
August 31, 2026
VIA EDGAR TRANSMISSION
U.S. Securities and Exchange Commission
Division of Investment Management
100 F Street, N.E.
Washington, D.C. 20549
| RE: | Themes ETF Trust (File Nos. 811-23872 and 333-271700) |
Ladies and Gentlemen:
Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, and the regulations thereunder, the Trust hereby certifies that the form of Prospectus and Statement of Additional Information that would have been filed under Rule 497(b) or (c) would not have differed from those contained in Post-Effective Amendment No. 312 to the Trust’s Registration Statement on Form N-1A, filed on July 21, 2026 for the following series:
Leverage Shares 2X Long Memory Daily ETF
If you have any questions concerning the foregoing, please contact the undersigned at (513) 708-6391 or Tina.Bloom@Practus.com.
Regards,
| /s/ Tina H. Bloom | |
| On behalf of Practus, LLP |

TINA H. BLOOM ● PARTNER
11300 Tomahawk Creek Pkwy ● Ste. 310 ● Leawood, KS 66211 ● p: 513.708.6391
Practus, LLP ● Tina.Bloom@Practus.com ● Practus.com