When a software engineer’s startup went public, his equity position was worth $3.2 million, roughly 85% of his net worth. He watched it climb to $4.1 million and held, convinced it would reach $5 million. Then competition intensified, and a disappointing earnings report arrived. The stock fell 60% in six months, leaving him with $1.2 million.

This scenario is not unique to technology. Employees at any public company, including financial services, healthcare, consumer brands, energy, and manufacturing, can find themselves in the same position: wealth that took years to accumulate, concentrated in a single employer, vulnerable to events entirely outside their control. The concentration that built the wealth becomes the mechanism by which it is lost.

A concentrated stock position is generally defined as a single holding that represents more than 20% of your net worth. Below that threshold, concentration is a portfolio tilt. Above it, you are exposed to company-specific risk in a way that no amount of belief in the company’s prospects can fully justify.

This guide explains how to think about concentration risk, when and how to diversify, which strategies apply to different situations, and how to manage risk in a tax-efficient way.

Why Concentrated Positions Are Riskier Than They Feel

Concentrated positions rarely feel dangerous when things are going well. Familiarity with the company, its products, strategy, and leadership can create a sense of informed confidence that obscures the actual level of risk. But familiarity is not the same as safety, and the feeling of control is not the same as actual control of outcomes.

The historical record for individual stocks is sobering. Meta fell approximately 75% from its 2021 peak to its October 2022 trough. Netflix declined roughly 75% from peak to trough over the same period. These were not struggling companies; they were dominant market leaders undergoing corrections that wiped out years of gains for concentrated shareholders.

The mathematics of loss can compound the problem. A stock that falls 50% requires a 100% gain just to return to breakeven. A 75% decline requires a 300% gain. Time spent recovering is time not compounding on a diversified portfolio.

For employees, the risk is intensified by double concentration: your paycheck and your investment portfolio are both dependent on the same company’s health. An event that affects the stock, such as an earnings miss, a leadership transition, a regulatory challenge, or a competitive disruption, can simultaneously threaten your income and your net worth.

When Concentration Becomes a Priority

The appropriate threshold varies by total wealth, income stability, and risk tolerance, but a practical starting point is this: when a single stock accounts for more than 20% of your net worth, concentration risk warrants attention. When it exceeds 40–50%, it warrants a plan.

Certain circumstances make the case for action more urgent: when you are within a few years of a major financial goal; when company fundamentals are deteriorating; when your income is also tied to the same employer; or when a significant portion of your concentration comes from unvested awards, meaning your true exposure is higher than current holdings suggest.

Types of Concentrated Positions and Their Planning Implications

Not all concentrated equity is the same. The tax treatment, liquidity constraints, and planning strategies differ meaningfully depending on how the position was built.

Restricted Stock Units (RSUs)

RSUs vest as ordinary income; the full value at vest is taxable as wages, regardless of whether you sell. This creates an immediate concentration decision at each vest event: hold or diversify. The vesting schedule itself perpetuates concentration, because new grants arrive while old ones vest, continuously rebuilding the position if no shares are sold. Any appreciation after vest is treated as capital gains at sale. For a detailed breakdown of RSU taxation, see our complete RSU tax guide.

Incentive Stock Options (ISOs) and Non-Qualified Stock Options (NSOs)

ISOs offer preferential tax treatment if the holding period requirements are met (two years from grant and one year from exercise). However, they can trigger Alternative Minimum Tax at exercise, even before shares are sold. AMT paid on ISO exercises may generate credits usable in future years, but timing mismatches can still create illiquidity risk. The 90-day exercise window after leaving a company forces decisions that are often made under pressure. NSOs are simpler: the spread between exercise price and fair market value is taxed as ordinary income at exercise. For a full comparison, see our ISO vs. NSO guide.

Pre-IPO Equity

Pre-IPO positions present both illiquidity and valuation uncertainty. Secondary market transactions are possible but are subject to restrictions and limited buyer demand. For early-stage employees, early exercise paired with an 83(b) election can lock in a low tax basis when the 409A valuation is still modest, starting the capital gains clock and reducing the amount subject to ordinary income tax if the company succeeds.

