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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1453687	Selecta Biosciences Inc	SELB	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1621636	Osage University Partners Ii, L.p.	50 Monument Road, Suite 201 Bala Cynwyd PA 19004	No	No	Yes	No
1677536	Osage Partners, Llc	50 Monument Road, Suite 201 Bala Cynwyd PA 19004	No	No	Yes	No
1677537	Osage University Gp Ii, L.p.	50 Monument Road, Suite 201 Bala Cynwyd PA 19004	No	No	Yes	No

Reported Non-Derivative Transactions

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	441,628	$0.00	512,543	No	4	C	Indirect	See Footnote
Common Stock	Acquisiton	2016-06-27	350,000	$14.00	862,543	No	4	P	Indirect	See Footnote

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series E Convertible Preferred Stock	Disposition	2016-06-27	284,900	$0.00	441,628	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Indirect

Footnotes

Held by Osage University Partners II, L.P. ("Osage"). Osage Partners, LLC ("Osage Partners") is the general parter of Osage University GP II, LP ("Osage GP"), which is the general partner of Osage. Osage Partners and Osage GP may be deemed to share voting and investment power with respect to all shares held by Osage. Each of the filing persons disclaims beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein.
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.