InterDigital (IDCC) 10-Q 31 Oct 24 2024 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2024	Oct. 29, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	1-33579
Entity Registrant Name	INTERDIGITAL, INC.
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	82-4936666
Entity Address, Address Line One	200 Bellevue Parkway
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Wilmington
Entity Address, State or Province	DE
Entity Address, Postal Zip Code	19809-3727
City Area Code	302
Local Phone Number	281-3600
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	IDCC
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		25,343,734
Entity Central Index Key	0001405495
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 401,090	$ 437,076
Short-term investments	412,120	569,280
Accounts receivable	212,420	117,292
Prepaid and other current assets	128,106	43,976
Total current assets	1,153,736	1,167,624
Property and equipment, net	10,872	11,566
Patents, net	299,567	313,001
Deferred tax assets	110,739	128,967
Other non-current assets, net	150,436	149,656
Total assets	1,725,350	1,770,814
Current liabilities:
Current portion of long-term debt	454,250	578,752
Accounts payable	8,015	7,846
Accrued compensation and related expenses	38,966	32,665
Deferred revenue	156,885	153,597
Dividends payable	11,366	10,226
Other accrued expenses	42,289	98,042
Total current liabilities	711,771	881,128
Long-term debt	18,302	29,019
Long-term deferred revenue	216,665	223,866
Other long-term liabilities	56,075	55,252
Total liabilities	1,002,813	1,189,265
Commitments and contingencies
Shareholders' equity:
Preferred Stock, $0.10 par value, 14,399 shares authorized, 0 shares issued and outstanding	0	0
Common Stock, $0.01 par value, 100,000 shares authorized, 70,137 and 69,507 shares issued and 25,242 and 25,580 shares outstanding	701	694
Additional paid-in capital	794,644	742,981
Retained earnings	1,654,774	1,462,070
Accumulated other comprehensive gain (loss)	134	(647)
Treasury stock, 44,895 and 43,927 shares of common stock held at cost	(1,727,716)	(1,623,549)
Total shareholders' equity	722,537	581,549
Total liabilities and shareholders' equity	$ 1,725,350	$ 1,770,814

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2024	Dec. 31, 2023
Shareholders' equity:
Preferred stock, par value (in USD per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares)	14,399,000	14,399,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	70,137,000	69,507,000
Common stock, shares outstanding (in shares)	25,242,000	25,580,000
Treasury stock, shares of common held at cost (in shares)	44,895,000	43,927,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues
Revenues	$ 128,679	$ 140,106	$ 615,714	$ 444,070
Operating expenses:
Research and portfolio development	48,331	50,253	147,851	149,560
Licensing	27,467	21,522	149,212	59,534
General and administrative	13,539	14,678	41,665	38,686
Total operating expenses	89,337	86,453	338,728	247,780
Income from operations	39,342	53,653	276,986	196,290
Interest expense	(10,681)	(12,683)	(34,086)	(36,911)
Other income, net	12,554	14,725	33,483	42,303
Income before income taxes	41,215	55,695	276,383	201,682
Income tax provision	(7,025)	(8,541)	(50,877)	(29,715)
Net income	34,190	47,154	225,506	171,967
Net loss attributable to noncontrolling interest	0	(787)	0	(3,016)
Net income attributable to InterDigital, Inc.	$ 34,190	$ 47,941	$ 225,506	$ 174,983
Net income per common share — Basic (in USD per share)	$ 1.36	$ 1.82	$ 8.92	$ 6.42
Weighted average number of common shares outstanding — Basic (in shares)	25,149	26,285	25,286	27,259
Net income per common share — Diluted (in USD per share)	$ 1.14	$ 1.72	$ 7.84	$ 6.19
Weighted average number of common shares outstanding — Diluted (in shares)	30,034	27,812	28,759	28,261
Cash dividends declared per common share (in USD per share)	$ 0.45	$ 0.40	$ 1.25	$ 1.10

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 34,190	$ 47,154	$ 225,506	$ 171,967
Unrealized gain (loss) on investments, net of tax	1,366	30	781	(1,230)
Comprehensive income	35,556	47,184	226,287	170,737
Comprehensive loss attributable to noncontrolling interest	0	(787)	0	(3,016)
Total comprehensive income attributable to InterDigital, Inc.	$ 35,556	$ 47,971	$ 226,287	$ 173,753

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Gain (Loss)	Treasury Stock	Non-Controlling Interest
Beginning balance (in shares) at Dec. 31, 2022		71,923
Beginning balance (in shares) at Dec. 31, 2022						42,255
Beginning balance at Dec. 31, 2022	$ 730,513	$ 719	$ 717,102	$ 1,492,046	$ (916)	$ (1,484,056)	$ 5,618
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	105,259			105,259
Net loss attributable to noncontrolling interest	(1,739)						(1,739)
Non-controlling interest contributions	1,750						1,750
Net change in unrealized gain (loss) on short-term investments	579				579
Dividends declared	(9,449)		259	(9,708)
Exercise of common stock options (in shares)		13
Exercise of common stock options	687		687
Issuance of common stock, net (in shares)		132
Issuance of common stock, net	(6,708)	$ 1	(6,709)
Share-based compensation	7,790		7,790
Repurchase of common stock (in shares)		(2,739)
Repurchase of common stock	(203,381)	$ (27)		(203,354)
Ending balance (in shares) at Mar. 31, 2023		69,329
Ending balance (in shares) at Mar. 31, 2023						42,255
Ending balance at Mar. 31, 2023	625,301	$ 693	719,129	1,384,243	(337)	$ (1,484,056)	5,629
Beginning balance (in shares) at Dec. 31, 2022		71,923
Beginning balance (in shares) at Dec. 31, 2022						42,255
Beginning balance at Dec. 31, 2022	730,513	$ 719	717,102	1,492,046	(916)	$ (1,484,056)	5,618
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	174,983
Net loss attributable to noncontrolling interest	(3,016)
Net change in unrealized gain (loss) on short-term investments	(1,230)
Ending balance (in shares) at Sep. 30, 2023		69,431
Ending balance (in shares) at Sep. 30, 2023						43,456
Ending balance at Sep. 30, 2023	587,782	$ 694	734,627	1,433,658	(2,146)	$ (1,583,403)	4,352
Beginning balance (in shares) at Mar. 31, 2023		69,329
Beginning balance (in shares) at Mar. 31, 2023						42,255
Beginning balance at Mar. 31, 2023	625,301	$ 693	719,129	1,384,243	(337)	$ (1,484,056)	5,629
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	21,783			21,783
Net loss attributable to noncontrolling interest	(490)						(490)
Net change in unrealized gain (loss) on short-term investments	(1,839)				(1,839)
Dividends declared	(9,273)		360	(9,633)
Exercise of common stock options (in shares)		1
Exercise of common stock options	12		12
Issuance of common stock, net (in shares)		42
Issuance of common stock, net	(1,389)		(1,389)
Share-based compensation	8,740		8,740
Repurchase of common stock (in shares)						(548)
Repurchase of common stock	(42,489)					$ (42,489)
Ending balance (in shares) at Jun. 30, 2023		69,372
Ending balance (in shares) at Jun. 30, 2023						42,803
Ending balance at Jun. 30, 2023	600,356	$ 693	726,852	1,396,393	(2,176)	$ (1,526,545)	5,139
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	47,941			47,941
Net loss attributable to noncontrolling interest	(787)						(787)
Net change in unrealized gain (loss) on short-term investments	30				30
Dividends declared	(10,348)		328	(10,676)
Issuance of common stock, net (in shares)		59
Issuance of common stock, net	(2,887)	$ 1	(2,888)
Share-based compensation	10,335		10,335
Repurchase of common stock (in shares)						(653)
Repurchase of common stock	(56,858)					$ (56,858)
Ending balance (in shares) at Sep. 30, 2023		69,431
Ending balance (in shares) at Sep. 30, 2023						43,456
Ending balance at Sep. 30, 2023	$ 587,782	$ 694	734,627	1,433,658	(2,146)	$ (1,583,403)	4,352
Beginning balance (in shares) at Dec. 31, 2023	25,580	69,507
Beginning balance (in shares) at Dec. 31, 2023	43,927					43,927
Beginning balance at Dec. 31, 2023	$ 581,549	$ 694	742,981	1,462,070	(647)	$ (1,623,549)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	81,652			81,652
Net change in unrealized gain (loss) on short-term investments	(495)				(495)
Dividends declared	(10,147)		343	(10,490)
Issuance of common stock, net (in shares)		131
Issuance of common stock, net	(8,635)	$ 2	(8,637)
Share-based compensation	9,386		9,386
Repurchase of common stock (in shares)						(277)
Repurchase of common stock	(29,019)					$ (29,019)
Ending balance (in shares) at Mar. 31, 2024		69,638
Ending balance (in shares) at Mar. 31, 2024						44,204
Ending balance at Mar. 31, 2024	$ 624,291	$ 696	744,073	1,533,232	(1,142)	$ (1,652,568)	0
Beginning balance (in shares) at Dec. 31, 2023	25,580	69,507
Beginning balance (in shares) at Dec. 31, 2023	43,927					43,927
Beginning balance at Dec. 31, 2023	$ 581,549	$ 694	742,981	1,462,070	(647)	$ (1,623,549)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	225,506
Net loss attributable to noncontrolling interest	0
Net change in unrealized gain (loss) on short-term investments	$ 781
Ending balance (in shares) at Sep. 30, 2024	25,242	70,137
Ending balance (in shares) at Sep. 30, 2024	44,895					44,895
Ending balance at Sep. 30, 2024	$ 722,537	$ 701	794,644	1,654,774	134	$ (1,727,716)	0
Beginning balance (in shares) at Mar. 31, 2024		69,638
Beginning balance (in shares) at Mar. 31, 2024						44,204
Beginning balance at Mar. 31, 2024	624,291	$ 696	744,073	1,533,232	(1,142)	$ (1,652,568)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	109,664			109,664
Net change in unrealized gain (loss) on short-term investments	(90)				(90)
Dividends declared	(10,052)		443	(10,495)
Issuance of common stock, net (in shares)		39
Issuance of common stock, net	(1,580)		(1,580)
Share-based compensation	9,655		9,655
Repurchase of common stock (in shares)						(344)
Repurchase of common stock	(35,111)					$ (35,111)
Settlement of the 2024 Notes (in shares)		324
Settlement of the 2024 Notes	0	$ 3	(3)
Settlement of the 2024 Hedges (in shares)						324
Settlement of the 2024 Hedges	0		37,120			$ (37,120)
Ending balance (in shares) at Jun. 30, 2024		70,001
Ending balance (in shares) at Jun. 30, 2024						44,872
Ending balance at Jun. 30, 2024	696,777	$ 699	789,708	1,632,401	(1,232)	$ (1,724,799)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to InterDigital, Inc.	34,190			34,190
Net loss attributable to noncontrolling interest	0
Net change in unrealized gain (loss) on short-term investments	1,366				1,366
Dividends declared	(11,366)		451	(11,817)
Exercise of common stock options (in shares)		1
Exercise of common stock options	11		11
Issuance of common stock, net (in shares)		53
Issuance of common stock, net	(4,601)	$ 1	(4,602)
Share-based compensation	9,081		9,081
Repurchase of common stock (in shares)						(23)
Repurchase of common stock	(2,917)					$ (2,917)
Settlement of the 2024 Warrants (in shares)		82
Settlement of the 2024 Warrants	$ (4)	$ 1	(5)
Ending balance (in shares) at Sep. 30, 2024	25,242	70,137
Ending balance (in shares) at Sep. 30, 2024	44,895					44,895
Ending balance at Sep. 30, 2024	$ 722,537	$ 701	$ 794,644	$ 1,654,774	$ 134	$ (1,727,716)	$ 0

