0001722388 2026-07-13 2026-07-13 0001722388 iinc:S000103659Member 2026-07-13 2026-07-13 false Tidal Trust III N-1A 0001722388 497 2026-07-13 <p id="xdx_A81_eoef--SupplementToProspectusTextBlock_zBLxSzNJMx95" style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><b>Supplement to the Summary Prospectus</b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><b>dated June 22, 2026, and </b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><b>Prospectus and Statement of Additional Information (“SAI”)</b></p> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><b>each dated <span id="xdx_903_eoef--ProspectusDate_c20260713__20260713_zHOwm2rJrvR">June 16, 2026</span></b></p> <table cellpadding="0" cellspacing="0" style="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif"> <tr style="vertical-align: bottom"> <td style="border-bottom: black 1pt solid; width: 100%; font-size: 11pt; text-align: center"> </td></tr> </table> <p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><i> </i></p> 2026-06-16 <p id="xdx_A8C_eoef--PerformanceNarrativeTextBlock_zR98fppzEasl" style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Effective immediately, all references to the Fund’s website address in the Summary Prospectus, Prospectus and SAI are changed to: <span id="xdx_902_eoef--PerformanceAvailabilityWebSiteAddress_c20260713__20260713__dei--LegalEntityAxis__custom--S000103659Member_zKQ3rI0bnTed">www.iinc-etf.com</span>.</p> www.iinc-etf.com