GLENBROOK CAPITAL MANAGEMENT has bought SNES on 7 days since May 2026

GLENBROOK CAPITAL MANAGEMENT is an investment management firm and corporate insider that files as a beneficial owner of public company securities, including recent insider transactions in SenesTech, Inc. (SNES) where it has reported ownership of approximately 9.99% as a 10% owner-level shareholder.( Public filings and ownership databases identify GLENBROOK CAPITAL MANAGEMENT as an institutional investor/organizational holder rather than an individual, with an insider profile and portfolio reporting structure consistent with a fund manager or general partner entity.( In connection with SenesTech, GLENBROOK CAPITAL MANAGEMENT has disclosed open-market purchases and changes in beneficial ownership via Schedule 13D/13G and related filings as required under U.S. securities laws for holders exceeding 5% of a class of equity securities.(

Beyond SenesTech, GLENBROOK CAPITAL MANAGEMENT has been described in SEC correspondence as the general partner of Glenbrook Capital, L.P., indicating a role managing or overseeing a pooled investment vehicle.( The firm has also appeared in shareholder and governance contexts, including activism or engaged ownership activities at Tejon Ranch Co., where it has been referenced as a long-time shareholder in public communications.( Specific details about its founding date, broader investment strategy, and leadership team are not fully disclosed in the available public sources; however, its structure as a general partner to an investment fund and its pattern of SEC filings position it as a specialized investment management entity focused on concentrated positions and active engagement with portfolio companies.(

Written by Perplexity from public sources.