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Hyperion DeFi (HYPD) insider holds 1.35M shares after 40K withheld for taxes

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

HYPERION DEFI, INC. (HYPD) reported that officer and director Jung Hyunsu had 40,000 shares of common stock withheld on 2026-08-16 to satisfy tax withholding obligations arising from the vesting and settlement of previously granted restricted stock units. Following this tax-withholding disposition, Jung Hyunsu directly holds 1,345,676 shares of HYPD common stock.

Positive

  • None.

Negative

  • None.
Insider Jung Hyunsu
Role See Remarks
Type Security Shares Price Value
Tax Withholding Common Stock, par value $0.0001 F1 40,000 $0.00 $0.00
Holdings After Transaction: Common Stock, par value $0.0001 — 1,345,676 shares (Direct)
Footnotes (1)
  1. F1. These shares were withheld to satisfy tax withholding obligations incurred upon the vesting and settlement of a portion of a previously reported grant of restricted stock units held by the Reporting Person.
Shares withheld for taxes 40,000 shares Shares withheld on 2026-08-16 to satisfy tax withholding obligations on RSU vesting
Shares owned after transaction 1,345,676 shares Direct holdings of Jung Hyunsu following the 2026-08-16 tax-withholding disposition
Par value per share $0.0001 Par value of HYPERION DEFI, INC. common stock reported in the Form 4
Tax-withholding transactions count 1 Number of code F transactions reported in this Form 4
restricted stock units financial
"upon the vesting and settlement of a portion of a previously reported grant of restricted stock units"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
tax withholding obligations financial
"shares were withheld to satisfy tax withholding obligations incurred upon the vesting"
Common Stock, par value $0.0001 financial
"security_title: Common Stock, par value $0.0001"
Payment of tax liability by delivering or withholding securities financial
"transaction_code_description: Payment of tax liability by delivering or withholding securities"

FAQ

What transaction did HYPD insider Jung Hyunsu report on this Form 4?
Jung Hyunsu reported 40,000 HYPD common shares disposed on 2026-08-16. The shares were withheld by the company to cover tax withholding obligations from vesting restricted stock units, not an open-market sale.

Did Jung Hyunsu sell HYPD stock in the open market?
No. The Form 4 states the 40,000 shares were withheld to satisfy tax withholding obligations on RSU vesting, coded as a tax-related disposition (Code F), rather than a voluntary open-market sale of shares.

How many HYPD shares does Jung Hyunsu own after this transaction?
After the tax-withholding disposition, Jung Hyunsu directly owns 1,345,676 shares of HYPD common stock. This figure reflects holdings immediately following the 40,000-share withholding tied to the RSU vesting event.

What does transaction code F mean on the HYPD Form 4 filing?
Transaction code F indicates shares were delivered or withheld to pay exercise price or tax liability. Here, a footnote clarifies the 40,000 HYPD shares were withheld specifically to cover tax obligations from RSU vesting.

Is the HYPD Form 4 transaction under a Rule 10b5-1 trading plan?
No. The filing’s Rule 10b5-1 checkbox is marked false, and there is no footnote indicating a pre-arranged trading plan. The event reflects tax withholding upon RSU vesting, not plan-based trading.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Jung Hyunsu
(Last)(First)(Middle)
C/O HYPERION DEFI, INC.
3090 NOWITZKI WAY, SUITE 300
(Street)
DALLAS TEXAS 75219
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
HYPERION DEFI, INC. [ HYPD ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
See Remarks
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/16/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock, par value $0.000108/16/2026F40,000D$01,345,676(1)D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. These shares were withheld to satisfy tax withholding obligations incurred upon the vesting and settlement of a portion of a previously reported grant of restricted stock units held by the Reporting Person.
Remarks:
Chief Executive Officer and Chief Investment Officer
/s/ Hyunsu Jung08/18/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR