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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Cash flows from operating activities |  |  |  |
Net income (loss) | $ (10,099) | $ (41,109) | $ (585,165) | $ (101,975)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |  |  |
Depreciation and amortization | 3,770 | 3,321 | 7,513 | 6,659
Non-cash operating lease cost | 1,335 | 3,415 | 2,588 | 6,684
Amortization of premium (accretion of discount) on marketable securities, net | (11,362) | (6,150) | (19,491) | (11,282)
Stock-based compensation expense | 64,266 | 10,103 | 641,774 | 22,583
Other adjustments | 141 | 150 | 626 | 166
Changes in operating assets and liabilities: |  |  |  |
Accounts receivable | (24,793) | (8,833) | 5,194 | 24,913
Prepaid expenses and other assets | (6,270) | 1,840 | (20,182) | 828
Operating lease right-of-use assets and liabilities | (780) | (2,211) | (1,310) | (3,082)
Accounts payable | 18,220 | (6,323) | 16,042 | 383
Accrued expenses and other liabilities | (6,043) | (8,256) | 12,860 | 4,145
Net cash provided by (used in) operating activities | 28,385 | (54,053) | 60,449 | (49,978)
Cash flows from investing activities |  |  |  |
Purchases of property and equipment | (1,202) | (830) | (4,053) | (1,186)
Purchases of marketable securities | (861,827) | (351,366) | (997,512) | (614,212)
Maturities of marketable securities | 343,404 | 319,512 | 596,059 | 634,877
Proceeds from sale of marketable securities | 0 | 749 | 0 | 37,538
Other investing activities | (12) | 42 | (27) | 112
Net cash provided by (used in) investing activities | (519,637) | (31,893) | (405,533) | 57,129
Cash flows from financing activities |  |  |  |
Proceeds from issuance of Class A common stock in initial public offering, net of underwriting discounts and commissions | 0 | 0 | 600,022 | 0
Proceeds from exercise of employee stock options | 1,843 | 830 | 24,932 | 1,791
Taxes paid related to net share settlement of restricted stock units | (7,569) | 0 | (202,306) | (4,229)
Payments of initial public offering costs | (3,585) | (496) | (6,338) | (858)
Other financing activities | 0 | 0 | (4,450) | 0
Net cash provided by (used in) financing activities | (9,311) | 334 | 411,860 | (3,296)
Net increase (decrease) in cash, cash equivalents, and restricted cash | (500,563) | (85,612) | 66,776 | 3,855
Cash, cash equivalents, and restricted cash at the beginning of the period | 968,565 | 525,327 | 401,226 | 435,860
Cash, cash equivalents, and restricted cash at the end of the period | 468,002 | 439,715 | 468,002 | 439,715
Cash and cash equivalents | 467,952 | 439,665 | 467,952 | 439,665
Restricted cash | 50 | 50 | 50 | 50
Total cash, cash equivalents, and restricted cash | 468,002 | 439,715 | 468,002 | 439,715
Supplemental disclosures of cash flow information |  |  |  |
Cash paid for income taxes | 2,561 | 565 | 2,725 | 852
Supplemental disclosure of noncash financing and investing activities |  |  |  |
Conversion of convertible preferred stock to common stock upon initial public offering | 0 | 0 | 1,853,492 | 0
Reclassification of deferred offering costs to additional paid-in capital upon initial public offering | 0 | 0 | 23,754 | 0
Operating lease right-of-use assets recognized in exchange for lease liabilities | $ 3,687 | $ 0 | $ 3,687 | $ 12,014

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