HANOVER, Md. & PETALUMA, Calif.--(BUSINESS WIRE)--Ciena® Corporation (NYSE:CIEN) and Cyan, Inc. (NYSE:CYNI), today announced that early termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the “HSR Act”) has been granted, effective June 15, 2015, for Ciena’s planned acquisition of Cyan. Expiration of the waiting period under the HSR Act satisfies one of the conditions necessary for the consummation of the merger. The transaction remains subject to ot