HYPERION DEFI (HYPD) director reports 40,000-share tax withholding on RSU vesting

Rhea-AI Filing Summary

HYPERION DEFI, INC. director and officer Jung Hyunsu reported a routine tax-related share disposition. On May 27, 2026, 40,000 shares of common stock were withheld to cover tax obligations from the vesting and settlement of a previously granted restricted stock unit award. There was no open-market sale, and Hyunsu’s direct holdings after this withholding were 1,377,676 common shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Jung Hyunsu

Role See Remarks

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock, par value $0.0001	40,000	$0.00	--

Holdings After Transaction: Common Stock, par value $0.0001 — 1,377,676 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares withheld for taxes: 40,000 shares Shares held after transaction: 1,377,676 shares Transaction code: F

3 metrics

Shares withheld for taxes 40,000 shares Tax withholding on RSU vesting, May 27, 2026

Shares held after transaction 1,377,676 shares Direct common stock holdings after withholding

Transaction code F Payment of tax liability by delivering securities

Key Terms

restricted stock units, tax withholding obligations, Form 4

3 terms

restricted stock units financial

"previously reported grant of restricted stock units held by the Reporting Person"

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"

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED 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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/27/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.0001	05/27/2026		F		40,000(1)	D	$0	1,377,676	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount 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 Jung	05/27/2026
	** Signature of Reporting Person	Date
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)

FAQ

What insider transaction did HYPERION DEFI (HYPD) report for Jung Hyunsu?

HYPERION DEFI reported that director and officer Jung Hyunsu had 40,000 common shares withheld. The shares were used to satisfy tax obligations triggered by the vesting and settlement of a previously granted restricted stock unit award.

Was the HYPD Form 4 transaction an open-market sale of shares?

No, the HYPD Form 4 did not report an open-market sale. The 40,000 shares were withheld by the company to pay tax withholding obligations tied to restricted stock units, rather than sold on the open market to third-party buyers.

How many HYPERION DEFI (HYPD) shares were withheld for taxes in this Form 4?

The Form 4 shows that 40,000 shares of HYPERION DEFI common stock were withheld. These shares covered tax liabilities that arose when a portion of a restricted stock unit grant vested and settled for the reporting person, Jung Hyunsu.

How many HYPD shares does Jung Hyunsu hold after the tax withholding?

After the 40,000-share tax withholding, Jung Hyunsu directly holds 1,377,676 HYPERION DEFI common shares. This figure reflects his remaining ownership position reported in the Form 4 following the RSU-related withholding transaction.

What does transaction code "F" mean in the HYPERION DEFI (HYPD) Form 4?

Transaction code “F” indicates shares were disposed of to pay an exercise price or tax liability. For HYPERION DEFI, it reflects 40,000 shares withheld to satisfy tax obligations from the vesting and settlement of a restricted stock unit grant.