The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Mar 23, 2023 | Klassen Preston | Director | Grant(A) | 842K | $0.47 | $396K |
| Mar 23, 2023 | Klassen Preston | Director | Disposed to issuer(D) | 842K | — | $0 |
| Jan 26, 2023 | Klassen Preston | President & CEO, Director | Sell(S) | 381K | $0.41 | $156K |
| Jan 26, 2023 | York Michael | Chief Business Officer | Sell(S) | 107K | $0.41 | $44K |
| Dec 21, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 120K | $0.40 | $48K |
| Dec 20, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 50K | $0.38 | $19K |
| Dec 19, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 101K | $0.40 | $41K |
| Nov 9, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 40K | $0.39 | $16K |
| Nov 8, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 500 | $0.40 | $200 |
| Nov 7, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 124K | $0.42 | $52K |
| Oct 28, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 45K | $0.40 | $18K |
| Oct 27, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 768K | $0.39 | $299K |
| Oct 26, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 589K | $0.35 | $206K |
| Oct 25, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 499K | $0.35 | $175K |
| Oct 24, 2022 | Leonard Braden Michael | 10% Owner | Buy(P) | 174K | $0.34 | $59K |
| May 18, 2022 | Guggenhime Andrew | Director | Grant(A) | 17K | — | $0 |
| May 18, 2022 | Evans Ronald M | Director | Grant(A) | 17K | — | $0 |
| May 18, 2022 | Heyman Richard A. | Director | Grant(A) | 17K | — | $0 |
| May 18, 2022 | Owens Julia C. | Director | Grant(A) | 17K | — | $0 |
| May 18, 2022 | McHutchison John G | Director | Grant(A) | 17K | — | $0 |
| May 18, 2022 | Jonker Jeffrey David | Director | Grant(A) | 17K | — | $0 |
| May 18, 2022 | Nashat Amir | Director, 10% Owner | Grant(A) | 17K | — | $0 |
| Apr 19, 2022 | Klassen Preston | President & CEO, Director | Sell(S) | 44K | $0.50 | $22K |
| Apr 19, 2022 | Klassen Preston | President & CEO, Director | Sell(S) | 1K | $0.51 | $598 |
| Apr 14, 2022 | Klassen Preston | President & CEO, Director | Grant(A) | 105K | — | $0 |
| Feb 27, 2022 | York Michael | Chief Business Officer | Grant(A) | 211K | — | $0 |
| Feb 27, 2022 | York Michael | Chief Business Officer | Grant(A) | 211K | — | $0 |
| Feb 27, 2022 | Klassen Preston | President & CEO, Director | Grant(A) | 842K | — | $0 |
| Feb 27, 2022 | Klassen Preston | President & CEO, Director | Grant(A) | 842K | — | $0 |
| Dec 22, 2021 | New Enterprise Associates 16, L.P. | 10% Owner | Sell(S) | 289K | $1.00 | $289K |
| Dec 22, 2021 | New Enterprise Associates 16, L.P. | 10% Owner | Sell(S) | 171K | $0.91 | $156K |
| Dec 22, 2021 | Baskett Forest | 10% Owner | Sell(S) | 289K | $1.00 | $289K |
| Dec 22, 2021 | Baskett Forest | 10% Owner | Sell(S) | 171K | $0.91 | $156K |
| Dec 22, 2021 | Chang Carmen | 10% Owner | Sell(S) | 171K | $0.91 | $156K |
