Multiple highly authoritative and directly relevant sources confirm that IREN Limited was officially announced as being added to the MSCI USA Index. These include a verified press release published on IREN Limited’s investor relations site and its GlobeNewswire distribution, both representing primary evidence from the company itself. Supplementary sources such as MarketWatch, Futunn News, and Stock Titan all corroborate these details, citing the same official announcement. There are no authoritative contradictions identifying this statement as false. While direct evidence for MicroStrategy’s inclusion is secondary, reputable financial media report it in conjunction with IREN within the same MSCI USA Index additions, consistent with how MSCI periodically announces multiple additions in one review cycle. The corroboration across official and reputable financial news channels supports a high-confidence conclusion that both IREN Limited and MicroStrategy were announced as additions to the MSCI USA Index.