Ownership

Who owns ONE STOP SYSTEMS, INC., from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).

Stakes over 5%

Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.

Galkin Vladimir, Galkin Angelica, Angelica Galkin Revocable Trust, dated April 21, 2018 July 31, 2026

Galkin Vladimir: 6.1% · 1,500,000 shares — Galkin Angelica: 6.1% · 1,500,000 shares — Angelica Galkin Revocable Trust, dated April 21, 2018: 5.2% · 1,300,000 shares

View filing (SCHEDULE 13G/A) Amendment #1

BlackRock, Inc. July 29, 2026

BlackRock, Inc.: 7.4% · 1,833,734 shares

View filing (SCHEDULE 13G)

5 more 5% stakes behind a free account

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Super investors holding OSS

Every institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of ONE STOP SYSTEMS, INC. they hold. Together these 140 managers report 58.75% of shares outstanding.

Investor	Position value	Shares	% of their portfolio	% of company	As of
BlackRock, Inc.	$33.4M	1,837,840	0.00%	7.37%	June 30, 2026
JANE STREET GROUP, LLC	$23.8M	1,309,455	0.00%	5.25%	June 30, 2026

138 more institutional holders behind a free account

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Funds holding OSS

Funds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 44 funds hold 5.78% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.

Fund	Position value	% of net assets	% of company	As of
VANGUARD TOTAL STOCK MARKET INDEX FUND	$12.6M	0.00%	2.78%	June 30, 2026
VANGUARD EXTENDED MARKET INDEX FUND	$4.68M	0.00%	1.03%	June 30, 2026

42 more funds behind a free account

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