How Do You Manage a Concentrated Stock Position?
Quick answer: A concentrated stock position — when a single stock makes up an outsized share of your portfolio, often company stock accumulated over a career — carries significant risk, because your financial security becomes tied to the fortunes of one company. The prudent move is usually to diversify, but unwinding a concentrated position often triggers capital gains taxes, creating a tension between reducing risk and managing the tax cost. The good news is there are several strategies to unwind a position thoughtfully and tax-efficiently: selling gradually over multiple years to spread the tax, using losses elsewhere to offset gains, donating appreciated shares to charity (which can avoid the capital gains entirely), and — for company stock in a 401(k) — potentially the NUA strategy. There's also an emotional dimension: people often become attached to a stock that's done well, which can cloud judgment. For Columbus, Ohio retirees and professionals, managing a concentrated position is about reducing risk deliberately while managing the tax cost — ideally coordinated with a tax professional. This article is educational and is not personalized investment or tax advice.
Key Takeaways
- A concentrated stock position ties your financial security to a single company — a significant, often-underestimated risk.
- These positions commonly build up from company stock, a stock that grew a lot, or inherited shares.
- The prudent move is usually to diversify, but unwinding often triggers capital gains taxes.
- This creates a tension between reducing risk and managing the tax cost — which good strategy addresses.
- Strategies include selling gradually, offsetting gains with losses, donating appreciated shares, and (for company stock) NUA.
- There's an emotional dimension — attachment to a winning stock can cloud judgment about the risk.
- The goal is reducing risk deliberately while managing the tax cost, coordinated with a tax professional.
Table of Contents
- When One Stock Becomes Too Much
- Why Concentration Is So Risky
- How These Positions Build Up
- The Tension: Diversifying vs. Taxes
- Strategy 1: Sell Gradually Over Time
- Strategy 2: Offset Gains and Give Strategically
- Strategy 3: Special Situations (Company Stock and More)
- The Emotional Side of Letting Go
- Building a Plan to Diversify
- Frequently Asked Questions
When One Stock Becomes Too Much
Many people reach retirement — or approach it — holding a large position in a single stock. Often it's company stock accumulated over a long career; sometimes it's a stock that grew dramatically, or shares inherited from a family member. Whatever the source, when one stock makes up an outsized share of your wealth, it becomes a risk worth addressing.
What counts as "concentrated":
There's no single threshold, but generally, when a single stock makes up a large enough share of your portfolio that its performance significantly affects your overall financial security, you have a concentrated position. For some, that's when one stock is a substantial fraction of their investable assets. The exact line matters less than the principle: too much of your security riding on one company is a risk.
Why it's worth addressing:
A concentrated position is one of those risks that's easy to ignore — especially when the stock has done well. But it exposes you to the possibility that a single company's troubles could seriously damage your finances. Addressing it is a matter of prudent risk management, even when (especially when) the stock has been a great performer.
The company-stock angle:
For many Columbus-area professionals and retirees, the concentrated position is company stock — accumulated through stock purchase plans, equity compensation (RSUs, options), or 401(k) company stock over a career. This is common at large employers, and it carries an added risk: your job (income) and your investment (the stock) are both tied to the same company. If the company struggles, you could face both at once.
The goal of this article:
To explain why concentration is risky, the tax tension involved in unwinding it, the strategies to diversify thoughtfully and tax-efficiently, and the emotional dimension. For Columbus-area retirees and professionals, managing a concentrated position well is an important part of protecting your financial security. This article is part of my broader series on investing during retirement (the pillar is coming soon in this series).
Why Concentration Is So Risky
The core reason to address a concentrated position is risk — specifically, the risk that comes from tying too much of your wealth to a single company.
Single-company risk:
When a large share of your wealth is in one stock, your financial security depends on that one company. Individual companies — even great ones — can and do suffer serious, permanent declines. Companies face competition, disruption, mismanagement, scandals, industry shifts, and bad luck. Even blue-chip, seemingly-invincible companies have collapsed. A concentrated position exposes you fully to that single-company risk.
The lack of diversification:
Diversification — spreading your investments across many companies and asset classes — is one of the most fundamental risk-management principles in investing. It ensures that no single company's failure can devastate you. A concentrated position is the opposite of diversification; it puts an outsized bet on one company, forgoing the protection that spreading risk provides.
