Cartesian Therapeutics, Inc. — Director's Dealing 2017

Jul 6, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SELECTA BIOSCIENCES INC (SELB)
CIK: 0001453687
Period of Report: 2017-07-03

Reporting Person: Johnston Lloyd P. (COO and SVP, R*D)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-07-03	Common Stock	M	5959	$2.77	Acquired	7565	Direct
2017-07-03	Common Stock	S	100	$19.74	Disposed	7465	Direct
2017-07-03	Common Stock	S	5859	$19.0873	Disposed	1606	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-07-03	Employee Stock Option (right to buy)	$2.77	M	5959	Disposed	2023-06-13	Common Stock (5959)	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 21, 2016.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.72 to $19.76, inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.605 to $19.40, inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

F4: All shares underlying this option are fully vested.