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 4, 2026 | McArthur James G | President and CEO, Director | Sell(S) | 131 | $6.33 | $829 |
| Mar 4, 2026 | McArthur James G | President and CEO, Director | Sell(S) | 5K | $6.23 | $32K |
| Mar 4, 2026 | Donnelly Noel | Chief Financial Officer | Sell(S) | 2K | $6.23 | $13K |
| Mar 4, 2026 | Donnelly Noel | Chief Financial Officer | Sell(S) | 52 | $6.33 | $329 |
| Mar 4, 2026 | Streck Paul | EVP, Head of R&D | Sell(S) | 2K | $6.23 | $11K |
| Mar 4, 2026 | Streck Paul | EVP, Head of R&D | Sell(S) | 47 | $6.29 | $296 |
| Mar 1, 2026 | McArthur James G | President and CEO, Director | Grant(A) | 188K | — | $0 |
| Mar 1, 2026 | McArthur James G | President and CEO, Director | Grant(A) | 731K | — | $0 |
| Mar 1, 2026 | Donnelly Noel | Chief Financial Officer | Grant(A) | 77K | — | $0 |
| Mar 1, 2026 | Donnelly Noel | Chief Financial Officer | Grant(A) | 300K | — | $0 |
| Mar 1, 2026 | Streck Paul | EVP, Head of R&D | Grant(A) | 50K | — | $0 |
| Mar 1, 2026 | Streck Paul | EVP, Head of R&D | Grant(A) | 197K | — | $0 |
| Mar 1, 2026 | Kasraian Kasra | Chief Technical Officer | Grant(A) | 35K | — | $0 |
| Mar 1, 2026 | Kasraian Kasra | Chief Technical Officer | Grant(A) | 135K | — | $0 |
| Mar 1, 2026 | Vittiglio Joseph | Chief Business & Legal Officer | Grant(A) | 31K | — | $0 |
| Mar 1, 2026 | Vittiglio Joseph | Chief Business & Legal Officer | Grant(A) | 120K | — | $0 |
| Dec 8, 2025 | Vittiglio Joseph | Chief Business & Legal Officer | Grant(A) | 35K | — | $0 |
| Dec 8, 2025 | Vittiglio Joseph | Chief Business & Legal Officer | Grant(A) | 160K | — | $0 |
| Nov 4, 2025 | Donnelly Noel | Chief Financial Officer | Grant(A) | 203K | — | $0 |
| Nov 4, 2025 | Donnelly Noel | Chief Financial Officer | Disposed to issuer(D) | 203K | — | $0 |
| Nov 4, 2025 | Donnelly Noel | Chief Financial Officer | Grant(A) | 144K | — | $0 |
| Nov 4, 2025 | Donnelly Noel | Chief Financial Officer | Disposed to issuer(D) | 144K | — | $0 |
| Nov 4, 2025 | Donnelly Noel | Chief Financial Officer | Grant(A) | 144K | — | $0 |
| Nov 4, 2025 | Donnelly Noel | Chief Financial Officer | Disposed to issuer(D) | 144K | — | $0 |
| Nov 4, 2025 | Donnelly Noel | Chief Financial Officer | Grant(A) | 169K | — | $0 |
| Nov 4, 2025 | Donnelly Noel | Chief Financial Officer | Disposed to issuer(D) | 169K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Grant(A) | 466K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Disposed to issuer(D) | 41K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Grant(A) | 41K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Disposed to issuer(D) | 41K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Grant(A) | 41K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Disposed to issuer(D) | 41K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Grant(A) | 353K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Disposed to issuer(D) | 353K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Grant(A) | 300K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Disposed to issuer(D) | 300K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Grant(A) | 275K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Disposed to issuer(D) | 275K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Grant(A) | 41K | — | $0 |
| Nov 4, 2025 | McArthur James G | President and CEO, Director | Disposed to issuer(D) | 466K | — | $0 |
| Nov 4, 2025 | Streck Paul | EVP, Head of R&D | Grant(A) | 203K | — | $0 |
| Nov 4, 2025 | Streck Paul | EVP, Head of R&D | Disposed to issuer(D) | 203K | — | $0 |
| Nov 4, 2025 | Streck Paul | EVP, Head of R&D | Grant(A) | 40K | — | $0 |
| Nov 4, 2025 | Streck Paul | EVP, Head of R&D | Disposed to issuer(D) | 40K | — | $0 |
| Sep 30, 2025 | Oxford Science Enterprises plc | Insider | Buy(P) | 200K | $3.20 | $640K |
| Sep 26, 2025 | RA Capital Healthcare Fund LP | Director, 10% Owner | Buy(P) | 9.4M | $3.20 | $30.0M |
| Jun 4, 2025 | Resnick Joshua | Director | Grant(A) | 16K | — | $0 |
| Jun 4, 2025 | Dable Habib J | Director | Grant(A) | 16K | — | $0 |
| Jun 4, 2025 | Keating Laurie | Director | Grant(A) | 16K | — | $0 |
| Jun 4, 2025 | Henson Heidi | Director | Grant(A) | 16K | — | $0 |
