OSS Institutional Ownership & Shareholders
ONE STOP SYSTEMS INC (OSS) is currently held by 104 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $185.56M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of OSS tracked by InsiderSet, reporting ownership valued at approximately $33.41M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $9.45M, representing an estimated loss of -71.73% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 69% of the total disclosed OSS value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Jane Street Group, Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in ONE STOP SYSTEMS INC (OSS).
This page ranks the largest institutional OSS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
104
Total Reported Value
$185.56M
Largest Holder
Blackrock, Inc.
Largest Position
$33.41M
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
145
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 1,837,840 | $33,411,931 | $9,446,498 | -$23,965,433 | -71.73% | |
| Jane Street Group, Llc | 0.02% | 1,309,455 | $23,805,892 | $6,730,599 | -$17,075,293 | -71.73% | |
| Vanguard Capital Management Llc | 0.00% | 974,568 | $17,717,646 | $5,009,280 | -$12,708,366 | -71.73% | |
| Geode Capital Management, Llc | 0.00% | 572,918 | $10,418,097 | $2,944,799 | -$7,473,298 | -71.73% | |
| Bard Associates Inc | 2.12% | 526,370 | $9,569,407 | $2,705,542 | -$6,863,865 | -71.73% | |
| Palisades Investment Partners, Llc | 2.14% | 414,392 | $7,533,647 | $2,129,975 | -$5,403,672 | -71.73% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 407,860 | $7,414,895 | $2,096,400 | -$5,318,495 | -71.73% |
| State Street Corp | 0.00% | 384,259 | $6,985,829 | $1,975,091 | -$5,010,738 | -71.73% | |
| Millennium Management Llc | 0.00% | 337,710 | $6,139,568 | $1,735,829 | -$4,403,739 | -71.73% | |
| Qube Research & Technologies Ltd | 0.01% | 318,919 | $5,797,947 | $1,639,244 | -$4,158,703 | -71.73% | |
| Northern Trust Corp | 0.00% | 178,101 | $3,237,877 | $915,439 | -$2,322,438 | -71.73% | |
| Two Sigma Investments, Lp | 0.00% | 162,193 | $2,948,669 | $833,672 | -$2,114,997 | -71.73% | |
| Vanguard Fiduciary Trust Co | 0.00% | 157,365 | $2,860,896 | $808,856 | -$2,052,040 | -71.73% | |
| Vanguard Portfolio Management Llc | 0.00% | 155,408 | $2,825,317 | $798,797 | -$2,026,520 | -71.73% | |
| New York State Common Retirement Fund | 0.00% | 147,343 | $2,678,696 | $757,343 | -$1,921,353 | -71.73% | |
| Dimensional Fund Advisors Lp | 0.00% | 146,871 | $2,670,115 | $754,917 | -$1,915,198 | -71.73% | |
| Squarepoint Ops Llc | 0.00% | 131,346 | $2,387,870 | $675,118 | -$1,712,752 | -71.73% | |
| Informed Momentum Co Llc | 0.21% | 130,568 | $2,373,726 | $671,120 | -$1,702,606 | -71.73% | |
| Dnb Asset Management As | 0.01% | 118,759 | $2,159,039 | $610,421 | -$1,548,618 | -71.73% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 99,272 | $1,804,765 | $510,258 | -$1,294,507 | -71.73% | |
| Trexquant Investment Lp | 0.01% | 98,442 | $1,789,676 | $505,992 | -$1,283,684 | -71.73% | |
| Morgan Stanley | 0.00% | 88,902 | $1,616,239 | $456,956 | -$1,159,283 | -71.73% | |
| Osaic Holdings, Inc. | 0.00% | 86,513 | $1,572,774 | $444,677 | -$1,128,097 | -71.73% | |
| Sei Investments Co | 0.00% | 84,393 | $1,534,265 | $433,780 | -$1,100,485 | -71.73% | |
| Goldman Sachs Group Inc | 0.00% | 75,306 | $1,369,063 | $387,073 | -$981,990 | -71.73% | |
| Ubs Group Ag | 0.00% | 72,184 | $1,312,305 | $371,026 | -$941,279 | -71.73% | |
| Citadel Advisors Llc | 0.00% | 71,202 | $1,294,452 | $365,978 | -$928,474 | -71.73% | |
| Russell Investments Group, Ltd. | 0.00% | 66,596 | $1,210,724 | $342,303 | -$868,421 | -71.73% | |
