Stephen Mayo, Director at Merck & Company, holds 100.00 shares in Merck & Company (Ticker: MRK), holds 6.62K shares in Sarepta Therapeutics (Ticker: SRPT), holds 25.33K shares in Allogene Therapeutics (Ticker: ALLO). Most recently, Stephen Mayo ― shares of Merck & Company on ― for an estimated value of ―.