Performant Healthcare (PHLT) agreed to be acquired by Machinify, a health-care intelligence company backed by New Mountain Capital, for $670 million.

Shares of Performant more than doubled as intraday volume topped 14.4 million shares versus the daily average of almost 192,000.

Tenon Medical (TNON) acquired sacroiliac joint-focused assets from Tampa, Florida-based startup SiVantage.

Shares of Tenon rose 54% as volume topped 220.7 million versus the daily average of almost 212,000.

I-MAB (IMAB) priced an underwritten offering of 33.3 million American depositary shares, representing 76.7 million ordinary shares, at $1.95 each for total proceeds of $65 million.

The stock jumped 25% as volume topped 41 million versus the daily average of about 587,000.

Price: 7.62, Change: +4.07, Percent Change: +114.65