March 31, 2023, amounts available under the Revolving Credit Facility were $59.7 million, net of letters of credit outstanding in the amount of $5.3 million.

The following table summarizes the amount outstanding under the Term Loan B Facility at March 31, 2023 and December 31, 2022:

	March 31, 2023		December 31, 2022
	(in thousands)
Term Loan B Facility	$	353,700	$	354,600
Unamortized debt discounts	(7,765)		(8,158)
Unamortized debt issuance costs	(12,118)		(12,730)
Debt, net of debt issuance costs	$	333,817	$	333,712

The Company incurred debt issuance costs of $27.7 million in April 2021, of which $10.8 million were associated with debt discount netted against the proceeds and $16.9 million were associated with other deferred financing costs associated with the Term Loan B Facility. Debt outstanding under the Term Loan B Facility are presented net of issuance costs on the Company's condensed consolidated balance sheets. The debt issuance costs are amortized on an effective interest basis over the term of the Term Loan B Facility and are included in interest expense and amortization of debt discount in the accompanying condensed consolidated statements of operations.

The following table sets forth interest expense related to the Term Loan B Facility for the three months ended March 31, 2023 and 2022 (in thousands, except interest rates):

	Three Months Ended
	March 31, 2023			March 31, 2022
Contractual interest expense	$	8,436		$	5,163
Amortization of debt discount	393			397
Amortization of debt issuance costs	612			619
Total interest expense	$	9,441		$	6,179
Effective interest rate	10.65		%	6.98		%

Amortization expense for the Term Loan B Facility debt discount and debt issuance costs for fiscal years 2023 through 2028 is as follows (in thousands):

Fiscal Year	Debt Discount		Debt Issuance Costs
Remaining 2023	$	1,171	$	1,829
2024	1,548		2,416
2025	1,532		2,391
2026	1,516		2,366
2027	1,500		2,341
Thereafter	498		775
Total	$	7,765	$	12,118

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Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations

This Quarterly Report on Form 10-Q and related statements by the Company contain forward-looking statements, including statements based upon or relating to our expectations, assumptions, estimates, and projections. In some cases, you can identify forward-looking statements by terms such as "may," "might," "will," "objective," "intend," "should," "could," "can," "would," "expect," "believe," "design," "anticipate," "estimate," "predict," "potential," "plan" or the negative of these terms, and similar expressions. Forward-looking statements may include, but are not limited to, statements concerning acquisitions by the Company, including the acquisition of SpotX, Inc. ("SpotX," and such acquisition the "SpotX Acquisition"), the acquisition of SpringServe, LLC ("SpringServe," and such acquisition the "SpringServe Acquisition"), and the merger with Telaria, Inc. ("Telaria," and such merger the "Telaria Merger"), or the anticipated benefits thereof; statements concerning potential synergies from the Company's acquisitions; statements concerning macroeconomic conditions, including inflation, supply chain issues or the occurrence of a recession, or concerns related thereto; our anticipated financial performance; key strategic objectives; industry growth rates for ad-supported connected television ("CTV") and the shift in video consumption from linear TV to CTV; anticipated benefits of new offerings, including the introduction of our new Magnite Streaming platform and our ClearLine solution; the impact of our traffic shaping technology on our business; the success of the consolidation of our two CTV platforms; the effects of our cost reduction initiatives; scope and duration of client relationships; the fees we may charge in the future; business mix; sales growth; benefits from supply path optimization; the development of identity solutions; client utilization of our offerings; our competitive differentiation; our market share and leadership position in the industry; market conditions, trends, and opportunities; certain statements regarding future operational performance measures; and other statements that are not historical facts. These statements are not guarantees of future performance; they reflect our current views with respect to future events and are based on assumptions and estimates and subject to known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from expectations or results projected or implied by forward-looking statements.

Risks that our business faces include, but are not limited to, the following:

•our ability to realize the anticipated benefits of the SpotX Acquisition, SpringServe Acquisition, and other acquisitions;

•the impact of macroeconomic challenges on the overall demand for advertising and the advertising marketplace, including as a result of global conflict, global pandemics and the responses to such pandemics by governments, inflation, supply chain issues, capital market disruptions and instability of financial institutions, the occurrence of a recession, or concerns relating to the foregoing;

•CTV spend on our platform may grow more slowly than we expect if industry growth rates for ad supported CTV are not accurate, if CTV sellers fail to adopt programmatic advertising solutions or if we are unable to maintain or increase access to CTV advertising inventory;

•we may be unsuccessful in our supply path optimization efforts with buyers;

•our ability to introduce new offerings and bring them to market in a timely manner and potential responses or reactions of clients, vendors, and competitors to the announcement of new products and offerings;

•uncertainty of our estimates and expectations associated with new offerings, including our SpringServe ad server, ClearLine product, and our developing identity solutions;

•potential negative impacts associated with the integration of our CTV platforms and the introduction of Magnite Streaming;

•we must increase the scale and efficiency of our technology infrastructure to support our growth;

•the emergence of header bidding has increased competition from other demand sources and may cause infrastructure strain and added costs;

•our access to mobile inventory may be limited by third-party technology or lack of direct relationships with mobile sellers;

•we may experience lower take rates, which may not be offset by increases in the volume of ad requests, improvements in fill-rate, and/or increases in the value of transactions through our platform;

•the impact of requests for discounts, fee concessions, rebates, refunds or favorable payment terms;

•our business may be subject to sales and use tax, advertising and other taxes;

•failure by us or our clients to meet advertising and inventory content standards;

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•the freedom of buyers and sellers to direct their spending and inventory to competing sources of inventory and demand, and to establish direct relationships and integrations without the use of our platform;

•our reliance on large aggregators of advertising inventory, and the concentration of CTV among a small number of large sellers that enjoy significant negotiating leverage;

•our ability to provide value to both buyers and sellers of advertising without being perceived as favoring one over the other or being perceived as competing with them through our service offerings;

•our reliance on large sources of advertising demand, including demand side platforms ("DSPs") that may have or develop high-risk credit profiles or fail to pay invoices when due;

•our sales efforts may require significant time and expense and may not yield the results we seek;

•we may be exposed to claims from clients for breach of contract;

•the effects of seasonal trends on our results of operations;

•we operate in an intensely competitive market that includes companies that have greater financial, technical and marketing resources than we do;

•the effects of consolidation in the ad tech industry or among our media clients;

•our ability to differentiate our offerings and compete effectively to combat commodification and disintermediation;

•potential limitations on our ability to collect or use data as a result of consumer tools, regulatory restrictions and technological limitations;

•the development and use of new identity solutions as a replacement for third-party cookies and other identifiers may disrupt the programmatic ecosystem and cause the performance of our platform to decline;

•the industry may not adopt or may be slow to adopt the use of first-party publisher segments as an alternative to third-party cookies;

•the impact of antitrust regulations or enforcement actions targeting the digital advertising ecosystem;

•our ability to comply with, and the effect on our business of, evolving legal standards and regulations, particularly concerning data protection and privacy;

•errors or failures in the operation of our solution, interruptions in our access to network infrastructure or data, and breaches of our computer systems;

•our ability to ensure a high level of brand safety for our clients and to detect "bot" traffic and other fraudulent or malicious activity;

•our ability to attract and retain qualified employees and key personnel;

•costs associated with enforcing our intellectual property rights or defending intellectual property infringement;

•our ability to comply with the terms of our financing arrangements;

•restrictions in our Credit Agreement may limit our ability to make strategic investments, respond to changing market conditions, or otherwise operate our business;

•increases in our debt leverage may put us at greater risk of defaulting on our debt obligations, subject us to additional operating restrictions and make it more difficult to obtain future financing on favorable terms;

•conversion of our Convertible Senior Notes would dilute the ownership interest of existing stockholders;

•the Capped Call Transactions subject us to counterparty risk and may affect the value of the Convertible Senior Notes and our common stock;

•the conditional conversion feature of the Convertible Senior Notes, if triggered, may adversely affect our financial condition and operating result;

•failure to successfully execute our international growth plans;

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•failure to maintain an effective system of internal control over financial reporting, which could adversely affect investor confidence;

•the use of our net operating losses and tax credit carryforwards may be subject to certain limitations;

•our ability to raise additional capital if needed and the elimination of LIBOR;

•volatility in the price of our common stock;

•the impact of our repurchase program on our stock price and cash reserves;

•competition for investors and the impact of negative analyst or investor research reports; and

•provisions of our charter documents and Delaware law may inhibit a potential acquisition of the company and limit the ability of stockholders to cause changes in company management.

We discuss many of these risks and additional factors that could cause actual results to differ materially from those anticipated by our forward-looking statements under the headings "Risk Factors" and "Management's Discussion and Analysis of Financial Condition and Results of Operations," and elsewhere in this report and in other filings we have made and will make from time to time with the Securities and Exchange Commission, or SEC, including our Annual Report on Form 10-K for the year ended December 31, 2022 and subsequent filings. These forward-looking statements represent our estimates and assumptions only as of the date of the report in which they are included. Unless required by federal securities laws, we assume no obligation to update any of these forward-looking statements, or to update the reasons actual results could differ materially from those anticipated, to reflect circumstances or events that occur after the statements are made. Without limiting the foregoing, any guidance we may provide will generally be given only in connection with quarterly and annual earnings announcements, without interim updates, and we may appear at industry conferences or make other public statements without disclosing material nonpublic information in our possession. Given these uncertainties, investors should not place undue reliance on these forward-looking statements.

Investors should read this Quarterly Report on Form 10-Q and the documents that we reference in this report and have filed or will file with the SEC completely and with the understanding that our actual future results may be materially different from what we expect. We qualify all of our forward-looking statements by these cautionary statements.

The following discussion should be read in conjunction with our unaudited condensed consolidated financial statements and notes thereto appearing elsewhere in this Quarterly Report on Form 10-Q.

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Overview

Magnite, Inc., ("we," or "us"), provides technology solutions to automate the purchase and sale of digital advertising inventory.

On April 1, 2020, we completed a stock-for-stock merger with Telaria, Inc. ("Telaria" and such merger the "Telaria Merger"), a leading provider of connected television ("CTV") technology, and on April 30, 2021, we completed the acquisition of SpotX, Inc. ("SpotX" and such acquisition the "SpotX Acquisition"), a leading platform shaping CTV and video advertising globally. On July 1, 2021, we acquired SpringServe, LLC ("SpringServe"), a leading ad serving platform for CTV. SpringServe's ad serving technology manages multiple aspects of video advertising, including for CTV publishers, across both programmatic and direct-sold inventory, including forecasting, routing, customized ad experiences and ad formats, and advanced podding logic.

Following these acquisitions, we believe that we are the world’s largest independent omni-channel sell-side advertising platform ("SSP"), offering a single partner for transacting globally across all channels, formats and auction types, and the largest independent programmatic CTV marketplace, making it easier for buyers to reach CTV audiences at scale from industry-leading streaming content providers, broadcasters, platforms and device manufacturers.

Our platform features applications and services for sellers of digital advertising inventory, or publishers, that own and operate CTV channels, applications, websites and other digital media properties, to manage and monetize their inventory; applications and services for buyers, including advertisers, agencies, agency trading desks, and demand side platforms, ("DSPs"), to buy digital advertising inventory; and a transparent, independent marketplace that brings buyers and sellers together and facilitates intelligent decision making and automated transaction execution at scale. Our clients include many of the world’s leading buyers and sellers of digital advertising inventory. Our platform processes trillions of ad requests per month allowing buyers access to a global, scaled, independent alternative to "walled gardens," who both own and sell inventory and maintain control on the demand side.

We provide a full suite of tools for sellers to control their advertising business and protect the consumer viewing experience. These tools are particularly important to CTV sellers who need to ensure a TV-like viewing and advertising experience for consumers. For instance, our "ad-pod" feature provides publishers with a tool analogous to commercial breaks in traditional linear television so that they can request and manage several ads at once from different demand sources. Using this tool, publishers can establish business rules such as competitive separation of advertisers to ensure that competing brand ads do not appear during the same commercial break. Other tools we offer include audio normalization tools to control for the volume of an ad relative to content, frequency capping to avoid exposing viewers to repetitive ad placements, and creative review so that a publisher can review and approve the ad units being served to its properties. In addition, through the integration of our SSP and ad server we are able to offer a holistic work flow and yield management solution that dynamically allocates between direct-sold and programmatic inventory to drive value.

Buyers leverage our platform to manage their advertising spend and reach their target audiences on brand-safe premium inventory, simplify order management and campaign tracking, obtain actionable insights into audiences for their advertising, and access impression-level purchasing from thousands of sellers. We believe that our scale, platform features, and omni-channel offering makes us an essential partner for buyers.

We operate our business on a worldwide basis, with an established operating presence in North America, Australia and Europe, and a developing presence in Asia and South America. Our non-U.S. subsidiaries and operations perform primarily sales, marketing, and service functions.

How We Generate Revenue

Digital advertising inventory is created when consumers access sellers' content. Sellers provide digital advertising inventory to our platform in the form of advertising requests, or ad requests. When we receive ad requests from sellers, we send bid requests to buyers, which enable buyers to bid on sellers’ digital advertising inventory. Winning bids can create advertising, or paid impressions, for the seller to present to the consumer. The price that buyers pay for each thousand paid impressions purchased is measured in units referred to as CPM, or cost per thousand, and the total volume of spending between buyers and sellers on our platform is referred to as advertising spend.

We generate revenue from the use of our platform for the purchase and sale of digital advertising inventory. Generally, our revenue is based on a percentage of the ad spend that runs through our platform, although for certain clients or transaction types we may receive a fixed CPM for each impression sold, and for advertising campaigns that are transacted through insertion orders, we earn revenue based on the full amount of ad spend that runs through our platform. We also generate revenue from our SpringServe

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ad server and Demand Manager header-bidding product, where fees are generally based on the number of impressions processed. In addition, we may receive certain fixed monthly fees for the use of our platforms or products.

Industry Trends

Continued Shift Toward Digital Advertising

Consumers are rapidly shifting their viewing habits towards digital mediums and expect to be able to consume content seamlessly across multiple devices, including computers, tablets, smartphones, and CTVs whenever and wherever they want. As digital content consumption continues to proliferate, we believe the percentage of advertising dollars spent through digital channels will continue to grow.

Automation of Buying and Selling

Due to the size and complexity of the advertising ecosystem and purchasing process, manual processes cannot effectively manage digital advertising inventory at scale. In addition, both buyers and sellers are demanding more transparency, better controls and more relevant insights from their advertising inventory purchases and sales. This has created a need for software solutions, known as programmatic advertising, that automate the process for planning, buying, selling and measuring digital advertising across screens. Programmatic advertising allows buyers and sellers to transact on an impression-by-impression basis through the use of real-time bidding technology, and allows for the use of advanced data and identity solutions to better target ad campaigns. Programmatic transactions include open auctions, where multiple buyers bid against each other in a real-time auction for the right to purchase a publisher's inventory, as well as reserve auctions, where publishers establish direct deals or private marketplaces with select buyers. Programmatic is the dominant method of transacting for desktop, CTV, and mobile inventory.

Convergence of TV and Digital

CTV viewership is growing rapidly and the pace of adoption is accelerating the transition of linear television to CTV programming. As the number of CTV channels continues to proliferate, we believe that ad-supported models or hybrid models that rely on a combination of subscription fees and advertising revenue will continue to gain traction. In turn, we believe brand advertisers looking to engage with streaming viewers will continue to shift their budgets from linear to CTV. Furthermore, as the CTV market continues to mature, we believe that a greater percentage of CTV advertising inventory will be sold programmatically, similar to trends that occurred in desktop and mobile. As such, we expect CTV to be a significant driver of our revenue growth for the foreseeable future.

Identity Solutions

A number of participants in the advertising technology ecosystem have taken or are expected to take action to eliminate or restrict the use of third-party cookies and other primary identifiers that have historically been used to deliver targeted advertisements. We believe that the elimination of third-party cookies has the potential to shift the programmatic ecosystem from an identity model powered by buyers that are able to aggregate and target audiences through cookies to one enabled by sellers that have direct relationships with consumers and are therefore better positioned to obtain user data and consent for implementing first party identifiers. In CTV, this identity model already largely exists with publishers more tightly controlling access to identifiers and user data, while offering proprietary first party data segments for reaching desired audiences. We believe that our scale and expertise in CTV position us well to take a leadership position in advancing this shift to a first party identity model and creating additional value opportunities for our clients. Accordingly, we have invested and intend to further invest in the development and enhancement of industry leading identity and audience solutions. In furtherance of this goal, in December 2021, we acquired Nth Party, Ltd. ("Nth Party"), a developer of cryptographic software for secure audience data sharing and analysis, and in February 2022, we acquired Carbon (AI) Limited ("Carbon"), a platform that enables publishers to measure, manage, and monetize audience segments.

We support industry privacy initiatives and believe that the next generation of identity solutions need to be open and ubiquitous, with consumer privacy, transparency and control at the core. We further believe that these solutions will ultimately lead to greater trust and consumer confidence in digital advertising, which will be positive for the advertising ecosystem in the long term. In the short term, however, these changes could create some variability in our revenue across certain buyers or sellers, depending on the timing of changes and developed solutions.

Supply Path Optimization

Supply Path Optimization ("SPO") refers to efforts by buyers to consolidate the number of vendors with which they work to find the most effective and cost-efficient paths to procure media. SPO is important to buyers because it can increase the proportion of their advertising ultimately spent on working media, with the goal of increasing return on their advertising spend, and can help them gain efficiencies by reducing the number of vendors with which they work in a complex ecosystem. In furtherance of these goals, in April 2023 we announced the launch of ClearLine, a self-service solution that provides agencies direct access to premium advertising on our platform. This solution helps agencies maximize the spend going towards working media, makes it easier for sellers and agencies to securely share data, improves workflow for campaigns traditionally transacted manually, and helps publishers generate more revenue and develop new sources of unique demand. We believe we are well positioned to benefit from SPO in the long run as a result of our transparency, our broad and unique inventory supply across all channels and formats,

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including CTV, buyer tools, such as traffic shaping and ClearLine that reduce the cost of working with us, and our brand safety measures.

Header Bidding and Data Processing

Header bidding is a programmatic technique by which sellers offer inventory to multiple ad exchanges and supply side platforms, such as our platform, simultaneously. Header bidding has been rapidly adopted in recent years in the desktop and mobile channels and has experienced modest adoption in CTV. The adoption of header bidding has created a number of challenges and technical complexities for both sellers and buyers, which require sophisticated tools to manage. In addition, header bidding has led to a significant increase in the number of ad impressions to be processed and analyzed through our platform as well as by DSPs, which can lead to increased costs if not properly addressed. We have invested in technology solutions, such as Demand Manager, to help desktop and mobile publishers manage their header-bidding inventory.

While header-bidding technologies have not been largely adopted by CTV sellers, such solutions or similar solutions geared towards increasing demand competition have become more prevalent. We have addressed this, in part, through our SpringServe ad server, which offers sellers a unified programmatic demand solution for CTV that leverages our existing programmatic SSP capabilities as well as connecting with third party programmatic demand sources.

Privacy Regulation

Our business is highly susceptible to existing and emerging privacy regulations and oversight concerning the collection, use and sharing of data. Data protection authorities in the United States and around the world have focused on the advertising technology ecosystem. Because we, and our clients, rely upon large volumes of such data, it is essential that we monitor developments in this area domestically and globally, and engage in responsible privacy practices.

We do not collect information that can be used directly to identify a real person, such as name, address, or phone number, and we take steps to avoid collecting and storing such information. Instead, we rely on pseudonymous forms of data such as IP addresses, general geo-location information, and persistent identifiers about Internet users and do not attempt to associate this data with other data that can be used to identify real people. Increasingly, this type of information is considered "personal" across various jurisdictions and is therefore governed by consumer privacy laws and may be the subject of future legislation or regulation.

There are also a number of specific laws and regulations governing the collection and use of certain types of consumer data relevant to our business. For example, the Children’s Online Privacy Protection Act ("COPPA"), imposes restrictions on the collection and use of data about users of child-directed websites.

In the European Economic Area ("EEA") member states and the United Kingdom (“UK”), the use and transfer of personal data is governed by the General Data Protection Regulation and the UK General Data Protection Regulation (the "GDPR" and "UK GDPR"). The GDPR and UK GDPR set out significant potential liabilities for certain data protection violations and establish significant regulatory requirements resulting in a greater compliance burden for us in the course of delivering our solution in the EEA and UK.

In addition to the GDPR and UK GDPR, a number of recent privacy regulations will or have already come into effect in the United States. California was the first state to enact an omnibus consumer privacy law in 2018, the California Consumer Privacy Act ("CCPA"), which became effective January 1, 2020. This law imposes substantial obligations on businesses that handle the personal information of California residents. The obligations imposed require us to maintain ongoing significant resources for compliance purposes. In addition, amendments to the CCPA, along with broad-based consumer privacy laws in Connecticut, Colorado, Virginia, and Utah, will all take effect by the end of 2023 and impose obligations that are similar to the CCPA. These new laws will cause us to incur additional compliance costs and impose additional restrictions on us and on our industry partners. In addition, other privacy bills have been introduced at both the state and federal level and certain international territories are imposing new or expanded privacy obligations. In the coming years, we expect further consumer privacy regulation worldwide.

