Investing approach
Diversifying a concentrated stock position
How do I diversify a large concentrated stock position?
Most approaches spread sales across multiple tax years to manage the capital gains rate, paired with techniques that reduce the bill: donating appreciated shares, harvesting losses elsewhere, and timing sales into lower-income years. The harder problem is usually psychological, because the position is often the reason for the wealth.
The short version
- A concentrated position exposes you to company-specific risk that carries no expected return premium. You are not compensated for holding it.
- Long-term capital gains rates apply to positions held more than one year and are tiered by taxable income.
- Donating appreciated shares held long-term to a qualified charity can avoid the capital gain entirely while allowing a deduction for fair market value, subject to limits.
- Concentration risk is compounded when the position is in your employer, because your income and your portfolio share a single point of failure.
Why concentration is a risk you are not paid for
Markets compensate investors for bearing risk that cannot be diversified away. Company-specific risk can be diversified away, which means holding it earns you no expected premium. You are taking risk for free.
That framing helps because it separates two questions people tend to merge: whether the company is a good business, and whether you should hold this much of it. A position can be an excellent company and still be an unreasonable share of your net worth.
The tax problem, and what reduces it
A low cost basis makes selling expensive, and that expense is the reason most concentrated positions stay concentrated. Several things reduce it:
- Spreading sales across multiple tax years to stay within a lower capital gains bracket
- Selling in years when other income is unusually low, such as the gap between retirement and Social Security
- Donating appreciated shares directly to charity or to a donor-advised fund, avoiding the gain entirely
- Harvesting losses elsewhere in the portfolio to offset realized gains
- Directing new savings entirely away from the position, so concentration falls as everything else grows
When the employer connection makes it worse
If the concentrated position is in your employer, your salary, your equity compensation, and a large share of your portfolio all depend on the same company. A bad outcome does not arrive as one problem; it arrives as three at once, usually in the same quarter.
This is the situation where the case for acting is strongest, and also where people resist most, because holding often feels like loyalty or conviction rather than a portfolio decision.
Building a schedule you will actually follow
The most effective approach we see is a written schedule decided in advance: how many shares are sold each period, over what horizon, regardless of price.
The point is removing the decision from the moment. Anyone deciding each quarter whether to sell will find a reason to wait: the price is down so it is a bad time, or the price is up so it is going higher. A schedule set in advance and reviewed annually sidesteps that entirely.
Questions
Follow-ups we get asked.
There is no universal threshold, but a common reference point is that a single holding above 10–20% of investable net worth warrants a deliberate decision rather than inertia. The relevant test is what happens to your plan if the position falls by half and does not recover.
Hedging strategies can reduce downside exposure without triggering an immediate sale, but they carry their own costs, complexity, and tax treatment, and some can create constructive-sale problems. They are worth evaluating with a tax professional rather than adopting as a default alternative to selling.
It can. Contributing appreciated shares held long-term to a donor-advised fund generally avoids the capital gain and allows a deduction for fair market value, subject to income limits. It works best for people who already intend to give and want to front-load several years of giving into one high-income year.
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This article is general educational information, current as of July 29, 2026. It is not personalized investment, tax, or legal advice, and it does not take into account any individual's circumstances. Tax and benefit rules change; verify current rules against official sources before acting. TradeWinds does not provide tax or legal advice.