LanzaTech Global (LNZA) signed a securities purchase agreement with certain institutional investors to sell 2 million shares in a registered direct offering, targeting gross proceeds of about $20 million, the company said Friday.

Shares sank 43% following an increase in intraday trading volume to almost 323,000 from a daily average of over 44,000.

Aardvark Therapeutics (AARD) said the US Food and Drug Administration has placed a full clinical hold on its investigational new drug application for ARD-101, according to a company statement late Thursday.

Morgan Stanley downgraded the stock to underweight from equalweight, and BTIG to neutral from buy.

Shares of Aardvark slumped 31% as intraday trading volume advanced to more than 565,000 from a daily average of over 282,000.

York Space Systems (YSS) reported a Q1 loss of $114.8 million, compared with a loss of $11.7 million a year earlier.

Shares dropped 18%, with intraday trading volume at nearly 2.85 million, compared with a daily average of over 2.02 million.

Price: 9.74, Change: -7.41, Percent Change: -43.21