Dimensional converts final three ETFs into mutual fund share classes

Monday's NYSE Arca launches included three Dimensional ETFs—the U.S. Core Equity 2 ETF (DFAC), the U.S. Small Cap ETF (DFAS) and the U.S. Targeted Value ETF (DFAT)—that had already been trading for years and kept their tickers after Dimensional merged each one into its matching older mutual fund at the October 2 close, according to the firm. A share class is another version of the same fund, with its own fees and its own way of trading, so holders of the old ETFs now own ETF shares in funds that also offer a mutual fund version; Dimensional said mutual fund investors will see no change to their fund's ticker, name or ID numbers. The three are the second and final batch of an eight-fund conversion, following five other Dimensional ETFs that made the same switch after the September 25 close.

The eight conversions moved roughly $100 billion of ETF assets into older mutual funds that already held $150 billion, according to Dimensional's June 18 announcement, creating about $250 billion in funds that carry both a mutual fund and an ETF share class. Fee cuts across those funds came with the same announcement, and the plan was executed in the last week of September and the first week of October.

ETF Trends reports that no issuer appears to have folded existing ETFs into mutual funds as share classes before, which would make Dimensional the first to run the permission in that direction. The permission is not new; the firm says it became the first active manager to win regulatory approval for ETF share classes in 2025, and it launched the industry's first active ETF share class, the Dimensional US Micro Cap ETF (DFMC). Rather than opening an existing mutual fund to ETF shareholders, Dimensional moved ETF shareholders into the mutual fund and left them there as a class.

A record $663.59 billion flowed into active ETFs this year and the money concentrated in three firms: Dimensional, J.P. Morgan and iShares. Across the eight converted funds, roughly $100 billion of ETF assets now sit inside mutual funds that already held $150 billion.

Starting November 1, management fees and expenses across the converted funds will fall 9% on an asset-weighted basis, a method that gives larger funds more weight than smaller ones. For ETF investors, DFAT's expense ratio will top out at 0.26%, down from the standalone ETF's 0.28%, and DFAS drops to 0.25% from 0.26%; DFAC holds at 0.17%, so one of the three came through the conversion at the same price.

Two of Monday's funds also picked up a second objective over the summer. Since July 16, according to a Securities and Exchange Commission filing, the portfolios behind DFAS and DFAT have aimed to minimize federal income taxes on returns, selling losing stocks to offset gains and keeping gains long-term where rates are lower. The filing predates the October 2 merger, so the tax goal was written into both portfolios while they were still standalone ETFs, and the coverage does not say what, if anything, the ETF class changes about the tax position of mutual fund shareholders.

This publication has argued that the wrapper migration is a one-way door, with mutual fund assets stranded and each conversion lowering the bar for the next active manager to list an ETF. Dimensional's two batches run that idea in the other direction. The ETF assets now sit inside the mutual funds, with the wrapper surviving as a class, and the rewards the firm is holding out to shareholders are a lower fee and, in two of the funds, tax management. Whether other managers running both a mutual fund book and an ETF lineup copy the structure is the question the two closings leave open.

The next fixed date is November 1, when the asset-weighted cut takes effect across the funds; Dimensional has now completed both batches, and no other issuer has been identified as preparing the same move.