As of March 23, 2026, Hyperion Defi's top three insider holders are Stuart M. Grant (TenPercentOwner, 10.91Mn shares), Hyunsu Jung (See Remarks, 1.42Mn shares), Ernest Mario (Director, 382.71K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Stuart M. Grant | 10,914,153 | 0 | 03 Jul, 2024 | |
| Hyunsu Jung | See Remarks | 1,417,676 | 0 | 30 Dec, 2025 |
| Ernest Mario | 382,706 | 0 | 22 Nov, 2021 | |
| David R. Knox | Chief Financial Officer | 327,950 | 0 | 05 Jan, 2026 |
| Ellen R Strahlman | 91,161 | 34,869 | 30 Dec, 2025 | |
| Happy David Walters | 111,930 | 0 | 19 Dec, 2025 | |
| Robert Rubenstein | General Counsel | 75,000 | 0 | 12 Jan, 2026 |
| Jennifer G Clasby | Vp, Regulatory And Clinical | 66,537 | 0 | 20 Jul, 2021 |
| Kenneth B Jr Lee | 64,544 | 0 | 21 Jun, 2022 | |
| Rachel Jacobson | 56,301 | 0 | 20 Aug, 2025 | |
| Bren Kern | Chief Operating Officer | 50,031 | 0 | 23 Apr, 2025 |
| Curt H Labelle | 42,236 | 0 | 22 Nov, 2021 | |
| Julia A Haller | 30,408 | 0 | 21 Jun, 2022 | |
| Anthony Y Sun | 26,322 | 0 | 22 Nov, 2021 | |
| Tsontcho Ianchulev | 10,122 | 0 | 29 Apr, 2025 | |
| Charles E Iv Mather | 9,950 | 0 | 29 Apr, 2025 | |
| John P Gandolfo | Chief Financial Officer | 8,000 | 0 | 31 May, 2023 |
| Michael M Rowe | Chief Executive Officer | 7,975 | 0 | 09 Jul, 2025 |
| Michael S Geltzeiler | 6,015 | 0 | 29 Apr, 2025 | |
| Ram Palanki | 4,235 | 0 | 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 |
| 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 | 3,601 | $3.86 | 79,049 | D | P |
| 29 Dec, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 12,112 | $3.60 | 91,161 | D | P |
| 26 Dec, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 3,311 | $3.86 | 23,013 | I | P |
| 29 Dec, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 11,856 | $3.61 | 34,869 | 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 | Common Stock, par value $.0001 | A | 19,702 | $3.14 | 95,150 | I | P |
| 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 | 100,000 | $0.00 | 100,000 | D | A |
| 29 Sep, 2025 | David R. Knox | Common Stock, par value $0.0001 | A | 200,000 | $0.00 | 300,000 | D | A |
| 08 Sep, 2025 | Happy David Walters | Common Stock, par value $0.0001 | A | 50,000 | $0.00 | 50,000 | D | A |
| 18 Aug, 2025 | Hyunsu Jung | Common Stock, par value $0.0001 | A | 1,000,000 | $0.00 | 1,500,000 | D | A |
| 18 Aug, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 50,000 | $0.00 | 56,706 | D | A |
| 18 Aug, 2025 | Rachel Jacobson | Common Stock, par value $.0001 | A | 50,000 | $0.00 | 56,301 | D | A |
| 17 Jun, 2025 | Hyunsu Jung | Common Stock, par value $0.0001 | A | 500,000 | $0.00 | 500,000 | D | A |
| 13 Jun, 2025 | Ellen R Strahlman | Common Stock, par value $.0001 | A | 5,000 | $0.00 | 6,706 | D | A |
| 13 Jun, 2025 | Michael M Rowe | Common Stock, par value $0.0001 | A | 6,600 | $0.00 | 7,975 | D | A |
| 13 Jun, 2025 | Rachel Jacobson | Common Stock, par value $.0001 | A | 5,000 | $0.00 | 6,301 | D | A |