# EDGAR Filing Document

**Accession Number:** 0000933972
**File Stem:** 0001654954-26-002205
**Filing Date:** 2026-3
**Character Count:** 33161
**Document Hash:** 2bb662e8bb93816a78173e791940c30b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001654954-26-002205.hdr.sgml**: 20260312

**ACCESSION NUMBER**: 0001654954-26-002205

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260312

**DATE AS OF CHANGE**: 20260312

**SUBJECT COMPANY**: 

**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

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-49830
- **FILM NUMBER:** 26749047

**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
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** McKnight Stephen H.
- **CENTRAL INDEX KEY:** 0002114378

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**MAIL ADDRESS:**
- **STREET 1:** 100 SOUTHCENTER COURT
- **STREET 2:** SUITE 2000
- **CITY:** MORRISVILLE
- **STATE:** NC
- **ZIP:** 27560

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 3)**

**374Water Inc.**

*(Name of Issuer)*

**Common Stock, $0.001 par value per share**

*(Title of Class of Securities)*

**88583P203**

*(CUSIP Number)*

**Robert B. Macaulay**<br>Carlton Fields, P.A.<br>700 NW 1st Avenue<br>Miami FL 3313<br>(305) 530-0050

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**01/22/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Richard H. Davis** | Name of reporting person<br>**Richard H. Davis** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**390379.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**17053.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**390379.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**17053.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**407432.00** | Aggregate amount beneficially owned by each reporting person<br>**407432.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**2.4%** | Percent of class represented by amount in Row (11)<br>**2.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** _________________
 (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.
 (2)  For rows 7 and 9, shares reported consist of 114,379 shares of common stock, 6,000 shares issuable upon the exercise outstanding warrants exercisable within 60 days, and options to purchase 270,000 shares of common stock that are either exercisable or will become exercisable within 60 days.
 (3)  For rows 8 and 10, shares reported consist of 16,053 shares held by the reporting person's spouse and 1,000 shares held by Darby Shore Management Inc., a Florida corporation of which the reporting person is an officer, director, and 25% shareholder and may be deemed to have voting and investment power over the shares held by such corporation.

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Stephen H. McKnight** | Name of reporting person<br>**Stephen H. McKnight** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**196000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**7500.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**196000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**7500.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**203500.00** | Aggregate amount beneficially owned by each reporting person<br>**203500.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**1.2%** | Percent of class represented by amount in Row (11)<br>**1.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** _________________
 (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.
 (2) Shares beneficially owned include (i) 12,000 shares issuable upon the exercise of warrants exercisable within 60 days; (ii) 1,500 shares held by the Stephen H. McKnight Revocable Trust, of which the reporting person is the sole trustee; and (iii) 7,500 shares held by the reporting person's adult daughter and over which the reporting person has shared voting and dispositive power. The shares references in clause (iii) had been omitted from prior filings inadvertently.

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Robert F. Ehrman Declaration of Trust as Amended and Restated on 10/6/2022** | Name of reporting person<br>**Robert F. Ehrman Declaration of Trust as Amended and Restated on 10/6/2022** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**FLORIDA** | Citizenship or place of organization<br>**FLORIDA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**70867.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**70867.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**70867.00** | Aggregate amount beneficially owned by each reporting person<br>**70867.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.4%** | Percent of class represented by amount in Row (11)<br>**0.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** _________________
 (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**William R. Greenfield** | Name of reporting person<br>**William R. Greenfield** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**15000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**28834.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**15000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**28834.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**43834.00** | Aggregate amount beneficially owned by each reporting person<br>**43834.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.3%** | Percent of class represented by amount in Row (11)<br>**0.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** _________________
 (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.
 (2)  The 28,834 shares are held by the Greenfield Irrevocable Family Trust, of which Mr. Greenfield's wife, Margaret Greenfield, is the sole trustee and beneficiary.

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Bryce Allan Johnson** | Name of reporting person<br>**Bryce Allan Johnson** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**410086.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**410086.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**410086.00** | Aggregate amount beneficially owned by each reporting person<br>**410086.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**2.4%** | Percent of class represented by amount in Row (11)<br>**2.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** _________________
 (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Ligi Investments LLLP** | Name of reporting person<br>**Ligi Investments LLLP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**FLORIDA** | Citizenship or place of organization<br>**FLORIDA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**48000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**48000.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**48000.00** | Aggregate amount beneficially owned by each reporting person<br>**48000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.3%** | Percent of class represented by amount in Row (11)<br>**0.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** _________________
 (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.
 (2)  Jennifer P. Ligeti is the Manager of General Partner of Ligi Investments LLLP and has voting and investment power over the shares owned thereby.

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Kevin J. Lockwood** | Name of reporting person<br>**Kevin J. Lockwood** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**101000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**101000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**101000.00** | Aggregate amount beneficially owned by each reporting person<br>**101000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.6%** | Percent of class represented by amount in Row (11)<br>**0.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** _________________
 (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**John McClure** | Name of reporting person<br>**John McClure** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**41000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**41000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**41000.00** | Aggregate amount beneficially owned by each reporting person<br>**41000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.2%** | Percent of class represented by amount in Row (11)<br>**0.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** _________________
 (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.
 (2) Shares beneficially owned include 6,500 shares held by the Georgia Marie McClure Revocable Trust dated 12/20/1996, of which the reporting person is the sole trustee.

