Cartesian Therapeutics, Inc. — Director's Dealing 2021

Dec 3, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SELECTA BIOSCIENCES INC (SELB)
CIK: 0001453687
Period of Report: 2021-12-01

Reporting Person: Brunn Carsten (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-01	Common Stock	M	10938	—	Acquired	289697	Direct
2021-12-02	Common Stock	S	4746	$2.9635	Disposed	284951	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-12-01	Restricted Stock Units	$	M	10938	Disposed		Common Stock (10938.0)	Direct

Footnotes

F1: Shares sold to satisfy withholding tax obligations upon the vesting of restricted stock units and to cover related broker fees.

F2: The price reported is a weighted average price. The shares were sold in multiple transactions at per share prices ranging from $2.94 to $2.99. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3: Each restricted stock unit represents a contingent right to receive one share of common stock.

F4: This restricted stock unit vested as to 25% on December 1, 2019 and has vested, and will continue to vest, as to an additional 8.33% each quarter thereafter until fully vested. The restricted stock units have no expiration date.