Item 8.01 Other Events. Net Asset Value The net asset value (“ NAV”) per Share as of August 31, 2026, as determined in accordance with the Company’s valuation policy, is set forth below. NAV as of August 31, 2026 ───────────────────────────────────────────────── Class J Shares $25.48 As of August 31, 2026, the Company's aggregate NAV was approximately $695.8 million. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. MACQUARIE INFRASTRUCTURE INCOME OPPORTUNITIES FUND Date: October 5, 2026 By: /s/ Maximilian Cervelli Name: Maximilian Cervelli Title: Chief Financial Officer