One Stop Systems, Inc.
OSS- Exchange
- Nasdaq
- Industry
- Electronic Computers
- SEC CIK
- 0001394056
No open-market purchases or sales by One Stop Systems, Inc. insiders were filed in the last 90 days; 108 institutions reported holding it in 13F filings for Q2 2026, worth $193.4M in total; no superinvestor holds it.
Holders of 5% or more of OSS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of One Stop Systems, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G | 7.40%1.83M shares | New | Jul 29, 20261 filing | Jul 29, 2026 | SEC |
| Galkin Vladimir | 13G/A | 6.10%1.50M shares | +1.10 ppfrom 5.00% | Jul 24, 20262 filings | Jul 31, 2026 | SEC |
| Jane Street Group, LLC | 13G | 5.60%1.39M shares | New | May 13, 20261 filing | May 13, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
20 Schedule 13D and 13G filings on One Stop Systems, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Jul 31, 20265:16 PM ET | Galkin Vladimirand 2 others | 13G/A | 6.10%1.50M shares | +1.10 ppfrom 5.00% | Jul 31, 2026 | SEC |
| Jul 29, 20263:19 PM ET | BlackRock, Inc. | 13G | 7.40%1.83M shares | New | Jun 30, 2026 | SEC |
| Jul 24, 20268:55 PM ET | Galkin Vladimirand 2 others | 13G | 5.00%1.24M shares | New | Jul 24, 2026 | SEC |
| May 13, 20264:30 PM ET | Jane Street Group, LLCand 2 others | 13G | 5.60%1.39M shares | New | May 7, 2026 | SEC |
| Feb 17, 20264:12 PM ET | Lynrock Lake LPand 2 others | 13G/A | 2.70%665.9K shares | −3.90 ppfrom 6.60%Below 5% | Dec 31, 2025 | SEC |
| Feb 13, 20265:29 PM ET | Bard Associates Inc | 13G/A | 2.20%540.1K shares | –Below 5% | Nov 7, 2025 | SEC |
| Nov 18, 202511:37 AM ET | Lynrock Lake LPand 2 others | 13G/A | 6.60%1.44M shares | – | Sep 30, 2025 | SEC |
| Jun 6, 20258:30 PM ET | Horton Capital Partners Fund, L.P.and 3 others | 13D/A | 4.30%938.3K shares | −1.30 ppfrom 5.60%Below 5% | Jun 4, 2025 | SEC |
| May 13, 20254:34 PM ET | Barclays PLC | 13G/A | – | – | Mar 31, 2025 | SEC |
| Apr 18, 20255:32 PM ET | Horton Capital Partners Fund, L.P.and 3 others | 13D/A | 5.60%1.20M shares | – | Apr 16, 2025 | SEC |
| Mar 21, 20255:10 PM ET | Barclays PLC | 13G/A | 5.15%1.09M shares | 0.00 ppfrom 5.15% | Dec 31, 2024 | SEC |
| Feb 14, 20255:02 PM ET | Barclays PLC | 13G | 5.15%1.09M shares | New | Dec 31, 2024 | SEC |
| Feb 14, 2024 | Lynrock Lake LP | 13G/AOld format | – | – | – | SEC |
| Jan 4, 2024 | Bard Associates Inc | 13G/AOld format | – | – | – | SEC |
| Nov 3, 2023 | Horton Capital Partners Fund, L.P. | 13DOld format | – | New | – | SEC |
| Feb 14, 2023 | Lynrock Lake LP | 13GOld format | – | New | – | SEC |
| Feb 6, 2023 | Bard Associates Inc | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Bard Associates Inc | 13G/AOld format | – | – | – | SEC |
| Mar 11, 2021 | Ayrton Capital LLC | 13GOld format | – | New | – | SEC |
| Feb 12, 2021 | Bard Associates Inc | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell One Stop Systems, Inc. shares.
No Form 144 notices for One Stop Systems, Inc. are on file.