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Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock.  RSUs vest in three equal installments beginning on February 28, 2018."}],"balance_after":76866,"source":{"system":"sec-edgar","filing":"0001179110-17-003658","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/911177/000117911017003658/edgar.xml","form_type":"4"}}]}