| ☒ | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 | ||||
| ☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 | ||||

| Delaware | 46-2058888 | ||||
| (State or other jurisdiction of | (I.R.S. Employer | ||||
| incorporation or organization) | Identification No.) | ||||
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered | ||||||||||||
| Common Stock | TWST | The Nasdaq Global Select Market | ||||||||||||
| Large accelerated filer | ☒ | Accelerated filer | ☐ | ||||||||
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ | ||||||||
| Emerging growth company | ☐ | ||||||||||
Financial Statements (unaudited) | ||||||||
| (In thousands, except per share data) | March 31, 2026 | September 30, 2025 | ||||||||||||
| Assets | ||||||||||||||
| Current assets: | ||||||||||||||
| Cash and cash equivalents | $ | 122,670 | $ | 183,049 | ||||||||||
| Short-term investments | 49,001 | 49,385 | ||||||||||||
Accounts receivable, net[1] | 64,153 | 57,019 | ||||||||||||
| Inventories | 33,515 | 28,309 | ||||||||||||
Prepaid expenses and other current assets[1] | 54,100 | 15,204 | ||||||||||||
| Total current assets | $ | 323,439 | $ | 332,966 | ||||||||||
| Property and equipment, net | 111,226 | 102,283 | ||||||||||||
| Operating lease right-of-use assets | 70,655 | 49,377 | ||||||||||||
Investment in equity securities[1] | 68,087 | 54,337 | ||||||||||||
| Goodwill | 82,195 | 82,195 | ||||||||||||
| Intangible assets, net | 12,996 | 13,425 | ||||||||||||
| Restricted cash, non-current | 2,182 | 2,376 | ||||||||||||
Other non-current assets[1] | 5,434 | 4,902 | ||||||||||||
| Total assets | $ | 676,214 | $ | 641,861 | ||||||||||
| Liabilities and stockholders’ equity | ||||||||||||||
| Current liabilities: | ||||||||||||||
| Accounts payable | $ | 14,682 | $ | 11,094 | ||||||||||
| Accrued compensation | 27,003 | 31,288 | ||||||||||||
| Current portion of operating lease liability | 10,443 | 13,822 | ||||||||||||
| Accrued expenses and other current liabilities | 67,848 | 35,202 | ||||||||||||
| Total current liabilities | $ | 119,976 | $ | 91,406 | ||||||||||
| Operating lease liability, net of current portion | 85,398 | 61,750 | ||||||||||||
| Liability related to the sale of future revenue | 15,000 | 15,000 | ||||||||||||
Other non-current liabilities[1] | 746 | 747 | ||||||||||||
| Total liabilities | $ | 221,120 | $ | 168,903 | ||||||||||
| Commitments and contingencies (Note 11) | ||||||||||||||
| Stockholders’ equity | ||||||||||||||
Common stock, $0.00001 par value —200,000 and 200,000 shares authorized at March 31, 2026 and September 30, 2025, respectively; 62,154 and 60,632 shares issued and outstanding at March 31, 2026 and September 30, 2025, respectively | $ | 1 | $ | — | ||||||||||
| Additional paid-in capital | 1,849,838 | 1,793,163 | ||||||||||||
| Accumulated other comprehensive loss | (639) | (627) | ||||||||||||
| Accumulated deficit | (1,394,106) | (1,319,578) | ||||||||||||
| Total stockholders’ equity | $ | 455,094 | $ | 472,958 | ||||||||||
| Total liabilities and stockholders’ equity | $ | 676,214 | $ | 641,861 | ||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (In thousands, except per share data) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
Revenues[1] | $ | 110,715 | $ | 92,793 | $ | 214,413 | $ | 181,506 | ||||||||||||||||||
| Costs and expenses: | ||||||||||||||||||||||||||
| Cost of revenues | $ | 53,593 | $ | 46,765 | $ | 103,319 | $ | 92,638 | ||||||||||||||||||
| Research and development expenses | 19,695 | 23,917 | 36,825 | 45,224 | ||||||||||||||||||||||
Selling, general and administrative expenses[1] | 76,085 | 63,671 | 145,827 | 119,849 | ||||||||||||||||||||||
| Litigation settlement costs, net of recoveries | 7,205 | — | 7,205 | — | ||||||||||||||||||||||
| Total costs and expenses | $ | 156,578 | $ | 134,353 | $ | 293,176 | $ | 257,711 | ||||||||||||||||||
| Loss from operations | $ | (45,863) | $ | (41,560) | $ | (78,763) | $ | (76,205) | ||||||||||||||||||
| Interest income | 1,710 | 2,801 | 3,885 | 6,041 | ||||||||||||||||||||||
Other income (expense), net[1] | 175 | (394) | 646 | (487) | ||||||||||||||||||||||
| Loss before income taxes | $ | (43,978) | $ | (39,153) | $ | (74,232) | $ | (70,651) | ||||||||||||||||||
| Income tax expense | (43) | (175) | (296) | (271) | ||||||||||||||||||||||
| Net loss | $ | (44,021) | $ | (39,328) | $ | (74,528) | $ | (70,922) | ||||||||||||||||||
| Other comprehensive loss: | ||||||||||||||||||||||||||
