Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * GLENBROOK CAPITAL MANAGEMENT 2. Issuer Name and Ticker or Trading Symbol SenesTech, Inc. [SNES] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2207, SUITE B, BELLANCA ST. 3. Date of Earliest Transaction (Month/Day/Year) 10/28/2026 (Street) MINDEN, NV 89423 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, par value $0.001 per share 10/28/2026 P 28,000 A $0.9651(1) 2,194,973 I See footnote(2) Common Stock 10/30/2026 P 2,000 A $1.0167(3) 2,196,973 I See footnote(2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Series I Common Stock Warrants (right to buy)

$5.25

08/13/2025

11/22/2026(6)

Common Stock

90,000

90,000(4)(5)

I

I - By PFS Trust(2)

Series I Common Stock Warrants (right to buy)

$5.25

08/13/2025

11/22/2026(6)

Common Stock

90,000

90,000(4)(5)

I

I - By PFS Trust(2)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
GLENBROOK CAPITAL MANAGEMENT 2207, SUITE B, BELLANCA ST. MINDEN, NV 89423		X

Signatures

/s/ Robert W. Lishman		10/30/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $0.8299 to $1.00, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.
(2)	The securities to which this filing relates are held directly by certain accounts for which Glenbrook Capital Management serves as investment manager. The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.
(3)	The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $0.9870 to $1.0900, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.
(4)	The Reporting Person's Form 3 filed on February 2, 2026 reported Series I Common Stock Warrants exercisable for 90,000 shares of Common Stock. As of that date, and as of the date of this report, the Reporting Person's indirect holdings of Series I Common Stock Warrants were exercisable for an aggregate of 180,000 shares of Common Stock, consisting of 90,000 shares held by PFS Trust and 90,000 shares held by the Glenbrook Capital Management Inc. Employees Profit-Sharing Plan ("GCM EPSP"). This report reflects the Reporting Person's holdings of Series I Common Stock Warrants as corrected. The Form 3 also reported an expiration date of November 13, 2026; the correct expiration date is set forth in footnote (6). There has been no transaction in the Series I Common Stock Warrants since the filing of the Form 3.
(5)	Pursuant to the terms of the Series I Common Stock 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 for the warrants held by GCM EPSP, or 9.99% of the outstanding Common Stock for the warrants held by PFS Trust. Consequently, the Reporting Person is not currently able to exercise the warrants reported herein.
(6)	The Series I Common Stock Warrants expire on the fifteen-month anniversary of the effective date of the Issuer's resale registration statement on Form S-3 (File No. 333-289650), which became effective on August 22, 2025. Because November 22, 2026 is not a Trading Day, under the terms of the warrants they may be exercised until 5:00 p.m. (New York City time) on the next succeeding Trading Day, November 23, 2026.

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