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ZSTK

ZeroStack Corp
ZSTK

12 hedge funds and large institutions have $109K invested in ZeroStack Corp in 2025 Q3 according to their latest regulatory filings, with 2 funds opening new positions, 2 increasing their positions, 6 reducing their positions, and 13 closing their positions.

New
Increased
Maintained
Reduced
Closed

1.09% more ownership

Funds ownership: 0.06% → 1.16% (+1.1%)

48% less funds holding

Funds holding: 23 → 12 (-11)

67% less repeat investments, than reductions

Existing positions increased: 2 | Existing positions reduced: 6

67% less capital invested

Capital invested by funds: $330K → $109K (-$221K)

85% less first-time investments, than exits

New positions opened: 2 | Existing positions closed: 13

Holders
12
Holders Change
-11
Holders Change %
-47.83%
% of All Funds
0.16%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
2
Increased
2
Reduced
6
Closed
13
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
UBS Group
UBS Group
Switzerland
+$123K
2
Osaic Holdings
Osaic Holdings
Arizona
+$8.87K
3
TRCT
Tower Research Capital (TRC)
New York
+$6.19K
4
Citigroup
Citigroup
New York
+$3.23K

Top Sellers

Rank Fund Capital Flow
1
Geode Capital Management
Geode Capital Management
Massachusetts
-$97.8K
2
Vanguard Group
Vanguard Group
Pennsylvania
-$51.5K
3
Renaissance Technologies
Renaissance Technologies
New York
-$46.2K
4
AI
AdvisorShares Investments
Maryland
-$41.2K
5
XT
XTX Topco
Cayman Islands
-$23.4K
Name Holding Trade Value Shares
Change 		Change in
Stake
UBS Group
1
UBS Group
Switzerland
$96.3K +$123K +5,325 +2,122%
Morgan Stanley
2
Morgan Stanley
New York
$5.2K -$23 -1 -0.3%
TRCT
3
Tower Research Capital (TRC)
New York
$4.63K +$6.19K +268 New
Citigroup
4
Citigroup
New York
$2.42K +$3.23K +140 New
Osaic Holdings
5
Osaic Holdings
Arizona
$386 +$8.87K +384 +3,840%
BWM
6
Bernard Wealth Management
Michigan
$208 -$23 -1 -8%
Bank of America
7
Bank of America
North Carolina
$86 -$23 -1 -17%
KFI
8
Key Financial Inc
Pennsylvania
$18 -$23 -1 -50%
Wells Fargo
9
Wells Fargo
California
$17 -$23 -1 -50%
CAM
10
Creekmur Asset Management
Illinois
$17 – – –
BlackRock
11
BlackRock
New York
$13 – – –
Geode Capital Management
12
Geode Capital Management
Massachusetts
– -$97.8K -4,322 Closed
Vanguard Group
13
Vanguard Group
Pennsylvania
– -$51.5K -2,276 Closed
Renaissance Technologies
14
Renaissance Technologies
New York
– -$46.2K -2,041 Closed
AI
15
AdvisorShares Investments
Maryland
– -$41.2K -1,819 Closed
XT
16
XTX Topco
Cayman Islands
– -$23.4K -1,033 Closed
State Street
17
State Street
Massachusetts
– -$21.2K -938 Closed
HF
18
HRT Financial
New York
– -$10K -482 Closed
Susquehanna International Group
19
Susquehanna International Group
Pennsylvania
– -$10.3K -456 Closed
Northern Trust
20
Northern Trust
Illinois
– -$9.52K -421 Closed
Royal Bank of Canada
21
Royal Bank of Canada
Ontario, Canada
– -$3.12K -135 -92%
TWC
22
TD Waterhouse Canada
Ontario, Canada
– -$2.82K -123 Closed
SIS
23
Sound Income Strategies
Florida
– -$290 -13 Closed
FFA
24
Farther Finance Advisors
California
– -$32 -1 Closed
IA
25
IFP Advisors
Florida
– -$12 -1 Closed
1
2

ZSTK Hedge Fund Activity: Q3 2025 in Review

12 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in ZeroStack Corp (ZSTK) for Q3 2025, worth a combined $109K — down 67% from $330K a quarter earlier.

Sellers outnumbered buyers: 13 funds closed out of ZSTK and 2 opened new positions — a net loss of 11 holders — while 6 trimmed existing stakes and 2 added.

The largest buyer was UBS Group, adding an estimated $123K. The largest seller was Geode Capital Management, exiting entirely with an estimated $97.8K sold.

  • 12 institutional investors held ZeroStack Corp (ZSTK) as of Q3 2025, down from 23 in Q2 2025.
  • Funds reported $109K of ZeroStack Corp stock for Q3 2025, down 67% quarter-over-quarter.
  • 2 funds opened new ZeroStack Corp positions in Q3 2025 and 13 closed out, a net change of -11 holders.
  • The largest ZeroStack Corp buyer in Q3 2025 was UBS Group, an estimated $123K added.
  • The largest ZeroStack Corp seller in Q3 2025 was Geode Capital Management, an estimated $97.8K sold.

Based on aggregated 13F filings for Q3 2025.