| Change in unrealized gain (loss) on investments | $ | (85) | $ | 30 | $ | (67) | $ | 97 | ||||||||||||||||||
| Foreign currency translation adjustment | 17 | (25) | 55 | 43 | ||||||||||||||||||||||
| Comprehensive loss | $ | (44,089) | $ | (39,323) | $ | (74,540) | $ | (70,782) | ||||||||||||||||||
| Net loss per share — basic and diluted | $ | (0.71) | $ | (0.66) | $ | (1.21) | $ | (1.19) | ||||||||||||||||||
| Weighted average shares used in computing net loss per share — basic and diluted | 61,702 | 59,649 | 61,387 | 59,403 | ||||||||||||||||||||||
| Three Months Ended March 31, 2026 | ||||||||||||||||||||||||||||||||||||||
| Common stock | Additional paid-in capital | Accumulated Other comprehensive loss | Accumulated deficit | Total stockholders' equity | ||||||||||||||||||||||||||||||||||
| (In thousands) | Shares | Amount | ||||||||||||||||||||||||||||||||||||
| Balances as of December 31, 2025 | 61,274 | $ | — | $ | 1,806,751 | $ | (571) | $ | (1,350,085) | $ | 456,095 | |||||||||||||||||||||||||||
| Issuance of common stock for investment in equity securities | 201 | $ | — | $ | 10,000 | $ | — | $ | — | $ | 10,000 | |||||||||||||||||||||||||||
| Issuance of common stock in connection with asset acquisition | 201 | — | 10,000 | — | — | 10,000 | ||||||||||||||||||||||||||||||||
| Vesting of restricted stock units | 296 | — | — | — | — | — | ||||||||||||||||||||||||||||||||
| Exercise of stock options | 78 | — | 1,789 | — | — | 1,789 | ||||||||||||||||||||||||||||||||
| Issuance of shares under the employee stock purchase plan | 104 | 1 | 2,357 | — | — | 2,358 | ||||||||||||||||||||||||||||||||
| Repurchases of common stock for income tax withholding | — | — | (7) | — | — | (7) | ||||||||||||||||||||||||||||||||
| Stock-based compensation | — | — | 18,948 | — | — | 18,948 | ||||||||||||||||||||||||||||||||
| Other comprehensive loss | — | — | — | (68) | — | (68) | ||||||||||||||||||||||||||||||||
| Net loss | — | — | — | — | (44,021) | (44,021) | ||||||||||||||||||||||||||||||||
| Balances as of March 31, 2026 | 62,154 | $ | 1 | $ | 1,849,838 | $ | (639) | $ | (1,394,106) | $ | 455,094 | |||||||||||||||||||||||||||
| Three Months Ended March 31, 2025 | ||||||||||||||||||||||||||||||||||||||
| Common stock | Additional paid-in capital | Accumulated Other comprehensive loss | Accumulated deficit | Total stockholders' equity | ||||||||||||||||||||||||||||||||||
| (In thousands) | Shares | Amount | ||||||||||||||||||||||||||||||||||||
| Balances as of December 31, 2024 | 59,582 | $ | — | $ | 1,730,092 | $ | (649) | $ | (1,273,502) | $ | 455,941 | |||||||||||||||||||||||||||
| Restricted common stock canceled | (137) | $ | — | $ | — | $ | — | $ | — | $ | — | |||||||||||||||||||||||||||
| Vesting of restricted stock units | 275 | — | — | — | — | — | ||||||||||||||||||||||||||||||||
| Exercise of stock options | 72 | — | 771 | — | — | 771 | ||||||||||||||||||||||||||||||||
| Issuance of shares under the employee stock purchase plan | 65 | — | 2,429 | — | — | 2,429 | ||||||||||||||||||||||||||||||||
| Repurchases of common stock for income tax withholding | — | — | (4) | — | — | (4) | ||||||||||||||||||||||||||||||||
| Stock-based compensation | — | — | 20,312 | — | — | 20,312 | ||||||||||||||||||||||||||||||||
| Other comprehensive loss | — | — | — | (13) | — | (13) | ||||||||||||||||||||||||||||||||
| Net loss | — | — | — | — | (39,328) | (39,328) | ||||||||||||||||||||||||||||||||
| Balances as of March 31, 2025 | 59,857 | $ | — | $ | 1,753,600 | $ | (662) | $ | (1,312,830) | $ | 440,108 | |||||||||||||||||||||||||||
| Six Months Ended March 31, 2026 | ||||||||||||||||||||||||||||||||||||||
| Common stock | Additional paid-in capital | Accumulated Other comprehensive loss | Accumulated deficit | Total stockholders' equity | ||||||||||||||||||||||||||||||||||
| (In thousands) | Shares | Amount | ||||||||||||||||||||||||||||||||||||
| Balances as of September 30, 2025 | 60,632 | $ | — | $ | 1,793,163 | $ | (627) | $ | (1,319,578) | $ | 472,958 | |||||||||||||||||||||||||||
| Issuance of common stock for investment in equity securities | 201 | $ | — | $ | 10,000 | $ | — | $ | — | $ | 10,000 | |||||||||||||||||||||||||||
| Issuance of common stock in connection with asset acquisition | 201 | — | 10,000 | — | — | 10,000 | ||||||||||||||||||||||||||||||||
| Vesting of restricted stock units | 923 | — | — | — | — | — | ||||||||||||||||||||||||||||||||
| Exercise of stock options | 93 | — | 2,089 | — | — | 2,089 | ||||||||||||||||||||||||||||||||
