Kolchinsky Peter: insider buys
Every open-market stock purchase reported by Kolchinsky Peter to the SEC on Form 4.
Total bought$8.10M
Purchases4
Companies3
Last purchase filedJul 23, 2026
Return on these buys-16%
Kolchinsky Peter has made 4 open-market purchases worth $8.10M in 3 companies since Dec 15, 2025, according to SEC Form 4 filings. The most recent was filed on Jul 23, 2026: 264,586 shares of ARTV at $9.76 (Director, 10% Owner), worth $2.58M. The largest was $4.60M of ARTV on Jun 12, 2026. Taken together, these purchases are down 16% at the latest closing prices (split-adjusted, weighted by amount).
Companies Kolchinsky Peter bought
| Ticker | Company | Role | Buys | Total | Since buy | Last filed |
|---|---|---|---|---|---|---|
| ARTV | Artiva Biotherapeutics, Inc. | Director, 10% Owner | 2 | $7.18M | -54% | Jul 23 |
| CLYM | Climb Bio, Inc. | Director, 10% Owner | 1 | $754.74K | +327% | Dec 15 |
| COAG | Hemab Therapeutics Holdings, Inc. | 10% Owner | 1 | $159.04K | +66% | May 14 |
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| Filed | Stock | Insider | Value | Shares | Price | Since buy | Stake | Trade | |
|---|---|---|---|---|---|---|---|---|---|
| Jul 23 | ARTVArtiva Biotherapeutics, Inc. | Kolchinsky Peter +5Director, 10% Owner | $2.58M | 264,586 | $9.76 | -57% | +2% | Jul 21 | SEC |
| Jun 16 | ARTVArtiva Biotherapeutics, Inc. | Kolchinsky Peter +5Director, 10% Owner | $4.60M | 531,326 | $8.66 | -52% | +3% | Jun 12 | SEC |
| May 14 | COAGHemab Therapeutics Holdings… | Kolchinsky Peter +310% Owner | $159.04K | 6,387 | $24.90 | +66% | +0% | May 12 | SEC |
| Dec 15 | CLYMClimb Bio, Inc. | Kolchinsky Peter +6Director, 10% Owner | $754.74K | 314,561 | $2.40 | +327% | +11% | Dec 11 | SEC |