Glenbrook Lifts SenesTech Stake to 39.95% With Fresh Open-Market Buying
SNES sits 40% above its 52-week low of $0.55 on light trading volume (0.4× avg).
Summary
Glenbrook Capital bought another 103,875 SenesTech shares on October 20-22, raising its activist stake to 39.95% from 38.04% just as the company faces a Nasdaq bid-price deficiency notice.
Key Events · Ownership and Investor Activity · SNES
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Glenbrook Stake Reaches 39.95%
Glenbrook Capital now beneficially owns 2,166,973 shares, or 39.95% of the 5,423,542 shares outstanding as of August 4, 2026, up from 38.04% in the October 19 Amendment No. 1.
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Fresh Open-Market Purchases
Bought 36,375 shares at $0.6746 on 10/20, 60,000 at $0.7385 on 10/21 and 7,500 at $0.7986 on 10/22 — 103,875 shares total, all in the open market.
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Cumulative Cost Basis $4.14M
Amendment No. 2 discloses approximately $4.14 million paid in total to acquire the position, excluding brokerage commissions.
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Activist Campaign Against Dilution
Follows the October 19, 2026 Amendment No. 1, in which Glenbrook demanded board refreshment and an end to dilution; the added shares strengthen its hand in that campaign.
Analysis · SNES · Industrial Applications And Services
Glenbrook Capital, already the activist pushing for board refreshment and an end to dilution, added 103,875 shares over three sessions on October 20-22 at weighted-average prices of $0.6746 to $0.7986. That takes its beneficial ownership to 2,166,973 shares, or 39.95% of the 5,423,542 shares outstanding as of August 4, 2026, up from 38.04% three days earlier. The buying is small in dollars but it matters for control: a holder approaching 40% can exert heavy pressure in a proxy fight, and the purchases came just after Nasdaq notified the company on October 20 that its bid had sat below $1.00 for 30 straight business days. Glenbrook is buying into a sub-$1 stock with a going-concern warning and a live delisting notice, which raises the stakes of its governance campaign rather than settling it.
How filings like this one have moved
In the 30 days to Oct 22, 2026, 29.3% of the 1526 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.41%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, SNES was trading at $0.77 on NASDAQ in the Industrial Applications And Services sector, with a market capitalization of approximately $4.3M. The 52-week trading range was $0.55 to $3.90. This filing was assessed with neutral market sentiment and an importance score of 7 out of 10.