UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2020March 31, 2021

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 000-51274

FRONTIER FUNDS

FRONTIER DIVERSIFIED FUND;

FRONTIER LONG/SHORT COMMODITY FUND;

FRONTIER MASTERS FUND; 

FRONTIER BALANCED FUND;

FRONTIER SELECT FUND;

FRONTIER GLOBAL FUND;

FRONTIER HERITAGE FUND

(Exact Name of Registrant as specified in Its Charter)

Registrant’s Telephone Number, Including Area Code: (303) 454-5500

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

Title of Each Class

Frontier Diversified Fund Class 1, Class 2 and Class 3 Units;

Frontier Long/Short Commodity Fund Class 2, Class 3, Class 1a, Class 2a and Class 3a Units;

Frontier Masters Fund Class 1, Class 2 and Class 3 Units;

Frontier Balanced Fund Class 1, Class 1AP, Class 2, Class 2a and Class 3a Units;

Frontier Select Fund Class 1, Class 1AP, and Class 2 Units;

Frontier Global Fund Class 1 Class 1AP, and Class 2 Units;

Frontier Heritage Fund Class 1, Class 1AP, and Class 2 Units

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