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Stockholders' Equity [Abstract]
Dividends declared (in USD per share)	$ 0.45	$ 0.40	$ 0.40	$ 0.40	$ 0.35	$ 0.35	$ 1.25	$ 1.10

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income	$ 225,506	$ 171,967
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	52,165	58,698
Non-cash interest income, net	(8,290)	(9,800)
Non-cash change in investments	329	(9,370)
Change in deferred revenue	(3,913)	(3,933)
Deferred income taxes	18,020	2,635
Share-based compensation	28,122	26,865
Other	0	2,616
Increase in assets:
Receivables	(95,128)	(16,390)
Deferred charges and other assets	(81,333)	(54,384)
(Decrease) Increase in liabilities:
Accounts payable	(2,092)	881
Customer deposit	(76,100)	76,100
Accrued compensation and other expenses	22,208	(8,567)
Net cash provided by operating activities	79,494	237,318
Cash flows from investing activities:
Purchases of short-term investments	(445,434)	(671,612)
Sales of short-term investments	618,642	627,906
Purchases of property and equipment	(1,928)	(3,167)
Capitalized patent costs	(33,506)	(27,992)
Long-term investments	1,576	567
Net cash provided by (used in) investing activities	139,350	(74,298)
Cash flows from financing activities:
Payments on long-term debt	(139,069)	0
Payments of debt issuance costs	0	(100)
Repurchase of common stock	(66,726)	(302,728)
Net proceeds from exercise of stock options	11	699
Non-controlling interest contribution	0	1,750
Taxes withheld upon restricted stock unit vestings	(14,816)	(10,984)
Dividends paid	(30,425)	(29,106)
Net cash used in financing activities	(251,025)	(340,469)
Net decrease in cash, cash equivalents and restricted cash	(32,181)	(177,449)
Cash, cash equivalents and restricted cash, beginning of period	442,961	703,161
Cash, cash equivalents and restricted cash, end of period	$ 410,780	$ 525,712

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION In the opinion of management, the accompanying unaudited, condensed consolidated financial statements contain all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the financial position of InterDigital, Inc. (individually and/or collectively with its subsidiaries referred to as “InterDigital,” the “Company,” “we,” “us” or “our,” unless otherwise indicated) as of September 30, 2024, the results of our operations for the three and nine months ended September 30, 2024 and 2023 and our cash flows for the nine months ended September 30, 2024 and 2023. The accompanying unaudited, condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, accordingly, do not include all of the detailed schedules, information and notes necessary to state fairly the financial condition, results of operations and cash flows in conformity with United States generally accepted accounting principles (“GAAP”). The year-end condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP for year-end financial statements. Therefore, these financial statements should be read in conjunction with the financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (our “2023 Form 10-K”) as filed with the Securities and Exchange Commission (“SEC”) on February 15, 2024. Definitions of capitalized terms not defined herein appear within our 2023 Form 10-K. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year. We have one reportable segment. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. Change in Accounting Policies There have been no material changes or updates to our existing accounting policies from the disclosures included in our 2023 Form 10-K, except as indicated below in " New Accounting Guidance ". Reclassifications Certain reclassifications have been made to prior year amounts to conform to the current year presentation. Supplemental Cash Flow Information The following table presents additional supplemental cash flow information for the nine months ended September 30, 2024 and 2023 (in thousands): Nine Months Ended September 30, Supplemental cash flow information: 2024 2023 Interest paid $ 9,311 $ 9,312 Income taxes paid, including foreign withholding taxes 37,269 30,117 Non-cash investing and financing activities: Settlement of the 2024 Hedge Transactions 37,120 — Dividend payable 11,366 10,348 Right-of-use assets obtained in exchange of operating lease liabilities 2,023 93 Accrued capitalized patent costs and property and equipment purchases (2,261) 334 Unsettled repurchase of common stock — 1,853 New Accounting Guidance Accounting Standards Update: Improvements to Reportable Segment Disclosure s In November 2023, the FASB issued ASU No. 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures”. The amendments in the ASU require disclosures to include significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”), a description of other segment items by reportable segment, and any additional measures of a segment's profit or loss used by the CODM when deciding how to allocate resources. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption allowed. We are currently evaluating the impact of adoption on our financial disclosures. Accounting Standards Update: Improvements to Income Tax Disclosures In December 2023, the FASB issued ASU No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures”. The amendments in the ASU enhance income tax disclosures, primarily through standardization, disaggregation of rate reconciliation categories, and income taxes paid by jurisdiction. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, with early adoption allowed. We are currently evaluating the impact of adoption on our financial disclosures.

Revenue

Revenue	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
REVENUE	REVENUE Disaggregated Revenue The following table presents the disaggregation of our revenue for the three and nine months ended September 30, 2024 and 2023 (in thousands): Three Months Ended September 30, 2024 2023 Increase/(Decrease) Recurring revenues: Smartphone $ 74,184 $ 88,376 $ (14,192) (16) % CE, IoT/Auto 23,830 15,659 8,171 52 % Other 620 441 179 41 % Total recurring revenues 98,634 104,476 (5,842) (6) % Catch-up revenues a 30,045 35,630 (5,585) (16) % Total revenues $ 128,679 $ 140,106 $ (11,427) (8) % Nine Months Ended September 30, 2024 2023 Increase/(Decrease) Recurring revenues: Smartphone $ 221,738 $ 260,882 $ (39,144) (15) % CE, IoT/Auto 67,824 43,177 24,647 57 % Other 1,878 1,063 815 77 % Total recurring revenues 291,440 305,122 (13,682) (4) % Catch-up revenues a 324,274 138,948 185,326 133 % Total revenues $ 615,714 $ 444,070 $ 171,644 39 % (a) Catch-up revenues are comprised of past patent royalties and revenues from static fixed-fee agreements. During the nine months ended September 30, 2024, we recognized $119.8 million of revenue that had been included in deferred revenue as of the beginning of the period. As of September 30, 2024, we had contract assets of $161.1 million included within " Accounts receivable " in the condensed consolidated balance sheet. As of December 31, 2023, we had contract assets of $94.6 million included within " Accounts receivable " in the condensed consolidated balance sheet. Contracted Revenue Based on contracts signed and committed as of September 30, 2024, we expect to recognize the following revenue from dynamic fixed-fee royalty payments over the term of such contracts (in thousands): Revenue (a) Remainder of 2024 $ 84,979 2025 330,439 2026 237,275 2027 227,858 2028 215,821 Thereafter 265,882 Total Revenue $ 1,362,254 (a) This table includes estimated revenue related to our Samsung arbitration. In accordance with ASC 606, these estimates are limited to the amount of revenue we expect to recognize only to the extent it is probable that a subsequent change in the estimate would not result in a significant revenue reversal.

