On this episode of Stock Movers: 

- Pfizer (PFE) is the second biggest gainer in the S&P today. Shares rise after the Washington Post reported that President Donald Trump will announce an agreement with the drugmaker to voluntarily sell its medications through Medicaid at lower prices.

-  CoreWeave (CRWV) shares are up as much as 16% today, after the cloud-computing provider signed a deal to supply Meta Platforms with as much as $14.2 billion worth of computing power. The deal runs through December 2031 with an option to extend through 2032 with additional capacity, and helps diversify CoreWeave’s business away from Microsoft.

- Firefly Aerospace (FLY) plunged as much as 25% after a core segment of one of the company’s rockets exploded on a test stand. The event resulted in a complete loss of Firefly’s Alpha Flight 7 first stage, making the company's plans to launch two of its Alpha rockets before the end of the year unlikely.