Terrance Mcguire - Jun 3, 2021 Form 4 Insider Report for Cyclerion Therapeutics, Inc. (CYCN)

Role: Director
Signature: /s/ Lauren Crockett Attorney-in-Fact
Stock symbol: CYCN
Transactions as of: Jun 3, 2021
Transactions value $: $299,997
Form type: 4
Date filed: 6/7/2021, 05:36 PM
Next filing: Jun 22, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CYCN	Common Stock	Purchase	$290K	+92.8K	+15.36%	$3.12	697K	Jun 3, 2021	By Polaris Partners VIII, L.P.	F1, F2
transaction	CYCN	Common Stock	Purchase	$10.4K	+3.32K	+15.35%	$3.12	25K	Jun 3, 2021	By Polaris Entrepreneurs' Fund VIII, L.P.	F1, F3
holding	CYCN	Common Stock						162	Jun 3, 2021	By Polaris Venture Management Co. II, L.L.C.	F4
holding	CYCN	Common Stock						6.91K	Jun 3, 2021	By Bartlett Partners, LLC	F5
holding	CYCN	Common Stock						11K	Jun 3, 2021	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	On June 3, 2021, Polaris Partners VIII, L.P. ("PP VIII") and Polaris Entrepreneurs' Fund VIII, L.P. ("PEF VIII") agreed to purchase directly from the Issuer such shares of Common Stock of the Issuer in a private placement transaction.
F2	The reportable securities are owned directly by PP VIII. Polaris Partners GP VIII, L.L.C. ("PPGP VIII") is the general partner of PP VIII. The Reporting Person, a member of the Issuer's Board of Directors, is an interest holder of PPGP VIII. Each of David Barrett, Brian Chee, Amir Nashat and Bryce Youngren are the managing members of PPGP VIII (collectively, the "Managing Members"). Each of the Reporting Person and the Managing Members, in their respective capacities with respect to PPGP VIII, may be deemed to have shared voting and dispositive power over the shares held by PP VIII. Each of PPGP VIII, the Reporting Person and the Managing Members disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any one 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 respective pecuniary interests therein.
F3	The reportable securities are owned directly by PEF VIII. PPGP VIII is the general partner of PEF VIII. The Reporting Person, a member of the Issuer's Board of Directors, is an interest holder of PPGP VIII. Each of the Reporting Person and the Managing Members, in their respective capacities with respect to PPGP VIII, may be deemed to have shared voting and dispositive power over the shares held by PEF VIII. Each of PPGP VIII, the Reporting Person and the Managing Members disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any one 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 respective pecuniary interests therein.
F4	The Reporting Person and Jonathan Flint ("Flint") are the managing members of Polaris Venture Management Co. II, L.L.C., the beneficial owner of the securities. Each of the Reporting Person and Flint disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any one 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 respective pecuniary interests therein.
F5	The Reporting Person is a managing member of Bartlett Partners, LLC, the beneficial owner of the securities. The Reporting Person disclaims beneficial ownership of these securities and this report shall not be deemed an admission that he is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of his pecuniary interest therein.