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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Operating activities |  |
Net loss | $ (2,454) | $ (1,301)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock-based compensation | 213 | 149
Depreciation and amortization | 77 | 170
Amortization/accretion of investments | (55) | (29)
Loss (gain) on equity investments, net | 35 | (17)
Deferred income taxes | 0 | (530)
Other non-cash items | 7 | (12)
Changes in assets and liabilities, net of acquisition of business: |  |
Accounts receivable, net | 729 | 1,153
Prepaid expenses and other assets | 3 | (142)
Inventory | (197) | 234
Right-of-use assets, operating leases | (62) | (9)
Accounts payable | (199) | (187)
Accrued liabilities | (464) | (633)
Deferred revenue | 146 | (979)
Income taxes payable | (56) | (1)
Operating lease liabilities | 25 | 12
Other liabilities | (11) | (18)
Net cash used in operating activities | (2,263) | (2,140)
Investing activities |  |
Purchases of marketable securities | (3,390) | (1,281)
Proceeds from maturities of marketable securities | 3,536 | 3,264
Proceeds from sales of marketable securities | 1,999 | 2,427
Purchases of property, plant and equipment | (378) | (347)
Acquisition of business, net of cash acquired | 0 | (85)
Investment in convertible notes and equity securities | 0 | (23)
Net cash provided by investing activities | 1,767 | 3,955
Financing activities |  |
Proceeds from issuance of common stock through equity plans | 47 | 25
Repurchase of common stock, including excise tax | 0 | (1,154)
Changes in financing lease liabilities | 1 | (81)
Net cash provided by (used in) financing activities | 48 | (1,210)
Net (decrease) increase in cash, cash equivalents and restricted cash | (448) | 605
Cash, cash equivalents and restricted cash, beginning of year | 2,928 | 3,217
Cash, cash equivalents and restricted cash, end of period | 2,480 | 3,822
Non-cash investing and financing activities |  |
Purchases of property and equipment included in accounts payable and accrued liabilities | 86 | 105
Right-of-use assets obtained through finance lease modifications and reassessments | $ 0 | $ 50

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