As summer winds down, the M&A news keeps coming. Days after Amsterdam-based Wright Medical Group NV reported that it had agreed to acquire Cartiva Inc., a private orthopedic company in Alpharetta, Ga., for $435 million, Stryker Corp. said that it had inked a merger agreement with K2m Group Holdings Inc. Under the agreement, Stryker, of Kalamazoo, Mich., will acquire all of the issued and outstanding shares of common stock of Leesburg, Va.-based K2m in an all-cash transaction for $27.50 per share, or a total equity value of about $1.4 billion.