Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

ONE STOP SYSTEMS, INC.

CIK 0001394056OSS· quarter ending 2026-06-30

Shares outstanding

24,940,130

as of 2026-06-30 · 10-Q cover page, filed 2026-08-05

Held by 13F filers

10,814,076

43.4% of shares outstanding

Holders

108

+31 vs 2026-03-31 · 51 new, 20 exited

Value

$196.3M

shares +29.8% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-05, as of 2026-06-30)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	OSS · NASDAQ	24,940,130	10,814,076	43.4%	108	68247W109

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	68247W109	COM	108	10,814,076	24,940,130	43.4%	$196.3M	5 call / 5 put	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (108 of 108 · 68247W109)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	BlackRock, Inc.	1,837,840	7.37%	$33.4M	+1,240,537 (+207.7%)
2	JANE STREET GROUP, LLC	1,309,455	5.25%	$23.8M	+434,897 (+49.7%)
3	VANGUARD CAPITAL MANAGEMENT LLC	974,568	3.91%	$17.7M	+14,980 (+1.6%)
4	GEODE CAPITAL MANAGEMENT, LLC	572,918	2.30%	$10.4M	+320,465 (+126.9%)
5	BARD ASSOCIATES INC	526,370	2.11%	$9.6M	-14,296 (-2.6%)
6	Palisades Investment Partners, LLC	414,392	1.66%	$7.5M	NEW
7	RENAISSANCE TECHNOLOGIES LLC	407,860	1.64%	$7.4M	+147,900 (+56.9%)
8	STATE STREET CORP	384,259	1.54%	$7.0M	+282,583 (+277.9%)
9	MILLENNIUM MANAGEMENT LLC	337,710	1.35%	$6.1M	-63,019 (-15.7%)
10	Qube Research & Technologies Ltd	318,919	1.28%	$5.8M	NEW
11	Cambridge Investment Research Advisors, Inc.	298,584	1.20%	$5.4M	+152,960 (+105.0%)
12	NORTHERN TRUST CORP	178,101	0.71%	$3.2M	+131,127 (+279.1%)
13	TWO SIGMA INVESTMENTS, LP	162,193	0.65%	$2.9M	NEW
14	VANGUARD FIDUCIARY TRUST CO	157,365	0.63%	$2.9M	+28,606 (+22.2%)
15	VANGUARD PORTFOLIO MANAGEMENT LLC	155,408	0.62%	$2.8M	NEW
16	NEW YORK STATE COMMON RETIREMENT FUND	147,343	0.59%	$2.7M	NEW
17	DIMENSIONAL FUND ADVISORS LP	146,871	0.59%	$2.7M	NEW
18	Squarepoint Ops LLC	131,346	0.53%	$2.4M	+72,870 (+124.6%)
19	Informed Momentum Co LLC	130,568	0.52%	$2.4M	-5,421 (-4.0%)
20	DNB Asset Management AS	118,759	0.48%	$2.2M	-133,974 (-53.0%)
21	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	99,272	0.40%	$1.8M	+25,407 (+34.4%)
22	Trexquant Investment LP	98,442	0.39%	$1.8M	-119,387 (-54.8%)
23	MORGAN STANLEY	88,902	0.36%	$1.6M	-343,017 (-79.4%)
24	OSAIC HOLDINGS, INC.	86,513	0.35%	$1.6M	+84,886 (+5217.3%)
25	SEI INVESTMENTS CO	84,393	0.34%	$1.5M	-82,239 (-49.4%)
26	GOLDMAN SACHS GROUP INC	75,306	0.30%	$1.4M	-1,730 (-2.2%)
27	Eddie Patel Inc	72,895	0.29%	$1.3M	+5,836 (+8.7%)
28	UBS Group AG	72,184	0.29%	$1.3M	-334,830 (-82.3%)
29	CITADEL ADVISORS LLC	71,202	0.29%	$1.3M	-285,474 (-80.0%)
30	Russell Investments Group, Ltd.	66,596	0.27%	$1.2M	NEW
31	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	65,276	0.26%	$1.2M	+52,365 (+405.6%)
32	Bank of New York Mellon Corp	62,473	0.25%	$1.1M	NEW
33	RAYMOND JAMES FINANCIAL INC	61,924	0.25%	$1.1M	NEW
34	CITIGROUP INC	54,956	0.22%	$999K	-20,732 (-27.4%)
35	LPL Financial LLC	54,225	0.22%	$986K	NEW
36	SG Americas Securities, LLC	47,014	0.19%	$855K	+18,992 (+67.8%)
37	Engineers Gate Manager LP	41,732	0.17%	$759K	+12,732 (+43.9%)
38	Penbrook Management LLC	38,875	0.16%	$707K	-7,865 (-16.8%)
39	Polymer Capital Management (HK) LTD	38,000	0.15%	$691K	NEW
40	Inspire Investing, LLC	37,967	0.15%	$690K	NEW
41	Nuveen, LLC	36,308	0.15%	$660K	NEW
42	STIFEL FINANCIAL CORP	32,920	0.13%	$598K	-4,993 (-13.2%)
43	BANK OF AMERICA CORP /DE/	32,151	0.13%	$585K	+8,912 (+38.3%)
44	Calamos Advisors LLC	31,973	0.13%	$581K	NEW
45	THOMPSON SIEGEL & WALMSLEY LLC	31,788	0.13%	$578K	-65,175 (-67.2%)
