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Concentrated Stock: Four Exits Ranked by After-Tax Outcome

Sell, exchange, contribute, or borrow. Each route prices risk, liquidity, and tax differently, and the right answer depends on which constraint binds you.

Published 2026-07-07 · Optimist Tax Advisors

A large single-stock position with low basis has four standard exits. Ranking them requires knowing which of three things you actually want: cash, diversification, or maximum terminal wealth.

1. Sell and pay

Full liquidity, full flexibility, immediate tax of roughly 24% to 37% of the gain depending on state. Underrated when the position is genuinely risky: the tax is the price of eliminating a concentration that could cost far more than the tax. Staged sales across tax years, paired with harvested losses from a direct-index portfolio, soften the rate impact.

2. Exchange fund

Diversification without realization, at the cost of a seven-year lock and a mandated illiquid sleeve. Best for holders with no cash need who would otherwise sit on the position indefinitely. The gain is deferred with carryover basis, not eliminated, though a later step-up at death can finish the job.

3. Charitable remainder trust

Diversification plus an income stream plus a deduction, at the cost of an irrevocable charitable remainder. Wins for holders with philanthropic intent, long horizons, and high state taxes. Distributions come back taxed under ordering rules, so it is deferral with a purpose, not escape.

4. Borrow against it

Liquidity without a sale and without diversification. A securities-backed line at reasonable spreads monetizes the position while the gain rides toward a potential basis step-up. The concentration risk remains fully in place and now carries leverage. Appropriate as a bridge or for modest liquidity needs; dangerous as a lifestyle.

The portfolio answer

Real plans blend routes: sell a tranche against harvested losses, exchange-fund a tranche, contribute a tranche to a CRT, and keep a tranche outright. The blend is a risk decision first and a tax decision second.

This article is educational commentary, not individualized tax, legal, or investment advice. Rates and thresholds referenced are as of the publication date.
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