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Filing Details

Accession Number:: 0001104659-16-130143
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2016-06-29 16:44:51
Reporting Period:: 2016-06-27

Filing Date:: 2016-06-29
Accepted Time:: 2016-06-29 16:44:51
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1453687	Selecta Biosciences Inc	SELB	()	DE

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1439586	Polaris Venture Partners Special Founders' Fund V, L.p.	One Marina Park Drive, 10Th Fl. Boston MA 02210	No	No	Yes	No
1439587	Polaris Venture Partners Entrepreneurs' Fund V, L.p.	One Marina Park Drive, 10Th Fl. Boston MA 02210	No	No	Yes	No
1439588	Polaris Venture Partners Founders' Fund V, L.p.	One Marina Park Drive, 10Th Fl. Boston MA 02210	No	No	Yes	No
1439589	Polaris Venture Management Co. V, L.l.c.	One Marina Park Drive, 10Th Fl. Boston MA 02210	No	No	Yes	No
1439590	Polaris Venture Partners V, L.p.	One Marina Park Drive, 10Th Fl. Boston MA 02210	No	No	Yes	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2016-06-27	32,207	$0.00	32,972	No	4	C	Indirect	See Footnote
Common Stock	Acquisiton	2016-06-27	11,318	$0.00	11,586	No	4	C	Indirect	See Footnote
Common Stock	Acquisiton	2016-06-27	16,524	$0.00	16,916	No	4	C	Indirect	See Footnote
Common Stock	Acquisiton	2016-06-27	1,652,646	$0.00	1,691,963	No	4	C	Indirect	See Footnote
Common Stock	Acquisiton	2016-06-27	2,821	$14.00	35,793	No	4	P	Indirect	See Footnote
Common Stock	Acquisiton	2016-06-27	991	$14.00	12,577	No	4	P	Indirect	See Footnote
Common Stock	Acquisiton	2016-06-27	1,448	$14.00	18,364	No	4	P	Indirect	See Footnote
Common Stock	Acquisiton	2016-06-27	144,740	$14.00	1,836,703	No	4	P	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	See Footnote
No	4	C	Indirect	See Footnote
No	4	C	Indirect	See Footnote
No	4	C	Indirect	See Footnote
No	4	P	Indirect	See Footnote
No	4	P	Indirect	See Footnote
No	4	P	Indirect	See Footnote
No	4	P	Indirect	See Footnote

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A Convertible Preferred Stock	Disposition	2016-06-27	6,494	$0.00	6,494	$0.00
Common Stock	Series A Convertible Preferred Stock	Disposition	2016-06-27	2,282	$0.00	2,282	$0.00
Common Stock	Series A Convertible Preferred Stock	Disposition	2016-06-27	3,332	$0.00	3,332	$0.00
Common Stock	Series A Convertible Preferred Stock	Disposition	2016-06-27	333,207	$0.00	333,207	$0.00
Common Stock	Series B Convertible Preferred Stock	Disposition	2016-06-27	11,875	$0.00	11,875	$0.00
Common Stock	Series B Convertible Preferred Stock	Disposition	2016-06-27	4,174	$0.00	4,174	$0.00
Common Stock	Series B Convertible Preferred Stock	Disposition	2016-06-27	6,093	$0.00	6,093	$0.00
Common Stock	Series B Convertible Preferred Stock	Disposition	2016-06-27	609,316	$0.00	609,316	$0.00
Common Stock	Series C Convertible Preferred Stock	Disposition	2016-06-27	4,420	$0.00	4,420	$0.00
Common Stock	Series C Convertible Preferred Stock	Disposition	2016-06-27	1,553	$0.00	1,553	$0.00
Common Stock	Series C Convertible Preferred Stock	Disposition	2016-06-27	2,267	$0.00	2,267	$0.00
Common Stock	Series C Convertible Preferred Stock	Disposition	2016-06-27	226,801	$0.00	226,801	$0.00
Common Stock	Series D Convertible Preferred Stock	Disposition	2016-06-27	4,647	$0.00	4,647	$0.00
Common Stock	Series D Convertible Preferred Stock	Disposition	2016-06-27	1,632	$0.00	1,632	$0.00
Common Stock	Series D Convertible Preferred Stock	Disposition	2016-06-27	2,384	$0.00	2,384	$0.00
Common Stock	Series D Convertible Preferred Stock	Disposition	2016-06-27	238,470	$0.00	238,470	$0.00
Common Stock	Series E Convertible Preferred Stock	Disposition	2016-06-27	3,078	$0.00	4,771	$0.00
Common Stock	Series E Convertible Preferred Stock	Disposition	2016-06-27	1,082	$0.00	1,677	$0.00
Common Stock	Series E Convertible Preferred Stock	Disposition	2016-06-27	1,579	$0.00	2,448	$0.00
Common Stock	Series E Convertible Preferred Stock	Disposition	2016-06-27	157,957	$0.00	244,852	$0.00

Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect

Footnotes

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.
Each of Jonathan A. Flint ("Flint") and Terrance G. McGuire ("McGuire") are the managing members of PVM V. Amir Nashat ("Nashat"), who is a member of the Issuer's Board of Directors, is a member of PVM V. Each of Flint, McGuire and Nashat, 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 Nashat 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.
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.
Each of Flint and McGuire are the managing members of PVM V. Nashat, who is a member of the Issuer's Board of Directors, is a member of PVM V. Each of Flint, McGuire and Nashat, 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 Nashat 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.
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.
Each of Flint and McGuire are the managing members of PVM V. Nashat, who is a member of the Issuer's Board of Directors, is a member of PVM V. Each of Flint, McGuire and Nashat, 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 Nashat 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.
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.
Each of Flint and McGuire are the managing members of PVM V. Nashat, who is a member of the Issuer's Board of Directors, is a member of PVM V. Each of Flint, McGuire and Nashat, 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 Nashat 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.
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.
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.