ONE Stop Systems, Inc.: which funds bought and sold

Institutions that bought and sold ONE Stop Systems shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 77 institutions that filed 13F reports for both quarters added to or opened positions in ONE Stop Systems, and 42 cut or closed them. Together they added a net 2.6M shares, +31.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 273K shares (−13.9%); index fund managers were net buyers of 2.3M shares (+107.3%). 50 opened a new position and 18 sold out entirely.

Bought, Q2 2026 77 institutions, 50 of them new holders Sold, Q2 2026 42 institutions, 18 of them sold out

Net change, all compared +2.6M shares (+31.0%)

Net change, active managers −273K shares (−13.9%), 12 bought, 10 sold

Buyers versus sellers

institutions compared, 125

77 bought 6 42 sold

Active managers and hedge funds 12 bought · 10 sold · −273K

Index fund managers 9 bought · 0 sold · +2.3M

Other institutions 56 bought · 32 sold · +578K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+1.2M +207.7%	1.8M	$33.4M
Jane Street Group, LLC	+435K +49.7%	1.3M	$23.8M
Palisades Investment Partners, LLC	+414K New position	414K	$7.5M
Geode Capital Management, LLC Index funds	+320K +126.9%	573K	$10.4M
Qube Research & Technologies Ltd Hedge fund	+319K New position	319K	$5.8M
State Street Corp Index funds	+283K +277.9%	384K	$7M
Two Sigma Investments, LP Hedge fund	+162K New position	162K	$2.9M
Vanguard Portfolio Management LLC Index funds	+155K New position	155K	$2.8M
Cambridge Investment Research Advisors, Inc.	+153K +105.0%	299K	$5.4M
Renaissance Technologies LLC Hedge fund	+148K +56.9%	408K	$7.4M
New York State Common Retirement Fund	+147K New position	147K	$2.7M
Dimensional Fund Advisors LP	+147K New position	147K	$2.7M
Northern Trust Corp Index funds	+131K +279.1%	178K	$3.2M
Osaic Holdings, Inc.	+85K +5217.3%	87K	$1.6M
Squarepoint Ops LLC Hedge fund	+73K +124.6%	131K	$2.4M
Russell Investments Group, Ltd.	+67K New position	67K	$1.2M
Bank Of New York Mellon Corp	+62K New position	62K	$1.1M
Raymond James Financial Inc	+62K New position	62K	$1.1M
LPL Financial LLC	+54K New position	54K	$985,811
Charles Schwab Investment Management Inc Index funds	+52K +405.6%	65K	$1.2M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Qube Research & Technologies Ltd Hedge fund	+319K New position	319K	$5.8M
Two Sigma Investments, LP Hedge fund	+162K New position	162K	$2.9M
Renaissance Technologies LLC Hedge fund	+148K +56.9%	408K	$7.4M
Squarepoint Ops LLC Hedge fund	+73K +124.6%	131K	$2.4M
Calamos Advisors LLC Active manager	+32K New position	32K	$581,269
Acadian Asset Management LLC Active manager	+27K New position	27K	$495,000
Price T Rowe Associates Inc Active manager	+18K New position	18K	$336,000
Alliancebernstein L.P. Active manager	+17K New position	17K	$127,403
Engineers Gate Manager LP Hedge fund	+13K +43.9%	42K	$758,688
LMR Partners LLP Hedge fund	+13K New position	13K	$228,541

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	−419K Sold out	0	—
Morgan Stanley	−343K −79.4%	89K	$1.6M
UBS Group AG	−335K −82.3%	72K	$1.3M
Citadel Advisors LLC Hedge fund	−285K −80.0%	71K	$1.3M
Susquehanna International Group, LLP	−236K Sold out	0	—
DNB Asset Management As	−134K −53.0%	119K	$2.2M
Trexquant Investment LP Hedge fund	−119K −54.8%	98K	$1.8M
Sei Investments Co	−82K −49.4%	84K	$1.5M
HRT Financial LP	−79K Sold out	0	—
Thompson Siegel & Walmsley LLC	−65K −67.2%	32K	$578,000
Millennium Management LLC Hedge fund	−63K −15.7%	338K	$6.1M
Virtu Financial LLC	−61K Sold out	0	—
683 Capital Management, LLC Hedge fund	−60K Sold out	0	—
Xtx Topco Ltd	−51K Sold out	0	—
Hudson Bay Capital Management LP Hedge fund	−37K Sold out	0	—
Centiva Capital, LP Hedge fund	−34K Sold out	0	—
Brevan Howard Capital Management LP Hedge fund	−31K −71.8%	12K	$221,214
Schonfeld Strategic Advisors LLC Hedge fund	−29K Sold out	0	—
Hillsdale Investment Management Inc.	−29K Sold out	0	—
Mangrove Partners Im, LLC Hedge fund	−24K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	−419K Sold out	0	—
Citadel Advisors LLC Hedge fund	−285K −80.0%	71K	$1.3M
Trexquant Investment LP Hedge fund	−119K −54.8%	98K	$1.8M
Millennium Management LLC Hedge fund	−63K −15.7%	338K	$6.1M
683 Capital Management, LLC Hedge fund	−60K Sold out	0	—
Hudson Bay Capital Management LP Hedge fund	−37K Sold out	0	—
Centiva Capital, LP Hedge fund	−34K Sold out	0	—
Brevan Howard Capital Management LP Hedge fund	−31K −71.8%	12K	$221,214
Schonfeld Strategic Advisors LLC Hedge fund	−29K Sold out	0	—
Mangrove Partners Im, LLC Hedge fund	−24K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Palisades Investment Partners, LLC	414K	$7.5M
Qube Research & Technologies LtdHedge fund	319K	$5.8M
Two Sigma Investments, LPHedge fund	162K	$2.9M
Vanguard Portfolio Management LLCIndex funds	155K	$2.8M
New York State Common Retirement Fund	147K	$2.7M
Dimensional Fund Advisors LP	147K	$2.7M
Russell Investments Group, Ltd.	67K	$1.2M
Bank Of New York Mellon Corp	62K	$1.1M
Raymond James Financial Inc	62K	$1.1M
LPL Financial LLC	54K	$985,811

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Marshall Wace, LLPHedge fund	419K	$3.2M
Susquehanna International Group, LLP	236K	$1.8M
HRT Financial LP	79K	$598,000
Virtu Financial LLC	61K	$465,000
683 Capital Management, LLCHedge fund	60K	$454,200
Xtx Topco Ltd	51K	$385,025
Hudson Bay Capital Management LPHedge fund	37K	$282,936
Centiva Capital, LPHedge fund	34K	$254,556
Schonfeld Strategic Advisors LLCHedge fund	29K	$223,163
Hillsdale Investment Management Inc.	29K	$218,349

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 108
Ten largest holders: 65.5%
Index fund managers: 40.3%
Active managers and hedge funds: 15.7%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	12	10	8	6	−273K	−13.9%
Index fund managers	9	0	2	0	+2.3M	+107.3%
Other institutions	56	32	40	12	+578K	+13.8%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on ONE Stop Systems.

Only managers that filed a holdings report for both quarters are compared (125 here). 3 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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