Concentrated Stock Positions: How to Sell, Hold or Diversify

Study overview

This guide draws on Long Angle's 2026 High-Net-Worth Asset Allocation Report (233 respondents, average net worth $17M), two community polls of 286 and 296 respondents, and patterns from member discussions about selling, holding and diversifying a single stock. The full guide runs seven chapters and ends with a decision worksheet. Members quoted or described here are anonymous.

This guide is for education only and is not investment, legal or tax advice. Confirm the rules that apply to your situation with qualified professionals.

What counts as a concentrated stock position

There is no official threshold. Asked the most they would hold in a single stock and still sleep at night, 60% of Long Angle members polled said 15% of net worth or less, and 27% said under 5%. About one in five would hold a quarter or more.

How Much HNW Investors Will Hold in a Single Stock

Source: Long Angle community poll, 286 respondents, December 2025-March 2026. Voluntary poll of members, single answer. Percentages are rounded.

A useful test is the re-purchase question: if you held none of this stock today, what share of your net worth would you put into it at the current price? For many holders the answer is well below what they hold, and the gap is the size of the diversification problem. Not selling is also a decision: holding vested shares is economically the same as taking the cash and buying the stock that day.

How concentrated founders and employees with equity are

On average, founders and business owners hold 35% of their investable net worth in their own company, and private-company employees with equity hold 35% in employer shares. Because members reported against their most recent private valuation, an IPO that prices higher makes the true concentration higher still. So for many holders the figure at the moment of going public is a floor.

Asset Allocation Among Concentrated Equity Holders (% of Investable Net Worth)

Public company employees show a different picture. Employer shares account for 19% of investable net worth, while other public stocks account for 53%. That's consistent with a pattern of selling down concentrated positions after an IPO and reallocating into a broader public equity portfolio. All other HNW investors, who hold no employer equity, show the most diversified profile.

The risks of a concentrated stock position

A concentrated position is usually larger than the brokerage balance suggests. Exposure to one company has three layers: vested shares; unvested awards that depend on the same company and on continued employment; and the salary, future grants and professional standing tied to the same employer. In a downturn all three can fall together.

Restrictions set the timetable. IPO lockups commonly prevent insiders from selling for a period after listing, often 180 days, and company trading windows can apply after the lockup ends. A Rule 10b5-1 trading plan must be adopted before any sale under it can start: directors and officers wait the later of 90 days or two business days after the next quarterly results, capped at 120 days, and other insiders wait 30 days. Holders who have lived through a lockup caution that a plan anchored to the IPO-day price rests on a number that will move before they can act. The decisions that close before a sale are set out in what to do before a liquidity event.

Concentrated stock position strategies: sell, hold, hedge, diversify or give

A concentrated position is rarely resolved by a single sale or a single decision to hold. Holders who have been through a liquidity event usually combine approaches: selling in each trading window, holding a deliberately sized remainder, and moving part of the position into a structure or a charitable gift. The plan works best when it is written before restrictions lift and the price starts moving.

5 Ways to Manage Concentrated Equity

Source: Long Angle, One Stock, Most of Your Net Worth. Holders often combine several approaches.

Selling: what the tax depends on

The cost of a sale depends on the type of equity. When restricted stock units settle, their value is taxed as ordinary income and becomes the cost basis, so a sale soon after settlement realizes little further gain. Employers withhold on that income at the federal supplemental rate of 22% up to $1 million and 37% above it, which can fall well short of the tax owed on a large settlement. The largest capital gains sit in long-held, low-basis shares and exercised options: at the top federal long-term rate of 20% plus the 3.8% net investment income tax, a $1 million gain on near-zero-basis stock owes roughly $238,000 in federal tax before any state tax. Incentive stock options add an alternative minimum tax question at exercise, and 2026 rule changes made that calculation more expensive; the full guide works through it.

Holding: retaining with a plan

Retaining part of a position is a defensible choice when the plan states how much, why and what would change it. The distinction members draw is between holding deliberately and holding by default because selling is uncomfortable, the tax is large or the price has just risen. A common test is to ask what would change for the household if the stock fell 50% and stayed there. One pattern members describe is a pair of limits: vested shares held to a small share of the portfolio, a cap on vested and unvested combined, and sales on a sliding scale whenever the combined figure rises above the cap.

