13 insiders reported 14 Form 4 transactions for Jade Biosciences, Inc. (JBIO) over the past 18 months (most recent 2026-02-13). Recent activity: King Andrew James (See Remarks) Buy 41,250 shares, Dahms Bradford D. (Chief Financial Officer) Buy 37,813 shares, Frohlich Tom (Chief Executive Officer) Buy 78,750 shares, Balta Elizabeth (See Remarks) Buy 28,125 shares, Harwin Peter Evan (Director) Buy 1.3M shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-13 | King Andrew James | See Remarks | Buy | 41,250 | $0 |
| 2026-02-13 | Dahms Bradford D. | Chief Financial Officer | Buy | 37,813 | $0 |
| 2026-02-13 | Frohlich Tom | Chief Executive Officer | Buy | 78,750 | $0 |
| 2026-02-13 | Balta Elizabeth | See Remarks | Buy | 28,125 | $0 |
| 2025-10-08 | Harwin Peter Evan | Director | Buy | 1.3M | $12.2M |
| 2025-10-08 | Fairmount Healthcare Fund II L.P. | Director | Buy | 1.3M | $12.2M |
| 2025-10-08 | Fairmount Funds Management LLC | Director | Buy | 1.3M | $12.2M |
| 2025-10-08 | Kiselak Tomas | Director | Buy | 1.3M | $12.2M |
| 2025-10-08 | Fairmount Healthcare Co-Invest IV L.P. | Director | Buy | 1.3M | $12.2M |
| 2025-05-19 | Frohlich Tom | Chief Executive Officer | Buy | 6,000 | $44,400 |
| 2025-04-30 | Shah Rajeev M. | Insider | Buy | 1.1M | $0 |
| 2025-04-30 | RA CAPITAL MANAGEMENT, L.P. | Insider | Buy | 1.1M | $0 |
| 2025-04-30 | Kolchinsky Peter | Insider | Buy | 1.1M | $0 |
| 2025-04-30 | RA Capital Healthcare Fund LP | Insider | Buy | 1.1M | $0 |
Source: SEC Form 4 filings · as of 2026-02-13