Additionally, our compliance with our privacy policies and our general consumer privacy practices are also subject to review by the Federal Trade Commission, which may bring enforcement actions to challenge allegedly unfair and deceptive trade practices, including the violation of privacy policies and representations therein. Certain State Attorneys General may also bring enforcement actions based on comparable state laws or federal laws that permit state-level enforcement. Outside of the United States, our privacy and data practices are subject to regulation by data protection authorities and other regulators in the countries in which we do business.

Beyond laws and regulations, we are members of self-regulatory bodies that impose additional requirements related to the collection, use, and disclosure of consumer data, including the Internet Advertising Bureau ("IAB"), the Digital Advertising Alliance, the Network Advertising Initiative, and the Europe Interactive Digital Advertising Alliance. Under the requirements of these self-regulatory bodies, in addition to other compliance obligations, we provide consumers with notice via our privacy policy about our use of cookies and other technologies to collect consumer data, and of our collection and use of consumer data to deliver personalized advertisements. We allow consumers to opt-out from the use of data we collect for purposes of behavioral advertising

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through a mechanism on our website, linked through our privacy policy as well as through portals maintained by some of these self-regulatory bodies.

We support privacy initiatives and believe they will be beneficial to consumers' confidence in advertising technology, which will ultimately be positive for the advertising ecosystem in the long term. However, until prevailing compliance practices standardize, the impact of worldwide privacy regulations on our business and, consequently, our revenue could be negatively impacted.

For additional information regarding regulatory risks to our business, see "Item 1A. Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2022.

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Trends in Our Business

As CTV viewership is growing rapidly and the pace of adoption is accelerating the shift of advertising budgets from linear television to CTV, we believe we have strategically positioned ourselves to take advantage of this trend, and that CTV will be our biggest growth driver in future periods.

The SpotX Acquisition resulted in a significant increase in our revenue and Revenue ex-TAC (as defined in section "Key Operating and Financial Performance Metrics"), in particular in CTV and online video. Following the transaction, the percentage of our revenue attributable to CTV increased significantly, and because CTV is largely transacted through reserve auctions, these types of auctions have become a more significant portion of the transactions on our platform. The acquisition also resulted in an increase in related operating expenses, primarily associated with costs for personnel, data center and hosting costs, facilities, payments to sellers for revenue reported on a gross basis, and other ancillary costs to support the business. We have been able to offset some of these increases through cost saving activities and the achievement of acquisition synergies. As part of our integration efforts, we recently introduced our unified CTV platform, Magnite Steaming, which merges leading technology from the legacy Magnite CTV and SpotX CTV platforms. We expect client migration to our unified platform to occur primarily through the first half of 2023 and expect the migration to be completed early in the third quarter of 2023. We are continuing to support certain aspects of our legacy CTV platforms through this transition, resulting in some temporary duplication of costs.

The SpringServe Acquisition, expanded our video and CTV offering to include ad server functionality in addition to our programmatic SSP capabilities. The SpringServe ad server manages multiple aspects of video advertising for both programmatic transactions and inventory sold directly by the publisher, including forecasting, routing, customized ad experiences and ad formats, and advanced podding logic. Combined with our SSP, the SpringServe ad server provides publishers a holistic yield management solution that works across their entire video advertising business to drive value. This is of particular importance for CTV publishers, who still sell a large percentage of their inventory through their direct sales team. We believe the acquisition of SpringServe is highly strategic as it allows us to offer publishers an independent full-stack solution to the walled gardens, which can be leveraged across their entire video advertising business.

During the three months ended March 31, 2023, we announced a reduction of our global workforce by approximately 6%. The reduction in force was primarily associated with the elimination of duplicative technology roles resulting from the integration of our CTV platforms and represent additional cost synergies related to our acquisition.

Macroeconomic Developments

Our business has been negatively impacted as a result of macroeconomic challenges, such as inflation, global conflict, capital market disruptions and instability of financial institutions, the occurrence of a recession, and other macroeconomic factors, which have generally negatively impacted ad budgets, and in turn led to reduced ad spend through our platform. Any worsening of macroeconomic conditions in future periods would likely have a negative effect on our financial results, the magnitude of which is difficult to predict. In addition, continued inflation could result in an increase in our cost base relative to our revenue.

Refer to Item 1A. "Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2022 for additional information related to risks associated with macroeconomic challenges.

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Components of Our Results of Operations

We report our financial results as one operating segment. Our consolidated operating results are regularly reviewed by our chief operating decision maker, principally to make decisions about how we allocate our resources and to measure our consolidated operating performance.

Revenue

We generate revenue from the use of our platform for the purchase and sale of digital advertising inventory. Generally, our revenue is based on a percentage of the ad spend that runs through our platform, although for certain clients or transaction types we may receive a fixed CPM for each impression sold, and for advertising campaigns that are transacted through insertion orders, we earn revenue based on the full amount of ad spend that runs through our platform. We also generate revenue from our ad server and Demand Manager header-bidding product, where fees are either based on the number of impressions processed or a percent of ad spend. In addition, we may receive certain fixed monthly fees for the use of our platform or products. We recognize revenue upon the fulfillment of our contractual obligations in connection with a completed transaction, subject to satisfying all other revenue recognition criteria. For the majority of transactions executed through our platform, we act as an agent on behalf of the publisher that is monetizing its inventory, and revenue is recognized net of any advertising inventory costs that we remit to sellers. With respect to certain revenue streams for managed advertising campaigns that are transacted through insertion orders, we report revenue on a gross basis, based primarily on our determination that the Company acts as the primary obligor in the delivery of advertising campaigns for our buyer clients with respect to such transactions.

For the three months ended March 31, 2022, our revenue reported on a gross basis was 15% of total revenue, and for the three months ended March 31, 2023, our revenue reported on a gross basis was 17% of total revenue. Any mix shift that causes an increase in the relative percentage of our revenue accounted for on a gross basis would result in a higher revenue contribution and an associated decrease in our gross margin percentage (with no underlying impact on gross profit or Revenue ex-TAC, as defined in section "Key Operating and Financial Performance Metrics"). Our revenue recognition policies are discussed in more detail in our audited consolidated financial statements and notes thereto for the year ended December 31, 2022 included in our Annual Report on Form 10-K and in Note 3 of the accompanying Notes to the Condensed Consolidated Financial Statements.

Expenses

We classify our expenses into the following categories:

Cost of Revenue. Our cost of revenue consists primarily of cloud hosting, data center, and bandwidth costs, ad protection costs, depreciation and maintenance expense of hardware supporting our revenue-producing platform, amortization of software costs for the development of our revenue-producing platform, amortization expense associated with acquired developed technologies, personnel costs, and facilities-related costs. In addition, for revenue booked on a gross basis, cost of revenue includes traffic acquisition costs. Personnel costs included in cost of revenue include salaries, bonuses, and stock-based compensation, and are primarily attributable to personnel in our network operations group who support our platform. We capitalize costs associated with software that is developed or obtained for internal use and amortize the costs associated with our revenue-producing platform in cost of revenue over their estimated useful lives. We amortize acquired developed technologies over their estimated useful lives.

Sales and Marketing. Our sales and marketing expenses consist primarily of personnel costs, including salaries, bonuses, and stock-based compensation, as well as marketing expenses such as brand marketing, travel expenses, trade shows and marketing materials, professional services, and amortization expense associated with client relationships, backlog, and non-compete agreements from our business acquisitions, and to a lesser extent, facilities-related costs and depreciation and amortization. Our sales organization focuses on increasing the adoption of our solution by existing and new buyers and sellers. We amortize acquired intangibles associated with client relationships and backlog from our business acquisitions over their estimated useful lives.

Technology and Development. Our technology and development expenses consist primarily of personnel costs, including salaries, bonuses, and stock-based compensation, as well as outsourced resources associated with the ongoing development and maintenance of our solution, depreciation and amortization, and to a lesser extent, facilities-related costs. These expenses include costs incurred in the development, implementation, and maintenance of internal use software, including platform and related infrastructure. Technology and development costs are expensed as incurred, except to the extent that such costs are associated with internal use software development that qualifies for capitalization, which are then recorded as internal use software development costs, net, on our consolidated balance sheets. We amortize internal use software development costs that relate to our revenue-producing activities on our platform to cost of revenue and amortize other internal use software development costs to technology and development costs or general and administrative expenses, depending on the nature of the related project. We amortize acquired intangibles associated with technology and development functions from our business acquisitions over their estimated useful lives.

General and Administrative. Our general and administrative expenses consist primarily of personnel costs, including salaries, bonuses, and stock-based compensation, associated with our executive, finance, legal, human resources, compliance, and other administrative personnel, as well as accounting and legal professional services fees, facilities-related costs and depreciation and amortization, and other corporate-related expenses. General and administrative expenses also include amortization of internal

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use software development costs and acquired intangible assets from our business acquisitions over their estimated useful lives that relate to general and administrative functions.

Merger, Acquisition, and Restructuring Costs. Our merger, acquisition, and restructuring costs consist primarily of professional service fees associated with the merger and acquisition activities, cash-based employee termination costs, related stock-based compensation charges, and other restructuring activities, including facility closures, relocation costs, contract termination costs, and impairment costs of abandoned technology associated with restructuring activities.

Other (Income) Expense

Interest (Income) Expense, Net. Interest expense consists of interest expense associated with our Term Loan B Facility (defined below) and Convertible Senior Notes (defined below), and their related amortization of debt issuance costs and debt discount. Interest income consists of interest earned on our cash equivalents.

Other Income. Other income consists primarily of rental income from commercial office space we hold under lease and have sublet to other tenants.

Foreign Currency Exchange (Gain) Loss, Net. Foreign currency exchange (gain) loss, net consists primarily of gains and losses on foreign currency transactions and remeasurement of monetary assets and liabilities on our balance sheet denominated in foreign currencies. Foreign currency monetary assets and liabilities consist primarily of cash and cash equivalents, accounts receivable, accounts payable, and various intercompany balances held between our subsidiaries. Our primary foreign currency exposures are currencies other than the U.S. Dollar, principally the Australian Dollar, British Pound, Canadian Dollar, Euro, and Japanese Yen.

Gain on Extinguishment of Debt. Gain on extinguishment of debt consists of gains or losses associated with the repurchases of Convertible Senior Notes at a discount or premium, respectively, including unamortized issuance costs, accrued interest expense, and commissions associated with the extinguished debt.

Provision (Benefit) for Income Taxes

We are subject to income taxes in the U.S. (federal and state) and numerous foreign jurisdictions. Tax laws, regulations, administrative practices, principles, and interpretations in various jurisdictions may be subject to significant change, with or without notice, due to economic, political, and other conditions, and significant judgment is required in evaluating and estimating our provision and accruals for these taxes. There are many transactions that occur during the ordinary course of business for which the ultimate tax determination is uncertain. Our effective tax rates could be affected by numerous factors, such as changes in our business operations, acquisitions, investments, entry into new businesses and geographies, intercompany transactions, the relative amount of our foreign earnings, including earnings being lower than anticipated in jurisdictions where we have lower statutory rates and higher than anticipated in jurisdictions where we have higher statutory rates, losses incurred in jurisdictions for which we are not able to realize related tax benefits, the applicability of special tax regimes, changes in foreign currency exchange rates, changes in our stock price, changes in our deferred tax assets ("DTAs") and liabilities and their valuation, changes in the laws, regulations, administrative practices, principles, and interpretations related to tax, including changes to the global tax framework, competition, and other laws and accounting rules in various jurisdictions.

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Results of Operations

    The following table sets forth our condensed consolidated results of operations:

	Three Months Ended				Change %
	March 31, 2023		March 31, 2022
	(in thousands)
Revenue	$	130,150	$	118,075	10	%
Expenses (1)(2):
Cost of revenue	124,828		59,396		110	%
Sales and marketing	53,049		50,000		6	%
Technology and development	24,215		23,043		5	%
General and administrative	21,088		18,704		13	%
Merger, acquisition, and restructuring costs	7,465		6,756		10	%
Total expenses	230,645		157,899		46	%
Loss from operations	(100,495)		(39,824)		(152)	%
Other (income) expense, net	(1,454)		6,774		NM
Loss before income taxes	(99,041)		(46,598)		(113)	%
Benefit for income taxes	(309)		(2,005)		(85)	%
Net loss	$	(98,732)	$	(44,593)	(121)	%

NM Not meaningful
(1) Stock-based compensation expense included in our expenses was as follows:
	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Cost of revenue	$	468	$	350
Sales and marketing	7,405		5,341
Technology and development	5,446		4,717
General and administrative	5,825		4,237
Merger, acquisition, and restructuring costs	143		1,944
Total stock-based compensation expense	$	19,287	$	16,589

(2) Depreciation and amortization expense included in our expenses was as follows:
	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Cost of revenue	$	80,391	$	26,322
Sales and marketing	15,044		19,152
Technology and development	205		224
General and administrative	155		168
Total depreciation and amortization expense	$	95,795	$	45,866

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    The following table sets forth our condensed consolidated results of operations for the specified periods as a percentage of our revenue for those periods presented:

	Three Months Ended
	March 31, 2023		March 31, 2022
Revenue	100	%	100	%
Cost of revenue	96		50
Sales and marketing	41		42
Technology and development	19		20
General and administrative	16		16
Merger, acquisition, and restructuring costs	6		6
Total expenses	177		134
Loss from operations	(77)		(34)
Other (income) expense, net	(1)		6
Loss before income taxes	(76)		(40)
Benefit for income taxes	—		(2)
Net loss	(76)	%	(38)	%
Note: Percentages may not sum due to rounding.

Comparison of the Three Months Ended March 31, 2023 and 2022

    Revenue

Revenue increased $12.1 million, or 10%, for the three months ended March 31, 2023 compared to the three months ended March 31, 2022. Our revenue growth was driven primarily by growth in mobile, which increased by $9.2 million, or 23%, and CTV, which increased by $7.6 million, or 15%. These increases were partially offset by a decline in revenue from desktop of $4.7 million, or 17%.

Our revenue is largely a function of the number of advertising transactions and the price, or CPM, at which the inventory is sold, which results in total advertising spend on our platform, and, with respect to our revenue reported on a net basis, the take rate we charge for our services. Because pricing and take rate vary across publisher, channel and transaction type, our revenue is impacted by shifts in the mix of advertising spend on our platform. We believe that contributions to revenue from reserve auctions, in particular with respect to CTV, which is largely transacted on a reserved basis, will continue to grow as a percentage of our total revenue. In general, we expect this shift will have a positive impact on our revenue due to both an increase in the volume of transactions and average CPM, despite the fact that reserve auctions generally carry a lower take rate compared to open auction transactions.

Our business is dependent in part on the overall health of the advertising market. Our revenue growth has been tempered, and may be negatively impacted in the future, by reductions in revenue resulting from the impact of macroeconomic challenges. If economic conditions were to deteriorate further, we would likely experience a negative impact on our future revenue trends, and the magnitude of this impact is difficult to predict depending on the scope and duration of any recession. Refer to Item 1A. "Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2022 for additional information related to these risks and the impact they may have on our business.

Cost of Revenue

Cost of revenue increased $65.4 million, or 110%, for the three months ended March 31, 2023 compared to the three months ended March 31, 2022, primarily due to an increase of $54.1 million in depreciation and amortization. This increase was driven by incremental amortization of $53.2 million due to the acceleration of the remaining lives of certain acquired intangible assets and capitalized software during the fourth quarter of 2022 from the integration of our legacy CTV platforms into Magnite Streaming. Costs of revenue also included increases of $8.5 million in cloud hosting, data center, and bandwidth expenses.

We expect our cost of revenue to continue to increase through the third quarter of 2023 compared to 2022 in absolute dollars primarily due to the accelerated amortization expense as discussed above, which is expected to result in approximately $61.1 million of net incremental non-cash expense through the third quarter of 2023 as compared to the original timing of its amortization. Cost of revenue in the fourth quarter of 2023 is expected to decline compared to the fourth quarter of 2022 in absolute dollars, due to the completion of the accelerated amortization expense.

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Cost of revenue may fluctuate from quarter to quarter and period to period, on an absolute dollar basis and as a percentage of revenue, depending on revenue levels and the volume of transactions we process supporting those revenues, and the timing and amounts of depreciation and amortization of equipment and software.

    Sales and Marketing

Sales and marketing expenses increased $3.0 million, or 6%, for the three months ended March 31, 2023 compared to the three months ended March 31, 2022 primarily due to increases of $5.1 million related to personnel expenses and $0.9 million related to professional services expenses. These increases were partially offset by a decrease of $4.1 million related to depreciation and amortization primarily due to certain acquired intangible assets becoming fully amortized in 2022.

Sales and marketing expenses may fluctuate quarter to quarter and period to period, on an absolute dollar basis and as a percentage of revenue, based on revenue levels, the timing of our investments and seasonality in our industry and business.

    Technology and Development

Technology and development expenses increased $1.2 million, or 5%, for the three months ended March 31, 2023 compared to the three months ended March 31, 2022.

The timing and amount of our capitalized development and enhancement projects may affect the amount of development costs expensed in any given period. As a percentage of revenue, technology and development expense may fluctuate from quarter to quarter and period to period based on revenue levels, the timing and amounts of technology and development efforts, the timing and the rate of the amortization of capitalized projects and the timing and amounts of future capitalized internal use software development costs.

General and Administrative

General and administrative expenses increased $2.4 million, or 13%, for the three months ended March 31, 2023 compared to the three months ended March 31, 2022, primarily due to increases of $1.9 million in personnel expenses.

General and administrative expenses may fluctuate from quarter to quarter and period to period based on the timing and amounts of expenditures in our general and administrative functions as they vary in scope and scale over periods. Such fluctuations may not be directly proportional to changes in revenue.

Merger, Acquisition, and Restructuring Costs

Merger, acquisition, and restructuring costs increased $0.7 million, or 10%, for the three months ended March 31, 2023 compared to the three months ended March 31, 2022. Costs incurred during the three months ended March 31, 2023 were due to restructuring activities as a result of consolidating our legacy CTV and SpotX CTV platforms following the SpotX Acquisition, which primarily included $3.4 million of severance related expenses, $2.2 million of facilities related loss contracts, and $1.4 million of exit costs. Costs incurred during the three months ended March 31, 2022 of $6.8 million were primarily due to restructuring activities from the SpotX Acquisition, which included $3.3 million of impairment costs associated with abandoned technology and $1.9 million non-cash stock-based compensation expense associated with the acceleration of unvested equity awards.

Other (Income) Expense, Net

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Interest expense, net	$	8,175	$	7,111
Other income	(1,313)		(1,263)
Foreign exchange loss, net	233		926
Gain on debt extinguishment	(8,549)		—
Total other (income) expense, net	$	(1,454)	$	6,774

Interest expense, net increased $1.1 million during the three months ended March 31, 2023 compared to the three months ended March 31, 2022 primarily due to increases of interest expense of $3.2 million as a result of increased interest rates on our Term Loan B Facility, partially offset by increases of interest income of $2.2 million generated from cash equivalents and short term investments.

Foreign exchange loss, net is impacted by movements in exchange rates and the amount of foreign currency-denominated cash, receivables, and payables, which are impacted by our billings to buyers, payments to sellers, and intercompany balances. The

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foreign exchange loss, net during the three months ended March 31, 2023 was primarily due to the currency movements between the British Pound, Australian Dollar, Canadian Dollar, and Euro relative to the U.S. Dollar.

During the three months ended March 31, 2023, we repurchased a portion of our Convertible Senior Notes and as a result, we recorded a gain on early extinguishment of debt of $8.5 million, representing the difference between the purchase price of $40.8 million and the net carrying amount of the debt extinguished of $49.4 million, which included a principal balance of $50.3 million and $0.9 million of unamortized debt issuance costs.

Provision (Benefit) for Income Taxes    

    We recorded an income tax benefit of $0.3 million and $2.0 million for the three months ended March 31, 2023 and 2022, respectively. The tax benefit for the three months ended March 31, 2023 and March 31, 2022 was primarily the result of recognizing the benefit of DTAs previously subject to the domestic valuation allowance and the foreign income tax provision. We continue to maintain a partial valuation allowance for our domestic DTAs.

Key Operating and Financial Performance Metrics

In addition to our GAAP results, we review non-GAAP financial measures, including Revenue ex-TAC and Adjusted EBITDA, to help us evaluate our business on a consistent basis, measure our performance, identify trends affecting our business, establish budgets, measure the effectiveness of investments in our technology and development and sales and marketing, and assess our operational efficiencies. Our non-GAAP financial measures are discussed below. Revenue and net income (loss) are discussed above under the headings "Components of Our Results of Operations" and "Results of Operations."

	Three Months Ended
	March 31, 2023		March 31, 2022		Change Favorable/ (Unfavorable)
	(in thousands)
Financial Measures and non-GAAP Financial Measures:
Revenue	$	130,150	$	118,075	10%
Revenue ex-TAC	116,049		107,084		8%
Gross profit	5,322		58,679		(91)%
Net loss	(98,732)		(44,593)		(121)%
Adjusted EBITDA	23,338		28,841		(19)%

Revenue ex-TAC

Revenue ex-TAC is revenue excluding traffic acquisition cost ("TAC"). Traffic acquisition cost, a component of cost of revenue, represents what we must pay sellers for the sale of advertising inventory through our platform for revenue reported on a gross basis. In calculating Revenue ex-TAC, we add back the cost of revenue, excluding TAC, to gross profit, the most comparable GAAP measurement. Revenue ex-TAC is a non-GAAP financial measure. Our management believes Revenue ex-TAC is a useful measure in assessing the performance of Magnite as a combined company following the SpotX Acquisition and facilitates a consistent comparison against our core business without considering the impact of traffic acquisition costs related to revenue reported on a gross basis.

