Reporting owner · CIK 0001384859
Kolchinsky Peter
Visual SEC Form 4 history across 10 companies, 41 transactions and 12 filings.
DIRArtiva Biotherapeutics, Inc.
Open-market mix
100%buys
Open-market buy performance
90-day forward return on this insider's open-market purchases
Forward return is not available yet
We compute this from each buy's stock performance 90 days after the transaction. The price history is still being populated for some of their open-market buys, so the average and median will appear here once the daily price refresh has covered the relevant trading days.
Monthly open-market activity
Reported purchase and sale transaction counts
Buys Sells
Net value flow
Buys minus sells
Jan 25
$50M
Feb 25
$35.2M
Mar 25
$25.3M
Jan 26
$24.9K
Feb 26
$59M
Jun 26
$0
Aug 26
$0
Sep 26
$0
Transaction texture
Ownership and ticket size
Average P/S size$15.4M
Median P/S size$9.3M
Direct0
Indirect41
Sep 08, 2026grant
Filing-only signals
Deterministic matches in this insider's history
Latest Form 4 facts
Quick context from source filings
Latest transaction
buy at SpyGlass Pharma, Inc. on Feb 09, 2026 valued at $3,968,544.
Review SEC filingLatest sale
No open-market insider sale is available.
Associated companies
Visual map of known reporting history
ARTVArtiva Biotherapeutics, Inc.1 transactions · latest Sep 08, 2026, 10:29 PMVORVor Biopharma Inc.2 transactions · latest Aug 26, 2026, 10:28 PMABOSAcumen Pharmaceuticals, Inc.2 transactions · latest Jun 05, 2026, 09:12 PMSGPSpyGlass Pharma, Inc.11 transactions · latest Feb 11, 2026, 10:15 PMCLYMClimb Bio, Inc.1 transactions · latest Jan 07, 2026, 09:55 PMJANXJanux Therapeutics, Inc.4 transactions · latest Mar 07, 2025, 11:05 PMMLYSMineralys Therapeutics, Inc.1 transactions · latest Feb 25, 2025, 02:41 AMSLDBSolid Biosciences Inc.1 transactions · latest Feb 21, 2025, 09:11 PMSIONSionna Therapeutics, Inc.16 transactions · latest Feb 10, 2025, 10:04 PMETNB89bio, Inc.2 transactions · latest Feb 05, 2025, 11:02 PM
| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| SGP | Kolchinsky Peter | DIR | C | 1.15M | — | C | −12.4% | 02/11 | 02/09 | |
| SGP | Kolchinsky Peter | DIR | buy | 248k | $396M | P | −12.4% | 02/11 | 02/09 | |
| SGP | Kolchinsky Peter | DIR | buy | 3.44M | $5.50B | P | −12.4% | 02/11 | 02/09 | |
| SGP | Kolchinsky Peter | DIR | C | 1.80M | — | C | −12.4% | 02/11 | 02/09 | |
| SGP | Kolchinsky Peter | DIR | C | 2.52M | — | C | −12.4% | 02/11 | 02/09 | |
| SGP | Kolchinsky Peter | DIR | grant | 27.4k | $0 | A | −10.6% | 02/09 | 02/05 | |
| CLYM | Kolchinsky Peter | DIR | buy | 7.11k | $2.48M | P | — | 01/07 | 01/05 | |
| JANX | Kolchinsky Peter | DIR | buy | 110k | $341M | P | — | 03/07/2025 | 03/07/2025 | |
| JANX | Kolchinsky Peter | DIR | buy | 372k | $1.14B | P | — | 03/07/2025 | 03/06/2025 | |
| JANX | Kolchinsky Peter | DIR | buy | 37.4k | $117M | P | — | 03/07/2025 | 03/05/2025 |
Kolchinsky Peter Insider Activity FAQ
SEC Form 4 context
Who is Kolchinsky Peter?
Kolchinsky Peter is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001384859.
Which companies has Kolchinsky Peter reported transactions for?
Artiva Biotherapeutics, Inc., Vor Biopharma Inc., Acumen Pharmaceuticals, Inc., SpyGlass Pharma, Inc., Climb Bio, Inc., Janux Therapeutics, Inc., Mineralys Therapeutics, Inc., Solid Biosciences Inc., Sionna Therapeutics, Inc., 89bio, Inc.
When was Kolchinsky Peter's latest insider buy?
buy at SpyGlass Pharma, Inc. on Feb 09, 2026 valued at $3,968,544.
When was Kolchinsky Peter's latest insider sale?
No open-market insider sale is available for this period.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
This version does not calculate win rates, forward returns, benchmark-adjusted returns, or high-conviction scores.