You’ve built significant wealth in a single stock. Maybe it’s equity compensation from a tech career, founder shares from a business you built, or a position you’ve held for years that appreciated beyond what you imagined. The problem isn’t the gain, it’s what happens when you try to do anything about it.
Selling outright means handing over 20% to federal long-term capital gains tax, another 3.8% for Net Investment Income Tax, and if you’re in California, an additional 13.3% in state taxes. That’s 37.1% of your gain gone before you reinvest a dollar.
The question becomes: how do you reduce taxes on concentrated stock position, access liquidity, or diversify your wealth without triggering a tax bill that erases a third of what you’ve built?
We work with clients facing this exact situation. Here’s what actually works.
Why Concentrated Positions Create a Tax Trap
A portfolio becomes concentrated when a single stock represents more than 10-15% of your investable assets. Many of our clients exceed that threshold significantly—30%, 50%, sometimes 80% of everything outside their 401(k).
The risk isn’t theoretical.
More than 40% of all companies in the Russell 3000 Index since 1980 experienced a catastrophic stock price loss, defined as a 70% decline that never recovered. Around 66% of stocks underperformed the index itself.
You know diversification makes sense. The tax bill is what stops you.
This creates what economists call “tax lock-in effect.” You delay making the right portfolio decision because the tax consequences feel worse than the risk of staying put. But avoiding tax at the expense of risk management can cost you more than the tax bill ever would have.
Donate Appreciated Stock to a Donor-Advised Fund
If you have charitable intentions (and many of our clients do), this is the most tax-efficient way to handle a portion of your concentrated position.
Here’s how it works:
You transfer shares of your appreciated stock directly to a donor-advised fund. You receive an immediate tax deduction for the fair market value of the stock, up to 30% of your adjusted gross income. The charity receives the full value without paying capital gains tax. You avoid capital gains tax entirely on those shares.
The DAF holds the proceeds, and you recommend grants to charities over time. You maintain influence over where the money goes, but the tax benefit happens immediately.
This isn’t deferral. It’s the permanent elimination of the capital gains tax on the donated shares. There is no other strategy that does that.
For the portion of your position you genuinely intend to direct toward charitable purposes, the DAF is the cleanest solution. Donors often give more than 20% more to causes they care about by using this structure instead of selling stock and donating cash.
Borrow Against Your Position Using Securities-Backed Lending
If you need liquidity but don’t want to sell, you can borrow against your stock holdings through a securities-backed line of credit.
This is not a margin loan used for trading. It’s a lending facility that uses your portfolio as collateral, typically at interest rates between 2-4% above benchmark rates.
No taxable event occurs when you borrow. You access cash without triggering capital gains. You maintain full ownership of your shares, continue receiving dividends, and preserve any future appreciation.
The loan interest may be tax-deductible if you use the proceeds for investment purposes. You can repay on your own schedule or let the balance carry as long as the loan-to-value ratio stays within the lender’s limits.
The risk is a margin call if your stock price drops significantly. If the value of your collateral falls below the lender’s threshold, you’ll need to either add cash, pledge additional securities, or sell shares to reduce the loan balance.
We use this strategy with clients who need short-term liquidity or want to fund a diversification plan over time without selling the entire position at once. It’s particularly effective when combined with other tax reduction strategies.
Use Tax-Loss Harvesting in Other Positions to Offset Gains
If you hold other investments outside your concentrated position, you can strategically sell underperforming assets to realize losses that offset gains from your concentrated stock.
This requires maintaining a diversified portfolio alongside your concentrated position. When you do sell a portion of your concentrated stock, you can use harvested losses to reduce or eliminate the capital gains tax on that sale.
You can offset up to $3,000 of ordinary income per year with excess losses, and any remaining losses carry forward indefinitely to future tax years.
This isn’t a standalone solution for a large concentrated position, but it’s a tactical tool that reduces the tax friction of gradual diversification. We build this into our tax planning and wealth management process for clients who are methodically reducing concentration over multiple years.
Consider an Exchange Fund for Long-Term Diversification
An exchange fund allows you to contribute your concentrated stock into a pooled investment vehicle in exchange for a proportional interest in a diversified portfolio.
No taxable event occurs at the contribution. Your original cost basis carries forward into the fund. You immediately gain exposure to a basket of securities instead of a single stock.
The requirement: you must hold your interest in the fund for seven years to preserve the tax deferral. If you exit early, you’ll trigger the deferred capital gains.
Exchange funds typically require minimum contributions of $500,000 to $1 million or more. They’re designed for high-net-worth investors with long time horizons who want diversification without an immediate tax bill.
The seven-year lock-up is real. You can’t access that capital during the holding period without unwinding the tax benefit. But if you don’t need the liquidity and your primary goal is risk reduction, this can be an effective structure.
Use Options Strategies to Reduce Downside Risk
Options strategies don’t eliminate your tax liability, but they can reduce the risk of holding a concentrated position while you work through a longer-term diversification plan.
A collar is the most common approach. You sell call options on your stock (capping your upside) and use the premium to buy put options (limiting your downside). This creates a range-bound position that reduces volatility.
A zero-cost collar means the call premium fully finances the put purchase, so there’s no out-of-pocket cost. You give up gains above a certain level in exchange for protection below a certain level.
No taxable event occurs when you enter the collar. You still own the underlying stock. The options simply define the range of outcomes.
This strategy works well when you’re planning to sell over time but want to protect against a sharp decline in the near term. It’s also useful if you’re waiting for a specific event, such as a vesting schedule, a bonus, a retirement date, before you begin diversifying.
Spread Recognition Over Multiple Years with Installment Sales
If you’re selling your position to a buyer who’s willing to structure payments over time, an installment sale allows you to spread capital gains recognition across multiple tax years.
You recognize gains proportionally as you receive payments, rather than all at once in the year of sale. This prevents a single-year income spike that pushes you into higher tax brackets or triggers additional Medicare surcharges.
This strategy is most relevant for business owners selling a company or executives negotiating an exit. It requires a willing buyer and careful structuring to comply with IRS rules.
The benefit is smoothing your tax liability over time, which can be paired with other deduction strategies in each year to further reduce your effective rate.
Coordinate Your Strategy Across Multiple Approaches
The most effective approach isn’t choosing one of these strategies. It’s coordinating several of them based on your specific situation.
You might donate 10% of your position to a DAF for the charitable deduction and permanent tax elimination. Borrow against another 20% using a securities-backed line of credit to fund diversification into other assets. Harvest losses in your taxable account to offset gains as you sell down 5-10% per year over the next several years. Use a collar to protect the remaining position while you execute the plan.
This isn’t complex for the sake of complexity. It’s recognizing that a $3 million, $5 million, or $10 million concentrated position doesn’t have a one-size-fits-all solution.
The goal is to reduce risk and access liquidity while keeping as much of your wealth intact as possible. That requires looking at your entire financial picture, not just the stock position in isolation.
Work with a Fiduciary Who Understands Tax-Aware Diversification
At Keen Capital, we work with high-net-worth individuals and families who face exactly this challenge. We don’t sell products or earn commissions. We operate as fee-only fiduciaries, which means our only incentive is building the best outcome for you.
We coordinate tax planning, portfolio construction, and long-term wealth preservation into a single strategy. We help you determine which combination of approaches makes sense for your situation, your timeline, and your goals.
If you’re sitting in a concentrated position and you’re not sure how to move forward without losing a third of it to taxes, schedule an introductory call with our team. We’ll start by understanding your situation before offering any recommendations.
Let’s talk through your options.
Until next time!
