Page updated ·next FDA decision on the calendar·Data as of Oct 14, 2026 7:39 PM ET
Price into the decision (T-120)
Daily close, T-120 (1/7/25) through T+5. Run-up high $42.49 on 6/13/25, low $32.08 on 1/21/25 (T-120 to T-1). FDA decision 6/24/25. Historical price action, not a forecast.
Positioning before the decision
On Jun 10, 2025, 14 days before the decision date, at-the-money options priced a move of ±4.4% through Jun 27, 2025 (the first listed expiry after the decision; ATM implied volatility 26%). The stock closed +1.1% at the first close across the decision and +0.4% five trading days on. A straddle priced weeks out covers ordinary movement plus the event, so this is the move the options market priced through that expiry, not the event-implied move alone. How this compares across 1,000+ decisions.
Every FDA approval letter and released Complete Response Letter we hold, by FDA action date: FDA approval letters.
Questions
Was Benlysta (belimumab) Autoinjector approved by the FDA?
Yes. The FDA approved the application for Benlysta (belimumab) Autoinjector on June 20, 2025, per the FDA's own record. The company announced it on June 24, 2025. The primary source is linked on this page.
What was Benlysta (belimumab) Autoinjector under FDA review for?
The application covered Active lupus nephritis in children. The FDA approved the application on June 24, 2025.
How did GSK stock react to the FDA decision?
On the decision day GSK moved +1.1%. That is the recorded reaction to this specific event. Historical measurement, not a prediction, and not investment advice.