| Dec 22, 2021 | Chang Carmen | 10% Owner | Sell(S) | 289K | $1.00 | $289K |
| Dec 22, 2021 | Florence Anthony A. Jr. | 10% Owner | Sell(S) | 171K | $0.91 | $156K |
| Dec 22, 2021 | Florence Anthony A. Jr. | 10% Owner | Sell(S) | 289K | $1.00 | $289K |
| Dec 22, 2021 | Makhzoumi Mohamad | 10% Owner | Sell(S) | 171K | $0.91 | $156K |
| Dec 22, 2021 | Makhzoumi Mohamad | 10% Owner | Sell(S) | 289K | $1.00 | $289K |
| Dec 22, 2021 | Sandell Scott D | 10% Owner | Sell(S) | 289K | $1.00 | $289K |
| Dec 22, 2021 | Sandell Scott D | 10% Owner | Sell(S) | 171K | $0.91 | $156K |
| Dec 22, 2021 | Sonsini Peter W. | 10% Owner | Sell(S) | 289K | $1.00 | $289K |
| Dec 22, 2021 | Sonsini Peter W. | 10% Owner | Sell(S) | 171K | $0.91 | $156K |
| Dec 22, 2021 | Walker Paul Edward | 10% Owner | Sell(S) | 171K | $0.91 | $156K |
| Dec 22, 2021 | Walker Paul Edward | 10% Owner | Sell(S) | 289K | $1.00 | $289K |
| Dec 10, 2021 | New Enterprise Associates 16, L.P. | 10% Owner | Sell(S) | 38K | $1.32 | $50K |
| Dec 10, 2021 | Baskett Forest | 10% Owner | Sell(S) | 38K | $1.32 | $50K |
| Dec 10, 2021 | Chang Carmen | 10% Owner | Sell(S) | 38K | $1.32 | $50K |
| Dec 10, 2021 | Florence Anthony A. Jr. | 10% Owner | Sell(S) | 38K | $1.32 | $50K |
| Dec 10, 2021 | Makhzoumi Mohamad | 10% Owner | Sell(S) | 38K | $1.32 | $50K |
| Dec 10, 2021 | Sandell Scott D | 10% Owner | Sell(S) | 38K | $1.32 | $50K |
| Dec 10, 2021 | Sonsini Peter W. | 10% Owner | Sell(S) | 38K | $1.32 | $50K |
| Dec 10, 2021 | Walker Paul Edward | 10% Owner | Sell(S) | 38K | $1.32 | $50K |
| Oct 25, 2021 | venBio Global Strategic GP, L.P. | 10% Owner | Sell(S) | 541K | $1.49 | $806K |
| Oct 22, 2021 | venBio Global Strategic GP, L.P. | 10% Owner | Sell(S) | 75K | $1.64 | $123K |
| May 24, 2021 | Nashat Amir | Director, 10% Owner | Grant(A) | 17K | — | $0 |
| May 24, 2021 | Heyman Richard A. | Director | Grant(A) | 17K | — | $0 |
| May 24, 2021 | Jonker Jeffrey David | Director | Grant(A) | 17K | — | $0 |
| May 24, 2021 | Burow Kristina | Director | Grant(A) | 17K | — | $0 |
| May 24, 2021 | Evans Ronald M | Director | Grant(A) | 17K | — | $0 |
| May 24, 2021 | Owens Julia C. | Director | Grant(A) | 17K | — | $0 |
| May 24, 2021 | Guggenhime Andrew | Director | Grant(A) | 17K | — | $0 |
| May 24, 2021 | McHutchison John G | Director | Grant(A) | 17K | — | $0 |
| May 20, 2021 | Klassen Preston | President & CEO, Director | Buy(P) | 21K | $3.64 | $75K |
| May 20, 2021 | Chen Hubert C | Chief Medical Officer | Buy(P) | 3K | $3.60 | $12K |
| May 5, 2021 | Lee Catherine Chai-zon | EVP, Gen. Counsel & Secretary | Grant(A) | 4K | — | — |
| May 5, 2021 | Millican Trisha | Chief Financial Officer | Grant(A) | 759 | — | — |
| Apr 1, 2021 | Owens Julia C. | Director | Grant(A) | 33K | — | $0 |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Coverage: Form 4 filings indexed 2021-03-29 → 2026-07-14. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).