| Charles Schwab Investment Management Inc | 0.00% | 65,276 | $1,186,718 | $335,519 | -$851,199 | -71.73% | |
| Bank Of New York Mellon Corp | 0.00% | 62,473 | $1,135,753 | $321,111 | -$814,642 | -71.73% | |
| Raymond James Financial Inc | 0.00% | 61,924 | $1,125,779 | $318,289 | -$807,490 | -71.73% | |
| Citigroup Inc | 0.00% | 54,956 | $999,100 | $282,474 | -$716,626 | -71.73% | |
| Lpl Financial Llc | 0.00% | 54,225 | $985,811 | $278,717 | -$707,095 | -71.73% | |
| Sg Americas Securities, Llc | 0.00% | 47,014 | $855,000 | $241,652 | -$613,348 | -71.74% | |
| Engineers Gate Manager Lp | 0.01% | 41,732 | $758,688 | $214,502 | -$544,186 | -71.73% | |
| Polymer Capital Management (Hk) Ltd | 0.07% | 38,000 | $690,840 | $195,320 | -$495,520 | -71.73% | |
| Nuveen, Llc | 0.00% | 36,308 | $660,080 | $186,623 | -$473,457 | -71.73% | |
| Stifel Financial Corp | 0.00% | 32,920 | $598,488 | $169,209 | -$429,279 | -71.73% | |
| Bank Of America Corp | 0.00% | 32,151 | $584,505 | $165,256 | -$419,249 | -71.73% | |
| Thompson Siegel & Walmsley Llc | 0.01% | 31,788 | $578,000 | $163,390 | -$414,610 | -71.73% | |
| Optimus Capital Advisors, Llc | 0.29% | 30,000 | $545,400 | $154,200 | -$391,200 | -71.73% | |
| Rhumbline Advisers | 0.00% | 27,871 | $506,686 | $143,257 | -$363,429 | -71.73% | |
| Acadian Asset Management Llc | 0.00% | 27,282 | $495,000 | $140,229 | -$354,771 | -71.67% | |
| Wells Fargo & Company/Mn | 0.00% | 26,784 | $486,933 | $137,670 | -$349,263 | -71.73% | |
| Deutsche Bank Ag\ | 0.00% | 22,348 | $406,286 | $114,869 | -$291,417 | -71.73% | |
| Fox Run Management, L.L.C. | 0.07% | 22,208 | $403,741 | $114,149 | -$289,592 | -71.73% | |
| Price T Rowe Associates Inc | 0.00% | 18,450 | $336,000 | $94,833 | -$241,167 | -71.78% | |
| Penbrook Management Llc | 0.20% | 38,200 | $333,486 | $196,348 | -$137,138 | -41.12% | |
| Occudo Quantitative Strategies Lp | 0.02% | 18,117 | $329,367 | $93,121 | -$236,246 | -71.73% | |
| Barclays Plc | 0.00% | 14,679 | $266,864 | $75,450 | -$191,414 | -71.73% |
Frequently asked questions about OSS
Who are the largest institutional holders of OSS?
The largest institutional holders of OSS reported in the latest SEC Form 13F filings include Blackrock, Inc., Jane Street Group, Llc, Vanguard Capital Management Llc, Geode Capital Management, Llc, and Bard Associates Inc. InsiderSet ranks institutional holders by their latest reported OSS position.
What is OSS institutional ownership?
This page tracks OSS positions reported by institutional investment managers through SEC Form 13F. ONE STOP SYSTEMS INC (OSS) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own OSS?
InsiderSet currently tracks 104 institutional managers reporting OSS holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of OSS shareholders.
How much OSS stock do institutions own?
Institutional investment managers disclosed approximately $185.56M in OSS holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was OSS institutional ownership last updated?
The latest OSS institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional OSS holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its OSS position after the reporting date.
Are institutions buying or selling OSS?
Institutional buying and selling can be analyzed by comparing OSS positions across consecutive 13F reporting periods. InsiderSet's OSS Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View OSS ownership changes.
How has OSS institutional ownership changed over time?
InsiderSet tracks OSS institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.