Data spanning the past 90 days through February 19, 2026 reveals that Hyperion Defi's three principal insider shareholders consist of Director Hyunsu Jung (1.42Mn shares), Chief Financial Officer David R. Knox (327.95K shares), TenPercentOwner Stuart M. Grant (136.43K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Stuart M. Grant | 136,427 | 03 Jul, 2024 | |
| Hyunsu Jung | Nan | 1,417,676 | 30 Dec, 2025 |
| Fredric N Eshelman | 16,247 | 22 Nov, 2021 | |
| Ernest Mario | 4,784 | 22 Nov, 2021 | |
| David R. Knox | Chief Financial Officer | 327,950 | 05 Jan, 2026 |
| Ellen R Strahlman | 126,030 | 30 Dec, 2025 | |
| Happy David Walters | 111,930 | 19 Dec, 2025 | |
| Michael S Geltzeiler | 88,015 | 19 Dec, 2025 | |
| Robert Rubenstein | General Counsel | 75,000 | 12 Jan, 2026 |
| Jennifer G Clasby | Vp And Regulatory And Clinical | 832 | 21 Jul, 2021 |
| Kenneth B Jr Lee | 807 | 21 Jun, 2022 | |
| Rachel Jacobson | 56,301 | 20 Aug, 2025 | |
| Bren Kern | Chief Operating Officer | 50,031 | 23 Apr, 2025 |
| Curt H Labelle | 528 | 22 Nov, 2021 | |
| Julia A Haller | 380 | 21 Jun, 2022 | |
| Anthony Y Sun | 329 | 22 Nov, 2021 | |
| Stephen Keith Benjamin | 319 | 21 Jun, 2022 | |
| Tsontcho Ianchulev | 10,122 | 29 Apr, 2025 | |
| Charles E Iv Mather | 9,950 | 29 Apr, 2025 | |
| John P Gandolfo | Chief Financial Officer | 100 | 31 May, 2023 |
| Michael M Rowe | Chief Executive Officer | 7,975 | 09 Jul, 2025 |
| Ram Palanki | 4,235 | 29 Apr, 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 |
|---|---|---|---|---|---|---|---|---|
| 12 Jan, 2026 | Robert Rubenstein | Common Stock, par value $0.0001 | A | 75,000 | $0.00 | 75,000 | D | A |
| 31 Dec, 2025 | David R. Knox | Common Stock, par value $0.0001 | A | 27,950 | $3.59 | 327,950 | D | P |
| 31 Dec, 2025 | David R. Knox | - | - | 327,950 | D | |||
| 29 Dec, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 11,856 | $3.61 | 34,869 | I | P |
| 29 Dec, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 12,112 | $3.60 | 91,161 | D | P |
| 29 Dec, 2025 | Ellen R Strahlman | - | - | 34,869 | I | |||
| 29 Dec, 2025 | Ellen R Strahlman | - | - | 91,161 | D | |||
| 29 Dec, 2025 | Hyunsu Jung | - | - | 1,417,676 | D | |||
| 29 Dec, 2025 | Hyunsu Jung | Common Stock, par value $0.0001 | D | 82,324 | $0.00 | 1,417,676 | D | F |
| 26 Dec, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 3,311 | $3.86 | 23,013 | I | P |
| 26 Dec, 2025 | Ellen R Strahlman | - | - | 23,013 | I | |||
| 26 Dec, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 3,601 | $3.86 | 79,049 | D | P |
| 18 Dec, 2025 | Ellen R Strahlman | - | - | 75,448 | D | |||
| 18 Dec, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 19,702 | $3.14 | 95,150 | I | P |
| 18 Dec, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 18,742 | $3.14 | 75,448 | D | P |
| 18 Dec, 2025 | Ellen R Strahlman | - | - | 95,150 | I | |||
| 17 Dec, 2025 | Michael S Geltzeiler | Common Stock, par value $0.0001 | A | 30,000 | $3.01 | 88,015 | D | P |
| 17 Dec, 2025 | Happy David Walters | - | - | 111,930 | D | |||
| 17 Dec, 2025 | Happy David Walters | Common Stock, par value $0.0001 | A | 61,930 | $3.02 | 111,930 | D | P |
| 29 Sep, 2025 | David R. Knox | Common Stock, par value $0.0001 | A | 200,000 | $0.00 | 300,000 | D | A |