| Assets | — | — |
| Current assets | — | — |
| Cash and cash equivalents | 435,449a | 121,626a |
| Marketable securities | 206,819a | 1,474a |
| Prepaid expenses and other current assets | 17,011a | 6,275a |
| Total current assets | 659,279a | 129,375a |
| Property and equipment, net | 5,398a | 4,780a |
| Right-of-use assets | 24,615a | 28,612a |
| Restricted cash | 1,942a | 2,315a |
| Total assets | 691,234a | 165,082a |
| Liabilities and stockholders’ equity | — | — |
| Current liabilities | — | — |
| Accounts payable | 6,562a | 22,936a |
| Accrued expenses and other current liabilities | 30,846a | 23,439a |
| Lease liabilities | 4,850a | 4,720a |
| Total current liabilities | 42,258a | 51,095a |
| Lease liabilities, net of current portion | 19,138a | 22,695a |
| Total liabilities | 61,396a | 73,790a |
| Stockholders’ equity | — | — |
| Preferred stock | 0a | 0a |
| Common stock | 10a | 6a |
| Additional paid-in capital | 1,579,750a | 723,796a |
| Accumulated other comprehensive loss | 6a | 0a |
| Accumulated deficit | -949,928a | -632,510a |
| Total stockholders’ equity | 629,838a | 91,292a |
| Total liabilities and stockholders’ equity | 691,234a | 165,082a |