Exhibit 32.1

Certification of CEO

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

In connection with the Quarterly Report of BlackBerry Limited (the “Registrant”) on Form 10-Q for the quarter ended November 30, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), John Giamatteo, as Chief Executive Officer of the Registrant, hereby certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

    (1)    The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

    (2)    The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

/s/ John Giamatteo

Name: John Giamatteo

Title:   Chief Executive Officer

Date: December 20, 2024