You check your brokerage account and one position has quietly become the whole story. Maybe it’s years of RSU vesting at a Seattle tech company. Maybe it’s founder stock, an inherited holding, or a name you bought early and never trimmed. However it got there, a single line item now drives nearly half your net worth, and that’s the part that keeps you up at night even when the company is doing well.
When one holding dominates your portfolio, even a high-quality company can create single-stock risk. A sudden drop, industry shift, or company-specific news can affect your overall financial picture far more than a diversified portfolio ever would. The good news is you have a practical toolkit of strategies to reduce concentration thoughtfully over time.
Your Diversification Toolkit
Think of these approaches as tools rather than an all-or-nothing checklist. Many people combine two or three over several years.
Selling Strategies: Systematic sales spread the process out and can help manage taxes and market timing. A 10b5-1 plan adds structure by setting predetermined selling instructions in advance, when you are not aware of material nonpublic information. This approach can make the unwind feel more mechanical and less emotional while remaining fully compliant.
Tax-Efficient Alternatives: Exchange funds let you contribute shares of your concentrated stock in-kind and receive a diversified basket of other stocks in return, often without triggering an immediate capital gains tax. Charitable giving through a donor-advised fund or direct donation of appreciated shares can provide an immediate deduction while supporting causes you care about. Tax-managed long-short strategies, such as those offered by managers like AQR, can serve as another option in a gradual unwind plan. These approaches seek to offset gains with losses elsewhere in the portfolio while maintaining broad market exposure.
Hedging Approaches: Collars and prepaid forwards can protect against downside without requiring an immediate sale. They are more complex and usually make sense only in specific situations, so most people explore them after reviewing simpler options first.
Hypothetical Example
Consider a hypothetical senior engineer in his late forties who has watched his company stock grow to almost 45 percent of his portfolio after a decade of RSU grants. He does not want to sell everything at once, but he also does not want to stay overly exposed. Working with his advisor, he puts a 10b5-1 plan in place for steady quarterly sales over the next three years. He donates a portion of shares to his donor-advised fund for charitable giving, and he allocates another slice to a tax-managed long-short strategy to help offset gains. Over time, the concentrated position drops to a more comfortable level while taxes stay manageable and his overall diversification improves.
Who is this for?
Bottom line, the real cost of doing nothing with a concentrated stock position is not just short-term volatility. It is the quiet risk that one company’s fortunes could derail the financial future you have worked so hard to build. A thoughtful, multi-year plan that mixes selling strategies, tax-efficient alternatives, and careful coordination with your advisor can turn that single large holding into a more balanced part of your overall wealth. The first step is usually a straightforward conversation to see which tools fit your situation best.
Resources:
- https://www.fidelity.com/learning-center/wealth-management-insights/diversify-concentrated-positions
- https://www.schwab.com/learn/story/3-strategies-highly-appreciated-stocks
- https://www.investopedia.com/articles/stocks/11/diversify-stock-position.asp
This hypothetical example is for illustrative purposes only and does not represent the experience of any specific client or guarantee future results. Outcomes will vary based on individual circumstances, market conditions, and other factors. Investing involves risk, including loss of principal.