| Issuance of shares under the employee stock purchase plan | 104 | 1 | 2,357 | — | — | 2,358 | ||||||||||||||||||||||||||||||||
| Repurchases of common stock for income tax withholding | — | — | (9) | — | — | (9) | ||||||||||||||||||||||||||||||||
| Stock-based compensation | — | — | 32,238 | — | — | 32,238 | ||||||||||||||||||||||||||||||||
| Other comprehensive loss | — | — | — | (12) | — | (12) | ||||||||||||||||||||||||||||||||
| Net loss | — | — | — | — | (74,528) | (74,528) | ||||||||||||||||||||||||||||||||
| Balances as of March 31, 2026 | 62,154 | $ | 1 | $ | 1,849,838 | $ | (639) | $ | (1,394,106) | $ | 455,094 | |||||||||||||||||||||||||||
| Six Months Ended March 31, 2025 | ||||||||||||||||||||||||||||||||||||||
| Common stock | Additional paid-in capital | Accumulated Other comprehensive loss | Accumulated deficit | Total stockholders' equity | ||||||||||||||||||||||||||||||||||
| (In thousands) | Shares | Amount | ||||||||||||||||||||||||||||||||||||
| Balances as of September 30, 2024 | 58,877 | $ | — | $ | 1,715,119 | $ | (522) | $ | (1,241,908) | $ | 472,689 | |||||||||||||||||||||||||||
| Restricted common stock canceled | (137) | $ | — | $ | — | $ | — | $ | — | $ | — | |||||||||||||||||||||||||||
| Vesting of restricted stock units | 811 | — | — | — | — | — | ||||||||||||||||||||||||||||||||
| Exercise of stock options | 241 | — | 3,722 | — | — | 3,722 | ||||||||||||||||||||||||||||||||
| Issuance of shares under the employee stock purchase plan | 65 | — | 2,429 | — | — | 2,429 | ||||||||||||||||||||||||||||||||
| Repurchases of common stock for income tax withholding | — | — | (11) | — | — | (11) | ||||||||||||||||||||||||||||||||
| Stock-based compensation | — | — | 32,341 | — | — | 32,341 | ||||||||||||||||||||||||||||||||
| Other comprehensive loss | — | — | — | (140) | — | (140) | ||||||||||||||||||||||||||||||||
| Net loss | — | — | — | — | (70,922) | (70,922) | ||||||||||||||||||||||||||||||||
| Balances as of March 31, 2025 | 59,857 | $ | — | $ | 1,753,600 | $ | (662) | $ | (1,312,830) | $ | 440,108 | |||||||||||||||||||||||||||
| Six months ended March 31, | ||||||||||||||
| (in thousands) | 2026 | 2025 | ||||||||||||
| Operating activities | ||||||||||||||
| Net loss | $ | (74,528) | $ | (70,922) | ||||||||||
| Adjustments to reconcile net loss to net cash used in operating activities | ||||||||||||||
| Depreciation and amortization | 12,608 | 12,784 | ||||||||||||
| Stock-based compensation expense | 32,209 | 32,319 | ||||||||||||
Other non-cash adjustments[1] | (834) | 811 | ||||||||||||
| Changes in assets and liabilities: | ||||||||||||||
Accounts receivable, net[1] | (7,412) | (15,259) | ||||||||||||
| Inventories | (5,205) | 3,217 | ||||||||||||
Prepaid expenses and other current assets[1] | (18,861) | 884 | ||||||||||||
| Other non-current assets | (416) | (622) | ||||||||||||
Accounts payable | 1,541 | 6,422 | ||||||||||||
| Accrued compensation | (4,268) | (8,658) | ||||||||||||
| Accrued and other liabilities | 22,793 | 4,610 | ||||||||||||
| Net cash used in operating activities | $ | (42,373) | $ | (34,414) | ||||||||||
| Investing activities | ||||||||||||||
| Purchases of property and equipment | $ | (17,861) | $ | (6,412) | ||||||||||
| Purchase of intangible asset | (100) | — | ||||||||||||
| Purchases of investments | (25,227) | (25,525) | ||||||||||||
| Proceeds from maturity of investments | 25,550 | 28,975 | ||||||||||||
| Cash paid for asset acquisition | (5,000) | — | ||||||||||||
| Cash paid for investment in equity securities | (1) | — | ||||||||||||
| Net cash used in investing activities | $ | (22,639) | $ | (2,962) | ||||||||||
| Financing activities | ||||||||||||||
| Proceeds from exercise of stock options | $ | 2,089 | $ | 3,722 | ||||||||||
| Proceeds from the issuance of liability related to sale of future revenue | — | 15,000 | ||||||||||||
| Proceeds from issuance under employee stock purchase plan | 2,357 | 2,429 | ||||||||||||
| Repurchases of common stock for income tax withholding | (10) | (11) | ||||||||||||
| Net cash provided by financing activities | $ | 4,436 | $ | 21,140 | ||||||||||
| Effect of exchange rates on cash, cash equivalents and restricted cash | $ | 3 | $ | 51 | ||||||||||
| Net decrease in cash, cash equivalents, and restricted cash | (60,573) | (16,185) | ||||||||||||
| Cash, cash equivalents, and restricted cash at beginning of period | 185,425 | 229,132 | ||||||||||||
| Cash, cash equivalents, and restricted cash at end of period | $ | 124,852 | $ | 212,947 | ||||||||||
| Supplemental disclosure of cash flow information | ||||||||||||||