Cash, Concentration of Credit R

Cash, Concentration of Credit Risk and Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
CASH, CONCENTRATION OF CREDIT RISK AND FAIR VALUE OF FINANCIAL INSTRUMENTS	CASH, CONCENTRATION OF CREDIT RISK AND FAIR VALUE OF FINANCIAL INSTRUMENTS Cash, Cash Equivalents, and Restricted Cash Cash, cash equivalents, and restricted cash currently consist of money market and demand accounts. The following table provides a reconciliation of total cash, cash equivalents and restricted cash as of September 30, 2024, December 31, 2023 and September 30, 2023 to the captions within the condensed consolidated balance sheets and condensed consolidated statements of cash flows (in thousands): September 30, December 31, September 30, 2024 2023 2023 Cash and cash equivalents $ 401,090 $ 437,076 $ 518,483 Restricted cash included within prepaid and other current assets 9,690 5,885 7,229 Total cash, cash equivalents, and restricted cash $ 410,780 $ 442,961 $ 525,712 Concentration of Credit Risk and Fair Value of Financial Instruments Financial instruments that potentially subject us to concentration of credit risk consist primarily of cash equivalents, short-term investments, and accounts receivable. We place our cash equivalents and short-term investments only in highly rated financial instruments and in United States government instruments. Our accounts receivable and contract assets are derived principally from patent license and technology solutions agreements. Four licensees comprised 85% and 84% of our accounts receivable balances of September 30, 2024 and December 31, 2023, respectively. We perform ongoing credit evaluations of our licensees, who generally include large, multinational, wireless telecommunications equipment manufacturers. We believe that the book values of our financial instruments approximate their fair values. Fair Value Measurements We use various valuation techniques and assumptions when measuring the fair value of our assets and liabilities. We utilize market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. This guidance established a hierarchy that prioritizes fair value measurements based on the types of input used for the various valuation techniques (market approach, income approach and cost approach). The levels of the hierarchy are described below: Level 1 Inputs — Level 1 includes financial instruments for which quoted market prices for identical instruments are available in active markets. Level 2 Inputs — Level 2 includes financial instruments for which there are inputs other than quoted prices included within Level 1 that are observable for the instrument such as quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets with insufficient volume or infrequent transactions (less active markets) or model-driven valuations in which significant inputs are observable or can be derived principally from, or corroborated by, observable market data, including market interest rate curves, referenced credit spreads and pre-payment rates. Level 3 Inputs — Level 3 includes financial instruments for which fair value is derived from valuation techniques including pricing models and discounted cash flow models in which one or more significant inputs are unobservable, including the Company’s own assumptions. The pricing models incorporate transaction details such as contractual terms, maturity and, in certain instances, timing and amount of future cash flows, as well as assumptions related to liquidity and credit valuation adjustments of marketplace participants. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of financial assets and financial liabilities and their placement within the fair value hierarchy. We use quoted market prices for similar assets to estimate the fair value of our Level 2 investments. Recurring Fair Value Measurements Our financial assets are generally included within short-term investments on our condensed consolidated balance sheets, unless otherwise indicated. Our financial assets and liabilities that are accounted for at fair value on a recurring basis are presented in the tables below as of September 30, 2024 and December 31, 2023 (in thousands): Fair Value as of September 30, 2024 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 400,422 $ — $ — $ 400,422 Commercial paper — 95,932 — 95,932 U.S. government securities — 192,507 — 192,507 Corporate bonds, asset backed and other securities (c) — 134,039 — 134,039 Total $ 400,422 $ 422,478 $ — $ 822,900 Fair Value as of December 31, 2023 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 430,707 $ — $ — $ 430,707 Commercial paper (b) — 174,991 — 174,991 U.S. government securities — 256,850 — 256,850 Corporate bonds, asset backed and other securities (c) — 149,693 — 149,693 Total $ 430,707 $ 581,534 $ — $ 1,012,241 ______________________________ (a) Primarily included within cash and cash equivalents. (b) As of December 31, 2023, $5.7 million of commercial paper was included within cash and cash equivalents. (c) As of September 30, 2024 and December 31, 2023, $10.4 million and $6.5 million of corporate bonds, asset backed and other securities was included within cash and cash equivalents, respectively. Non-Recurring Fair Value Measurements Patents During the nine months ended September 30, 2023, we incurred a one-time impairment of $2.5 million on our patents held for sale. We determined the fair value based upon evaluation of market conditions. Investment in Other Entities During the three and nine months ended September 30, 2024, we recognized net gains of $0.3 million and $1.8 million, respectively, resulting from fair value changes of our long-term strategic investments, which was included within “ Other income, net ” in the condensed consolidated statement of income. During the three and nine months ended September 30, 2023, we recognized gains of $6.1 million and $9.4 million, respectively, resulting from fair value changes of one of our long-term strategic investments, which was included within “ Other income, net ” in the condensed consolidated statement of income. Fair Value of Long-Term Debt Convertible Notes The principal amount, carrying value and related estimated fair value of the Company's Convertible Notes reported as of September 30, 2024 and December 31, 2023 was as follows (in thousands). The aggregate fair value of the principal amount of the Convertible Notes is a Level 2 fair value measurement. September 30, 2024 December 31, 2023 Principal Carrying Fair Principal Carrying Fair 2027 Senior Convertible Long-Term Debt $ 460,000 $ 454,250 $ 855,554 $ 460,000 $ 452,830 $ 677,230 2024 Senior Convertible Long-Term Debt $ — $ — $ — $ 126,174 $ 125,922 $ 171,130 Technicolor Patent Acquisition Long-term Debt The carrying value and related estimated fair value of the Technicolor Patent Acquisition long-term debt reported as of September 30, 2024 and December 31, 2023 was as follows (in thousands). The aggregate fair value of the Technicolor Patent Acquisition long-term debt is a Level 3 fair value measurement. September 30, 2024 December 31, 2023 Carrying Fair Carrying Fair Technicolor Patent Acquisition Long-Term Debt $ 18,302 $ 16,584 $ 29,019 $ 28,859

Other Assets and Liabilities

Other Assets and Liabilities	9 Months Ended
	Sep. 30, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
OTHER ASSETS AND LIABILITIES	OTHER ASSETS AND LIABILITIES The amounts included in " Prepaid and other current assets " in the condensed consolidated balance sheet as of September 30, 2024 and December 31, 2023 were as follows (in thousands): September 30, 2024 December 31, 2023 Deposits $ 40,643 $ — Prepaid assets 35,019 9,353 Tax receivables 25,257 19,835 Restricted cash 9,690 5,885 Other current assets 17,497 8,903 Total Prepaid and other current assets $ 128,106 $ 43,976 The amounts included in " Other non-current assets, net " in the condensed consolidated balance sheet as of September 30, 2024 and December 31, 2023 were as follows (in thousands): September 30, 2024 December 31, 2023 Tax receivables $ 87,331 $ 76,740 Goodwill 22,421 22,421 Long-term investments 20,667 31,895 Right-of-use assets 15,840 15,746 Other non-current assets 4,177 2,854 Total Other non-current assets, net $ 150,436 $ 149,656 The amounts included in " Other accrued expenses " in the condensed consolidated balance sheet as of September 30, 2024 and December 31, 2023 were as follows (in thousands): September 30, 2024 December 31, 2023 Accrued legal fees $ 20,616 $ 10,338 Customer deposit — 76,100 Other accrued expenses 21,673 11,604 Total Other accrued expenses $ 42,289 $ 98,042 The amounts included in " Other long-term liabilities " in the condensed consolidated balance sheet as of September 30, 2024 and December 31, 2023 were as follows (in thousands): September 30, 2024 December 31, 2023 Deferred compensation liabilities $ 19,560 $ 18,413 Operating lease liabilities 16,819 17,385 Other long-term liabilities 19,696 19,454 Total Other long-term liabilities $ 56,075 $ 55,252

