| Assets | — | — |
| Current assets | — | — |
| Cash and cash equivalents | 120,256a | 109,966a |
| Marketable securities | 368,488a | 264,915a |
| Accounts receivable | 0a | 15,000a |
| Contract assets | 947a | 3,762a |
| Prepaid expenses and other current assets | 20,577a | 11,674a |
| Total current assets | 510,268a | 405,317a |
| Marketable securities, non-current | 362,159a | 61,434a |
| Property and equipment, net | 50,457a | 48,134a |
| Right-of-use assets, operating leases | 47,407a | 52,945a |
| Other non-current assets | 1,950a | 2,118a |
| Restricted cash | 5,794a | 5,811a |
| Total assets | 978,035a | 575,759a |
| Liabilities and stockholders’ equity | — | — |
| Current liabilities | — | — |
| Accounts payable | 5,989a | 7,075a |
| Accrued expenses | 34,867a | 33,864a |
| Deferred revenue | 13,576a | 37,883a |
| Operating lease liabilities | 11,594a | 5,068a |
| Finance lease liabilities | 1,518a | 1,277a |
| Other current liabilities | 223a | 524a |
| Total current liabilities | 67,767a | 85,691a |
| Non-current liabilities | — | — |
| Deferred revenue, net of current portion | 0a | 16,768a |
| Operating lease liabilities, net of current portion | 72,423a | 77,028a |
| Finance lease liabilities, net of current portion | 2,226a | 1,301a |
| Other non-current liabilities | 0a | 0a |
| Total liabilities | 142,416a | 180,788a |
| Stockholders’ equity | — | — |
| Common stock | 7a | 6a |
| Additional paid-in capital | 1,591,707a | 926,269a |
| Accumulated deficit | -754,610a | -530,752a |
| Accumulated other comprehensive loss | -1,485a | -552a |
| Total stockholders’ equity | 835,619a | 394,971a |
| Total liabilities and stockholders’ equity | 978,035a | 575,759a |