Sixteen New Stocks Added to Bloomberg 500 Index Amid Semi-Annual Reconstitution.

Wednesday, Aug 27, 2025 4:36 pm ET1min read

Bloomberg 500 Index has undergone semi-annual reconstitution, adding sixteen new securities to the index, including Affirm Holdings, Astera Labs, and SoFi Technologies. The index now reflects a market capitalization of $58.19 trillion. The additions span various sectors, with Technology being the most represented. Changes to the index are based on a rules-based design, mitigating potential biases and evaluating members systematically.

The Bloomberg 500 (B500) Index has undergone its semi-annual reconstitution, adding 16 new securities to its ranks. The changes, effective prior to the open of trading on Thursday, September 11, reflect the index's commitment to transparency and representativeness. The B500, which contains the 500 most highly capitalized US companies weighted by float market cap, now includes Affirm Holdings, Inc. (AFRM), Astera Labs, Inc. (ALAB), The Carlyle Group, Inc. (CG), and other notable additions. These new members span various sectors, with Technology being the most represented, followed by Financial and Industrials.

The additions include companies like Affirm Holdings, a leading point-of-sale lending platform, and Astera Labs, a biotech company. The Carlyle Group, a private equity firm, and Nutanix, a cloud computing company, also join the index. These new members highlight the B500's focus on innovation and growth, as well as its ability to adapt to market changes.

The B500's semi-annual reconstitution is part of its rules-based index design, which aims to mitigate potential biases and systematically evaluate potential members. This approach allows for earlier additions of qualified companies compared to indices using a committee-based approach.

The B500 Index now reflects a market capitalization of $58.19 trillion, demonstrating its continued significance in the US equity market. The index is available to Terminal clients and offers a comprehensive range of research and methodology on Bloombergindices.com.

References:
[1] https://www.prnewswire.com/news-releases/bloomberg-500-b500-index-adds-sixteen-securities-following-semi-annual-reconstitution-302540344.html

Sixteen New Stocks Added to Bloomberg 500 Index Amid Semi-Annual Reconstitution.

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