SenesTech major holder buys 35,000 shares

Glenbrook Capital Management, a ten percent owner of SenesTech, Inc., reported purchasing 35,000 shares of common stock on July 20, 2026 at an average price of $1.4734 per share in an open-market or private transaction.

Rhea-AI Filing Summary

Glenbrook Capital Management, a ten percent owner of SenesTech, Inc., reported purchasing 35,000 shares of common stock on July 20, 2026 at an average price of $1.4734 per share in an open-market or private transaction. Following this trade, an account it manages held 1,057,824 shares indirectly. Glenbrook states these securities are held for a managed account and it disclaims beneficial ownership except to the extent of its pecuniary interest. The transaction was not marked as being under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Buyer: 35,000 shares

Net Buy 1 txn

Insider GLENBROOK CAPITAL MANAGEMENT

Role 10% Owner

Bought 35,000 shs ($52K)

Type	Security	Shares	Price	Value
Purchase	Common Stock, $0.001 par value per share ("Common Stock") F1	35,000	$1.4734	$52K

Holdings After Transaction: Common Stock, $0.001 par value per share ("Common Stock") — 1,057,824 shares (Indirect, See footnote)

Footnotes (1)

1. F1. The securities to which this filing relates are held directly by a certain account for which Glenbrook Capital Management (the "Reporting Person") serves as the investment manager. 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.

Key Figures

Shares purchased: 35,000 shares Purchase price: $1.4734 per share Shares held after transaction: 1,057,824 shares

3 metrics

Shares purchased 35,000 shares Common stock bought on July 20, 2026

Purchase price $1.4734 per share Average price for the 35,000-share acquisition

Shares held after transaction 1,057,824 shares Indirect holdings in a managed account following the purchase

Key Terms

ten percent owner, indirect ownership, beneficial ownership, pecuniary interest, +2 more

6 terms

ten percent owner regulatory

"Glenbrook Capital Management is identified as a ten percent owner"

indirect ownership regulatory

"the account it manages held 1,057,824 shares indirectly"

beneficial ownership regulatory

"The Reporting Person disclaims beneficial ownership of the securities"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"except to the extent of its pecuniary interest therein, if any"

investment manager financial

"Glenbrook Capital Management serves as the investment manager"

Section 16 regulatory

"for purposes of Section 16 of the Securities and Exchange Act of 1934"

Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.

FAQ

What insider transaction did Glenbrook Capital report for SenesTech (SNES)?

Glenbrook Capital Management reported buying 35,000 SenesTech shares. The purchase occurred on July 20, 2026 at an average price of $1.4734 per share, increasing the indirectly held position for a managed account to 1,057,824 shares of common stock.

At what price did Glenbrook Capital buy SNES shares in this Form 4 filing?

The reported purchase price was $1.4734 per SNES share. Glenbrook Capital Management disclosed acquiring 35,000 shares of SenesTech common stock at this average per-share price in an open-market or private transaction dated July 20, 2026.

How many SenesTech (SNES) shares does the Glenbrook-managed account hold after this transaction?

The managed account holds 1,057,824 SNES shares after the purchase. Following the acquisition of 35,000 additional shares, Glenbrook Capital Management reported this total indirect holding of SenesTech common stock for the account it manages.

Is Glenbrook Capital Management a ten percent owner of SenesTech (SNES)?

Yes, Glenbrook Capital Management is identified as a ten percent owner. The reporting-person information classifies Glenbrook as a ten percent owner of SenesTech, Inc., which is why its transactions in SenesTech common stock trigger Section 16 reporting obligations.

How does Glenbrook Capital describe its beneficial ownership of SNES shares?

Glenbrook Capital disclaims full beneficial ownership of the SNES shares. It states the securities are held by a managed account and that it disclaims beneficial ownership for Section 16 purposes, except to the extent of its pecuniary interest in those securities, if any.

Was Glenbrook Capital’s SNES share purchase under a Rule 10b5-1 trading plan?

The transaction was not indicated as under a Rule 10b5-1 plan. The Form 4’s Rule 10b5-1 checkbox was not affirmed, meaning the July 20, 2026 purchase of 35,000 SenesTech shares was not reported as pursuant to a pre-arranged trading plan.

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Available on EDGAR 07/22/2026 - 08:00 PM Accepted by SEC EDGAR 07/22/2026 - 08:00 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

GLENBROOK CAPITAL MANAGEMENT

(Last) (First) (Middle)

5396 AVENUE 18 1/2

(Street)

CHOWCHILLA CALIFORNIA 93610

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/20/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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, $0.001 par value per share ("Common Stock")	07/20/2026		P		35,000	A	$1.4734	1,057,824	I	See footnote(1)

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. The securities to which this filing relates are held directly by a certain account for which Glenbrook Capital Management (the "Reporting Person") serves as the investment manager. 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.

	Glenbrook Capital Management, By: /s/ John David Kessler, Director	07/22/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)