Omeros (OMER) Stock Surges After Hours on Dec. 24, 2025 After FDA Approves Yartemlea — What to Know Before the Next Market Open
Omeros Corporation (NASDAQ: OMER) is ending Christmas Eve 2025 as one of the market’s most volatile and news-driven movers after the U.S. Food and Drug Administration approved the company’s first commercial product — a moment investors have waited years to see. As of 2:35 p.m. ET in after-hours trading on Wednesday, Dec. 24, 2025, OMER stock traded around $15.36, up about $6.59 (+75%) from the prior close, after swinging through a wide intraday range on heavy volume. This move matters not only because it’s dramatic — it’s because it’s tied to a hard catalyst: FDA approval of YARTEMLEA (narsoplimab‑wuug) for