Dimensional consolidates $250 billion lineup into ETF share classes

Dimensional Fund Advisors is merging $250 billion in assets into a unified ETF share class structure, cutting fees by an average of 9% and accelerating the industry's shift away from traditional mutual funds.

Dimensional Fund Advisors is merging eight U.S. equity ETFs into mutual funds with identical mandates, combining $100 billion in ETF assets and $150 billion in mutual funds under a single share class structure, the firm announced this week.

"We have long championed broader availability of ETF share classes, recognizing the potential tax efficiency, cost savings, and economies of scale this structure can offer," said Gerard O'Reilly, co-CEO and co-CIO of Dimensional.

The consolidation brings together roughly $250 billion in market value. Dimensional will lower targeted management fees across affected funds by an asset-weighted average of 9% starting Nov. 1, 2026. The Dimensional U.S. Core Equity 2 ETF (DFAC) will maintain its ticker while absorbing benefits from the broader asset pool.

The move follows Dimensional becoming the first active manager to secure SEC exemptive relief to operate an ETF share class within an existing mutual fund structure late last year. The shift signals a structural change for the $30 trillion U.S. asset management industry, where ETF share classes let a single underlying pool of securities offer two separate liquid access points — making investment philosophy, not vehicle wrapper, the primary selection criterion.

How the Consolidation Works

The merger affects eight U.S. equity funds. By combining the asset bases, Dimensional achieves economies of scale that lower transaction costs, enhance tax efficiency, and enable more efficient rebalancing. A single portfolio management team will handle operational efforts across the consolidated funds.

Investors gain the flexibility to convert from an ETF class to a mutual fund class or vice versa. "ETF share classes simplify allocation decisions by making investment philosophy the primary consideration when selecting investments, not fund wrappers," O'Reilly said.

The Dimensional conversion is the largest of its kind but not the first. Fidelity launched its first ETF share classes earlier this week, and more than 200 mutual fund-to-ETF conversions have occurred industry-wide, according to VettaFi data. The trend pressures traditional open-ended fund providers to either convert or risk losing market share as advisors and platforms increasingly default to the ETF wrapper.

Operational Hurdles Remain

"Actually getting these products into portfolios will require immense patience," wrote Todd Rosenbluth, head of research at TMX VettaFi, in a note on ETF share classes. "Clearing regulatory hurdles is entirely different from rebuilding operational infrastructure."

The U.S. ETF industry held about $10 trillion in assets as of early 2026, with active ETFs representing a growing share. Dimensional's move demonstrates that active strategies can be delivered in an ETF format at scale, potentially accelerating adoption among other active managers who have been evaluating conversions. The firm's ability to pass cost savings to clients through fee reductions may set a benchmark that competitors will need to match.

This article is for informational purposes only and does not constitute investment advice.