As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of SenesTech, Inc. The largest reported stake is Glenbrook Capital Management's, at 40.51%. 10 filings are on record since August 12, 2025 (Schedule 13D/A, October 30, 2026).
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Key facts
- · Holder: Fakhoury Ranni Emad · Percent: 5% · Shares: 272,000 · SCHEDULE 13G
- · Reporting person: Glenbrook Capital Management · Sole voting: 0 · Shared voting: 2,196,973 · Sole dispositive: 0 · Shared dispositive: 2,196,973 · SCHEDULE 13D/A, 2026-10-30
- · Reporting person: LeBeau Justin Michael · Sole voting: 64,862 · Shared voting: 229,911 · Sole dispositive: 64,862 · Shared dispositive: 229,911 · SCHEDULE 13D, 2026-10-26
- · Holder: Glenbrook Capital Management · Percent: 39.95% · SCHEDULE 13D/A
- · Holder: Glenbrook Capital Management · Percent: 38.04% · SCHEDULE 13D/A
SenesTech, Inc. has 10 Schedule 13D or 13G filings on record since 2025-08-12. 4 holders' latest filing reports 5% or more of common stock, $0.001 par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Glenbrook Capital Management | 40.51% | 2,196,973 | SCHEDULE 13D/A, 2026-10-30 | 2026-10-28 |
| PFS Cap Mgt Co | 9.99% | 340,000 | SCHEDULE 13G/A, 2025-08-12 | 2025-06-30 |
| 5.4% | 294,773 | SCHEDULE 13D, 2026-10-26 | 2026-10-23 | |
| 5% | 272,000 | SCHEDULE 13G, 2026-10-30 | 2026-10-30 |
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More on SenesTech, Inc. and the records around it.
SenesTech, Inc. elsewhere on the record
- Leadership changes May 2026
- Who owns it
Companies that share a holder
- GLENBROOK CAPITAL MANAGEMENT also filed stake reports on 1 other company: INVO Fertility, Inc. (Oct 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Glenbrook Capital Management | 0 | 2,196,973 | 0 | 2,196,973 | SCHEDULE 13D/A, 2026-10-30 |
| LeBeau Justin Michael | 64,862 | 229,911 | 64,862 | 229,911 | SCHEDULE 13D, 2026-10-26 |
| Fakhoury Ranni Emad | 272,000 | 0 | 272,000 | 0 | SCHEDULE 13G, 2026-10-30 |
The latest filing identifies SenesTech, Inc. by CUSIP 81720R604 and gives its principal executive office as 13430 NORTH DYSART ROAD, SUITE 105, SURPRISE, AZ 85379 (SCHEDULE 13D/A, 2026-10-30).
Source of funds (Item 3)
Item 3 is hereby amended and restated as follows: Funds for the purchase of the securities reported herein were derived from the general working capital of the Glenbrook Funds and Accounts. A total of approximately $4.43 million (excluding brokerage commissions) was paid to acquire shares of Common Stock during the period in which the Reporting Person has been subject to reporting obligations under Section 13(d) or 13(g) of the Act with respect to the Common Stock.Glenbrook Capital Management, SCHEDULE 13D/A, 2026-10-30
The 294,773 shares of Common Stock beneficially owned by the Reporting Person were acquired in open-market purchases for an aggregate purchase price of approximately $229,261.57 (including brokerage commissions, where applicable).LeBeau Justin Michael, SCHEDULE 13D, 2026-10-26
Purpose of Transaction (Item 4)
Glenbrook Capital Management
Item 4 is hereby amended and supplemented by adding the following: In April 2026, the Reporting Person commissioned, at its expense, a strategic study of the rodent control market by Sandstrom Partners, Inc. ("Sandstrom"), the results of which were presented to the Board. On October 28, 2026, the Issuer announced that it had engaged Sandstrom as a strategic advisor on marketing and branding. The Reporting Person holds a minority ownership interest in Sandstrom.Item 4 of the SCHEDULE 13D/A filed 2026-10-30
LeBeau Justin Michael
The Reporting Person acquired the shares of Common Stock reported herein for investment purposes because he believes the Common Stock is significantly undervalued relative to the Issuer's underlying product potential and market opportunity. The Reporting Person believes that, in order to unlock stockholder value, the Issuer's Board of Directors (the "Board") and management team should exercise greater capital discipline, reduce operating expenses, and better align management and Board compensation and incentives with the interests of common stockholders. In particular, the Reporting Person believes the Issuer should end its recurring practice of dilutive equity offerings, which he believes have eroded stockholder value. The Reporting Person has reviewed the public letter sent to the Chairman of the Board by Glenbrook Capital Management ("Glenbrook") on October 19, 2026, which was filed as Exhibit 99.1 to Glenbrook's Schedule 13D/A on that date. He agrees with certain of the views expressed in that letter, including those regarding minimizing equity dilution, exercising capital and expense discipline, aligning executive and Board compensation with stockholder performance through performance conditioned equity in lieu of cash compensation, and improving commercial and marketing execution. The Reporting Person is acting independently and has not entered into any agreement, arrangement, or understanding with Glenbrook or any other stockholder with respect to the Issuer or its …The first part of Item 4 of the SCHEDULE 13D filed 2026-10-26; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-12 | PFS Cap Mgt Co | 9.99% | SCHEDULE 13G/A |
| 2025-11-24 | Glenbrook Capital Management | 9.99% | SCHEDULE 13G |
| 2026-02-02 | Glenbrook Capital Management | 11.4% | SCHEDULE 13G/A |
| 2026-03-18 | Glenbrook Capital Management | 16.8% | SCHEDULE 13G/A |
| 2026-07-23 | Glenbrook Capital Management | 19.95% | SCHEDULE 13D |
| 2026-10-19 | Glenbrook Capital Management | 38.04% | SCHEDULE 13D/A |
| 2026-10-22 | Glenbrook Capital Management | 39.95% | SCHEDULE 13D/A |
| 2026-10-26 | LeBeau Justin Michael | 5.4% | SCHEDULE 13D |
| 2026-10-30 | Glenbrook Capital Management | 40.51% | SCHEDULE 13D/A |
| 2026-10-30 | Fakhoury Ranni Emad | 5% | SCHEDULE 13G |
Questions about who owns SenesTech, Inc.
Who owns SenesTech, Inc.?
On this page, 4 holders' latest ownership filings report 5% or more of SenesTech, Inc.: Glenbrook Capital Management (40.51%, Schedule 13D/A, filed 2026-10-30), PFS Cap Mgt Co (9.99%, Schedule 13G/A, filed 2025-08-12), LeBeau Justin Michael (5.4%, Schedule 13D, filed 2026-10-26) and Fakhoury Ranni Emad (5%, Schedule 13G, filed 2026-10-30).
Who are the largest shareholders of SenesTech, Inc.?
By the share each holder's latest filing reports, the largest holders of SenesTech, Inc. on this page are Glenbrook Capital Management (40.51%), PFS Cap Mgt Co (9.99%) and LeBeau Justin Michael (5.4%).
When did Glenbrook Capital Management buy into SenesTech, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Glenbrook Capital Management on this page is the Schedule 13G, filed 2025-11-24, reporting 9.99%; its latest, Schedule 13D/A filed 2026-10-30, reports 40.51%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 10 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for SenesTech, Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| May 7, 2026 | Leadership change: Michael Edell appointed, President and Chief Executive Officer | — | Leadership changes | Source |
| March 25, 2025 | Form D, private offering | — | Form D page | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.