Senestech (SNES)GLENBROOK CAPITAL MANAGEMENT disclosed a 38.0% stake in SNES and may seek to influence the company 38.0%

38.0%

Stake

2.06M

Shares owned

Stake as of

Oct 15, 2026

Filed

Oct 19, 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. Aug 14, 2026InsiderCEO purchased ~$1.2K of SNES shares in the open market
2. Sep 9, 2026Insider · 1 personInsiders: 2 purchases (~$2K)
3. Sep 14, 2026InsiderCEO purchased ~$840 of SNES shares in the open market
4. Sep 28, 2026InsiderCEO purchased ~$1.3K of SNES shares in the open market
5. Oct 15, 2026Company filing · Form 8-K · ResultsReported its results
6. Oct 15, 2026Insider10% owner purchased ~$327K of SNES shares in the open market

What came next

1. Oct 16, 2026Insider10% owner purchased ~$114K of SNES shares in the open market
2. Oct 19, 20265% stakeGLENBROOK CAPITAL MANAGEMENT filed an activist stake (13D) of 38.0%
3. Oct 19, 2026Insider10% owner purchased ~$265K of SNES shares in the open market

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 11 insider filings (SEC Form 4 or Form 144) and 1 fund holdings report (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 19, 2026
• SEC Form 4Oct 19, 2026
• SEC Form 4Oct 19, 2026
• SEC Form 4Sep 29, 2026
• SEC Form 4Sep 15, 2026
• SEC Form 4Sep 11, 2026

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