Post-Effective Amendment to Post-Effective Amendment by Investment Company (Form 485BXT)

☒ This post-effective amendment designates a new effective date for a previously filed post-effective amendment

Parts A, B and C filed in Post-Effective Amendment No. 188 to the Registration Statement of NEOS ETF Trust on behalf of NEOS Boosted S&P 500® High Income ETF and NEOS Boosted Nasdaq-100® High Income ETF as filed with the Securities and Exchange Commission pursuant to Rule 485(a) under the Securities Act of 1933 on September 3, 2025 (Accession Number 0001999371-25-012465), are herein incorporated by reference. This filing is being made pursuant to Rule 485(b)(1)(iii) under the Securities Act of 1933 to extend the effectiveness of the Registration Statement until November 19, 2025.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirement for effectiveness of this Registration Statement under rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the city of Westport, and State of Connecticut, on the 13th day of November 2025.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed below by the following person in the capacities and on the date indicated.

* Attorney-in-Fact - Signed pursuant to a Power of Attorney dated March 26, 2024 for Ms. Sharon Cheever, and Mr. Richard Keary; a Power of Attorney dated March 27, 2024 for Mr. Robert Sherry; and a Power of Attorney dated March 28, 2024 for Mr. John Jacobs; and filed with Registrant's registration statement on Form N-1A dated April 18, 2024 and herein incorporated by reference.