| Income taxes paid, net of refunds | $ | 658 | $ | 16 | ||||||||||
| Non-cash investing and financing activities | ||||||||||||||
| Property and equipment additions included in accounts payable and accrued expenses | $ | 5,540 | $ | 1,329 | ||||||||||
| Operating lease right-of-use assets obtained in exchange for operating lease liabilities | 24,773 | — | ||||||||||||
| Issuance of common stock for investment in equity securities | 10,000 | — | ||||||||||||
| Liability for issuance of common stock for investment in equity securities | 3,750 | — | ||||||||||||
| Issuance of common stock in connection with asset acquisition | 10,000 | — | ||||||||||||
| Liability for issuance of common stock in connection with asset acquisition | 5,000 | — | ||||||||||||
| (in thousands) | March 31, 2026 | September 30, 2025 | ||||||||||||
| Cash and cash equivalents | $ | 122,670 | $ | 183,049 | ||||||||||
| Restricted cash, non-current | 2,182 | 2,376 | ||||||||||||
| Total cash, cash equivalents and restricted cash | $ | 124,852 | $ | 185,425 | ||||||||||
| (in thousands) | March 31, 2026 | September 30, 2025 | ||||||||||||
Contract assets(1) | $ | 8,394 | $ | 3,857 | ||||||||||
Contract liabilities(2) | 7,095 | 6,884 | ||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| Americas | $ | 64,307 | $ | 55,189 | $ | 122,688 | $ | 108,899 | ||||||||||||||||||
| EMEA | 37,347 | 30,642 | 75,712 | 58,945 | ||||||||||||||||||||||
| APAC | 9,061 | 6,962 | 16,013 | 13,662 | ||||||||||||||||||||||
| Total | $ | 110,715 | $ | 92,793 | $ | 214,413 | $ | 181,506 | ||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| DNA synthesis and protein solutions | $ | 53,274 | 41,647 | $ | 104,334 | 81,718 | ||||||||||||||||||||
| NGS applications | 57,441 | 51,146 | 110,079 | 99,788 | ||||||||||||||||||||||
| Total | $ | 110,715 | $ | 92,793 | $ | 214,413 | $ | 181,506 | ||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| Therapeutics | $ | 40,766 | $ | 26,250 | $ | 77,991 | $ | 53,022 | ||||||||||||||||||
| Diagnostics | 39,960 | 35,030 | 75,275 | 70,513 | ||||||||||||||||||||||
| Industry and applied | 5,797 | 7,043 | 11,918 | 12,570 | ||||||||||||||||||||||
| Academic research and government | 12,816 | 12,469 | 25,033 | 24,865 | ||||||||||||||||||||||
| Global supply partners | 11,376 | 12,001 | 24,196 | 20,536 | ||||||||||||||||||||||
| Total | $ | 110,715 | $ | 92,793 | $ | 214,413 | $ | 181,506 | ||||||||||||||||||
| (in thousands) | Amortized cost | Gross unrealized gains | Gross unrealized losses | Fair value | ||||||||||||||||||||||
| Cash | $ | 33,483 | $ | — | $ | — | $ | 33,483 | ||||||||||||||||||
| Cash equivalents - money market funds | 89,187 | — | — | 89,187 | ||||||||||||||||||||||
| Total cash and cash equivalents | $ | 122,670 | $ | — | $ | — | $ | 122,670 | ||||||||||||||||||
| Short-term investments: | ||||||||||||||||||||||||||
| U.S. government treasury bills | $ | 48,999 | $ | 22 | $ | (20) | $ | 49,001 | ||||||||||||||||||
| Total short-term investments | $ | 48,999 | $ | 22 | $ | (20) | $ | 49,001 | ||||||||||||||||||
| Total cash, cash equivalents and short-term investments | $ | 171,669 | $ | 22 | $ | (20) | $ | 171,671 | ||||||||||||||||||
| (in thousands) | Amortized cost | Gross unrealized gains | Gross unrealized losses | Fair value | ||||||||||||||||||||||
| Cash | $ | 32,677 | $ | — | $ | — | $ | 32,677 | ||||||||||||||||||
| Cash equivalents - money market funds | 150,372 | — | — | 150,372 | ||||||||||||||||||||||
| Total cash and cash equivalents | $ | 183,049 | $ | — | $ | — | $ | 183,049 | ||||||||||||||||||
| Short-term investments: | ||||||||||||||||||||||||||
| U.S. government treasury bills | $ | 49,316 | $ | 69 | $ | — | $ | 49,385 | ||||||||||||||||||
| Total short-term investments | $ | 49,316 | $ | 69 | $ | — | $ | 49,385 | ||||||||||||||||||
| Total cash, cash equivalents and short-term investments | $ | 232,365 | $ | 69 | $ | — | $ | 232,434 | ||||||||||||||||||
| (in thousands) | Level 1 | Level 2 | Level 3 | Fair value | ||||||||||||||||||||||
| Assets | ||||||||||||||||||||||||||
| Money market funds | $ | 89,187 | $ | — | $ | — | $ | 89,187 | ||||||||||||||||||
| U.S. government treasury bills | 49,001 | — | — | 49,001 | ||||||||||||||||||||||
| Total financial assets | $ | 138,188 | $ | — | $ | — | $ | 138,188 | ||||||||||||||||||
| Liabilities | ||||||||||||||||||||||||||
| Liability for issuance of shares of common stock | — | — | 5,000 | 5,000 | ||||||||||||||||||||||
