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(Updates from 10:45 a.m. ET with closing information.) NEW YORK ( TheStreet) -- Here's what Jim Cramer had to say on CNBC's "Squawk On The Street" Wednesday. Radian Group ( RDN) has come back from the dead. "Mortgage insurance -- bad ones rolling off, good ones coming on. It's a buy," Cramer said. RDN fell 4.3% to $11.44. Chesapeake Energy ( CHK) "had a good quarter. It was a clean quarter, as far as I can tell," Cramer said, but people don't understand what the company does. CHK fell 1.8% to $19.19. Regeneron Pharmaceuticals ( REGN) has a lot of drugs in the pipeline and the company "has been one of the great performers," Cramer said. The stock shot up 22.2% to close at $237.29. Humana ( HUM) knows how to execute, Cramer said. "This company is best of breed." HUM was up 4.7% at $77.56. Spirit Airlines ( SAVE) is in a "remarkable situation in terms of the cheapest airline," Cramer said. SAVE flew 2.6% higher to $27.39. "When is it going to be enough to serve good donuts?" Cramer asked, noting activist investors want to break up donut shop Tim Hortons ( THI). THI was up 4% to close Wednesday at $56.32. To sign up for Jim Cramer's free Booyah! newsletter, with all of his latest articles and videos, please click here. -- Written by Anthony Buccino in New York. Follow @AnthonyBuccino