Cartesian Therapeutics, Inc. — Director's Dealing 2016

Jun 29, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SELECTA BIOSCIENCES INC (SELB)
CIK: 0001453687
Period of Report: 2016-06-27

Reporting Person: Nashat Amir (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-06-27	Common Stock	C	32207	—	Acquired	32972	Indirect
2016-06-27	Common Stock	C	11318	—	Acquired	11586	Indirect
2016-06-27	Common Stock	C	16524	—	Acquired	16916	Indirect
2016-06-27	Common Stock	C	1652646	—	Acquired	1691963	Indirect
2016-06-27	Common Stock	P	2821	$14.00	Acquired	35793	Indirect
2016-06-27	Common Stock	P	991	$14.00	Acquired	12577	Indirect
2016-06-27	Common Stock	P	1448	$14.00	Acquired	18364	Indirect
2016-06-27	Common Stock	P	144740	$14.00	Acquired	1836703	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-06-27	Series A Convertible Preferred Stock	$	C	6494	Disposed		Common Stock (6494)	Indirect
2016-06-27	Series A Convertible Preferred Stock	$	C	2282	Disposed		Common Stock (2282)	Indirect
2016-06-27	Series A Convertible Preferred Stock	$	C	3332	Disposed		Common Stock (3332)	Indirect
2016-06-27	Series A Convertible Preferred Stock	$	C	333207	Disposed		Common Stock (333207)	Indirect
2016-06-27	Series B Convertible Preferred Stock	$	C	11875	Disposed		Common Stock (11875)	Indirect
2016-06-27	Series B Convertible Preferred Stock	$	C	4174	Disposed		Common Stock (4174)	Indirect
2016-06-27	Series B Convertible Preferred Stock	$	C	6093	Disposed		Common Stock (6093)	Indirect
2016-06-27	Series B Convertible Preferred Stock	$	C	609316	Disposed		Common Stock (609316)	Indirect
2016-06-27	Series C Convertible Preferred Stock	$	C	4420	Disposed		Common Stock (4420)	Indirect
2016-06-27	Series C Convertible Preferred Stock	$	C	1553	Disposed		Common Stock (1553)	Indirect
2016-06-27	Series C Convertible Preferred Stock	$	C	2267	Disposed		Common Stock (2267)	Indirect
2016-06-27	Series C Convertible Preferred Stock	$	C	226801	Disposed		Common Stock (226801)	Indirect
2016-06-27	Series D Convertible Preferred Stock	$	C	4647	Disposed		Common Stock (4647)	Indirect
2016-06-27	Series D Convertible Preferred Stock	$	C	1632	Disposed		Common Stock (1632)	Indirect
2016-06-27	Series D Convertible Preferred Stock	$	C	2384	Disposed		Common Stock (2384)	Indirect
2016-06-27	Series D Convertible Preferred Stock	$	C	238470	Disposed		Common Stock (238470)	Indirect
2016-06-27	Series E Convertible Preferred Stock	$	C	3078	Disposed		Common Stock (4771)	Indirect
2016-06-27	Series E Convertible Preferred Stock	$	C	1082	Disposed		Common Stock (1677)	Indirect
2016-06-27	Series E Convertible Preferred Stock	$	C	1579	Disposed		Common Stock (2448)	Indirect
2016-06-27	Series E Convertible Preferred Stock	$	C	157957	Disposed		Common Stock (244852)	Indirect

Footnotes

F1: The reportable securities are owned directly by Polaris Venture Partners Entrepreneurs' Fund V, L.P. ("PVPE V"). Polaris Venture Management Co. V, L.L.C. ("PVM V") is the general partner of PVPE V. PVM V disclaims beneficial ownership of these securities and this report shall not be deemed an admission that PVM V is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of its pecuniary interest therein.

F2: Each of Jonathan A. Flint ("Flint") and Terrance G. McGuire ("McGuire") are the managing members of PVM V. The Reporting Person, who is a member of the Issuer's Board of Directors, is a member of PVM V. Each of Flint, McGuire and the Reporting Person, in their respective capacities with regard to PVM V, may be deemed to have shared voting and dispositive power of the shares held by PVPE V. Each of Flint, McGuire and the Reporting Person disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their pecuniary interest therein.

F3: The reportable securities are owned directly by Polaris Venture Partners Founders' Fund V, L.P. ("PVPFF V"). PVM V is the general partner of PVPFF V. PVM V disclaims beneficial ownership of these securities and this report shall not be deemed an admission that PVM V is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of its pecuniary interest therein.

F4: Each of Flint and McGuire are the managing members of PVM V. The Reporting Person, who is a member of the Issuer's Board of Directors, is a member of PVM V. Each of Flint, McGuire and the Reporting Person, in their respective capacities with regard to PVM V, may be deemed to have shared voting and dispositive power of the shares held by PVPFF V. Each of Flint, McGuire and the Reporting Person disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their pecuniary interest therein.

F5: The reportable securities are owned directly by Polaris Venture Partners Special Founders' Fund V, L.P. ("PVPSFF V"). PVM V is the general partner of PVPSFF V. PVM V disclaims beneficial ownership of these securities and this report shall not be deemed an admission that PVM V is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of its pecuniary interest therein.

F6: Each of Flint and McGuire are the managing members of PVM V. The Reporting Person, who is a member of the Issuer's Board of Directors, is a member of PVM V. Each of Flint, McGuire and the Reporting Person, in their respective capacities with regard to PVM V, may be deemed to have shared voting and dispositive power of the shares held by PVPSFF V. Each of Flint, McGuire and the Reporting Person disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their pecuniary interest therein.

F7: The reportable securities are owned directly by Polaris Venture Partners V, L.P. ("PVP V"). PVM V is the general partner of PVP V. PVM V disclaims beneficial ownership of these securities and this report shall not be deemed an admission that PVM V is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of its pecuniary interest therein.

F8: Each of Flint and McGuire are the managing members of PVM V. The Reporting Person, who is a member of the Issuer's Board of Directors, is a member of PVM V. Each of Flint, McGuire and the Reporting Person, in their respective capacities with regard to PVM V, may be deemed to have shared voting and dispositive power of the shares held by PVP V. Each of Flint, McGuire and the Reporting Person disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their pecuniary interest therein.

F9: The preferred stock is convertible at any time, at the holder's election and has no expiration date. The preferred stock automatically converted into common stock on a 1-for-1 basis upon the closing of the Issuer's initial public offering.

F10: The Series E Convertible Preferred Stock is convertible at any time, at the holder's election and has no expiration date. The Series E Convertible Preferred Stock automatically converted into common stock on an approximately 1-for-1.550115 basis upon the closing of the Issuer's initial public offering.