The LSE Directory / Hedge funds
Acadian Asset Management is a systematic, quantitative investment manager headquartered in Boston. It builds and runs computer driven models that screen a broad universe of securities to construct equity, credit, equity alternatives, responsible investing and emerging markets strategies, rather than picking positions through traditional fundamental, analyst driven research. The firm states on its own site that it tracks exposure across more than 65,000 traded assets using over 69 terabytes of data and more than 578 million daily observations to feed its models, and it serves institutional clients such as pension funds, endowments and sovereign wealth funds globally, largely through separately managed accounts, commingled funds and sub advised mandates. The firm differentiates itself from discretionary, fundamental managers by running investment decisions almost entirely through data driven, rules based models rather than individual analyst judgment, and from many single strategy quant peers by covering developed, emerging and frontier equity markets plus credit and multi asset overlays under one systematic research process. Its client base is institutional rather than retail, and its stated organizing principles are people, data and clarity, that is, combining quantitative researchers with large proprietary datasets to produce explainable, evidence based portfolios. The firm's research lineage traces to Acadian Financial Research, founded in 1977 by Gary Bergstrom to run quantitative strategies for State Street Corporation. The present firm was established in 1986 by Bergstrom, John Chisholm, Churchill Franklin and Ron Frashure. Ownership passed through United Asset Management from 1992 and Old Mutual Asset Management from 2000, which separated from Old Mutual in 2018 and was renamed BrightSphere Investment Group. In late 2018 Paulson and Co, the hedge fund run by John Paulson, bought a 24.95% stake in BrightSphere from a unit of China's HNA Group, and Paulson later became BrightSphere's board chairman. Between 2018 and 2024 BrightSphere sold six of its seven affiliate managers, keeping Acadian as its sole operating business, then on January 1, 2025 the parent company itself was renamed Acadian Asset Management Inc and its NYSE ticker changed from BSIG to AAMI. Kelly Young, who had been CEO of the Acadian operating business since December 2023, became President and CEO of the renamed parent. Assets under management were about 113 billion dollars at the rebrand announcement in mid 2024 and reached 195.7 billion dollars as of March 31, 2026, up 61% year over year, with a preliminary figure of about 219 billion dollars disclosed for April 30, 2026. Acadian's most recent quarter (Q1 2026) posted record net client cash flows of 21.4 billion dollars, equal to about 12% of beginning AUM, its eighth consecutive quarter of positive net flows, alongside record quarterly management fees of 159.3 million dollars. The company has framed this growth, following the multi-boutique to single-manager simplification completed in 2025, as the opening phase of a broader growth plan it presented to investors in May 2026.