| Total financial liabilities | $ | — | $ | — | $ | 5,000 | $ | 5,000 | ||||||||||||||||||
| (in thousands) | Level 1 | Level 2 | Level 3 | Fair value | ||||||||||||||||||||||
| Assets | ||||||||||||||||||||||||||
| Money market funds | $ | 150,372 | $ | — | $ | — | $ | 150,372 | ||||||||||||||||||
| U.S. government treasury bills | 49,385 | — | — | 49,385 | ||||||||||||||||||||||
| Total financial assets | $ | 199,757 | $ | — | $ | — | $ | 199,757 | ||||||||||||||||||
| (in thousands) | Financial statements line item | March 31, 2026 | September 30, 2025 | |||||||||||||||||
| Assets | ||||||||||||||||||||
Other receivables[1] | Prepaid and other current assets | $ | 112 | $ | 290 | |||||||||||||||
| Asset acquisition purchase consideration | Prepaid and other current assets | 20,000 | — | |||||||||||||||||
Investments[2] | Investment in equity securities | 68,087 | 54,337 | |||||||||||||||||
Promissory note receivable[1] | Other non-current assets | 1,894 | 1,783 | |||||||||||||||||
| Total assets | $ | 90,093 | $ | 56,410 | ||||||||||||||||
| Liabilities | ||||||||||||||||||||
| Liability for issuance of shares of common stock | Accrued expenses and other current liabilities | $ | 5,000 | $ | — | |||||||||||||||
Sublease security deposit[1] | Other non-current liabilities | 170 | 170 | |||||||||||||||||
| Total liabilities | $ | 5,170 | $ | 170 | ||||||||||||||||
| Maximum exposures to VIEs | $ | 90,093 | $ | 56,410 | ||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| Sublease income | $ | 681 | $ | — | $ | 1,419 | $ | — | ||||||||||||||||||
| Interest income | 56 | — | 111 | — | ||||||||||||||||||||||
| (in thousands) | March 31, 2026 | September 30, 2025 | ||||||||||||
| Prepaid expenses | $ | 9,337 | $ | 9,626 | ||||||||||
| Contract assets | 8,394 | 3,857 | ||||||||||||
| Asset acquisition purchase consideration | 20,000 | — | ||||||||||||
| Insurance receivable for litigation settlement costs | 14,901 | — | ||||||||||||
| Other current assets | 1,468 | 1,721 | ||||||||||||
| $ | 54,100 | $ | 15,204 | |||||||||||
| (in thousands) | March 31, 2026 | September 30, 2025 | ||||||||||||
| Raw materials | $ | 25,549 | $ | 20,191 | ||||||||||
| Work-in-process | 2,943 | 2,265 | ||||||||||||
| Finished goods | 5,023 | 5,853 | ||||||||||||
| $ | 33,515 | $ | 28,309 | |||||||||||
| (in thousands) | March 31, 2026 | September 30, 2025 | ||||||||||||
| Laboratory equipment | $ | 108,766 | $ | 101,583 | ||||||||||
| Furniture, fixtures and other equipment | 2,908 | 2,905 | ||||||||||||
| Vehicles | 211 | 211 | ||||||||||||
| Computer equipment | 3,414 | 3,176 | ||||||||||||
| Computer software | 13,960 | 11,009 | ||||||||||||
| Leasehold improvements | 68,050 | 58,277 | ||||||||||||
| Construction in progress | 19,828 | 20,116 | ||||||||||||
| $ | 217,137 | $ | 197,277 | |||||||||||
| Less: Accumulated depreciation and amortization | (105,911) | (94,994) | ||||||||||||
| $ | 111,226 | $ | 102,283 | |||||||||||
| (in thousands) | March 31, 2026 | September 30, 2025 | ||||||||||||
| Accrued Expenses | $ | 24,873 | $ | 22,824 | ||||||||||
| Litigation accruals | 20,641 | 229 | ||||||||||||
| Liability for issuance of shares of common stock | 8,750 | — | ||||||||||||
| Income and other taxes payable | 4,976 | 4,543 | ||||||||||||
| Contract liabilities | 7,095 | 6,884 | ||||||||||||
| Other current liabilities | 1,513 | 722 | ||||||||||||
| $ | 67,848 | $ | 35,202 | |||||||||||
| (in thousands) | March 31, 2026 | |||||||
| Balance at beginning of period | $ | 82,195 | ||||||
| Balance at end of period | $ | 82,195 | ||||||
| March 31, 2026 | ||||||||||||||||||||||||||
| (in thousands, except for years) | Weighted average Amortization period in years | Gross carrying amount | Accumulated amortization | Net book value | ||||||||||||||||||||||
| Developed Technology | 17 | $ | 18,000 | $ | (5,004) | $ | 12,996 | |||||||||||||||||||
| Total finite-lived intangible assets | $ | 18,000 | $ | (5,004) | $ | 12,996 | ||||||||||||||||||||
| September 30, 2025 | ||||||||||||||||||||||||||
| (in thousands, except for years) | Weighted average Amortization period in years | Gross carrying amount | Accumulated amortization | Net book value | ||||||||||||||||||||||
| Developed Technology | 17 | $ | 17,900 | $ | (4,475) | $ | 13,425 | |||||||||||||||||||
| Total finite-lived intangible assets | $ | 17,900 | $ | (4,475) | $ | 13,425 | ||||||||||||||||||||
| (in thousands) | Operating leases | Sublease income | ||||||||||||
| Years ending September 30: | ||||||||||||||
