Today
+5.01%
5 Days
+9.18%
1 Month
-4.55%
6 Months
-11.25%
Year to Date
-27.55%
1 Year
-50.19%
Quantum SI (QSI) Q2 2026 Earnings Call: Proteus Launch Moved to Q2 2027


| Shareholders | Proportion |
|---|---|
| Rothberg (Jonathan M) | 6.93% |
| BlackRock Institutional Trust Company, N.A. | 6.11% |
| Vanguard Capital Management, LLC | 3.55% |
| ARK Investment Management LLC | 3.48% |
| Shareholder Types | Proportion |
|---|---|
| Investment Advisor | 19.34% |
| Individual Investor | 10.68% |
| Investment Advisor/Hedge Fund | 8.71% |
| Hedge Fund | 2.40% |
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