Quantumsphere Acquisition Corp Units
QUMSU
8 hedge funds and large institutions have $2.94M invested in Quantumsphere Acquisition Corp Units in 2026 Q1 according to their latest regulatory filings, with 1 funds opening new positions, 2 increasing their positions, 1 reducing their positions, and 2 closing their positions.
100% more repeat investments, than reductions
Existing positions increased: 2 | Existing positions reduced: 1
7.17% less ownership
Funds ownership: 9.7% → 2.53% (-7.2%)
11% less funds holding
Funds holding: 9 → 8 (-1)
50% less first-time investments, than exits
New positions opened: 1 | Existing positions closed: 2
74% less capital invested
Capital invested by funds: $11.3M → $2.94M (-$8.31M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CS
Clear Street
New York
|
+$77.5K |
| 2 |
GCL
Glazer Capital LLC
New York
|
+$2.23K |
| 3 |
UBS Group
Zurich,
Switzerland
|
+$51 |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RCM
Rivernorth Capital Management
West Palm Beach,
Florida
|
-$4.32M |
| 2 |
PAMP
Polar Asset Management Partners
Toronto,
Ontario, Canada
|
-$4.07M |
| 3 |
HF
HRT Financial
New York
|
-$9.71K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
WCMNY
1
Westchester Capital Management (New York)
Valhalla,
New York
| $1.01M | – | – | – |
|
|
GCIA
2
Gabelli & Co Investment Advisers
Rye,
New York
| $699K | – | – | – |
|
|
GF
3
Gabelli Funds
Rye,
New York
| $591K | – | – | – |
|
|
HF
4
HRT Financial
New York
| $304K | -$9.71K | -951 | -3% |
|
|
CS
5
Clear Street
New York
| $232K | +$77.5K | +7,594 | +51% |
|
6
JP Morgan Chase
New York
| $102K | – | – | – |
|
|
7
UBS Group
Zurich,
Switzerland
| $4.69K | +$51 | +5 | +1% |
|
|
GCL
8
Glazer Capital LLC
New York
| $2K | +$2.23K | +219 | New |
|
|
RCM
9
Rivernorth Capital Management
West Palm Beach,
Florida
| – | -$4.32M | -424,512 | Closed |
|
|
PAMP
10
Polar Asset Management Partners
Toronto,
Ontario, Canada
| – | -$4.07M | -400,000 | Closed |
|
QUMSU Hedge Fund Activity: Q1 2026 in Review
8 of the 8,131 institutional investors tracked by Wall St. Rank reported a position in Quantumsphere Acquisition Corp Units (QUMSU) for Q1 2026, worth a combined $2.94M — down 74% from $11.3M a quarter earlier.
Sellers outnumbered buyers: 2 funds closed out of QUMSU and 1 opened new positions — a net loss of 1 holder — while 1 trimmed existing stakes and 2 added.
The largest buyer was Clear Street, adding an estimated $77.5K. The largest seller was Rivernorth Capital Management, exiting entirely with an estimated $4.32M sold.
- 8 institutional investors held Quantumsphere Acquisition Corp Units (QUMSU) as of Q1 2026, down from 9 in Q4 2025.
- Funds reported $2.94M of Quantumsphere Acquisition Corp Units stock for Q1 2026, down 74% quarter-over-quarter.
- 1 fund opened new Quantumsphere Acquisition Corp Units positions in Q1 2026 and 2 closed out, a net change of -1 holder.
- The largest Quantumsphere Acquisition Corp Units buyer in Q1 2026 was Clear Street, an estimated $77.5K added.
- The largest Quantumsphere Acquisition Corp Units seller in Q1 2026 was Rivernorth Capital Management, an estimated $4.32M sold.
Based on aggregated 13F filings for Q1 2026.