| Remainder of 2026 | $ | 6,190 | $ | 959 | ||||||||||
| 2027 | 8,450 | 1,975 | ||||||||||||
| 2028 | 12,572 | 2,035 | ||||||||||||
| 2029 | 10,793 | — | ||||||||||||
| 2030 | 11,096 | — | ||||||||||||
| 2031 | 11,409 | — | ||||||||||||
| Thereafter | 90,605 | — | ||||||||||||
| Total minimum lease payments | $ | 151,115 | $ | 4,969 | ||||||||||
| Less: imputed interest | (55,274) | |||||||||||||
| Total operating lease liabilities | $ | 95,841 | ||||||||||||
| Less: current portion | (10,443) | |||||||||||||
| Operating lease liabilities, net of current portion | $ | 85,398 | ||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands except years and percentage) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| Operating lease costs | $ | 3,347 | $ | 3,738 | $ | 6,903 | $ | 7,477 | ||||||||||||||||||
| Variable lease costs | $ | 2,058 | $ | 1,888 | $ | 4,130 | $ | 3,808 | ||||||||||||||||||
| Sublease income | $ | 681 | $ | — | $ | 1,419 | $ | — | ||||||||||||||||||
| Weighted-average remaining lease term (in years) - operating leases | 14.1 | 14.7 | ||||||||||||||||||||||||
| Weighted-average discount rate - operating leases | 6.9 | % | 6.3 | % | ||||||||||||||||||||||
| Six months ended March 31, | ||||||||||||||
| (in thousands) | 2026 | 2025 | ||||||||||||
Cash payments included in the measurement of operating lease liabilities | $ | 7,773 | $ | 7,319 | ||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| Revenue | $ | 2,172 | $ | 2,829 | $ | 3,552 | $ | 6,802 | ||||||||||||||||||
| (in thousands) | March 31, 2026 | September 30, 2025 | ||||||||||||
| Accounts receivable | $ | 774 | $ | 1,265 | ||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| Cost of revenues | $ | 1,691 | $ | 2,074 | $ | 2,967 | $ | 3,280 | ||||||||||||||||||
| Research and development | 2,140 | 3,527 | 3,736 | 6,266 | ||||||||||||||||||||||
| Selling, general and administrative | 15,105 | 14,727 | 25,506 | 22,773 | ||||||||||||||||||||||
| Total stock-based compensation expense | $ | 18,936 | $ | 20,328 | $ | 32,209 | $ | 32,319 | ||||||||||||||||||
| (in thousands, except per share data) | Shares | Weighted average grant date fair value per share | ||||||||||||
| Nonvested shares at September 30, 2025 | 1,882 | $ | 37.21 | |||||||||||
| Granted | 1,532 | 30.92 | ||||||||||||
| Vested/Issued | (503) | 35.64 | ||||||||||||
| Forfeited | (74) | 37.03 | ||||||||||||
Nonvested shares at March 31, 2026 | 2,837 | $ | 34.00 | |||||||||||
| (in thousands, except per share data) | Shares | Weighted average grant date fair value per share | ||||||||||||
| Nonvested shares at September 30, 2025 | 1,934 | $ | 37.85 | |||||||||||
| Granted | 946 | 27.11 | ||||||||||||
| Vested/Issued | (419) | 22.10 | ||||||||||||
| Forfeited | (41) | 43.33 | ||||||||||||
Nonvested shares at March 31, 2026 | 2,420 | $ | 36.28 | |||||||||||
| (in thousands, except per share and contractual term data) | Shares | Weighted average exercise price per share | Weighted average remaining contractual term (years) | Aggregate intrinsic value | ||||||||||||||||||||||
| Outstanding at September 30, 2025 | 1,276 | $ | 30.80 | 3.59 | $ | 6,616 | ||||||||||||||||||||
| Forfeited | (2) | 69.87 | — | — | ||||||||||||||||||||||
| Exercised | (93) | 22.44 | — | 2,232 | ||||||||||||||||||||||
| Outstanding at March 31, 2026 | 1,181 | $ | 31.40 | 3.11 | $ | 24,803 | ||||||||||||||||||||
Vested and exercisable at March 31, 2026 | 1,181 | $ | 31.40 | 3.11 | $ | 24,803 | ||||||||||||||||||||
| (in thousands) | Shares available | |||||||
As of September 30, 2025 | 716 | |||||||
| Additional shares authorized | 249 | |||||||
| Shares issued during the period | (104) | |||||||
As of March 31, 2026 | 861 | |||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands, except per share data) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| Net loss, basic and diluted | $ | (44,021) | $ | (39,328) | $ | (74,528) | $ | (70,922) | ||||||||||||||||||
| Weighted average shares used in computing net loss per share, basic and diluted | 61,702 | 59,649 | 61,387 | 59,403 | ||||||||||||||||||||||
| Net loss per share, basic and diluted | $ | (0.71) | $ | (0.66) | $ | (1.21) | $ | (1.19) | ||||||||||||||||||
| Six months ended March 31, | ||||||||||||||
| (in thousands) | 2026 | 2025 | ||||||||||||
| Shares subject to options (including performance options) to purchase common stock | 1,181 | 1,593 | ||||||||||||
| Unvested restricted stock units and performance stock units | 5,257 | 4,514 | ||||||||||||
