Insmed (INSM) Stock After Hours on Dec. 19, 2025: Friday Rebound Holds, Analyst Targets Reset, and What to Watch Before the Next Market Open
Insmed Incorporated (NASDAQ: INSM) closed out a turbulent week with a sharp rebound on Friday, Dec. 19, 2025, and the move largely held after the bell—a sign that investors may be trying to stabilize expectations after the company’s latest clinical update whipsawed the stock earlier in the week. By the end of Friday’s regular session, INSM finished at about $174.84, up ~4.97% on the day. In after-hours trading, shares were roughly flat around $174.85 as of early evening, suggesting no new material catalyst hit the tape late Friday. MarketWatch One important calendar note: Dec. 20, 2025 is a Saturday, so