46	Optimus Capital Advisors, LLC	30,000	0.12%	$545K	NEW
47	RHUMBLINE ADVISERS	27,871	0.11%	$507K	NEW
48	ACADIAN ASSET MANAGEMENT LLC	27,282	0.11%	$495K	NEW
49	WELLS FARGO & COMPANY/MN	26,784	0.11%	$487K	+25,784 (+2578.4%)
50	CANTOR FITZGERALD, L. P.	26,098	0.10%	$474K	NEW
51	ESSEX INVESTMENT MANAGEMENT CO LLC	25,674	0.10%	$467K	-9,860 (-27.7%)
52	DEUTSCHE BANK AG\	22,348	0.09%	$406K	NEW
53	FOX RUN MANAGEMENT, L.L.C.	22,208	0.09%	$404K	NEW
54	BAKER TILLY WEALTH MANAGEMENT, LLC	20,000	0.08%	$364K	—
55	Lodestone Wealth Management LLC	19,637	0.08%	$357K	+12,834 (+188.7%)
56	PRICE T ROWE ASSOCIATES INC /MD/	18,450	0.07%	$336K	NEW
57	OCCUDO QUANTITATIVE STRATEGIES LP	18,117	0.07%	$329K	+4,379 (+31.9%)
58	Caitong International Asset Management Co., Ltd	17,337	0.07%	$315K	+13,705 (+377.3%)
59	ALLIANCEBERNSTEIN L.P.	16,830	0.07%	$127K	NEW
60	Apollon Wealth Management, LLC	16,195	0.06%	$294K	-4,845 (-23.0%)
61	Savant Capital, LLC	16,000	0.06%	$206K	NEW
62	State of Wyoming	15,423	0.06%	$280K	NEW
63	BARCLAYS PLC	14,679	0.06%	$267K	-5,824 (-28.4%)
64	Clear Street Group Inc.	14,250	0.06%	$259K	NEW
65	Cornerstone Investment Partners, LLC	14,218	0.06%	$258K	NEW
66	Marex Group Ltd	13,700	0.05%	$249K	NEW
67	MetLife Investment Management, LLC	13,347	0.05%	$243K	NEW
68	LMR Partners LLP	12,571	0.05%	$229K	NEW
69	Invesco Ltd.	12,209	0.05%	$222K	NEW
70	McAdam, LLC	12,198	0.05%	$222K	-548 (-4.3%)
71	Brevan Howard Capital Management LP	12,168	0.05%	$221K	-31,003 (-71.8%)
72	Total Clarity Wealth Management, Inc.	11,494	0.05%	$209K	NEW
73	Spark Investment Management LLC	11,400	0.05%	$207K	NEW
74	CHOREO, LLC	11,306	0.05%	$206K	—
75	Connective Capital Management, LLC	11,198	0.04%	$204K	NEW
76	HighTower Advisors, LLC	10,365	0.04%	$188K	NEW
77	Strait & Sound Wealth Management LLC	10,000	0.04%	$182K	-1,044 (-9.5%)
78	JPMORGAN CHASE & CO	9,315	0.04%	$154K	NEW
79	Vanguard Global Advisers, LLC	7,884	0.03%	$143K	-2,935 (-27.1%)
80	Police & Firemen's Retirement System of New Jersey	6,627	0.03%	$120K	NEW
81	Quantbot Technologies LP	6,082	0.02%	$111K	NEW
82	STRS OHIO	4,400	0.02%	$80K	NEW
83	Smartleaf Asset Management LLC	4,000	0.02%	$66K	—
84	Global Retirement Partners, LLC	4,000	0.02%	$73K	NEW
85	BNP PARIBAS FINANCIAL MARKETS	3,899	0.02%	$71K	+1,903 (+95.3%)
86	NATIONAL BANK OF CANADA /FI/	3,500	0.01%	$64K	NEW
87	NewEdge Advisors, LLC	2,500	0.01%	$45K	-520 (-17.2%)
88	Legal & General Group Plc	2,172	0.01%	$39K	NEW
89	Ameritas Investment Partners, Inc.	2,039	0.01%	$37K	NEW
90	Farther Finance Advisors, LLC	1,500	0.01%	$27K	NEW
91	JONES FINANCIAL COMPANIES LLLP	1,465	0.01%	$24K	+1,291 (+742.0%)
92	SBI Securities Co., Ltd.	1,372	0.01%	$25K	+1,358 (+9700.0%)
93	Tower Research Capital LLC (TRC)	1,340	0.01%	$24K	-3,414 (-71.8%)
94	ROYAL BANK OF CANADA	1,315	0.01%	$24K	+763 (+138.2%)
95	FMR LLC	996	0.00%	$18K	+940 (+1678.6%)
96	Lynrock Lake LP	666	0.00%	$12K	—
97	Hurley Capital, LLC	622	0.00%	$11K	—
98	Founders Capital Management	600	0.00%	$11K	NEW
99	Steward Partners Investment Advisory, LLC	594	0.00%	$11K	+394 (+197.0%)
100	Arax Advisory Partners	546	0.00%	$10K	-1,925 (-77.9%)
101	NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	481	0.00%	$9K	NEW
102	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	309	0.00%	$6K	NEW
103	Strive Financial Group ,LLC	100	0.00%	$2K	—
104	Parallel Advisors, LLC	100	0.00%	$2K	NEW
105	Sterling Capital Management LLC	79	0.00%	$1K	NEW
106	Quarry LP	60	0.00%	$1K	NEW
107	SHP Wealth Management	25	0.00%	$455	NEW
108	Essential Investment Partners LLC	15	0.00%	$273	NEW

