Shares of BioCryst Pharmaceuticals Inc. (BCRX) - Get Report rose 7.6% to $5.98 in premarket trading a day before the Fourth of July. The Research Triangle, N.C.-based firm develops small-molecule drugs that block key enzymes involved in rare diseases.

Omeros Corp. (OMER) - Get Report shares were up nearly 4% to $20.69. The Seattle-based company focuses on small-molecule and protein therapeutics for large-market and orphan indications that target inflammation, coagulopathies and central nervous system disorders.

Other biotech movers include Radius Health Inc. (RDUS) - Get Report . Shares of the Waltham, Mass.-based firm were up 2.8% to $46.49. Radius focuses on therapeutics in the areas of osteoporosis, oncology and endocrine diseases.

Jim Cramer and the AAP team share their thoughts on Walgreens Boots Alliance Inc.'s (WBA) - Get Report deal to buy 2,186 Rite Aid Corp. (RAD) - Get Report 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."