 Roche Holding AG OTC: RHHBY acquired GenMark Diagnostics, Inc NASDAQ: GNMK in a 1.8 billion deal on Monday, the same day Veracyte Inc NASDAQ: VCYT announced it completed the acquisition of Decipher Biosciences, Inc. What Happened: With the cancer diagnostic market expected to grow to 261.34 billion by 2027 more than double the 115.60 billion it was worth last year big biotech companies have been on an acquisition spree to boost their portfolios and technology. 