Premarket Movers | Nike Jumps 2%; AST SpaceMobile up 4%; UiPath Gains 6%; Sidus Space Soars 9%; Dynavax Surges 38%

Nike rose 2% in premarket trading on Wednesday after Apple CEO Tim Cook bought nearly $3 million shares of depressed Nike stock following the company’s disappointing earnings report last week.

Cook, who is the lead independent director of Nike and a board member since 2005, bought 50,000 shares of Nike stock on Monday at an average price of $58.97, according to a form 4 filing with the Securities and Exchange Commission late Tuesday.

UiPath shares rose 6% in premarket trading on Wednesday after it was announced the company will join the S&P Midcap 400.

After the market close on Tuesday, S&P Dow Jones Indices announced that agentic automation company UiPath will replace Synovus Financial Corp in the S&P MidCap 400, effective prior to the market open on Jan. 2, 2026.

AST SpaceMobile, Inc. rose 4% in premarket trading on Wednesday.

Dynavax rose 38% in premarket trading on Wednesday after French pharmaceutical giant Sanofi said it plans to acquire Dynavax for $15.50 per share in cash, valuing the vaccines company at about $2.2 billion, according to a statement released Wednesday. 

Sidus Space Inc. rose 9% in premarket trading on Wednesday after space and defense technology company Sidus Space aims to raise $25 million in a public offering. Sidus Space announced Monday it plans to sell 19,230,800 shares at $1.30 per share in an offering expected to close on Dec. 24.