Quantumsphere Acquisition Corp
QUMS
29 hedge funds and large institutions have $76.4M invested in Quantumsphere Acquisition Corp in 2026 Q1 according to their latest regulatory filings, with 5 funds opening new positions, 6 increasing their positions, 7 reducing their positions, and 1 closing their positions.
400% more first-time investments, than exits
New positions opened: 5 | Existing positions closed: 1
16% more capital invested
Capital invested by funds: $65.7M → $76.4M (+$10.7M)
16% more funds holding
Funds holding: 25 → 29 (+4)
8.65% more ownership
Funds ownership: 57.59% → 66.24% (+8.7%)
14% less repeat investments, than reductions
Existing positions increased: 6 | Existing positions reduced: 7
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RCM
Rivernorth Capital Management
West Palm Beach,
Florida
|
+$4.28M |
| 2 |
PAMP
Polar Asset Management Partners
Toronto,
Ontario, Canada
|
+$4.03M |
| 3 |
WRBC
W.R. Berkley Corp
Greenwich,
Connecticut
|
+$2.07M |
| 4 |
HCM
Highbridge Capital Management
New York
|
+$1.22M |
| 5 |
CA
Crossingbridge Advisors
Pleasantville,
New York
|
+$1.09M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CS
Clear Street
New York
|
-$2.52M |
| 2 |
Two Sigma Investments
New York
|
-$1.84M |
| 3 |
WAM
Warberg Asset Management
Winnetka,
Illinois
|
-$415K |
| 4 |
PC
Periscope Capital
Toronto,
Ontario, Canada
|
-$252K |
| 5 |
AA
AQR Arbitrage
Greenwich,
Connecticut
|
-$145K |
QUMS Hedge Fund Activity: Q1 2026 in Review
29 of the 8,205 institutional investors tracked by Wall St. Rank reported a position in Quantumsphere Acquisition Corp (QUMS) for Q1 2026, worth a combined $76.4M — up 16% from $65.7M a quarter earlier.
Buyers outnumbered sellers: 5 funds opened new QUMS positions and 1 closed out — a net gain of 4 holders — while 6 added to existing stakes and 7 trimmed.
The largest buyer was Rivernorth Capital Management, opening a new position worth an estimated $4.28M. The largest seller was Clear Street, cutting an estimated $2.52M.
- 29 institutional investors held Quantumsphere Acquisition Corp (QUMS) as of Q1 2026, up from 25 in Q4 2025.
- Funds reported $76.4M of Quantumsphere Acquisition Corp stock for Q1 2026, up 16% quarter-over-quarter.
- 5 funds opened new Quantumsphere Acquisition Corp positions in Q1 2026 and 1 closed out, a net change of +4 holders.
- The largest Quantumsphere Acquisition Corp buyer in Q1 2026 was Rivernorth Capital Management, an estimated $4.28M added.
- The largest Quantumsphere Acquisition Corp seller in Q1 2026 was Clear Street, an estimated $2.52M sold.
Based on aggregated 13F filings for Q1 2026.