Call Start: 16:30 January 1, 0000 5:14 PM ET Synthetic Biologics Inc. (SYN) Q4 2018 Earnings Conference Call February 27, 2019 16:30 ET Company Participants Vincent Perrone - Director, Corporate Communications Steven Shallcross - CEO & CFO Vince Wacher - Head, Product & Corporate Development Conference Call Participants Katherine Xu - William Blair Jim Molloy - Alliance Global Partners Operator Good afternoon and welcome to the Synthetic Biologics 2018 Year End Investor Conference Call. All participants wil ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-K x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the transition period from to Commission File Number: 1-12584 SYNTHETIC BIOLOGICS, INC. (Exact Name of Registrant as Specified in Its Charter) Nevada 13-3808303 (State or Other Jurisdiction of Incorporation or Or ...