Quantumsphere Acquisition Corp Rights
QUMSR
5 hedge funds and large institutions have $230K invested in Quantumsphere Acquisition Corp Rights in 2025 Q3 according to their latest regulatory filings, with 5 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HCM
Highbridge Capital Management
New York
|
+$133K |
| 2 |
MSU
Mizuho Securities USA
New York
|
+$68K |
| 3 |
Hudson Bay Capital Management
Stamford,
Connecticut
|
+$44.6K |
| 4 |
HCI
Harraden Circle Investments
New York
|
+$31.8K |
| 5 |
Toronto Dominion Bank
Toronto, Ontario,
Ontario, Canada
|
+$9.5K |
Top Sellers
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
HCM
1
Highbridge Capital Management
New York
| $133K | +$133K | +700,000 | New |
|
|
2
Hudson Bay Capital Management
Stamford,
Connecticut
| $44.6K | +$44.6K | +235,000 | New |
|
|
HCI
3
Harraden Circle Investments
New York
| $31.8K | +$31.8K | +167,500 | New |
|
|
4
Toronto Dominion Bank
Toronto, Ontario,
Ontario, Canada
| $14.5K | +$9.5K | +50,000 | New |
|
|
MSU
5
Mizuho Securities USA
New York
| $6.14K | +$68K | +357,801 | New |
|
QUMSR Hedge Fund Activity: Q3 2025 in Review
5 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Quantumsphere Acquisition Corp Rights (QUMSR) for Q3 2025, worth a combined $230K.
Buyers outnumbered sellers: 5 funds opened new QUMSR positions and 0 closed out — a net gain of 5 holders — while 0 added to existing stakes and 0 trimmed.
The largest buyer was Highbridge Capital Management, opening a new position worth an estimated $133K.
- 5 institutional investors held Quantumsphere Acquisition Corp Rights (QUMSR) as of Q3 2025, up from 0 in Q2 2025.
- Funds reported $230K of Quantumsphere Acquisition Corp Rights stock for Q3 2025.
- 5 funds opened new Quantumsphere Acquisition Corp Rights positions in Q3 2025 and 0 closed out, a net change of +5 holders.
- The largest Quantumsphere Acquisition Corp Rights buyer in Q3 2025 was Highbridge Capital Management, an estimated $133K added.
Based on aggregated 13F filings for Q3 2025.