Nautilus Biotechnology's top three insider shareholders as of September 29, 2026 are Parag Mallick (Chief Scientist, 20.49Mn shares), Equity Partners Bio Ii, L.L.C. Ah (TenPercentOwner, 12.65Mn shares), Sujal M Patel (Ceo, President, And Secretary, 10.37Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Parag Mallick | Chief Scientist | 20,493,392 | 0 | 20,493,392 | 38.4% | 12 May, 2025 |
| 2 | Equity Partners Bio Ii, L.L.C. Ah | TenPercentOwner | 0 | 12,653,917 | 12,653,917 | 23.7% | 04 Jun, 2026 |
| 3 | Sujal M Patel | Ceo, President, And Secretary | 10,366,721 | 0 | 10,366,721 | 19.4% | 04 Mar, 2026 |
| 4 | Advisors Llc Perceptive | Director | 0 | 9,111,151 | 9,111,151 | 17.1% | 09 Dec, 2021 |
| 5 | Matthew S Mcilwain | Director | 459,075 | 0 | 459,075 | 0.9% | 17 Nov, 2021 |
| 6 | Subramanian Sankar | Senior Vp, Product Development | 91,250 | 0 | 91,250 | 0.2% | 27 Sep, 2022 |
| 7 | Anna Mowry | Cfo And Treasurer | 83,000 | 0 | 83,000 | 0.2% | 02 Jun, 2025 |
| 8 | Matthew B. Murphy | General Counsel | 0 | 74,140 | 74,140 | 0.1% | 05 Sep, 2025 |
| 9 | Matthew L. Posard | Director | 50,000 | 0 | 50,000 | 0.1% | 01 Dec, 2021 |
| 10 | Gwen E Weld | Chief People Officer | 30,000 | 0 | 30,000 | 0.1% | 26 Sep, 2022 |
| 11 | Kentaro Suzuki | Chief Marketing Officer | 4,000 | 0 | 4,000 | 0.0% | 10 Nov, 2025 |
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 |
|---|---|---|---|---|---|---|---|---|
| 18 Jun, 2026 | Farzad Nazem | Director | Acquired A | 45,000 | $0.00 | $0 | 45,000 | Direct |
| 18 Jun, 2026 | Melissa B, Epperly | Director | Acquired A | 45,000 | $0.00 | $0 | 45,000 | Direct |
| 18 Jun, 2026 | Matthew L. Posard | Director | Acquired A | 45,000 | $0.00 | $0 | 45,000 | Direct |
| 18 Jun, 2026 | Karen Akinsanya | Director | Acquired A | 45,000 | $0.00 | $0 | 45,000 | Direct |
| 18 Jun, 2026 | Matthew S Mcilwain | Director | Acquired A | 45,000 | $0.00 | $0 | 45,000 | Direct |
| 02 Jun, 2026 | Equity Partners Bio Ii, L.L.C. Ah | TenPercentOwner | Disposed S | 4,615,974 | $2.35 | $10.85Mn | 11,682,032 | Indirect |
| 02 Jun, 2026 | Equity Partners Bio Ii, L.L.C. Ah | TenPercentOwner | Disposed S | 384,026 | $2.35 | $902.46K | 971,885 | Indirect |
| 02 Mar, 2026 | Matthew B. Murphy | General Counsel | Acquired A | 160,000 | $0.00 | $0 | 160,000 | Direct |
| 02 Mar, 2026 | Parag Mallick | Chief Scientist | Acquired A | 280,000 | $0.00 | $0 | 280,000 | Direct |
| 02 Mar, 2026 | Anna Mowry | Cfo And Treasurer | Acquired A | 160,000 | $0.00 | $0 | 160,000 | Direct |
| 02 Mar, 2026 | Subramanian Sankar | Senior Vp, Product Development | Acquired A | 160,000 | $0.00 | $0 | 160,000 | Direct |
| 02 Mar, 2026 | Gwen E Weld | Chief People Officer | Acquired A | 160,000 | $0.00 | $0 | 160,000 | Direct |
| 02 Mar, 2026 | Kentaro Suzuki | Chief Marketing Officer | Acquired A | 160,000 | $0.00 | $0 | 160,000 | Direct |
| 04 Mar, 2026 | Sujal M Patel | Ceo, President, And Secretary | Acquired P | 25,000 | $2.61 | $65.24K | 10,366,721 | Direct |
| 02 Mar, 2026 | Sujal M Patel | Ceo, President, And Secretary | Acquired A | 650,000 | $0.00 | $0 | 650,000 | Direct |
| 06 Nov, 2025 | Kentaro Suzuki | Chief Marketing Officer | Acquired P | 4,000 | $1.49 | $5.96K | 4,000 | Direct |
| 05 Sep, 2025 | Sujal M Patel | Ceo, President, And Secretary | Acquired P | 116,500 | $0.67 | $78.54K | 10,258,221 | Direct |
| 08 Sep, 2025 | Sujal M Patel | Ceo, President, And Secretary | Acquired P | 83,500 | $0.68 | $57.03K | 10,341,721 | Direct |
| 04 Sep, 2025 | Matthew B. Murphy | General Counsel | Acquired P | 20,000 | $0.64 | $12.86K | 74,140 | Indirect |
| 23 Jun, 2025 | Farzad Nazem | Director | Acquired A | 45,000 | $0.00 | $0 | 45,000 | Direct |