Obligations

Obligations	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
OBLIGATIONS	OBLIGATIONS 2027 Notes, and Related Note Hedge and Warrant Transactions On May 27, 2022, we issued $460.0 million in aggregate principal amount of 3.50% Senior Convertible Notes due 2027 (the "2027 Notes"). The net proceeds from the issuance of the 2027 Notes, after deducting the initial purchasers' transaction fees and offering expenses, were approximately $450.0 million. The 2027 Notes bear interest at a rate of 3.50% per year, payable in cash on June 1 and December 1 of each year, commencing on December 1, 2022, and mature on June 1, 2027, unless earlier redeemed, converted or repurchased. The 2027 Notes will be convertible into cash up to the aggregate principal amount of the notes to be converted and in respect of the remainder, if any, of the Company’s obligation in excess of the aggregate principal amount of the notes being converted, pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination thereof, at the Company’s election, at an initial conversion rate of 12.9041 shares of Common Stock per $1,000 principal amount of Notes (which is equivalent to an initial conversion price of approximately $77.49 per share). From the period January 1, 2024 through December 31, 2024, the holders of the 2027 Notes have the right, but not the obligation, to convert any portion of the principal amount of the 2027 Notes. As such, the 2027 Notes are included in " Current portion of long-term debt " in our condensed consolidated balance sheets as of September 30, 2024 and December 31, 2023. The 2027 Notes are the Company’s senior unsecured obligations and rank equally in right of payment with any of the Company’s current and any future senior unsecured indebtedness. The 2027 Notes are effectively subordinated to all of the Company’s future secured indebtedness, if any, to the extent of the value of the related collateral, and the 2027 Notes are structurally subordinated to indebtedness and other liabilities, including trade payables, of the Company’s subsidiaries. On May 24 and May 25, 2022, in connection with the offering of the 2027 Notes, we entered into convertible note hedge transactions ("2027 Note Hedge Transactions") that cover, subject to customary anti-dilution adjustments, approximately 5.9 million shares of common stock, in the aggregate, at a strike price that initially corresponds to the initial conversion price of the 2027 Notes, subject to adjustment, and are exercisable upon any conversion of the 2027 Notes. Also, on May 24 and May 25, 2022, we entered into privately negotiated warrant transactions ("2027 Warrant Transactions"), whereby we sold warrants to acquire, subject to customary anti-dilution adjustments, approximately 5.9 million shares of common stock. As of September 30, 2024, the warrants under the 2027 Warrant Transactions had a weighted average strike price of $106.31 per share, subject to adjustment, and mature beginning September 2027 through April 2028. 2024 Notes, and Related Note Hedge and Warrant Transactions On June 3, 2019, we issued $400.0 million in aggregate principal amount of Senior Convertible Notes due in 2024 (the "2024 Notes") that bore interest at a rate of 2.00% per year, payable in cash on June 1 and December 1 of each year, commencing on December 1, 2019, and matured on June 1, 2024. During second quarter 2022, we repurchased $273.8 million in aggregate principal amount of the 2024 Notes in privately negotiated transactions concurrently with the offering of the 2027 Notes. We repaid the remaining $126.2 million in aggregate principal at maturity on June 1, 2024. On May 29 and May 31, 2019, in connection with the offering of the 2024 Notes, we entered into convertible note hedge transactions (collectively, the "2024 Note Hedge Transactions") that covered, subject to customary anti-dilution adjustments, approximately 4.9 million shares of common stock, in the aggregate, at a strike price that corresponded to the conversion price of the 2024 Notes, subject to adjustment, and were exercisable upon any conversion of the 2024 Notes. On May 29 and May 31, 2019, we also entered into privately negotiated warrant transactions (collectively, the "2024 Warrant Transactions" and, together with the 2024 Note Hedge Transactions, the "2024 Call Spread Transactions"), whereby we sold warrants to acquire, subject to customary anti-dilution adjustments, approximately 4.9 million shares of common stock at an initial strike price of approximately $109.43 per share, subject to adjustment. At maturity on June 1, 2024, the Company issued 0.3 million shares to settle the 2024 Notes that had been converted by holders. This issuance was effectively offset by our receipt of 0.3 million shares from the settlement of the 2024 Note Hedge Transactions. The 2024 Warrants settle during the period September 3, 2024 through December 17, 2024 on a net-share basis. 0.1 million shares have been issued related to the 2024 Warrant Transactions as of September 30, 2024, and warrants to acquire 1.1 million shares of common stock at an initial strike price of approximately $109.43 per share, subject to adjustment, remain outstanding. The following table reflects the carrying value of our Convertible Notes long-term debt as of September 30, 2024 and December 31, 2023 (in thousands): September 30, 2024 December 31, 2023 3.50% Senior Convertible Notes due 2027 $ 460,000 $ 460,000 2.00% Senior Convertible Notes due 2024 — 126,174 Less: Deferred financing costs (5,750) (7,422) Net carrying amount of the Convertible Notes 454,250 578,752 Less: Current portion of long-term debt (454,250) (578,752) Long-term net carrying amount of the Convertible Notes $ — $ — The following table presents the amount of interest cost recognized, which is included within " Interest expense" in our condensed consolidated statements of income, for the three and nine months ended September 30, 2024 and 2023 relating to the contractual interest coupon and the amortization of deferred financing costs of the Convertible Notes (in thousands): Three months ended September 30, 2024 2023 2027 Notes 2024 Notes Total 2027 Notes 2024 Notes Total Contractual coupon interest $ 4,025 $ — $ 4,025 $ 4,025 $ 631 $ 4,656 Amortization of deferred financing costs 483 — 483 448 147 595 Total $ 4,508 $ — $ 4,508 $ 4,473 $ 778 $ 5,251 Nine months ended September 30, 2024 2023 2027 Notes 2024 Notes Total 2027 Notes 2024 Notes Total Contractual coupon interest $ 12,075 $ 1,059 $ 13,134 $ 12,075 $ 1,893 $ 13,968 Amortization of deferred financing costs 1,419 252 1,671 1,315 433 1,748 Total $ 13,494 $ 1,311 $ 14,805 $ 13,390 $ 2,326 $ 15,716 Technicolor Patent Acquisition Long-Term Debt On July 30, 2018, we completed our acquisition of the patent licensing business of Technicolor SA ("Technicolor"), a worldwide technology leader in the media and entertainment sector (the "Technicolor Patent Acquisition"). In conjunction with the Technicolor Patent Acquisition, we assumed Technicolor’s rights and obligations under a joint licensing program with Sony relating to digital televisions and standalone computer display monitors, which commenced in 2015 (the "Madison Arrangement"). An affiliate of CPPIB Credit Investments Inc. ("CPPIB Credit"), a wholly owned subsidiary of Canada Pension Plan Investment Board, is a third-party investor in the Madison Arrangement. CPPIB Credit made certain payments to Technicolor and Sony and agreed to contribute cash to fund certain capital reserve obligations under the arrangement in exchange for a percentage of future revenues, specifically through September 11, 2030 in regard to the Technicolor patents. Upon our assumption of Technicolor’s rights and obligations under the Madison Arrangement, our relationship with CPPIB Credit meets the criteria in ASC 470-10-25 - Sales of Future Revenues or Various Other Measures of Income ("ASC 470"), which relates to cash received from an investor in exchange for a specified percentage or amount of revenue or other measure of income of a particular product line, business segment, trademark, patent, or contractual right for a defined period. Under this guidance, we recognized the fair value of our contingent obligation to CPPIB Credit, as of the acquisition date, as long-term debt in our condensed consolidated balance sheet. This initial fair value measurement was based on the perspective of a market participant and included significant unobservable inputs which are classified as Level 3 inputs within the fair value hierarchy. The fair value of the long-term debt as of September 30, 2024 and December 31, 2023 is disclosed within Note 3, " Cash, Concentration of Credit Risk and Fair Value of Financial Instruments. " Our repayment obligations are contingent upon future royalty revenues generated from the Madison Arrangement and there are no minimum or maximum payments under the arrangement. Under ASC 470, amounts recorded as debt are amortized under the interest method. At each reporting period, we will review the discounted expected future cash flows over the life of the obligation. The Company made an accounting policy election to utilize the catch-up method when there is a change in the estimated future cash flows, whereby we will adjust the carrying amount of the debt to the present value of the revised estimated future cash flows, discounted at the original effective interest rate, with a corresponding adjustment recognized as interest expense within “ Interest Expense ” in the condensed consolidated statements of income. The effective interest rate as of the acquisition date was approximately 14.5%. This rate represents the discount rate that equates the estimated future cash flows with the fair value of the debt as of the acquisition date and is used to compute the amount of interest to be recognized each period based on the estimated life of the future revenue streams. During the three and nine months ended September 30, 2024, we recognized $0.6 million and $2.2 million, respectively, of interest expense related to this debt, compared to $1.1 million and $2.5 million during the three and nine months ended September 30, 2023, respectively. This was included within “ Interest Expense ” in the condensed consolidated statements of income. Any future payments made to CPPIB Credit, or additional proceeds received from CPPIB Credit, will decrease or increase the long-term debt balance accordingly. We made $12.9 million in payments to CPPIB Credit during the nine months ended September 30, 2024, and no payments were made during the nine months ended September 30, 2023. Technicolor Contingent Consideration As part of the Technicolor Patent Acquisition, we entered into a revenue-sharing arrangement with Technicolor that created a contingent consideration liability. Under the revenue-sharing arrangement, Technicolor receives 42.5% of future cash receipts from new licensing efforts from the Madison Arrangement only, subject to certain conditions and hurdles. As of September 30, 2024, the contingent consideration liability from the revenue-sharing arrangement was deemed not probable and is therefore not reflected within the consolidated financial statements.

