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 $87.7M in total; no superinvestor holds it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, −2 vs. previous quarter
- 27
- 13F valueReported value at the end of Q2 2026
- $87.7M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding QUMS, Q2 2026
No superinvestor reported holding QUMS at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by Quantumsphere Acquisition Corp insiders from Form 4, newest first.
No open-market purchases or sales by Quantumsphere Acquisition Corp insiders are on file.
Top 10 13F holders, Q2 2026
The largest institutional positions in Quantumsphere Acquisition Corp at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Mizuho Securities USA LLC | 1,489,007 | $15.0M | 0.14% | +757,023+103.4% | Added |
| Berkley W R Corp | 881,402 | $9.01M | 0.44% | +372,862+73.3% | Added |
| Wolverine Asset Management LLC | 602,984 | $6.16M | 0.08% | −1,000−0.2% | Reduced |
| Karpus Management, Inc. | 469,875 | $4.80M | 0.14% | −24,000−4.9% | Reduced |
| Rivernorth Capital Management, LLC | 424,124 | $4.37M | 0.21% | −388−0.1% | Reduced |
| D. E. Shaw & Co., Inc. | 409,860 | $4.19M | 0.00% | 00.0% | Unchanged |
| Shaolin Capital Management LLC | 405,761 | $4.15M | 0.24% | −74,239−15.5% | Reduced |
| Glazer Capital, LLC | 400,089 | $4.09M | 0.10% | −22,930−5.4% | Reduced |
| Linden Advisors LP | 400,000 | $4.09M | 0.02% | 00.0% | Unchanged |
| Polar Asset Management Partners Inc. | 400,000 | $4.09M | 0.07% | 00.0% | Unchanged |