GLENBROOK CAPITAL MANAGEMENT 4

4 · SenesTech, Inc. · Filed Mar 17, 2026

AI-generated summary of this filing

Updated Mar 18, 2026

SenesTech (SNES) 10% Owner Glenbrook Capital Buys Shares

What Happened

Glenbrook Capital Management, reported as a 10% owner and investment manager, made three purchases of SenesTech (SNES) common stock (code P — purchase) on March 13, 16 and 17, 2026. The buys totaled 171,034 shares for about $330,181, indicating net insider buying rather than selling.
Transactions: 146,249 shares @ $1.95 on 2026-03-13 ($285,434); 5,060 shares @ $1.86 on 2026-03-16 ($9,392); 19,725 shares @ $1.79 on 2026-03-17 ($35,355).

Key Details

Transaction dates/prices/amounts:
- 2026-03-13: 146,249 shares @ $1.95 = $285,434
- 2026-03-16: 5,060 shares @ $1.86 = $9,392
- 2026-03-17: 19,725 shares @ $1.79 = $35,355
Total acquired: 171,034 shares for ~$330,181.
Shares owned after transaction: The filing includes a correction to prior reported ownership (see footnote); the Form 4 corrects a prior understatement of 15,390 shares. Refer to the filed Form 4 for the exact post-transaction beneficial ownership number.
Footnotes of note:
- F1: Corrects a prior understatement of 15,390 shares reported in a Feb 19, 2026 Form 4; this filing updates the post-transaction ownership accordingly.
- F2: The securities are held directly by PFS Trust and the Glenbrook Capital Management Employee Profit-Sharing Plan; Glenbrook serves as investment manager and disclaims beneficial ownership except to the extent of any pecuniary interest.
Filing date: Form 4 filed March 17, 2026, reporting transactions on March 13, 16 and 17, 2026.

Context

This is institutional/10% owner activity (Glenbrook acts as investment manager for trust/plan accounts), not an individual executive. Institutional purchases can reflect manager-driven portfolio activity rather than personal insider sentiment.
These were open-market/private purchases (code P). Purchases are generally viewed by retail investors as a potentially bullish signal, but they do not on their own reveal the manager’s motives.

Form 4

Period: 2026-03-13

10% Owner

Transactions

Purchase
Common Stock, $0.001 par value per share ("Common Stock")
[F1][F2]
2026-03-13$1.95/sh+146,249$285,434→ 865,850 total(indirect: See footnote)
Purchase
Common Stock
[F2]
2026-03-16$1.86/sh+5,060$9,392→ 870,910 total(indirect: See footnote)
Purchase
Common Stock
[F2]
2026-03-17$1.79/sh+19,725$35,355→ 890,635 total(indirect: See footnote)

Footnotes (2)

[F1]The amount of securities beneficially owned by the Reporting Person following the transaction that occurred on February 17, 2026, as reported in column 5 of Table I of the Form 4 filed by the Reporting Person on February 19, 2026, was understated by 15,390 shares of Common Stock. This understatment affected the amount of securities beneficially owned by the Reporting Person as reported in column 5 of Table I in all subsequent transactions reported on that Form 4. The amount of securities beneficially owned by the Reporting Person following the transaction reported on this line corrects this understatement.
[F2]The securities to which this filing relates are held directly by PFS Trust ("PFS Trust") and Glenbrook Capital Management Inc. Employee Profit-Sharing Plan ("GCM EPSP"). Glenbrook Capital Management (the "Reporting Person") serves as the investment manager to each of PFS Trust and GCM EPSP. The Reporting Person disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities and Exchange Act of 1934, as amended, except to the extent of its pecuniary interest therein, if any.

Signature

Glenbrook Capital Management, By: /s/ John David Kessler, Director|2026-03-17

1 file