Senti Biosciences Holdings's top three insider shareholders as of September 29, 2026 are Partners Spv 24 Celadon (TenPercentOwner, 9.78Mn shares), Enterprise Associates 15, L.P. New (TenPercentOwner, 3.78Mn shares), Healthcare Llc Bayer (TenPercentOwner, 2.81Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Partners Spv 24 Celadon | TenPercentOwner | 9,777,000 | 0 | 9,777,000 | 54.4% | 14 Mar, 2025 |
| 2 | Enterprise Associates 15, L.P. New | TenPercentOwner | 3,775,615 | 0 | 3,775,615 | 21.0% | 12 Mar, 2025 |
| 3 | Healthcare Llc Bayer | TenPercentOwner | 2,809,848 | 0 | 2,809,848 | 15.6% | 12 Mar, 2025 |
| 4 | Omid Farokhzad | Director | 0 | 866,290 | 866,290 | 4.8% | 10 Jun, 2022 |
| 5 | Timothy K Lu | Ceo | 639,583 | 0 | 639,583 | 3.6% | 09 Mar, 2026 |
| 6 | Kanya Rajangam | Pres. Chief Med. Dev. Off. | 74,843 | 0 | 74,843 | 0.4% | 09 Mar, 2026 |
| 7 | Deborah Knobelman | Chief Financial Officer | 13,100 | 0 | 13,100 | 0.1% | 02 Feb, 2024 |
| 8 | David R Epstein | Director | 12,325 | 0 | 12,325 | 0.1% | 10 Jun, 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 Mar, 2026 | Kanya Rajangam | Pres. Chief Med. Dev. Off. | Disposed F | 10,757 | $0.00 | $0 | 74,843 | Direct |
| 09 Mar, 2026 | Timothy K Lu | Ceo | Disposed F | 80,666 | $0.00 | $0 | 639,583 | Direct |
| 02 Feb, 2026 | Kanya Rajangam | Pres. Chief Med. Dev. Off. | Disposed F | 1,384 | $0.00 | $0 | 85,600 | Direct |
| 02 Feb, 2026 | Timothy K Lu | Ceo | Disposed F | 4,191 | $0.00 | $0 | 720,249 | Direct |
| 18 Jul, 2025 | Bryan Daniel Baum | Director | Acquired A | 43,900 | $0.00 | $0 | 43,900 | Direct |
| 25 Jun, 2025 | Edward T Mathers | Director | Acquired A | 21,950 | $0.00 | $0 | 21,950 | Direct |
| 25 Jun, 2025 | James J. Collins | Director | Acquired A | 21,950 | $0.00 | $0 | 21,950 | Direct |
| 25 Jun, 2025 | Fran Schulz | Director | Acquired A | 21,950 | $0.00 | $0 | 21,950 | Direct |
| 25 Jun, 2025 | Donald F Tang | Director | Acquired A | 21,950 | $0.00 | $0 | 21,950 | Direct |
| 25 Jun, 2025 | Feng Hsiung | Director | Acquired A | 21,950 | $0.00 | $0 | 21,950 | Direct |
| 25 Jun, 2025 | Brenda Cooperstone | Director | Acquired A | 21,950 | $0.00 | $0 | 21,950 | Direct |
| 10 Mar, 2025 | Partners Spv 24 Celadon | TenPercentOwner | Acquired C | 9,777,000 | — | — | 9,777,000 | Direct |
| 10 Mar, 2025 | Partners Spv 24 Celadon | TenPercentOwner | Disposed C | 9,777 | — | — | 0 | Direct |
| 10 Mar, 2025 | Healthcare Llc Bayer | TenPercentOwner | Acquired C | 2,222,000 | — | — | 2,809,848 | Direct |
| 10 Mar, 2025 | Enterprise Associates 15, L.P. New | TenPercentOwner | Acquired C | 3,333,000 | — | — | 3,775,615 | Direct |
| 10 Mar, 2025 | Enterprise Associates 15, L.P. New | TenPercentOwner | Disposed C | 3,333 | — | — | 0 | Direct |
| 10 Mar, 2025 | Healthcare Llc Bayer | TenPercentOwner | Disposed C | 2,222 | — | — | 0 | Direct |
| 07 Mar, 2025 | John Harry Iii Cross | Chief Financial Officer | Acquired A | 174,200 | $0.00 | $0 | 174,200 | Direct |
| 07 Mar, 2025 | James J. Collins | Director | Acquired A | 43,900 | $0.00 | $0 | 43,900 | Direct |
| 07 Mar, 2025 | Edward T Mathers | Director | Acquired A | 43,900 | $0.00 | $0 | 43,900 | Direct |