You believe in the company you work for. You chose to be there, you contribute to its success every day, and you have the equity grants to prove it.
The question worth asking has nothing to do with whether the company is good. The question is whether your financial life has quietly become a single bet, one where your salary, your bonus, your unvested RSUs, your career trajectory, and a large chunk of your portfolio all rise and fall with the same stock ticker.
The Concentration Problem Hiding in Plain Sight
Think of your financial life as a building.
Your salary is the foundation.
Your bonus is a floor.
Your vested stock is another floor.
Your unvested RSUs are a floor under construction.
Your 401(k) contributions, your ESPP shares, your career growth potential: all additional floors.
If every one of those floors is made from the same material, a single structural flaw can bring the whole building down at once.
This is concentration risk, and it tends to accumulate gradually. You join a company, vest some shares, reinvest through an Employee Stock Purchase Plan, watch the stock climb, and feel validated. Your 401(k) might hold an S&P 500 index fund that itself has a meaningful weighting in your employer's stock. Before long, 30%, 40%, even 50% or more of your financial picture is tied to one company.
Each individual decision along the way felt reasonable. The aggregate exposure is the part that deserves scrutiny.
A Useful Guideline (With Important Caveats)
A common rule of thumb among financial planners is that any single stock position above roughly 10% to 15% of your investable assets warrants a closer look. At that level, a significant decline in one holding can materially affect your net worth and your ability to meet financial goals.
This guideline is a starting point, not a rigid boundary. Several factors push the threshold higher or lower for any given person:
Age and time horizon: A 32-year-old with decades of earning power ahead can tolerate more concentration than a 58-year-old approaching retirement.
Liquidity needs: If you plan to buy a home in two years, a concentrated stock position adds volatility at exactly the wrong time.
Future vesting schedule: Large upcoming RSU grants mean your concentration is growing, even if you do nothing.
Tax implications: Selling shares with large unrealized gains triggers capital gains taxes. The cost of diversifying matters, and a phased approach often makes more sense than a single large sale.
Risk tolerance and goals: Someone pursuing early financial independence needs more predictability than someone with a generous pension or substantial outside assets.
The 10% to 15% figure is useful because it forces the conversation. Once you see the number, you can make an informed choice about whether your concentration level is deliberate or accidental.
Calculating Your True Exposure
Most people undercount their exposure because they look at one account at a time. A complete picture requires adding up every source:
Vested shares held in brokerage accounts.
Unvested RSUs and stock options with a reasonable probability of vesting. While you may not be able to sell these today, they represent real economic exposure to the stock.
ESPP holdings accumulated through payroll deductions.
Company stock in your 401(k) if your plan offers it as an investment option or uses it for employer matching.
Index fund overlap: If your employer is a mega-cap stock, your S&P 500 or Nasdaq-100 index funds likely hold a meaningful percentage of that same company. A $500,000 S&P 500 position could include $15,000 to $35,000 or more in a single large tech stock.
Sector exposure: Even if you diversify away from your employer's stock, replacing it with other companies in the same industry leaves you vulnerable to sector-wide downturns. A software engineer holding shares in their employer plus heavy positions in other tech stocks through individual picks or sector ETFs may have 60% or more of their wealth tied to the technology sector.
Add these together, then divide by your total investable assets (retirement accounts, taxable accounts, and liquid savings). The resulting percentage is your true single-stock or single-sector concentration. For many tech professionals, this number is significantly higher than they expect.
The most revealing stress test is simple: if this stock fell 40% at the same time your job became less secure (as often happens during company-wide downturns), would your financial plan still work? If the answer is uncertain, your concentration level deserves attention.
Why Diversification Protects What You've Already Built
Reducing a concentrated position can feel like a vote of no confidence in your company. Reframing the decision helps.
Corporate executives, including founders and CEOs who are deeply committed to their companies, routinely diversify their holdings through structured selling plans. They do this because sound financial management and belief in a company are two separate things.
Consider what concentration risk actually costs you. If 40% of your portfolio is in one stock and it drops by half, your overall portfolio loses 20%. Recovering from that requires a 25% gain across your entire portfolio, just to get back to even. Meanwhile, a diversified portfolio experiencing the same single-stock decline might lose only 5% to 7% overall, a setback measured in months rather than years.
Diversification also buys you something less tangible but equally valuable: decision-making clarity.
When a large portion of your wealth depends on one outcome, every piece of company news triggers financial anxiety. A diversified portfolio lets you evaluate career decisions on their own merits, without the added pressure of "my net worth depends on this."
Practical Steps Toward a Healthier Balance
You don't need to sell everything at once. In fact, a gradual, tax-aware approach almost always produces better outcomes. Several strategies can help:
Sell on a schedule: Commit to selling a fixed percentage of shares each quarter or after each vesting event. Automating the decision removes the temptation to time the market.
Use tax-loss harvesting: Offset gains from selling concentrated positions with losses elsewhere in your portfolio to reduce your tax bill.
Prioritize high-cost-basis lots: When selling, choose shares with the highest cost basis first to minimize capital gains taxes. Your brokerage should allow specific lot identification.
Redirect new equity: Even if you keep existing shares, you can sell RSUs promptly upon vesting and redirect proceeds into diversified investments. This prevents concentration from growing further.
Rebalance across account types: Your 401(k) and IRA offer tax-advantaged space where you can hold diversified funds without triggering taxable events. Concentrate your diversification efforts there while being more strategic about taxable account sales.
The goal is steady progress toward a portfolio that can withstand a bad quarter, a bad year, or even a bad era for your employer or sector, while still participating in the long-term growth of a broad, global economy.
If you're unsure where your concentration stands or how to reduce it without unnecessary tax costs, a conversation with an advisor can help you map out a plan tailored to your specific vesting schedule, tax situation, and goals.
The team at Pantile Investments specializes in helping professionals work through exactly this kind of analysis. Consider scheduling a call to see where you stand and what a more resilient portfolio could look like for you.
