Quantumsphere Acquisition Corp Units
QUMSU
9 hedge funds and large institutions have $11.3M invested in Quantumsphere Acquisition Corp Units in 2025 Q4 according to their latest regulatory filings, with 1 funds opening new positions, 1 increasing their positions, 2 reducing their positions, and 21 closing their positions.
39.38% less ownership
Funds ownership: 49.08% → 9.7% (-39%)
50% less repeat investments, than reductions
Existing positions increased: 1 | Existing positions reduced: 2
70% less funds holding
Funds holding: 30 → 9 (-21)
80% less capital invested
Capital invested by funds: $56.7M → $11.3M (-$45.5M)
95% less first-time investments, than exits
New positions opened: 1 | Existing positions closed: 21
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HF
HRT Financial
New York
|
+$11.2K |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$4.68K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GCL
Glazer Capital LLC
New York
|
-$4.26M |
| 2 |
HCI
Harraden Circle Investments
New York
|
-$4.06M |
| 3 |
LA
Linden Advisors
New York
|
-$4.05M |
| 4 |
Toronto Dominion Bank
Toronto, Ontario,
Ontario, Canada
|
-$3.66M |
| 5 |
AA
AQR Arbitrage
Greenwich,
Connecticut
|
-$3.27M |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
26
BNP Paribas Financial Markets
Paris,
France
| – | -$1.04M | -102,340 | Closed |
|
|
BFM
27
Boothbay Fund Management
New York
| – | -$1.01M | -100,000 | Closed |
|
|
SSA
28
Schonfeld Strategic Advisors
New York
| – | -$886K | -87,486 | Closed |
|
|
WAM
29
Warberg Asset Management
Winnetka,
Illinois
| – | -$420K | -41,421 | Closed |
|
|
TI
30
TrueMark Investments
Chicago,
Illinois
| – | -$101K | -10,000 | Closed |
|
QUMSU Hedge Fund Activity: Q4 2025 in Review
9 of the 8,226 institutional investors tracked by Wall St. Rank reported a position in Quantumsphere Acquisition Corp Units (QUMSU) for Q4 2025, worth a combined $11.3M — down 80% from $56.7M a quarter earlier.
Sellers outnumbered buyers: 21 funds closed out of QUMSU and 1 opened new positions — a net loss of 20 holders — while 2 trimmed existing stakes and 1 added.
The largest buyer was HRT Financial, adding an estimated $11.2K. The largest seller was Glazer Capital LLC, exiting entirely with an estimated $4.26M sold.
- 9 institutional investors held Quantumsphere Acquisition Corp Units (QUMSU) as of Q4 2025, down from 30 in Q3 2025.
- Funds reported $11.3M of Quantumsphere Acquisition Corp Units stock for Q4 2025, down 80% quarter-over-quarter.
- 1 fund opened new Quantumsphere Acquisition Corp Units positions in Q4 2025 and 21 closed out, a net change of -20 holders.
- The largest Quantumsphere Acquisition Corp Units buyer in Q4 2025 was HRT Financial, an estimated $11.2K added.
- The largest Quantumsphere Acquisition Corp Units seller in Q4 2025 was Glazer Capital LLC, an estimated $4.26M sold.
Based on aggregated 13F filings for Q4 2025.