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One Stop Systems
OSS

39 hedge funds and large institutions have $22.8M invested in One Stop Systems in 2025 Q2 according to their latest regulatory filings, with 10 funds opening new positions, 13 increasing their positions, 11 reducing their positions, and 4 closing their positions.

New
Increased
Maintained
Reduced
Closed

150% more first-time investments, than exits

New positions opened: 10 | Existing positions closed: 4

148% more call options, than puts

Call options by funds: $555K | Put options by funds: $224K

85% more capital invested

Capital invested by funds: $12.3M → $22.8M (+$10.5M)

18% more funds holding

Funds holding: 33 → 39 (+6)

18% more repeat investments, than reductions

Existing positions increased: 13 | Existing positions reduced: 11

3.6% more ownership

Funds ownership: 26.19% → 29.79% (+3.6%)

Holders
39
Holders Change
+6
Holders Change %
+18.18%
% of All Funds
0.51%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
10
Increased
13
Reduced
11
Closed
4
Calls
$555K
Puts
$224K
Net Calls
+$331K
Net Calls Change
+$389K

Top Buyers

Rank Fund Capital Flow
1
Marshall Wace
Marshall Wace
United Kingdom
+$1.22M
2
Jane Street
Jane Street
New York
+$703K
3
EI
EAM Investors
California
+$378K
4
Citadel Advisors
Citadel Advisors
Florida
+$343K
5
VF
Virtu Financial
New York
+$141K

Top Sellers

Rank Fund Capital Flow
1
BA
Bard Associates
Illinois
-$229K
2
LLL
Lynrock Lake LP
New York
-$48.2K
3
UBS Group
UBS Group
Switzerland
-$33K
4
GCP
GSA Capital Partners
United Kingdom
-$30K
5
PRCP
Pacific Ridge Capital Partners
Oregon
-$17.5K
Name Holding Trade Value Shares
Change 		Change in
Stake
Simplex Trading
26
Simplex Trading
Illinois
$48K -$10.4K -3,742 -22%
Charles Schwab
27
Charles Schwab
California
$45.8K – – –
Walleye Capital
28
Walleye Capital
New York
$45.6K +$35.9K +12,857 New
GIP
29
Granite Investment Partners
California
$39.3K +$30.9K +11,068 New
MG
30
Marex Group
$35.5K +$27.9K +10,000 New
UBS Group
31
UBS Group
Switzerland
$31K -$33K -11,811 -57%
Group One Trading
32
Group One Trading
Illinois
$29.6K -$5.2K -1,862 -18%
Bank of America
33
Bank of America
North Carolina
$17.8K +$13.6K +4,866 +3,223%
MCM
34
MAI Capital Management
Ohio
$5.12K – – –
TRCT
35
Tower Research Capital (TRC)
New York
$4.06K -$1.69K -605 -35%
Wells Fargo
36
Wells Fargo
California
$3.55K – – –
Osaic Holdings
37
Osaic Holdings
Arizona
$1.77K +$1.4K +500 New
Citigroup
38
Citigroup
New York
$1.17K +$921 +330 New
SS
39
SBI Securities
Japan
$714 -$279 -100 -33%
GCP
40
GSA Capital Partners
United Kingdom
– -$30K -13,127 Closed
JP Morgan Chase
41
JP Morgan Chase
New York
– -$8.64K -3,723 Closed
Lazard Asset Management
42
Lazard Asset Management
New York
– -$1K -845 Closed
OP
43
ORG Partners
Indiana
– -$279 -120 Closed
1
2

OSS Hedge Fund Activity: Q2 2025 in Review

39 of the 7,598 institutional investors tracked by Wall St. Rank reported a position in One Stop Systems (OSS) for Q2 2025, worth a combined $22.8M — up 85% from $12.3M a quarter earlier.

Buyers outnumbered sellers: 10 funds opened new OSS positions and 4 closed out — a net gain of 6 holders — while 13 added to existing stakes and 11 trimmed.

The largest buyer was Marshall Wace, adding an estimated $1.22M. The largest seller was Bard Associates, cutting an estimated $229K.

  • 39 institutional investors held One Stop Systems (OSS) as of Q2 2025, up from 33 in Q1 2025.
  • Funds reported $22.8M of One Stop Systems stock for Q2 2025, up 85% quarter-over-quarter.
  • 10 funds opened new One Stop Systems positions in Q2 2025 and 4 closed out, a net change of +6 holders.
  • The largest One Stop Systems buyer in Q2 2025 was Marshall Wace, an estimated $1.22M added.
  • The largest One Stop Systems seller in Q2 2025 was Bard Associates, an estimated $229K sold.

Based on aggregated 13F filings for Q2 2025.