ARCH Venture Fund IX, L.P. (CIK 1666306) reported 3 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-07-06). Recent activity: Buy BOLD (16,000 shares), Sell BOLD (16,000 shares), Buy LYEL (488,090 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-06 | Boundless Bio, Inc. (BOLD) | Insider | Buy | 16,000 | $16,480 |
| 2026-07-06 | Boundless Bio, Inc. (BOLD) | Insider | Sell | 16,000 | $39,840 |
| 2026-03-09 | Lyell Immunopharma, Inc. (LYEL) | Insider | Buy | 488,090 | $12.5M |
Source: SEC Form 4 filings · as of 2026-07-06