As filed with the Securities and Exchange Commission on September 9, 2026

Registration No. 333-293535

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

POST-EFFECTIVE AMENDMENT TO FORM S-1
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

RICHTECH ROBOTICS INC.
(Exact name of registrant as specified in its charter)

2975 Lincoln Rd
Las Vegas, NV 89115
(866) 236-3835

(Address, including zip code, and telephone number, including area code, of Registrant’s principal executive offices)

Zhenwu (Wayne) Huang
C/O RICHTECH ROBOTICS INC.
2975 Lincoln Rd,
Las Vegas, NV 89115
(866) 236-3835

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this registration statement.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☒

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 7(a)(2)(B) of the Securities Act. ☐

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such date as the Commission, acting pursuant to Section 8(a), may determine.

EXPLANATORY NOTE 

This Post Effective Amendment to the Registration Statement on Form S-1 of Richtech Robotics Inc. (the “Company”) (File No. 333-293535) is being filed as an exhibit-only filing solely to file the consent of Bush & Associates CPA LLC (Exhibit 23.1). Accordingly, this Amendment consists only of the facing page, this explanatory note, the signature pages to the Registration Statement, and the referenced exhibit. The prospectus and the balance of Part II of the Registration Statement are unchanged hereby and have been omitted. 

SIGNATURES

Pursuant to the requirements of the Securities Act, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized on September 9, 2026.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.

II-3

ATTACHMENTS / EXHIBITS

CONSENT OF BUSH & ASSOCIATES CPA, INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM