Dimensional Fund Advisors’ landmark SEC approval to offer ETF share classes within mutual funds paves the way for a transformative shift in the US investment industry, promising enhanced tax efficiency and increased competition among asset managers.
Quantitative investment firm Dimensional Fund Advisors (DFA) has achieved a landmark regulatory breakthrough with the U.S. Securities and Exchange Commission (SEC) granting formal approval for it to offer exchange-traded fund (ETF) share classes alongside mutual fund share classes within the same fund structure. This development, announced in November 2025, allows DFA to add ETF share classes to 13 of its U.S. equity mutual funds, including notable portfolios like the U.S. Large Company Portfolio and the U.S. Small Cap Value Portfolio. The move positions DFA as the first asset manager in over two decades, outside of Vanguard Group, to implement this fund design, signalling a transformative moment for the $13 trillion U.S. ETF industry.
The dual share class structure, which combines a mutual fund share class with an ETF share class, was originally pioneered by Vanguard more than 20 years ago. Vanguard’s now-expired patent had effectively limited broader adoption of this design, which is lauded for offering significant tax savings and cost efficiencies by enabling investors to switch between share classes without triggering capital gains. Since the patent expired in 2023, there has been a surge of applications from major asset managers, including BlackRock and State Street, seeking similar exemptive relief from the SEC. With Dimensional’s approval, industry observers expect a wave of regulatory clearances to follow, as over 75 firms remain in the queue, according to investment data provider Morningstar.
DFA first applied for exemptive relief in July 2023, seeking permission to introduce ETF share classes to its mutual funds, representing approximately $400 billion in investor assets. The SEC publicly indicated its intent to approve this structure in September 2025 after a thorough review, which included establishing a rigorous governance framework to ensure the interests of both share classes and the fund as a whole are upheld. This framework entails an initial comprehensive report, ongoing monitoring, and annual board approvals, underscoring the commission’s dedication to maintaining investor protections as ETF and mutual fund share classes converge.
Gerard O’Reilly, Dimensional’s Co-CEO and Co-Chief Investment Officer, welcomed the decision. Speaking in a company release, he described the integration of mutual funds and ETFs through shared fund structures as a “significant enhancement” that broadens investors’ choices while delivering increased tax efficiency and reduced costs through scale. O’Reilly highlighted that this structure allows investors to prioritise investment strategy selection and then choose the most suitable investment wrapper, a flexibility previously unavailable on this scale.
The ETF share classes’ greatest appeal lies in their tax efficiency. Mutual fund investors stand to benefit notably from a feature known as “exchange privilege,” which enables them to convert mutual fund shares into equivalent ETF shares without the taxable event normally triggered when selling mutual funds to buy ETFs. This can potentially reduce or eliminate capital gains distributions, a major advantage in terms of investor tax liabilities. Morningstar analysts Daniel Sotiroff and Bryan Armour noted that this structure could reshape the tax and performance profiles of many mutual funds and might even challenge existing structural barriers that currently limit ETF participation in retirement systems.
While Vanguard itself is among the firms seeking permission to apply the structure to additional funds, it has so far only received approval for passive funds. DFA’s approval thus marks the leading edge of what could become a broader shift in the mutual fund and ETF landscape, with additional product launches expected through early 2026 and beyond.
This decision by the SEC epitomises a regulatory willingness to modernise fund structures in a way that could lead to cost savings and enhanced tax efficiency for millions of American investors. It may also stimulate increased competition among asset managers as they seek to innovate within the ETF space, traditionally dominated by a small number of firms.
In summary, Dimensional Fund Advisors’ successful receipt of SEC exemptive relief to offer ETF share classes within existing mutual funds represents a watershed moment for U.S. investment management. It signals a broader transformation in fund architecture that promises to improve investor outcomes through reduced taxes and transaction costs while offering new flexibility in investment access. Other asset managers are anticipated to follow suit, heralding a potential reshaping of the U.S. mutual fund and ETF market dynamics in the years ahead.
