MBX Biosciences, Inc.
8.10%
3,619,474
1776111
55287L101
Nov 5, 2025
Nov 10, 2025, 05:08 PM
Reporting Persons (12)
This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.
| Name | Type | % of Class | Aggregate | Sole Voting | Shared Voting |
|---|---|---|---|---|---|
| New Enterprise Associates 17, L.P. | Partnership | 8.10% | 3,614,486 | 0 | 3,614,486 |
| NEA Partners 17, L.P. | Partnership | 8.10% | 3,614,486 | 0 | 3,614,486 |
| NEA 17 GP, LLC | Other | 8.10% | 3,614,486 | 0 | 3,614,486 |
| Forest Baskett | Individual | 8.10% | 3,614,486 | 0 | 3,614,486 |
| Ali Behbahani | Individual | 8.10% | 3,614,486 | 0 | 3,614,486 |
| Carmen Chang | Individual | 8.10% | 3,614,486 | 0 | 3,614,486 |
| Anthony A. Florence, Jr. | Individual | 8.10% | 3,614,486 | 0 | 3,614,486 |
| Mohamad H. Makhzoumi | Individual | 8.10% | 3,614,486 | 0 | 3,614,486 |
| Edward T. Mathers | Individual | 8.10% | 3,619,474 | 4,988 | 3,614,486 |
| Scott D. Sandell | Individual | 8.10% | 3,614,486 | 0 | 3,614,486 |
| Paul Walker | Individual | 8.10% | 3,614,486 | 0 | 3,614,486 |
| Rick Yang | Individual | 8.10% | 3,614,486 | 0 | 3,614,486 |
Disclosure Items (7)
Common Stock, par value $0.0001 per share
MBX Biosciences, Inc.
11711 N. Meridian Street, Carmel, IN, 46032
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."
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.
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.
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.
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.
Not applicable.
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. Each Reporting Person disclaims beneficially ownership of the NEA 17 Shares other than those shares which such person owns of record. As of November 10, 2025, Mathers is the record owner of options to purchase 4,988 shares of Common Stock (the "Mathers Option Shares"), exercisable within 60 days. 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 Peron's cover sheet. Such percentage was calculated based on 44,902,302 shares of Common Stock reported by the Issuer to be outstanding as of November 3, 2025 on the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 6, 2025. The percentage set forth on the cover sheet for Mathers is calculated based on the shares described in the preceding sentence plus the Mathers Option 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.
None of the Reporting Persons have effected any transaction in the last 60 days.
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.
Not applicable.
Not applicable.
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.