Biotech Movers: Paratek, Opko, Endo

Shares of Paratek Pharmaceuticals Inc. (PRTK) were down 9.6% to $23 in premarket trading on Friday, June 30. The Boston firm focuses on therapies based upon its expertise in tetracycline chemistry.

Meanwhile, shares of Opko Health Inc. (OPK) rose 3.5% to $6.87. The Miami-based firm's businesses include diagnostics, pharmaceuticals and biologics.

Other biotech movers include Endo International plc (ENDP) . Shares of the Dublin-based pharmaceutical company were up 3% to $11.57.

Jim Cramer and the AAP team share their thoughts on Walgreens Boots Alliance Inc.'s (WBA) deal to buy 2,186 Rite Aid Corp. (RAD) stores. Find out what they are telling their investment club members. Get a free trial subscription to Action Alerts PLUS.

Meanwhile, over on Real Money, Jonathan Heller writes that Monomoy Capital Partners, which is buying West Marine Inc. (WMAR) for $12.97 per share in a deal announced June 29, "is getting a heck of a bargain at that price."

More from Mergers and Acquisitions

Apple Buys Tesla? Amazon Buys Sears? 3 Dream Mergers That Just Make Sense

Apple Buys Tesla? Amazon Buys Sears? 3 Dream Mergers That Just Make Sense

AT&T-Time Warner Ruling Could Usher in More Healthcare Deals

AT&T-Time Warner Ruling Could Usher in More Healthcare Deals

Dropbox Soars in Third-Straight Record-Setting Session

Dropbox Soars in Third-Straight Record-Setting Session

Decision on AT&T's Merger With Time Warner Marks a Monumental Week for M&A

Decision on AT&T's Merger With Time Warner Marks a Monumental Week for M&A

JPM's Head of North America M&A Wants to Super-Charge M&A and Hire More Women

JPM's Head of North America M&A Wants to Super-Charge M&A and Hire More Women