| Shares subject to employee stock purchase plan | 64 | 83 | ||||||||||||
| Total | 6,502 | 6,190 | ||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| Revenues | $ | 110,715 | $ | 92,793 | $ | 214,413 | $ | 181,506 | ||||||||||||||||||
| Costs and expenses: | ||||||||||||||||||||||||||
Cost of revenues[1] | $ | 47,402 | $ | 40,373 | $ | 91,408 | $ | 80,744 | ||||||||||||||||||
Research and development expenses[1] | 17,366 | 19,952 | 32,712 | 38,078 | ||||||||||||||||||||||
Selling, general and administrative expenses[1] | 59,255 | 47,298 | 117,034 | 93,786 | ||||||||||||||||||||||
| Litigation settlement costs, net of recoveries | 7,205 | — | 7,205 | — | ||||||||||||||||||||||
| Depreciation and amortization | 6,414 | 6,402 | 12,608 | 12,784 | ||||||||||||||||||||||
| Stock-based compensation expense | 18,936 | 20,328 | 32,209 | 32,319 | ||||||||||||||||||||||
| Total costs and expenses | $ | 156,578 | $ | 134,353 | $ | 293,176 | $ | 257,711 | ||||||||||||||||||
| Loss from operations | $ | (45,863) | $ | (41,560) | $ | (78,763) | $ | (76,205) | ||||||||||||||||||
| Interest income | $ | 1,710 | $ | 2,801 | $ | 3,885 | $ | 6,041 | ||||||||||||||||||
| Other income (expense), net | 175 | (394) | 646 | (487) | ||||||||||||||||||||||
| Income (loss) before income taxes | $ | (43,978) | $ | (39,153) | $ | (74,232) | $ | (70,651) | ||||||||||||||||||
| Income tax expense | (43) | (175) | (296) | (271) | ||||||||||||||||||||||
| Net loss | $ | (44,021) | $ | (39,328) | $ | (74,528) | $ | (70,922) | ||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||||||||||||||||||||||||||
| (in thousands, except percentages) | 2026 | 2025 | Change | % | 2026 | 2025 | Change | % | ||||||||||||||||||||||||||||||||||||||||||
| Revenues | $ | 110,715 | $ | 92,793 | $ | 17,922 | 19 | % | $ | 214,413 | $ | 181,506 | $ | 32,907 | 18 | % | ||||||||||||||||||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||||||||||||||||||||||||||
| (in thousands, except percentages) | 2026 | % | 2025 | % | 2026 | % | 2025 | % | ||||||||||||||||||||||||||||||||||||||||||
| Americas | $ | 64,307 | 58 | % | $ | 55,189 | 59 | % | $ | 122,688 | 57 | % | $ | 108,899 | 60 | % | ||||||||||||||||||||||||||||||||||
| EMEA | 37,347 | 34 | % | 30,642 | 33 | % | 75,712 | 35 | % | 58,945 | 32 | % | ||||||||||||||||||||||||||||||||||||||
| APAC | 9,061 | 8 | % | 6,962 | 8 | % | 16,013 | 8 | % | 13,662 | 8 | % | ||||||||||||||||||||||||||||||||||||||
| Total revenues | $ | 110,715 | 100 | % | $ | 92,793 | 100 | % | $ | 214,413 | 100 | % | $ | 181,506 | 100 | % | ||||||||||||||||||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||||||||||||||||||||||||||
| (in thousands, except percentages) | 2026 | % | 2025 | % | 2026 | % | 2025 | % | ||||||||||||||||||||||||||||||||||||||||||
| Therapeutics | $ | 40,766 | 37 | % | $ | 26,250 | 28 | % | $ | 77,991 | 36 | % | $ | 53,022 | 29 | % | ||||||||||||||||||||||||||||||||||
| Diagnostics | 39,960 | 36 | % | 35,030 | 38 | % | 75,275 | 35 | % | 70,513 | 39 | % | ||||||||||||||||||||||||||||||||||||||
| Industry and applied | 5,797 | 5 | % | 7,043 | 8 | % | 11,918 | 6 | % | 12,570 | 7 | % | ||||||||||||||||||||||||||||||||||||||
| Academic research and government | 12,816 | 12 | % | 12,469 | 13 | % | 25,033 | 12 | % | 24,865 | 14 | % | ||||||||||||||||||||||||||||||||||||||
| Global supply partners | 11,376 | 10 | % | 12,001 | 13 | % | 24,196 | 11 | % | 20,536 | 11 | % | ||||||||||||||||||||||||||||||||||||||
| Total revenues | $ | 110,715 | 100 | % | $ | 92,793 | 100 | % | $ | 214,413 | 100 | % | $ | 181,506 | 100 | % | ||||||||||||||||||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||
| (in thousands) | 2026 | 2025 | 2026 | 2025 | ||||||||||||||||||||||
| Number of genes shipped | 300 | 227 | 571 | 432 | ||||||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||||||||||||||||||||||||||
| (in thousands, except percentages) | 2026 | 2025 | Change | % | 2026 | 2025 | Change | % | ||||||||||||||||||||||||||||||||||||||||||
| Cost of revenues | $ | 53,593 | $ | 46,765 | $ | 6,828 | 15 | % | $ | 103,319 | $ | 92,638 | $ | 10,681 | 12 | % | ||||||||||||||||||||||||||||||||||
| Gross profit | $ | 57,122 | $ | 46,028 | $ | 11,094 | 24 | % | $ | 111,094 | $ | 88,868 | $ | 22,226 | 25 | % | ||||||||||||||||||||||||||||||||||
| Gross margin | 51.6 | % | 49.6 | % | 2.0 | % | 51.8 | % | 49.0 | % | 2.8 | % | ||||||||||||||||||||||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||||||||||||||||||||||||||
| (in thousands, except percentages) | 2026 | 2025 | Change | % | 2026 | 2025 | Change | % | ||||||||||||||||||||||||||||||||||||||||||