Litigation and Legal Proceeding

Litigation and Legal Proceedings	9 Months Ended
	Sep. 30, 2024
Gain (Loss) from Litigation Settlement [Abstract]
LITIGATION AND LEGAL PROCEEDINGS	LITIGATION AND LEGAL PROCEEDINGS ARBITRATIONS AND COURT PROCEEDINGS Lenovo In fourth quarter 2024, the Company reached an agreement with Lenovo Group Limited and certain of its subsidiaries (“Lenovo”) to enter into binding arbitration to determine the final terms of a new patent license agreement, which will be effective from January 1, 2024. As part of the agreement to arbitrate, both parties have agreed to dismiss all pending litigations between them. UK Proceedings In August 2019, the Company and certain of its subsidiaries filed a claim in the UK High Court against Lenovo. The claim, as amended, alleged infringement of five of the Company ’s patents relating to 3G and/or 4G/LTE standards. The Company sought, among other relief, injunctive relief to prevent further infringement of the asserted patents or, in the alternative, a determination of the terms of a FRAND license. Between 2021 and 2023, three of the Company’s European Patents were found by UK courts to be valid, essential and infringed by Lenovo. In March 2023, the UK High Court issued an order staying all deadlines with respect to the fourth and fifth technical trials. On March 16, 2023, the UK High Court issued its order regarding judgment in the trial to determine how much Lenovo must pay for a license to the Company’s portfolio of cellular assets, awarding the Company a lump sum of $138.7 million for such license through December 31, 2023. On June 27, 2023, the court issued an order awarding the Company an additional $46.2 million, thus increasing the total award to $184.9 million, which was paid on July 11, 2023. The court also found that the Company should pay a portion of Lenovo’s costs and granted both parties permission to appeal on certain grounds. Both parties appealed certain aspects of the ruling, and in July 2024, the UK Court of Appeal ruled in favor of InterDigital and awarded the Company an additional amount of $55.2 million to a total of approximately $240.1 million. It rejected Lenovo’s appeal in its entirety and confirmed that Lenovo must pay for all of its past sales starting from 2007 through December 31, 2023. The court also found that Lenovo should pay the Company’s costs for the appeal and reduced the costs that Lenovo was awarded from the initial decision. Lenovo sought permission to appeal, and permission to appeal was refused by the UK Court of Appeals. Lenovo filed an application to the UK Supreme Court requesting permission to appeal on August 9, 2024; Lenovo withdrew its application to appeal in October 2024 following entry into the arbitration agreement described above. On September 24, 2023, Lenovo filed a new claim in the UK High Court, which alleged invalidity of two of the Company’s patents relating to 4G/LTE standards. Lenovo sought, among other relief, a declaration that the patents at issue were invalid, not essential, and not infringed, revocation of the patents at issue, and a declaration that, upon expiration of the current license in 2023, Lenovo is licensed under terms to be determined by the UK High Court through 2028 or, in the alternative, a determination of the terms of a FRAND license. In October 2023, Lenovo filed a request for an order that the Company indicate whether it is prepared to give an unconditional undertaking to enter into a global license on terms set by the UK Court, or failing that, a declaration that the Defendants are unwilling licensors; a hearing was held in December 2023 during which Lenovo agreed to stay its application. The Company filed a jurisdiction challenge in October 2023, and a hearing on such challenge took place in April 2024, following which, the jurisdiction challenge was denied. In November 2023, Lenovo filed an application seeking an expedited FRAND trial and an interim license until a FRAND decision is issued in the UK. A hearing on the interim license was held in February 2024; in March 2024 the UK High Court denied Lenovo’s request for the interim license. A FRAND trial was set for June-July 2025. District of Delaware Patent Proceedings In August 2019, the Company and certain of its subsidiaries filed a complaint in the United States District Court for the District of Delaware (the "Delaware District Court") against Lenovo alleging that Lenovo infringes eight of the Company’s U.S. patents by making, using, offering for sale, and/or selling Lenovo wireless devices with 3G and/or 4G LTE capabilities. As relief, InterDigital sought: (a) a declaration that the Company is not in breach of its relevant FRAND commitments with respect to Lenovo; (b) to the extent Lenovo does not agree to negotiate a worldwide patent license, does not agree to enter into binding international arbitration to set the terms of a FRAND license, and does not agree to be bound by the terms to be set by the UK High Court in the separately filed UK proceedings described above, an injunction prohibiting Lenovo from continued infringement; (c) damages, including enhanced damages for willful infringement and supplemental damages; and (d) attorneys’ fees and costs. In June 2023, the parties requested that the entire case be stayed pending resolution of all appeals in the UK proceedings, and this request was granted. District of Delaware Antitrust Proceedings In April 2020, Lenovo and Motorola Mobility LLC filed a complaint in the Delaware District Court against the Company and certain of its subsidiaries, alleging that the Company defendants violated Sections 1 and 2 of the Sherman Act in connection with, among other things, their licensing of 3G and 4G standards essential patents ("SEPs"). The complaint further alleged that the Company defendants have violated their commitment to the ETSI with respect to the licensing of 3G and 4G SEPs on FRAND terms and conditions. The complaint sought, among other things (i) rulings that the Company defendants have violated Sections 1 and 2 of the Sherman Act and are liable for breach of their ETSI FRAND commitments, (ii) a judgment that the plaintiffs are entitled to a license with respect to the Company’s 3G and 4G SEPs on FRAND terms and conditions, and (iii) injunctions against any demand for allegedly excessive royalties or enforcement of the Company defendants’ 3G and 4G U.S. SEPs against the plaintiffs or their customers via patent infringement proceedings. In June 2020, the Company filed a motion to dismiss Lenovo’s Sherman Act claims with prejudice, and to dismiss Lenovo’s breach of contract claim with leave to re-file as a counterclaim in the Company’s legal proceeding against Lenovo in the Delaware District Court discussed above. In March 2021, the Delaware District Court dismissed the Sherman Act Section 1 claim without prejudice, denied the motion to dismiss the Sherman Act Section 2 claim, and consolidated the Section 2 and breach of contract claims with Company’s Delaware patent proceeding discussed above. International Trade Commission and Companion District Court Proceedings In September 2023, the Company and certain of its subsidiaries filed a complaint in the United States International Trade Commission (the "International Trade Commission") alleging that Lenovo infringes five of the Company’s U.S. patents by making, using, offering for sale, and/or selling certain electronic devices, including smartphones, computers, tablet computers, and components thereof that infringe certain claims of the asserted patents. As relief, the Company sought: (a) a limited exclusion order against Lenovo barring from entry into the United States all of Lenovo’s products that infringe the asserted patents; (b) cease and desist orders prohibiting Lenovo from importing, selling, offering for sale, marketing, advertising, and distributing, infringing products; and (c) a bond during the 60-day Presidential review period. An evidentiary hearing was held in August 2024. Also in September 2023, the Company and certain of its subsidiaries filed a complaint in the United States District Court for the Eastern District of North Carolina (the "North Carolina District Court") alleging that Lenovo infringes those same five of the Company’s U.S. patents. As relief, the Company sought: (a) a finding that Lenovo is liable for infringement of the asserted patents; (b) an injunction against further infringement; (c) damages, including enhanced damages for willful infringement and supplemental damages; and (d) costs. Germany Proceedings In September 2023, the Company filed a complaint with the Munich Regional Court against Lenovo and certain of its affiliates, alleging infringement of a European patent relating to cellular 4G/LTE and/or 5G standards. The Company sought, among other relief, injunctive relief to prevent further infringement of the asserted patents. In May 2024, the Munich Regional Court issued a judgment finding Lenovo infringed the Company’s European patent and that the Company complied with its FRAND obligations while Lenovo did not; the Court ordered Lenovo to cease and desist selling infringing products. The Company served Lenovo with an enforcement note of the judgment in May 2024. Lenovo appealed the judgment and requested a stay of the enforcement of the judgment, and in June 2024, the Munich Regional Court rejected Lenovo’s request. Oppo, OnePlus and realme In fourth quarter 2024, the Company entered into a license agreement with Guangdong Oppo Mobile Telecommunications Corp., Ltd. (“Oppo”) and certain of its subsidiaries and affiliates, (collectively, “Oppo Group”). As part of the license agreement, both parties have agreed to dismiss all pending litigations between them. UK Proceedings In December 2021, the Company filed a patent infringement claim in the UK High Court against Oppo and certain of its affiliates, OnePlus Technology (Shenzhen) Co., Ltd. (“OnePlus”) and certain of its affiliates, and realme Mobile Telecommunications (Shenzhen) Co., Ltd. (“realme”) and certain of its affiliates, collectively, Oppo Group, alleging infringement of the Company’s European patents relating to cellular 3G, 4G/LTE or 5G standards. The Company was seeking, among other relief, injunctive relief to prevent further infringement of the asserted patents. In March 2023, the parties agreed to stay all technical trials. The FRAND trial to determine the royalties to be paid under the license with Oppo was held in March and April 2024; a second hearing was held in September 2024 regarding the parties’ submissions relating to the UK Court of Appeal ’s decision in the Lenovo litigation. India Proceedings In December 2021, the Company and certain of its subsidiaries filed patent infringement claims in the Delhi High Court in New Delhi, India against Oppo and certain of its affiliates, OnePlus and certain of its affiliates, and realme Mobile Telecommunication (India) Private Limited, alleging infringement of certain of the Company’s Indian patents relating to cellular 3G, 4G/LTE, and/or 5G, and HEVC standards. The Company was seeking, among other relief, injunctive relief to prevent further infringement of the asserted patents. In February 2024, the Delhi High Court granted the Company’s application for pro tem security, and Oppo appealed. Evidentiary trial proceedings began in October 2024 and were expected to take place through December 2024. Germany Proceedings In December 2021, a subsidiary of the Company filed three patent infringement claims, two in the Munich Regional Court and one in the Mannheim Regional Court, against Oppo and certain of its affiliates, OnePlus and certain of its affiliates, and realme and certain of its affiliates, alleging infringement of certain of the Company’s European patents relating to cellular 3G, 4G/LTE and/or 5G standards. The Company was seeking, among other relief, injunctive relief to prevent further infringement of the asserted patents. The Munich Regional Court held hearings in March and December 2023, and in December 2023, the Munich Regional Court issued a decision finding infringement and issuing an injunction against Oppo. Oppo appealed this decision. In March and November 2023, the Munich Regional Court entered stays of the proceedings in respect of specific patents. China Proceedings In January 2022, the Company was informed that Oppo had purportedly filed a complaint against the Company in the Guangzhou Intellectual Property Court (the “Guangzhou IP Court”) seeking a determination of a global FRAND royalty rate for the Company’s 3G, 4G, 5G, 802.11 and HEVC SEPs. In May 2022, the Company filed an application challenging, among other things, process of service and the jurisdiction of the Guangzhou IP Court. The Guangzhou IP Court denied the application, and the Company appealed that decision. The Supreme People’s Court denied the appeal, and an initial evidentiary hearing was held in October 2023. Spain Proceedings In March 2022, a subsidiary of the Company filed patent infringement claims in the Barcelona Commercial Courts against Oppo and certain of its affiliates, OnePlus and certain of its affiliates, and realme and certain of its affiliates. The Company filed an amended complaint in April 2022, alleging infringement of certain of its European patents relating to cellular 3G, 4G/LTE and/or 5G standards. The Company was seeking, among other relief, injunctive relief to prevent further infringement of the asserted patents. Evidentiary trial proceedings were scheduled to take place in May 2025. Samsung The Company reached an agreement with Samsung Electronics Co. Ltd. (“Samsung”) to enter into binding arbitration to determine the final terms of a renewed patent license agreement to certain of the Company’s patents, which will be effective from January 1, 2023. The Company and Samsung have also agreed not to initiate certain claims against the other during the arbitration. On March 31, 2023, the Company filed a request for arbitration with the International Chamber of Commerce. On July 21, 2023, the International Chamber of Commerce confirmed the full tribunal for the arbitration. The two-week arbitration hearing was held in July 2024 , and we expect a decision by the end of 2024. Tesla On December 5, 2023, Tesla and certain of its subsidiaries filed a claim in the UK High Court against the Company and Avanci. The claim alleges invalidity of three of the Company’s patents relating to 5G standards: European Patent (UK) Nos. 3,718,369, 3,566,413, and 3,455,985. Tesla sought, among other relief, a declaration that the patents at issue are invalid, not essential, and not infringed, revocation of the patents at issue, a declaration that the terms of the Avanci 5G Connected Vehicle platform license are not FRAND, and a determination of FRAND terms for a license between Tesla and Avanci covering its Avanci’s 5G Connected Vehicle platform. On March 8, 2024, the Company filed a jurisdiction challenge; the jurisdiction challenge was heard on May 24-25 and June 4, 2024, and on July 15, 2024 the UK High Court issued a judgment dismissing Tesla’s FRAND claims against the Company and Avanci, and maintaining Tesla’s patent claims against the Company. The patent claims against the Company were further stayed by the UK High Court, and a hearing on costs and permission to appeal is scheduled for July 30, 2024. On July 16, 2024, Tesla sought permission to appeal the decision; the Company also sought permission to appeal on two limited grounds conditionally, should Tesla’s request for an appeal be granted. The appeal hearing is scheduled to take place on December 2-3, 2024. OTHER We are party to certain other disputes and legal actions in the ordinary course of business, including arbitrations and legal proceedings with licensees regarding the terms of their agreements and the negotiation thereof. We do not currently believe that these matters, even if adversely adjudicated or settled, would have a material adverse effect on our financial condition, results of operations or cash flows. None of the preceding matters have met the requirements for accrual or disclosure of a potential range as of September 30, 2024, except as noted above.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES In the nine months ended September 30, 2024 and 2023, the Company had an estimated effective tax rate of 18.4% and 14.7%, respectively. The change in effective tax rate is due to a decrease in the amount of Foreign Derived Intangible Income deduction benefit available to the Company. In addition, the Company is subject to an increase in the Global Intangible Low-Tax Income inclusion derived from the increase in revenue in certain foreign jurisdictions. The effective tax rate in the nine months ended September 30, 2023 was impacted by losses in certain jurisdictions where the Company recorded a valuation allowance against the related tax benefit. Excluding this valuation allowance, our effective tax rate for the nine months ended September 30, 2023 would have been 13.4%. During both the nine months ended September 30, 2024 and 2023, the Company recorded discrete net benefits of $4.3 million and $2.9 million, respectively, primarily related to share-based compensation. The effective tax rate reported in any given year will continue to be influenced by a variety of factors, including timing differences between the recognition of book and tax revenue, the level of pre-tax income or loss, the foreign vs. domestic classification of the Company’s customers, and any discrete items that may occur. During the nine months ended September 30, 2024 and 2023, the Company paid approximately $14.5 million and $8.4 million, respectively, in foreign source creditable withholding tax.

