# EDGAR Filing Document

**Accession Number:** 0001273782
**File Stem:** 0000902664-26-001650
**Filing Date:** 2026-3
**Character Count:** 7204
**Document Hash:** f0e4562caba081b1e3e3242e50167ec9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000902664-26-001650.hdr.sgml**: 20260317

**ACCESSION NUMBER**: 0000902664-26-001650

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260313

**FILED AS OF DATE**: 20260317

**DATE AS OF CHANGE**: 20260317

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** GLENBROOK CAPITAL MANAGEMENT
- **CENTRAL INDEX KEY:** 0001273782

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** NV
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37941
- **FILM NUMBER:** 26764411

**BUSINESS ADDRESS:**
- **STREET 1:** 5396 AVENUE 18 1/2
- **CITY:** CHOWCHILLA
- **STATE:** CA
- **ZIP:** 93610
- **BUSINESS PHONE:** 650-441-9525

**MAIL ADDRESS:**
- **STREET 1:** 5396 AVENUE 18 1/2
- **CITY:** CHOWCHILLA
- **STATE:** CA
- **ZIP:** 93610
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SenesTech, Inc.
- **CENTRAL INDEX KEY:** 0001680378
- **STANDARD INDUSTRIAL CLASSIFICATION:** AGRICULTURE CHEMICALS [2870]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 202079805
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 777 W. PINNACLE PEAK ROAD
- **STREET 2:** SUITE B104
- **CITY:** PHOENIX
- **STATE:** AZ
- **ZIP:** 85027
- **BUSINESS PHONE:** (928) 779 - 4143

**MAIL ADDRESS:**
- **STREET 1:** PO BOX 3627
- **CITY:** FLAGSTAFF
- **STATE:** AZ
- **ZIP:** 86003

### 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>GLENBROOK CAPITAL MANAGEMENT<br><sub>(Last) (First) (Middle)</sub><br>5396 AVENUE 18 1/2<br><sub>(Street)</sub><br>CHOWCHILLA, CA 93610<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-03-13 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>SenesTech, Inc. [ SNES ] | **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, $0.001 par value per share ("Common Stock") | 2026-03-13 |  | P |  | 146249 | A | $1.9517 | 865850<sup>(1)</sup> | I | See footnote<sup>(2)</sup> |
| Common Stock | 2026-03-16 |  | P |  | 5060 | A | $1.8562 | 870910 | I | See footnote<sup>(2)</sup> |
| Common Stock | 2026-03-17 |  | P |  | 19725 | A | $1.7924 | 890635 | I | See footnote<sup>(2)</sup> |

---

## 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 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) The amount of securities beneficially owned by the Reporting Person following the transaction that occurred on February 17, 2026, as reported in column 5 of Table I of the Form 4 filed by the Reporting Person on February 19, 2026, was understated by 15,390 shares of Common Stock. This understatment affected the amount of securities beneficially owned by the Reporting Person as reported in column 5 of Table I in all subsequent transactions reported on that Form 4. The amount of securities beneficially owned by the Reporting Person following the transaction reported on this line corrects this understatement.

(2) The securities to which this filing relates are held directly by PFS Trust ("PFS Trust") and Glenbrook Capital Management Inc. Employee Profit-Sharing Plan ("GCM EPSP"). Glenbrook Capital Management (the "Reporting Person") serves as the investment manager to each of PFS Trust and GCM EPSP. The Reporting Person disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities and Exchange Act of 1934, as amended, except to the extent of its pecuniary interest therein, if any.

**Signature:** Glenbrook Capital Management, By: /s/ John David Kessler, Director  
**Date:** 2026-03-17

### 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.**