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GLENBROOK CAPITAL MANAGEMENT

CIK 1273782 · last filed 2026-08-10

GLENBROOK CAPITAL MANAGEMENT is a corporate insider who has filed 15 SEC Form 4 insider transactions across 3 companies since 2018. The most recent filing shows the insider bought $27.9K of SNES on Aug 10, 2026. Across all open-market trades the lifetime net is +$1.3M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $923.1K across reported positions. The firm reports its address in Chowchilla, CA. 16 SEC filings were submitted jointly with GLENBROOK CAPITAL LP.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$923.1K

Companies

3

Total Filings

15

Lifetime Open-Market Net

$1.28M

Filer Profile

Reported Address
5396 AVENUE 18 1/2
CHOWCHILLA, CA 93610
Phone
(650) 441-9525
State of Incorporation
NV
Related Filers
GLENBROOK CAPITAL LP — 16 joint filings, latest 2018-12-14
ROBERT W LISHMAN — 1 joint filings, latest 2010-05-03
YELLOWJACKET, LP — 1 joint filings, latest 2010-05-03
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
SNES 10%+ Owner 1,072,804 $0.86 $923.1K $981.3K 12 2026-08-10
Beeline Holdings, Inc. (EAST) Delisted 10%+ Owner 33,654 $0.89 $29.8K $186.4K 1 2018-11-20
Beeline Holdings, Inc. (EASTW) Delisted 10%+ Owner 662,885 — — $115.9K 2 2018-07-10

Recent Filings

15 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-08-10 SNES Buy (P) +21,490 $27.9K EDGAR
2026-07-22 SNES Buy (P) +35,000 $51.6K EDGAR
2026-07-02 SNES Buy (P) +35,000 $52.7K EDGAR
2026-06-29 SNES Buy (P) +25,416 $39.1K EDGAR
2026-06-22 SNES Buy (P) +8,264 $13.6K EDGAR
2026-06-08 SNES Buy (P) +28,389 $45.5K EDGAR
2026-05-18 SNES Buy (P) +32,120 $53.5K EDGAR
2026-03-17 SNES Buy (P) +171,034 $330.2K EDGAR
2026-02-19 SNES Buy (P) +85,901 $200.6K EDGAR
2026-02-13 SNES Buy (P) +31,346 $56.7K EDGAR
Showing 1–10 of 15
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.