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Korro Bio (KRRO) CSO reports 25,797 shares after 7,500-share RSU grant

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Vincent Loic A reported acquisition or exercise transactions in this Form 4 filing.

Korro Bio, Inc. Chief Scientific Officer Vincent Loic A received an equity award covering 7,500 shares of common stock, issuable upon settlement of restricted stock units (RSUs) granted under the 2023 Stock Option and Incentive Plan. These RSUs vest 50% on July 15, 2027 and 50% on July 15, 2028, subject to maintaining a continuous Service Relationship. Following this grant, he reports direct ownership of 25,797 shares, including 18,358 unvested RSU-based shares scheduled to vest 10,858 on December 15, 2026, 3,750 on July 15, 2027, and 3,750 on July 15, 2028.

Positive

  • None.

Negative

  • None.
Insider Vincent Loic A
Role Chief Scientific Officer
Type Security Shares Price Value
Grant/Award Common Stock 7,500 $0.00 --
Holdings After Transaction: Common Stock — 25,797 shares (Direct)
Footnotes (1)
  1. Represents shares of common stock issuable upon settlement of a restricted stock unit (RSU) granted under the Issuer's 2023 Stock Option and Incentive Plan (the 2023 Plan) that will vest as follows: 50% on July 15, 2027 and 50% on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date. Includes 18,358 shares of common stock issuable upon settlement of restricted stock units (RSUs) that remain unvested, consisting of 10,858 shares that will vest on December 15, 2026, 3,750 shares that will vest on July 15, 2027, and 3,750 shares that will vest on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date.
RSU grant size 7500.0000 shares Shares of common stock issuable upon settlement of RSUs granted on July 15, 2026
Post-transaction holdings 25797.0000 shares Total direct common stock ownership reported after the RSU grant
Unvested RSU-based shares 18,358 shares Shares of common stock issuable upon settlement of unvested RSUs included in reported holdings
Vesting tranche 1 10,858 shares Unvested RSU shares scheduled to vest on December 15, 2026
Vesting tranche 2 3,750 shares Unvested RSU shares scheduled to vest on July 15, 2027
Vesting tranche 3 3,750 shares Unvested RSU shares scheduled to vest on July 15, 2028
restricted stock unit (RSU) financial
"issuable upon settlement of a restricted stock unit (RSU) granted under the Issuer's 2023"
A restricted stock unit (RSU) is a promise from a company to give an employee company shares (or cash equal to their value) at a future date if certain conditions are met, such as staying with the company or hitting performance targets. For investors, RSUs matter because when they convert into actual shares they increase the number of shares available and can create selling pressure as employees cash out—think of them as a future paycheck paid in company stock.
2023 Stock Option and Incentive Plan financial
"RSU granted under the Issuer's 2023 Stock Option and Incentive Plan (the 2023 Plan)"
Service Relationship financial
"subject to the reporting person maintaining a continuous Service Relationship through each such date"

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What equity award did Korro Bio (KRRO) grant to Vincent Loic A?

Korro Bio granted its Chief Scientific Officer an RSU-based equity award covering 7,500 shares of common stock. These shares are issuable upon settlement of restricted stock units granted under the company’s 2023 Stock Option and Incentive Plan.

How many Korro Bio (KRRO) shares does Vincent Loic A hold after this Form 4 transaction?

After the reported grant, Vincent Loic A directly reports ownership of 25,797 shares of Korro Bio common stock. This total includes both already vested shares and shares issuable upon settlement of unvested restricted stock units.

When do the newly granted RSUs in Korro Bio (KRRO) vest?

The newly granted RSUs covering 7,500 shares vest in two equal tranches: 50% on July 15, 2027 and 50% on July 15, 2028, in each case subject to maintaining a continuous Service Relationship.

How many unvested RSUs does the Korro Bio (KRRO) CSO have outstanding and what is the schedule?

The Chief Scientific Officer has 18,358 shares of common stock issuable from unvested RSUs. These are scheduled to vest in tranches of 10,858 shares on December 15, 2026, and 3,750 shares on both July 15, 2027 and July 15, 2028.

Under which plan were the latest Korro Bio (KRRO) RSUs granted?

The RSUs relating to 7,500 shares of Korro Bio common stock were granted under the company’s 2023 Stock Option and Incentive Plan, which governs the terms, including vesting and Service Relationship conditions.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Vincent Loic A

(Last)(First)(Middle)
C/O KORRO BIO, INC.
60 FIRST STREET, 2ND FLOOR, SUITE 250

(Street)
CAMBRIDGE MASSACHUSETTS 02141

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Korro Bio, Inc. [ KRRO ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Scientific Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/15/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock07/15/2026A7,500(1)A$0.0025,797(2)D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Represents shares of common stock issuable upon settlement of a restricted stock unit (RSU) granted under the Issuer's 2023 Stock Option and Incentive Plan (the 2023 Plan) that will vest as follows: 50% on July 15, 2027 and 50% on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date.
2. Includes 18,358 shares of common stock issuable upon settlement of restricted stock units (RSUs) that remain unvested, consisting of 10,858 shares that will vest on December 15, 2026, 3,750 shares that will vest on July 15, 2027, and 3,750 shares that will vest on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date.
/s/ Jeffrey Cerio, Attorney-in-fact07/17/2026
** Signature of Reporting PersonDate
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 4 (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.
* Form 4: SEC 1474 (03-26)