Our use of Revenue ex-TAC has limitations as an analytical tool and you should not consider it in isolation or as a substitute for analysis of our financial results as reported under GAAP. A potential limitation of this non-GAAP financial measure is that other companies, including companies in our industry which have similar business arrangements, may define Revenue ex-TAC differently, which may make comparisons difficult. Because of these and other limitations, you should consider our non-GAAP measures only as supplemental to GAAP-based financial performance measures, including revenue, net income (loss) and cash flows.

The following table presents the calculation of gross profit and reconciliation of gross profit to Revenue ex-TAC for the three months ended March 31, 2023 and 2022:

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	Three Months Ended
	March 31, 2023		March 31, 2022		Change %
	(in thousands)
Revenue	$	130,150	$	118,075	10	%
Less: Cost of revenue	124,828		59,396		110	%
Gross Profit	5,322		58,679		(91)	%
Add back: Cost of revenue, excluding TAC	110,727		48,405		129	%
Revenue ex-TAC	$	116,049	$	107,084	8	%

We track the breakdown of Revenue ex-TAC across channels to better understand how our clients are transacting on our platform, which informs decisions as to business strategy and the allocation of resources and capital. The following table presents Revenue ex-TAC by channel:

	Revenue ex-TAC
	Three Months Ended
	March 31, 2023		March 31, 2022		Change %
	(in thousands)
Channel:
CTV	$	46,412	$	42,303	10	%
Mobile	46,897		38,297		22	%
Desktop	22,740		26,484		(14)	%
Total	$	116,049	$	107,084	8	%

Revenue ex-TAC increased $9.0 million, or 8%, for the three months ended March 31, 2023 compared to the three months ended March 31, 2022. The increase in Revenue ex-TAC was primarily due to growth in mobile and CTV. This was partially offset by a decline in our desktop business.

Adjusted EBITDA

We define Adjusted EBITDA as net income (loss) adjusted to exclude stock-based compensation expense, depreciation and amortization, amortization of acquired intangible assets, impairment charges, interest income or expense, and other cash and non-cash based income or expenses that we do not consider indicative of our core operating performance, including, but not limited to foreign exchange gains and losses, acquisition and related items, gains or losses on extinguishment of debt, non-operational real estate and other expense (income), net, and provision (benefit) for income taxes. We believe Adjusted EBITDA is useful to investors in evaluating our performance for the following reasons:

•Adjusted EBITDA is widely used by investors and securities analysts to measure a company’s performance without regard to items such as those we exclude in calculating this measure, which can vary substantially from company to company depending upon their financing, capital structures, and the method by which assets were acquired.

•Our management uses Adjusted EBITDA in conjunction with GAAP financial measures for planning purposes, including the preparation of our annual operating budget, as a measure of performance and the effectiveness of our business strategies, and in communications with our board of directors concerning our performance. Adjusted EBITDA may also be used as a metric for determining payment of cash incentive compensation.

•Adjusted EBITDA provides a measure of consistency and comparability with our past performance that many investors find useful, facilitates period-to-period comparisons of operations, and also facilitates comparisons with other peer companies, many of which use similar non-GAAP financial measures to supplement their GAAP results.

Although Adjusted EBITDA is frequently used by investors and securities analysts in their evaluations of companies, Adjusted EBITDA has limitations as an analytical tool, and should not be considered in isolation or as a substitute for analysis of our results of operations as reported under GAAP. These limitations include:

•Stock-based compensation is a non-cash charge and will remain an element of our long-term incentive compensation package, although we exclude it as an expense when evaluating our ongoing operating performance for a particular period.

•Depreciation and amortization are non-cash charges, and the assets being depreciated or amortized will often have to be replaced in the future, but Adjusted EBITDA does not reflect any cash requirements for these replacements.

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•Impairment charges are non-cash charges related to goodwill, intangible assets and/or long-lived assets.

•Adjusted EBITDA does not reflect non-cash charges related to acquisition and related items, such as amortization of acquired intangible assets, merger, acquisition, or restructuring related severance costs, and changes in the fair value of contingent consideration.

•Adjusted EBITDA does not reflect cash and non-cash charges and changes in, or cash requirements for, acquisition and related items, such as certain transaction expenses and expenses associated with earn-out amounts.

•Adjusted EBITDA does not reflect changes in our working capital needs, capital expenditures, non-operational real estate expenses or income, or contractual commitments.

•Adjusted EBITDA does not reflect cash requirements for income taxes and the cash impact of other income or expense.

•Other companies may calculate Adjusted EBITDA differently than we do, limiting its usefulness as a comparative measure.

Our Adjusted EBITDA is influenced by fluctuations in our revenue, cost of revenue, and the timing and amounts of the cost of our operations. Adjusted EBITDA should not be considered as an alternative to net income (loss), income (loss) from operations, or any other measure of financial performance calculated and presented in accordance with GAAP.

The following table presents a reconciliation of net loss, the most comparable GAAP measure, to Adjusted EBITDA for the three months ended March 31, 2023 and 2022 (in thousands):

	Three Months Ended
	March 31, 2023		March 31, 2022
Net loss	$	(98,732)	$	(44,593)
Add back (deduct):
Depreciation and amortization expense, excluding amortization of acquired intangible assets	9,366		7,390
Amortization of acquired intangibles	86,429		38,476
Stock-based compensation expense	19,287		16,589
Merger, acquisition, and restructuring costs, excluding stock-based compensation expense	7,322		4,812
Non-operational real estate and other expense, net	116		135
Interest expense, net	8,175		7,111
Foreign exchange loss, net	233		926
Gain on extinguishment of debt	(8,549)		—
Benefit for income taxes	(309)		(2,005)
Adjusted EBITDA	$	23,338	$	28,841

Adjusted EBITDA decreased by $5.5 million during the three months ended March 31, 2023 compared to the three months ended March 31, 2022, primarily due to increases in cloud hosting, data center, and bandwidth costs and increases in personnel expenses, which are discussed in section "Comparison of the Three Months Ended March 31, 2023 and 2022."

Liquidity and Capital Resources

Liquidity

As of March 31, 2023, we had cash and cash equivalents of $236.6 million, of which $41.6 million was held in foreign currency denominated cash accounts, and an aggregate gross principal amount of $703.5 million of indebtedness outstanding under our Term Loan B Facility (as defined below) and our Convertible Senior Notes (as defined below). In addition, we are party to a $65.0 million Revolving Credit Facility (as defined below), of which approximately $5.3 million is assigned to outstanding but undrawn letters of credit. See "Capital Resources" below for further information about our outstanding debt.

Our principal cash requirements for the twelve-month period following this report primarily consist of personnel costs, contractual payment obligations, including office leases, data center costs and cloud hosting costs, capital expenditures, payment of interest and required principal payments on our Convertible Senior Notes and Term Loan B Facility, cash outlays for income taxes, and cash requirements to fund working capital. In the longer term, we would expect to have similar cash requirements, with increases in absolute dollars associated with the continued growth of our business and expansion of operations. See "Contractual Obligations and Known Future Cash Requirements" for a further discussion of our known material contractual obligations.

Our working capital needs and cash conversion cycle, which is influenced by seasonality and may be negatively impacted as a result of pandemics, inflationary, recessionary and other macroeconomic challenges, can have large fluctuations due to the

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timing of receipts from buyers and timing of disbursements to sellers. In addition, in the event a buyer defaults on payment, we may still be required to pay sellers for the inventory purchased. Our capital expenditure investments tend to be higher in the second half of the year. The impacts from changes in working capital and capital expenditures can significantly impact our cash flows and therefore, our liquidity during any period presented.

We have historically relied upon cash and cash equivalents, cash generated from operations, borrowings under credit facilities and issuance of debt for our liquidity needs. Our ability to meet our cash requirements depends on, among other things, our operating performance, competitive developments, and financial market conditions, all of which are significantly affected by business, financial, economic, political, global health-related and other factors, many of which we may not be able to control or influence.

We believe our existing cash and cash equivalents, cash generated from operating activities, and amounts available to borrow under our Revolving Credit Facility will be sufficient to meet our working capital requirements for at least the next twelve months from the issuance of our financial statements. However, there are multiple factors that could impact our cash balances in the future, including the factors described above with respect to working capital and cash conversion cycles, as well as the duration and severity of events beyond our control and macroeconomic factors like labor shortages, supply chain disruptions, and inflation impacting the markets and communities in which our clients operate and the factors set forth in Part I, Item 1A: "Risk Factors" of our Annual Report on Form 10-K for the year ended December 31, 2022.

Capital Resources

In March 2021, we sold convertible senior notes ("Convertible Senior Notes") for gross proceeds of $400.0 million. The Convertible Senior Notes are senior, unsecured obligations with interest payable semi-annually in cash at a rate of 0.25% per annum in arrears on March 15 and September 15. The Convertible Senior Notes will mature on March 15, 2026, unless earlier converted, redeemed, or repurchased. The initial conversion rate is 15.6539 shares per $1,000 principal amount of notes, which represents an initial conversion price of approximately $63.88 per share of the Company’s common stock and is subject to adjustment as described in the Offering Memorandum. At March 31, 2023, the balance of the Convertible Senior Notes was $343.8 million, net of unamortized debt issuance costs of $5.9 million. Accrued interest for the Convertible Senior Notes at March 31, 2023 was immaterial.

In conjunction with the issuance of the Convertible Senior Notes, we entered into capped call transactions to reduce the Company's exposure to additional cash payments above principal balances in the event of a cash conversion of the Convertible Senior Notes. The Company may owe additional cash or shares to the holders of the Convertible Senior Notes upon early conversion if our stock price exceeds $91.260 per share, which is subject to certain adjustments. Although the Company’s incremental exposure to the additional cash payment above the principal amount of the Convertible Senior Notes is reduced by the capped calls, conversion of the Convertible Senior Notes by the holders may cause dilution to the ownership interests of existing stockholders. See Note 13 "Debt" in the notes to unaudited condensed consolidated financial statements included in this Quarterly Report for more information regarding terms and conditions of the Convertible Senior Notes and the capped call transactions.

On April 30, 2021, and in conjunction with the SpotX Acquisition, we entered into a credit agreement (the "Credit Agreement") with Goldman Sachs Bank USA as administrative and collateral agent, and other lending parties thereto for a $360.0 million seven-year senior secured term loan facility ("Term Loan B Facility") and a $52.5 million senior secured revolving credit facility (the "Revolving Credit Facility"), which was subsequently increased to $65.0 million in June 2021. Amounts outstanding under the Credit Agreement accrue interest at a rate equal to either, (1) for the Term Loan B Facility, at the Company’s election, the Eurodollar Rate (as defined in the Credit Agreement) plus a margin of 5.00% per annum, or ABR (as defined in the Credit Agreement) plus a margin of 4.00%, and (2) for the Revolving Credit Facility, at the Company’s election, the Eurodollar Rate plus a margin of 4.25% to 4.75%, or ABR plus a margin of 3.25% to 3.75%, in each case, depending on the Company’s first lien net leverage ratio. As part of the Term Loan B Facility, the Company received $325 million in proceeds, net of discounts and fees, which were used to finance the SpotX Acquisition and related transactions and for general corporate purposes. At March 31, 2023, amounts available under the Revolving Credit Facility were $59.7 million, net of letters of credit outstanding in the amount of $5.3 million. Accrued interest for the Term Loan B Facility at March 31, 2023 was $0.8 million.

In February 2023, our Board of Directors approved a repurchase plan (the “2023 Repurchase Plan”), pursuant to which the Company is authorized to purchase up to an aggregate of $75.0 million of common stock or Convertible Senior Notes through February 16, 2025. The repurchase program allows the Company to repurchase its common stock or Convertible Senior Notes using open market stock purchases, privately negotiated transactions, block trades or other means in accordance with U.S. securities laws. Approximately $34.2 million remained available for purchases under this repurchase program as of March 31, 2023.

In the future, we may attempt to raise additional capital through the sale of equity securities or through equity-linked or debt financing arrangements. If we raise additional funds by issuing equity or equity-linked securities, the ownership of our existing stockholders may be diluted. If we raise additional financing by incurring indebtedness, we will be subject to increased fixed payment obligations and could also be subject to restrictive covenants, such as limitations on our ability to incur additional debt, and other operating restrictions that could adversely impact our ability to conduct our business. Any future indebtedness we incur may result in terms that could be unfavorable to equity investors.

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An inability to raise additional capital could adversely affect our ability to achieve our business objectives. In addition, if our operating performance during the next twelve months is below our expectations, our liquidity and ability to operate our business could be adversely affected.

Our cash and cash equivalents balance is affected by our results of operations, the timing of capital expenditures which are typically greater in the second half of the year, and by changes in our working capital, particularly changes in accounts receivable and accounts payable. The timing of cash receipts from buyers and payments to sellers can significantly impact our cash flows from operating activities and our liquidity for, and within, any period presented. Our collection and payment cycle can vary from period to period depending upon various circumstances, including seasonality, and may be negatively impacted by certain macroeconomic challenges, such as capital market disruptions and instability of financial institutions.         

    Cash Flows

The following table summarizes our cash flows for the periods presented:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Cash flows (used in) provided by operating activities	$	(30,893)	$	21,632
Cash flows used in investing activities	(7,467)		(31,321)
Cash flows used in financing activities	(51,809)		(16,388)
Effects of exchange rate changes on cash, cash equivalents and restricted cash	265		268
Change in cash, cash equivalents and restricted cash	$	(89,904)	$	(25,809)

    Operating Activities

Our cash flows from operating activities are primarily driven by revenue from transactions of advertising on our platform, offset by the cash costs of operations, and are significantly influenced by the timing of and fluctuations in receipts from buyers and related payments to sellers. Our future cash flows will be diminished if we cannot increase our revenue levels and manage costs appropriately.

For the three months ended March 31, 2023, net cash used in operating activities was $30.9 million compared to net cash provided by operating activities of $21.6 million for the three months ended March 31, 2022. Our operating activities included our net loss of $98.7 million and $44.6 million for the three months ended March 31, 2023 and 2022, respectively, which were offset by non-cash adjustments of $109.1 million and $66.1 million, respectively. Net changes in our working capital resulted in $41.3 million of cash used in operating activities and $0.1 million of cash provided by operating activities for the three months ended March 31, 2023 and March 31, 2022, respectively. The net changes in working capital for both periods are primarily due to the timing of cash receipts from buyers and the timing of payments to sellers.

We believe that cash flows from operations will continue to fluctuate, but in general will increase over time as our business continues to grow.

    Investing Activities

Our primary investing activities have consisted of acquisitions of businesses, purchases of property and equipment, capital expenditures in support of creating and enhancing our technology infrastructure, and investments in, and maturities of, available-for-sale securities. Purchases of property and equipment and investments in internal use software development may vary from period-to-period due to the timing of the expansion of our operations, changes to headcount, and the cycles of our internal use software development. We anticipate investment in internal use software development and purchases of property and equipment to decrease in 2023 compared to 2022. Historically, a majority of our purchases in property and equipment have occurred in the latter half of the year in preparation for the peak volumes of the fourth quarter and early in the first quarter of the following year; however, in 2023, we expect these investments to occur more evenly throughout the year.

During the three months ended March 31, 2023 and 2022, our investing activities used net cash of $7.5 million and $31.3 million, respectively. During the three months ended March 31, 2023 and 2022, we used cash for purchases of property and equipment of $4.4 million and $7.2 million, respectively, and used cash for investments in our internally developed software of $3.1 million and $3.4 million, respectively. The three months ended March 31, 2022 included net cash used of $20.8 million to acquire Carbon.

We believe that cash flows used in our investing activities will generally increase in order to support our overall growth, in particular with respect to investments in property and equipment and internally developed software. In addition, our cash flows from investing activities may fluctuate depending on future acquisition activity.

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    Financing Activities

Our financing activities consisted of our Convertible Senior Notes transactions, repayment of amounts borrowed under our Term Loan B Facility, transactions related to our equity plans, and stock and convertible note purchases under the repurchase plans.

For the three months ended March 31, 2023 and 2022, net cash used by financing activities was $51.8 million and $16.4 million, respectively. Cash outflows from financing activities for the three months ended March 31, 2023 primarily included a $40.8 million payment related to repurchases of our Convertible Senior Notes, $9.0 million for taxes paid related to net share settlement of stock-based awards, a $2.3 million payment of our indemnification claims holdback, and a $0.9 million repayment of our Term Loan B. The outflows were partially offset by cash proceeds from stock options exercised of $1.5 million.

Cash outflows from financing activities for the three months ended March 31, 2022 primarily included a $12.1 million payment related to share repurchases, $4.3 million for taxes paid related to net share settlement of stock-based awards, and a $0.9 million repayment of our Term Loan B. The outflows were offset by cash proceeds from stock options exercised of $1.1 million.

Off-Balance Sheet Arrangements

We do not have any relationships with other entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities that have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. We did not have any other off-balance sheet arrangements at March 31, 2023 other than the short-term operating leases and the indemnification agreements described below, and commitments mentioned in Note 12 - "Commitments Contingencies."

Contractual Obligations and Known Future Cash Requirements

As of March 31, 2023, our principal commitments consist of obligations under our Convertible Senior Notes, Term Loan B Facility, Revolving Credit Facility, leases for our various office facilities, including our corporate headquarters in New York, New York and office in Los Angeles, California, operating lease agreements, including data centers, and cloud hosting services that expire at various times through 2033. In certain cases, the terms of the lease agreements provide for rental payments on a graduated basis.

The following table summarizes our future lease obligations, payments of principal and interest under our debt agreements, sublease income, and other future payments due under non-cancelable agreements at March 31, 2023 (in thousands):

	Remaining 2023		2024		2025		2026		2027		Thereafter		Total
Lease liabilities associated with leases included Right of Use Asset as of March 31, 2023	$	19,311	$	22,299	$	14,487	$	12,020	$	7,431	$	21,011	$	96,559
Obligations for leases not included in Lease liabilities as of March 31, 2023	174		231		231		231		231		1,176		2,274
Convertible Senior Notes	—		—		—		349,750		—		—		349,750
Interest, Convertible Senior Notes	437		874		874		434		—		—		2,619
Term Loan B (1)	2,700		3,600		3,600		3,600		3,600		336,600		353,700
Interest, Term Loan B (2)	27,529		35,222		34,764		34,402		34,040		11,203		177,160
Operating sublease income	(3,676)		(4,767)		(1,751)		(260)		—		—		(10,454)
Other non-cancelable obligations	3,058		6,953		2,091		—		—		—		12,102
Total	$	49,533	$	64,412	$	54,296	$	400,177	$	45,302	$	369,990	$	983,710
(1) Includes only scheduled amortization of payments and excludes currently unknown prepayment amounts that may be required, per terms of the Credit Agreement, after the end of each fiscal year.
(2) Interest payments are based on an assumed rate of 9.91%, which was the rate as of March 31, 2023 for the associated Term Loan B Facility.

Obligations for leases not included in the lease liabilities as of March 31, 2023 include commitments under agreements for office space and data centers that have not commenced as of March 31, 2023.

Payments associated with our Convertible Senior Notes are based on contractual terms and intended timing of repayments of long-term debt and associated interest and do not assume conversion prior to the maturity date.

Other non-cancelable obligations include agreements in the normal course of business and purchase consideration that extend beyond a year as of March 31, 2023. Other non-cancelable obligations above excludes a variable commitment from an agreement for cloud-managed services. The variable commitment begins in July 2023 and ends in June 2025. The future obligation under this agreement will be based on actual spend, as defined in the agreement, with the service provider from July 2022 through

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June 2023. We estimate the future minimum annual obligation to be approximately $55 million to $60 million in each twelve-month period (i.e. July 2023 to June 2024 and July 2024 to June 2025).

In the ordinary course of business, we enter into agreements with sellers, buyers, and other third parties pursuant to which we agree to indemnify buyers, sellers, vendors, lessors, business partners, lenders, stockholders, and other parties with respect to certain matters, including, but not limited to, losses resulting from claims of intellectual property infringement, damages to property or persons, business losses, or other liabilities. Generally, these indemnity and defense obligations relate to our own business operations, obligations, and acts or omissions. However, under some circumstances, we agree to indemnify and defend contract counterparties against losses resulting from their own business operations, obligations, and acts or omissions, or the business operations, obligations, and acts or omissions of third parties. These indemnity provisions generally survive termination or expiration of the agreements in which they appear. In addition, we have entered into indemnification agreements with our directors, executive officers and certain other officers that will require us, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers, or employees. No demands for indemnification have been made as of March 31, 2023.

Critical Accounting Policies and Estimates

Our condensed consolidated financial statements are prepared in accordance with GAAP. The preparation of these condensed consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, expenses, and related disclosures. We evaluate our estimates and assumptions on an ongoing basis. Our estimates are based on historical experience and various other assumptions that we believe to be reasonable under the circumstances. Our actual results could differ from these estimates.

