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SEC FORM 3 SEC Form 3
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940 		 
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OMB Number: 3235-0104
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1. Name and Address of Reporting Person*
Atlas Venture Opportunity Fund II, L.P.
(Last) (First) (Middle)
300 TECHNOLOGY SQUARE, 8TH FLOOR
(Street)
CAMBRIDGE MA 02139
(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
11/03/2023 		3. Issuer Name and Ticker or Trading Symbol
Korro Bio, Inc. [ KRRO ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock 177,217 D(1)
Common Stock 942,075 I See Footnote(2)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
1. Name and Address of Reporting Person*
Atlas Venture Opportunity Fund II, L.P.
(Last) (First) (Middle)
300 TECHNOLOGY SQUARE, 8TH FLOOR
(Street)
CAMBRIDGE MA 02139
(City) (State) (Zip)
1. Name and Address of Reporting Person*
Atlas Venture Fund XI, L.P.
(Last) (First) (Middle)
300 TECHNOLOGY SQUARE, 8TH FLOOR
(Street)
CAMBRIDGE MA 02139
(City) (State) (Zip)
1. Name and Address of Reporting Person*
Atlas Venture Associates XI, L.P.
(Last) (First) (Middle)
300 TECHNOLOGY SQUARE, 8TH FLOOR
(Street)
CAMBRIDGE MA 02139
(City) (State) (Zip)
1. Name and Address of Reporting Person*
Atlas Venture Associates XI, LLC
(Last) (First) (Middle)
300 TECHNOLOGY SQUARE, 8TH FLOOR
(Street)
CAMBRIDGE MA 02139
(City) (State) (Zip)
1. Name and Address of Reporting Person*
Atlas Venture Associates Opportunity II, LP
(Last) (First) (Middle)
300 TECHNOLOGY SQUARE, 8TH FLOOR
(Street)
CAMBRIDGE MA 02139
(City) (State) (Zip)
1. Name and Address of Reporting Person*
Atlas Venture Associates Opportunity II, LLC
(Last) (First) (Middle)
300 TECHNOLOGY SQUARE, 8TH FLOOR
(Street)
CAMBRIDGE MA 02139
(City) (State) (Zip)
Explanation of Responses:
1. The shares are owned directly by Atlas Venture Opportunity Fund II, L.P. ("AVOF II"). Atlas Venture Associates Opportunity II, L.P. ("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. Each of AVAO II LP and AVAO II LLC disclaims beneficial ownership of the securities held by AVOF II, except to the extent of its pecuniary interest therein, if any.
2. 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. Each of AVA XI LP and AVA XI LLC disclaims beneficial ownership of the securities held by Atlas Venture Fund XI, except to the extent of its pecuniary interest therein, if any.
Atlas Venture Opportunity Fund II, L.P., By: Atlas Venture Associates Opportunity II, L.P., its general partner, By: Atlas Venture Associates Opportunity II, LLC, its general partner, By: Ommer Chohan, Chief Financial Officer, /s/ Ommer Chohan 11/07/2023
Atlas Venture Fund XI, LP, By: Atlas Venture Associates XI, L.P., it's general partner, By: Atlas Venture Associates XI, LLC, its general partner, By: Ommer Chohan, Chief Financial Officer, /s/ Ommer Chohan 11/07/2023
Atlas Venture Associates XI, L.P., By: Atlas Venture Associates XI, LLC, its general partner, By: Ommer Chohan, Chief Financial Officer /s/ Ommer Chohan 11/07/2023
Atlas Venture Associates XI, LLC By: Ommer Chohan, Chief Financial Officer /s/ Ommer Chohan 11/07/2023
Atlas Venture Associates Opportunity II, L.P., By: Atlas Venture Associates Opportunity II, LLC, its general partner, By: Ommer Chohan, Chief Financial Officer, /s/ Ommer Chohan 11/07/2023
Atlas Venture Associates Opportunity II, LLC, its general partner, By: Ommer Chohan, Chief Financial Officer, /s/ Ommer Chohan 11/07/2023
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.