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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income | $ 27,289 | $ 86,455
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 24,077 | 25,335
Accretion of discounts on marketable securities | (21,297) | (26,695)
Amortization of issuance costs | 3,510 | 1,760
Amortization of deferred contract costs | 30,830 | 24,294
Stock-based compensation, net of amounts capitalized | 344,727 | 269,685
Non-cash lease expense | 17,390 | 13,591
Allowance for credit losses on accounts receivable | 8,415 | 6,574
Loss on disposal of property and equipment | 832 | 343
Changes in operating assets and liabilities: |  |
Accounts receivable, net | (11,672) | (30,586)
Deferred contract costs | (45,820) | (32,170)
Prepaid expenses and other current assets | 1,080 | (8,443)
Other assets | (3,038) | 2,171
Accounts payable | 85,640 | 31,570
Accrued expenses and other liabilities | 2,398 | (15,856)
Deferred revenue | 7,235 | 28,666
Net cash provided by operating activities | 471,596 | 376,694
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Purchases of marketable securities | (1,721,779) | (1,240,301)
Maturities of marketable securities | 1,253,110 | 965,985
Proceeds from sale of marketable securities | 13,136 | 8
Purchases of property and equipment | (23,900) | (18,573)
Capitalized software development costs | (37,952) | (27,594)
Cash paid for acquisition of businesses; net of cash acquired | (117,090) | (444)
Net cash used in investing activities | (634,475) | (320,919)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from exercise of stock options | 3,358 | 3,944
Proceeds from issuance of common stock under the employee stock purchase plan | 28,578 | 22,507
Proceeds from issuance of 2029 Convertible Senior Notes, net of issuance costs | (190) | 0
Repayments of 2025 Convertible Senior Notes | (635,547) | (25)
Net cash (used in) provided by financing activities | (603,801) | 26,426
Effect of exchange rate changes on cash and cash equivalents | 8,727 | (1,577)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS | (757,953) | 80,624
CASH AND CASH EQUIVALENTS—Beginning of period | 1,246,983 | 330,339
CASH AND CASH EQUIVALENTS—End of period | 489,030 | 410,963
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: |  |
Cash paid for income taxes | 11,306 | 14,822
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES: |  |
Accrued property and equipment purchases | 8,160 | 3,840
Stock-based compensation included in capitalized software development costs | 11,619 | 6,906
Issuance of restricted shares of common stock for the acquisition of businesses | 53,038 | 0
Acquisition holdback | $ 16,072 | $ 0

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