| Research and development | $ | 19,695 | $ | 23,917 | $ | (4,222) | (18) | % | $ | 36,825 | $ | 45,224 | $ | (8,399) | (19) | % | ||||||||||||||||||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||||||||||||||||||||||||||
| (in thousands, except percentages) | 2026 | 2025 | Change | % | 2026 | 2025 | Change | % | ||||||||||||||||||||||||||||||||||||||||||
| Selling, general and administrative | $ | 76,085 | $ | 63,671 | $ | 12,414 | 19 | % | $ | 145,827 | $ | 119,849 | $ | 25,978 | 22 | % | ||||||||||||||||||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||||||||||||||||||||||||||
| (in thousands, except percentages) | 2026 | 2025 | Change | % | 2026 | 2025 | Change | % | ||||||||||||||||||||||||||||||||||||||||||
| Litigation settlement costs, net of recoveries | $ | 7,205 | $ | — | $ | 7,205 | NA | $ | 7,205 | $ | — | $ | 7,205 | NA | ||||||||||||||||||||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||||||||||||||||||||||||||
| (in thousands, except percentages) | 2026 | 2025 | Change | % | 2026 | 2025 | Change | % | ||||||||||||||||||||||||||||||||||||||||||
| Interest income | $ | 1,710 | $ | 2,801 | $ | (1,091) | (39) | % | $ | 3,885 | $ | 6,041 | $ | (2,156) | (36) | % | ||||||||||||||||||||||||||||||||||
| Other income (expense), net | 175 | (394) | 569 | (144) | % | 646 | (487) | 1,133 | (233) | % | ||||||||||||||||||||||||||||||||||||||||
| Total interest and other income (expense), net | $ | 1,885 | $ | 2,407 | $ | (522) | (22) | % | $ | 4,531 | $ | 5,554 | $ | (1,023) | (18) | % | ||||||||||||||||||||||||||||||||||
| Three months ended March 31, | Six months ended March 31, | |||||||||||||||||||||||||||||||||||||||||||||||||
| (in thousands, except percentages) | 2026 | 2025 | Change | % | 2026 | 2025 | Change | % | ||||||||||||||||||||||||||||||||||||||||||
| Income tax expense | $ | (43) | $ | (175) | $ | 132 | (75) | % | $ | (296) | $ | (271) | $ | (25) | 9 | % | ||||||||||||||||||||||||||||||||||
| Six months ended March 31, | ||||||||||||||
| (in thousands) | 2026 | 2025 | ||||||||||||
| Net cash used in operating activities | $ | (42,373) | $ | (34,414) | ||||||||||
| Net cash provided by (used in) investing activities | (22,639) | (2,962) | ||||||||||||
| Net cash provided by financing activities | 4,436 | 21,140 | ||||||||||||
| Exhibit Number | Description | Filed / Furnished / Incorporated from Form | Incorporated by Reference from Exhibit Number | Date Filed | ||||||||||||||||
| 4.1 | 8-K | 4.1 | 2/17/2026 | |||||||||||||||||
| 31.1 | Filed herewith | |||||||||||||||||||
| 31.2 | Filed herewith | |||||||||||||||||||
| 32.1† | Furnished herewith | |||||||||||||||||||
| 32.2† | Furnished herewith | |||||||||||||||||||
| 101 | The following materials from Twist Bioscience Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, formatted in iXBRL (inline eXtensible Business Reporting Language): (i) the Condensed Consolidated Balance Sheets, (ii) the Condensed Consolidated Statements of Operations and Comprehensive Loss, (iii) the Condensed Consolidated Statements of Stockholders’ Equity, (iv) the Condensed Consolidated Statements of Cash Flows, and (v) Notes to Unaudited Condensed Consolidated Financial Statements, tagged as blocks of text. | Filed herewith | ||||||||||||||||||
| 104 | The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, formatted in Inline XBRL (included in Exhibit 101). | Filed herewith | ||||||||||||||||||
| † | The certifications attached as Exhibits 32.1 and 32.2 that accompany this Quarterly Report on Form 10-Q are not deemed filed with the SEC and are not to be incorporated by reference into any filing of Twist Bioscience Corporation under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date of this Quarterly Report on Form 10-Q, regardless of any general incorporation language contained in any filing. | ||||
| May 4, 2026 | Twist Bioscience Corporation | |||||||
| By: | /s/ Adam Laponis | |||||||
| Adam Laponis | ||||||||
| Chief Financial Officer | ||||||||
| (Authorized officer) | ||||||||
| /s/ Emily M. Leproust | |||||
| Emily M. Leproust | |||||
| Chief Executive Officer | |||||
| (Principal Executive Officer) | |||||
| /s/ Adam Laponis | |||||
| Adam Laponis | |||||
| Chief Financial Officer | |||||
| /s/ Emily M. Leproust | |||||
| Emily M. Leproust | |||||
| Chief Executive Officer | |||||
| (Principal Executive Officer) | |||||
| /s/ Adam Laponis | |||||
| Adam Laponis | |||||
| Chief Financial Officer | |||||