SEC Form 424I filed by iShares Bitcoin Trust ETF

Filed Pursuant to Rule 424(i)
Registration No. 333-272680

PROSPECTUS SUPPLEMENT PURSUANT TO RULE 424(i)

FOR FISCAL YEAR ENDED DECEMBER 31, 2025

(to Prospectus dated August 8, 2024)

iShares® Bitcoin Trust ETF

Calculation of Registration Fees Pursuant to Rule 457(u)

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, 2025. The calculation of the registration fee is included in an exhibit hereto.