Quantumsphere Acquisition Corp
QUMS- Exchange
- Nasdaq
- Industry
- Blank Checks
- SEC CIK
- 0002070900
No open-market purchases or sales by Quantumsphere Acquisition Corp insiders were filed in the last 90 days; 27 institutions reported holding it in 13F filings for Q2 2026, worth $80.3M in total; no superinvestor holds it.
Q1 2026 vs. Q4 2025
How the institutions holding Quantumsphere Acquisition Corp changed between Q4 2025 and Q1 2026.
All holders in Q1 2026All holders in Q4 2025
| Measure | Q4 2025 | Q1 2026 | Change |
|---|---|---|---|
| Holders | 25 | 29 | +4 |
| Shares | 6.57M | 7.56M | +986.8K (+15.0%) |
| Value | $65.7M | $76.4M | +$10.7M (+16.3%) |
New holders (5)
Institutions that held Quantumsphere Acquisition Corp at the end of Q1 2026 but not at the end of Q4 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Rivernorth Capital Management, LLC | 424,512 | $4.30M | 0.22% |
| Polar Asset Management Partners Inc. | 400,000 | $4.05M | 0.10% |
| Highbridge Capital Management LLC | 121,078 | $1.23M | 0.08% |
| Crossingbridge Advisors, LLC | 107,825 | $1.09M | 0.20% |
| RLH Capital LLC | 100,000 | $1.01M | 0.51% |
Sold out (1)
Institutions that held Quantumsphere Acquisition Corp at the end of Q4 2025 and filed for Q1 2026 without it.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| Warberg Asset Management LLC | 41,421 | $414.6K |