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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Cash flows from operating activities: |  |  |  |  |  |
Net income |  | $ 230,455 | $ 179,821 |  | $ 333,904 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Stock-based compensation |  | 54,267 | 44,880 |  | 45,011 |
Depreciation |  | 35,111 | 30,980 |  | 33,687 |
Amortization of intangible assets |  | 6,878 | 11,710 |  | 14,741 |
Loss on fair value adjustment of derivatives, net |  | 0 | 0 |  | 240 |
Deferred income taxes |  | 29,590 | (9,875) |  | (145,350) |
Gain on divestiture |  | 0 | 0 |  | (90,784) |
Gain on sale of non-marketable equity security |  | 0 | 0 |  | (23,924) |
Impairment of assets |  | 0 | 1,071 |  | 10,045 |
Change in fair value of earn-out liability |  | 0 | (5,044) |  | 9,234 |
Other |  | 73 | 15 |  | 648 |
Change in operating assets and liabilities, net of effects of disposition: |  |  |  |  |  |
Accounts receivable |  | (14,653) | (39,835) |  | (28,931) |
Unbilled receivables |  | 666 | 26,191 |  | 93,796 |
Prepaid expenses and other assets |  | (3,992) | (5,500) |  | 2,763 |
Inventories |  | 536 | (8,480) |  | (15,254) |
Income taxes receivable | [1] | (12,280) | (21,179) |  | (87,704) |
Accounts payable |  | 11,397 | 580 |  | (5,768) |
Accrued salaries and benefits and other liabilities |  | 6,548 | 571 |  | 41 |
Income taxes payable | [1] | 11,233 | 26,275 |  | 59,643 |
Deferred revenue |  | 9,743 | 3,774 |  | (5,048) |
Operating lease liabilities |  | (5,553) | (5,356) |  | (5,204) |
Net cash provided by operating activities |  | 360,019 | 230,599 |  | 195,786 |
Cash flows from investing activities: |  |  |  |  |  |
Purchases of property and equipment |  | (26,842) | (30,697) |  | (23,240) |
Purchases of marketable securities |  | (666,294) | (415,374) |  | (434,155) |
Maturities of marketable securities |  | 470,026 | 280,829 |  | 175,854 |
Proceeds from sale of marketable securities |  | 0 | 85,722 |  | 117,798 |
Proceeds from sale of non-marketable equity security |  | 0 | 22,796 |  | 0 |
Proceeds from divestiture |  | 0 | 0 |  | 106,347 |
Net cash used in investing activities |  | (223,110) | (56,724) |  | (57,396) |
Cash flows from financing activities: |  |  |  |  |  |
Proceeds received from issuance of common stock under employee stock plans |  | 6,859 | 5,465 |  | 8,950 |
Payments of taxes related to net share settlement of equity awards |  | (41,870) | (41,340) |  | (38,328) |
Payments under installment payment arrangements |  | (12,289) | (16,350) |  | (16,192) |
Payments for settlement and repurchase of convertible senior notes |  | 0 | 0 |  | (10,381) |
Payments for settlement of warrants |  | 0 | 0 |  | (10,697) |
Payment of deferred purchase consideration from acquisition |  | 0 | (2,450) |  | (2,450) |
Repurchase and retirement of common stock, including prepayment under accelerated share repurchase program in 2024 and 2023 |  | (7,114) | (113,312) |  | (100,525) |
Net cash used in financing activities |  | (54,414) | (167,987) |  | (169,623) |
Effect of exchange rate changes on cash and cash equivalents |  | 556 | (880) |  | 306 |
Net increase (decrease) in cash and cash equivalents |  | 83,051 | 5,008 |  | (30,927) |
Cash, cash equivalents and restricted cash at beginning of year | [2] | 99,775 | 94,767 |  | 125,694 |
Cash, cash equivalents and restricted cash at end of year |  | 182,826 | 99,775 | [2] | 94,767 | [2]
Cash paid during the period for: |  |  |  |  |  |
Interest |  | 0 | 0 |  | 73 |
Income taxes, net of refunds |  | 24,992 | 27,132 |  | 25,932 |
Non-cash investing and financing activities: |  |  |  |  |  |
Property and equipment received and accrued in accounts payable and other liabilities |  | 15,345 | 3,935 |  | 21,768 |
Issuance of common stock in connection with the payments of earn-out related to the PLDA Group acquisition |  | 0 | 7,456 |  | 16,556 |
Operating lease right-of-use assets obtained in exchange for operating lease obligations |  | $ 0 | $ 4,799 |  | $ 1,690 |
[1] | (1) Excludes non-cash write-down of income taxes receivable and release of income taxes payable of $118.9 million, including interest, related to South Korea withholding taxes in 2025. Refer to Note 18, “Income Taxes.”
[2] | (2) Includes a restricted cash balance of approximately $0.4 million as of December 31, 2022.

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