Dynavax Technologies (DVAX) Stock After the Bell on Dec. 24, 2025: Sanofi’s $2.2B Buyout, After‑Hours Action, and What to Watch Before the Next Market Open
Sanofi agreed to acquire Dynavax Technologies for $15.50 per share in cash, valuing the deal at about $2.2 billion. DVAX shares surged 39% to around $15.45, trading near the offer price after the announcement. Volume topped 30 million shares in a volatile session shortened for the holiday. The transaction is expected to close in Q1 2026, pending customary conditions.