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Filing Details

Accession Number:: 0001415889-24-004471
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2024-02-20 18:36:47
Reporting Period:: 2024-02-15

Accepted Time:: 2024-02-20 18:36:47
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1818794	Dyne Therapeutics Inc.	DYN	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1577014	P Jason Rhodes	C/O Dyne Therapeutics, Inc. 830 Winter St. Waltham MA 02451		No	No	No	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	Disposition	2024-02-15	175,793	$23.88	7,150,324	No	4	S	Indirect	See footnote
Common Stock	Disposition	2024-02-15	2,113	$24.45	7,148,211	No	4	S	Indirect	See footnote
Common Stock	Disposition	2024-02-16	162,707	$23.14	6,985,504	No	4	S	Indirect	See footnote
Common Stock	Disposition	2024-02-20	166,029	$22.71	6,819,475	No	4	S	Indirect	See footnote
Common Stock	Disposition	2024-02-20	3,510	$23.40	6,815,965	No	4	S	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	1,608,785	Indirect	See footnote
Common Stock	934,581	Indirect	See footnote

Footnotes

This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by Atlas Venture Fund XI, L.P. on January 10, 2024.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.40 to $24.3943 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the 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 in footnotes (2), (4), (5), (6) and (7).
The shares are held directly by Atlas Venture Fund XI, L.P. ("Atlas Venture Fund XI"). The general partner of Atlas Venture Fund XI is Atlas Venture Associates XI, L.P. ("AVA XI LP"). Atlas Venture Associates XI, LLC ("AVA XI LLC") is the general partner of AVA XI LP. The Reporting Person is a member of AVA XI LLC and disclaims beneficial ownership of such securities held by Atlas Venture Fund XI, except to the extent of his pecuniary interest therein, if any.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.40 to $24.51 inclusive.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.878 to $23.54 inclusive.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.117 to $23.09 inclusive.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.16 to $24.01 inclusive.
The shares are held directly by Atlas Venture Opportunity Fund I, L.P. ("Atlas Venture Opportunity Fund I"). The general partner of Atlas Venture Opportunity Fund I is Atlas Venture Associates Opportunity I, L.P. ("AVAO I LP"). Atlas Venture Associates Opportunity I, LLC ("AVAO I LLC") is the general partner of AVAO I LP. The reporting person is a member of AVAO I LLC and disclaims beneficial ownership of such securities held by Atlas Venture Opportunity Fund I, except to the extent of his pecuniary interest therein, if any.
The shares are owned directly by Atlas Venture Opportunity Fund II, L.P. ("AVOF II"). Atlas Venture Associates Opportunity II, LP ("AVAO II LP") is the general partner of AVOF II. Atlas Venture Associates Opportunity II, LLC ("AVAO II LLC") is the general partner of AVAO II LP. The Reporting Person is a member of AVAO II LLC and disclaims Section 16 beneficial ownership of such securities held by AVOF II, except to the extent of his pecuniary interest therein, if any.