🕵️ One STOP Systems, Inc. ($OSS)

SEC insider & ownership activity, last 12 months · CIK 1394056 · every row links its SEC filing

Over the last 12 months insiders sold $369K with no open-market buying against it. Bassett David George sold $141K in discretionary trades (May). No red-flag 8-Ks in the window.

Aug 2025: net +$0 Sep 2025: net +$0 Oct 2025: net +$0 Nov 2025: net +$0 Dec 2025: net +$0 Jan 2026: net +$0 Mar 2026: net +$0 Mar 2026: net +$0 Apr 2026: net +$0 May 2026: net -$369K Jun 2026: net +$0 Jul 2026: net +$0
Monthly net open-market insider flow, last 12 months (up = net buying)

Insider flow

0 buyers, $0 (0 lots) · 3 sellers, $369K (3 lots)

InsiderBuysBoughtSellsSoldLast
Bassett David George0– 1$141KMay 26, 2026
Gregory W. Matz0– 1$140KMay 26, 2026
Mitchell Herbets0– 1$88KMay 26, 2026

5%+ holders

HolderStakeClassScheduleEvent
Cynthia Paul 6.6% 13GNov 18, 2025 filing ↗
JANE Street Group, LLC 5.6% 13GMay 13, 2026 filing ↗
Galkin Vladimir 5.0% 13GJul 24, 2026 filing ↗
Galkin Angelica 5.0% 13GJul 24, 2026 filing ↗
Angelica Galkin Revocable Trust, Dated April 21, 2018 exited 13GJul 24, 2026 filing ↗

Planned insider sales (Form 144)

SellerPlannedApprox. sale date
Gregory W. Matz$138KMay 26, 2026 filing ↗
Mitchell Herbets$88KMay 26, 2026 filing ↗
Bassett David George$143KMay 26, 2026 filing ↗

Material events (8-K)

ItemEvent date
Officer/director changes (5.02)May 13, 2026 filing ↗
Shareholder vote (5.07)May 13, 2026 filing ↗
Financial Statements and Exhibits (9.01)May 13, 2026 filing ↗
Earnings (2.02)May 7, 2026 filing ↗
Reg FD disclosure (7.01)May 7, 2026 filing ↗
Reg FD disclosure (7.01)Apr 15, 2026 filing ↗
Material agreement (1.01)Jan 6, 2026 filing ↗
Acquisition or disposition (2.01)Jan 6, 2026 filing ↗
Reg FD disclosure (7.01)Jan 6, 2026 filing ↗
Financial Statements and Exhibits (9.01)Jan 6, 2026 filing ↗
Material agreement (1.01)Oct 1, 2025 filing ↗
Reg FD disclosure (7.01)Oct 1, 2025 filing ↗