The asymmetry of the risk:
Here's a key point: the risk of a concentrated position is asymmetric. If the stock does well, you benefit — but you would have done reasonably well diversified too. If the stock does badly, you can suffer a devastating, potentially permanent loss that a diversified portfolio would have cushioned. The downside is far more damaging than the upside is beneficial, especially in retirement when you can't easily recover.
Why it's especially risky in retirement:
- You have less time to recover from a major loss
- You may be relying on the portfolio for income
- A concentrated position's collapse could permanently impair your retirement
- The stakes are simply higher when the money has to last
The company-stock double risk:
As noted, if the concentrated position is your employer's stock, you face a compounded risk: your income and your investment are tied to the same company. History has painful examples of employees who lost both their jobs and their savings when their company failed. This double exposure makes company-stock concentration especially worth addressing.
For Columbus-area retirees and professionals, understanding that concentration exposes you to a serious, asymmetric, single-company risk — one that's especially dangerous in retirement — is what motivates addressing it, even when the stock has been a strong performer.
How These Positions Build Up
Concentrated positions rarely happen on purpose — they build up gradually, through a few common paths. Understanding how yours arose can inform how to unwind it.
Company stock accumulation:
The most common path. Over a career, you accumulate your employer's stock through:
- Employee stock purchase plans (ESPPs)
- Equity compensation — restricted stock units (RSUs), stock options
- Company stock in your 401(k)
- Company match paid in stock
Bit by bit, over years or decades, this can grow into a large concentrated position without any single deliberate decision to over-concentrate.
A stock that grew dramatically:
Sometimes a position becomes concentrated simply because the stock did exceptionally well. A modest initial investment in a company that then soared can grow into an outsized share of your portfolio. The concentration is a byproduct of success — but it's still a risk going forward.
Inherited stock:
Some people inherit a large position in a single stock from a family member. This can come with emotional attachment (it was a parent's or grandparent's holding) and specific tax considerations (inherited stock generally receives a "step-up" in basis, which affects the tax picture of selling).
Emotional inertia:
Often, a position stays concentrated simply because of inertia and attachment — it's done well, selling feels like a mistake, and the tax cost of selling feels painful. So it sits, growing more concentrated, with the risk quietly building.
Why the source matters:
How the position arose affects the unwinding strategy:
- Company stock in a 401(k) may qualify for the NUA strategy (covered below)
- Inherited stock may have a stepped-up basis, reducing the tax cost of selling
- Long-held appreciated stock has large embedded gains, making the tax tension more acute
- Recently-acquired shares may have less embedded gain, making them easier to sell
For Columbus-area retirees and professionals, understanding how your concentrated position built up — and its tax characteristics — is the starting point for unwinding it thoughtfully.
The Tension: Diversifying vs. Taxes
The central challenge in managing a concentrated position is a genuine tension: diversifying reduces your risk, but selling appreciated stock triggers capital gains taxes. Navigating this tension is what good strategy is about.
The case for diversifying:
As covered, concentration is risky, and diversifying reduces that risk. From a pure risk-management standpoint, reducing a concentrated position is usually prudent. The sooner you diversify, the sooner you reduce the single-company risk.
The tax cost of selling:
But selling appreciated stock realizes capital gains, which are taxable. If you've held the stock a long time and it's appreciated significantly, the embedded gain — and thus the tax cost of selling — can be substantial. Selling the whole position at once could trigger a large tax bill, potentially pushing you into higher tax brackets and creating other tax consequences.
The tension:
This is the crux: risk management says diversify, but taxes say selling is costly. Selling everything immediately maximizes risk reduction but also maximizes the tax hit. Holding everything avoids the tax but keeps the risk. The right approach navigates between these — reducing risk while managing the tax cost.
Why it's not all-or-nothing:
The good news is that managing a concentrated position isn't an all-or-nothing choice between "sell everything now and pay the tax" or "hold everything and keep the risk." There are strategies to unwind the position gradually and tax-efficiently, reducing risk over time while spreading and minimizing the tax cost. The rest of this article covers those strategies.
