[Form 4] SeaStar Medical Holding Corporation Insider Trading Activity

Rhea-AI Filing Summary

SeaStar Medical insider purchase: Chief Medical Officer Kevin Chung purchased 10,000 shares of SeaStar Medical Holding Corp (ICU) on 08/22/2025 at a reported price of $0.80 per share, increasing his beneficial ownership to 58,184 shares. The Form 4 was signed by an attorney-in-fact on 08/25/2025. No derivative transactions or additional remarks were reported.

Positive

• Insider purchase disclosed: 10,000 shares acquired, demonstrating compliance with Section 16 reporting
• Ownership increased: Beneficial ownership rose to 58,184 shares following the transaction

Negative

• None.

Insights

Securities Analyst

TL;DR: A routine insider purchase of 10,000 shares at $0.80; modest ownership increase, likely immaterial to valuation.

The Form 4 shows a single open-market purchase by the Chief Medical Officer on 08/22/2025 for 10,000 shares at $0.80 each, raising his total to 58,184 shares. There are no derivative transactions, additions of new disclosure items, or other unusual items. For most investors this is a neutral, routine insider buy signal without material impact on company capitalization.

Corporate Governance Expert

TL;DR: Properly filed Form 4 documenting an insider purchase; filing appears complete and timely.

The document identifies the reporting person, role (Chief Medical Officer), transaction date, quantity purchased, and post-transaction beneficial ownership. The signature is executed by an attorney-in-fact on 08/25/2025. There are no amendments or explanatory remarks. From a governance perspective, disclosures meet Section 16 requirements based on the information provided.

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

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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^*

Chung Kevin

(Last) (First) (Middle)

C/O SEASTAR MEDICAL HOLDING CORPORATION

3513 BRIGHTON BLVD., SUITE 410

(Street)

DENVER CO 80216

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
SeaStar Medical Holding Corp [ ICU ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Medical Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/22/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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 per share	08/22/2025		P		10,000	A	$0.8	58,184	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:

Remarks:

	/s/ Eric Schlorff, as attorney-in-fact	08/25/2025
	** 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.

FAQ

What insider transaction did SeaStar Medical (ICU) report on this Form 4?

The Form 4 reports that Chief Medical Officer Kevin Chung purchased 10,000 shares on 08/22/2025 at a reported price of $0.80 per share.

How many shares does Kevin Chung beneficially own after the transaction?

After the reported purchase, Kevin Chung beneficially owns 58,184 shares of SeaStar Medical Holding Corp.

Were any derivative securities reported in this filing for ICU?

No. The Form 4 contains no entries in Table II; no derivative securities were reported.

When was the Form 4 signed and by whom?

The Form 4 bears a signature executed by Eric Schlorff, as attorney-in-fact on 08/25/2025.

Does the filing indicate any amendments or additional remarks?

No amendment date is provided and the remarks section contains no substantive entries; no amendments or additional remarks are reported.