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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Cash flows from operating activities: |  |
Net income (loss) | $ 43.4 | $ (76.6)
Adjustments to reconcile net income (loss) to net cash from operating activities: |  |
Stock-based compensation expense | 44.5 | 39.9
Charges associated with convertible senior notes | 88.7 | 0.0
Depreciation | 5.3 | 4.1
Accretion of discount on investments, net | (7.1) | (2.1)
Amortization of intangible assets | 0.9 | 0.9
Changes in fair value of equity investments | (1.6) | (2.2)
Deferred income taxes | (15.6) | (31.6)
Other | 3.4 | (0.1)
Change in operating assets and liabilities: |  |
Accounts receivable | (11.3) | (41.7)
Inventory | 1.1 | 1.8
Accounts payable and accrued liabilities | (18.6) | 6.7
Other assets and liabilities, net | (2.8) | (24.3)
Cash flows from operating activities | 130.3 | (125.2)
Cash flows from investing activities: |  |
Purchases of debt securities available-for-sale | (320.1) | (206.2)
Sales and maturities of debt securities available-for-sale | 276.3 | 203.9
Purchases of equity investments | 0.0 | (31.3)
Capital expenditures | (11.2) | (8.5)
Cash flows from investing activities | (55.0) | (42.1)
Cash flows from financing activities: |  |
Issuances of common stock under benefit plans | 69.9 | 8.2
Cash flows from financing activities | 69.9 | 8.2
Change in cash, cash equivalents and restricted cash | 145.2 | (159.1)
Cash, cash equivalents and restricted cash at beginning of period | 259.1 | 270.7
Cash, cash equivalents and restricted cash at end of period | 404.3 | 111.6
Supplemental disclosures: |  |
Non-cash capital expenditures | 1.1 | 0.6
Cash paid for income taxes | $ 0.2 | $ 0.2

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