The role of your tax situation:
How acute the tension is depends on your tax situation — your embedded gains, your tax bracket, your other income, and the tools available to you. This is why coordinating with a tax professional is central to managing a concentrated position: the right approach depends heavily on the tax specifics.
For Columbus-area retirees and professionals, recognizing the diversify-vs-taxes tension — and that it can be navigated thoughtfully rather than resolved all-or-nothing — is the key to managing a concentrated position well.
Strategy 1: Sell Gradually Over Time
The most straightforward strategy for unwinding a concentrated position while managing the tax cost is to sell gradually over multiple years, rather than all at once.
How it works:
Instead of selling the entire position in one year (and taking the full tax hit at once), you sell portions over several years. This spreads the capital gains — and the associated tax — across multiple tax years, which can:
- Keep you in lower capital gains tax brackets each year
- Avoid a single large spike in taxable income
- Reduce the risk of crossing thresholds (like higher capital gains rates or Medicare IRMAA tiers) in any one year
- Steadily reduce your concentration risk over time
The balance it strikes:
Gradual selling balances the two sides of the tension: you're reducing your concentration risk (progressively, each year) while managing the tax cost (by spreading it out). You don't eliminate the risk immediately, but you steadily reduce it while keeping the tax manageable.
Sizing the annual sales:
How much to sell each year depends on your tax situation — sizing the sales to stay within favorable tax brackets, considering your other income, and coordinating with your overall tax plan. This is where working with a tax professional helps: they can help size the annual sales to manage the tax impact.
Timing considerations:
Gradual selling also lets you be somewhat opportunistic about timing — for example, selling more in lower-income years, or coordinating with other tax moves. The point isn't to time the market (which doesn't work reliably), but to time the tax impact thoughtfully.
The trade-off:
The trade-off of gradual selling is that you retain some concentration risk during the unwinding period — you're not fully diversified until the process is complete. This means accepting some ongoing risk in exchange for managing the tax cost. For most people, this is a reasonable balance, but it's worth understanding that gradual selling reduces risk over time rather than eliminating it immediately.
For Columbus-area retirees and professionals, gradual selling over multiple years is often the cornerstone strategy — steadily reducing concentration risk while spreading and managing the tax cost, sized to your tax situation.
Strategy 2: Offset Gains and Give Strategically
Beyond gradual selling, two strategies can reduce the tax cost of unwinding a concentrated position: offsetting gains with losses, and donating appreciated shares to charity.
Offsetting gains with losses:
If you have investment losses elsewhere in your portfolio, you can use them to offset the capital gains from selling your concentrated position (a form of tax-loss harvesting). Realized losses offset realized gains, so harvesting losses in the same year you sell concentrated stock can reduce or eliminate the net taxable gain. This is a way to sell more of your concentrated position in a given year without as much tax cost. (The wash-sale rule and other details apply, so coordination matters.)
Donating appreciated shares to charity:
For charitably inclined individuals, donating appreciated stock directly to charity is a powerful strategy:
- When you donate appreciated stock (rather than selling it), you generally avoid the capital gains tax on the appreciation entirely
- You may also receive a charitable deduction for the value of the donated shares
- The charity, being tax-exempt, receives the full value
This means you can reduce your concentrated position (by giving away shares) while avoiding the capital gains tax and supporting causes you care about. For those who give to charity anyway, using appreciated concentrated stock to do so is highly tax-efficient.
The donor-advised fund approach:
A donor-advised fund (DAF) makes this practical: you can donate appreciated concentrated stock to the DAF (capturing the deduction and avoiding the capital gains), and then the DAF distributes to your chosen charities over time. This lets you reduce your position and manage your giving flexibly. (I cover DAFs in my tax planning content.)
Gifting to family:
Another option is gifting appreciated shares to family members — which can transfer the position (and its future appreciation) out of your estate, though the recipient generally takes your cost basis, so the embedded gain transfers with the shares. This involves gift tax and other considerations and should be coordinated with a professional.
Combining strategies:
These strategies can be combined — gradual selling, offsetting with losses, and charitable giving can all work together as part of a coordinated plan to unwind a concentrated position tax-efficiently.
For Columbus-area retirees and professionals, offsetting gains with losses and donating appreciated shares (especially through a DAF for the charitably inclined) are valuable tools to reduce the tax cost of diversifying — often combined with gradual selling.
