Senestech (SNES): GLENBROOK CAPITAL MANAGEMENT raised its SNES stake to 40.0% from 38.0% 40.0%

40.0%

Stake · was 38.0%

2.17M

Shares owned

Stake as of

Oct 21, 2026

Filed

Oct 22, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Sep 9, 2026Insider · 1 personInsiders: 2 purchases (~$2K)
2. Sep 14, 2026InsiderCEO purchased ~$840 of SNES shares in the open market
3. Sep 28, 2026InsiderCEO purchased ~$1.3K of SNES shares in the open market
4. Oct 15, 2026Company filing · Form 8-K · ResultsReported its results
5. Oct 15, 2026Insider · 5 days before an 8-K10% owner purchased ~$327K of SNES shares in the open market
6. Oct 16, 2026Insider · 4 days before an 8-K10% owner purchased ~$114K of SNES shares in the open market
7. Oct 19, 20265% stakeGLENBROOK CAPITAL MANAGEMENT filed an activist stake (13D) of 38.0%
8. Oct 19, 2026Insider · 1 day before an 8-K10% owner purchased ~$265K of SNES shares in the open market
9. Oct 20, 2026Company filing · Form 8-K · Listing notice, Reg FDReceived a notice from its stock exchange, and shared information with investors“On October 20, 2026, SenesTech, Inc. (the “Company”) received a letter from the listing qualifications staff (the “Staff”) of The Nasdaq Stock Market LLC (“Nasdaq”) providing notification that the bid price for the Company’s common stock had closed below $1.00 per share for the previous 30 consecutive business days and the Company’s common stock no longer meets the minimum bid price requirement for continued listing…”
10. Oct 20, 2026Insider10% owner purchased ~$25K of SNES shares in the open market
11. Oct 21, 2026Insider10% owner purchased ~$44K of SNES shares in the open market

What came next

1. Oct 22, 20265% stakeGLENBROOK CAPITAL MANAGEMENT filed an activist stake (13D) of 40.0%
2. Oct 22, 2026Insider10% owner purchased ~$6K of SNES shares in the open market
3. Oct 26, 20265% stakeLeBeau Justin Michael filed an activist stake (13D) of 5.4%
4. Oct 28, 2026Insider · 13 days before results10% owner purchased ~$27K of SNES shares in the open market
5. Oct 30, 20265% stakeFakhoury Ranni Emad reported a passive stake (13G) of 5.0%
6. Oct 30, 20265% stakeGLENBROOK CAPITAL MANAGEMENT filed an activist stake (13D) of 40.5%
7. Oct 30, 2026Insider · 11 days before results10% owner purchased ~$2K of SNES shares in the open market
8. Nov 10, 2026Company filing · Form 8-K · ResultsReported its results

How to read SEC Schedule 13D

A Schedule 13D and a Schedule 13G both disclose beneficial ownership of more than 5% of a US company's voting shares. A 13D is the long form, filed by holders who may seek to influence or control the company, and it must state what they intend to do. A 13G is the short form, open only to passive holders and to certain institutions holding in the ordinary course of business, and it asks no question about intent.

Full guide: Schedule 13D vs Schedule 13G: what is the difference?

What else is on file for Senestech

For Senestech, OQRO holds 13 insider filings (SEC Form 4 or Form 144) and 5 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its SNES page.

How this filing works

• Schedule 13D vs 13G

Other disclosures at Senestech

• SEC Form 4Oct 31, 2026
• SEC Form 4Oct 31, 2026
• SEC Schedule 13DOct 30, 2026
• SEC Schedule 13GOct 30, 2026
• SEC Schedule 13DOct 26, 2026
• SEC Form 4Oct 22, 2026

Everything OQRO holds on this company is on its SNES page.