Based on data from the past 90 days ending February 10, 2026, Aspen Aerogels's three largest insider shareholders are TenPercentOwner River Capital, Llc Wood (12.28Mn shares), TenPercentOwner Industries Inc Koch (3.46Mn shares), President And Ceo Donald R Young (494.01K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| River Capital, Llc Wood | 12,280,426 | 15 May, 2024 | |
| Industries Inc Koch | 3,462,124 | 30 Mar, 2022 | |
| Donald R Young | President And Ceo | 494,011 | 14 Nov, 2025 |
| Robert M. Gervis | 355,182 | 06 Jun, 2022 | |
| Corby C Whitaker | Svp And Sales And Marketing | 153,684 | 11 Mar, 2025 |
| Steven R Mitchell | 146,528 | 01 May, 2025 | |
| John F Fairbanks | Vp And Cfo And Treasurer | 141,277 | 01 Mar, 2022 |
| Kelley Conte | Senior Vice President And Hr | 128,183 | 02 Jun, 2023 |
| Mark L Noetzel | 121,220 | 31 May, 2024 | |
| George L Gould | Chief Technology Officer | 95,381 | 25 Feb, 2022 |
| William P Noglows | 88,987 | 01 May, 2025 | |
| Richard F Reilly | 79,231 | 06 Jun, 2022 | |
| Rebecca Blalock | 63,175 | 31 May, 2024 | |
| Ricardo C. Rodriguez | Cfo & Treasurer | 57,311 | 11 Mar, 2025 |
| Gregg Landes | Svp And Operations And Strat Deve | 51,207 | 11 Mar, 2025 |
| Keith L Schilling | Svp And Technology | 49,797 | 11 Mar, 2025 |
| Virginia Johnson | Clo And Gc And And Secretary | 44,450 | 27 May, 2025 |
| Stephanie Pittman | Chief Human Resources Officer | 42,257 | 08 Sep, 2025 |
| James E Sweetnam | 25,951 | 01 May, 2025 | |
| Kathleen Kool | 23,953 | 01 May, 2025 | |
| Santhosh P Daniel | Chief Accounting Officer | 16,316 | 15 Sep, 2025 |
| Grant Douglas Thoele | Cfo & Treasurer | 14,881 | 03 Oct, 2025 |
| Cari Robinson | 12,246 | 01 May, 2025 | |
| Glenn E. Deegan | Cao And Gc & Corp Secretary | 11,673 | 02 Oct, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 13 Nov, 2025 | Donald R Young | Common Stock | D | 56,845 | $3.23 | 494,011 | D | S |
| 01 Oct, 2025 | Grant Douglas Thoele | Common Stock | A | 10,273 | $0.00 | 14,881 | D | A |
| 30 Sep, 2025 | Glenn E. Deegan | Common Stock | A | 11,673 | $0.00 | 11,673 | D | A |
| 30 Sep, 2025 | Glenn E. Deegan | - | - | 11,673 | D | |||
| 13 Sep, 2025 | Santhosh P Daniel | Common Stock | D | 1,563 | $6.59 | 16,316 | D | F |
| 05 Sep, 2025 | Stephanie Pittman | - | - | 42,257 | D | |||
| 05 Sep, 2025 | Stephanie Pittman | Common Stock | D | 1,581 | $6.61 | 42,257 | D | F |
| 13 Aug, 2025 | Santhosh P Daniel | Common Stock | D | 2,000 | $7.54 | 17,879 | D | S |
| 13 Aug, 2025 | Santhosh P Daniel | - | - | 17,879 | D | |||
| 12 Aug, 2025 | Santhosh P Daniel | - | - | 19,879 | D | |||
| 12 Aug, 2025 | Santhosh P Daniel | Common Stock | D | 4,410 | $7.31 | 19,879 | D | S |
| 23 May, 2025 | Virginia Johnson | Common Stock | D | 6,129 | $6.39 | 44,450 | D | F |
| 23 May, 2025 | Virginia Johnson | - | - | 44,450 | D | |||
| 12 May, 2025 | Donald R Young | - | - | 550,856 | D | |||
| 12 May, 2025 | Donald R Young | Common Stock | A | 20,000 | $5.35 | 550,856 | D | P |
| 30 Apr, 2025 | James E Sweetnam | Common Stock | A | 10,370 | $0.00 | 25,951 | D | A |
| 30 Apr, 2025 | William P Noglows | Common Stock | A | 10,370 | $0.00 | 88,987 | D | A |
| 30 Apr, 2025 | Steven R Mitchell | - | - | 146,528 | D | |||
| 30 Apr, 2025 | Steven R Mitchell | Common Stock | A | 10,370 | $0.00 | 146,528 | D | A |
| 30 Apr, 2025 | Kathleen Kool | Common Stock | A | 10,370 | $0.00 | 23,953 | D | A |