Post-IPO Lockup Positions

The 180-day post-IPO lockup period concentrates risk precisely when it feels most acute: the company is newly public, the stock is often volatile, and you cannot sell. Lockup expiration is historically accompanied by additional selling pressure as restricted shares enter the market. Having a clear plan for the first trading window, rather than making ad hoc decisions, is one of the highest-value planning opportunities in equity compensation.

When to Diversify

For most people, systematic diversification that’s tied to a schedule rather than a price target is more reliable than market timing. Waiting for “the right price” is itself a form of market timing, and it can introduce the same emotional dynamics that led to the concentration persisting longer than it should have.

At Each RSU Vest

Each vest event is a natural decision point. A common approach is to sell enough at each vest to cover the tax liability, plus an additional percentage for diversification. Building a schedule tied to the vesting calendar converts an ongoing emotional decision into a pre-committed plan.

After IPO Lockup Expiration

The first 6–12 months post-IPO are among the most consequential for employees with significant equity. A staged selling approach that spreads sales over three to six months, rather than selling all at once at lockup expiration, reduces both timing risk and the price impact of a large concentrated sale.

Before Major Financial Milestones

Reducing a concentrated position 2–3 years before a significant financial need, such as retirement, a property purchase, or funding education, is more prudent than planning to sell when the need arises. Forced selling on a fixed timeline, regardless of market conditions, eliminates the flexibility to manage taxes or timing.

When Company Fundamentals Change

Leadership transitions, sustained market-share erosion, competitive disruption, or valuations that have moved well beyond historical norms are legitimate prompts to accelerate diversification. An outside perspective from an advisor with no emotional stake in the company’s success can be valuable here.

Tax-Efficient Diversification Strategies

Taxes are the primary friction in diversifying a concentrated position, and they deserve serious planning attention. That said, paying 20–37% in capital gains tax is almost always preferable to watching a position decline 50–75% while waiting for a better time to sell. The goal is not to avoid taxes entirely but to minimize them through intelligent sequencing and coordination.

Long-Term vs. Short-Term Capital Gains

Shares held for more than 12 months qualify for long-term capital gains rates, which for most high earners are 15–20% federally. Shares held for 12 months or less are taxed as ordinary income—up to 37% federally, plus applicable state taxes. For ISOs, the holding periods are more complex: two years from grant and one year from exercise for qualifying disposition treatment. In high-tax states, the difference between long-term and short-term treatment can exceed 20 percentage points, making the holding period calculation genuinely important.

Tax-Loss Harvesting

Capital losses from other portfolio positions can offset capital gains from concentrated stock sales dollar-for-dollar, with no annual cap on the offset. Up to $3,000 of net losses can additionally offset ordinary income annually, with unlimited carryforward. Building a tax-loss bank in the broader portfolio by systematically harvesting losses from diversified holdings creates the capacity to offset gains from concentrated stock sales in the same or future years.

Charitable Giving with Appreciated Shares

Donating appreciated shares directly to a charity or donor-advised fund avoids capital gains tax entirely on the donated amount, while generating a charitable deduction at the full fair market value. This is more tax-efficient than selling shares and donating the proceeds in cash. In a high-income year when a large charitable deduction has its greatest value, this strategy can combine meaningful philanthropic impact with significant tax savings.

Multi-Year Staging

Spreading sales across two to four calendar years—coordinated with expected income, RSU vesting, and other taxable events—can prevent bracket compression and keep gains taxed at lower rates. This requires planning ahead rather than reacting to market conditions.

Advanced Strategies for Large or Complex Positions

For very large positions where outright selling would generate prohibitive immediate tax liability, several more sophisticated strategies exist. These involve meaningful complexity and cost, and require experienced professional guidance to be implemented appropriately.

