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BlackRock ETF Trust II

03/05/2026 | Press release | Distributed by Public on 03/05/2026 15:31

Prospectus by Investment Company (Form 497)

BLACKROCK ETF TRUST II

iShares Mortgage-Backed Securities Active ETF

(the "Fund")

Supplement dated March 5, 2026 to the Prospectus and Statement of Additional Information of the Fund, each dated January 26, 2026, as supplemented to date

Effective as of April 30, 2026, the Fund's fiscal year end is changed from September 30 to April 30. The change will be reflected in the Fund's reports on Form N-CSR for the period of October 1, 2025 to April 30, 2026.

Shareholders should retain this Supplement for future reference.

PRSAI-MBBA-0326SUP

BlackRock ETF Trust II published this content on March 05, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on March 05, 2026 at 21:31 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]