Barinthus Biotherapeutics's top three insider shareholders as of September 29, 2026 are Investment Management Ltd Mg (TenPercentOwner, 5.20Mn shares), Graham Griffiths (Chief Business Officer, 104.21K shares), Christopher Ellis (Chief Operating Officer, 75 shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Investment Management Ltd Mg | TenPercentOwner | 0 | 5,197,349 | 5,197,349 | 98.0% | 03 Oct, 2022 |
| 2 | Graham Griffiths | Chief Business Officer | 104,209 | 0 | 104,209 | 2.0% | 26 Aug, 2022 |
| 3 | Christopher Ellis | Chief Operating Officer | 75 | 0 | 75 | 0.0% | 26 Aug, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 09 Sep, 2026 | Robin Wright | Director | Disposed D | 48,256 | — | — | 0 | Direct |
| 09 Sep, 2026 | Joseph Scheeren | Director | Disposed D | 23,000 | — | — | 0 | Direct |
| 09 Sep, 2026 | Anne M. Phillips | Director | Disposed D | 3,000 | — | — | 0 | Direct |
| 09 Sep, 2026 | Leon Hooftman | Chief Medical Officer | Acquired A | 361,530 | — | — | 361,530 | Direct |
| 09 Sep, 2026 | William Enright | Chief Executive Officer | Disposed D | 728,454 | — | — | 0 | Indirect |
| 09 Sep, 2026 | Karen A Dawes | Director | Disposed D | 1,700 | — | — | 0 | Direct |
| 09 Sep, 2026 | Science Enterprises Plc Oxford | Other | Disposed U | 8,797,770 | $0.11 | $976.55K | 0 | Direct |
| 09 Sep, 2026 | Alex Hammacher | Director | Disposed D | 3,000 | — | — | 0 | Direct |
| 09 Sep, 2026 | Pierre A. Morgon | Director | Disposed D | 10,506 | — | — | 0 | Direct |
| 09 Sep, 2026 | Anne M. Phillips | Director | Disposed D | 34,328 | $0.00 | $0 | 0 | Direct |
| 09 Sep, 2026 | William Enright | Chief Executive Officer | Disposed D | 514,923 | — | — | 0 | Indirect |
| 09 Sep, 2026 | Pierre A. Morgon | Director | Disposed D | 20,394 | $0.00 | $0 | 0 | Direct |
| 09 Sep, 2026 | Robin Wright | Director | Disposed D | 20,394 | $0.00 | $0 | 0 | Direct |
| 09 Sep, 2026 | Alex Hammacher | Director | Disposed D | 34,328 | $0.00 | $0 | 0 | Direct |
| 09 Sep, 2026 | Joseph Scheeren | Director | Disposed D | 34,328 | $0.00 | $0 | 0 | Direct |
| 09 Sep, 2026 | Leon Hooftman | Chief Medical Officer | Disposed D | 361,530 | — | — | 0 | Direct |
| 09 Sep, 2026 | Karen A Dawes | Director | Disposed D | 34,328 | $0.00 | $0 | 0 | Direct |
| 09 Sep, 2026 | William Enright | Chief Executive Officer | Disposed D | 176,130 | $0.00 | $0 | 0 | Direct |
| 09 Sep, 2026 | Alex Hammacher | Director | Disposed D | 18,604 | $0.00 | $0 | 0 | Direct |
| 09 Sep, 2026 | Karen A Dawes | Director | Disposed D | 18,604 | $0.00 | $0 | 0 | Direct |