FRONTIER FUNDS

Exhibit 32.5

CERTIFICATION PURSUANT TO 

18 U.S.C.§1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of the Frontier Winton Fund, a Series of Frontier Funds on Form 10-Q for the period ended March 31, 2018, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned hereby certifies, to the best of his knowledge:

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

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

/s/ Patrick J. Kane

Patrick J. Kane

Chairman and Chief Financial Officer of Frontier

Fund Management LLC, the Managing Owner of

Frontier Funds

May 15, 2018