Strategy 3: Special Situations (Company Stock and More)
Some concentrated positions have special characteristics that open up additional strategies. A few worth knowing about.
Company stock in a 401(k) — the NUA strategy:
If your concentrated position is your employer's stock held inside a 401(k), you may be able to use the Net Unrealized Appreciation (NUA) strategy. In brief, NUA can allow the appreciation on company stock to be taxed at long-term capital gains rates (rather than ordinary income rates) when handled correctly at distribution. NUA is a specialized, high-stakes strategy with strict rules, and it's largely irreversible — it has to be done correctly, in the right sequence, before the stock is rolled to an IRA. It's not right for everyone, but for those with significantly appreciated company stock in a 401(k), it's worth evaluating with a professional. (I cover NUA in depth in a dedicated article.)
Inherited stock — stepped-up basis:
If you inherited your concentrated position, the shares generally received a "step-up" in cost basis to their value at the time of inheritance. This can significantly reduce (or eliminate) the embedded gain, making the shares much less costly to sell from a tax standpoint. Inherited concentrated positions are often easier to diversify because of this stepped-up basis — worth confirming with a tax professional.
Exchange funds:
For very large concentrated positions, exchange funds (also called swap funds) are a specialized vehicle that lets investors pool concentrated positions to achieve diversification while deferring the capital gains tax. These are complex, have specific requirements and drawbacks (including holding periods and eligibility limits), and aren't appropriate for most people, but they exist as a tool for large positions. This is specialized territory requiring professional guidance.
Options-based strategies:
There are also options-based strategies (like collars or covered calls) that some investors use to hedge or manage a concentrated position. These are complex, carry their own risks and costs, involve their own tax treatment, and aren't appropriate for everyone. They should only be considered with professional guidance and a clear understanding of the risks — they're not a simple solution.
The specialized nature:
These special-situation strategies are more complex and situation-specific than gradual selling and charitable giving. They're worth knowing exist, but they require professional evaluation to determine if they fit your situation. The right approach depends heavily on the specifics of your position and your tax situation.
For Columbus-area retirees and professionals, special situations — especially NUA for company stock and stepped-up basis for inherited stock — can significantly affect the best strategy, which is why professional, coordinated advice matters when unwinding a concentrated position.
The Emotional Side of Letting Go
Managing a concentrated position isn't just a financial and tax challenge — it's often an emotional one. Recognizing the emotional dimension is part of managing it well.
Why we get attached:
People become attached to concentrated positions for understandable reasons:
- It's done well — a stock that's been a great performer feels like a winner you shouldn't abandon
- It's familiar — especially company stock, tied to your career and identity
- It's sentimental — inherited stock connected to a loved one
- Selling feels like a mistake — if it keeps rising after you sell, you'll regret it
- Loss aversion and taxes — the tax cost of selling feels like a loss
How attachment clouds judgment:
These emotions are natural, but they can cloud judgment about the risk. The fact that a stock has done well doesn't reduce its future risk — if anything, a large, appreciated position carries more concentration risk, not less. Attachment can lead people to hold a dangerous concentration far longer than is prudent, rationalizing it because the stock has been good to them.
The "it's different" trap:
People often believe their concentrated stock is different — a uniquely strong company that won't suffer the fate of others. But history is full of "invincible" companies that declined or collapsed. No individual company is immune, and betting your security on the belief that yours is different is exactly the risk to avoid.
Separating the decision from emotion:
Managing a concentrated position well means separating the risk-management decision from the emotional attachment. The question isn't "has this stock been good to me?" (it may have been) — it's "does it make sense to keep this much of my security riding on one company going forward?" That's a forward-looking risk question, not a backward-looking loyalty question.
The value of an outside perspective:
This is an area where an advisor's outside, objective perspective is genuinely valuable. It's hard to be objective about a position you're emotionally attached to. An advisor can help you see the risk clearly, separate it from the emotion, and make a rational decision about diversifying — while respecting the genuine feelings involved.
For Columbus-area retirees and professionals, acknowledging and working through the emotional side of letting go of a concentrated position — separating loyalty and attachment from the forward-looking risk decision — is often as important as the financial and tax strategy.
