SYNLOGIC, INC. — Director's Dealing 2015

Oct 1, 2015

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Mirna Therapeutics, Inc. (MIRN)
CIK: 0001527599
Period of Report: 2015-09-30

Reporting Person: Florence Anthony A. Jr. (10% Owner)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Series C Preferred Stock	$0.00		Common Stock (1241649)		Indirect
Series D Preferred Stock	$0.00		Common Stock (583559)		Indirect

Footnotes

F1: Each share of Series C Preferred Stock will automatically convert on a one-to-one basis into Common Stock immediately prior to the consummation of the Issuer's initial public offering.

F2: The securities are immediately convertible.

F3: The expiration date is not relevant to the conversion of these securities.

F4: The Reporting Person is a director of NEA 14 GP, LTD, which is the sole general partner of NEA Partners 14, L.P. ("NEA Partners 14"). NEA Partners 14 is the sole general partner of New Enterprise Associates 14, L.P. ("NEA 14"), which is the direct beneficial owner of the securities. The Reporting Person disclaims beneficial ownership, within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the NEA 14 shares in which the Reporting Person has no pecuniary interest.

F5: Each share of Series D Preferred Stock will automatically convert on a one-to-one basis into Common Stock immediately prior to the consummation of the Issuer's initial public offering.