Net Income Per Share

Net Income Per Share	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
NET INCOME PER SHARE	NET INCOME PER SHARE Basic Earnings Per Share ("EPS") is calculated by dividing net income or loss available to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if options or other securities with features that could result in the issuance of common stock were exercised or converted to common stock or resulting from the unvested outstanding restricted stock units ("RSUs"). The following tables reconcile the numerator and the denominator of the basic and diluted net income per share computation (in thousands, except for per share data): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Net income applicable to InterDigital, Inc. $ 34,190 $ 47,941 $ 225,506 $ 174,983 Weighted-average shares outstanding: Basic 25,149 26,285 25,286 27,259 Dilutive effect of stock options, RSUs, and warrants 2,446 784 1,389 669 Dilutive effect of convertible securities 2,439 743 2,084 333 Diluted 30,034 27,812 28,759 28,261 Earnings per share: Basic $ 1.36 $ 1.82 $ 8.92 $ 6.42 Dilutive effect of stock options, RSUs, and warrants (0.11) (0.05) (0.40) (0.15) Dilutive effect of convertible securities (0.11) (0.05) (0.68) (0.08) Diluted $ 1.14 $ 1.72 $ 7.84 $ 6.19 Shares of common stock issuable upon the exercise or conversion of certain securities have been excluded from our computation of EPS because the strike price or conversion rate, as applicable, of such securities was greater than the average market price of our common stock and, as a result, the effect of such exercise or conversion would have been anti-dilutive. Set forth below are the securities and the weighted average number of shares of common stock underlying such securities that were excluded from our computation of EPS for the periods presented (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Restricted stock units and stock options — 1 1 142 Warrants 6,056 7,488 7,002 7,488 Total 6,056 7,489 7,003 7,630 Convertible Notes and Warrants Refer to Note 5, " Obligations ," for information about the Company's convertible notes and warrants and related conversion and strike prices. During periods in which the average market price of the Company's common stock is above the applicable conversion price of the Company's convertible notes, or above the strike price of the Company's outstanding warrants, the impact of conversion or exercise, as applicable, would be dilutive and such dilutive effect is reflected in diluted EPS. As a result, in periods where the average market price of the Company's common stock is above the conversion price or strike price, as applicable, under the if-converted method, the Company calculates the number of shares issuable under the terms of the convertible notes and the warrants based on the average market price of the stock during the period, and includes that number in the total diluted shares outstanding for the period.

Other Income, Net

Other Income, Net	9 Months Ended
	Sep. 30, 2024
Other Income and Expenses [Abstract]
OTHER INCOME, NET	OTHER INCOME, NET The amounts included in " Other income, net " in the condensed consolidated statements of income for the three and nine months ended September 30, 2024 and 2023 were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Interest and investment income $ 9,175 $ 11,763 $ 31,078 $ 33,697 Other 3,379 2,962 2,405 8,606 Other income, net $ 12,554 $ 14,725 $ 33,483 $ 42,303

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net income attributable to InterDigital, Inc.	$ 34,190	$ 109,664	$ 81,652	$ 47,941	$ 21,783	$ 105,259	$ 225,506	$ 174,983

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Trading Arrangements, by Individual
Material Terms of Trading Arrangement		During the three months ended September 30, 2024, none of the Company’s directors or officers adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement”, as each term is defined in Item 408(a) of Regulation S-K.
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying unaudited, condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, accordingly, do not include all of the detailed schedules, information and notes necessary to state fairly the financial condition, results of operations and cash flows in conformity with United States generally accepted accounting principles (“GAAP”). The year-end condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP for year-end financial statements. Therefore, these financial statements should be read in conjunction with the financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (our “2023 Form 10-K”) as filed with the Securities and Exchange Commission (“SEC”) on February 15, 2024. Definitions of capitalized terms not defined herein appear within our 2023 Form 10-K. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year. We have one reportable segment.
Estimates	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.
Reclassifications	Certain reclassifications have been made to prior year amounts to conform to the current year presentation.
New Accounting Guidance	Accounting Standards Update: Improvements to Reportable Segment Disclosure s In November 2023, the FASB issued ASU No. 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures”. The amendments in the ASU require disclosures to include significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”), a description of other segment items by reportable segment, and any additional measures of a segment's profit or loss used by the CODM when deciding how to allocate resources. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption allowed. We are currently evaluating the impact of adoption on our financial disclosures. Accounting Standards Update: Improvements to Income Tax Disclosures In December 2023, the FASB issued ASU No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures”. The amendments in the ASU enhance income tax disclosures, primarily through standardization, disaggregation of rate reconciliation categories, and income taxes paid by jurisdiction. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, with early adoption allowed. We are currently evaluating the impact of adoption on our financial disclosures.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of supplemental cash flow information	The following table presents additional supplemental cash flow information for the nine months ended September 30, 2024 and 2023 (in thousands): Nine Months Ended September 30, Supplemental cash flow information: 2024 2023 Interest paid $ 9,311 $ 9,312 Income taxes paid, including foreign withholding taxes 37,269 30,117 Non-cash investing and financing activities: Settlement of the 2024 Hedge Transactions 37,120 — Dividend payable 11,366 10,348 Right-of-use assets obtained in exchange of operating lease liabilities 2,023 93 Accrued capitalized patent costs and property and equipment purchases (2,261) 334 Unsettled repurchase of common stock — 1,853

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Schedule of disaggregation of revenue	The following table presents the disaggregation of our revenue for the three and nine months ended September 30, 2024 and 2023 (in thousands): Three Months Ended September 30, 2024 2023 Increase/(Decrease) Recurring revenues: Smartphone $ 74,184 $ 88,376 $ (14,192) (16) % CE, IoT/Auto 23,830 15,659 8,171 52 % Other 620 441 179 41 % Total recurring revenues 98,634 104,476 (5,842) (6) % Catch-up revenues a 30,045 35,630 (5,585) (16) % Total revenues $ 128,679 $ 140,106 $ (11,427) (8) % Nine Months Ended September 30, 2024 2023 Increase/(Decrease) Recurring revenues: Smartphone $ 221,738 $ 260,882 $ (39,144) (15) % CE, IoT/Auto 67,824 43,177 24,647 57 % Other 1,878 1,063 815 77 % Total recurring revenues 291,440 305,122 (13,682) (4) % Catch-up revenues a 324,274 138,948 185,326 133 % Total revenues $ 615,714 $ 444,070 $ 171,644 39 % (a) Catch-up revenues are comprised of past patent royalties and revenues from static fixed-fee agreements.
Schedule of contracted revenue	Based on contracts signed and committed as of September 30, 2024, we expect to recognize the following revenue from dynamic fixed-fee royalty payments over the term of such contracts (in thousands): Revenue (a) Remainder of 2024 $ 84,979 2025 330,439 2026 237,275 2027 227,858 2028 215,821 Thereafter 265,882 Total Revenue $ 1,362,254 (a) This table includes estimated revenue related to our Samsung arbitration. In accordance with ASC 606, these estimates are limited to the amount of revenue we expect to recognize only to the extent it is probable that a subsequent change in the estimate would not result in a significant revenue reversal.

Cash, Concentration of Credit_2

Cash, Concentration of Credit Risk and Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of cash and cash equivalents	The following table provides a reconciliation of total cash, cash equivalents and restricted cash as of September 30, 2024, December 31, 2023 and September 30, 2023 to the captions within the condensed consolidated balance sheets and condensed consolidated statements of cash flows (in thousands): September 30, December 31, September 30, 2024 2023 2023 Cash and cash equivalents $ 401,090 $ 437,076 $ 518,483 Restricted cash included within prepaid and other current assets 9,690 5,885 7,229 Total cash, cash equivalents, and restricted cash $ 410,780 $ 442,961 $ 525,712
Schedule of restricted cash and cash equivalents	The following table provides a reconciliation of total cash, cash equivalents and restricted cash as of September 30, 2024, December 31, 2023 and September 30, 2023 to the captions within the condensed consolidated balance sheets and condensed consolidated statements of cash flows (in thousands): September 30, December 31, September 30, 2024 2023 2023 Cash and cash equivalents $ 401,090 $ 437,076 $ 518,483 Restricted cash included within prepaid and other current assets 9,690 5,885 7,229 Total cash, cash equivalents, and restricted cash $ 410,780 $ 442,961 $ 525,712
Schedule of fair value on a recurring basis	Our financial assets and liabilities that are accounted for at fair value on a recurring basis are presented in the tables below as of September 30, 2024 and December 31, 2023 (in thousands): Fair Value as of September 30, 2024 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 400,422 $ — $ — $ 400,422 Commercial paper — 95,932 — 95,932 U.S. government securities — 192,507 — 192,507 Corporate bonds, asset backed and other securities (c) — 134,039 — 134,039 Total $ 400,422 $ 422,478 $ — $ 822,900 Fair Value as of December 31, 2023 Level 1 Level 2 Level 3 Total Assets: Money market and demand accounts (a) $ 430,707 $ — $ — $ 430,707 Commercial paper (b) — 174,991 — 174,991 U.S. government securities — 256,850 — 256,850 Corporate bonds, asset backed and other securities (c) — 149,693 — 149,693 Total $ 430,707 $ 581,534 $ — $ 1,012,241 ______________________________ (a) Primarily included within cash and cash equivalents. (b) As of December 31, 2023, $5.7 million of commercial paper was included within cash and cash equivalents. (c) As of September 30, 2024 and December 31, 2023, $10.4 million and $6.5 million of corporate bonds, asset backed and other securities was included within cash and cash equivalents, respectively.
Schedule of aggregate fair value	The aggregate fair value of the principal amount of the Convertible Notes is a Level 2 fair value measurement. September 30, 2024 December 31, 2023 Principal Carrying Fair Principal Carrying Fair 2027 Senior Convertible Long-Term Debt $ 460,000 $ 454,250 $ 855,554 $ 460,000 $ 452,830 $ 677,230 2024 Senior Convertible Long-Term Debt $ — $ — $ — $ 126,174 $ 125,922 $ 171,130 September 30, 2024 December 31, 2023 Carrying Fair Carrying Fair Technicolor Patent Acquisition Long-Term Debt $ 18,302 $ 16,584 $ 29,019 $ 28,859

