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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Cash flows from operating activities: |  |  |
Net income |  | $ 166,615 | $ 117,619
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Stock-based compensation |  | 39,822 | 33,145
Depreciation |  | 25,654 | 23,000
Amortization of intangible assets |  | 5,158 | 9,380
Deferred income taxes |  | 22,888 | (2,217)
Impairment of assets |  | 0 | 1,071
Change in fair value of earn-out liability |  | 0 | (5,044)
Other |  | 1 | 19
Change in operating assets and liabilities: |  |  |
Accounts receivable |  | 17,466 | (4,279)
Unbilled receivables |  | 66 | 20,938
Prepaids and other current assets |  | (3,595) | (1,694)
Inventories |  | 28 | (12,751)
Income taxes receivable | [1] | (11,944) | (15,502)
Accounts payable |  | (5,153) | 2,295
Accrued salaries and benefits and other liabilities |  | (6,502) | (9,666)
Income taxes payable | [1] | 10,213 | 17,890
Deferred revenue |  | 3,583 | 1,259
Operating lease liabilities |  | (4,098) | (3,848)
Net cash provided by operating activities |  | 260,202 | 171,615
Cash flows from investing activities: |  |  |
Purchases of property and equipment |  | (20,325) | (24,208)
Purchases of marketable securities |  | (498,171) | (278,158)
Maturities of marketable securities |  | 287,055 | 206,861
Proceeds from sales of marketable securities |  | 0 | 85,722
Proceeds from sale of non-marketable equity security |  | 0 | 22,796
Net cash provided by (used in) investing activities |  | (231,441) | 13,013
Cash flows from financing activities: |  |  |
Proceeds from issuance of common stock under employee stock plans |  | 3,743 | 3,447
Payments of taxes on restricted stock units |  | (37,640) | (40,312)
Payments under installment payment arrangements |  | (10,163) | (12,699)
Payment of deferred purchase consideration from acquisition |  | 0 | (2,450)
Repurchase and retirement of common stock |  | (5,810) | (113,312)
Net cash used in financing activities |  | (49,870) | (165,326)
Effect of exchange rate changes on cash and cash equivalents |  | 534 | (89)
Net increase (decrease) in cash and cash equivalents |  | (20,575) | 19,213
Cash and cash equivalents at beginning of period |  | 99,775 | 94,767
Cash and cash equivalents at end of period |  | 79,200 | 113,980
Non-cash investing and financing activities: |  |  |
Property and equipment received and accrued in accounts payable and other liabilities |  | 713 | 1,510
Operating lease right-of-use assets obtained in exchange for operating lease obligations |  | $ 0 | $ 3,331
[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. Refer to Note 13, “Income Taxes.”

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