Exhibit 4.3
Consent of Independent Registered Public Accounting Firm
We have issued our report dated July 15, 2022, with respect to the financial statement of SmartTrust 577 contained in Amendment No. 1 to the Registration Statement on Form S-6 (File No. 333-264357) and related Prospectus. We consent to the use of the aforementioned report in the Registration Statement and Prospectus, and to the use of our name as it appears under the caption “Independent Registered Public Accounting Firm”.
/s/ Grant Thornton LLP
Chicago, Illinois
July 15, 2022