Quantumsphere Acquisition Corp
QUMSU- 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; 7 institutions reported holding it in 13F filings for Q2 2026, worth $1.95M in total; no superinvestor holds it.
Q2 2026 vs. Q1 2026
How the institutions holding Quantumsphere Acquisition Corp changed between Q1 2026 and Q2 2026.
All holders in Q2 2026All holders in Q1 2026
| Measure | Q1 2026 | Q2 2026 | Change |
|---|---|---|---|
| Holders | 8 | 7 | −1 |
| Shares | 288.3K | 188.8K | −99.4K (−34.5%) |
| Value | $2.94M | $1.95M | −$995.4K (−33.8%) |
New holders (0)
Institutions that held Quantumsphere Acquisition Corp at the end of Q2 2026 but not at the end of Q1 2026.
None.
Sold out (1)
Institutions that held Quantumsphere Acquisition Corp at the end of Q1 2026 and filed for Q2 2026 without it.
| Institution | Shares, Q1 2026 | Value, Q1 2026 |
|---|---|---|
| Westchester Capital Management, LLC | 100,000 | $1.01M |