Building a Plan to Diversify
Pulling it together, managing a concentrated position works best as a deliberate, coordinated plan rather than a one-time decision or ongoing avoidance.
The elements of a plan:
- Assess the position — how concentrated are you, what's the embedded gain, how did it arise, what are its tax characteristics?
- Clarify your goals and risk — how much risk reduction do you need, and how quickly?
- Understand the tax picture — your embedded gains, bracket, and the tools available (with your tax professional)
- Choose the strategies — gradual selling, offsetting with losses, charitable giving, and any special-situation strategies that fit
- Set a timeline — a multi-year plan to unwind the position at a pace that balances risk reduction and tax management
- Execute and adjust — carry out the plan, adjusting as your situation and the tax landscape change
The coordinated approach:
Because managing a concentrated position sits at the intersection of investment strategy and tax planning, it works best with coordination between your financial advisor and tax professional. The investment side (risk reduction, diversification) and the tax side (managing the cost of selling) have to work together.
Where my role fits:
As your advisor, I help assess the concentration risk, build the diversification plan, coordinate the strategies, and provide the objective perspective to work through the decision — while coordinating with your tax professional on the tax specifics. As a fee-only fiduciary, my only interest is in helping you manage the risk well, not in generating transactions.
The overarching goal:
The goal is to reduce your concentration risk deliberately, over a sensible timeline, while managing the tax cost — turning a large, risky, often-emotional position into a diversified portfolio that supports your retirement without betting your security on one company.
For Columbus-area retirees and professionals, building a deliberate, coordinated plan to diversify a concentrated position — balancing risk reduction and tax management over a sensible timeline — is how you address one of the more significant and overlooked risks to your financial security.
Frequently Asked Questions
What is a concentrated stock position?
A concentrated stock position is when a single stock makes up an outsized share of your portfolio — large enough that its performance significantly affects your overall financial security. It often builds up from company stock accumulated over a career, a stock that grew dramatically, or inherited shares. There's no exact threshold, but the principle is: too much of your security riding on one company.
Why is holding a lot of one stock risky?
Because your financial security becomes tied to a single company, and individual companies — even great ones — can suffer serious, permanent declines. The risk is asymmetric: the downside (a devastating loss) is far more damaging than the upside is beneficial, especially in retirement when you can't easily recover. Diversification protects against this; concentration forgoes that protection.
Should I sell my concentrated stock all at once?
Usually not, because selling appreciated stock all at once can trigger a large capital gains tax bill and push you into higher brackets. A common approach is selling gradually over multiple years, which spreads the tax and steadily reduces your risk. The trade-off is retaining some concentration risk during the unwinding period. The right pace depends on your risk and tax situation.
How can I diversify without paying so much tax?
Several strategies help: sell gradually over multiple years to spread the tax, offset the gains with investment losses elsewhere, and donate appreciated shares to charity (which can avoid the capital gains entirely). For company stock in a 401(k), the NUA strategy may help; for inherited stock, a stepped-up basis may reduce the tax. These are often combined and coordinated with a tax professional.
What is the tension in managing a concentrated position?
The tension is between reducing risk and managing taxes. Diversifying (selling the stock) reduces your concentration risk, but selling appreciated stock triggers capital gains taxes. Selling everything at once maximizes risk reduction but also the tax hit; holding everything avoids the tax but keeps the risk. Good strategy navigates between these — reducing risk while managing the tax cost.
Can I donate my concentrated stock to charity?
Yes, and it's a powerful strategy for the charitably inclined. Donating appreciated stock directly to charity generally avoids the capital gains tax on the appreciation, may provide a charitable deduction, and gives the charity full value. Using a donor-advised fund makes this flexible. It lets you reduce your position while avoiding the tax and supporting causes you care about.
What if I inherited the concentrated stock?
Inherited stock generally receives a "step-up" in cost basis to its value at the time of inheritance, which can significantly reduce or eliminate the embedded gain. This often makes inherited concentrated positions much less costly to sell from a tax standpoint, and therefore easier to diversify. Confirm your basis with a tax professional.
What is the NUA strategy?
