Walgreens Boots Alliance (WBA) 10-Q 2017 Q3 Quarterly report

Exhibit 32.1

CERTIFICATION PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. SECTION 1350)

In connection with the Quarterly Report of Walgreens Boots Alliance, Inc., a Delaware corporation (the "Company"), on Form 10-Q for the quarter ended May 31, 2017 as filed with the Securities and Exchange Commission (the "Report"), I, Stefano Pessina, Chief Executive Officer of the Company, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge:

(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 Company.

/s/ Stefano Pessina

Stefano Pessina

Chief Executive Officer

Dated:  June 29, 2017

A signed original of this written statement required by Section 906 has been provided to Walgreens Boots Alliance, Inc. and will be retained by Walgreens Boots Alliance, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.