Rule 10b5-1 Trading Plans

A Rule 10b5-1 plan is a pre-scheduled selling program that allows corporate insiders (and in some cases employees) with access to material non-public information to sell shares on a predetermined schedule, including during blackout periods when discretionary selling would otherwise be prohibited. The plan must be established during an open trading window, before the seller possesses any material non-public information, and is subject to SEC-mandated cooling-off periods before the first trade can execute.

The practical value is twofold: it enables systematic diversification that would otherwise be constrained by trading windows, and it provides a legal safe harbor, eliminating uncertainty about whether a given sale is compliant. Employees in finance, legal, or executive functions, or anyone with regular access to material non-public information, should assess whether a 10b5-1 plan is appropriate for their situation.

Downside Protection and Hedging Strategies

Derivative structures can provide meaningful downside protection for shares that are not being sold in a given year through a systematic diversification plan. This is an important distinction: hedging and selling are complementary tools, not mutually exclusive alternatives. A well-designed selling schedule addresses concentration over time; a hedging structure protects the shares that remain concentrated in the interim.

One approach that Lido employs, “Cap and Cushion,” uses a combination of options positions to create a defined protection range, cushioning losses below a certain threshold while retaining participation in upside up to a cap. A key feature of this structure is that the cost of the downside protection can be largely offset by the value of the upside cap, meaning the protection can be self-financing. For a long-term holder who is genuinely bullish on the company and willing to wait out a decline, this framing is worth considering. The protection doesn’t come out of pocket, as long as the holder is comfortable not capturing gains above a defined ceiling.

The proceeds generated when the hedge pays off, whether during a market-wide correction, a sector selloff, or an idiosyncratic event, are available as liquid capital while the underlying position recovers. For a holder who is comfortable with the idea that their stock will recover over time, this reframes the question: not whether to hold, but whether it makes sense to have additional capital available while waiting. Those proceeds can be used to cover living expenses, pay taxes on shares sold that year, or simply provide financial stability during a period of stock price weakness.

A few practical considerations apply. Some employers restrict employees from directly hedging company stock while employed, so plan documents and company trading policies should be reviewed before implementing any derivative strategy. Additionally, liquid options markets may not exist for all stocks, particularly smaller-cap names where trading volume is limited. These constraints are worth assessing early in the planning process.

Exchange Funds and Synthetic Exchange Strategies

A traditional exchange fund allows an investor to contribute a concentrated stock position to a pooled fund alongside other investors with different concentrated positions, receiving in return a proportional interest in the diversified pool without triggering an immediate taxable sale. The primary benefit is tax deferral combined with broad diversification. The primary constraints are a seven-year lockup requirement, annual management fees, and limited liquidity during the lockup period.

For investors for whom a traditional exchange-traded fund is not accessible or appropriate, synthetic strategies can achieve a comparable objective by transferring the risk profile of an individual stock position to a broader market index through derivative overlays, without requiring a taxable sale or a multi-year illiquidity commitment. The right approach depends on position size, liquidity needs, and the specific risk transfer objective.

Qualified Small Business Stock (QSBS)

Section 1202 of the Internal Revenue Code provides a capital gains exclusion for qualifying small business stock held for the required period. The One Big Beautiful Bill Act, enacted July 4, 2025, significantly expanded Section 1202. For stock issued after enactment, it introduced tiered gain exclusions of 50% after three years, 75% after four years, and 100% after five years. It also increased the per-issuer exclusion cap to $15 million and raised the gross-asset threshold to $75 million. The rules are complex and highly fact-specific, so QSBS eligibility should be reviewed before any sale.

Opportunity Zone Investments

Capital gains from a concentrated stock sale can be deferred by reinvesting the gain amount into a Qualified Opportunity Zone fund within 180 days of the sale. Gains on the Opportunity Zone investment itself may be reduced or eliminated if the position is held for ten or more years.  The risks deserve scrutiny. Opportunity Zone funds typically carry high fee structures, illiquid and difficult-to-value underlying assets, and limited exit options before the ten-year mark. Fund manager quality varies widely, and the underlying economic risk of investing in designated distressed zones is real. The tax benefits are genuine, but they should be weighed against these structural constraints and the availability of simpler, more liquid alternatives.

