ZeroStack Corp
ZSTK
8 hedge funds and large institutions have $8K invested in ZeroStack Corp in 2025 Q4 according to their latest regulatory filings, with 0 funds opening new positions, 2 increasing their positions, 3 reducing their positions, and 3 closing their positions.
0.99% less ownership
Funds ownership: 1.16% → 0.17% (-0.99%)
33% less funds holding
Funds holding: 12 → 8 (-4)
33% less repeat investments, than reductions
Existing positions increased: 2 | Existing positions reduced: 3
93% less capital invested
Capital invested by funds: $109K → $8K (-$101K)
100% less first-time investments, than exits
New positions opened: 0 | Existing positions closed: 3
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
TRCT
Tower Research Capital (TRC)
New York
|
+$6.43K |
| 2 |
Bank of America
Charlotte,
North Carolina
|
+$22 |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
UBS Group
Zurich,
Switzerland
|
-$59.4K |
| 2 |
Osaic Holdings
Scottsdale,
Arizona
|
-$4.26K |
| 3 |
Citigroup
New York
|
-$2.42K |
| 4 |
Morgan Stanley
New York
|
-$1.41K |
| 5 |
Wells Fargo
San Francisco,
California
|
-$17 |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
TRCT
1
Tower Research Capital (TRC)
New York
| $5.3K | +$6.43K | +579 | +216% |
|
|
2
UBS Group
Zurich,
Switzerland
| $1.42K | -$59.4K | -5,349 | -96% |
|
|
3
Morgan Stanley
New York
| $1.09K | -$1.41K | -127 | -42% |
|
|
BWM
4
Bernard Wealth Management
Royal Oak,
Michigan
| $76 | – | – | – |
|
|
5
Osaic Holdings
Scottsdale,
Arizona
| $63 | -$4.26K | -384 | -97% |
|
|
6
Bank of America
Charlotte,
North Carolina
| $43 | +$22 | +2 | +40% |
|
|
KFI
7
Key Financial Inc
West Chester,
Pennsylvania
| $6 | – | – | – |
|
|
8
Citigroup
New York
| – | -$2.42K | -140 | Closed |
|
9
BlackRock
New York
| – | -$13 | -1 | Closed |
|
|
10
Wells Fargo
San Francisco,
California
| – | -$17 | -1 | Closed |
|
ZSTK Hedge Fund Activity: Q4 2025 in Review
8 of the 8,228 institutional investors tracked by Wall St. Rank reported a position in ZeroStack Corp (ZSTK) for Q4 2025, worth a combined $8K — down 93% from $109K a quarter earlier.
Sellers outnumbered buyers: 3 funds closed out of ZSTK and 0 opened new positions — a net loss of 3 holders — while 3 trimmed existing stakes and 2 added.
The largest buyer was Tower Research Capital (TRC), adding an estimated $6.43K. The largest seller was UBS Group, cutting an estimated $59.4K.
- 8 institutional investors held ZeroStack Corp (ZSTK) as of Q4 2025, down from 12 in Q3 2025.
- Funds reported $8K of ZeroStack Corp stock for Q4 2025, down 93% quarter-over-quarter.
- 0 funds opened new ZeroStack Corp positions in Q4 2025 and 3 closed out, a net change of -3 holders.
- The largest ZeroStack Corp buyer in Q4 2025 was Tower Research Capital (TRC), an estimated $6.43K added.
- The largest ZeroStack Corp seller in Q4 2025 was UBS Group, an estimated $59.4K sold.
Based on aggregated 13F filings for Q4 2025.