# EDGAR Filing Document

**Accession Number:** 0001680378
**File Stem:** 0000902664-26-000642
**Filing Date:** 2026-2
**Character Count:** 5738
**Document Hash:** 6b22123ad890f820ea2a0aa46fb50261
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000902664-26-000642.hdr.sgml**: 20260202

**ACCESSION NUMBER**: 0000902664-26-000642

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260129

**FILED AS OF DATE**: 20260202

**DATE AS OF CHANGE**: 20260202

**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:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37941
- **FILM NUMBER:** 26588997

**BUSINESS ADDRESS:**
- **STREET 1:** 430 CAMBRIDGE AVE STE 100
- **CITY:** PALO ALTO
- **STATE:** CA
- **ZIP:** 94306
- **BUSINESS PHONE:** 650-323-6400

**MAIL ADDRESS:**
- **STREET 1:** 430 CAMBRIDGE AVE STE 100
- **CITY:** PALO ALTO
- **STATE:** CA
- **ZIP:** 94306
**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 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **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. Issuer Name and Ticker or Trading Symbol**<br>SenesTech, Inc. [ SNES ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-01-29 | **4. 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>_ _ | **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 Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock, $0.001 par value per share ("Common Stock") | 545647 | I | See footnote<sup>(1)</sup> |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Series I Common Stock Warrants (right to buy) | 2025-08-13 | 2026-11-13 | Common Stock | 90000<sup>(2)</sup> | $5.25 | I | See footnote<sup>(1)</sup> |

---

### Footnotes:

(1) 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 his or its pecuniary interest therein, if any.

(2) Pursuant to the terms of the Series I Common Stock Warrants (the "Warrants"), the Reporting Person cannot exercise any of the Warrants to the extent the Reporting Person would beneficially own, after any such exercise, more than 4.99% of the outstanding Common Stock (the "4.99% Blocker") for the Warrants held by GCM EPSP, or 9.99% of the outstanding Common Stock (the "9.99% Blocker") for the Warrants held by PFS Trust. Consequently, at this time, the Reporting Person is not able to exercise the Warrants reported herein due to the 4.99% Blocker and the 9.99% Blocker.

**Signature:** Glenbrook Capital Management, By: /s/ John David Kessler, Director  
**Date:** 2026-02-02

### 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.**