Net Unrealized Appreciation (NUA) is a strategy for company stock held in a 401(k) that can allow the appreciation to be taxed at long-term capital gains rates rather than ordinary income rates, when handled correctly. It's specialized, high-stakes, has strict rules, and is largely irreversible — it must be done in the right sequence before rolling to an IRA. It's not right for everyone but worth evaluating for significantly appreciated company stock.
Why do people hold onto concentrated positions too long?
Often for emotional reasons — the stock has done well and feels like a winner, it's familiar (especially company stock), it may be sentimental (inherited), selling feels like a mistake, and the tax cost feels painful. These emotions can cloud judgment about the risk. But a stock doing well in the past doesn't reduce its future concentration risk. Separating emotion from the forward-looking risk decision is key.
Do I need professional help to manage a concentrated position?
It's highly advisable. Managing a concentrated position sits at the intersection of investment strategy and tax planning, with significant tax consequences and specialized strategies (NUA, charitable giving, and others). Coordinating with a financial advisor and tax professional helps you reduce the risk while managing the tax cost, and provides objective perspective on an often-emotional decision.
Reduce the Risk, Manage the Cost
For Columbus-area retirees and professionals, a concentrated stock position is one of the more significant and overlooked risks to your financial security — tying too much of your future to a single company. The prudent path is usually to diversify, but the tax cost of selling appreciated stock creates a real tension that has to be navigated thoughtfully.
The pattern that produces better outcomes: recognize the asymmetric risk of concentration (even in a stock that's done well), understand the diversify-vs-taxes tension, and address it with a deliberate plan — selling gradually over multiple years, offsetting gains with losses, donating appreciated shares for the charitably inclined, and using special-situation strategies (like NUA for company stock or a stepped-up basis for inherited shares) where they fit. Work through the emotional side, and coordinate the whole thing with your tax professional.
The goal isn't to sell everything immediately and pay a huge tax bill, or to hold everything and keep a dangerous risk — it's to reduce your concentration risk deliberately, over a sensible timeline, while managing the tax cost. That's how you protect your financial security without betting it on one company.
This is part of my seven-part series on investing during retirement for Ohio retirees. The companion pieces cover the big-picture overview, how much risk to take, the role of bonds and cash, asset allocation vs. location, avoiding behavioral mistakes, rebalancing, and investment costs — all coming soon in this series.
At Blue Advisors, I help Columbus-area retirees and professionals manage concentrated stock positions — assessing the risk, building a tax-efficient diversification plan, and providing objective perspective — coordinated with my clients' tax professionals on the tax specifics. Blue Advisors is a fee-only fiduciary registered investment advisory firm based in Columbus, Ohio, and as a fee-only fiduciary, my only interest is in helping you manage the risk well.
Schedule a conversation: If you're a Columbus-area retiree or professional holding a large position in a single stock, you can book an introductory call here: calendly.com/jimblue/blue-advisors-meeting.
By James Blue, Fee-Only Advisor | Blue Advisors
James Blue is the founder of Blue Advisors, a fee-only registered investment advisory firm based in Columbus, Ohio, serving retirees, pre-retirees, and busy professionals across Central Ohio and nationally.
This content is provided for informational and educational purposes only and should not be construed as personalized investment, tax, or legal advice. All investing involves risk, including the possible loss of principal; a concentrated stock position carries heightened, company-specific risk, and past performance of any stock is not indicative of future results. Diversification does not guarantee a profit or protect against loss. The strategies discussed — including gradual selling, tax-loss harvesting, charitable giving, gifting, NUA, exchange funds, and options-based strategies — are complex, carry their own risks, tax consequences, and eligibility requirements, are not suitable for everyone, and are presented for educational purposes only, not as recommendations. NUA is a specialized, largely irreversible strategy with strict requirements. Options strategies involve significant risk and are not appropriate for all investors. Tax rules change and depend on individual circumstances. Blue Advisors is a fee-only registered investment advisory firm and is not a tax preparation firm or law firm. Readers should consult a qualified financial advisor and a qualified tax professional regarding their specific situation before acting. The views expressed are those of the author as of the date published and are subject to change without notice. Advisory services are offered only pursuant to a written advisory agreement and to clients in the State of Ohio, the Commonwealth of Pennsylvania, and other jurisdictions where Blue Advisors is properly registered or exempt from registration.