Supplemental Prospectus (Form 424B7)

Name of Selling Security Holder

Git Capital Holdings LLC (3) (4)

Henrique Vasconcelos Dubugras (5) (6)

Benjamin Gammell (7) (8)

All other selling security holders (9) (10) (11)

Less than 1%.

Based on 616,019,481 shares of our common stock outstanding as of June 8, 2026.

Assumes the sale of all shares offered by the selling security holders pursuant to this prospectus supplement.

The sole manager and owner of Git Capital Holdings LLC is Pedro Franceschi, who is an employee of Capital One and was the co-founder, chief executive officer and a director of Brex prior to its acquisition by Capital One. The address of Git Capital Holdings LLC is PO Box 2652, Menlo Park, CA 94026, USA.

The sole manager and owner of Git Capital Holdings LLC, Pedro Franceschi, may enter into a credit facility with Goldman Sachs Bank (any such facility, the "Franceschi Credit Facility"), pursuant to which Mr. Franceschi would pledge up to 688,346 shares of our common stock that are being offered subject to this prospectus supplement as security for Mr. Franceschi's obligations under the Franceschi Credit Facility. Upon a default by Mr. Franceschi under the Franceschi Credit Facility, Goldman Sachs Bank, Goldman Sachs & Co. LLC ("Goldman Sachs & Co.") and/or any affiliate thereof, may be a selling security holder hereunder and may sell the applicable shares of our common stock offered under this prospectus supplement. Goldman Sachs & Co., an affiliate of Goldman Sachs Bank and a U.S. registered broker-dealer, may be deemed to be an "underwriter" within the meaning of the Securities Act of 1933, as amended (the "Securities Act"). To our knowledge and based upon information we received from Goldman Sachs Bank, the shares would be pledged in the ordinary course of business and, as of the date hereof, Goldman Sachs Bank had no agreements or understandings, directly or indirectly, with any person (including any affiliate of Goldman Sachs Bank who is a registered broker-dealer) to distribute the shares.

Consists of (i) 502,080 shares held by Henrique Vasconcelos Dubugras and (ii) 882 shares held by Ruby Capital Holdings LLC, of which Henrique Vasconcelos Dubugras is the sole owner. Mr. Dubugras was the chairman, and previously served as co-chief executive officer, of Brex prior to its acquisition by Capital One. The address of Mr. Dubugras is PO Box 2652, Dept 1650 Menlo Park, CA 94026 USA.

Pursuant to a credit facility (the "Dubugras Credit Facility") by and between Mr. Dubugras and Goldman Sachs Bank, 502,080 shares of our common stock that are being offered subject to this prospectus supplement have been pledged by Mr. Dubugras to Goldman Sachs Bank as security for Mr. Dubugras' obligations under the Dubugras Credit Facility. Upon a default by Mr. Dubugras under the Dubugras Credit Facility, Goldman Sachs Bank, Goldman Sachs & Co. and/or any affiliate thereof, may be a selling security holder hereunder and may sell the applicable shares of our common stock offered under this prospectus supplement. Goldman Sachs & Co., an affiliate of Goldman Sachs Bank and a U.S. registered broker-dealer, may be deemed to be an "underwriter" within the meaning of the Securities Act. To our knowledge and based upon information we received from Goldman Sachs Bank, the shares were pledged in the ordinary

Benjamin Gammell is an employee of Capital One and previously served as chief financial officer and president of Brex prior to its acquisition by Capital One. Mr. Gammell is also a registered representative of Brex Treasury LLC, a registered broker-dealer. Mr. Gammell's address is 2 Belgrave Ave, San Francisco, CA 94117.

Mr. Gammell may enter into a credit facility with Goldman Sachs Bank (any such facility, the "Gammell Credit Facility"), pursuant to which Mr. Gammell would pledge up to 349,206 shares of our common stock that are being offered subject to this prospectus supplement as security for Mr. Gammell's obligations under the Gammell Credit Facility. Upon a default by Mr. Gammell under the Gammell Credit Facility, Goldman Sachs Bank, Goldman Sachs & Co. and/or any affiliate thereof, may be a selling security holder hereunder and may sell the applicable shares of our common stock offered under this prospectus supplement. Goldman Sachs & Co., an affiliate of Goldman Sachs Bank and a U.S. registered broker-dealer, may be deemed to be an "underwriter" within the meaning of the Securities Act. To our knowledge and based upon information we received from Goldman Sachs Bank, the shares would be pledged in the ordinary course of business and, as of the date hereof, Goldman Sachs Bank had no agreements or understandings, directly or indirectly, with any person (including any affiliate of Goldman Sachs Bank who is a registered broker-dealer) to distribute the shares.

Selling security holders included in this row who have or had any position (including employment positions), office or other material relationship with Brex or its subsidiaries, in each case within the past three years, beneficially owned 557,720 shares of our common stock prior to this offering, representing less than 1% of our outstanding shares of common stock, are offering 405,895 shares of our common stock and will beneficially own 151,825 shares of our common stock upon completion of this offering, representing less than 1% of our outstanding shares of common stock.

Selling security holders included in this row who are or are affiliated with a registered broker-dealer beneficially owned 570,962 shares of our common stock prior to this offering, representing less than 1% of our outstanding shares of common stock, are offering 419,137 shares of our common stock and will beneficially own 151,825 shares of our common stock upon completion of this offering, representing less than 1% of our outstanding shares of common stock. The shares being offered herein by such selling security holders were acquired in the ordinary course of business, and at the time of acquisition, the selling stockholders had no agreements or understandings, directly or indirectly, with any person to distribute the securities.

This row includes additional selling security holders who were made known to us based upon written representations from such selling security holders. Other than the inclusion of such additional selling security holders, this row does not reflect any other changes, including any shares of our common stock that may have been sold in the offering since the date of the initial prospectus supplement.