Hyperion Defi, Inc. (HYPD) Insider Ownership

Historic Insider Ownership Trends

Hyperion Defi's three largest insider shareholders as of April 17, 2026 are Stuart M. Grant (TenPercentOwner, 10.91Mn shares), Stuart M. Grant (TenPercentOwner, 5.27Mn shares), Stuart M. Grant (TenPercentOwner, 4.52Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Stuart M. Grant - 10,914,153 0 03 Jul, 2024
Stuart M. Grant - 5,269,998 0 17 Aug, 2023
Stuart M. Grant - 4,523,589 0 27 Oct, 2021
Stuart M. Grant - 4,389,783 0 23 Aug, 2021
Hyunsu Jung Chief Investment Officer 1,417,676 0 30 Dec, 2025
Fredric N Eshelman - 1,299,750 0 22 Nov, 2021
Ernest Mario - 382,706 0 22 Nov, 2021
David R. Knox Chief Financial Officer 307,119 0 01 Apr, 2026
Ellen R Strahlman - 91,161 34,869 30 Dec, 2025
Happy David Walters - 111,930 0 19 Dec, 2025
Michael S Geltzeiler - 88,015 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
Michael S Geltzeiler - 58,015 0 20 Aug, 2025
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
Michael M Rowe Chief Executive Officer 32,927 0 05 Dec, 2023
Julia A Haller - 30,408 0 21 Jun, 2022
Anthony Y Sun - 26,322 0 22 Nov, 2021
Stephen Keith Benjamin - 25,511 0 21 Jun, 2022
Ram Palanki - 20,187 0 12 Jul, 2022
Tsontcho Ianchulev Chief Executive Officer 10,122 0 29 Apr, 2025
Michael M Rowe Chief Executive Officer 7,975 0 09 Jul, 2025
Ram Palanki - 4,235 0 29 Apr, 2025
Bren Kern Chief Operating Officer 2,500 0 31 May, 2023

* 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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
30 Mar, 2026 David R. Knox Common Stock, par value $0.0001 D 20,831 $0.00 307,119 D F
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
26 Dec, 2025 Ellen R Strahlman Common Stock, par value $.0001 A 3,601 $3.86 79,049 D P
29 Dec, 2025 Hyunsu Jung Common Stock, par value $0.0001 D 82,324 $0.00 1,417,676 D F
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
17 Dec, 2025 Michael S Geltzeiler Common Stock, par value $0.0001 A 30,000 $3.01 88,015 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 Michael S Geltzeiler Common Stock, par value $.0001 A 50,000 $0.00 58,015 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
18 Aug, 2025 Hyunsu Jung Common Stock, par value $0.0001 A 1,000,000 $0.00 1,500,000 D A
13 Jun, 2025 Michael S Geltzeiler Common Stock, par value $.0001 A 7,000 $0.00 8,015 D A