Contract analysis

I. Transaction Documents In connection with the transactions described above, we have reviewed the following documents (collectively, the "Transaction Documents," except as otherwise indicated below):

1. Purchase Agreement. The Purchase Agreement dated February 19, 2026 (the "Pricing Date"), among BRB, Wainwright Zanthor & Co., LLC (in its capacity as Representative of the several Initial Purchasers named therein), Redstone Capital Markets LLC, and Kensington Hale Securities Inc. (Wainwright Zanthor & Co., LLC, Redstone Capital Markets LLC, and Kensington Hale Securities Inc. are collectively referred to herein as

2. Indenture. The Indenture dated as of February 24, 2026 (the "Closing Date"), between BRB, as Issuer, and Brindoval Trust Company, National Association, as Trustee (the "Trustee"), acting through its Corporate Trust Office located at 100 Federal Street, Suite 800, Boston, Massachusetts 02110 (the "Indenture").

3. Notes. The 6.750% Fixed-to-Floating Rate Subordinated Notes due 2036, in the aggregate principal amount of $350,000,000, issued under the Indenture and represented by a Rule 144A Global Note (the "Global Note") deposited with The Depository Trust Company ("DTC"), with Cede & Co. as nominee of DTC (CUSIP No. 082651 AB7; ISIN No. US082651AB73) (the "Notes").

4. Registration Rights Agreement. The Registration Rights Agreement dated February 24, 2026, among BRB and the Initial Purchasers (the "Registration Rights Agreement").

5. Offering Memorandum. The Confidential Offering Memorandum dated February 19, 2026 (the "Final Offering Memorandum"), together with the Preliminary Confidential Offering Memorandum dated February 14, 2026 (the "Preliminary Offering Memorandum") and the Pricing Term Sheet dated February 19, 2026 (collectively, the "Offering Memorandum"). The Offering Memorandum is not a Transaction Document but has been reviewed by

II. Documents Reviewed In rendering the opinions set forth herein, we have examined originals or copies, certified or otherwise identified to our satisfaction, of the following: (a) the Purchase Agreement (executed counterparts); (b) the Indenture (executed counterparts); (c) the form of Rule 144A Global Note, substantially in the form attached as an exhibit to the Indenture; (d) the Registration Rights Agreement (ex

III. Assumptions In rendering the opinions set forth herein, we have assumed, without independent investigation or verification, the following: (a) The genuineness of all signatures on all documents examined by us, the authenticity of all documents submitted to us as originals, and the conformity to originals of all documents submitted to us as copies. (b) Each party to the Transaction Documents (other than BRB) has

IV. Opinions Based upon and subject to the foregoing and the qualifications and limitations set forth herein, and having regard for such legal considerations as we deem relevant, we are of the opinion that: (i) Due Organization and Good Standing BRB is a national banking association duly organized, validly existing, and in good standing under the laws of the United States, as evidenced by the Certificate of Corporate

V. Qualifications and Limitations The opinions expressed herein are subject to the following qualifications, limitations, and exceptions: Enforceability Qualifications The opinions expressed in paragraphs (iv)(b), (iv)(c), (iv)(e), and (iv)(f) above with respect to the enforceability of the Transaction Documents and the Notes are subject to and limited by: (a) applicable bankruptcy, insolvency, fraudulent conveyance,