Mersana Therapeutics, Inc. (MRSN:NASDAQ) closed at $29.08 on January 6, 2026, unchanged on the day. The stock trades 4.3% below its 52-week high of $30.39 and 458.2% above its 52-week low of $5.21. Mersana Therapeutics, Inc. is part of the Health Care sector (Major Pharmaceuticals).
In 252 trading sessions since October 23, 2025, MRSN closed higher on 29 days (12%). Its best day was November 13, 2025 (+209.24%) and its worst was November 4, 2025 (-13.56%). The stock moved 10% or more in a single session 2 times. It opened at least 5% above the previous day's high 1 time.
Mersana Therapeutics Inc is a clinical stage biopharmaceutical company focused on developing antibody drug conjugates, or ADCs, that offer a clinically meaningful benefit for cancer patients with significant unmet need.
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Based on end-of-day data. For information only, not investment advice.