We believe that the following assumptions and estimates have the greatest potential impact on our condensed consolidated financial statements: (i) the determination of revenue recognition as net versus gross in our revenue arrangements, (ii) the determination of amounts to capitalize and the estimated useful lives of internal-use software development costs, (iii) the recoverability of intangible assets and goodwill and the determination of the estimated useful lives of intangible assets, (iv) assumptions used in the valuation models to determine the fair value of stock options, awards with market and performance conditions, and stock-based compensation expense, (v) the assumptions used in the valuation of acquired assets and liabilities in business combinations, and (vi) income taxes, including the realization of tax assets and estimates of tax liabilities. Besides the adoption of new accounting pronouncements, as included within "Note 1—Organization and Summary of Significant Accounting Policies" to the condensed consolidated financial statements in this report, there have been no significant changes in our accounting policies or estimates from those disclosed in our audited consolidated financial statements and notes thereto for the year ended December 31, 2022 included in our Annual Report on Form 10-K.

Recently Issued Accounting Pronouncements

For information regarding recent accounting pronouncements, refer to Note 1 "Organization and Summary of Significant Accounting Policies" to our condensed consolidated financial statements included in this Quarterly Report on Form 10-Q.

Item 3. Quantitative and Qualitative Disclosure About Market Risk

We have operations both in the United States and internationally, and we are exposed to market risks in the ordinary course of our business. These risks include primarily interest rate, foreign exchange, and inflation risks. The risks below may be further exacerbated by the effects of certain global macroeconomic challenges and market conditions.

Interest Rate Fluctuation Risk

Our cash and cash equivalents consist of cash and money market funds, but may from time to time also include commercial paper, with original maturities of three months or less. Our investments may consist of repurchase agreements, U.S. government agency debt, and U.S. treasury debt. The primary objective of our investment activities is to preserve the value of our cash without significantly increasing risk. Because our cash, cash equivalents, and investments have a short maturity, our portfolio’s fair value is relatively insensitive to interest rate changes, however, interest income earned will vary as interest rates change.

We do not have economic interest rate expense exposure on our Convertible Senior Notes due to their fixed interest rate nature. The amount paid upon redemption is not based on changes in any index or changing market rates. It is fixed at 100% of the principal amount of the Convertible Senior Notes plus unpaid interest. Since the Convertible Senior Notes bear fixed rate coupon, we are not exposed to interest rate risk on those notes, however, the fair value of those notes will change as market interest rates change.

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We have a Term Loan B Facility under the Credit Agreement which bears a floating rate of interest that resets periodically, subject to a 0.75% floor on that floating rate, according to the terms of the agreement. Our financial results have been exposed to changes in the underlying base interest rate on that debt because the underlying base interest rate has now reset above the floor on such underlying interest rate. The fair value of Term Loan B Facility may fluctuate when the underlying base interest rate fluctuates below the floor or when the rate of return demanded by our loan investors increases relative to when the loans were issued. As of March 31, 2023, the Company had no outstanding borrowings under the Revolving Credit Facility. Should the company borrow under the Revolving Credit Facility at any point in the future, any associated borrowings would have a floating underlying base rate of interest that would expose the Company to interest rate risk.

We do not believe that an increase or decrease in interest rates of 100 basis points would have a material effect on our operating results or financial condition. The annualized impact to interest expense for each 100 basis points increase above the LIBOR Floor on our Term Loan B Facility is approximately $3.5 million. The actual impact to our financial results of the same increase in interest rates is expected to be lower than $3.5 million depending on the timing and magnitude of such rate changes relative to our LIBOR Floor, and will be partially offset by higher interest income earned on our cash and cash equivalent balances over the same period. In future periods, we will continue to evaluate our investment opportunities and policy relative to our overall objectives.

With regard to all debt currently outstanding, the company is potentially exposed to refinancing risk, should the Company seek to refinance existing debt or raise new debt in the future, and the prevailing cost or terms for that debt differs from terms in our current debt agreements.

Foreign Currency Exchange Risk

As a U.S. based company that does business around the globe, we have foreign currency risks related to our revenue and expenses denominated in currencies other than the U.S. Dollar, principally the British Pound, Australian Dollar, Canadian Dollar, and Euro. The volatility of exchange rates depends on many factors that we cannot forecast with reliable accuracy. In the event our non-U.S. Dollar denominated revenue and expenses increase, or the volatility of the foreign currencies that we transact in increases, our operating results may be more greatly affected by fluctuations in the exchange rates of those foreign currencies. In addition, we have experienced and will continue to experience fluctuations in our net income (loss) as a result of transaction gains and losses related to translating certain cash balances, trade accounts receivable and payable balances and intercompany balances that are denominated in currencies other than the U.S. Dollar. The effect of an immediate 10% adverse change in foreign exchange rates on foreign currency-denominated monetary assets and liabilities at March 31, 2023 and December 31, 2022, including intercompany balances, would result in a foreign currency loss of approximately $9.7 million and $10.5 million, respectively. At this time we do not, but we may in the future, enter into derivatives or other financial instruments in an attempt to hedge our foreign currency exchange risk. It is difficult to predict the impact hedging activities would have on our results of operations.

Inflation Risk

We do not believe that cost inflation has had a material effect on our business, financial condition, or results of operations. If our costs were to become subject to significant inflationary pressures, we might not be able to fully offset such higher costs through price increases. Our inability or failure to do so could harm our business, financial condition, and results of operations. This risk of cost inflation is distinct from the risk that inflation throughout the broader economy could lead to reduced ad spend and indirectly harm our business, financial condition, and results of operations. For a discussion of the indirect results of inflation on our business, see "Macroeconomic Developments."

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as defined in Rule 13a-15(e) under the Exchange Act. Our disclosure controls and procedures are designed to provide reasonable assurance of achieving their objectives of ensuring that information we are required to disclose in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosures, and is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms. There is no assurance that our disclosure controls and procedures will operate effectively under all circumstances. Based upon the evaluation described above, our Chief Executive Officer and Chief Financial Officer concluded that, as of March 31, 2023, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting that occurred during the three months ended March 31, 2023 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Inherent Limitations on Effectiveness of Controls     

Management recognizes that a control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints and that management is required to apply its judgment in evaluating the benefits of possible controls and procedures relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud or error, if any, have been detected. These inherent limitations include the realities that judgments in decision making can be faulty, and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

We and our subsidiaries may from time to time be parties to legal or regulatory proceedings, lawsuits and other claims incident to our business activities and to our status as a public company. Such routine matters may include, among other things, assertions of contract breach or intellectual property infringement, claims for indemnity arising in the course of our business, regulatory investigations or enforcement proceedings, and claims by persons whose employment has been terminated. Such matters are subject to many uncertainties, and outcomes are not predictable with assurance. Consequently, we are unable to ascertain the ultimate aggregate amount of monetary liability, amounts which may be covered by insurance or recoverable from third parties, or the financial impact with respect to such matters as of March 31, 2023. However, based on our knowledge as of March 31, 2023, we believe that the final resolution of such matters pending at the time of this report, individually and in the aggregate, will not have a material adverse effect upon our condensed consolidated financial position, results of operations or cash flows.

Refer to Note 12—"Commitments and Contingencies" for additional information related to legal proceedings.

Item 1A. Risk Factors

Investing in our common stock involves a high degree of risk. We describe risks associated with our business below and in Part I, Item 1A: "Risk Factors" of our Annual Report on Form 10-K for the year ended December 31, 2022 (the "Risk Factors"). Each of the risks described in our Risk Factors may be relevant to decisions regarding an investment in or ownership of our stock. The occurrence of any such risks could have a significant adverse effect on our reputation, business, financial condition, revenue, results of operations, growth, or ability to accomplish our strategic objectives, and could cause the trading price of our common stock to decline. You should carefully consider such risks and the other information contained in this report, including our condensed consolidated financial statements and related notes and Management's Discussion and Analysis of Financial Condition and Results of Operations, before making investment decisions related to our common stock.

There are no additional material changes to the Risk Factors of which we are currently aware; but our Risk Factors cannot anticipate and fully address all possible risks of investing in our common stock, the risks of investing in our common stock may change over time, and additional risks and uncertainties that we are not aware of, or that we do not consider to be material, may emerge. In addition, the economic impact of macroeconomic challenges, such as inflation, global conflict, capital market disruptions and the instability of financial institutions, the occurrence of a recession, and other macroeconomic factors may amplify many of the risks described in our risk factors. Accordingly, you are advised to consider additional sources of information and exercise your own judgment in addition to the information we provide.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(a) Recent Sales of Unregistered Securities

    None (except as previously disclosed).

(b) Use of Proceeds

    Not Applicable.

(c) Purchases of Equity Securities by the Company and Affiliated Purchasers

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    Common stock repurchases during the quarter ended March 31, 2023 were as follows (in thousands, except per share amounts):

Period	Total Number of Shares Purchased	Average Price per Share		Total number of shares purchased as part of a Publicly Announced Program	Maximum Approximate Dollar Value that May Yet be Purchased Under the Program
January 1 - January 31, 2023
Equity withholding(1)	40	$	10.05	—	$	—
Repurchase program(2)	—	$	—	—	$	28,330
February 1 - February 28, 2023
Equity withholding(1)	649	$	13.12	—	$	—
Repurchase program(2)	—	$	—	—	$	75,000
March 1 - March 31, 2023
Equity withholding(1)	11	$	10.84	—	$	—
Repurchase program(2)	—	$	—	—	$	34,172
	700			—

(1) Upon vesting of most restricted stock units, we are required to deposit minimum statutory employee withholding taxes on behalf of the holders of the vested awards. As reimbursement for these tax deposits, we have the option to withhold from shares otherwise issuable upon vesting a portion of those shares with a fair market value equal to the amount of the deposits we paid. Withholding of shares in this manner is accounted for as a repurchase of common stock.

(2) In December 2021, our Board of Directors approved a repurchase program (the "2021 Repurchase Plan") under which the Company was authorized to purchase up to $50.0 million of its common stock during the period from December 10, 2021 to December 10, 2022. On November 4, 2022, the Board of Directors approved an extension of the 2021 Repurchase Plan through December 15, 2023. At the time of extension, there was approximately $28.3 million remaining available under the program. Shares repurchased under the 2021 Repurchase Plan have all been subsequently retired, which was recorded as a reduction in additional paid in capital. The average price paid per share purchased under the Program includes broker commission costs. On February 16, 2023, our Board of Directors approved a repurchase plan (the “2023 Repurchase Plan”), pursuant to which the Company is authorized to purchase up to an aggregate of $75.0 million of common stock or Convertible Senior Notes through February 16, 2025. The 2023 Repurchase Plan replaces the 2021 Repurchase Plan. In March 2023, $40.8 million of the 2023 Repurchase Plan was used to purchase Convertible Senior Notes.

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Item 6. Exhibits

Number	Description
31.1*	Certification of Principal Executive Officer Pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Principal Financial Officer Pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32*(1)	Certification of the Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.ins *	Instance Document- the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.sch *	XBRL Taxonomy Schema Linkbase Document
101.cal *	XBRL Taxonomy Calculation Linkbase Document
101.def *	XBRL Taxonomy Definition Linkbase Document
101.lab *	XBRL Taxonomy Label Linkbase Document
101.pre *	XBRL Taxonomy Presentation Linkbase Document
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

*    Filed herewith

(1)    The information in this exhibit is furnished and deemed not filed with the Securities and Exchange Commission for purposes of section 18 of the Exchange Act of 1934, as amended (the "Exchange Act"), and is not to be incorporated by reference into any filing of Magnite, Inc. under the Securities Act of 1933, as amended (the "Securities Act"), or the Exchange Act, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

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.

	MAGNITE, INC. (Registrant)
	/s/  David Day
	David Day
	Chief Financial Officer (Principal Financial Officer and Duly Authorized Officer)
Date May 10, 2023

EX-31.1

Exhibit 31.1

Certification of Principal Executive Officer

pursuant to

Exchange Act Rules 13a-14(a) and 15d-14(a),

as adopted pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

I, Michael Barrett, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Magnite, Inc.;

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(s) 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(s) 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.

	Signature:	/s/ Michael Barrett
Date May 10, 2023		Michael Barrett President and Chief Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification of Principal Financial Officer

pursuant to

Exchange Act Rules 13a-14(a) and 15d-14(a),

as adopted pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

I, David Day, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Magnite, Inc.;

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(s) 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(s) 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.

	Signature:	/s/ David Day
Date May 10, 2023		David Day Chief Financial Officer (Principal Financial Officer)

EX-32

Exhibit 32

CERTIFICATIONS OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350,

 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350), Michael Barrett, President and Chief Executive Officer (Principal Executive Officer) of Magnite, Inc. (the "Company"), and David Day, Chief Financial Officer (Principal Financial Officer) of the Company, each hereby certifies that, to the best of his knowledge:

1.Our Quarterly Report on Form 10-Q for the quarter ended March 31, 2023, to which this certification is attached as Exhibit 32 (the "Report"), fully complies with the requirements of Section 13(a) or 15(d) 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.

Date May 10, 2023

/s/ Michael Barrett

Michael Barrett

President and Chief Executive Officer

(Principal Executive Officer)

/s/ David Day

David Day

Chief Financial Officer

(Principal Financial Officer)

The foregoing certifications are being furnished pursuant to 13 U.S.C. Section 1350. They are not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and are not to be incorporated by reference into any filing of the Company, regardless of any general incorporation language in such filing.

XML

Cover Page - shares	3 Months Ended
	Mar. 31, 2023	May 03, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	001-36384
Entity Registrant Name	MAGNITE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-8881738
Entity Address, Address Line One	1250 Broadway,
Entity Address, Address Line Two	15th Floor
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10001
City Area Code	212
Local Phone Number	243-2769
Title of 12(b) Security	Common stock, par value $0.00001 per share
Trading Symbol	MGNI
Security Exchange Name	NASDAQ
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		135,574,532
Entity Central Index Key	0001595974
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 236,550	$ 326,254
Accounts receivable, net	875,307	976,506
Prepaid expenses and other current assets	25,098	23,501
TOTAL CURRENT ASSETS	1,136,955	1,326,261
Property and equipment, net	45,641	44,969
Right-of-use lease asset	71,144	78,211
Internal use software development costs, net	23,256	23,671
Intangible assets, net	167,072	253,501
Goodwill	978,217	978,217
Other assets, non-current	7,590	7,383
TOTAL ASSETS	2,429,875	2,712,213
Current liabilities:
Accounts payable and accrued expenses	950,405	1,094,321
Lease liabilities, current	20,878	21,172
Debt, current	3,600	3,600
Other current liabilities	7,467	5,939
TOTAL CURRENT LIABILITIES	982,350	1,125,032
Debt, non-current, net of debt issuance costs	674,036	722,757
Lease liabilities, non-current	61,590	66,331
Deferred tax liability, net	4,708	5,072
Other liabilities, non-current	1,962	1,723
TOTAL LIABILITIES	1,724,646	1,920,915
Commitments and contingencies (Note 12)
STOCKHOLDERS' EQUITY
Preferred stock, $0.00001 par value, 10,000 shares authorized at March 31, 2023 and December 31, 2022; 0 shares issued and outstanding at March 31, 2023 and December 31, 2022	0	0
Common stock, $0.00001 par value; 500,000 shares authorized at March 31, 2023 and December 31, 2022; 135,438 and 134,006 shares issued and outstanding at March 31, 2023 and December 31, 2022	2	2
Additional paid-in capital	1,331,517	1,319,221
Accumulated other comprehensive loss	(2,784)	(3,151)
Accumulated deficit	(623,506)	(524,774)
TOTAL STOCKHOLDERS' EQUITY	705,229	791,298
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 2,429,875	$ 2,712,213

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Thousands	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Preferred stock, par value (usd per share)	$ 0.00001	$ 0.00001
Preferred stock, shares authorized (in shares)	10,000	10,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (usd per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	500,000	500,000
Common stock, shares, issued (in shares)	135,438	134,006

XML

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenue	$ 130,150	$ 118,075
Expenses:
Cost of revenue	124,828	59,396
Sales and marketing	53,049	50,000
Technology and development	24,215	23,043
General and administrative	21,088	18,704
Merger, acquisition, and restructuring costs	7,465	6,756
Total expenses	230,645	157,899
Loss from operations	(100,495)	(39,824)
Other (income) expense:
Interest expense, net	8,175	7,111
Other income	(1,313)	(1,263)
Foreign exchange loss, net	233	926
Gain on extinguishment of debt	(8,549)	0
Total other (income) expense, net	(1,454)	6,774
Loss before income taxes	(99,041)	(46,598)
Benefit for income taxes	(309)	(2,005)
Net loss	$ (98,732)	$ (44,593)
Net loss per share:
Basic (in dollars per share)	$ (0.73)	$ (0.34)
Diluted (in dollars per share)	$ (0.73)	$ (0.34)
Weighted average shares used to compute net loss per share:
Basic (in shares)	134,667	132,236
Diluted (in shares)	134,667	132,236

XML

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (98,732)	$ (44,593)
Other comprehensive loss:
Foreign currency translation adjustments	367	110
Other comprehensive income	367	110
Comprehensive loss	$ (98,365)	$ (44,483)

XML

Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Treasury Stock
Beginning Balance (in shares) at Dec. 31, 2021		132,553
Beginning Balance, treasury (in shares) at Dec. 31, 2021						(349)
Beginning Balance at Dec. 31, 2021	$ 880,757	$ 2	$ 1,282,589	$ (1,376)	$ (394,451)	$ (6,007)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options (in shares)		311
Exercise of common stock options	1,107		1,107
Issuance of common stock related to RSU vesting (in shares)		783
Shares withheld related to net share settlement (in shares)		(315)
Shares withheld related to net share settlement	(4,260)		(4,260)
Purchase of treasury stock (in shares)						(931)
Purchase of treasury stock	(12,138)					$ (12,138)
Retirement of common stock (in shares)		(1,280)				1,280
Retirement of common stock	0		(18,145)			$ 18,145
Stock-based compensation	16,927		16,927
Other comprehensive income	110			110
Net loss	(44,593)				(44,593)
Ending Balance, treasury (in shares) at Mar. 31, 2022						0
Ending Balance (in shares) at Mar. 31, 2022		132,052
Ending Balance at Mar. 31, 2022	837,910	$ 2	1,278,218	(1,266)	(439,044)	$ 0
Beginning Balance (in shares) at Dec. 31, 2022		134,006
Beginning Balance, treasury (in shares) at Dec. 31, 2022						0
Beginning Balance at Dec. 31, 2022	791,298	$ 2	1,319,221	(3,151)	(524,774)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options (in shares)		303
Exercise of common stock options	1,486		1,486
Issuance of common stock related to RSU vesting (in shares)		1,829
Shares withheld related to net share settlement (in shares)		(700)
Shares withheld related to net share settlement	(9,046)		(9,046)
Stock-based compensation	19,856		19,856
Other comprehensive income	367			367
Net loss	(98,732)				(98,732)
Ending Balance, treasury (in shares) at Mar. 31, 2023						0
Ending Balance (in shares) at Mar. 31, 2023		135,438
Ending Balance at Mar. 31, 2023	$ 705,229	$ 2	$ 1,331,517	$ (2,784)	$ (623,506)	$ 0

XML

Condensed Consolidated Statements of Cash Flows $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)
OPERATING ACTIVITIES:
Net loss	$ (98,732)	$ (44,593)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	95,795	45,866
Stock-based compensation	19,287	16,589
Impairment of intangible assets	0	3,320
Gain on extinguishment of debt	(8,549)	0
Gain on disposal of property and equipment	(26)	(2)
Provision for doubtful accounts	67	(571)
Amortization of debt discount and issuance costs	1,669	1,700
Non-cash lease expense	34	610
Deferred income taxes	(404)	(1,891)
Unrealized foreign currency (gain) loss, net	(1,463)	458
Other items, net	2,696	0
Changes in operating assets and liabilities, net of effect of business acquisitions:
Accounts receivable	100,142	146,241
Prepaid expenses and other assets	(2,063)	(2,279)
Accounts payable and accrued expenses	(141,068)	(141,312)
Other liabilities	1,722	(2,504)
Net cash (used in) provided by operating activities	(30,893)	21,632
INVESTING ACTIVITIES:
Purchases of property and equipment	(4,404)	(7,184)
Capitalized internal use software development costs	(3,063)	(3,382)
Mergers and acquisitions, net of cash acquired	0	(20,755)
Net cash used in investing activities	(7,467)	(31,321)
FINANCING ACTIVITIES:
Proceeds from exercise of stock options	1,486	1,107
Repayment of debt	(900)	(900)
Repurchase of Convertible Senior Notes	(40,828)	0
Repayment of financing lease	(208)	(197)
Purchase of treasury stock	0	(12,138)
Taxes paid related to net share settlement	(9,046)	(4,260)
Payment of indemnification claims holdback	(2,313)	0
Net cash used in financing activities	(51,809)	(16,388)
EFFECT OF EXCHANGE RATE CHANGES ON CASH, CASH EQUIVALENTS AND RESTRICTED CASH	265	268
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(89,904)	(25,809)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH — Beginning of period	326,502	230,693
CASH, CASH EQUIVALENTS AND RESTRICTED CASH — End of period	236,598	204,884
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH TO CONSOLIDATED BALANCE SHEETS
Cash and cash equivalents	236,550	204,589
Restricted cash included in prepaid expenses and other current assets	48	242
Restricted cash included in other assets, non-current	0	53
Total cash, cash equivalents and restricted cash	236,598	204,884
SUPPLEMENTAL DISCLOSURES OF OTHER CASH FLOW INFORMATION:
Cash paid for income taxes	1,547	338
Cash paid for interest	8,987	5,668
Capitalized assets financed by accounts payable and accrued expenses	3,320	372
Capitalized stock-based compensation	569	338
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	271	0
Purchase consideration - indemnification claims holdback	$ 0	$ 2,300

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Organization and Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Organization and Summary of Significant Accounting Policies

Organization and Summary of Significant Accounting Policies

Company Overview

Magnite, Inc. ("Magnite" or the "Company") was formed in Delaware and began operations on April 20, 2007. On April 1, 2020, Magnite completed a stock-for-stock merger with Telaria, Inc. ("Telaria" and such merger the "Telaria Merger"), a leading sell-side advertising platform and provider of connected television ("CTV") technology. On April 30, 2021, the Company completed its acquisition of SpotX, Inc. ("SpotX" and such acquisition the "SpotX Acquisition"), a leading CTV and video advertising platform. On July 1, 2021, the Company completed its acquisition of SpringServe, LLC ("SpringServe" and such acquisition the "SpringServe Acquisition"), a leading ad serving platform for CTV. Magnite has its principal offices in New York City, Los Angeles, Denver, London, and Sydney, and additional offices in Europe, Asia, North America, and South America.

