Form 485BXT Direxion Shares ETF Trus

As filed with the Securities and Exchange Commission on September 24, 2026 

1933 Act File No. 333-150525 

1940 Act File No. 811-22201 

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

and/or

(Check appropriate box or boxes.)

DIREXION SHARES ETF TRUST

(Exact name of Registrant as Specified in Charter)

535 Madison Avenue, 37^th Floor

New York, New York 10022

(Address of Principal Executive Office) (Zip Code)

Registrant’s Telephone Number, including Area Code: (646) 572-3390

Angela Brickl

535 Madison Avenue, 37^th Floor

New York, New York 10022

(Name and Address of Agent for Service)

Copy to:

It is proposed that this filing will become effective (check appropriate box)

If appropriate, check the following box:

EXPLANATORY NOTE

Designation of New Effective Date for Previously Filed Amendment

Post-Effective Amendment No.  457 (the “Amendment”) was filed pursuant to Rule 485(a)(2) under the Securities Act of 1933, as amended, on March 6, 2026, and pursuant to Rule 485(a)(2) would become effective on May 20, 2026.

Post-Effective Amendment No. 466 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating June 18, 2026, as the new date upon which the Amendment would become effective.

Post-Effective Amendment No. 475 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating July 7, 2026, as the new date upon which the Amendment would become effective.

Post-Effective Amendment No. 481 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating July 28, 2026, as the new date upon which the Amendment would become effective.

Post-Effective Amendment No. 488 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating August 27, 2026, as the new date upon which the Amendment would become effective.

Post-Effective Amendment No. 501 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating September 25, 2026, as the new date upon which the Amendment would become effective.

This Post-Effective Amendment No.  521 incorporates by reference the information contained in Parts A, B, and C of the Amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, (the “Securities Act”) and the Investment Company Act of 1940, as amended, the Registrant certifies that this Post-Effective Amendment No. 521 to its Registration Statement meets all the requirements for effectiveness pursuant to Rule 485(b) of the Securities Act, and the Registrant has duly caused this Post-Effective Amendment No. 521 to its Registration Statement on Form N-1A to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and the State of New York on September 24, 2026.

Pursuant to the requirements of the Securities Act, this Post-Effective Amendment No. 521 to its Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.