13D Filings
Korro Bio, Inc.
KRRO
Amendment
Ownership

9.90%

Total Shares

1,456,677

Issuer CIK

1703647

CUSIP

500946108

Event Date

Mar 9, 2026

Accepted

Mar 12, 2026, 07:32 PM

Reporting Persons (12)
Joint Filing

This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.

NameType% of ClassAggregateSole VotingShared Voting
New Enterprise Associates 17, L.P.
Partnership
9.90%1,435,48701,435,487
NEA Partners 17, L.P.
Partnership
9.90%1,435,48701,435,487
NEA 17 GP, LLC
Other
9.90%1,435,48701,435,487
Forest Baskett
Individual
9.90%1,435,48701,435,487
Ali Behbahani
Individual
9.90%1,456,67721,1901,435,487
Carmen Chang
Individual
9.90%1,435,48701,435,487
Anthony A. Florence, Jr.
Individual
9.90%1,435,48701,435,487
Mohamad H. Makhzoumi
Individual
9.90%1,435,48701,435,487
Edward T. Mathers
Individual
9.90%1,435,48701,435,487
Scott D. Sandell
Individual
9.90%1,435,48701,435,487
Paul Walker
Individual
9.90%1,435,48701,435,487
Rick Yang
Individual
9.90%1,435,48701,435,487
Disclosure Items (7)

Security Title

Common Stock, par value $0.001 per share

Issuer Name

Korro Bio, Inc.

Issuer Address

60 First Street, 2nd Floor, Cambridge, MA, 02141

Filing Persons

New Enterprise Associates 17, L.P. ("NEA 17"); NEA Partners 17, L.P. ("NEA Partners 17"), which is the sole general partner of NEA 17; and NEA 17 GP, LLC ("NEA 17 LLC" and, together with NEA Partners 17, the "Control Entities"), which is the sole general partner of NEA Partners 17; and Forest Baskett ("Baskett"), Ali Behbahani ("Behbahani"), Carmen Chang ("Chang"), Anthony A. Florence, Jr. ("Florence"), Mohamad H. Makhzoumi ("Makhzoumi"), Edward T. Mathers ("Mathers"), Scott D. Sandell ("Sandell"), Paul Walker ("Walker"), and Rick Yang ("Yang") (together, the "Managers"). The Managers are the managers of NEA 17 LLC. The persons named in this Item 2 are referred to individually herein as "Reporting Person" and collectively as the "Reporting Persons."

Business Address

The address of the principal business office of NEA 17, each Control Entity and Sandell is New Enterprise Associates, 1954 Greenspring Drive, Suite 600, Timonium, MD 21093. The address of the principal business office of Baskett, Behbahani, Chang, Makhzoumi, Walker and Yang is New Enterprise Associates, 2855 Sand Hill Road, Menlo Park, CA 94025. The address of the principal business office of Florence and Mathers is New Enterprise Associates, 104 5th Avenue, 19th Floor, New York, NY 10011.

Principal Occupation

The principal business of NEA 17 is to invest in and assist growth-oriented businesses located principally in the United States. The principal business of NEA Partners 17 is to act as the sole general partner of NEA 17. The principal business of NEA 17 LLC is to act as the sole general partner of NEA Partners 17. The principal business of each of the Managers is to manage the Control Entities, NEA 17 and a number of affiliated partnerships with similar businesses.

Convictions

During the five years prior to the date hereof, none of the Reporting Persons has been convicted in a criminal proceeding or has been a party to a civil proceeding ending in a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Citizenship

NEA 17 LLC is a limited liability company organized under the laws of the State of Delaware. NEA 17 and NEA Partners 17 are limited partnerships organized under the laws of the State of Delaware. Each of the Managers is a United States citizen.

On March 9, 2026, the Issuer entered into a subscription agreement (the "Subscription Agreement") with a number of institutional accredited investors, including NEA 17, pursuant to which the Issuer agreed to issue and sell to the investors in a private placement (the "2026 Private Placement") (i) an aggregate of 4,501,928 shares of Common Stock and (ii) pre-funded warrants to purchase an aggregate of 3,148,836 shares of Common Stock (the "Pre-Funded Warrants"). The 2026 Private Placement closed on March 10, 2026. In connection with the closing, NEA 17 purchased (i) 207,100 shares of Common Stock at a purchase price of $11.11 per share and (ii) Pre-Funded Warrants to purchase 242,945 shares of Common Stock (the "NEA 17 Pre-Funded Warrants") at a purchase price of $11.109 per Pre-Funded Warrant with an exercise price of $0.001 per underlying share of Common Stock. The exercise price of each Pre-Funded Warrant is subject to customary adjustments. The Pre-Funded Warrants are exercisable at the option of the holder at any time after their issuance; provided that the Pre-Funded Warrants carry a limitation on exercise if such exercise would cause the number of shares of Common Stock owned by the holder (together with its affiliates and certain other related parties) to exceed 9.99% of the total number of shares of Common Stock, which percentage may be increased or decreased at the option of the holder upon 61 days' prior notice, not to exceed 19.99% (the "Beneficial Ownership Limitation"). NEA 17 now owns a total of 1,297,893 shares of Common Stock and a right, upon exercise of the NEA 17 Pre-Funded Warrants and taking into account the Beneficial Ownership Limitation and the Behbahani Option Shares, to purchase up to 137,594 shares of Common Stock (the "Exercisable Shares") for a total deemed ownership of 1,435,487 shares of Common Stock (the "NEA 17 Shares"). The working capital of NEA 17 is the source of the funds for the purchase of the NEA 17 Shares. No part of the purchase price of the NEA 17 Shares is represented by funds or other consideration borrowed or otherwise obtained for the purpose of acquiring, holding, trading or voting the NEA 17 Shares. The foregoing description of the Subscription Agreement and the terms and conditions of the securities issued thereunder is qualified in its entirety by reference to the full text of the Subscription Agreement, a copy of which is attached as Exhibit 10.1 to the Issuer's Form 8-K filed with the Securities and Exchange Commission (the "SEC") on March 9, 2026 (the "Form 8-K") and incorporated herein by reference.