| Jun 4, 2025 | Mayer Howard | Director | Grant(A) | 16K | — | $0 |
| Jun 4, 2025 | Kolchinsky Peter | Director, 10% Owner | Grant(A) | 16K | — | $0 |
| May 30, 2025 | Streck Paul | EVP, Head of R&D | Buy(P) | 8K | $1.24 | $10K |
| May 20, 2025 | Kasraian Kasra | Chief Technical Officer | Grant(A) | 17K | — | $0 |
| May 20, 2025 | Kasraian Kasra | Chief Technical Officer | Grant(A) | 75K | — | $0 |
| Apr 17, 2025 | McArthur James G | President and CEO, Director | Buy(P) | 10K | $1.36 | $14K |
| Apr 8, 2025 | McArthur James G | President and CEO, Director | Buy(P) | 42K | $1.15 | $48K |
| Mar 27, 2025 | Wyman Lisa | Director | Grant(A) | 26K | — | $0 |
| Mar 27, 2025 | Finer Mitchell H. | Director | Grant(A) | 26K | — | $0 |
| Mar 3, 2025 | McArthur James G | President and CEO, Director | Grant(A) | 61K | — | $0 |
| Mar 3, 2025 | McArthur James G | President and CEO, Director | Grant(A) | 272K | — | $0 |
| Mar 3, 2025 | Streck Paul | EVP, Head of R&D | Grant(A) | 19K | — | $0 |
| Mar 3, 2025 | Streck Paul | EVP, Head of R&D | Grant(A) | 87K | — | $0 |
| Mar 3, 2025 | Donnelly Noel | Chief Financial Officer | Grant(A) | 23K | — | $0 |
| Mar 3, 2025 | Donnelly Noel | Chief Financial Officer | Grant(A) | 104K | — | $0 |
| Mar 3, 2025 | DeLena Mary Beth | General Counsel | Grant(A) | 13K | — | $0 |
| Mar 3, 2025 | DeLena Mary Beth | General Counsel | Grant(A) | 60K | — | $0 |
| Feb 26, 2025 | Donnelly Noel | Chief Financial Officer | Sell(S) | 2K | $1.68 | $3K |
| Feb 26, 2025 | DeLena Mary Beth | General Counsel | Sell(S) | 1K | $1.68 | $2K |
| Feb 24, 2025 | Donnelly Noel | Chief Financial Officer | Grant(A) | 3K | — | $0 |
| Feb 24, 2025 | DeLena Mary Beth | General Counsel | Grant(A) | 3K | — | $0 |
| Aug 19, 2024 | Streck Paul | EVP, Head of R&D | Grant(A) | 203K | — | $0 |
| Aug 19, 2024 | Streck Paul | EVP, Head of R&D | Grant(A) | 40K | — | $0 |
| Jul 25, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 8K | $10.21 | $77K |
| Jul 25, 2024 | Mellion Michelle L | Chief Medical Officer | Sell(S) | 8K | $18.06 | $137K |
| Jul 25, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 8K | — | $0 |
| Jul 24, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 201 | $10.21 | $2K |
| Jul 24, 2024 | Mellion Michelle L | Chief Medical Officer | Sell(S) | 201 | $18.01 | $4K |
| Jul 24, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 201 | — | $0 |
| Jul 18, 2024 | Mellion Michelle L | Chief Medical Officer | Sell(S) | 13K | $18.20 | $230K |
| Jul 18, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 13K | $10.21 | $129K |
| Jul 18, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 13K | — | $0 |
| Jul 16, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 6K | $10.21 | $60K |
| Jul 16, 2024 | Mellion Michelle L | Chief Medical Officer | Sell(S) | 6K | $18.00 | $106K |
| Jul 16, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 6K | — | $0 |
| Jul 12, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 3K | $10.21 | $34K |
| Jul 12, 2024 | Mellion Michelle L | Chief Medical Officer | Sell(S) | 3K | $18.04 | $59K |
| Jul 12, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 3K | — | $0 |
| Jul 2, 2024 | Mellion Michelle L | Chief Medical Officer | Sell(S) | 37 | $18.07 | $669 |
| Jul 2, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 37 | $10.21 | $378 |
| Jul 2, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 37 | — | $0 |
| Jul 1, 2024 | Mellion Michelle L | Chief Medical Officer | Sell(S) | 875 | $18.01 | $16K |
| Jul 1, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 875 | $10.21 | $9K |
| Jul 1, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 875 | — | $0 |
| Jun 24, 2024 | Mellion Michelle L | Chief Medical Officer | Sell(S) | 9K | $18.19 | $168K |
| Jun 24, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 9K | $10.21 | $95K |
| Jun 24, 2024 | Mellion Michelle L | Chief Medical Officer | Option exercise(M) | 9K | — | $0 |
| Jun 20, 2024 | Dable Habib J | Director | Grant(A) | 13K | — | $0 |
| Jun 20, 2024 | Mayer Howard | Director | Grant(A) | 9K | — | $0 |
| Jun 20, 2024 | Ashton Christopher | Director | Grant(A) | 13K | — | $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.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).