SEC Opens Door to ETF Share Classes With Dimensional Approval

A Return to Principles

In his statement titled “A Return to Principles: Statement on ETF Share Class Relief”, SEC Commissioner Mark T. Uyeda framed the decision as both overdue and transformative:

“Today, the Commission takes a long-overdue step toward modernizing our regulatory framework for investment companies that reflects the evolution of collective investment vehicles from being primarily daily-redeemable funds to exchange-traded funds (ETFs). The publication of this notice — seeking comment on a proposed multi-class ETF structure — represents a substantive step forward, not just a procedural formality. It is a signal that the Commission is willing to reexamine outdated constraints, embrace innovation, and consider relief that could benefit investors, fund sponsors, and markets alike.”

Uyeda emphasized that the move preserves investor protections while encouraging competition, noting that similar relief has long been held exclusively by Vanguard.

Uyeda added:

For too long, the artificial divide between mutual fund and ETF share classes has limited investor choice, operational efficiency, and resulted in suboptimal tax treatment. The proposed structure would allow a single fund to offer both exchange-traded and traditional mutual fund shares—providing investors with flexibility while preserving the core protections of the Investment Company Act. Moreover, it facilitates competition, in that similar relief has been long held by a single asset manager.

He called the decision “principled modernization,” supported by safeguards such as board oversight, conflict monitoring, and detailed disclosure.

From Patent to Policy

For more than 20 years, Vanguard’s unique patent allowed it to run ETFs as share classes of mutual funds, giving it a structural advantage in scale and tax efficiency. That patent’s expiration in 2023 set the stage for broader industry adoption.

Dimensional Fund Advisors is now the first to gain SEC approval under this framework, but dozens of other asset managers have pending applications.

If these are approved, mutual fund complexes could quickly roll out ETF share classes across hundreds of portfolios, offering investors both traditional mutual fund shares and exchange-traded shares of the same strategy.

What Do ETF Share Classes Mean for Investors?

The approval has clear advantages for investors:

• Tax efficiency through the ETF wrapper’s in-kind creation/redemption process.
• Intraday trading flexibility, unlike mutual funds’ once-a-day pricing.
• Cost synergies as fund sponsors operate a single pool of assets across multiple share classes.
• Choice and accessibility, giving investors multiple entry points into the same strategy.

What Do ETF Share Classes Mean for the Industry?

In a previous article, Emmett Flood from Sound Capital Solutions said that fund sponsors see the dual share class structure as a strategic way to revitalize older products by giving them a more appealing, modern wrapper.

For firms with established fund lineups, this allows them to tap into the surging demand for ETFs without the major undertaking of launching brand-new funds.

On the other hand, industry veteran Nicholas Phillips cautioned that such approval could unleash an “immediate, far-reaching, and potentially overwhelming” wave of ETF share class launches.

He warned that exchanges, market makers, custodians, and authorized participants (APs) could face operational strain:

• Exchanges might be pressed to handle a surge in new symbols and trading activity.
• Market makers and LMMs would need more capital and staff to support liquidity across a flood of new ETFs.
• APs and custodians could struggle with basket processing and operational scale.
• White-label platforms may have to triage client launches, prioritizing larger or better-prepared issuers.

Philipps concluded that readiness—not anticipation—would separate winners from those left scrambling in a transformed landscape.

A Turning Point

The SEC’s approval is more than a procedural update. It is the most significant regulatory shift in ETFs since their creation three decades ago, aligning the regulatory framework with how modern investors allocate capital.

For investors, it brings efficiency and choice. For fund managers, it lowers barriers to entering the ETF market. But for the broader ETF ecosystem—exchanges, APs, market makers, custodians—it is a stress test of operational resilience.

Dimensional Fund Advisors may be the first mover, but the industry is bracing for a wave of approvals that could redefine the scale, scope, and speed of ETF growth in the United States.

Please note this article is for information purposes only and does not in any way constitute investment advice. It is essential that you seek advice from a registered financial professional prior to making any investment decision.