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Stephen H. McKnight Jr.** | Name of reporting person<br>**Stephen H. McKnight Jr.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**86043.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**86043.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**86043.00** | Aggregate amount beneficially owned by each reporting person<br>**86043.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.5%** | Percent of class represented by amount in Row (11)<br>**0.5%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.

| **CUSIP No.** | **88583P203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Christopher L. Tucker** | Name of reporting person<br>**Christopher L. Tucker** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**17964.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**17964.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**17964.00** | Aggregate amount beneficially owned by each reporting person<br>**17964.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.1%** | Percent of class represented by amount in Row (11)<br>**0.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** (1)  The percentage is based on 16,924,880 shares of the Issuer's common stock outstanding as of October 24, 2025, as reported in the Issuer's definitive proxy statement on Schedule 14A filed on November 3, 2025, after giving effect to the Issuer's 1-for-10 reverse stock split that took effect on December 26, 2025.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, $0.001 par value per share

**(b) Name of Issuer:**
374Water Inc.

**(c) Address of Issuer's Principal Executive Offices:**
100 Southcenter Court, Suite 200, Morrisville, NC, 27560

Explanatory Note
 
 This Amendment No. 3 to the statement on beneficial ownership on Schedule 13D (this "Amendment No. 3") amends and supplements the information set forth in the Statement on Schedule 13D filed by the Reporting Persons with the SEC on December 12, 2025 (the "Original Schedule 13D"), as amended by Amendment No. 1 thereto filed on December 16, 2026 and Amendment No. 2 thereto filed on January 5, 2026 (as amended, the "Schedule 13D"). This Amendment No. 3 is being filed to reflect (i) the departure of Yaacov (Kobe) Nagar from the "group," as that term is used in Section 13(d)  of the Exchange Act and the rules thereunder, on January 22, 2026 as reported in the amendment to Mr. Nagar's Schedule 13D filed on January 26, 2026, and (ii) dissolution of the "group," as that term is used in Section 13(d)  of the Exchange Act and the rules thereunder, among the Reporting Persons on February 8, 2026. All capitalized terms contained herein but not otherwise defined shall have the meanings ascribed to such terms in the Original Schedule 13D. Except as specifically provided herein, this Amendment No. 3 does not modify any of the information previously reported in the Original Schedule 13D. This Amendment No. 3 constitutes an "exit filing" for each of the Reporting Persons except for Mr. Nagar, who has filed an amendment to his own Schedule 13D on January 26, 2026. This Amendment No. 3 is being filed late due to delays encountered with the enrollment and account authorization within the SEC's EDGAR Next System.

**Item 4. Purpose of Transaction**

Item 4 of the Schedule 13D is hereby amended and supplemented as follows: 
 
 As disclosed in Amendment No. 2 to the Schedule 13D filed by Yaacov (Kobe) Nagar on January 23, 2026, Mr. Nagar was no longer a member of the group as of January 22, 2026.
 
 On February 8, 2026, the Issuer appointed Mr. McKnight to the Board, effective February 9, 2026, to fill the vacancy created by the resignation of James Vanderhider from the Board. Mr. Vanderhider's resignation and Mr. McKnight's appointment were made in accordance with the Agreement between Mr. Nagar and the Issuer. Mr. McKnight is the third candidate that was mutually acceptable to both the Issuer and Mr. Nagar pursuant to the terms of the Agreement. Accordingly, the Reporting Persons have each determined independently that they are no longer deemed to be acting as a "group," as that term is used in Section 13(d)  of the Exchange Act and the rules thereunder.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5 of the Schedule 13D is amended and restated as follows:
  
  (a) As a result of the developments between the Reporting Persons and the Issuer, as discussed under Item 4, the Reporting Persons are no longer deemed to be a "group," as that term is used in Section 13(d) of the Exchange Act and the rules thereunder.

**(b)**
—

**(c)**
—

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Richard H. Davis

**Signature:** /s/ Richard H. Davis

**Name/Title:** Richard H. Davis

**Date:** 03/05/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Stephen H. McKnight

**Signature:** /s/ Stephen H. McKnight

**Name/Title:** Stephen H. McKnight

**Date:** 03/05/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Robert F. Ehrman Declaration of Trust as Amended and Restated on 10/6/2022

**Signature:** /s/ Marlys A. Ehrman

**Name/Title:** Marlys A. Ehrman, Trustee

**Date:** 03/11/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** William R. Greenfield

**Signature:** /s/ William R. Greenfield

**Name/Title:** William R. Greenfield

**Date:** 03/09/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Bryce Allan Johnson

**Signature:** /s/ Bryce Allan Johnson

**Name/Title:** Bryce Allan Johnson

**Date:** 03/11/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Ligi Investments LLLP

**Signature:** /s/ Jennifer Ligeti

**Name/Title:** Jennifer Ligeti, Manager

**Date:** 03/09/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Kevin J. Lockwood

**Signature:** /s/ Kevin J. Lockwood

**Name/Title:** Kevin J. Lockwood

**Date:** 03/05/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** John McClure

**Signature:** /s/ John McClure

**Name/Title:** John McClure

**Date:** 03/09/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Stephen H. McKnight Jr.

**Signature:** /s/ Stephen H. McKnight Jr.

**Name/Title:** Stephen H. McKnight Jr.

**Date:** 03/11/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Christopher L. Tucker

**Signature:** /s/ Christopher L. Tucker

**Name/Title:** Christopher L. Tucker

**Date:** 03/06/2026