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NASDAQ:DAWN 13 November 2025

Mersana Therapeutics (MRSN) Soars on Up to $285 Million Day One Biopharmaceuticals Buyout: All the Key News on November 13, 2025

Mersana Therapeutics (MRSN) Soars on Up to $285 Million Day One Biopharmaceuticals Buyout: All the Key News on November 13, 2025

Mersana Therapeutics is back in the headlines in a big way today after announcing a definitive agreement to be acquired by Day One Biopharmaceuticals in a deal worth up to approximately $285 million. The news has sent MRSN shares rocketing higher and triggered immediate legal and regulatory attention, making this one of the most closely watched biotech deals of the day. GlobeNewswire Below is a complete roundup of today’s major developments around Mersana Therapeutics — structured and optimized for readers who find this via Google News or Discover.
13 November 2025
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Stock Market Today

  • Geiger Counter Ltd Buys Back 19,069 Shares at 63.95p Each
    July 1, 2026, 4:59 AM EDT. Geiger Counter Ltd repurchased 19,069 ordinary shares on June 30, 2026, paying an average of 63.95 pence per share. That price is about a 7% discount to fully diluted value. The company said the shares go into Treasury as part of an ongoing program. Since March 11, 2026, the group has repurchased 7,392,222 shares under the plan. After this buyback, Geiger Counter has 173,641,396 ordinary shares outstanding, with 118,410,966 voting shares and 55,230,430 in Treasury. The company said the buybacks are meant to keep capital structure and shareholder value on track.
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