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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net income (loss) | $ (159,948) | $ 344,165 | $ 434,100
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |
Depreciation and amortization | 625,085 | 397,344 | 382,314
Asset impairment charges | 194,030 | 0 | 12,097
Amortization of debt discount and debt issuance costs | 6,069 | 10,560 | 1,079
Stock-based compensation | 31,594 | 31,198 | 32,456
(Gain) loss on investment securities | 22,377 | (13,953) | (11,299)
Gain on reimbursement of drilling equipment | (33,398) | (33,309) | (48,173)
Other loss on sale of assets | 1,541 | 5,139 | 8,016
Deferred income tax benefit | (78,661) | (23,191) | (20,400)
Other | 14,039 | 5,132 | 8,979
Change in assets and liabilities: |  |  |
Accounts receivable | (48,598) | (10,744) | 56,281
Inventories of materials and supplies | (26,851) | (20,764) | (7,826)
Prepaid expenses and other | 41,522 | 3,370 | (1,803)
Other noncurrent assets | (11,459) | (20,740) | (11,135)
Accounts payable | (21,346) | (2,291) | 4,237
Accrued liabilities | (74,607) | 16,798 | (10,139)
Other noncurrent liabilities | 61,561 | (4,051) | 4,898
Net cash provided by operating activities | 542,950 | 684,663 | 833,682
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Capital expenditures | (426,373) | (495,072) | (395,460)
Purchase of short-term investments | (117,057) | (200,653) | (180,993)
Purchase of long-term investments | (3,296) | (9,120) | (20,748)
Payment for acquisition of business, net of cash acquired | (1,836,072) | 0 | 0
Proceeds from sale of short-term investments | 378,353 | 204,152 | 195,311
Proceeds from sale of long-term investments | 31,990 | 0 | 0
Insurance proceeds from involuntary conversion | 2,366 | 5,533 | 9,221
Proceeds from asset sales | 45,776 | 46,412 | 70,085
Other | (1,029) | (10,000) | 0
Net cash used in investing activities | (1,925,342) | (458,748) | (322,584)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Dividends paid | (100,735) | (168,459) | (201,456)
Distributions to non-controlling interests | (15,380) | 0 | 0
Proceeds from debt issuance | 400,000 | 1,247,629 | 0
Debt issuance costs | (2,629) | (22,934) | 0
Payments for employee taxes on net settlement of equity awards | (10,836) | (12,177) | (14,410)
Payment of contingent consideration from acquisition of business | 0 | (6,250) | (250)
Payments on unsecured long-term debt | (200,000) | 0 | 0
Share repurchases | 0 | (51,302) | (247,213)
Other | (3,759) | 0 | (540)
Net cash provided by (used in) financing activities | 66,661 | 986,507 | (463,869)
Effect of exchange rate changes on cash, cash equivalents and restricted cash | 12,971 | 0 | 0
Net increase (decrease) in cash and cash equivalents and restricted cash | (1,302,760) | 1,212,422 | 47,229
Cash and cash equivalents and restricted cash, beginning of period | 1,528,660 | 316,238 | 269,009
Cash and cash equivalents and restricted cash, end of period | 225,900 | 1,528,660 | 316,238
Cash paid (received) during the period: |  |  |
Interest paid | 82,295 | 15,947 | 17,099
Income tax paid | 205,618 | 181,349 | 199,139
Income tax received | (201) | (1,224) | (26,809)
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Payments for operating leases | 56,590 | 13,260 | 12,441
Non-cash operating and investing activities: |  |  |
Changes in accounts payable and accrued liabilities related to purchases of property, plant and equipment | $ 11,780 | $ (20,454) | $ (2,554)

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