Quantumsphere Acquisition Corp
QUMSR- 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; 25 institutions reported holding it in 13F filings for Q2 2026, worth $1.18M in total; no superinvestor holds it.
Q3 2025 vs. Q2 2025
How the institutions holding Quantumsphere Acquisition Corp changed between Q2 2025 and Q3 2025.
All holders in Q3 2025All holders in Q2 2025
| Measure | Q2 2025 | Q3 2025 | Change |
|---|---|---|---|
| Holders | 0 | 5 | +5 |
| Shares | 0 | 1.51M | +1.51M |
| Value | $0 | $230.1K | +$230.1K |
New holders (5)
Institutions that held Quantumsphere Acquisition Corp at the end of Q3 2025 but not at the end of Q2 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Highbridge Capital Management LLC | 700,000 | $133.0K | 0.01% |
| Hudson Bay Capital Management LP | 235,000 | $44.6K | 0.00% |
| Harraden Circle Investments, LLC | 167,500 | $31.8K | 0.01% |
| Toronto Dominion Bank | 50,000 | $14.5K | 0.00% |
| Mizuho Securities USA LLC | 357,801 | $6.14K | 0.00% |
Sold out (0)
Institutions that held Quantumsphere Acquisition Corp at the end of Q2 2025 and filed for Q3 2025 without it.
None.