Common Mistakes in Concentrated Stock Planning

Most costly errors in concentrated stock management are behavioral rather than technical. They stem from emotional attachment, aversion to regret, and a persistent belief that the future will resemble the recent past.

• Waiting for a price target before selling. The stock may never reach the target, and the waiting period adds months or years of uncompensated concentration risk.
• Treating the decision as all-or-nothing. Systematic partial diversification captures meaningful risk reduction without requiring conviction that the stock has peaked.
• Ignoring tax planning until after the decision to sell. Tax strategy must precede execution, not follow it.
• Conflating familiarity with safety. Knowing the company well does not reduce its stock price volatility or insulate the position from sector-wide events.
• Underestimating true exposure by ignoring unvested awards. The full concentration risk includes unvested RSUs, unexercised options, and expected future grants.
• Selling during a blackout period without a 10b5-1 plan in place. For employees subject to trading restrictions, unplanned selling can create legal exposure that far exceeds any financial benefit.
• Recreating concentration through index funds and ETFs. An investor who sells a portion of a large-cap position and reinvests in a broad market index fund may be buying significant additional exposure to the same name through the back door. For mega-cap stocks that represent a meaningful weight in major indices, this can partially offset the intended diversification. Proper portfolio construction should account for existing concentrated exposure when selecting reinvestment vehicles.

Building Your Diversification Plan

Assess Your Actual Concentration

Start with a complete picture: vested shares, unvested RSUs, unexercised options at current spread, and expected future grants. Express each as a percentage of total net worth, including all assets. Include the income dependency dimension: if your salary, bonus, and equity are all tied to the same employer, your effective concentration is higher than the portfolio percentage alone suggests.

Set a Target and Timeline

A practical target for most situations is to reduce the position to 10–20% of net worth over 12–24 months, using a staged selling schedule tied to vesting events, trading windows, and tax planning milestones. The exact target and timeline should reflect your total wealth, income stability, proximity to financial goals, and risk tolerance.

Coordinate with Your Tax Professional Before Executing

Every sale has tax consequences that depend on holding periods, other income, state of residence, and available offsets. The sequencing of which lots to sell, when to sell them, and how to coordinate with other taxable events can meaningfully affect the after-tax outcome. Model the full tax picture before executing any sale.

Work with a Coordinated Advisory Team

Effective concentrated stock planning typically requires coordination across several disciplines: a financial advisor for diversification strategy and portfolio construction, a CPA for tax modeling and optimization, and, in some cases, an estate attorney for wealth transfer planning. When these professionals work in silos, decisions in one area can create unintended consequences in another. Integrated planning, where everyone is working from the same set of facts and goals, typically produces materially better outcomes.

How Lido Advisors Approaches Concentrated Stock Planning

At Lido Advisors, concentrated stock planning begins with a full quantitative assessment of the position: current concentration as a percentage of net worth, unvested exposure, tax basis by lot, trading window constraints, and any 10b5-1 requirements. From that foundation, we build a multi-year tax-efficient diversification roadmap with a clear schedule tied to vesting events, trading windows, and income planning milestones.

For clients subject to insider trading restrictions, we coordinate trading plan setup and management. For positions requiring downside protection in the interim, meaning shares that are not being sold in a given year but remain meaningfully concentrated, we design hedging structures that provide defined protection while being largely self-financing through an upside cap. For investors seeking risk transfer without a taxable sale, we implement synthetic exchange strategies that achieve diversification objectives using derivative overlays, without the illiquidity of a traditional exchange fund structure. On the reinvestment side, we employ custom indexing intended to ensure proceeds are redeployed into portfolios that do not simply recreate the same exposure through index-fund holdings. 

Perhaps the most important thing we provide is an objective perspective. Concentrated positions oftentimes generate genuine emotional attachment to the company, the gains already realized, and the possibility of gains still to come. That attachment is understandable, but it is not a substitute for a plan. Our role is to help ensure that financial analysis is rigorous and that decisions are made deliberately rather than by default.