GM
Insider
Glenbrook Capital Management
10% ownerGlenbrook Capital Management (10% owner) filed 2 Form 4 reports as a reporting entity in the trailing twelve months (2 purchases, 0 sales), most often in SenesTech, Inc. (SNES). Across 1 priced purchase filing, the average 21-session return was -13.3% from execution and -13.7% from disclosure (delay-adjusted; derived). The largest single filing was $706K of SNES (983,804 sh across 3 lots, as filed), executed Oct 15. Data as of Nov 8 2026.
Add to watchlistReturn, ttmiAverage return per filing, trailing twelve months
-13.3%
avg across 1 priced filings
Delay-adjustediThe same average, entered at disclosure dates
-13.7%
same 1 filings, from disclosure
Filings, ttm
2
2 buys · 0 sells
Median delay
4d
execution → disclosure
Volume, ttmiDollar value disclosed in the trailing twelve months
$991K
shares × price, as filed
Last traded
Oct 19
Filed Oct 19
Median ADV $718K across their filed names
50% of their measured filings could not be priced (delisted or unquoted names). The returns above cover only what still trades.
Open performance→Volume by month
Buys $991K
Sells $0
Shares × price, as filed · by filing month · past 24 months
Sectors filed on
Basic Materials
2 filings
Sector per market data · by filing · past 12 months
Most traded names
SNESRecent filings
SNESPURCHASE
SenesTech, Inc.
View filing →
$706K983,804 sh across 3 lots
Exec Oct 15
Filed Oct 19 · 5:38 PM ET SNESPURCHASE SenesTech, Inc. View filing → $285K
146,249 sh × $1.95
Exec Mar 13
Filed Mar 17 · 8:10 PM ET