Bio-Techne (TECH) 10-K 2018 FY Annual report

Exhibit 32.1

BIO-TECHNE CORPORATION

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Bio-Techne Corporation (the “Company”) on Form 10-K for the year ended June 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Charles Kummeth, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 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 Company.

/s/ Charles Kummeth

Charles Kummeth

Chief Executive Officer

August 27, 2018