Pfizer stock slips today as $1.9 billion ViiV exit and Novavax Matrix‑M deal land
New York, January 20, 2026, 14:46 EST — During the regular session Pfizer (PFE) shares slipped 0.7% to $25.47 Tuesday afternoon, after GSK and Shionogi announced Pfizer will exit HIV-focused ViiV Healthcare in a $1.9 billion deal. Pfizer is set to get $1.88 billion for its 11.7% stake, with the deal expected to close in Q1 pending regulatory approval. That day, the stock fluctuated between $25.11 and $25.65. ViiV chair David Redfern called the move a way to “simplify the shareholder structure.” Pfizer has also cautioned investors that 2026 could be challenging, as COVID-19 product sales decline, pricing pressures mount,