Quantum BioPharma is trading at $2.48, up 17.53%, in pre-market, with no clear catalyst identified.
- The company filed a supplement ahead of its November 10 shareholder meeting clarifying fractional-share treatment and a 70% voting-power cap; available reports do not link the filing to the pre-market rise.
- Nasdaq lists November 6 as an estimated earnings date, not confirmation that results were released.