OSS ONE STOP SYS INC
FollowCOMMON STOCK (common), issuer CIK 1394056
40 managers (40 13F filers) reported a position in OSS shares at 2025-06-30, 6,432,455 shares in all. 10 filers opened a position and 4 filers sold out during the quarter.
- Managers
- 40
- 13F filers
- 40
- New
- 10
- Added
- 13
- Reduced
- 11
- Sold out
- 4
- Shares held by filers
- 6,432,455
Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.
13D and 13G filers
Each filer's latest stake. The shares are the aggregate the reporting persons state, which can include entities that file no 13F.
- Galkin Vladimir (group Galkin Vladimir)
200,000 shares, 0.8% in a 13G/A as of 2026-10-07,0001376474-26-000639
Accepted , ingested
Insider trades
No Form 4 transaction on this security in the data.
13F holders, Q2 2025
Filers in the available 13F reports with a share position at 2025-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.
| Holder | Shares | Value | % of portfolio | Change | Source |
|---|---|---|---|---|---|
| Lynrock Lake LP | 2,049,374 | $7.28M | 0.64% | -17,292 | 13F-HRTimeline |
| BARD ASSOCIATES INC | 947,857 | $3.36M | 1.08% | -81,923 | 13F-HRTimeline |
| VANGUARD GROUP INCin group VANGUARD GROUP INC | 743,221 | $2.64M | <0.01% | +9,059 | 13F-HRTimelineGroup |
| MARSHALL WACE, LLPin group MARSHALL WACE, LLP | 476,393 | $1.69M | <0.01% | +437,664 | 13F-HRTimelineGroup |
| Pacific Ridge Capital Partners, LLC | 454,872 | $1.61M | 0.39% | -6,266 | 13F-HRTimeline |
| JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC | 268,182 | $952K | <0.01% | +251,850 | 13F-HRTimelineGroup |
| GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC | 199,729 | $709K | <0.01% | +1,837 | 13F-HRTimelineGroup |
| CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC | 153,538 | $545K | <0.01% | +123,107 | 13F-HRTimelineGroup |
| Archon Capital Management LLC | 153,098 | $543K | 0.45% | 0 | 13F-HRTimeline |
| Informed Momentum Co LLC | 135,388 | $481K | 0.07% | new | 13F-HRTimeline |
| RENAISSANCE TECHNOLOGIES LLC | 101,860 | $362K | <0.01% | +9,000 | 13F-HRTimeline |
| BlackRock, Inc.in group BlackRock, Inc. | 92,226 | $327K | <0.01% | -2,369 | 13F-HRTimelineGroup |
| STATE STREET CORPin group STATE STREET CORP | 84,976 | $302K | <0.01% | +19,100 | 13F-HRTimelineGroup |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 72,791 | $258K | 0.05% | -852 | 13F-HRTimeline |
| MORGAN STANLEYin group MORGAN STANLEY | 72,503 | $257K | <0.01% | +40,200 | 13F-HRTimelineGroup |
| SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO… | 55,631 | $197K | <0.01% | +43,246 | 13F-HRTimelineGroup |
| Virtu Financial LLCin group Virtu Financial LLC | 50,425 | $179K | 0.01% | new | 13F-HRTimelineGroup |
| NORTHERN TRUST CORPin group NORTHERN TRUST CORP | 44,289 | $157K | <0.01% | +4,630 | 13F-HRTimelineGroup |
| HRT FINANCIAL LP | 39,158 | $139K | <0.01% | new | 13F-HRTimeline |
| DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP | 38,371 | $136K | <0.01% | +3,477 | 13F-HRTimelineGroup |
| GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC | 37,020 | $131K | <0.01% | +10,677 | 13F-HRTimelineGroup |
| Cubist Systematic Strategies, LLC | 21,290 | $75.6K | <0.01% | new | 13F-HRTimeline |
| BAKER TILLY WEALTH MANAGEMENT, LLC | 20,000 | $71K | 0.03% | 0 | 13F-HRTimeline |
| Legato Capital Management LLC | 17,132 | $60.8K | 0.01% | -852 | 13F-HRTimeline |
| Quadrature Capital Ltdin group Quadrature Capital Ltd | 16,025 | $57K | <0.01% | new | 13F-HRTimelineGroup |
| SIMPLEX TRADING, LLC | 13,558 | $48K | <0.01% | -3,742 | 13F-HRTimeline |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co | 12,911 | $45.8K | <0.01% | 0 | 13F-HRTimelineGroup |
| Walleye Capital LLCin group Walleye Capital LLC | 12,857 | $45.6K | <0.01% | new | 13F-HRTimelineGroup |
| Granite Investment Partners, LLC | 11,068 | $39.3K | <0.01% | new | 13F-HRTimeline |
| Marex Group Ltdin group Marex Group Ltd | 10,000 | $35.5K | <0.01% | new | 13F-HRTimelineGroup |
| UBS Group AGin group UBS Group AG | 8,731 | $31K | <0.01% | -11,811 | 13F-HRTimelineGroup |
| GROUP ONE TRADING LLC | 8,348 | $29.6K | <0.01% | -1,862 | 13F-HRTimeline |
| BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/ | 5,017 | $17.8K | <0.01% | +4,866 | 13F-HRTimelineGroup |
| MAI Capital Management | 1,441 | $5.12K | <0.01% | 0 | 13F-HRTimeline |
| Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T… | 1,144 | $4.06K | <0.01% | -605 | 13F-HRTimelineGroup |
| WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN | 1,000 | $3.55K | <0.01% | 0 | 13F-HRTimelineGroup |
| OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC. | 500 | $1.77K | <0.01% | new | 13F-HR/ATimelineGroup |
| CITIGROUP INCin group CITIGROUP INC | 330 | $1.17K | <0.01% | new | 13F-HRTimelineGroup |
| SBI Securities Co., Ltd. | 201 | $714 | <0.01% | -100 | 13F-HRTimeline |
| CONCOURSE FINANCIAL GROUP SECURITIES, I… | 0 | $0 | 0 | 13F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios. |
Events
Galkin Vladimir and 2 other reporting persons reported 200,000 OSS shares, 0.8% of the class, as of 2026-10-07, in a 13G/A filed 2026-10-09. 0001376474-26-000639
Accepted , ingested