The IRS has issued two documents addressing ETF transactions under Section 351 of the Internal Revenue Code, putting greater focus on whether assets transferred to an ETF resemble its intended portfolio from the start. The guidance does not end these transactions, but signals that transfers involving portfolios materially different from an ETF’s eventual holdings could be treated as taxable events.
The issue matters because Section 351 has become a route for seeding some ETFs with assets. More than 100 new funds have used these transactions to attract about $20 billion in assets. Firms including Alpha Architect and Cambria have participated. The structure can let investors move concentrated stock holdings into a more diversified ETF without immediately realizing capital gains on the transfer.
IRS focuses on the portfolio at the time of transfer
One document is an IRS revenue ruling. It says securities contributed to an ETF under Section 351 should substantially reflect the fund’s ultimate portfolio from the outset. If an investor first transfers a portfolio dominated by a single stock and the ETF then gradually sells down that position to become diversified, the IRS could view the arrangement as a taxable transaction rather than a straightforward asset transfer.
A frequently discussed example involves an investor contributing a portfolio that includes roughly a 20% position in Meta alongside other securities, then receiving shares in a diversified ETF. The tax question is not limited to the transaction’s formal structure. It also depends on the participants’ original intent, how the transferred assets compare with the ETF’s final portfolio, and what trades the fund makes after launch.
The IRS also issued a notice seeking public comment. It covers Section 351 transactions as well as other ETF-related tax and product-design issues, including box spread ETFs. Because the notice is still in the comment stage, the scope of any eventual action, how it might be implemented, and the tax treatment of some transactions remain uncertain.
Fund sponsors may need to revisit product design and records
ETF sponsors, advisers and investors involved in Section 351 transactions may need to document more carefully the purpose of a transfer, the assets contributed, the fund’s intended holdings and its post-launch rebalancing plans. Descriptions in product documents and transaction records could also receive closer scrutiny.
The documents do not mean Section 351 transactions will disappear. They may, however, narrow the scope for using them to address highly concentrated positions. Fund designs will need to reflect their actual investment objectives more directly, rather than relying primarily on trading after launch to reach the intended portfolio.
Tax attorney Thomas Zollers said in his analysis that the documents raise at least as many questions as they answer. Max Schatzow of AdvisorCounsel has also outlined the rules and transaction structures, focusing on the IRS’s concerns around asset transfers, ETF holdings and participant intent. Further guidance could follow as the comment process proceeds.
Industry debate grows as key details remain open
The documents prompted swift discussion across the ETF industry and among tax professionals. ETF analyst Dave Nadig said he received multiple calls and text messages shortly after their release, while commentary spread quickly on social media. Brent Sullivan of TaxAlphaInsider urged market participants to take time to examine the rules’ conditions before concluding from headlines that these transactions are no longer viable.
The debate highlights how tax treatment, product marketing and investor expectations can overlap in the ETF market. Investors considering a fund with a tax or asset-conversion feature still need to understand its holdings, trading mechanics, fees and potential tax consequences—not just the novelty of its design.
What market participants are watching next
Election-cycle uncertainty, rising interest rates, war and inflation are already contributing to a noisy market environment, where new policy documents can prompt rapid interpretations. For ETF sponsors and advisers, the immediate task is to check whether the regulatory text, transaction facts and client objectives align.
For now, the Section 351 documents mark the start of closer scrutiny rather than a fully defined ban. Market participants will be watching how the IRS responds to comments, how it distinguishes ordinary asset transfers from arrangements primarily intended to avoid tax, and whether ETF sponsors revise initial portfolios or post-listing trading plans.