 Shares of Casa Systems Inc. CASA, -1.02 rocketed 49.1 to pace all premarket gainers Monday, after the communications infrastructure company announced that Verizon Communications Inc. VZ, -0.57 will take a 9.9 stake in the company as part of a multi-year purchase contract. Under terms of the contract, Verizon will buy 40 million worth of Casa stock, and Casa will provide its 5G Core Network Functions to Verizon. 