United States 12 Month Natural Gas Fund (UNL) 424I Prospectus supplement

Filed Pursuant to Rule 424(i)

Registration No. 333-263572

PROSPECTUS SUPPLEMENT PURSUANT TO RULE 424(i)

FOR FISCAL YEAR ENDING DECEMBER 31, 2022

(to Prospectus dated April 26, 2022)

United States 12 Month Natural Gas Fund, LP (the “Fund”)

This prospectus supplement filed pursuant to Rule 424(i) of the Securities Act of 1933, as amended (the “Securities Act”), sets forth the registration fee due under Rule 456(d) of the Securities Act for the fiscal year ended December 31, 2022. The calculation of the registration fee is included in an exhibit hereto.