GEVO's three largest insider shareholders as of September 29, 2026 are Patrick R. Gruber (Chief Executive Officer, 3.32Mn shares), Paul D Bloom (Ceo, 1.50Mn shares), Christopher Michael Ryan (President Coo, 1.28Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Patrick R. Gruber | Chief Executive Officer | 3,320,455 | 0 | 3,320,455 | 25.1% | 04 Sep, 2026 |
| 2 | Paul D Bloom | Ceo | 1,500,789 | 0 | 1,500,789 | 11.4% | 04 Sep, 2026 |
| 3 | Christopher Michael Ryan | President Coo | 1,279,245 | 0 | 1,279,245 | 9.7% | 15 Jun, 2026 |
| 4 | L Lynn Smull | Evp | 1,102,131 | 0 | 1,102,131 | 8.3% | 06 Aug, 2025 |
| 5 | Timothy J Cesarek | Chief Commercial Officer | 946,304 | 0 | 946,304 | 7.2% | 25 Aug, 2023 |
| 6 | Kimberly T Bowron | Chief Of Staff | 684,817 | 0 | 684,817 | 5.2% | 04 Sep, 2026 |
| 7 | Oluwagbemileke Yusuf Agiri | Cfo | 472,893 | 0 | 472,893 | 3.6% | 07 Aug, 2026 |
| 8 | Geoffrey Thomas Jr. Williams | Vp General Counsel Secretary | 455,530 | 0 | 455,530 | 3.4% | 04 Aug, 2023 |
| 9 | Gary W. Mize | Director | 351,226 | 0 | 351,226 | 2.7% | 29 May, 2026 |
| 10 | Andrew Marsh | Director | 343,669 | 0 | 343,669 | 2.6% | 29 May, 2026 |
| 11 | Andrew Shafer | Chief Mktg Cust Brnd Officer | 311,608 | 0 | 311,608 | 2.4% | 15 Jun, 2026 |
| 12 | Carol Jane Battershell | Director | 278,265 | 0 | 278,265 | 2.1% | 14 Nov, 2025 |
| 13 | David Michael Kettner | Chief Legal Emrg Biz Officer | 276,788 | 0 | 276,788 | 2.1% | 24 Aug, 2026 |
| 14 | Lindsay Clinton Fitzgerald | Chief Advocacy Officer | 271,650 | 0 | 271,650 | 2.1% | 22 May, 2026 |
| 15 | Kyle Dean James | Chief Commercial Officer | 266,448 | 0 | 266,448 | 2.0% | 22 May, 2026 |
| 16 | Jaime Guillen | Director | 264,046 | 0 | 264,046 | 2.0% | 29 May, 2026 |
| 17 | Ruth Dreessen | Director | 245,532 | 0 | 245,532 | 1.9% | 07 Jun, 2022 |
| 18 | William H Baum | Director | 218,679 | 0 | 218,679 | 1.7% | 25 Aug, 2023 |
| 19 | Alisher K Nurmat | Vp And Treasurer | 192,476 | 0 | 192,476 | 1.5% | 07 Aug, 2024 |
| 20 | Mary Kathryn Ellet | Director | 132,821 | 0 | 132,821 | 1.0% | 29 May, 2026 |
| 21 | James J Barber | Director | 120,000 | 0 | 120,000 | 0.9% | 24 Aug, 2026 |
| 22 | Davaajargal Gendenjamts | Vp Acctg And Treasurer | 108,865 | 0 | 108,865 | 0.8% | 15 Jun, 2026 |
| 23 | Todd Allen Werpy | Director | 62,583 | 0 | 62,583 | 0.5% | 24 Aug, 2026 |
| 24 | Angelo Amorelli | Director | 2,942 | 0 | 2,942 | 0.0% | 15 Oct, 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 |
|---|---|---|---|---|---|---|---|---|
| 03 Sep, 2026 | Patrick R. Gruber | Director | Disposed S | 3,333 | $1.70 | $5.67K | 3,320,455 | Direct |
| 03 Sep, 2026 | Paul D Bloom | Ceo | Disposed S | 1,514 | $1.71 | $2.59K | 1,500,789 | Direct |
| 03 Sep, 2026 | Kimberly T Bowron | Chief Of Staff | Disposed S | 1,221 | $1.71 | $2.09K | 684,817 | Direct |
| 21 Aug, 2026 | David Michael Kettner | Chief Legal Emrg Biz Officer | Acquired P | 12,500 | $1.55 | $19.37K | 276,788 | Direct |
| 20 Aug, 2026 | Todd Allen Werpy | Director | Acquired A | 62,583 | $0.00 | $0 | 62,583 | Direct |
| 21 Aug, 2026 | James J Barber | Director | Acquired P | 50,000 | $1.54 | $77.00K | 120,000 | Direct |
| 13 Aug, 2026 | Paul D Bloom | Ceo | Acquired M | 50,000 | $1.18 | $59.00K | 1,502,303 | Direct |
| 13 Aug, 2026 | Paul D Bloom | Ceo | Disposed M | 50,000 | $0.00 | $0 | 576,618 | Direct |
| 06 Aug, 2026 | Patrick R. Gruber | Director | Disposed S | 247,642 | $1.51 | $373.82K | 3,323,788 | Direct |
| 06 Aug, 2026 | Oluwagbemileke Yusuf Agiri | Cfo | Disposed S | 18,223 | $1.54 | $28.03K | 472,893 | Direct |
| 06 Aug, 2026 | Paul D Bloom | Ceo | Disposed S | 31,096 | $1.55 | $48.07K | 1,452,303 | Direct |
| 06 Aug, 2026 | Kimberly T Bowron | Chief Of Staff | Disposed S | 10,257 | $1.55 | $15.86K | 686,038 | Direct |
| 12 Jun, 2026 | Andrew Shafer | Chief Mktg Cust Brnd Officer | Disposed S | 9,443 | $1.43 | $13.46K | 311,608 | Direct |
| 12 Jun, 2026 | Davaajargal Gendenjamts | Vp Acctg And Treasurer | Disposed S | 4,293 | $1.43 | $6.12K | 108,865 | Direct |
| 12 Jun, 2026 | Christopher Michael Ryan | President Coo | Disposed S | 35,196 | $1.43 | $50.16K | 1,279,245 | Direct |
| 12 Jun, 2026 | Patrick R. Gruber | Director | Disposed S | 157,563 | $1.40 | $220.86K | 3,571,430 | Direct |
| 12 Jun, 2026 | Paul D Bloom | Ceo | Disposed S | 35,189 | $1.43 | $50.15K | 1,483,399 | Direct |
| 12 Jun, 2026 | Kimberly T Bowron | Chief Of Staff | Disposed S | 15,470 | $1.43 | $22.05K | 696,295 | Direct |
| 12 Jun, 2026 | Oluwagbemileke Yusuf Agiri | Cfo | Disposed S | 63,028 | $1.40 | $88.08K | 491,116 | Direct |
| 27 May, 2026 | Patrick R. Gruber | Director | Acquired A | 70,000 | $0.00 | $0 | 3,915,462 | Direct |