# EDGAR Filing Document

**Accession Number:** 0000933972
**File Stem:** 0001654954-25-010349
**Filing Date:** 2025-9
**Character Count:** 7360
**Document Hash:** 28234d2ebdb70f4386e5c5883444945c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001654954-25-010349.hdr.sgml**: 20250903

**ACCESSION NUMBER**: 0001654954-25-010349

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20240422

**FILED AS OF DATE**: 20250903

**DATE AS OF CHANGE**: 20250903

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Gannon Chris M
- **CENTRAL INDEX KEY:** 0001645284

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41420
- **FILM NUMBER:** 251287985

**MAIL ADDRESS:**
- **STREET 1:** 1717 DOOLITTLE DRIVE
- **CITY:** SAN LEANDRO
- **STATE:** CA
- **ZIP:** 94577
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** 374Water Inc.
- **CENTRAL INDEX KEY:** 0000933972
- **STANDARD INDUSTRIAL CLASSIFICATION:** MOTORS & GENERATORS [3621]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 880271109
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 701 W. MAIN STREET
- **STREET 2:** SUITE 410
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27701
- **BUSINESS PHONE:** 440-609-9677

**MAIL ADDRESS:**
- **STREET 1:** 3710 SHANNON RD #51877
- **STREET 2:** SUITE 410
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27717

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** POWERVERDE, INC.
- **DATE OF NAME CHANGE:** 20080820

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** VYREX CORP
- **DATE OF NAME CHANGE:** 19951206

### 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>Gannon Chris M<br><sub>(Last) (First) (Middle)</sub><br>C/O 374 WATER INC.<br>100 SOUTHCENTER COURT, SUITE 200<br><sub>(Street)</sub><br>MORRISVILLE, NC 27560<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2024-04-22 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Executive Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>374Water Inc. [ SCWO ] | **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 (restricted stock units) | 2024-04-22 |  | A |  | 1000000<sup>(1)</sup> | A | $0 | 1120000<sup>(2)</sup> | D |  |
| Common Stock (restricted stock units) | 2025-08-28 |  | A |  | 1250000<sup>(3)</sup> | A | $0 | 2370000 | 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 Units | $0 | 2024-04-22 |  | A |  | 1250000<sup>(1)</sup> |  | <sup>(4)</sup> | <sup>(4)</sup> | Common Stock, $0.0001 par value | 1250000 | $0 | 1250000<sup>(2)</sup> | D |  |

---

### Footnotes:

(1) The Restricted Stock Units (the "2024 RSUs") reported herein were granted to the Reporting Person on April 22, 2024, pursuant to his Employment Agreement (the "Employment Agreement"), dated as of April 19, 2024, and effective as of April 22, 2024 (the "Effective Date"). 250,000 of the shares subject to the 2024 RSUs vested on April 22, 2025, and the remaining 750,000 shares vest in equal increments on the last day of every month thereafter over the following 36 months, subject to the Reporting Person's continued employment with the Issuer on each vesting date. As of September 2, 2025, 333,333 shares subject to the 2024 RSUs were vested, and 666,667 shares are unvested.

(2) On May 1, 2024, the Reporting Person inadvertently filed a Form 3 that reported the RSUs. This filing serves to disclose the RSUs on a Form 4.

(3) The shares subject to the Restricted Stock Unit vest in equal increments on the last day of every month over 36 months, beginning on March 31, 2025, subject to the Reporting Person's continued employment with the Issuer on each vesting date.

(4) Under the Employment Agreement and subject to the terms of the Issuer's 2021 Equity Incentive Plan (the "Plan"), the Reporting Person was granted up 1,250,000 RSUs under the Plan, that vest pursuant to certain milestones set forth by the Issuer.

**Signature:** /s/ Chris M. Gannon  
**Date:** 2025-09-02

### 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.**