Exited since 2026-03-31 (20 filers; largest 20 shown)

MARSHALL WACE, LLP	−418,978
SUSQUEHANNA INTERNATIONAL GROUP, LLP	−236,299
HRT FINANCIAL LP	−79,005
OXFORD ASSET MANAGEMENT LLP	−64,403
Virtu Financial LLC	−61,458
683 Capital Management, LLC	−60,000
XTX Topco Ltd	−50,862
Hudson Bay Capital Management LP	−37,376
Centiva Capital, LP	−33,627
Schonfeld Strategic Advisors LLC	−29,480
Hillsdale Investment Management Inc.	−28,844
MANGROVE PARTNERS IM, LLC	−23,889
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.	−17,269
Anfield Capital Management, LLC	−17,000
OMERS ADMINISTRATION Corp	−15,200
IMC-Chicago, LLC	−11,187
NKCFO LLC	−10,000
Advisory Services Network, LLC	−2,341
MAI Capital Management	−226
Root Financial Partners, LLC	−65

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Angelica Galkin Revocable Trust, dated April 21, 2018	SCHEDULE 13G/A	2026-07-31	2026-07-31	1,300,000	5.2%
Galkin Angelica	SCHEDULE 13G/A	2026-07-31	2026-07-31	1,500,000	6.1%
Galkin Vladimir	SCHEDULE 13G/A	2026-07-31	2026-07-31	1,500,000	6.1%
BlackRock, Inc.	SCHEDULE 13G	2026-07-29	2026-06-30	1,833,734	7.4%
Jane Street Global Trading, LLC	SCHEDULE 13G	2026-05-13	2026-05-07	258,706	1%
JANE STREET GROUP, LLC	SCHEDULE 13G	2026-05-13	2026-05-07	1,388,714	5.6%
Jane Street Capital, LLC	SCHEDULE 13G	2026-05-13	2026-05-07	1,130,008	4.6%
Paul Cynthia	SCHEDULE 13G/A	2026-02-17	2025-12-31	665,918	2.7%
LYNROCK LAKE PARTNERS LLC	SCHEDULE 13G/A	2026-02-17	2025-12-31	665,918	2.7%
Lynrock Lake LP	SCHEDULE 13G/A	2026-02-17	2025-12-31	665,918	2.7%
BARD ASSOCIATES INC	SCHEDULE 13G/A	2026-02-13	2025-11-07	540,100	2.2%
Cynthia Paul	SCHEDULE 13G/A	2025-11-18	2025-09-30	1,443,687	6.6%
Horton Capital Partners, LLC	SCHEDULE 13D/A	2025-06-06	2025-06-04	917,343	4.2%
Horton Capital Partners Fund, LP	SCHEDULE 13D/A	2025-06-06	2025-06-04	917,343	4.2%
Horton Capital Management, LLC	SCHEDULE 13D/A	2025-06-06	2025-06-04	917,343	4.2%
Manko Joseph M. Jr.	SCHEDULE 13D/A	2025-06-06	2025-06-04	938,343	4.3%
Barclays PLC	SCHEDULE 13G/A	2025-05-13	2025-03-31	—	—
Ramya Rao	SCHEDULE 13G	2025-02-14	2024-12-31	1,087,112	5.15%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.