Glenbrook Capital Management filed a Form 4 with the SEC on October 30, 2026, disclosing two open-market purchases of SenesTech, Inc. common stock totaling 30,000 shares on October 28 and October 30, 2026.

Key Highlights

  • First purchase: Glenbrook Capital Management acquired 28,000 shares of SenesTech common stock on October 28, 2026, at a weighted average price of $0.9651 per share, with individual transaction prices ranging from $0.8299 to $1.00.
  • Second purchase: An additional 2,000 shares were acquired on October 30, 2026, at a weighted average price of $1.0167 per share, with individual transaction prices ranging from $0.9870 to $1.0900.
  • Resulting ownership: Following both transactions, Glenbrook Capital Management reported indirect beneficial ownership of 2,196,973 shares of common stock.
  • Relationship to issuer: Glenbrook Capital Management is identified in the filing as a 10% owner of SenesTech, Inc. (NASDAQ:SNES).
  • Warrant holdings corrected: The filing also corrects previously reported Series I Common Stock Warrants, disclosing indirect holdings exercisable for an aggregate of 180,000 shares, and corrects the expiration date to November 22, 2026.
  • Exercise restrictions: According to the filing, Glenbrook currently cannot exercise the warrants because doing so would cause beneficial ownership to exceed the 4.99% or 9.99% caps specified in the warrant terms.

Glenbrook Capital Management's October Purchases and Warrant Correction in SenesTech

According to the filing, Glenbrook Capital Management, based in Minden, Nevada, made two separate open-market purchases of SenesTech, Inc. common stock in late October 2026. The first transaction, dated October 28, 2026, involved the acquisition of 28,000 shares at a weighted average price of $0.9651, with individual prices spanning $0.8299 to $1.00 inclusive. The second transaction, on October 30, 2026, covered an additional 2,000 shares at a weighted average price of $1.0167, with prices ranging from $0.9870 to $1.0900 inclusive. Both transactions were coded "P" (open-market purchase) and resulted in indirect beneficial ownership of 2,196,973 shares following the second trade.

The filing notes that the securities are held in accounts for which Glenbrook Capital Management serves as investment manager. Glenbrook "disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein," and states that "this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."

The Form 4 also includes a correction to the warrant disclosure from Glenbrook's Form 3 filed February 2, 2026. The corrected filing states that Glenbrook's indirect holdings of Series I Common Stock Warrants are exercisable for an aggregate of 180,000 shares of common stock, split between 90,000 shares held by PFS Trust and 90,000 shares held by the Glenbrook Capital Management Inc. Employees Profit-Sharing Plan. The filing also corrects the expiration date of these warrants, which the filing states expire on the fifteen-month anniversary of the effective date of the issuer's resale registration statement on Form S-3 (File No. 333-289650), which became effective on August 22, 2025, making the expiration November 22, 2026, or the next succeeding trading day, November 23, 2026.

What Was Disclosed

Glenbrook Capital Management, a 10% owner of SenesTech, Inc. (NASDAQ:SNES), reported two open-market purchases totaling 30,000 shares between October 28 and October 30, 2026, and corrected prior warrant disclosures to reflect aggregate indirect holdings of 180,000 warrant shares.