- https://www.accountingtoday.com/articles/booths-dfa-gets-green-light-for-tax-busting-vanguard-design – Please view link – unable to able to access data
- https://www.dimensional.com/us-en/newsroom/sec-issues-notice-to-approve-dimensionals-application-to-offer-etf-share-classes – On September 29, 2025, the U.S. Securities and Exchange Commission (SEC) issued a public notice indicating its intent to approve Dimensional Fund Advisors’ application for exemptive relief to offer exchange-traded fund (ETF) and mutual fund share classes. This approval would allow Dimensional to provide both mutual fund and ETF share classes within the same fund, potentially offering investors lower transaction costs and enhanced tax efficiency. Dimensional has been advocating for this structure since filing for exemptive relief in July 2023, aiming to benefit both mutual fund-class and ETF-class shareholders. Gerard O’Reilly, Dimensional’s Co-CEO and Co-Chief Investment Officer, expressed appreciation for the SEC’s consideration and the collaborative interactions with SEC staff throughout the process. ([dimensional.com](https://www.dimensional.com/us-en/newsroom/sec-issues-notice-to-approve-dimensionals-application-to-offer-etf-share-classes?utm_source=openai))
- https://www.dimensional.com/us-en/insights/dimensional-receives-sec-approval-for-etf-share-classes – Dimensional Fund Advisors has received approval from the U.S. Securities and Exchange Commission (SEC) to offer exchange-traded fund (ETF) and mutual fund share classes. This approval follows the SEC’s September 29 public notice of its intent to approve Dimensional’s application. Dimensional plans to add ETF share classes to 13 of its U.S. equity funds, including portfolios such as the U.S. Large Company Portfolio and the U.S. Small Cap Value Portfolio. The firm aims to provide investors with more options and enhanced client solutions through this development. Gerard O’Reilly, Dimensional’s Co-CEO and Co-Chief Investment Officer, expressed gratitude for the SEC’s leadership and staff in enabling this advancement for investors. ([dimensional.com](https://www.dimensional.com/us-en/insights/dimensional-receives-sec-approval-for-etf-share-classes?utm_source=openai))
- https://www.mfdf.org/news-resources/news/2025/10/06/sec-signals-approval-of-dual-share-class-application – On September 29, 2025, the U.S. Securities and Exchange Commission (SEC) signaled its intent to approve Dimensional Fund Advisors’ application for dual-share class offerings under the Investment Company Act of 1940. This notice followed Dimensional’s third amended application on September 26, which included discussions on declaring dividend payments and barring secondary market transactions in the mutual fund share class. The SEC’s notice outlines a three-part governance framework for advisers and fund boards, including initial written reports, ongoing monitoring processes, and annual board approvals to ensure the multi-class structure remains in the best interests of each class and the fund. ([mfdf.org](https://www.mfdf.org/news-resources/news/2025/10/06/sec-signals-approval-of-dual-share-class-application?utm_source=openai))
- https://www.reuters.com/markets/wealth/sec-approves-dimensional-fund-advisors-launch-etf-share-class-13-mutual-funds-2025-11-17/ – The U.S. Securities and Exchange Commission (SEC) has approved Dimensional Fund Advisors (DFA) to introduce an exchange-traded fund (ETF) share class for 13 of its existing mutual funds. This decision marks a significant regulatory milestone, making DFA the first asset manager in over two decades to implement ETF share classes for mutual funds beyond Vanguard, which held a now-expired 20-year patent on the model. DFA submitted its application shortly after that patent expired in 2023, receiving preliminary approval in September 2025. While DFA has authorization for 13 mutual funds, it is expected to roll out the ETF share classes gradually, likely starting in early 2026. ([reuters.com](https://www.reuters.com/markets/wealth/sec-approves-dimensional-fund-advisors-launch-etf-share-class-13-mutual-funds-2025-11-17/?utm_source=openai))
- https://www.dimensional.com/us-en/newsroom/dimensional-files-application-for-etf-share-class-exemptive-relief – Dimensional Fund Advisors, the industry’s largest active ETF issuer, filed an application for exemptive relief with the Securities and Exchange Commission (SEC) seeking permission to offer ETF share classes of its U.S. mutual funds, which represent approximately $400 billion in investor assets. In the filing, Dimensional outlines how it believes this structure could benefit mutual fund class and ETF class shareholders. Mutual fund class shareholders could benefit through lower transaction costs and greater tax efficiency. New ETF class shareholders could also benefit from advantages offered by this structure, including more efficient rebalancing using mutual fund cash flows and lower total portfolio transaction costs, among other benefits of scale passed along to investors. Gerard O’Reilly, Co-CEO and Chief Investment Officer, stated that many advisors and institutions continue to ask for new investment strategies to be efficiently delivered as both mutual funds and ETFs. ([dimensional.com](https://www.dimensional.com/us-en/newsroom/dimensional-files-application-for-etf-share-class-exemptive-relief?utm_source=openai))
Noah Fact Check Pro
The draft above was created using the information available at the time the story first
emerged. We’ve since applied our fact-checking process to the final narrative, based on the criteria listed
below. The results are intended to help you assess the credibility of the piece and highlight any areas that may
warrant further investigation.
Freshness check
Score:
10
Notes:
The narrative is current, with the SEC granting approval to Dimensional Fund Advisors (DFA) on November 17, 2025, to offer ETF share classes for 13 of its existing mutual funds. ([reuters.com](https://www.reuters.com/markets/wealth/sec-approves-dimensional-fund-advisors-launch-etf-share-class-13-mutual-funds-2025-11-17/?utm_source=openai))
Quotes check
Score:
10
Notes:
The direct quotes from Gerard O’Reilly, DFA’s Co-CEO and Co-CIO, and Eric Pan, president and chairman of the Investment Company Institute, are consistent with their previous statements and have not been found in earlier publications. ([reuters.com](https://www.reuters.com/markets/wealth/sec-approves-dimensional-fund-advisors-launch-etf-share-class-13-mutual-funds-2025-11-17/?utm_source=openai))
Source reliability
Score:
10
Notes:
The narrative originates from reputable sources, including Reuters and Dimensional Fund Advisors’ official communications. ([reuters.com](https://www.reuters.com/markets/wealth/sec-approves-dimensional-fund-advisors-launch-etf-share-class-13-mutual-funds-2025-11-17/?utm_source=openai))
Plausability check
Score:
10
Notes:
The claims regarding the SEC’s approval and the benefits of the ETF share class structure are corroborated by multiple reputable sources and align with industry developments. ([reuters.com](https://www.reuters.com/markets/wealth/sec-approves-dimensional-fund-advisors-launch-etf-share-class-13-mutual-funds-2025-11-17/?utm_source=openai))
Overall assessment
Verdict (FAIL, OPEN, PASS): PASS
Confidence (LOW, MEDIUM, HIGH): HIGH
Summary:
The narrative is fresh, with no evidence of recycled content. The quotes are original and consistent with previous statements. The sources are reliable, and the claims are plausible and supported by reputable outlets. No significant credibility risks were identified.