NEA 17 acquired the NEA 17 Shares for investment purposes. Information with respect to the 2026 Private Placement set forth in Item 3 above is incorporated herein by reference to the extent responsive to this Item 4. Subject to the Registration Rights Agreement, the 2024 Registration Rights Agreement and the 2026 Registration Rights Agreement (as defined below) and depending on market conditions, its continuing evaluation of the business and prospects of the Issuer and other factors, NEA 17 and the other Reporting Persons may dispose of or acquire additional shares of the Issuer. Except as set forth above, none of the Reporting Persons has any present plans which relate to or would result in: (a) The acquisition by any person of additional securities of the Issuer, or the disposition of securities of the Issuer; (b) An extraordinary corporate transaction, such as a merger, reorganization or liquidation, involving the Issuer or any of its subsidiaries; (c) A sale or transfer of a material amount of assets of the Issuer or any of its subsidiaries; (d) Any change in the present board of directors or management of the Issuer, including any plans or proposals to change the number or term of directors or to fill any existing vacancies on the board; (e) Any material change in the present capitalization or dividend policy of the Issuer; (f) Any other material change in the Issuer's business or corporate structure; (g) Changes in the Issuer's charter, bylaws or instruments corresponding thereto or other actions which may impede the acquisition of control of the Issuer by any person; (h) Causing a class of securities of the Issuer to be delisted from a national securities exchange or to cease to be authorized to be quoted in an inter-dealer quotation system of a registered national securities association; (i) A class of equity securities of the Issuer becoming eligible for termination of registration pursuant to Section 12(g)(4) of the Securities Exchange Act of 1934; or (j) Any action similar to any of those enumerated above.

Percentage of Class

NEA 17 is the record owner of the NEA 17 Shares. As the general partner of NEA 17, NEA Partners 17 may be deemed to own beneficially the NEA 17 Shares. As the sole general partner of NEA Partners 17, NEA 17 LLC may be deemed to beneficially own the NEA 17 Shares. As members of NEA 17 LLC each of the Managers may be deemed to own beneficially the NEA 17 Shares. As of March 12, 2026, Behbahani is the record owner of options to purchase 21,190 shares of Common Stock exercisable within 60 days (the "Behbahani Option Shares"). Each Reporting Person disclaims beneficial ownership of the NEA 17 Shares other than those shares which such person owns of record. The percentage of outstanding Common Stock of the Issuer which may be deemed to be beneficially owned by each Reporting Person is set forth on Line 13 of such Reporting Person's cover sheet. Such percentage was calculated based on 14,560,165 outstanding shares of Common Stock, which is the sum of (i) 14,422,571 shares of Common Stock reported by the Issuer to be outstanding as of March 10, 2026 in the Issuer's Form 10-K, filed with the SEC on March 12, 2026 and (ii) the Exercisable Shares. The percentage set forth on the cover sheet for Behbahani is calculated based on the shares described in the preceding sentence plus the Behbahani Option Shares.

Number of Shares

Regarding the number of shares as to which such person has: (i) sole power to vote or to direct the vote: See line 7 of cover sheets (ii) shared power to vote or to direct the vote: See line 8 of cover sheets (iii) sole power to dispose or to direct the disposition: See line 9 of cover sheets (iv) shared power to dispose or to direct the disposition: See line 10 of cover sheets.

Transactions

Except as set forth in Item 3 above, none of the Reporting Persons has effected any transaction in the last 60 days.

Shareholders

No other person is known to have the right to receive or the power to direct the receipt of dividends from, or any proceeds from the sale of, Common Stock beneficially owned by any of the Reporting Persons.

Date of 5% Ownership

Not applicable.

Information with respect to the 2026 Private Placement set forth in Item 3 above is incorporated herein by reference to the extent responsive to this Item 6. In connection with the 2026 Private Placement and pursuant to the terms of the Subscription Agreement, on March 9, 2026, the Issuer, NEA 17 and other investors party to the Subscription Agreement entered into a registration rights agreement (the "2026 Registration Rights Agreement"), pursuant to which the Issuer agreed to provide certain registration rights with respect to the Registrable Securities (as defined in the 2026 Registration Rights Agreement) under the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder, and applicable state securities laws. A copy of the 2026 Registration Rights Agreement is attached as Exhibit 10.2 to the Form 8-K and incorporated herein by reference.

Exhibit 1 - Agreement regarding filing of joint Schedule 13D. Exhibit 2 - Power of Attorney regarding filings under the Securities Exchange Act of 1934, as amended.