ONE STOP SYSTEMS INC (OSS) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $59.90M in OSS holdings during the latest filing period.
Vanguard Capital Management Llc is currently the largest disclosed institutional shareholder of OSS tracked by InsiderSet, reporting ownership valued at approximately $7.26M in its March 31, 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 $17.45M, representing an estimated gain of +140.16% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 66% of the total disclosed OSS value among the investors covered in this analysis. Major shareholders include Vanguard Capital Management Llc, Jane Street Group, Llc, Blackrock, Inc., 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
76
Total Reported Value
$59.90M
Largest Holder
Vanguard Capital Management Llc
Largest Position
$7.26M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
94
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Vanguard Capital Management Llc | 0.00% | 959,588 | $7,264,081 | $17,445,310 | +$10,181,229 | +140.16% | |
| Jane Street Group, Llc | 0.01% | 874,558 | $6,620,404 | $15,899,464 | +$9,279,060 | +140.16% | |
| Blackrock, Inc. | 0.00% | 597,303 | $4,521,583 | $10,858,969 | +$6,337,386 | +140.16% | |
| Bard Associates Inc | 1.03% | 540,666 | $4,092,842 | $9,829,308 | +$5,736,466 | +140.16% | |
| Morgan Stanley | 0.00% | 431,919 | $3,269,627 | $7,852,287 | +$4,582,660 | +140.16% | |
| Marshall Wace, Llp | 0.00% | 418,978 | $3,171,663 | $7,617,020 | +$4,445,357 | +140.16% | |
| Ubs Group Ag | 0.00% | 407,014 | $3,081,096 | $7,399,515 | +$4,318,419 | +140.16% | |
| Millennium Management Llc | 0.00% | 400,729 | $3,033,519 | $7,285,253 | +$4,251,734 | +140.16% | |
| Citadel Advisors Llc | 0.00% | 356,676 | $2,700,037 | $6,484,370 | +$3,784,333 | +140.16% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 259,960 | $1,967,897 | $4,726,073 | +$2,758,176 | +140.16% |
| Dnb Asset Management As | 0.01% | 252,733 | $1,913,189 | $4,594,686 | +$2,681,497 | +140.16% | |
| Geode Capital Management, Llc | 0.00% | 252,453 | $1,912,022 | $4,589,596 | +$2,677,574 | +140.04% | |
| Susquehanna International Group, Llp | 0.00% | 236,299 | $1,788,783 | $4,295,916 | +$2,507,133 | +140.16% | |
| Trexquant Investment Lp | 0.01% | 217,829 | $1,648,966 | $3,960,131 | +$2,311,165 | +140.16% | |
| Sei Investments Co | 0.00% | 166,632 | $1,261,404 | $3,029,370 | +$1,767,966 | +140.16% | |
| Informed Momentum Co Llc | 0.12% | 135,989 | $1,029,437 | $2,472,280 | +$1,442,843 | +140.16% | |
| Vanguard Fiduciary Trust Co | 0.00% | 128,759 | $974,706 | $2,340,839 | +$1,366,133 | +140.16% | |
| State Street Corp | 0.00% | 101,676 | $769,687 | $1,848,470 | +$1,078,783 | +140.16% | |
| Goldman Sachs Group Inc | 0.00% | 77,036 | $583,163 | $1,400,514 | +$817,351 | +140.16% | |
| Citigroup Inc | 0.00% | 75,688 | $572,958 | $1,376,008 | +$803,050 | +140.16% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 73,865 | $559,158 | $1,342,866 | +$783,708 | +140.16% | |
| Eddie Patel Inc | 0.39% | 67,059 | $507,638 | $1,219,133 | +$711,495 | +140.16% | |
| Oxford Asset Management Llp | 0.21% | 64,403 | $487,531 | $1,170,847 | +$683,316 | +140.16% | |
| 683 Capital Management, Llc | 0.04% | 60,000 | $454,200 | $1,090,800 | +$636,600 | +140.16% | |
| Squarepoint Ops Llc | 0.00% | 58,476 | $442,663 | $1,063,094 | +$620,431 | +140.16% | |
| Xtx Topco Ltd | 0.01% | 50,862 | $385,025 | $924,671 | +$539,646 | +140.16% | |
| Northern Trust Corp | 0.00% | 46,974 | $355,593 | $853,987 | +$498,394 | +140.16% | |
| Penbrook Management Llc | 0.27% | 46,740 | $353,821 | $849,733 | +$495,912 | +140.16% | |
| Brevan Howard Capital Management Lp | 0.00% | 43,171 | $326,804 | $784,849 | +$458,045 | +140.16% | |
| Stifel Financial Corp | 0.00% | 37,913 | $287,001 | $689,258 | +$402,257 | +140.16% | |
| Hudson Bay Capital Management Lp | 0.00% | 37,376 | $282,936 | $679,496 | +$396,560 | +140.16% | |
| Essex Investment Management Co Llc | 0.04% | 35,534 | $268,992 | $646,008 | +$377,016 | +140.16% | |
| Centiva Capital, Lp | 0.01% | 33,627 | $254,556 | $611,339 | +$356,783 | +140.16% | |
| Schonfeld Strategic Advisors Llc | 0.00% | 29,480 | $223,163 | $535,946 | +$312,783 | +140.16% | |
| Engineers Gate Manager Lp | 0.00% | 29,000 | $219,530 | $527,220 | +$307,690 | +140.16% | |
| Hillsdale Investment Management Inc. | 0.01% | 28,844 | $218,349 | $524,384 | +$306,035 | +140.16% | |
| Mangrove Partners Im, Llc | 0.01% | 23,889 | $180,840 | $434,302 | +$253,462 | +140.16% | |
| Bank Of America Corp | 0.00% | 23,239 | $175,919 | $422,485 | +$246,566 | +140.16% | |
| Apollon Wealth Management, Llc | 0.00% | 21,040 | $159,273 | $382,507 | +$223,234 | +140.16% | |
| Barclays Plc | 0.00% | 20,503 | $155,208 | $372,745 | +$217,537 | +140.16% | |
| Baker Tilly Wealth Management, Llc | 0.04% | 20,000 | $151,400 | $363,600 | +$212,200 | +140.16% | |
| Landscape Capital Management, L.L.C. | 0.01% | 17,269 | $130,726 | $313,950 | +$183,224 | +140.16% | |
| Occudo Quantitative Strategies Lp | 0.01% | 13,738 | $130,374 | $249,757 | +$119,383 | +91.57% | |
| Anfield Capital Management, Llc | 0.04% | 17,000 | $128,690 | $309,060 | +$180,370 | +140.16% | |
| Omers Administration Corp | 0.00% | 15,200 | $115,064 | $276,336 | +$161,272 | +140.16% | |
| Charles Schwab Investment Management Inc | 0.00% | 12,911 | $97,736 | $234,722 | +$136,986 | +140.16% | |
| Mcadam, Llc | 0.00% | 12,746 | $96,487 | $231,722 | +$135,235 | +140.16% | |
| Choreo, Llc | 0.00% | 11,306 | $85,589 | $205,543 | +$119,954 | +140.15% | |
| Imc-Chicago, Llc | 0.00% | 11,187 | $84,686 | $203,380 | +$118,694 | +140.16% | |
| Strait & Sound Wealth Management Llc | 0.03% | 11,044 | $83,603 | $200,780 | +$117,177 | +140.16% |
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.