Hedging without selling

Options can reduce the downside while keeping the shares. A protective put sets a floor for the cost of the premium. A collar pairs a purchased put with a sold call, and a zero-cost collar removes the premium outlay in exchange for capping gains above the call strike. Each needs a liquid options market in the stock, which a newly listed company may not have, and many companies restrict hedging by employees and insiders.

Exchange funds and 351 exchanges for concentrated positions

Two structures exchange a concentrated position for a diversified one without a taxable sale: exchange funds and 351 exchanges. Both defer the gain rather than remove it: the original cost basis carries into the new holding.

Structures for Diversifying Without a Taxable Sale

Source: Long Angle, One Stock, Most of Your Net Worth. Confirm eligibility and terms with the sponsor and a tax advisor.

The eligibility tests apply to the portfolio each investor contributes, so for a holder whose position is most of their portfolio, the 351 test is often the deciding factor, and the stock may qualify only alongside other holdings. Exchange funds face a different limit: when many employees of one newly public company want to diversify at once, sponsors may cap how much of that stock they accept. Our comparison of 351 exchanges and exchange funds covers both in more detail.

Deferral carries its own assumptions: that tax rates do not rise, that fees and lockups are worth the benefit, and that the holder understands what they own. Several members describe declining a structure after weighing those costs against the value of the deferral.

Offsetting gains with direct indexing

Direct indexing holds the individual stocks in an index so losses on single positions can be realized and used against gains from selling down a concentrated position. Members who use it report that the harvesting opportunity declines over time, and that a single lump sum invested at once starts with less to harvest than steady contributions.

Direct Indexing Adoption Among High-Net-Worth Investors

Source: Long Angle community poll, 296 respondents, June-September 2026. Voluntary poll of members, single answer.

For more, see Long Angle's direct indexing research.

How to unwind a concentrated stock position: a common sequence

1. A partial sale with the tax paid, sized to cover several years of spending and to take a collapse in the stock off the table for the household.
2. Charitable gifts of appreciated shares, for households that already intend to give.
3. A deferral structure for part of the position, where it qualifies.
4. A scheduled sale of the remainder across several tax years, on rules set in advance.
5. A retained position held deliberately, sized so that a total loss would not change the household's plans.

Holders who set a schedule keep it mechanical. One Long Angle member sells a fixed fraction each month, one divided by the number of months left in the plan, so the pace does not change with the price. Members also describe the regret of plans anchored to the IPO-day price or the peak, and say removing the largest risk early was worth more than minimizing the tax on every share.

Giving appreciated shares

For households that already intend to give, donating appreciated shares held more than a year generally allows a deduction at fair market value without realizing the gain, which selling first and giving cash does not. Gifts of appreciated securities to public charities are deductible up to 30% of adjusted gross income, with the excess carried forward. A donor-advised fund lets a household fund several years of intended giving in a high-income year and choose the charities later.

What the full guide covers

The full guide, One Stock, Most of Your Net Worth, runs seven chapters:

1. The adjustment period after equity becomes valuable
2. Knowing what you hold
3. Selling, retaining or diversifying
4. The tax wall, including the 2026 AMT changes and qualified small business stock
5. Charitable giving
6. The first year and which advisors to bring in
7. What changes around you

It ends with a decision worksheet for recording the position, its restrictions, the next deadline, an after-tax estimate and the sale and retention plan.

Methodology and limitations

Holdings figures come from Long Angle's 2026 High-Net-Worth Asset Allocation Report, the fifth annual edition, which surveyed 233 Long Angle members with an average net worth of $17M between December 2025 and January 2026 through self-reported allocations. The single-stock limit comes from a community poll of 286 respondents (December 2025 to March 2026) and the direct indexing figures from a poll of 296 respondents (June to September 2026). All are voluntary samples.

Member experiences are reported as patterns from community discussions, and are not recommendations. This page is for education only and is not investment, legal or tax advice. Confirm the rules that apply to your situation with qualified professionals.