The Company provides a technology solution to automate the purchase and sale of digital advertising inventory for buyers and sellers globally, across all channels, formats and auction types. The Company’s platform features applications and services for sellers of digital advertising inventory, or publishers, that own or operate websites, applications, CTV channels, and other digital media properties, to manage and monetize their inventory; applications and services for buyers, including advertisers, agencies, agency trading desks, and demand side platforms, to buy digital advertising inventory; and a transparent, independent marketplace that brings buyers and sellers together and facilitates intelligent decision making and automated transaction execution at scale. The Company's clients include many of the world's leading sellers and buyers of digital advertising inventory.

Basis of Presentation and Summary of Significant Accounting Policies

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair statement of the results for the interim period presented have been included. Operating results for the three months ended March 31, 2023 are not necessarily indicative of the results that may be expected for any future interim period, the year ending December 31, 2023, or for any future year.

The condensed consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto for the year ended December 31, 2022 included in its 2022 Annual Report on Form 10-K.

There have been no significant changes in the Company's accounting policies from those disclosed in its audited consolidated financial statements and notes thereto for the year ended December 31, 2022 included in its Annual Report on Form 10-K.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported and disclosed financial statements and accompanying footnotes. Due to the economic uncertainty of macroeconomic challenges, such as inflation, global conflict, capital market disruptions and instability of financial institutions, the occurrence of a recession, and other macroeconomic factors, it has become more difficult to apply certain assumptions and judgments into these estimates. The extent of the impact of these factors on the Company's operational and financial performance will depend on future developments, which are highly uncertain and cannot be predicted, including but not limited to the duration and how quickly and to what extent normal economic and operating conditions can resume. During the three months ended March 31, 2023, this uncertainty continued to result in a higher level of judgment related to its estimates and assumptions. As of the date of issuance of the condensed consolidated financial statements for the three months ended March 31, 2023, the Company is not aware of any specific event or circumstance that would require the Company to update its estimates, judgments, or revise the carrying value of its assets or liabilities. These estimates may change, as new events occur and additional information is obtained, and are recognized in the consolidated financial statements as soon as they become known. Actual results could differ materially from these estimates.

Recently Adopted Accounting Standards

In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805) – Accounting for Contract Assets and Contract Liabilities from Contracts with Customers ("ASU 2021-08"). ASU 2021-08 requires the recognition and measurement of contract assets and contract liabilities acquired in a business combination in accordance with ASC 606, Revenue from Contracts with Customers. Considerations to determine the amount of contract assets and contract liabilities to record at the acquisition date

include the terms of the acquired contract, such as timing of payment, identification of each performance obligation in the contract and allocation of the contract transaction price to each identified performance obligation on a relative standalone selling price basis as of contract inception. ASU 2021-08 is effective for the Company beginning in the first quarter of 2023. The Company adopted this standard January 1, 2023 and will apply the guidance to future acquisitions, if any.

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Net Loss Per Share

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Net Loss Per Share

Net Loss Per Share

The following table presents the basic and diluted net loss per share:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands, except per share data)
Basic and Diluted Loss Per Share:
Net loss	$	(98,732)	$	(44,593)
Weighted-average common shares outstanding	134,667		132,236
Weighted-average common shares outstanding used to compute net loss per share	134,667		132,236
Basic and diluted loss per share	$	(0.73)	$	(0.34)

The following weighted-average shares have been excluded from the calculation of diluted net loss per share attributable to common stockholders for each period presented because they are anti-dilutive:

	Three Months Ended
	March 31, 2023	March 31, 2022
	(in thousands)
Options to purchase common stock	1,742	2,593
Unvested restricted stock units	1,738	2,415
Unvested performance stock units	135	152
ESPP shares	17	—
Convertible Senior Notes	6,026	6,262
Total shares excluded from net loss per share	9,658	11,422

For the three months ended March 31, 2023 and 2022, the Company excluded outstanding performance stock units from the calculation of diluted net loss per share because they were anti-dilutive. As of March 31, 2023, the performance stock units granted in 2020, 2021, 2022, and 2023 had expected achievement levels of 94%, 0%, 54% and 29%, respectively. As of March 31, 2022, the performance stock units granted in 2020, 2021, and 2022 had expected achievement levels of 121%, 0%, and 51% respectively. Refer to Note 9—"Stock-Based Compensation" for additional information related to performance stock units.

For the three months ended March 31, 2023 and March 31, 2022, shares that would be issuable assuming conversion of all of the Convertible Senior Notes (as defined in Note 13) were excluded from the calculation of diluted loss per share because they were anti-dilutive. Diluted earnings per share for the Convertible Senior Notes is calculated under the if-converted method in accordance with ASC 260, Earnings Per Share. The Convertible Senior Notes have an initial conversion rate of 15.6539 shares of common stock per $1,000 principal amount of the Convertible Senior Notes, which will be subject to anti-dilution adjustments in certain circumstances. As of March 31, 2023 and 2022, the number of shares that would be issuable assuming conversion of all of the Convertible Senior Notes is approximately 5,474,952 and 6,261,560, respectively. Refer to Note 13—"Debt" for additional information related to accounting for Convertible Senior Notes issued and associated Capped Call Transactions

XML

Revenue

3 Months Ended

Mar. 31, 2023

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

For the majority of transactions on the Company's platform, the Company reports revenue on a net basis as it does not act as the principal in the purchase and sale of digital advertising inventory because it does not have control of the digital advertising inventory and does not set prices agreed upon within the auction marketplace. For certain advertising campaigns that are transacted through insertion orders, the Company reports revenue on a gross basis, based primarily on its determination that the Company acts as the primary obligor in the delivery of advertising campaigns for buyers with respect to such transactions.

The following table presents the Company's revenue recognized on a net basis and on a gross basis for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023				March 31, 2022
	(in thousands, except percentages)
Revenue:
Net basis	$	107,457	83	%	$	100,076	85	%
Gross basis	22,693		17		17,999		15
Total	$	130,150	100	%	$	118,075	100	%

The following table presents the Company's revenue by channel for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023				March 31, 2022
	(in thousands, except percentages)
Channel:
CTV	$	59,050	45	%	$	51,440	44	%
Mobile	48,184		37		39,029		33
Desktop	22,916		18		27,606		23
Total	$	130,150	100	%	$	118,075	100	%

    The following table presents the Company's revenue disaggregated by geographic location, based on the location of the Company's sellers for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
United States	$	97,156	$	90,408
International	32,994		27,667
Total	$	130,150	$	118,075

Payment terms are specified in agreements between the Company and the buyers and sellers on its platform. The Company generally bills buyers at the end of each month for the full purchase price of impressions filled in that month. The Company recognizes volume discounts as a reduction of revenue as they are incurred. Specific payment terms may vary by agreement, but are generally 75 days or less. The Company's accounts receivable are recorded at the amount of gross billings to buyers, net of allowances for the amounts the Company is responsible to collect. The Company's accounts payable related to amounts due to sellers are recorded at the net amount payable to sellers (see Note 5). Accordingly, both accounts receivable and accounts payable appear large in relation to revenue reported on a net basis.

Accounts receivable are recorded at the invoiced amount, are unsecured, and do not bear interest. The allowance for doubtful accounts is reviewed quarterly, requires judgment, and is based on the best estimate of the amount of probable credit losses in existing accounts receivable. The Company reviews the status of the then-outstanding accounts receivable on a customer-by-customer basis, taking into consideration the aging schedule of receivables, its historical collection experience, current information regarding the client, subsequent collection history, and other relevant data, in establishing the allowance for doubtful accounts. Accounts receivable is presented net of an allowance for doubtful accounts of $1.7 million at March 31, 2023, and $1.1 million at December 31, 2022. Accounts receivable are written off against the allowance for doubtful accounts when the Company determines amounts are no longer collectible.

The Company reviews the associated payable to sellers for recovery of buyer receivable allowance and write-offs; in some cases, the Company can reduce the payable to sellers. The reduction of seller payables related to recovery of uncollected buyer receivables is netted against allowance expense. The contra seller payables related to recoveries were $1.1 million and $0.6 million as of March 31, 2023 and December 31, 2022, respectively.

The following is a summary of activity in the allowance for doubtful accounts for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Allowance for doubtful accounts, beginning balance	$	1,092	$	3,475
Write-offs	(16)		—
Increase (decrease) in provision for expected credit losses	586		(1,466)
Recoveries of previous write-offs	—		87
Allowance for doubtful accounts, ending balance	$	1,662	$	2,096

During the three months ended March 31, 2023, the provision for expected credit losses associated with accounts receivable increased by $0.6 million, offset by increases of contra seller payables related to recoveries of uncollected buyer receivables of $0.5 million, which resulted in $0.1 million of bad debt expense. During the three months ended March 31, 2022, the provision for expected credit losses associated with accounts receivable decreased by $1.5 million, offset by decreases of contra seller payables related to recoveries of uncollected buyer receivables of an $0.9 million amount, which resulted in $0.6 million of bad debt expense.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Recurring Fair Value Measurements    

Fair value represents the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Observable inputs are based on market data obtained from independent sources. The fair value hierarchy is based on the following three levels of inputs, of which the first two are considered observable and the last one is considered unobservable:

•Level 1 – Quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

•Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.

•Level 3 – Unobservable inputs.

The table below sets forth a summary of financial instruments that are measured at fair value on a recurring basis at March 31, 2023:

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs  (Level 3)
	(in thousands)
Cash equivalents	$	22,636	$	22,636	$	—	$	—

The table below sets forth a summary of financial instruments that are measured at fair value on a recurring basis at December 31, 2022:

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs  (Level 3)
	(in thousands)
Cash equivalents	$	259,647	$	259,647	$	—	$	—

At March 31, 2023 and December 31, 2022, cash equivalents of $22.6 million and $259.6 million, respectively, consisted of money market funds and commercial paper, with original maturities of three months or less. The carrying amounts of cash equivalents are classified as Level 1 or Level 2 depending on whether or not their fair values are based on quoted market prices for identical securities that are traded in an active market.

At March 31, 2023 and December 31, 2022, the Company had Convertible Senior Notes and its Term Loan B Facility (as defined in Note 13) included in its balance sheets. The estimated fair value of the Company's Convertible Senior Notes was $282.4 million and $305.0 million as of March 31, 2023 and December 31, 2022, respectively. The estimated fair value of Convertible Senior Notes is based on market rates and the closing trading price of the Convertible Senior Notes as of March 31, 2023 and December 31, 2022 and is classified as Level 2 in the fair value hierarchy. At March 31, 2023 and December 31, 2022, the estimated fair value of the Company's Term Loan B Facility was $341.3 million and $333.3 million, respectively. The estimated fair value is based on borrowing rates currently available to the Company for financing with similar terms and is classified as Level 2 in the fair value hierarchy.

There were no transfers between Level 1 and Level 2 fair value measurements during the three months ended March 31, 2023 and 2022.

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Other Balance Sheet Amounts

3 Months Ended

Mar. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Other Balance Sheet Amounts

Other Balance Sheet Amounts

Accounts payable and accrued expenses included the following:

	March 31, 2023		December 31, 2022
	(in thousands)
Accounts payable—seller	$	913,047	$	1,057,556
Accounts payable—trade	21,725		19,387
Accrued employee-related payables	15,633		15,065
Accrued holdback - indemnification claims	—		2,313
Total	$	950,405	$	1,094,321

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Goodwill, Intangible Assets, Internal Use Software Development Costs, and Capitalized Costs Incurred in Cloud Computing Arrangements

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill, Intangible Assets, Internal Use Software Development Costs, and Capitalized Costs Incurred in Cloud Computing Arrangements

Goodwill, Intangible Assets, Internal Use Software Development Costs, and Capitalized Costs Incurred in Cloud Computing Arrangements

The Company's goodwill balance as of March 31, 2023 and December 31, 2022 was $978.2 million.

The Company’s intangible assets as of March 31, 2023 and December 31, 2022 included the following:

	March 31, 2023		December 31, 2022
	(in thousands)
Amortizable intangible assets:
Developed technology	$	390,136	$	390,136
Customer relationships	136,000		136,000
In-process research and development	12,730		12,730
Non-compete agreements	900		900
Trademarks	900		900
Total identifiable intangible assets, gross	540,666		540,666
Accumulated amortization—intangible assets:
Developed technology	(254,521)		(184,439)
Customer relationships	(111,984)		(97,316)
In-process research and development	(5,889)		(4,398)
Non-compete agreements	(675)		(562)
Trademarks	(525)		(450)
Total accumulated amortization—intangible assets	(373,594)		(287,165)
Total identifiable intangible assets, net	$	167,072	$	253,501

Amortization of intangible assets for the three months ended March 31, 2023 and 2022 was $86.4 million and $38.5 million, respectively. During the first quarter of 2022, the Company abandoned certain in-process research and development projects and technology intangible assets. The abandonment resulted in $3.3 million of impairment costs in the three months ended

March 31, 2022, which was included within merger, acquisition, and restructuring costs in the condensed consolidated statement of operations.

During the fourth quarter of 2022, the Company reassessed the remaining estimated useful lives of the developed technology and in-process research and development related to the SpotX acquisition based on the remaining expected benefit from those assets. The change in the remaining estimated useful lives for developed technology and in-process research and development resulted in increased amortization expense of $52.1 million for the three months ended March 31, 2023. The increased amortization expense increased the basic and diluted loss per share by $0.38, net of tax, for the three months ended March 31, 2023.

The estimated remaining amortization expense associated with the Company's intangible assets was as follows as of March 31, 2023:

Fiscal Year	Amount
	(in thousands)
Remaining 2023	$	116,061
2024	30,134
2025	14,445
2026	6,001
2027	431
Total	$	167,072

The Company capitalizes certain internal use software development costs associated with creating and enhancing internally developed software related to the Company’s technology infrastructure. During the fourth quarter of 2022, the Company reassessed the remaining estimated useful lives of capitalized software projects related to integration of its technology platforms. The change in the remaining estimated useful lives for the related projects resulted in increased amortization expense of $1.1 million for the three months ended March 31, 2023. The increased amortization expense increased the basic and diluted loss per share by $0.01, net of tax, for the three months ended March 31, 2023.

The Company capitalizes costs related to arrangements for infrastructure as a service, platform as a service, and software as a service. As of March 31, 2023 and December 31, 2022, capitalized costs associated with these arrangements was included within prepaid expenses and other current assets in the amounts of $0.7 million and $0.7 million, respectively, and within other assets, non-current in the amounts of $0.4 million and $0.5 million, respectively. The amortization of these agreements was immaterial for the three months ended March 31, 2023 and 2022.

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Business Combinations	3 Months Ended
	Mar. 31, 2023
Business Combination and Asset Acquisition [Abstract]
Business Combinations	Business Combinations 2022 Acquisition—CarbonThe Company completed the acquisition of the business of Carbon (AI) Limited ("Carbon" and such acquisition the "Carbon Acquisition"), a platform that enables publishers to measure, manage, and monetize audience segments, in February 2022 for a total purchase price of $23.1 million in cash. Approximately $2.3 million of the purchase price was held back to cover possible indemnification claims, which was subsequently paid out in February 2023.

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Merger, Acquisition, and Restructuring Costs

3 Months Ended

Mar. 31, 2023

Restructuring and Related Activities [Abstract]

Merger, Acquisition, and Restructuring Costs

Merger, Acquisition, and Restructuring CostsMerger, acquisition, and restructuring costs consist primarily of professional services fees and employee termination costs, including stock-based compensation charges, associated with the Telaria Merger, the SpotX Acquisition, and restructuring activities.

The following table summarizes merger, acquisition, and restructuring cost activity (in thousands):

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Personnel related (severance and one-time termination benefit costs)	$	3,218	$	717
Loss contracts (facilities related)	2,190		—
Exit costs	1,408		—
Impairment of property and equipment, net	506		—
Non-cash stock-based compensation (double-trigger acceleration and severance)	143		1,944
Impairment costs of abandoned technology	—		3,320
Professional services (investment banking advisory, legal and other professional services)	—		775
Total merger, acquisition, and restructuring costs	$	7,465	$	6,756

During the three months ended March 31, 2023 and 2022, the Company incurred costs of $7.5 million and $6.8 million, respectively, related to restructuring activities as a result of the Company's consolidation of its legacy CTV and SpotX CTV platforms following the SpotX Acquisition. During the three months ended March 31, 2023, these activities included the Company's reduction of its global workforce primarily associated with the elimination of duplicative roles and other costs associated with the the consolidation of its platforms, including loss contracts office facilities the Company does not plan to continue to occupy and impairment charges related to certain assets it no longer plans to utilize. During the three months ended March 31, 2022 the Company incurred costs primarily related to restructuring activities following the SpotX Acquisition.

Accrued restructuring costs related to mergers and acquisitions were $2.8 million and $1.2 million at March 31, 2023 and December 31, 2022, respectively, and were primarily related the Company's consolidation of its platforms as mentioned above and the Telaria Merger. Accrued restructuring costs associated with personnel costs are included within accounts payable and accrued expenses and accruals related to exit costs are included within other current liabilities and other liabilities, non-current on the Company's condensed consolidated balance sheets.

	(in thousands)
Accrued restructuring costs at December 31, 2022	$	1,222
Personnel related and non-cash stock-based compensation	3,361
Loss contracts (facilities related)	2,190
Exit costs	1,408
Impairment of property and equipment, net	506
Cash paid for restructuring costs	(3,043)
Non-cash loss contracts (facilities related)	(2,190)
Non-cash impairments	(506)
Non-cash stock-based compensation	(143)
Accrued restructuring costs at March 31, 2023	$	2,805

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Stock-Based Compensation

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

Stock-Based Compensation

Stock Options

A summary of stock option activity for the three months ended March 31, 2023 is as follows:

	Shares Under Option	Weighted- Average Exercise Price		Weighted- Average Contractual Life	Aggregate Intrinsic Value
	(in thousands)				(in thousands)
Outstanding at December 31, 2022	4,672	$	8.71
Granted	130	$	10.59
Exercised	(303)	$	4.91
Expired	(24)	$	35.81
Outstanding at March 31, 2023	4,475	$	8.88	5.8 years	$	13,756
Exercisable at March 31, 2023	3,551	$	7.39	5.2 years	$	12,905

The total intrinsic value of options exercised during the three months ended March 31, 2023 was $1.7 million. At March 31, 2023, the Company had unrecognized employee stock-based compensation expense relating to nonvested stock options of approximately $8.3 million, which is expected to be recognized over a weighted-average period of 2.4 years. Total grant date fair value of options vested during the three months ended March 31, 2023 was $2.2 million.

The Company estimates the fair value of stock options that contain service and/or performance conditions using the Black-Scholes option pricing model. The grant date fair value of options granted during the three months ended March 31, 2023 was $7.27 per share. The weighted-average input assumptions used by the Company were as follows:

	Three Months Ended
	March 31, 2023		March 31, 2022
Expected term (in years)	5.0		5.0
Risk-free interest rate	3.99	%	1.63	%
Expected volatility	84	%	79	%
Dividend yield	—	%	—	%

Restricted Stock Units

A summary of restricted stock unit activity for the three months ended March 31, 2023 is as follows:

	Number of Shares		Weighted-Average Grant Date Fair Value
	(in thousands)
Restricted stock units outstanding at December 31, 2022	10,000		$	15.06
Granted	6,793		$	10.72
Canceled	(826)		$	13.66
Vested and released	(1,829)		$	14.01
Restricted stock units outstanding at March 31, 2023	14,138	*	$	13.19
Restricted stock units outstanding and unvested	14,120		$	13.20
*At March 31, 2023, outstanding restricted stock units included 18,436 units that were vested but deferred.

The weighted-average grant date fair value per share of restricted stock units granted during the three months ended March 31, 2023 was $10.72. The intrinsic value of restricted stock units that vested during the three months ended March 31, 2023 was $23.5 million. At March 31, 2023, the intrinsic value of unvested restricted stock units was $130.7 million. At March 31, 2023, the Company had unrecognized stock-based compensation expense relating to unvested restricted stock units of approximately $167.0 million, which is expected to be recognized over a weighted-average period of 3.1 years.

