ONE STOP SYSTEMS INC (OSS) Institutional Shareholders
ONE STOP SYSTEMS INC (OSS) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $190.51M in OSS holdings during the latest filing period.
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 $16.63M, representing an estimated loss of -50.22% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 68% 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
105
Total Reported Value
$190.51M
Largest Holder
Blackrock, Inc.
Largest Position
$33.41M
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
136
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 | $16,632,452 | -$16,779,479 | -50.22% | |
| Jane Street Group, Llc | 0.02% | 1,309,455 | $23,805,892 | $11,850,568 | -$11,955,324 | -50.22% | |
| Vanguard Capital Management Llc | 0.00% | 974,568 | $17,717,646 | $8,819,840 | -$8,897,806 | -50.22% | |
| Geode Capital Management, Llc | 0.00% | 572,918 | $10,418,097 | $5,184,908 | -$5,233,189 | -50.23% | |
| Bard Associates Inc | 2.12% | 526,370 | $9,569,407 | $4,763,649 | -$4,805,759 | -50.22% | |
| Palisades Investment Partners, Llc | 2.14% | 414,392 | $7,533,647 | $3,750,248 | -$3,783,399 | -50.22% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 407,860 | $7,414,895 | $3,691,133 | -$3,723,762 | -50.22% |
| State Street Corp | 0.00% | 384,259 | $6,985,829 | $3,477,544 | -$3,508,285 | -50.22% | |
| Millennium Management Llc | 0.00% | 337,710 | $6,139,568 | $3,056,276 | -$3,083,292 | -50.22% | |
| Qube Research & Technologies Ltd | 0.01% | 318,919 | $5,797,947 | $2,886,217 | -$2,911,730 | -50.22% | |
| Northern Trust Corp | 0.00% | 178,101 | $3,237,877 | $1,611,814 | -$1,626,063 | -50.22% | |
| Two Sigma Investments, Lp | 0.00% | 162,193 | $2,948,669 | $1,467,847 | -$1,480,822 | -50.22% | |
| Vanguard Fiduciary Trust Co | 0.00% | 157,365 | $2,860,896 | $1,424,153 | -$1,436,743 | -50.22% | |
| Vanguard Portfolio Management Llc | 0.00% | 155,408 | $2,825,317 | $1,406,442 | -$1,418,875 | -50.22% | |
| New York State Common Retirement Fund | 0.00% | 147,343 | $2,678,696 | $1,333,454 | -$1,345,242 | -50.22% | |
| Dimensional Fund Advisors Lp | 0.00% | 146,871 | $2,670,115 | $1,329,183 | -$1,340,932 | -50.22% | |
| Squarepoint Ops Llc | 0.00% | 131,346 | $2,387,870 | $1,188,681 | -$1,199,189 | -50.22% | |
| Informed Momentum Co Llc | 0.21% | 130,568 | $2,373,726 | $1,181,640 | -$1,192,086 | -50.22% | |
| Dnb Asset Management As | 0.01% | 118,759 | $2,159,039 | $1,074,769 | -$1,084,270 | -50.22% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 99,272 | $1,804,765 | $898,412 | -$906,353 | -50.22% | |
| Trexquant Investment Lp | 0.01% | 98,442 | $1,789,676 | $890,900 | -$898,776 | -50.22% | |
| Morgan Stanley | 0.00% | 88,902 | $1,616,239 | $804,563 | -$811,676 | -50.22% | |
| Osaic Holdings, Inc. | 0.00% | 86,513 | $1,572,774 | $782,943 | -$789,831 | -50.22% | |
| Sei Investments Co | 0.00% | 84,393 | $1,534,265 | $763,757 | -$770,508 | -50.22% | |
| Goldman Sachs Group Inc | 0.00% | 75,306 | $1,369,063 | $681,519 | -$687,544 | -50.22% | |
| Eddie Patel Inc | 0.79% | 72,895 | $1,325,233 | $659,700 | -$665,533 | -50.22% | |
| Ubs Group Ag | 0.00% | 72,184 | $1,312,305 | $653,265 | -$659,040 | -50.22% | |
| Citadel Advisors Llc | 0.00% | 71,202 | $1,294,452 | $644,378 | -$650,074 | -50.22% | |
| Russell Investments Group, Ltd. | 0.00% | 66,596 | $1,210,724 | $602,694 | -$608,030 | -50.22% | |
| Charles Schwab Investment Management Inc | 0.00% | 65,276 | $1,186,718 | $590,748 | -$595,970 | -50.22% | |
| Bank Of New York Mellon Corp | 0.00% | 62,473 | $1,135,753 | $565,381 | -$570,372 | -50.22% | |
| Raymond James Financial Inc | 0.00% | 61,924 | $1,125,779 | $560,412 | -$565,367 | -50.22% | |
| Citigroup Inc | 0.00% | 54,956 | $999,100 | $497,352 | -$501,748 | -50.22% | |
| Lpl Financial Llc | 0.00% | 54,225 | $985,811 | $490,736 | -$495,075 | -50.22% | |
| Sg Americas Securities, Llc | 0.00% | 47,014 | $855,000 | $425,477 | -$429,523 | -50.24% | |
| Engineers Gate Manager Lp | 0.01% | 41,732 | $758,688 | $377,675 | -$381,013 | -50.22% | |
| Penbrook Management Llc | 0.45% | 38,875 | $706,747 | $351,819 | -$354,928 | -50.22% | |
| Polymer Capital Management (Hk) Ltd | 0.07% | 38,000 | $690,840 | $343,900 | -$346,940 | -50.22% | |
| Inspire Investing, Llc | 0.03% | 37,967 | $690,240 | $343,601 | -$346,639 | -50.22% | |
| Nuveen, Llc | 0.00% | 36,308 | $660,080 | $328,587 | -$331,493 | -50.22% | |
| Stifel Financial Corp | 0.00% | 32,920 | $598,488 | $297,926 | -$300,562 | -50.22% | |
| Bank Of America Corp | 0.00% | 32,151 | $584,505 | $290,967 | -$293,538 | -50.22% | |
| Calamos Advisors Llc | 0.00% | 31,973 | $581,269 | $289,356 | -$291,913 | -50.22% | |
| Thompson Siegel & Walmsley Llc | 0.01% | 31,788 | $578,000 | $287,681 | -$290,319 | -50.23% | |
| Optimus Capital Advisors, Llc | 0.29% | 30,000 | $545,400 | $271,500 | -$273,900 | -50.22% | |
| Rhumbline Advisers | 0.00% | 27,871 | $506,686 | $252,233 | -$254,453 | -50.22% | |
| Acadian Asset Management Llc | 0.00% | 27,282 | $495,000 | $246,902 | -$248,098 | -50.12% | |
| Wells Fargo & Company/Mn | 0.00% | 26,784 | $486,933 | $242,395 | -$244,538 | -50.22% | |
| Essex Investment Management Co Llc | 0.06% | 25,674 | $466,753 | $232,350 | -$234,403 | -50.22% | |
| Deutsche Bank Ag\ | 0.00% | 22,348 | $406,286 | $202,249 | -$204,037 | -50.22% |
Frequently asked questions about OSS
Who owns the most OSS stock?
The largest holders of OSS are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ONE STOP SYSTEMS INC (OSS).
Is OSS widely held by superinvestors?
Many widely followed stocks like OSS appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly OSS is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.