🕵️ Centessa Pharmaceuticals PLC ($CNTA)
SEC insider & ownership activity, last 12 months · CIK 1847903 · every row links its SEC filing
Over the last 12 months insiders sold $16.8M with no open-market buying against it. Karen M. Anderson sold $6.5M through a 10b5-1 trading plan in 5 lots (Mar). General Atlantic Cooperatief U.a. trimmed 6.6% → 5.0%. One red-flag 8-K in the window: Delisting notice (3.01), Jun 24, 2026.
🚨 6 signals active —
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 7 sellers, $16.8M (37 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Karen M. Anderson | 0 | – | 5 | $6.5M | Mar 26, 2026 |
| Tia L. Bush | 0 | – | 5 | $4.0M | Nov 17, 2025 |
| Gregory M. Weinhoff | 0 | – | 3 | $2.6M | Mar 26, 2026 |
| Iqbal J. Hussain | 0 | – | 8 | $2.4M | Feb 2, 2026 |
| Accardi Mario Alberto | 0 | – | 8 | $1.2M | Dec 9, 2025 |
| Index Ventures Life VI (JERSEY) L.P. | 0 | – | 2 | – | Jun 24, 2026 |
| Medicxi Ventures Management (JERSEY) Ltd | 0 | – | 6 | – | Jun 24, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Avoro Capital Advisors LLC | 7.4% | 13G | May 15, 2026 | filing ↗ | |
| Behzad Aghazadeh | 7.4% | 13G | May 15, 2026 | filing ↗ | |
| Adage Capital Management, L.P. | 5.8% | 13G | May 13, 2026 | filing ↗ | |
| Robert Atchinson | 5.8% | 13G | May 13, 2026 | filing ↗ | |
| Phillip Gross | 5.8% | 13G | May 13, 2026 | filing ↗ | |
| Pentwater Capital Management LP | 5.3% | 13G | May 15, 2026 | filing ↗ | |
| Matthew Halbower | 5.3% | 13G | May 15, 2026 | filing ↗ | |
| General Atlantic Um B.v. | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| General Atlantic Partners (BERMUDA) IV, L.P. | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| General Atlantic Partners (BERMUDA) EU, L.P. | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| General Atlantic Partners (LUX) SCSP | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| General Atlantic Genpar (LUX) SCSP | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| General Atlantic (LUX) S.A R.L. | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| General Atlantic Genpar (BERMUDA), L.P. | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| GAP (BERMUDA) Limited | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| General Atlantic Cooperatief, L.P. | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| General Atlantic Cooperatief U.a. | 5.0% | 13D | Nov 25, 2025 | filing ↗ | |
| FMR LLC | exited | 13G | Jul 8, 2026 | filing ↗ | |
| Abigail P. Johnson | exited | 13G | Jul 8, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Gregory M. Weinhoff | $676K | Mar 26, 2026 | filing ↗ |
| Karen M. Anderson | $1.2M | Mar 26, 2026 | filing ↗ |
| Karen M. Anderson | $281K | Mar 17, 2026 | filing ↗ |
| Karen M. Anderson | $1.8M | Mar 16, 2026 | filing ↗ |
| Karen M. Anderson | $3.1M | Mar 13, 2026 | filing ↗ |
| Gregory M. Weinhoff | $2.0M | Mar 13, 2026 | filing ↗ |
| Iqbal Hussain | $1.0M | Jan 30, 2026 | filing ↗ |
| Saurabh Saha | $52.6M | Jan 21, 2026 | filing ↗ |
| Saurabh Saha | $60.8M | Jan 2, 2026 | filing ↗ |
| Accardi Mario Alberto | $293K | Dec 9, 2025 | filing ↗ |
| Accardi Mario Alberto | $300K | Dec 8, 2025 | filing ↗ |
| Tia L. Bush | $1.1M | Nov 17, 2025 | filing ↗ |
| Iqbal J. Hussain | $166K | Nov 17, 2025 | filing ↗ |
| Tia L. Bush | $1.0M | Nov 12, 2025 | filing ↗ |
| Accardi Mario Alberto | $200K | Oct 27, 2025 | filing ↗ |
| Iqbal J. Hussain | $136K | Oct 15, 2025 | filing ↗ |
| Tia L. Bush | $840K | Sep 24, 2025 | filing ↗ |
| Accardi Mario Alberto | $180K | Sep 16, 2025 | filing ↗ |
| Iqbal J. Hussain | $131K | Sep 15, 2025 | filing ↗ |
| Tia L. Bush | $550K | Sep 10, 2025 | filing ↗ |
| Iqbal J. Hussain | $440K | Sep 10, 2025 | filing ↗ |
| Tia L. Bush | $496K | Sep 9, 2025 | filing ↗ |
| Accardi Mario Alberto | $140K | Sep 9, 2025 | filing ↗ |
| Iqbal J. Hussain | $400K | Sep 9, 2025 | filing ↗ |
| Iqbal J. Hussain | $103K | Aug 15, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Agreement terminated (1.02) | Jun 24, 2026 | filing ↗ |
| Acquisition or disposition (2.01) | Jun 24, 2026 | filing ↗ |
| Delisting notice (3.01) | Jun 24, 2026 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Jun 24, 2026 | filing ↗ |
| Change of control (5.01) | Jun 24, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 24, 2026 | filing ↗ |
| Other events (8.01) | Jun 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 24, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 12, 2026 | filing ↗ |
| Other events (8.01) | Jun 12, 2026 | filing ↗ |
| Other events (8.01) | May 21, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 31, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 31, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 31, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 9, 2026 | filing ↗ |
| Officer/director changes (5.02) | Dec 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 5, 2025 | filing ↗ |
| Officer/director changes (5.02) | Dec 5, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 5, 2025 | filing ↗ |
| Other events (8.01) | Nov 24, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 24, 2025 | filing ↗ |
| Material agreement (1.01) | Nov 11, 2025 | filing ↗ |
| Other events (8.01) | Nov 11, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 11, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Earnings (2.02) | Aug 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 12, 2025 | filing ↗ |