Other Assets and Liabilities (T

Other Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of prepaid and other current assets	The amounts included in " Prepaid and other current assets " in the condensed consolidated balance sheet as of September 30, 2024 and December 31, 2023 were as follows (in thousands): September 30, 2024 December 31, 2023 Deposits $ 40,643 $ — Prepaid assets 35,019 9,353 Tax receivables 25,257 19,835 Restricted cash 9,690 5,885 Other current assets 17,497 8,903 Total Prepaid and other current assets $ 128,106 $ 43,976
Schedule of other non-current assets	The amounts included in " Other non-current assets, net " in the condensed consolidated balance sheet as of September 30, 2024 and December 31, 2023 were as follows (in thousands): September 30, 2024 December 31, 2023 Tax receivables $ 87,331 $ 76,740 Goodwill 22,421 22,421 Long-term investments 20,667 31,895 Right-of-use assets 15,840 15,746 Other non-current assets 4,177 2,854 Total Other non-current assets, net $ 150,436 $ 149,656
Schedule of other accrued expenses	The amounts included in " Other accrued expenses " in the condensed consolidated balance sheet as of September 30, 2024 and December 31, 2023 were as follows (in thousands): September 30, 2024 December 31, 2023 Accrued legal fees $ 20,616 $ 10,338 Customer deposit — 76,100 Other accrued expenses 21,673 11,604 Total Other accrued expenses $ 42,289 $ 98,042
Schedule of other long-term liabilities	The amounts included in " Other long-term liabilities " in the condensed consolidated balance sheet as of September 30, 2024 and December 31, 2023 were as follows (in thousands): September 30, 2024 December 31, 2023 Deferred compensation liabilities $ 19,560 $ 18,413 Operating lease liabilities 16,819 17,385 Other long-term liabilities 19,696 19,454 Total Other long-term liabilities $ 56,075 $ 55,252

Obligations (Tables)

Obligations (Tables)	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Schedule of carrying value of the 2024 Notes and 2020 Notes	The following table reflects the carrying value of our Convertible Notes long-term debt as of September 30, 2024 and December 31, 2023 (in thousands): September 30, 2024 December 31, 2023 3.50% Senior Convertible Notes due 2027 $ 460,000 $ 460,000 2.00% Senior Convertible Notes due 2024 — 126,174 Less: Deferred financing costs (5,750) (7,422) Net carrying amount of the Convertible Notes 454,250 578,752 Less: Current portion of long-term debt (454,250) (578,752) Long-term net carrying amount of the Convertible Notes $ — $ —
Schedule of accretion of the debt discount, and the amortization of financing costs	The following table presents the amount of interest cost recognized, which is included within " Interest expense" in our condensed consolidated statements of income, for the three and nine months ended September 30, 2024 and 2023 relating to the contractual interest coupon and the amortization of deferred financing costs of the Convertible Notes (in thousands): Three months ended September 30, 2024 2023 2027 Notes 2024 Notes Total 2027 Notes 2024 Notes Total Contractual coupon interest $ 4,025 $ — $ 4,025 $ 4,025 $ 631 $ 4,656 Amortization of deferred financing costs 483 — 483 448 147 595 Total $ 4,508 $ — $ 4,508 $ 4,473 $ 778 $ 5,251 Nine months ended September 30, 2024 2023 2027 Notes 2024 Notes Total 2027 Notes 2024 Notes Total Contractual coupon interest $ 12,075 $ 1,059 $ 13,134 $ 12,075 $ 1,893 $ 13,968 Amortization of deferred financing costs 1,419 252 1,671 1,315 433 1,748 Total $ 13,494 $ 1,311 $ 14,805 $ 13,390 $ 2,326 $ 15,716

Net Income Per Share (Tables)

Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Schedule of numerator and the denominator of the basic and diluted	The following tables reconcile the numerator and the denominator of the basic and diluted net income per share computation (in thousands, except for per share data): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Net income applicable to InterDigital, Inc. $ 34,190 $ 47,941 $ 225,506 $ 174,983 Weighted-average shares outstanding: Basic 25,149 26,285 25,286 27,259 Dilutive effect of stock options, RSUs, and warrants 2,446 784 1,389 669 Dilutive effect of convertible securities 2,439 743 2,084 333 Diluted 30,034 27,812 28,759 28,261 Earnings per share: Basic $ 1.36 $ 1.82 $ 8.92 $ 6.42 Dilutive effect of stock options, RSUs, and warrants (0.11) (0.05) (0.40) (0.15) Dilutive effect of convertible securities (0.11) (0.05) (0.68) (0.08) Diluted $ 1.14 $ 1.72 $ 7.84 $ 6.19
Schedule of excluded from our computation of EPS	Set forth below are the securities and the weighted average number of shares of common stock underlying such securities that were excluded from our computation of EPS for the periods presented (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Restricted stock units and stock options — 1 1 142 Warrants 6,056 7,488 7,002 7,488 Total 6,056 7,489 7,003 7,630

Other Income, Net (Tables)

Other Income, Net (Tables)	9 Months Ended
	Sep. 30, 2024
Other Income and Expenses [Abstract]
Schedule of other income (expense), net	The amounts included in " Other income, net " in the condensed consolidated statements of income for the three and nine months ended September 30, 2024 and 2023 were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Interest and investment income $ 9,175 $ 11,763 $ 31,078 $ 33,697 Other 3,379 2,962 2,405 8,606 Other income, net $ 12,554 $ 14,725 $ 33,483 $ 42,303

Basis of Presentation - Narrati

Basis of Presentation - Narrative (Details)	9 Months Ended
	Sep. 30, 2024 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	1

Basis of Presentation - Schedul

Basis of Presentation - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Supplemental cash flow information:
Interest paid	$ 9,311	$ 9,312
Income taxes paid, including foreign withholding taxes	37,269	30,117
Non-cash investing and financing activities:
Settlement of the 2024 Hedge Transactions	37,120	0
Dividend payable	11,366	10,348	$ 10,226
Right-of-use assets obtained in exchange of operating lease liabilities	2,023	93
Accrued capitalized patent costs and property and equipment purchases	(2,261)	334
Unsettled repurchase of common stock	$ 0	$ 1,853

Revenue - Disaggregated Revenue

Revenue - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 128,679	$ 140,106	$ 615,714	$ 444,070
Increase/(decrease) in disaggregated revenue	$ (11,427)		$ 171,644
Percentage increase/(decrease) in disaggregated revenue	(8.00%)		39%
Total recurring revenues
Disaggregation of Revenue [Line Items]
Revenue	$ 98,634	104,476	$ 291,440	305,122
Increase/(decrease) in disaggregated revenue	$ (5,842)		$ (13,682)
Percentage increase/(decrease) in disaggregated revenue	(6.00%)		(4.00%)
Smartphone
Disaggregation of Revenue [Line Items]
Revenue	$ 74,184	88,376	$ 221,738	260,882
Increase/(decrease) in disaggregated revenue	$ (14,192)		$ (39,144)
Percentage increase/(decrease) in disaggregated revenue	(16.00%)		(15.00%)
CE, IoT/Auto
Disaggregation of Revenue [Line Items]
Revenue	$ 23,830	15,659	$ 67,824	43,177
Increase/(decrease) in disaggregated revenue	$ 8,171		$ 24,647
Percentage increase/(decrease) in disaggregated revenue	52%		57%
Other
Disaggregation of Revenue [Line Items]
Revenue	$ 620	441	$ 1,878	1,063
Increase/(decrease) in disaggregated revenue	$ 179		$ 815
Percentage increase/(decrease) in disaggregated revenue	41%		77%
Catch-up revenues
Disaggregation of Revenue [Line Items]
Revenue	$ 30,045	$ 35,630	$ 324,274	$ 138,948
Increase/(decrease) in disaggregated revenue	$ (5,585)		$ 185,326
Percentage increase/(decrease) in disaggregated revenue	(16.00%)		133%

Revenue - Narrative (Details)

Revenue - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Revenue recognized that had been included in deferred revenue as of the beginning of the period	$ 119.8
Contract assets, current	$ 161.1	$ 94.6

Revenue - Remaining Performance

Revenue - Remaining Performance Obligation (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 1,362,254
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 84,979
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 330,439
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 237,275
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 227,858
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 215,821
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 265,882
Revenue, remaining performance obligation, expected timing of satisfaction, period

Cash, Concentration of Credit_3

Cash, Concentration of Credit Risk and Fair Value of Financial Instruments - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Cash and cash equivalents	$ 401,090	$ 437,076	$ 518,483
Restricted cash included within prepaid and other current assets	9,690	5,885	7,229
Total cash, cash equivalents, and restricted cash	$ 410,780	$ 442,961	$ 525,712	$ 703,161

Cash, Concentration of Credit_4

Cash, Concentration of Credit Risk and Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Investment in Other Entities
Concentration Risk [Line Items]
Gain (loss) on investments	$ 0.3	$ 6.1	$ 1.8	$ 9.4
Patents
Concentration Risk [Line Items]
Patent impairment charges				$ 2.5
Accounts Receivable | Licensee Concentration Risk | Four Largest Licensees
Concentration Risk [Line Items]
Accounts receivable percentage			85%		84%

Cash, Concentration of Credit_5

Cash, Concentration of Credit Risk and Fair Value of Financial Instruments - Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Assets:
Total	$ 822,900	$ 1,012,241
Amount of commercial paper included in cash and cash equivalents	401,090	437,076	$ 518,483
U.S. government securities
Assets:
Securities	192,507	256,850
Corporate bonds, asset backed and other securities
Assets:
Securities	134,039	149,693
Money market and demand accounts
Assets:
Cash and cash equivalents	400,422	430,707
Commercial Paper
Assets:
Cash and cash equivalents	95,932	174,991
Amount of commercial paper included in cash and cash equivalents		5,700
Corporate bonds, asset backed and other securities
Assets:
Amount of commercial paper included in cash and cash equivalents	10,400	6,500
Level 1
Assets:
Total	400,422	430,707
Level 1 | U.S. government securities
Assets:
Securities	0	0
Level 1 | Corporate bonds, asset backed and other securities
Assets:
Securities	0	0
Level 1 | Money market and demand accounts
Assets:
Cash and cash equivalents	400,422	430,707
Level 1 | Commercial Paper
Assets:
Cash and cash equivalents	0	0
Level 2
Assets:
Total	422,478	581,534
Level 2 | U.S. government securities
Assets:
Securities	192,507	256,850
Level 2 | Corporate bonds, asset backed and other securities
Assets:
Securities	134,039	149,693
Level 2 | Money market and demand accounts
Assets:
Cash and cash equivalents	0	0
Level 2 | Commercial Paper
Assets:
Cash and cash equivalents	95,932	174,991
Level 3
Assets:
Total	0	0
Level 3 | U.S. government securities
Assets:
Securities	0	0
Level 3 | Corporate bonds, asset backed and other securities
Assets:
Securities	0	0
Level 3 | Money market and demand accounts
Assets:
Cash and cash equivalents	0	0
Level 3 | Commercial Paper
Assets:
Cash and cash equivalents	$ 0	$ 0