Performance Stock Units

The Company has granted performance stock units ("PSU") to select executive employees that vest based on share price metrics tied to total shareholder return relative to a peer group over a three-year period. The grant date fair value for such PSUs was estimated using a Monte-Carlo simulation model that incorporates option-pricing inputs covering the period from the grant date through the end of the performance period. Between 0% and 150% of the performance stock units will vest on the third anniversary of the respective grant date.

The Company has additionally granted PSUs to the Company's CEO which are subject to both time-based and performance-based vesting conditions. The PSUs consist of three equal tranches (each, a "Performance Tranche"), based on achievement of a share price condition if the Company achieves share price targets of $60.00, $80.00, and $100.00, respectively, over 60 consecutive trading days during a performance period commencing on August 26, 2022 and ending on August 26, 2026. The grant date fair value for such PSUs was estimated using a Monte-Carlo simulation model that incorporates option-pricing inputs covering the period from the grant date through the end of the performance period. To the extent any of the performance-based requirements are met, the Company's CEO must also provide continued service to the Company through at least August 26, 2024 to receive any shares of common stock underlying the grant and through August 26, 2026 to receive all of the shares of common stock underlying the performance units that have satisfied the applicable performance-based requirement.

Stock-based compensation expense for PSUs is based on a performance measurement of 100%. The compensation expense will not be reversed if the performance metrics are not met.

A summary of performance stock units activity for the three months ended March 31, 2023 is as follows:

	Number of Shares	Weighted-Average Grant Date Fair Value
	(in thousands)
Outstanding at December 31, 2022	639	$	19.02
Granted	474	$	13.32
Outstanding at March 31, 2023	1,113	$	16.59

The grant date fair value for the PSUs was estimated using a Monte-Carlo simulation model. The weighted-average input assumptions used by the Company were as follows:

	Three Months Ended
	March 31, 2023		March 31, 2022
Expected term (in years)	3.0		3.0
Risk-free interest rate	4.19	%	1.39	%
Expected volatility of Magnite	94	%	84	%
Expected volatility of selected peer companies	64	%	63	%
Expected correlation coefficients of Magnite	0.62		0.56
Expected correlation coefficients of selected peer companies	0.54		0.52
Dividend yield	—	%	—	%

As of March 31, 2023, the Company had unrecognized stock-based compensation expense relating to outstanding PSUs of approximately $12.0 million, which will be recognized over a weighted-average period of 2.9 years.

Stock-Based Compensation Expense

Total stock-based compensation expense recorded in the condensed consolidated statements of operations was as follows:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Cost of revenue	$	468	$	350
Sales and marketing	7,405		5,341
Technology and development	5,446		4,717
General and administrative	5,825		4,237
Merger, acquisition, and restructuring costs	143		1,944
Total stock-based compensation expense	$	19,287	$	16,589

An aggregate of 14,781,139 shares remained available for future grants at March 31, 2023 under the Company's 2014 Equity Incentive Plan. The 2014 Equity Incentive Plan has an evergreen provision pursuant to which the share reserve automatically increased on January 1, 2023 in an amount equal to 5% of the total number of shares of capital stock outstanding on December 31, 2022. This plan expires in November 2023.

As of March 31, 2023, the Company has reserved 5,169,575 shares of its common stock for issuance under the Company's 2014 Employee Stock Purchase Plan ("ESPP"). The ESPP has an evergreen provision pursuant to which the share reserve automatically increased on January 1, 2023 in the amount equal to 1% of the total number of shares of capital stock outstanding on December 31, 2022. This plan expires in April 2024.

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Income Taxes

3 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

In determining quarterly provisions for income taxes, the Company uses the annual estimated effective tax rate applied to the actual year-to-date income. The Company's annual estimated effective tax rate differs from the statutory rate primarily as a result of state taxes, foreign taxes, deductible stock option expenses, nondeductible executive compensation, and changes in the Company's valuation allowance.

The Company recorded an income tax benefit of $0.3 million and $2.0 million for the three months ended March 31, 2023 and 2022, respectively. The tax benefit for the three months ended March 31, 2023 and March 31, 2022 is primarily the result of recognizing the benefit of deferred tax assets ("DTAs") previously subject to the domestic valuation allowance and the foreign income tax provision. The Company continues to maintain a partial valuation allowance for the domestic DTAs.

On August 16, 2022, President Biden signed the Inflation Reduction Act of 2022 (the “IRA”) into law. The IRA includes a new corporate alternative minimum tax (the “Corporate AMT”) of 15% on the adjusted financial statement income (the “AFSI”) of corporations with average AFSI exceeding $1.0 billion over a three-year period. The Corporate AMT is effective for tax years beginning after December 31, 2022 and is not expected to impact the Company. Additionally, the IRA imposes an excise tax of 1% on the fair market value of net stock repurchases made after December 31, 2022. The impact of this latter provision to the Company will be dependent upon the extent of share repurchases made in future periods.

Due to uncertainty as to the realization of benefits from the Company's domestic and certain international DTAs, including net operating loss carryforwards and research and development tax credits, the Company has a partial valuation allowance reserved against such assets. The Company intends to continue to maintain a partial valuation allowance on the DTAs until there is sufficient evidence to support the reversal of all or some additional portion of these allowances.

Due to the net operating loss carryforwards, all of the Company's United States federal and a majority of its state returns are open to examination by the Internal Revenue Service and state jurisdictions for all years since inception. For the Netherlands, Malaysia, India, Sweden, and the United Kingdom, all tax years remain open for examination by the local country tax authorities, for France only 2020 and forward are open, for Singapore only 2019 and forward are open for examination, for Australia, Brazil, Germany, and New Zealand 2018 and forward are open for examination, for Canada 2017 and forward are open for examination, and for Japan and Italy 2016 and forward remain open for examination.

Pursuant to Section 382 of the Internal Revenue Code, the Company and Telaria, Inc. both underwent ownership changes for tax purposes (i.e. a more than 50% change in stock ownership in aggregated 5% shareholders) on April 1, 2020 due to the Telaria Merger. As a result, the use of our total domestic NOL carryforwards and tax credits generated prior to the ownership change will be subject to annual use limitations under Section 382 and Section 383 of the Code and comparable state income tax laws. The Company believes that the ownership change will not impact our ability to utilize substantially all of our NOLs and state research and development carryforward tax credits to the extent it will generate taxable income that can be offset by such losses. The Company reasonably expects its pre-2021 federal research and development carryforward tax credits will not be recovered prior to expiration.

There was no material change to the Company's unrecognized tax benefits in the three months ended March 31, 2023 and the Company does not expect to have any material changes to unrecognized tax benefits through the end of the fiscal year.

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Lease Obligations

3 Months Ended

Mar. 31, 2023

Leases [Abstract]

Lease Obligations

Lease Obligations

For the three months ended March 31, 2023 and 2022, the Company recognized $6.5 million and $5.6 million, respectively, of operating lease expense associated with leases included in the lease liability and right of use ("ROU") asset on the condensed consolidated balance sheets. For lease expenses not included in the Company's ROU asset and lease liability balances, the Company recognized short term lease expense of $0.2 million and $0.3 million, respectively, and variable lease expense of $0.9 million and $0.5 million, respectively, during the three months ended March 31, 2023 and 2022.

The Company also received rental income of $1.3 million and $1.3 million for real estate leases for which it subleases the property to third parties during the three months ended March 31, 2023 and 2022, respectively.

As of March 31, 2023 and December 31, 2022, a weighted average discount rate of 6.13% and 6.11%, respectively, has been applied to the remaining lease payments to calculate the lease liabilities included within the condensed consolidated balance

sheet. The lease terms of the Company’s operating leases generally range from one year to ten years, and the weighted average remaining lease term of leases included in the lease liability is 5.5 years and 5.6 years as of March 31, 2023 and December 31, 2022, respectively.

The maturity of the Company's lease liabilities associated with leases included in the lease liability and ROU asset were as follows as of March 31, 2023 (in thousands):

Fiscal Year
Remaining 2023	$	19,311
2024	22,299
2025	14,487
2026	12,020
2027	7,431
Thereafter	21,011
Total lease payments (undiscounted)	96,559
Less: imputed interest	(14,091)
Lease liabilities—total (discounted)	$	82,468

In addition to the lease liabilities included in these condensed consolidated financial statements, the Company entered into an agreement for office space that had not commenced as of March 31, 2023; therefore, the lease was not included in the lease liability and ROU asset balance as of March 31, 2023. The Company has future commitments totaling $2.3 million over a term of 10.0 years related to this agreement.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments

The Company has commitments under non-cancelable operating leases for facilities, certain equipment, and its managed data center facilities (Note 11).

As of March 31, 2023 and December 31, 2022, the Company had $5.3 million and $5.3 million, respectively, of letters of credit associated with office leases available for borrowing, on which there were no outstanding borrowings as of either date.

In the normal course of business, the Company enters into non-cancelable contractual obligations with various parties, primarily related to software services agreements and data center providers that are not included in the Company's lease liability obligations and ROU assets. As of March 31, 2023, the Company's outstanding non-cancelable contractual obligations with a remaining term of one year or longer consist of the following (in thousands):

Fiscal Year
Remaining 2023	$	3,058
2024	6,953
2025	2,091
Total	$	12,102

Additionally, as of March 31, 2023, the Company has an agreement for cloud-managed services containing commitments that are variable in nature. Under this agreement, the Company has a non-cancelable minimum spend commitment from July 2023 to June 2025 based on actual spend, as defined in the agreement, with the third-party provider from July 2022 to June 2023. The estimated non-cancelable minimum annual obligation is approximately $42 million in each twelve-month period (i.e. July 2023 to June 2024 and July 2024 to June 2025), based on spend in the nine months ended March 31, 2023. Per the agreement, the commitment from July 2023 to June 2025 will generally increase as the amount of spend during the period from July 2022 to June 2023 increases. Because the Company expects to continue to spend under this agreement through June 2023, the Company also expects that the minimum future commitment will likely increase as a result of the higher level of spend.

Guarantees and Indemnification

The Company’s agreements with sellers, buyers, and other third parties typically obligate the Company to provide indemnity and defense for losses resulting from claims of intellectual property infringement, damages to property or persons, business losses, or other liabilities. Generally, these indemnity and defense obligations relate to the Company’s own business

operations, obligations, and acts or omissions. However, under some circumstances, the Company agrees to indemnify and defend contract counterparties against losses resulting from their own business operations, obligations, and acts or omissions, or the business operations, obligations, and acts or omissions of third parties. For example, because the Company’s business interposes the Company between buyers and sellers in various ways, buyers often require the Company to indemnify them against acts and omissions of sellers, and sellers often require the Company to indemnify them against acts and omissions of buyers. In addition, the Company’s agreements with sellers, buyers, and other third parties typically include provisions limiting the Company’s liability to the counterparty, and the counterparty’s liability to the Company. These limits sometimes do not apply to certain liabilities, including indemnity obligations. These indemnity and limitation of liability provisions generally survive termination or expiration of the agreements in which they appear. The Company has also entered into indemnification agreements with its directors, executive officers, and certain other officers that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors, officers, or employees. No material demands have been made upon the Company to provide indemnification under such agreements and there are no claims that the Company is aware of that could have a material effect on the Company’s consolidated financial statements.

Litigation

The Company and its subsidiaries may from time to time be parties to legal or regulatory proceedings, lawsuits and other claims incident to their business activities and to the Company’s status as a public company. Such matters may include, among other things, assertions of contract breach or intellectual property infringement, claims for indemnity arising in the course of the Company’s business, regulatory investigations or enforcement proceedings, and claims by persons whose employment has been terminated. Such matters are subject to many uncertainties, and outcomes are not predictable with assurance. Consequently, management is unable to ascertain the ultimate aggregate amount of monetary liability, amounts which may be covered by insurance or recoverable from third parties, or the financial impact with respect to such matters as of March 31, 2023. However, based on management’s knowledge as of March 31, 2023, management believes that the final resolution of these matters known at such date, individually and in the aggregate, will not have a material adverse effect upon the Company’s consolidated financial position, results of operations or cash flows.

Employment Contracts

The Company has entered into severance agreements with certain employees and officers. The Company may be required to pay severance and accelerate the vesting of certain equity awards in the event of involuntary terminations.

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Debt

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Debt

Debt

Long term debt as of March 31, 2023 and December 31, 2022 consisted of the following:

	March 31, 2023		December 31, 2022
	(in thousands)
Convertible Senior Notes	$	349,750	$	400,000
Less: Unamortized debt issuance cost	(5,931)		(7,355)
Net	343,819		392,645
Term Loan B Facility	353,700		354,600
Less: Unamortized discount and debt issuance cost	(19,883)		(20,888)
Net	333,817		333,712
Less: Current portion	(3,600)		(3,600)
Total non-current debt	$	674,036	$	722,757

Maturities of the principal amount of the Company's long-term debt as of March 31, 2023 are as follows (in thousands):

Fiscal Year
Remaining 2023	2,700
2024	3,600
2025	3,600
2026	353,350
2027	3,600
Thereafter	336,600
Total	$	703,450

Amortization of the debt issuance cost and the discount associated with our indebtedness totaled $1.6 million for the three months ended March 31, 2023 and $1.6 million for the three months ended March 31, 2022. Amortization of debt issuance costs is computed using the effective interest method and is included in interest expense. In addition, amortization of deferred financing costs was $0.1 million for the three months ended March 31, 2023 and 2022. Deferred financing costs are included in prepaid expenses and other current assets and other assets, non-current assets.

Convertible Senior Notes and Capped Call Transactions

In March 2021, the Company issued $400.0 million aggregate principal amount of 0.25% convertible senior notes in a private placement, including $50.0 million aggregate principal amount of such notes pursuant to the exercise in full of the over-allotment options of the initial purchasers (collectively, the "Convertible Senior Notes"). The Convertible Senior Notes will mature on March 15, 2026, unless earlier repurchased, redeemed or converted. The total net proceeds from the offering, after deducting debt issuance costs, paid by the Company, were approximately $388.6 million. The Company used approximately $39.0 million of the net proceeds from the offering to pay for the Capped Call Transactions (as described below).

The Convertible Senior Notes are senior, unsecured obligations and are (i) equal in right of payment with the existing and future senior, unsecured indebtedness; (ii) senior in right of payment to any of the Company’s future indebtedness that is expressly subordinated to the Convertible Senior Notes; (iii) effectively subordinated to the Company’s existing and future secured indebtedness, to the extent of the value of the collateral securing that indebtedness, including amounts outstanding under our Loan Agreement or our new Credit Agreement (see section below); and (iv) structurally subordinated to all existing and future indebtedness and other liabilities, including trade payables, and (to the extent we are not a holder thereof) preferred equity, if any, of the Company’s subsidiaries that do not guarantee the Convertible Senior Notes.

The Convertible Senior Notes accrue interest at 0.25% per annum payable semi-annually in arrears on March 15 and September 15 of each year, beginning on September 15, 2021. The Convertible Senior Notes will mature on March 15, 2026 unless they are redeemed, repurchased or converted prior to such date. The Convertible Senior Notes are convertible at the option of holders only during certain periods and upon satisfaction of certain conditions.

Holders have the right to convert their notes (or any portion of a note in an authorized denomination), in the following circumstances: (i) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021, if the last reported sale price per share of the Company’s common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (ii) during the five consecutive business days immediately after any ten consecutive trading day period (such ten consecutive trading day period, the "measurement period") in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of the Company’s common stock on such trading day and the conversion rate on such trading day; (iii) upon the occurrence of certain corporate events or distributions on the Company’s common stock; (iv) if the Company calls such Convertible Senior Notes for redemption; and (v) on or after September 15, 2025, until the close of business on the second scheduled trading day immediately before the maturity date, holders of the Convertible Senior Notes may, at their option, convert all or a portion of their Convertible Senior Notes regardless of the foregoing conditions at any time from, and including, September 15, 2025 until the close of business on the second scheduled trading day immediately before the maturity date.

Upon conversion, the Convertible Senior Notes may be settled in shares of the Company’s common stock, cash or a combination of cash and shares of the Company’s common stock, at the Company’s election. All conversions with a conversion date that occurs on or after September 15, 2025 will be settled using the same settlement method, and the Company will send notice of such settlement method to noteholders no later than the open of business on September 15, 2025.

The Company may not redeem the Convertible Senior Notes at their option at any time before March 20, 2024. Subject to the terms of the indenture agreement, the Company has the right, at its election, to redeem all, or any portion (subject to the partial

redemption limitation) in an authorized denomination, of the Convertible Senior Notes, at any time, and from time to time, on a redemption date on or after March 20, 2024 and on or before the 40th scheduled trading day immediately before the maturity date, for cash, but only if the "last reported sale price," as defined under the Offering Memorandum, per share of common stock exceeds 130% of the “conversion price” on (i) each of at least 20 trading days, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date the Company sends the related redemption notice; and (ii) the trading day immediately before the date we send such notice. In addition, calling any note for redemption will constitute a "make-whole fundamental change" (as defined below) with respect to that note, in which case the conversion rate applicable to the conversion of that note will be increased in certain circumstances if it is converted after it is called for redemption. If the Company elects to redeem less than all of the outstanding notes, then the redemption will not constitute a make-whole fundamental change with respect to the notes not called for redemption, and holders of the notes not called for redemption will not be entitled to an increased conversion rate for such notes as described above on account of the redemption, except to the limited extent described further below. No sinking fund is provided for the Convertible Senior Notes, which means that the Company is not required to redeem or retire the Convertible Senior Notes periodically.

If a fundamental change occurs, then each noteholder will have the right to require the Company to repurchase its notes (or any portion thereof in an authorized denomination) for cash on a date (the "fundamental change repurchase date") of the Company’s choosing, which must be a business day that is no more than 45, nor less than 20, business days after the date the Company distributes the related fundamental change notice.

If an event of default, other than a reporting default remedied by special interest as defined in the indenture agreement, occurs with respect to the Company or any guarantor, then the principal amount of, and all accrued and unpaid interest on, all of the notes then outstanding will immediately become due and payable without any further action or notice by any person. If an event of default (other than a reporting event of default described above with respect to the Company or any guarantor and not solely with respect to a significant subsidiary of the Company’s or a guarantor, other than the Company or such guarantor) occurs and is continuing, then, the trustee, by notice to the Company, or noteholders of at least 25% of the aggregate principal amount of notes then outstanding, by written notice to the Company and the trustee, may declare the principal amount of, and all accrued and unpaid interest on, all of the notes then outstanding to become due and payable immediately.

The Convertible Senior Notes have an initial conversion rate of 15.6539 shares of common stock per $1,000 principal amount of the Convertible Senior Notes, which will be subject to customary anti-dilution adjustments in certain circumstances.

In connection with the pricing of the Convertible Senior Notes, the Company entered into privately negotiated capped call transactions with various financial institutions (the "Capped Call Transactions"). The Capped Call Transactions were entered into with third party broker-dealers to limit the potential dilution that would occur if the Company has to settle the conversion value in excess of the principal in shares. This exposure will be covered (i.e., the Company will receive as many shares as are required to be issued between the conversion price of $63.8818 and the maximum price of $91.2600). Any shares required to be issued by the Company over this amount would have net earnings per share dilution impact. By entering into the Capped Call Transactions, the Company expects to reduce the potential dilution to its common stock (or, in the event the conversion is settled in cash, to reduce its cash payment obligation) in the event that at the time of conversion its stock price exceeds the conversion price under the Convertible Senior Notes. The Company paid $39.0 million for the Capped Call Transactions, which was recorded as additional paid-in capital, using a portion of the gross proceeds from the sale of the Convertible Senior Notes. The cost of the Capped Call Transactions is not expected to be tax deductible as the Company did not elect to integrate the capped call into the Convertible Senior Notes for tax purposes. The cost of the Capped Call Transaction was recorded as a reduction of the Company’s additional paid-in capital in the accompanying condensed consolidated financial statements.

The Company incurred debt issuance costs of $11.4 million in March 2021. The Convertible Senior Notes are presented net of issuance costs on the Company's condensed consolidated balance sheets. The debt issuance costs are amortized on an effective interest basis over the term of the Convertible Senior Notes and are included in interest expense and amortization of debt discount in the accompanying condensed consolidated statements of operations.

In March 2023, the Company repurchased a portion of its Convertible Senior Notes in the open market with cash on hand for $40.8 million. The Company recognized a gain on extinguishment of debt of $8.5 million related to the repurchase of $50.3 million of principal balance of Convertible Senior Notes and $0.9 million of unamortized debt issuance costs associated with the

extinguished debt. The gain on extinguishment is included in other (income) expense in the Company's condensed consolidated statement of operations.

