# EDGAR Filing Document

**Accession Number:** 0002026279
**File Stem:** 0001213900-25-064805
**Filing Date:** 2025-7
**Character Count:** 6903
**Document Hash:** 874cc04e74996063c86188f670ab1204
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-25-064805.hdr.sgml**: 20250716

**ACCESSION NUMBER**: 0001213900-25-064805

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250710

**FILED AS OF DATE**: 20250716

**DATE AS OF CHANGE**: 20250716

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Neuman John
- **CENTRAL INDEX KEY:** 0002026279

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39927
- **FILM NUMBER:** 251128568

**MAIL ADDRESS:**
- **STREET 1:** 5910 PARADISE LANE
- **CITY:** UNIONVILLE
- **STATE:** MI
- **ZIP:** 48767
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SeaStar Medical Holding Corp
- **CENTRAL INDEX KEY:** 0001831868
- **STANDARD INDUSTRIAL CLASSIFICATION:** SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 853681132
- **STATE OF INCORPORATION:** CO
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 3513 BRIGHTON BLVD
- **STREET 2:** SUITE 410
- **CITY:** DENVER
- **STATE:** CO
- **ZIP:** 80216
- **BUSINESS PHONE:** 844-427-8100

**MAIL ADDRESS:**
- **STREET 1:** 3513 BRIGHTON BLVD
- **STREET 2:** SUITE 410
- **CITY:** DENVER
- **STATE:** CO
- **ZIP:** 80216

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LMF Acquisition Opportunities Inc
- **DATE OF NAME CHANGE:** 20201109

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Neuman John<br><sub>(Last) (First) (Middle)</sub><br>C/O SEASTAR MEDICAL HOLDING CORPORATION<br>3513 BRIGHTON BLVD., SUITE 410<br><sub>(Street)</sub><br>DENVER, CO 80216<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-07-10 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>SeaStar Medical Holding Corp [ ICU ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock, par value $0.0001 per share<sup>(1)</sup> | 2025-06-04 |  | M |  | 2667<sup>(2)</sup> | A | $0 | 88000<sup>(3)</sup> | D |  |
| Common Stock, par value $0.0001 per share | 2025-07-10 |  | A |  | 4000<sup>(4)</sup> | A | $0 | 92000<sup>(3)</sup> | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Restricted Stock Unit | <sup>(5)</sup> | 2025-06-04 |  | M |  |  | 2667 | <sup>(6)</sup> | <sup>(6)</sup> | Common Stock, par value $0.0001 per share | 2667 | $0 | 0<sup>(7)</sup> | D |  |

---

### Footnotes:

(1) This Form 4 is being filed to report the granting and 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 5,333 shares underlying RSUs that were previously reported in Table II.

(4) Represents a RSU award. The RSUs will vest in full on July 3, 2026.

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

(6) As previously reported, on November 13, 2024, the reporting person was granted 8,000 RSUs, vesting in three approximately equal annual installments on the first, second and third anniversaries of June 4, 2024.

(7) The total does not include 5,333 shares underlying RSUs that are now reported in Table I.

**Signature:** /s/ David Green, as attorney-in-fact  
**Date:** 2025-07-16

### Remarks:

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.**