Glenbrook Capital (SNES) adds 28,389 SenesTech shares across three open‑market buys

Rhea-AI Filing Summary

Glenbrook Capital Management, as investment manager for a client account, reported open‑market purchases of SenesTech common stock. Across three trades on June 4, 5, and 8, 2026, the account bought a total of 28,389 shares at prices between $1.57 and $1.65 per share.

Following these purchases, the account held 954,144 SenesTech shares, reported as indirect ownership. Glenbrook Capital Management is identified as a 10% owner and disclaims beneficial ownership except to the extent of its pecuniary interest.

Insider Trade Summary

Net Buyer: 28,389 shares ($45,536)

Net Buy 3 txns

Insider GLENBROOK CAPITAL MANAGEMENT

Role null

Bought 28,389 shs ($46K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	7,000	$1.6148	$11K
Purchase	Common Stock	13,159	$1.5719	$21K
Purchase	Common Stock, $0.001 par value per share ("Common Stock")	8,230	$1.6461	$14K

Holdings After Transaction: Common Stock — 954,144 shares (Indirect, See footnote); Common Stock, $0.001 par value per share ("Common Stock") — 933,985 shares (Indirect, See footnote)

Footnotes (1)

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Key Figures

Total shares bought: 28,389 shares Shares after latest trade: 954,144 shares June 4, 2026 purchase: 8,230 shares at $1.6461 +2 more

5 metrics

Total shares bought 28,389 shares Open-market purchases across June 4–8, 2026

Shares after latest trade 954,144 shares Indirect holdings following June 8, 2026 purchase

June 4, 2026 purchase 8,230 shares at $1.6461 Open-market common stock buy

June 5, 2026 purchase 13,159 shares at $1.5719 Open-market common stock buy

June 8, 2026 purchase 7,000 shares at $1.6148 Open-market common stock buy

Key Terms

ten percent owner, indirect ownership, pecuniary interest, Section 16, +1 more

5 terms

ten percent owner financial

"is_ten_percent_owner": 1"

indirect ownership financial

""ownership_type": "indirect""

pecuniary interest financial

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

Section 16 regulatory

"beneficial ownership of the securities to which this filing relates for purposes of Section 16"

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.

open-market purchase financial

""transaction_action": "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

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Form 4 Insider Transactions: What Each Field Means →

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)
06/04/2026

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")	06/04/2026		P		8,230	A	$1.6461	933,985	I	See footnote(1)
Common Stock	06/05/2026		P		13,159	A	$1.5719	947,144	I	See footnote(1)
Common Stock	06/08/2026		P		7,000	A	$1.6148	954,144	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	06/08/2026
	** 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)

FAQ

What did Glenbrook Capital Management report in this SenesTech (SNES) Form 4?

Glenbrook Capital Management reported a series of open‑market purchases of SenesTech common stock. Over three trades, a client account it manages acquired 28,389 shares, increasing that account’s indirect holdings to 954,144 shares as disclosed in the filing.

How many SenesTech (SNES) shares did Glenbrook Capital Management buy and at what prices?

The managed account bought 28,389 SenesTech shares in total. Individual trades were 8,230 shares at $1.6461, 13,159 shares at $1.5719, and 7,000 shares at $1.6148 per share in open‑market transactions, according to the disclosure.

On what dates did Glenbrook Capital Management’s SenesTech (SNES) share purchases occur?

The reported SenesTech share purchases occurred on June 4, 2026, June 5, 2026, and June 8, 2026. Each date corresponds to a separate open‑market transaction that collectively increased the managed account’s indirect ownership position in the company.

What is Glenbrook Capital Management’s indirect SenesTech (SNES) shareholding after these transactions?

After the reported transactions, the managed account held 954,144 SenesTech common shares. This figure reflects the position following the June 8, 2026 purchase and is reported as indirect ownership in which Glenbrook has an investment‑manager role.

How is ownership of SenesTech (SNES) shares structured for Glenbrook Capital Management?

The shares are held directly by a specific client account for which Glenbrook Capital Management serves as investment manager. Glenbrook disclaims beneficial ownership for Section 16 purposes, except to the extent of any pecuniary interest it may have in that account’s holdings.

Is Glenbrook Capital Management considered a major holder of SenesTech (SNES)?

Yes. The filing identifies Glenbrook Capital Management as a ten percent owner of SenesTech. This status reflects its role related to the reported holdings in the managed account, while it disclaims beneficial ownership beyond its pecuniary interest in those securities.