The following table sets forth interest expense related to the Convertible Senior Notes for the three months ended March 31, 2023 and 2022 (in thousands, except interest rates):

	Three Months Ended
	March 31, 2023			March 31, 2022
Contractual interest expense	$	241		$	250
Amortization of debt issuance costs	551			572
Total interest expense	$	792		$	822
Effective interest rate	0.82		%	0.82		%

Amortization expense for the Company's debt issuance costs related to the Convertible Senior Notes for the fiscal years 2023 through 2026 is as follows (in thousands):

Fiscal Year	Debt Issuance Costs
Remaining 2023	1,499
2024	2,001
2025	2,001
2026	430
Total	$	5,931

Credit Agreement

On April 30, 2021, the Company entered into a credit agreement (the "Credit Agreement") with Goldman Sachs Bank USA as administrative agent and collateral agent, and other lender parties thereto. The Credit Agreement provides for a $360.0 million seven-year senior secured term loan facility ("Term Loan B Facility") and a $52.5 million senior secured revolving credit facility (the "Revolving Credit Facility"). As part of the Term Loan B Facility, the Company received $325 million in proceeds, net of discounts and fees, which were used to finance the SpotX Acquisition and related transactions, and for general corporate purposes. Loans, if any, under the Revolving Credit Facility are expected to be used for general corporate purposes. The obligations under the Credit Agreement are secured by substantially all of the assets of the Company and those of its subsidiaries that are guarantors under the Credit Agreement.

Amounts outstanding under the Credit Agreement accrue interest at a rate equal to either, (1) for the Term Loan B Facility, at the Company’s election, the Eurodollar Rate (as defined in the Credit Agreement) plus a margin of 5.00% per annum, or ABR (as defined in the Credit Agreement) plus a margin of 4.00%, and (2) for the Revolving Credit Facility, at the Company’s election, the Eurodollar Rate plus a margin of 4.25% to 4.75%, or ABR plus a margin of 3.25% to 3.75%, in each case, depending on the Company’s first lien net leverage ratio. As of March 31, 2023, the contractual interest rate related to the Term Loan B Facility was 9.91%.

The covenants of the Credit Agreement include customary negative covenants that, among other things, restrict the Company’s ability to incur additional indebtedness, grant liens and make certain acquisitions, investments, asset dispositions and restricted payments. In addition, the Credit Agreement contains a financial covenant, tested on the last day of any fiscal quarter if utilization of the Revolving Credit Facility exceeds 35% of the total revolving commitments, that requires the Company to maintain a first lien net leverage ratio not greater than 3.25 to 1.00. As of March 31, 2023, the Company was in compliance with its debt covenants.

The Credit Agreement includes customary events of default, and customary rights and remedies upon the occurrence of any event of default thereunder, including rights to accelerate the loans, terminate the commitments thereunder and realize upon the collateral securing the obligations under the Credit Agreement. The Credit Agreement calls for customary scheduled loan amortization payments of 0.25% of the initial principal balance payable quarterly (i.e. 1% in aggregate per year) as well as a provision that requires the Company to prepay the Term Loan B based on an annual calculation of cumulative free cash flow ("Excess Cash Flow") generated by the company as defined within the terms of the Agreement. The Company was not required to make any such mandatory prepayment required by the Excess Cash Flow provision for the period ended March 31, 2023. In addition, the Credit Agreement will mature in the event that any portion of the Convertible Senior Notes remains outstanding 91 days prior to the maturity date of the Convertible Senior Notes.

On June 28, 2021, the Company entered into an Incremental Assumption Agreement (the "Incremental Agreement") to the Credit Agreement. Pursuant to the terms of the Incremental Agreement, the Company’s existing revolving credit facility under the Credit Agreement was increased by $12.5 million (the "Incremental Revolver"), and the letter of credit sublimit under the Credit Agreement was increased by $5.0 million. The Incremental Revolver bears the same interest rate as the existing revolving credit facility and has the same maturity date as the existing revolving credit facility. No other terms of the Credit Agreement were amended. As a result, amounts available under the Revolving Credit Facility were $65.0 million. At March 31, 2023, amounts available under the Revolving Credit Facility were $59.7 million, net of letters of credit outstanding in the amount of $5.3 million.

The following table summarizes the amount outstanding under the Term Loan B Facility at March 31, 2023 and December 31, 2022:

	March 31, 2023		December 31, 2022
	(in thousands)
Term Loan B Facility	$	353,700	$	354,600
Unamortized debt discounts	(7,765)		(8,158)
Unamortized debt issuance costs	(12,118)		(12,730)
Debt, net of debt issuance costs	$	333,817	$	333,712

The Company incurred debt issuance costs of $27.7 million in April 2021, of which $10.8 million were associated with debt discount netted against the proceeds and $16.9 million were associated with other deferred financing costs associated with the Term Loan B Facility. Debt outstanding under the Term Loan B Facility are presented net of issuance costs on the Company's condensed consolidated balance sheets. The debt issuance costs are amortized on an effective interest basis over the term of the Term Loan B Facility and are included in interest expense and amortization of debt discount in the accompanying condensed consolidated statements of operations.

The following table sets forth interest expense related to the Term Loan B Facility for the three months ended March 31, 2023 and 2022 (in thousands, except interest rates):

	Three Months Ended
	March 31, 2023			March 31, 2022
Contractual interest expense	$	8,436		$	5,163
Amortization of debt discount	393			397
Amortization of debt issuance costs	612			619
Total interest expense	$	9,441		$	6,179
Effective interest rate	10.65		%	6.98		%

Amortization expense for the Term Loan B Facility debt discount and debt issuance costs for fiscal years 2023 through 2028 is as follows (in thousands):

Fiscal Year	Debt Discount		Debt Issuance Costs
Remaining 2023	$	1,171	$	1,829
2024	1,548		2,416
2025	1,532		2,391
2026	1,516		2,366
2027	1,500		2,341
Thereafter	498		775
Total	$	7,765	$	12,118

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Organization and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation and Summary of Significant Accounting Policies

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair statement of the results for the interim period presented have been included. Operating results for the three months ended March 31, 2023 are not necessarily indicative of the results that may be expected for any future interim period, the year ending December 31, 2023, or for any future year.

The condensed consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto for the year ended December 31, 2022 included in its 2022 Annual Report on Form 10-K.

There have been no significant changes in the Company's accounting policies from those disclosed in its audited consolidated financial statements and notes thereto for the year ended December 31, 2022 included in its Annual Report on Form 10-K.

Use of Estimates

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported and disclosed financial statements and accompanying footnotes. Due to the economic uncertainty of macroeconomic challenges, such as inflation, global conflict, capital market disruptions and instability of financial institutions, the occurrence of a recession, and other macroeconomic factors, it has become more difficult to apply certain assumptions and judgments into these estimates. The extent of the impact of these factors on the Company's operational and financial performance will depend on future developments, which are highly uncertain and cannot be predicted, including but not limited to the duration and how quickly and to what extent normal economic and operating conditions can resume. During the three months ended March 31, 2023, this uncertainty continued to result in a higher level of judgment related to its estimates and assumptions. As of the date of issuance of the condensed consolidated financial statements for the three months ended March 31, 2023, the Company is not aware of any specific event or circumstance that would require the Company to update its estimates, judgments, or revise the carrying value of its assets or liabilities. These estimates may change, as new events occur and additional information is obtained, and are recognized in the consolidated financial statements as soon as they become known. Actual results could differ materially from these estimates.

Recently Adopted Accounting Standards

Recently Adopted Accounting Standards

In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805) – Accounting for Contract Assets and Contract Liabilities from Contracts with Customers ("ASU 2021-08"). ASU 2021-08 requires the recognition and measurement of contract assets and contract liabilities acquired in a business combination in accordance with ASC 606, Revenue from Contracts with Customers. Considerations to determine the amount of contract assets and contract liabilities to record at the acquisition date

include the terms of the acquired contract, such as timing of payment, identification of each performance obligation in the contract and allocation of the contract transaction price to each identified performance obligation on a relative standalone selling price basis as of contract inception. ASU 2021-08 is effective for the Company beginning in the first quarter of 2023. The Company adopted this standard January 1, 2023 and will apply the guidance to future acquisitions, if any.

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Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Schedule of Net Loss Per Share, Basic and Diluted

The following table presents the basic and diluted net loss per share:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands, except per share data)
Basic and Diluted Loss Per Share:
Net loss	$	(98,732)	$	(44,593)
Weighted-average common shares outstanding	134,667		132,236
Weighted-average common shares outstanding used to compute net loss per share	134,667		132,236
Basic and diluted loss per share	$	(0.73)	$	(0.34)

Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share

The following weighted-average shares have been excluded from the calculation of diluted net loss per share attributable to common stockholders for each period presented because they are anti-dilutive:

	Three Months Ended
	March 31, 2023	March 31, 2022
	(in thousands)
Options to purchase common stock	1,742	2,593
Unvested restricted stock units	1,738	2,415
Unvested performance stock units	135	152
ESPP shares	17	—
Convertible Senior Notes	6,026	6,262
Total shares excluded from net loss per share	9,658	11,422

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Revenue (Tables)

3 Months Ended

Mar. 31, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Revenue Recognized on a Net Basis and on a Gross Basis

The following table presents the Company's revenue recognized on a net basis and on a gross basis for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023				March 31, 2022
	(in thousands, except percentages)
Revenue:
Net basis	$	107,457	83	%	$	100,076	85	%
Gross basis	22,693		17		17,999		15
Total	$	130,150	100	%	$	118,075	100	%

Summary of Disaggregation of Revenue

The following table presents the Company's revenue by channel for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023				March 31, 2022
	(in thousands, except percentages)
Channel:
CTV	$	59,050	45	%	$	51,440	44	%
Mobile	48,184		37		39,029		33
Desktop	22,916		18		27,606		23
Total	$	130,150	100	%	$	118,075	100	%

    The following table presents the Company's revenue disaggregated by geographic location, based on the location of the Company's sellers for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
United States	$	97,156	$	90,408
International	32,994		27,667
Total	$	130,150	$	118,075

Accounts Receivable, Allowance for Credit Loss

The following is a summary of activity in the allowance for doubtful accounts for the three months ended March 31, 2023 and 2022:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Allowance for doubtful accounts, beginning balance	$	1,092	$	3,475
Write-offs	(16)		—
Increase (decrease) in provision for expected credit losses	586		(1,466)
Recoveries of previous write-offs	—		87
Allowance for doubtful accounts, ending balance	$	1,662	$	2,096

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis

The table below sets forth a summary of financial instruments that are measured at fair value on a recurring basis at March 31, 2023:

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs  (Level 3)
	(in thousands)
Cash equivalents	$	22,636	$	22,636	$	—	$	—

The table below sets forth a summary of financial instruments that are measured at fair value on a recurring basis at December 31, 2022:

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs  (Level 3)
	(in thousands)
Cash equivalents	$	259,647	$	259,647	$	—	$	—

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Other Balance Sheet Amounts (Tables)

3 Months Ended

Mar. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses included the following:

	March 31, 2023		December 31, 2022
	(in thousands)
Accounts payable—seller	$	913,047	$	1,057,556
Accounts payable—trade	21,725		19,387
Accrued employee-related payables	15,633		15,065
Accrued holdback - indemnification claims	—		2,313
Total	$	950,405	$	1,094,321

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Goodwill, Intangible Assets, Internal Use Software Development Costs, and Capitalized Costs Incurred in Cloud Computing Arrangements (Tables)

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets

The Company’s intangible assets as of March 31, 2023 and December 31, 2022 included the following:

	March 31, 2023		December 31, 2022
	(in thousands)
Amortizable intangible assets:
Developed technology	$	390,136	$	390,136
Customer relationships	136,000		136,000
In-process research and development	12,730		12,730
Non-compete agreements	900		900
Trademarks	900		900
Total identifiable intangible assets, gross	540,666		540,666
Accumulated amortization—intangible assets:
Developed technology	(254,521)		(184,439)
Customer relationships	(111,984)		(97,316)
In-process research and development	(5,889)		(4,398)
Non-compete agreements	(675)		(562)
Trademarks	(525)		(450)
Total accumulated amortization—intangible assets	(373,594)		(287,165)
Total identifiable intangible assets, net	$	167,072	$	253,501

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The estimated remaining amortization expense associated with the Company's intangible assets was as follows as of March 31, 2023:

Fiscal Year	Amount
	(in thousands)
Remaining 2023	$	116,061
2024	30,134
2025	14,445
2026	6,001
2027	431
Total	$	167,072

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Merger, Acquisition, and Restructuring Costs (Tables)

3 Months Ended

Mar. 31, 2023

Restructuring and Related Activities [Abstract]

Merger, Acquisition, and Restructuring Costs

The following table summarizes merger, acquisition, and restructuring cost activity (in thousands):

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Personnel related (severance and one-time termination benefit costs)	$	3,218	$	717
Loss contracts (facilities related)	2,190		—
Exit costs	1,408		—
Impairment of property and equipment, net	506		—
Non-cash stock-based compensation (double-trigger acceleration and severance)	143		1,944
Impairment costs of abandoned technology	—		3,320
Professional services (investment banking advisory, legal and other professional services)	—		775
Total merger, acquisition, and restructuring costs	$	7,465	$	6,756

	(in thousands)
Accrued restructuring costs at December 31, 2022	$	1,222
Personnel related and non-cash stock-based compensation	3,361
Loss contracts (facilities related)	2,190
Exit costs	1,408
Impairment of property and equipment, net	506
Cash paid for restructuring costs	(3,043)
Non-cash loss contracts (facilities related)	(2,190)
Non-cash impairments	(506)
Non-cash stock-based compensation	(143)
Accrued restructuring costs at March 31, 2023	$	2,805

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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

A summary of stock option activity for the three months ended March 31, 2023 is as follows:

	Shares Under Option	Weighted- Average Exercise Price		Weighted- Average Contractual Life	Aggregate Intrinsic Value
	(in thousands)				(in thousands)
Outstanding at December 31, 2022	4,672	$	8.71
Granted	130	$	10.59
Exercised	(303)	$	4.91
Expired	(24)	$	35.81
Outstanding at March 31, 2023	4,475	$	8.88	5.8 years	$	13,756
Exercisable at March 31, 2023	3,551	$	7.39	5.2 years	$	12,905

Schedule of Nonvested Restricted Stock Units Activity

A summary of restricted stock unit activity for the three months ended March 31, 2023 is as follows:

	Number of Shares		Weighted-Average Grant Date Fair Value
	(in thousands)
Restricted stock units outstanding at December 31, 2022	10,000		$	15.06
Granted	6,793		$	10.72
Canceled	(826)		$	13.66
Vested and released	(1,829)		$	14.01
Restricted stock units outstanding at March 31, 2023	14,138	*	$	13.19
Restricted stock units outstanding and unvested	14,120		$	13.20
*At March 31, 2023, outstanding restricted stock units included 18,436 units that were vested but deferred.

Schedule of Nonvested Performance-Based Units Activity

A summary of performance stock units activity for the three months ended March 31, 2023 is as follows:

	Number of Shares	Weighted-Average Grant Date Fair Value
	(in thousands)
Outstanding at December 31, 2022	639	$	19.02
Granted	474	$	13.32
Outstanding at March 31, 2023	1,113	$	16.59

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The weighted-average input assumptions used by the Company were as follows:

	Three Months Ended
	March 31, 2023		March 31, 2022
Expected term (in years)	5.0		5.0
Risk-free interest rate	3.99	%	1.63	%
Expected volatility	84	%	79	%
Dividend yield	—	%	—	%

The grant date fair value for the PSUs was estimated using a Monte-Carlo simulation model. The weighted-average input assumptions used by the Company were as follows:

	Three Months Ended
	March 31, 2023		March 31, 2022
Expected term (in years)	3.0		3.0
Risk-free interest rate	4.19	%	1.39	%
Expected volatility of Magnite	94	%	84	%
Expected volatility of selected peer companies	64	%	63	%
Expected correlation coefficients of Magnite	0.62		0.56
Expected correlation coefficients of selected peer companies	0.54		0.52
Dividend yield	—	%	—	%

Schedule of Stock Based Compensation Expense

Total stock-based compensation expense recorded in the condensed consolidated statements of operations was as follows:

	Three Months Ended
	March 31, 2023		March 31, 2022
	(in thousands)
Cost of revenue	$	468	$	350
Sales and marketing	7,405		5,341
Technology and development	5,446		4,717
General and administrative	5,825		4,237
Merger, acquisition, and restructuring costs	143		1,944
Total stock-based compensation expense	$	19,287	$	16,589

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Lease Obligations (Tables)

3 Months Ended

Mar. 31, 2023

Leases [Abstract]

Schedule of Maturity of Lease Liabilities

The maturity of the Company's lease liabilities associated with leases included in the lease liability and ROU asset were as follows as of March 31, 2023 (in thousands):

Fiscal Year
Remaining 2023	$	19,311
2024	22,299
2025	14,487
2026	12,020
2027	7,431
Thereafter	21,011
Total lease payments (undiscounted)	96,559
Less: imputed interest	(14,091)
Lease liabilities—total (discounted)	$	82,468

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Commitment and Contingencies (Tables)

3 Months Ended

Mar. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Contractual Obligation, Fiscal Year Maturity

As of March 31, 2023, the Company's outstanding non-cancelable contractual obligations with a remaining term of one year or longer consist of the following (in thousands):

Fiscal Year
Remaining 2023	$	3,058
2024	6,953
2025	2,091
Total	$	12,102

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Debt (Tables)

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt

Long term debt as of March 31, 2023 and December 31, 2022 consisted of the following:

	March 31, 2023		December 31, 2022
	(in thousands)
Convertible Senior Notes	$	349,750	$	400,000
Less: Unamortized debt issuance cost	(5,931)		(7,355)
Net	343,819		392,645
Term Loan B Facility	353,700		354,600
Less: Unamortized discount and debt issuance cost	(19,883)		(20,888)
Net	333,817		333,712
Less: Current portion	(3,600)		(3,600)
Total non-current debt	$	674,036	$	722,757

Schedule of Maturities of Long-term Debt

Maturities of the principal amount of the Company's long-term debt as of March 31, 2023 are as follows (in thousands):

Fiscal Year
Remaining 2023	2,700
2024	3,600
2025	3,600
2026	353,350
2027	3,600
Thereafter	336,600
Total	$	703,450

Amortization expense for the Company's debt issuance costs related to the Convertible Senior Notes for the fiscal years 2023 through 2026 is as follows (in thousands):

Fiscal Year	Debt Issuance Costs
Remaining 2023	1,499
2024	2,001
2025	2,001
2026	430
Total	$	5,931

Amortization expense for the Term Loan B Facility debt discount and debt issuance costs for fiscal years 2023 through 2028 is as follows (in thousands):

Fiscal Year	Debt Discount		Debt Issuance Costs
Remaining 2023	$	1,171	$	1,829
2024	1,548		2,416
2025	1,532		2,391
2026	1,516		2,366
2027	1,500		2,341
Thereafter	498		775
Total	$	7,765	$	12,118

Interest Income and Interest Expense Disclosure

The following table sets forth interest expense related to the Convertible Senior Notes for the three months ended March 31, 2023 and 2022 (in thousands, except interest rates):

	Three Months Ended
	March 31, 2023			March 31, 2022
Contractual interest expense	$	241		$	250
Amortization of debt issuance costs	551			572
Total interest expense	$	792		$	822
Effective interest rate	0.82		%	0.82		%

The following table sets forth interest expense related to the Term Loan B Facility for the three months ended March 31, 2023 and 2022 (in thousands, except interest rates):

	Three Months Ended
	March 31, 2023			March 31, 2022
Contractual interest expense	$	8,436		$	5,163
Amortization of debt discount	393			397
Amortization of debt issuance costs	612			619
Total interest expense	$	9,441		$	6,179
Effective interest rate	10.65		%	6.98		%

Schedule of Debt

The following table summarizes the amount outstanding under the Term Loan B Facility at March 31, 2023 and December 31, 2022:

	March 31, 2023		December 31, 2022
	(in thousands)
Term Loan B Facility	$	353,700	$	354,600
Unamortized debt discounts	(7,765)		(8,158)
Unamortized debt issuance costs	(12,118)		(12,730)
Debt, net of debt issuance costs	$	333,817	$	333,712

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Net Loss Per Share - Basic and Diluted Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net loss	$ (98,732)	$ (44,593)
Weighted-average common shares outstanding, basic (in shares)	134,667	132,236
Weighted average number of shares outstanding, diluted (in shares)	134,667	132,236
Basic loss per share (in dollars per share)	$ (0.73)	$ (0.34)
Diluted loss per share (in dollars per share)	$ (0.73)	$ (0.34)

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Net Loss Per Share - Shares Excluded From Calculation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share (in shares)	9,658	11,422
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share (in shares)	1,742	2,593
Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share (in shares)	1,738	2,415
Unvested performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share (in shares)	135	152
ESPP shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share (in shares)	17	0
Convertible Senior Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share (in shares)	6,026	6,262

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Net Loss Per Share - Narrative (Details) - share	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Convertible Senior Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares issuable assuming conversion	5,474,952	6,261,560
Unvested performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Performance measurement percentage	100.00%
Performance Shares, Granted in 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Performance measurement percentage	94.00%	121.00%
Performance Shares, Granted in 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Performance measurement percentage	0.00%	0.00%
Performance Shares, Granted in 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Performance measurement percentage	54.00%	51.00%
Performance Shares, Granted in 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Performance measurement percentage	29.00%