Cash, Concentration of Credit_6

Cash, Concentration of Credit Risk and Fair Value of Financial Instruments - Fair Value of Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Technicolor Patent Acquisition Long-Term Debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Carrying Value	$ 18,302	$ 29,019
Fair Value	16,584	28,859
Convertible Debt | 3.50% Senior Convertible Notes due 2027
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Principal Amount	460,000	460,000
Carrying Value	454,250	452,830
Fair Value	855,554	677,230
Convertible Debt | 2.00% Senior Convertible Notes due 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Principal Amount	0	126,174
Carrying Value	0	125,922
Fair Value	$ 0	$ 171,130

Other Assets and Liabilities -

Other Assets and Liabilities - Prepaid and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deposits	$ 40,643	$ 0
Prepaid assets	35,019	9,353
Tax receivables	25,257	19,835
Restricted cash	9,690	5,885	$ 7,229
Other current assets	17,497	8,903
Total Prepaid and other current assets	$ 128,106	$ 43,976

Other Assets and Liabilities _2

Other Assets and Liabilities - Other Non-Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Tax receivables	$ 87,331	$ 76,740
Goodwill	22,421	22,421
Long-term investments	20,667	31,895
Right-of-use assets	15,840	15,746
Other non-current assets	4,177	2,854
Total Other non-current assets, net	$ 150,436	$ 149,656

Other Assets and Liabilities _3

Other Assets and Liabilities - Schedule of Other Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Accrued legal fees	$ 20,616	$ 10,338
Customer deposit	0	76,100
Other accrued expenses	21,673	11,604
Total Other accrued expenses	$ 42,289	$ 98,042

Other Assets and Liabilities _4

Other Assets and Liabilities - Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred compensation liabilities	$ 19,560	$ 18,413
Operating lease liabilities	16,819	17,385
Other long-term liabilities	19,696	19,454
Total Other long-term liabilities	$ 56,075	$ 55,252

Obligations - 2027 and 2024 Sen

Obligations - 2027 and 2024 Senior Convertible Notes, and Related Note Hedge and Warrant Transactions (Details) $ / shares in Units, shares in Millions, $ in Millions			9 Months Ended
	Jun. 01, 2024 USD ($) shares	May 27, 2022 USD ($) $ / shares	Sep. 30, 2024 $ / shares shares	Jun. 30, 2022 USD ($)	May 25, 2022 shares	Jun. 03, 2019 USD ($)	May 31, 2019 $ / shares shares
Debt Instrument [Line Items]
Number of securities (in shares)					5.9
Stock Issued, settlement of convertible debt (in shares)	0.3
3.50% Senior Convertible Notes due 2027 | 2024 Senior Convertible Long-Term Debt
Debt Instrument [Line Items]
Principal amount | $		$ 460
Interest rate (as a percent)		3.50%	3.50%
Proceeds from debt | $		$ 450
Debt instrument convertible ratio		0.0129041
Conversion price (in USD per share) | $ / shares		$ 77.49
Anti-dilution adjustments (in shares)					5.9
Exercise price (in USD per share) | $ / shares			$ 106.31
2.00% Senior Convertible Notes due 2024 | 2024 Senior Convertible Long-Term Debt
Debt Instrument [Line Items]
Principal amount | $						$ 400
Interest rate (as a percent)			2%			2%
Repurchase amount | $				$ 273.8
Repayments of debt | $	$ 126.2
2024 Note Hedge Transaction | 2024 Senior Convertible Long-Term Debt
Debt Instrument [Line Items]
Anti-dilution adjustments (in shares)							4.9
Stock received, settlement of underlying derivative (in shares)	0.3
2024 Warrant Transactions
Debt Instrument [Line Items]
Number of securities (in shares)			1.1				4.9
Exercise price (in USD per share) | $ / shares			$ 109.43				$ 109.43
Stock issued related to warrants (in shares)			0.1

Obligations - Carrying Value of

Obligations - Carrying Value of 2027 Notes and 2024 Notes (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	May 27, 2022	Jun. 03, 2019
Debt Instrument [Line Items]
Less: Current portion of long-term debt	$ (454,250)	$ (578,752)
Long-term net carrying amount of the Convertible Notes	18,302	29,019
Convertible Debt
Debt Instrument [Line Items]
Less: Deferred financing costs	(5,750)	(7,422)
Net carrying amount of the Convertible Notes	454,250	578,752
Less: Current portion of long-term debt	(454,250)	(578,752)
Long-term net carrying amount of the Convertible Notes	0	0
Convertible Debt | 3.50% Senior Convertible Notes due 2027
Debt Instrument [Line Items]
Long-term debt, gross	$ 460,000	460,000
Interest rate (as a percent)	3.50%		3.50%
Convertible Debt | 2.00% Senior Convertible Notes due 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	$ 126,174
Interest rate (as a percent)	2%			2%

Obligations - Accretion of Debt

Obligations - Accretion of Debt Discount and Amortization of Financing Costs (Details) - Convertible Debt - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Contractual coupon interest	$ 4,025	$ 4,656	$ 13,134	$ 13,968
Amortization of deferred financing costs	483	595	1,671	1,748
Total	4,508	5,251	14,805	15,716
3.50% Senior Convertible Notes due 2027
Debt Instrument [Line Items]
Contractual coupon interest	4,025	4,025	12,075	12,075
Amortization of deferred financing costs	483	448	1,419	1,315
Total	4,508	4,473	13,494	13,390
2.00% Senior Convertible Notes due 2024
Debt Instrument [Line Items]
Contractual coupon interest	0	631	1,059	1,893
Amortization of deferred financing costs	0	147	252	433
Total	$ 0	$ 778	$ 1,311	$ 2,326

Obligations - Technicolor Paten

Obligations - Technicolor Patent Acquisition Long-Term Debt (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Business Acquisition [Line Items]
Payment to CPPIB			$ 12.9	$ 0
Technicolor
Business Acquisition [Line Items]
Effective interest rate percentage	14.50%		14.50%
Interest debt expense	$ 0.6	$ 1.1	$ 2.2	$ 2.5
Receive future cash receipts percentage	42.50%		42.50%

Litigation and Legal Proceedi_2

Litigation and Legal Proceedings (Details) $ in Millions			1 Months Ended
	Jun. 27, 2023 USD ($)	Mar. 16, 2023 USD ($)	Jul. 31, 2024 USD ($)	Dec. 31, 2023 claim	Dec. 05, 2023 patent	Sep. 30, 2023 patent	Sep. 24, 2023 patent	Dec. 31, 2021 patent	Aug. 31, 2019 patent	Aug. 27, 2019 patent
U.K. Proceedings
Loss Contingencies [Line Items]
Number of patents alleged infringement							2			5
Amount awarded | $	$ 184.9	$ 138.7	$ 240.1
Additional amount awarded | $	$ 46.2		$ 55.2
Number claims filed by counterparty | claim				3
District of Delaware Proceedings
Loss Contingencies [Line Items]
Number of patents alleged infringement									8
International Trade Commission Proceedings
Loss Contingencies [Line Items]
Number of patents alleged infringement						5
North Carolina District Court
Loss Contingencies [Line Items]
Number of patents alleged infringement						5
German Proceedings
Loss Contingencies [Line Items]
Number of patents alleged infringement								3
German Proceedings, Munich
Loss Contingencies [Line Items]
Number of patents alleged infringement								2
German Proceedings, Mannheim
Loss Contingencies [Line Items]
Number of patents alleged infringement								1
Tesla Proceedings
Loss Contingencies [Line Items]
Number of patents alleged infringement					3

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Income Tax Contingency [Line Items]
Effective tax rate	18.40%	14.70%
Effective tax rate before valuation allowance is included (as percent)		13.40%
Discrete tax benefit	$ 4,300	$ 2,900
Income taxes paid, including foreign withholding taxes	37,269	30,117
Foreign Country
Income Tax Contingency [Line Items]
Income taxes paid, including foreign withholding taxes	$ 14,500	$ 8,400

Net Income Per Share - Numerato

Net Income Per Share - Numerator and Denominator of Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income applicable to InterDigital, Inc.	$ 34,190	$ 109,664	$ 81,652	$ 47,941	$ 21,783	$ 105,259	$ 225,506	$ 174,983
Weighted-average shares outstanding:
Basic (in shares)	25,149			26,285			25,286	27,259
Dilutive effect of stock options, RSUs, and warrants (in shares)	2,446			784			1,389	669
Dilutive effect of convertible securities (in shares)	2,439			743			2,084	333
Diluted (in shares)	30,034			27,812			28,759	28,261
Earnings per share:
Basic (in USD per share)	$ 1.36			$ 1.82			$ 8.92	$ 6.42
Dilutive effect of stock options, RSUs, and warrants (in USD per share)	(0.11)			(0.05)			(0.40)	(0.15)
Dilutive effect of convertible securities (in USD per share)	(0.11)			(0.05)			(0.68)	(0.08)
Diluted (in USD per share)	$ 1.14			$ 1.72			$ 7.84	$ 6.19

Net Income Per Share - Antidilu

Net Income Per Share - Antidilutive Securities Excluded from Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	6,056	7,489	7,003	7,630
Restricted stock units and stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	0	1	1	142
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	6,056	7,488	7,002	7,488

Other Income, Net - Other Incom

Other Income, Net - Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Other Income and Expenses [Abstract]
Interest and investment income	$ 9,175	$ 11,763	$ 31,078	$ 33,697
Other	3,379	2,962	2,405	8,606
Other income, net	$ 12,554	$ 14,725	$ 33,483	$ 42,303