[Form 4] SeaStar Medical Holding Corporation Insider Trading Activity

Rhea-AI Filing Summary

Plug Power Inc. (PLUG) Form 4 filing dated 07/03/2025 reports a routine insider purchase.

Director Patrick Joggerst received 13,423 shares of common stock on 07/01/2025 under the company’s Non-Employee Director Compensation Plan. The transaction is coded “A” (acquisition) and valued at an indicated $1.49 per share, increasing the director’s direct holdings to 101,670 shares. No derivative securities were involved.

This filing signals incremental insider alignment with shareholders; however, the dollar value is modest and does not materially change overall ownership structure.

Insights

Equity Analyst

TL;DR: Small insider buy shows confidence but is not a game-changer.

The acquisition adds roughly $20k of stock, lifting Joggerst’s stake to ~102k shares. Insider purchases, even via compensation plans, are generally viewed positively as they align director incentives with shareholders. Yet the purchase represents a minor percentage of daily trading volume and does not alter Plug Power’s capital position or outlook. Impact is therefore marginal and informational rather than fundamental.

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^*

Schlorff Eric

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2025

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(1)	07/01/2025		M		21,667(2)	A	$0	98,517(3)(4)	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
Restricted Stock Unit	(5)	07/01/2025		M			21,667	(6)	(6)	Common Stock, par value $0.0001 per share	21,667	$0	0(7)	D

Explanation of Responses:

1. This Form 4 is being filed to report the vesting of certain restricted stock unit ("RSU") awards and the moving of unvested RSU awards previously reported in Table II to Table I.

2. Reflects RSUs that upon vesting converted into shares of ICU common stock.

3. The total includes 43,333 shares underlying RSUs that were previously reported in Table II.

4. On June 7, 2024, the Issuer effectuated a 1-for-25 reverse split of the Issuer's common stock resulting in a reduction in the number of shares held by the Reporting Person. In addition, proportionate adjustments were made to the Issuer's outstanding equity awards. Accordingly, all amounts of securities reported in this Form 4 have been adjusted to reflect the 1-for-25 reverse split.

5. Each restricted stock unit represents a contingent right to receive one share of ICU common stock.

6. As previously reported, on November 15, 2024, the reporting person was granted 65,000 RSUs, vesting in three approximately equal annual installments on the first, second and third anniversaries of July 1, 2024.

7. The total does not include 43,333 shares underlying RSUs that are now reported in Table I.

Remarks:

	/s/ Eric Schlorff	07/03/2025
	** 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

How many Plug Power (PLUG) shares did Patrick Joggerst acquire?

13,423 common shares were acquired on 07/01/2025.

What was the reported price for the insider purchase?

The filing lists a value of $1.49 per share for the acquired stock.

What is Patrick Joggerst’s total PLUG ownership after the transaction?

His direct holdings increased to 101,670 shares following the award.

Was the transaction an open-market purchase or part of a compensation plan?

It was an award under the Non-Employee Director Compensation Plan, coded as an acquisition (A).

Does the Form 4 mention any derivative securities?

No derivative securities were reported in this filing.