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Filing Details

Accession Number:: 0000899243-20-026189
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2020-09-23 19:09:07
Reporting Period:: 2020-09-21

Accepted Time:: 2020-09-23 19:09:07
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1818794	Dyne Therapeutics Inc.	DYN	()	CA

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1792126	Logos Global Management Lp	1 Letterman Drive, Suite D3-700 San Francisco CA 94129		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	2020-09-21	804,392	$0.00	804,392	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2020-09-21	700,000	$19.00	1,504,392	No	4	P	Indirect	See footnotes

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

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series B Preferred Stock	Disposition	2020-09-21	2,668,089	$0.00	804,392	$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

On September 21, 2020, the Series B Preferred Stock automatically converted into Common Stock on a 3.3169-for-one basis without payment of further consideration upon closing of the initial public offering of the Issuer's common stock. The shares had no expiration date.
The reporting persons are Logos Opportunities Fund II LP (the "Fund"), Logos Global Management LP ("LGM"), Logos Global Management GP LLC ("LGM GP"), Logos Opportunities GP LLC ("Fund GP"), Logos GP LLC ("Logos GP"), Dr. Arsani William and Dr. Graham Walmsley. LGM is the investment adviser of private funds, including the Fund. LGM GP is the general partner of LGM. Fund GP is the general partner of the Fund. Logos GP is the manager of Fund GP. Dr. William and Dr. Walmsley are controlling persons of LGM and Logos GP and managers of the Fund. LGM is filing this report for itself and the other reporting persons. The reporting persons are filing this Form 3 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934.
The Fund holds the securities reported herein directly for the benefit of its investors. The securities may be deemed to be indirectly beneficially owned by LGM as investment adviser to the Fund, by LGM GP as general partner of LGM, by Fund GP as general partner of the Fund, by Logos GP as manager of Fund GP and by Dr. William and Dr. Walmsley as controlling persons of LGM and Logos GP. The reporting persons disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.