FBP · Annual Report (Form 10-K) · Filed February 27, 2026

First Bancorp — 10-K exhibit

exhibit321.htm

First Bancorp on Boardroom Alpha

exhibit321

EXHIBIT

32.1

CERTIFICATION

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(Subsections (a) and (b) of Section 1350, Chapter 63 Title 18,

United States Code)

Pursuant to

Section 906 of

the Sarbanes-Oxley

Act of 2002

(subsections (a) and

(b) of Section

1350, Chapter 63

of Title

18,

United States Code), the undersigned officer of

First BanCorp., a Puerto Rico

corporation (the “Company”), does hereby certify, to such

officer’s knowledge, that:

The Annual Report

on Form 10-K

for the year

ended December

31, 2025 (the

“Form 10-K”) of

the Company fully

complies

with the

requirements of

section 13(a)

or 15(d)

of the

Securities Exchange

Act of

1934 and

information contained

in the

Form 10-K

fairly presents, in all material respects, the financial condition and results of

operations of the Company.

Date: February 27, 2026

/s/ Aurelio Alemán

Name: Aurelio Alemán

Title: President and Chief Executive Officer

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