State Street Corporation announced on March 23 2026 that it will serve as the service provider for Dimensional Fund Advisors’ newly approved ETF share‑class structure, the first of its kind in the United States. The arrangement allows Dimensional to offer ETF share classes within its actively‑managed mutual fund lineup under the U.S. Securities and Exchange Commission’s final exemptive relief, enabling investors to trade the shares on exchanges while the funds remain open‑end mutual funds.
The SEC granted Dimensional final exemptive relief on November 17 2025 after a July 2023 filing and subsequent amendments. The approval permits open‑end funds to offer an ETF share class alongside existing mutual‑fund share classes in the same portfolio, a structure that became broadly possible after Vanguard’s patent for ETF share classes in passively‑managed mutual funds expired in 2023. This regulatory breakthrough gives Dimensional a competitive edge by combining the liquidity and tax efficiency of ETFs with the familiar mutual‑fund framework.
State Street will provide custody, fund accounting, ETF basket creation, create‑redeem order management, settlement, transfer agency, and reporting services. The partnership expands State Street’s ETF servicing portfolio and adds recurring fee revenue, reinforcing its Alpha platform strategy of integrating front‑to‑back office solutions to deepen client relationships.
Financial context underscores the significance of the deal. In Q4 2025, State Street reported earnings per share of $2.97 versus analysts’ estimate of $2.83, a beat of $0.14, and revenue of $3.67 billion versus an estimate of $3.62 billion, a beat of $50 million. The company’s assets under custody stood at $53.8 trillion and assets under management at $5.7 trillion as of December 31 2025. Dimensional’s global assets under management crossed $1 trillion on February 9 2026, and its ETFs held $225 billion in assets as of September 30 2025. The partnership positions State Street to capture a share of the growing ETF market and provides Dimensional with a scalable, cost‑efficient platform for its active ETF offerings.
Strategically, the deal aligns with State Street’s goal of expanding into hybrid product categories that blend mutual‑fund and ETF features. For Dimensional, the share‑class structure is a first‑mover advantage in the U.S., offering investors tax efficiency, lower costs, and greater flexibility. The partnership may spur other asset managers to adopt similar structures, potentially reshaping the active‑management and ETF landscape.
Joerg Ambrosius, President of Investment Services at State Street, said, “We’re pleased to support Dimensional Fund Advisors as they implement ETF share classes under the SEC’s new framework. Our global experience with ETF share classes and our robust operational infrastructure uniquely position us to support Dimensional’s important launch. Dimensional’s prior selection of State Street to support the launch of its UCITS ETF range in Europe reflects the strength of our long‑standing global partnership.” Gerard O’Reilly, Co‑CEO and Co‑CIO of Dimensional, added, “Broader adoption of the share class structure can offer millions of American investors potential benefits of increased tax efficiency and cost savings from economies of scale. State Street’s readiness and ETF servicing expertise have been instrumental in preparing for this launch.”
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