A little-known strategy is helping wealthy investors avoid taxes, but regulators may be starting to pay attention.
A growing number of investors are using a legal loophole tied to ETFs to avoid paying taxes on large stock gains, raising concerns about potential scrutiny from authorities.
The strategy is built around an old rule.
Section 351 of the US tax code allows investors to transfer assets into a company in exchange for shares without triggering taxes. Wealth managers are now applying this to ETFs, letting clients move concentrated stock positions into diversified funds without selling.
In simple terms:
- Investors contribute stocks into a newly created ETF
- They receive ETF shares instead
- No immediate capital gains tax is triggered
Why investors are using it
The appeal is clear. Many wealthy investors hold stocks with very low cost bases, meaning selling would create large tax bills. This method allows them to:
- Diversify their portfolios
- Keep exposure to markets
- Avoid immediate taxes
The trend is growing fast, with nearly $8.7 billion already used in ETF seeding deals between 2021 and 2025.
Why regulators may step in
The concern is about intent. The rule was originally designed to support business formation, not to help investors avoid taxes while diversifying. Authorities are now watching for cases where the process looks engineered rather than natural, especially when:
- Investors structure portfolios just to meet technical rules
- Assets are added temporarily to pass thresholds
- Shares are sold shortly after the ETF is created
In these situations, regulators could argue the transaction is effectively a tax-free sale, not a legitimate restructuring.
A growing gray area
Some strategies are already raising red flags. Techniques like “stuffing” and “sequential seeding” are being used to carefully manage portfolio weights, allowing investors to technically qualify while achieving diversification.
But if these steps are seen as part of a pre-planned strategy, authorities could reclassify the entire process and apply taxes retroactively.
This is part of a broader pattern. Every time tax rules tighten, new strategies emerge to work around them. ETF seeding is the latest version of that cycle, sitting in a gray area between legal optimization and potential abuse.
For now, it remains allowed. But as usage grows, regulatory attention is likely to follow.
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Disclosure: This article does not represent investment advice. The content and materials featured on this page are for educational purposes only.
