SYNLOGIC, INC. — Director's Dealing 2015

Oct 6, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Mirna Therapeutics, Inc. (MIRN)
CIK: 0001527599
Period of Report: 2015-10-05

Reporting Person: Alleva Lawrence M (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-10-05	Common Stock	C	3818	—	Acquired	3818	Indirect
2015-10-06	Common Stock	J	207	$0.00	Acquired	4025	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-10-05	Series D Preferred Stock	$	C	3818	Disposed		Common Stock (3818)	Indirect

Footnotes

F1: Each share of Series D Preferred Stock automatically converted on a one-to-one basis into Common Stock upon the consummation of the Issuer's initial public offering.

F2: The shares are held by the Lawrence M. Alleva Profit Sharing Plan.

F3: The shares were issued for no additional consideration pursuant to an accruing paid-in-kind dividend on shares of Series D Preferred Stock of the Company.

F4: The expiration date is not relevant to the conversion of these securities.