Hyperion Defi HYPD Insider Ownership

NASDAQ HYPD

$2.97 +0.12 (+4.02%)

As of: Oct 20, 2026 · 3:02 PM EDT

Insider Holdings by Owner

2.64Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

15.79%

▼-1.28% pp QoQ

Shares Held by Insiders

2.42Mn

filed for Sep 2026

▼-7.50% QoQ

Shares Outstanding

15.30Mn

15,299,832 shares

Direct Holdings

2.37Mn

Indirect: 42.53K

Net Shares Traded (QoQ)

-195.99K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Across the past 12 months, open-market trades by Hyperion Defi insiders were all purchases, totaling $641,038 (197.2K shares).

By number of insiders, Hyperion Defi saw 5 insiders buy on the open market over the past 12 months and none sell.
Among Hyperion Defi insiders, Ellen R. Strahlman (Director) led open-market buying over the past 12 months with $233,755 of purchases (69.32K shares); the latest was on December 29, 2025.
Hyunsu Jung (Director and officer) made the most recent open-market trade by an insider of Hyperion Defi, a purchase of 1K shares for $3,660 on June 2, 2026.
Beyond open-market trades, insiders at Hyperion Defi received 133.92K shares in stock awards and gave up 202.72K shares to cover taxes or exercise prices in the last 12 months.
Business Quant data puts insider holdings in HYPD at 2.42Mn shares across insiders' latest Form 4 filings, down 7.50% from 2.61Mn shares at the end of Q2 2026 and up 7.50% from 2.25Mn shares at the end of Q3 2025.
By type of ownership, HYPD insiders hold 98.24% of their shares directly (2.37Mn shares) and 1.76% indirectly (42.53K shares).
Per Business Quant, 12 insiders of HYPD hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
HYPD's largest insider holders by reported holdings are Hyunsu Jung (Director and officer, 1.35Mn shares), David R. Knox (Chief Financial Officer, 287.56K shares) and Ellen R. Strahlman (Director, 184.95K shares).
The largest insider, Hyunsu Jung, holds 55.70% of HYPD's insider total.
Institutions held 16.71% of Hyperion Defi's outstanding shares in their Q2 2026 13F filings, insiders about 15.79% based on their latest Form 4 filings, and other investors, including the public, the remaining 67.50%.
Over the trailing 12 months, 7 insiders reported transactions in HYPD stock across 16 Form 4 filings.
The insider data for HYPD reflects Form 4 filings through September 30, 2026.

Form 4 Holdings

Insiders Holding HYPD

Insiders 17

Shares held 2.64Mn

Of outstanding 17.23%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Hyunsu Jung	Chief Investment Officer	1,345,676	1,345,676	51.0%	18 Aug, 2026
2	David R. Knox	Chief Financial Officer	287,556	287,556	10.9%	30 Sep, 2026
3	Michael S Geltzeiler	Director	204,947	204,947	7.8%	01 Jul, 2026
4	Stuart M. Grant	TenPercentOwner	202,302	202,302	7.7%	03 Jul, 2024
5	Happy David Walters	Director	170,847	170,847	6.5%	01 Jul, 2026
6	Ellen R Strahlman	Director	150,078	150,078	5.7%	01 Jul, 2026
7	Rachel Jacobson	Director	115,218	115,218	4.4%	01 Jul, 2026
8	Robert Rubenstein	General Counsel	75,000	75,000	2.8%	12 Jan, 2026
9	Bren Kern	Chief Operating Officer	50,062	50,062	1.9%	23 Apr, 2025
10	Tsontcho Ianchulev	Chief Executive Officer	10,122	10,122	0.4%	29 Apr, 2025
11	Charles E Iv Mather	Director	9,950	9,950	0.4%	29 Apr, 2025
12	Michael M Rowe	Chief Executive Officer	8,387	8,387	0.3%	09 Jul, 2025
13	Ram Palanki	Director	4,487	4,487	0.2%	29 Apr, 2025
14	Kenneth B Jr Lee	Director	807	807	0.0%	21 Jun, 2022
15	Julia A Haller	Director	380	380	0.0%	21 Jun, 2022
16	Stephen Keith Benjamin	Director	319	319	0.0%	21 Jun, 2022
17	John P Gandolfo	Chief Financial Officer	100	100	0.0%	31 May, 2023

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.

Form 4 Filings

317 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
29 Sep, 2026	David R. Knox	Chief Financial Officer	Disposed F	19,563	$0.00	$0	287,556	Direct
16 Aug, 2026	Hyunsu Jung	Director, Officer	Disposed F	40,000	$0.00	$0	1,345,676	Direct
30 Jun, 2026	Michael S Geltzeiler	Director	Acquired A	58,917	$0.00	$0	146,932	Direct
30 Jun, 2026	Rachel Jacobson	Director	Acquired A	58,917	$0.00	$0	115,218	Direct
30 Jun, 2026	Ellen R Strahlman	Director	Acquired A	58,917	$0.00	$0	150,078	Direct
30 Jun, 2026	Happy David Walters	Director	Acquired A	58,917	$0.00	$0	170,847	Direct
01 Jun, 2026	Hyunsu Jung	Director, Officer	Acquired P	5,000	$3.66	$18.30K	1,382,676	Direct
01 Jun, 2026	Hyunsu Jung	Director, Officer	Acquired P	2,000	$3.81	$7.62K	1,384,676	Direct
02 Jun, 2026	Hyunsu Jung	Director, Officer	Acquired P	500	$3.64	$1.82K	1,385,176	Direct
02 Jun, 2026	Hyunsu Jung	Director, Officer	Acquired P	500	$3.68	$1.84K	1,385,676	Direct
27 May, 2026	Hyunsu Jung	Director, Officer	Disposed F	40,000	$0.00	$0	1,377,676	Direct
30 Mar, 2026	David R. Knox	Chief Financial Officer	Disposed F	20,831	$0.00	$0	307,119	Direct
12 Jan, 2026	Robert Rubenstein	General Counsel	Acquired A	75,000	$0.00	$0	75,000	Direct
31 Dec, 2025	David R. Knox	Chief Financial Officer	Acquired P	27,950	$3.59	$100.34K	327,950	Direct
26 Dec, 2025	Ellen R Strahlman	Director	Acquired P	3,601	$3.86	$13.91K	79,049	Direct
29 Dec, 2025	Hyunsu Jung	Director, Officer	Disposed F	82,324	$0.00	$0	1,417,676	Direct
29 Dec, 2025	Ellen R Strahlman	Director	Acquired P	12,112	$3.60	$43.60K	91,161	Direct
26 Dec, 2025	Ellen R Strahlman	Director	Acquired P	3,311	$3.86	$12.78K	23,013	Indirect
29 Dec, 2025	Ellen R Strahlman	Director	Acquired P	11,856	$3.61	$42.80K	34,869	Indirect
18 Dec, 2025	Ellen R Strahlman	Director	Acquired P	18,742	$3.14	$58.83K	75,448	Direct

Showing 1 to 20 of 317 transactions