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Revenue - Revenue Recognized on a Gross and Net Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 130,150	$ 118,075
Net basis
Disaggregation of Revenue [Line Items]
Revenue	107,457	100,076
Gross basis
Disaggregation of Revenue [Line Items]
Revenue	$ 22,693	$ 17,999
Revenue Benchmark | Concentration of Basis of Revenue Recognition
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%
Revenue Benchmark | Concentration of Basis of Revenue Recognition | Net basis
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	83.00%	85.00%
Revenue Benchmark | Concentration of Basis of Revenue Recognition | Gross basis
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	17.00%	15.00%

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Revenue - Revenue Disaggregated by Sales Distribution Channel (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 130,150	$ 118,075
CTV
Disaggregation of Revenue [Line Items]
Revenue	59,050	51,440
Mobile
Disaggregation of Revenue [Line Items]
Revenue	48,184	39,029
Desktop
Disaggregation of Revenue [Line Items]
Revenue	$ 22,916	$ 27,606
Product Concentration Risk | Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%
Product Concentration Risk | Revenue Benchmark | CTV
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	45.00%	44.00%
Product Concentration Risk | Revenue Benchmark | Mobile
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	37.00%	33.00%
Product Concentration Risk | Revenue Benchmark | Desktop
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	18.00%	23.00%

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Revenue - Revenue Disaggregated by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 130,150	$ 118,075
United States
Disaggregation of Revenue [Line Items]
Revenue	97,156	90,408
International
Disaggregation of Revenue [Line Items]
Revenue	$ 32,994	$ 27,667

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Revenue - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Payment terms in days (or less)	75 days
Accounts receivable, allowance for credit loss	$ 1,662	$ 2,096	$ 1,092	$ 3,475
Contra seller payable	1,100		$ 600
Decrease in provision for expected credit losses	(586)	1,466
Increase (decrease) in contra seller payable	500	(900)
Provision for doubtful accounts	$ 67	$ (571)

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Revenue - Schedule of Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, beginning balance	$ 1,092	$ 3,475
Write-offs	(16)	0
Increase (decrease) in provision for expected credit losses	586	(1,466)
Recoveries of previous write-offs	0	87
Allowance for doubtful accounts, ending balance	$ 1,662	$ 2,096

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Fair Value Measurements - Financial Instruments (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 22,636	$ 259,647
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	22,636	259,647
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Significant Unobservable Inputs  (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 0	$ 0

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Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Secured Debt | Term Loan B Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term loan fair value	$ 341,300	$ 333,300
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	22,636	259,647
Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Convertible notes	$ 282,400	$ 305,000

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Other Balance Sheet Amounts - Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable—seller	$ 913,047	$ 1,057,556
Accounts payable—trade	21,725	19,387
Accrued employee-related payables	15,633	15,065
Accrued holdback - indemnification claims	0	2,313
Total	$ 950,405	$ 1,094,321

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Goodwill, Intangible Assets, Internal Use Software Development Costs, and Capitalized Costs Incurred in Cloud Computing Arrangements - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 978,217		$ 978,217
Amortization expense of intangible assets	86,400	$ 38,500
Restructuring Impairments, Settled Without Cash	$ 0	$ 3,320
Basic (in dollars per share)	$ (0.73)	$ (0.34)
Diluted (in dollars per share)	$ (0.73)	$ (0.34)
Computer Software, Intangible Asset
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 0	$ 0
Scenario, Adjustment | Intangible Assets, Amortization Period
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 52,100
Basic (in dollars per share)	$ 0.38
Diluted (in dollars per share)	0.38
Scenario, Adjustment | Capitalized Software Projects, Estimated Useful Life
Acquired Finite-Lived Intangible Assets [Line Items]
Basic (in dollars per share)	0.01
Diluted (in dollars per share)	$ 0.01
Capitalized computer software, amortization	$ 1,100
Prepaid Expenses and Other Current Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Capitalized cloud computing software, net	700		700
Other Noncurrent Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Capitalized cloud computing software, net	$ 400		$ 500

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Goodwill, Intangible Assets, Internal Use Software Development Costs, and Capitalized Costs Incurred in Cloud Computing Arrangements - Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets, gross	$ 540,666	$ 540,666
Total accumulated amortization—intangible assets	(373,594)	(287,165)
Total	167,072	253,501
Developed technology
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets, gross	390,136	390,136
Total accumulated amortization—intangible assets	(254,521)	(184,439)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets, gross	136,000	136,000
Total accumulated amortization—intangible assets	(111,984)	(97,316)
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets, gross	12,730	12,730
Total accumulated amortization—intangible assets	(5,889)	(4,398)
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets, gross	900	900
Total accumulated amortization—intangible assets	(675)	(562)
Trademarks
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets, gross	900	900
Total accumulated amortization—intangible assets	$ (525)	$ (450)

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Goodwill, Intangible Assets, Internal Use Software Development Costs, and Capitalized Costs Incurred in Cloud Computing Arrangements - Finite-Lived Intangible Assets, Future Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fiscal Year
Remaining 2023	$ 116,061
2024	30,134
2025	14,445
2026	6,001
2027	431
Total	$ 167,072	$ 253,501

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Business Combinations - Narrative (Details) - Carbon (AI) Limited and Mode Technologies, Inc. - USD ($) $ in Millions	1 Months Ended
	Feb. 28, 2022	Feb. 28, 2023
Business Acquisition [Line Items]
Purchase price	$ 23.1
Business combination, contingent consideration, liability		$ 2.3

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Merger, Acquisition, and Restructuring Costs - Merger and Restructuring Cost Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Restructuring Cost and Reserve [Line Items]
Loss contracts (facilities related)	$ 2,190	$ 0
Impairment of property and equipment, net	506	0
Non-cash stock-based compensation (double-trigger acceleration and severance)	143	1,944
Impairment costs of abandoned technology	0	3,320
Professional services (investment banking advisory, legal and other professional services)	0	775
Total merger, acquisition, and restructuring costs	7,465	6,756
Personnel related (severance and one-time termination benefit costs)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,218	717
Exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,408	$ 0

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Merger, Acquisition, and Restructuring Costs - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Business Acquisition [Line Items]
Acquisition related costs	$ 7,465	$ 6,756
SpotX and Telaria
Business Acquisition [Line Items]
Accrued merger, acquisition, and restructuring costs	$ 2,805		$ 1,222

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Merger, Acquisition, and Restructuring Costs - Accrued Merger and Restructuring Cost Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Restructuring Reserve [Roll Forward]
Impairment of property and equipment, net	$ 506	$ 0
Non-cash impairments	0	(3,320)
Non-cash stock-based compensation	(143)	$ (1,944)
SpotX and Telaria
Restructuring Reserve [Roll Forward]
Accrued restructuring costs at December 31, 2022	1,222
Personnel related and non-cash stock-based compensation	3,361
Loss contracts (facilities related)	2,190
Exit costs	1,408
Impairment of property and equipment, net	506
Cash paid for restructuring costs	(3,043)
Non-cash loss contracts (facilities related)	(2,190)
Non-cash impairments	(506)
Non-cash stock-based compensation	(143)
Accrued restructuring costs at March 31, 2023	$ 2,805

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Stock-Based Compensation - Stock Options Outstanding (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares
Shares Under Option
Beginning balance (in shares) | shares	4,672
Granted (in shares) | shares	130
Exercised (in shares) | shares	(303)
Expired (in shares) | shares	(24)
Ending balance (in shares) | shares	4,475
Exercisable (in shares) | shares	3,551
Weighted- Average Exercise Price
Beginning balance (usd per share) | $ / shares	$ 8.71
Granted (usd per share) | $ / shares	10.59
Exercised (usd per share) | $ / shares	4.91
Expired (usd per share) | $ / shares	35.81
Ending balance (usd per share) | $ / shares	8.88
Exercisable (usd per share) | $ / shares	$ 7.39
Weighted- Average Contractual Life
Outstanding	5 years 9 months 18 days
Exercisable	5 years 2 months 12 days
Aggregate Intrinsic Value
Outstanding | $	$ 13,756
Exercisable | $	$ 12,905

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Stock-Based Compensation - Stock Options Narrative (Details) - Stock Option $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares
Number of Shares
Intrinsic values of options exercised	$ 1.7
Unrecognized employee stock-based compensation	$ 8.3
Unrecognized employee stock-based compensation, period for recognition	2 years 4 months 24 days
Fair value of options vested in period	$ 2.2
Grant date fair value of options granted (usd per share) | $ / shares	$ 7.27

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Stock-Based Compensation - Valuation Assumptions (Details) - Stock Option	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	5 years	5 years
Risk-free interest rate	3.99%	1.63%
Expected volatility	84.00%	79.00%
Dividend yield	0.00%	0.00%

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Stock-Based Compensation - Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs)	3 Months Ended
	Mar. 31, 2023 $ / shares shares
Number of Shares
Beginning balance (in shares)	14,138,000
Granted (in shares)	6,793,000
Canceled and Forfeited (in shares)	(826,000)
Vested and released (in shares)	(1,829,000)
Ending balance (in shares)	10,000,000
Restricted stock units outstanding and unvested (in shares)	14,120,000
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 15.06
Granted (in dollars per share) | $ / shares	10.72
Canceled (in dollars per share) | $ / shares	13.66
Vested and released (in dollars per share) | $ / shares	14.01
Ending balance (in dollars per share) | $ / shares	13.19
Restricted stock units outstanding and unvested (in dollars per share) | $ / shares	$ 13.20
Vested but deferred (in shares)	18,436

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Stock-Based Compensation - Restricted Stock Units Narrative (Details) - Restricted Stock Units (RSUs) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in dollars per share) | $ / shares	$ 10.72
Fair value of restricted stock vested	$ 23.5
Intrinsic value of nonvested unit	130.7
Unrecognized employee stock-based compensation	$ 167.0
Unrecognized employee stock-based compensation, period for recognition	3 years 1 month 6 days

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Stock-Based Compensation - Performance Stock Units Narrative (Details) - Performance Shares Units $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Aug. 31, 2021	Mar. 31, 2023 USD ($) tranche project $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance measurement percentage		100.00%
Unrecognized employee stock-based compensation | $		$ 12.0
Unrecognized employee stock-based compensation, period for recognition		2 years 10 months 24 days
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Number of tranches | tranche		3
Trailing consecutive trading day performance period | project		60
Tranche one | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Vesting, stock price trigger (in dollars per share)		$ 60.00
Tranche two | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Vesting, stock price trigger (in dollars per share)		80.00
Tranche three | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
Vesting, stock price trigger (in dollars per share)		$ 100.00
Minimum | Tranche four | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage		0.00%
Maximum | Tranche four | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage		150.00%

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Stock-Based Compensation - Performance Stock Units Activity (Details) - Unvested performance stock units shares in Thousands	3 Months Ended
	Mar. 31, 2023 $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	639
Granted (in shares) | shares	474
Ending balance (in shares) | shares	1,113
Weighted-Average Grant Date Fair Value
Beginning balance, nonvested (in dollars per share) | $ / shares	$ 19.02
Granted (in dollars per share) | $ / shares	13.32
Ending balance, nonvested (in dollars per share) | $ / shares	$ 16.59

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Stock-Based Compensation - Weighted Average Assumptions (Details) - Unvested performance stock units - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	3 years	3 years
Risk-free interest rate	4.19%	1.39%
Expected volatility of Magnite	94.00%	84.00%
Expected volatility of selected peer companies	64.00%	63.00%
Expected correlation coefficients of Magnite	0.62%	0.56%
Expected correlation coefficients of selected peer companies	0.54%	0.52%
Dividend yield	$ 0	$ 0

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Stock-Based Compensation - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 19,287	$ 16,589
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	468	350
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	7,405	5,341
Technology and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	5,446	4,717
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	5,825	4,237
Merger, acquisition, and restructuring costs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 143	$ 1,944

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Stock-Based Compensation - Stock Based Compensation Expense Narrative (Details)	3 Months Ended
	Mar. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved (in shares)	14,781,139
Annual percentage increase	5.00%
2014 Employee Stock Purchase Plan | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved (in shares)	5,169,575
Annual percentage increase	1.00%

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Benefit for income taxes	$ 309	$ 2,005

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Lease Obligations - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Lease expense	$ 6.5	$ 5.6
Short-term lease expense	0.2	0.3
Variable lease cost	0.9	0.5
Sublease income	$ 1.3	$ 1.3
Weighted average discount rate	6.13%		6.11%
Weighted average remaining lease term	5 years 6 months		5 years 7 months 6 days
Minimum
Lessee, Lease, Description [Line Items]
Term of lease contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Term of lease contract	10 years
Company Office, San Francisco CA
Lessee, Lease, Description [Line Items]
Operating lease not yet commenced, amount	$ 2.3
Operating lease not yet commenced, term of contract	10 years

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Lease Obligations - Schedule of Lease Liability Maturities (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Fiscal Year
Remaining 2023	$ 19,311
2024	22,299
2025	14,487
2026	12,020
2027	7,431
Thereafter	21,011
Total lease payments (undiscounted)	96,559
Less: imputed interest	(14,091)
Lease liabilities—total (discounted)	$ 82,468

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Commitments and Contingencies (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Non Cancelable Inventory And Other Services Purchase Commitments Member
Other Commitments [Line Items]
Non-cancelable purchase commitments	$ 42.0
Financial Standby Letter of Credit
Other Commitments [Line Items]
Letters of credit outstanding, amount	$ 5.3	$ 5.3

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Commitments and Contingencies - Contractual Obligations (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remaining 2023	$ 3,058
2024	6,953
2025	2,091
Total	$ 12,102

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Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total	$ 703,450
Less: Current portion	(3,600)	$ (3,600)
Total non-current debt	674,036	722,757
Convertible Senior Notes | Convertible Debt
Debt Instrument [Line Items]
Long-term debt, gross	349,750	400,000
Debt instrument, unamortized discount and debt issuance costs	(5,931)	(7,355)
Total	343,819	392,645
Term Loan B Facility | Secured Debt
Debt Instrument [Line Items]
Long-term debt, gross	353,700	354,600
Debt instrument, unamortized discount and debt issuance costs	(19,883)	(20,888)
Total	333,817	333,712
Total non-current debt	$ 333,817	$ 333,712

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Debt - Maturities of Principle Amount of Long-Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Debt Disclosure [Abstract]
Remaining 2023	$ 2,700
2024	3,600
2025	3,600
2026	353,350
2027	3,600
Thereafter	336,600
Total	703,450
Amortization of debt discount and issuance costs	1,600	$ 1,600
Amortization of deferred financing costs	$ 100	$ 100

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Debt - Convertible Senior Notes and Capped Call Transactions Narrative (Details)	1 Months Ended		3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2021 USD ($) day $ / shares	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Apr. 30, 2021 USD ($)
Debt Instrument [Line Items]
Capped calls, transaction costs		$ 39,000,000
Debt issuance costs, gross		11,400,000			$ 27,700,000
Repayments of convertible debt			$ 40,828,000	$ 0
Gain on extinguishment of debt			$ 8,549,000	$ 0
Convertible Senior Notes
Debt Instrument [Line Items]
Capped calls, transaction costs		$ 39,000,000
Percent of outstanding balance holders able to call debt in the event of default		25.00%
Convertible Senior Notes | Maximum
Debt Instrument [Line Items]
Conversion price (in USD per share) | $ / shares		$ 91.2600
Convertible Senior Notes | Minimum
Debt Instrument [Line Items]
Conversion price (in USD per share) | $ / shares		$ 63.8818
Convertible Senior Notes | Convertible Debt
Debt Instrument [Line Items]
Aggregate principle amount		$ 400,000,000
Interest rate		0.25%
Over-allotment options		$ 50,000,000
Net proceeds		$ 388,600,000
Conversion ratio			0.0156539
Repayments of convertible debt	$ 40,800,000
Gain on extinguishment of debt	8,500,000
Debt instrument, repurchased face amount	50,300,000		$ 50,300,000
Unamortized debt issuance costs associated with debt extinguishment	$ 900,000
Convertible Senior Notes | Convertible Debt | Maximum
Debt Instrument [Line Items]
Make-whole fundamental change period		45 days
Convertible Senior Notes | Convertible Debt | Minimum
Debt Instrument [Line Items]
Make-whole fundamental change period		20 days
Convertible Senior Notes | Convertible Debt | Conversion Term (i)
Debt Instrument [Line Items]
Threshold percent of stock price trigger		130.00%
Threshold trading days | day		20
Threshold consecutive trading days | day		30
Convertible Senior Notes | Convertible Debt | Conversion Term (ii)
Debt Instrument [Line Items]
Threshold percent of stock price trigger		98.00%
Threshold trading days | day		5
Threshold consecutive trading days | day		10
Convertible Senior Notes | Convertible Debt | Conversion Term (iv)
Debt Instrument [Line Items]
Threshold percent of stock price trigger		130.00%
Threshold trading days | day		20
Threshold consecutive trading days | day		30
Term Loan B Facility | Secured Debt
Debt Instrument [Line Items]
Aggregate principle amount					$ 360,000,000
Interest rate	9.91%		9.91%

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Debt - Interest Expense Related to the Convertible Senior Notes (Details) - Convertible Debt - Convertible Senior Notes - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Debt Instrument [Line Items]
Contractual interest expense	$ 241	$ 250
Amortization of debt issuance costs	551	572
Total interest expense	$ 792	$ 822
Effective interest rate	0.82%	0.82%

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Debt - Amortization Expense for Debt Issuance Costs (Details) - Convertible Debt - Convertible Senior Notes $ in Thousands	Mar. 31, 2023 USD ($)
Debt Issuance Costs
Remaining 2023	$ 1,499
2024	2,001
2025	2,001
2026	430
Total	$ 5,931

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Debt - Credit Agreement Narrative (Details) - USD ($)	Apr. 30, 2021	Mar. 31, 2023	Jun. 28, 2021	Mar. 31, 2021
Line of Credit Facility [Line Items]
Debt issuance costs, gross	$ 27,700,000			$ 11,400,000
Term Loan B Facility | Secured Debt
Line of Credit Facility [Line Items]
Aggregate principle amount	$ 360,000,000
Long-term debt, term	7 years
Net proceeds	$ 325,000,000
Interest rate		9.91%
Term Loan B Facility | Secured Debt | Debt Discount
Line of Credit Facility [Line Items]
Debt issuance costs, gross	10,800,000
Term Loan B Facility | Secured Debt | Deferred Financing Costs
Line of Credit Facility [Line Items]
Debt issuance costs, gross	$ 16,900,000
Term Loan B Facility | Secured Debt | Eurodollar
Line of Credit Facility [Line Items]
Variable interest rate	5.00%
Term Loan B Facility | Secured Debt | Alternate Base Rate
Line of Credit Facility [Line Items]
Variable interest rate	4.00%
Senior Secured Revolving Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt utilization triggering leverage ratio compliance, percent	35.00%
Leverage ratio maximum	3.25
Debt instrument, maturity trigger, outstanding, period prior to maturity date		91 days
Available borrowing capacity		$ 59,700,000
Senior Secured Revolving Credit Facility | Letter of Credit
Line of Credit Facility [Line Items]
Letters of credit outstanding, amount		$ 5,300,000
Senior Secured Revolving Credit Facility | Eurodollar | Minimum | Revolving Credit Facility
Line of Credit Facility [Line Items]
Variable interest rate	4.25%
Senior Secured Revolving Credit Facility | Eurodollar | Maximum | Revolving Credit Facility
Line of Credit Facility [Line Items]
Variable interest rate	4.75%
Senior Secured Revolving Credit Facility | Alternate Base Rate | Minimum | Revolving Credit Facility
Line of Credit Facility [Line Items]
Variable interest rate	3.25%
Senior Secured Revolving Credit Facility | Alternate Base Rate | Maximum | Revolving Credit Facility
Line of Credit Facility [Line Items]
Variable interest rate	3.75%
Senior Secured Revolving Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 52,500,000		$ 65,000,000
Quarterly payments of principle balance (percent)	0.25%
Aggregate annual payments of principle balance (percent)	1.00%
Incremental Revolver | Revolving Credit Facility
Line of Credit Facility [Line Items]
Increase in maximum borrowing capacity			12,500,000
Incremental Revolver | Letter of Credit
Line of Credit Facility [Line Items]
Increase in maximum borrowing capacity			$ 5,000,000

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Debt - Summary of Term Loan B Facility (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Debt, net of debt issuance costs	$ 674,036	$ 722,757
Secured Debt | Term Loan B Facility
Debt Instrument [Line Items]
Term Loan B Facility	353,700	354,600
Unamortized debt discounts	(7,765)	(8,158)
Unamortized debt issuance costs	(12,118)	(12,730)
Debt, net of debt issuance costs	$ 333,817	$ 333,712

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Debt - Interest Expense Related to the Term Loan B Facility (Details) - Secured Debt - Term Loan B Facility - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Debt Instrument [Line Items]
Contractual interest expense	$ 8,436	$ 5,163
Amortization of debt discount	393	397
Amortization of debt issuance costs	612	619
Total interest expense	$ 9,441	$ 6,179
Effective interest rate	10.65%	6.98%

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Debt - Amortization Expense for the Term Loan B Facility Debt Discount and Issuance Costs (Details) - Secured Debt - Term Loan B Facility - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Discount
Remaining 2023	$ 1,171
2024	1,548
2025	1,532
2026	1,516
2027	1,500
Thereafter	498
Total	7,765	$ 8,158
Debt Issuance Costs
Remaining 2023	1,829
2024	2,416
2025	2,391
2026	2,366
2026	2,341
Thereafter	775
Total	$ 12,118	$ 12,730