How an Executive Set a Sell Schedule for a Concentrated Stock Position
Sam's List Editorial | 2026-08-31
The hardest part of a concentrated stock position sell schedule is not the math. It is deciding to sell anything at all.
This is an illustrative case study. It is a composite of patterns that recur in executive equity planning, not a report on any individual client, and nothing here is a recommendation or a prediction of results for anyone else.
The Starting Picture
A 51-year-old operations executive at a publicly traded company, fourteen years in, with restricted stock units vesting on a rolling schedule and an employee stock purchase plan she had participated in from day one.
Roughly 64 percent of her investable net worth sat in her employer's stock. She knew the number. She had known it for four years.
Every year the plan was to trim. Every year the stock did something that made trimming feel wrong. When it ran up, selling felt like leaving money on the table. When it pulled back, selling felt like locking in a loss. There was never a good day.
Separating Two Questions That Kept Getting Tangled
The first thing that changed was pulling apart two questions that had been arguing with each other.
The concentration question: how much of one company's fortunes should determine your retirement? Her salary, her bonus, her health insurance, and 64 percent of her portfolio all depended on the same employer. A bad outcome at the company would arrive in every part of her life at once.
The tax question: what does it cost to reduce that exposure? Long-held shares carried large embedded gains. ESPP shares had their own holding period rules that changed whether the discount was taxed as ordinary income or capital gain.
She had been letting the second question veto the first. Framed properly, they are sequential rather than competing: decide what concentration you can live with, then find the least expensive path to get there.
Why a Written Sell Schedule Beat a Gut Call on a Concentrated Stock Position
Executives are not free to sell whenever they want. Trading windows open after earnings and close before the next quarter's information starts accumulating. Blackout periods land at inconvenient times. And an executive who is aware of material nonpublic information has a problem no calendar solves.
A pre-established written trading plan under Rule 10b5-1 exists for exactly this. Adopted at a time when the person does not possess material nonpublic information, it sets the amount, price, or timing of future trades in advance, and it provides an affirmative defense against insider trading claims if the conditions are met.
The conditions are specific. Under the SEC's amended rule, persons other than directors and officers face a 30-day cooling-off period between adopting or modifying a plan and the first trade. Directors and officers face the later of 90 days or two business days after the company files the 10-Q or 10-K for the quarter in which the plan was adopted, capped at 120 days. Changing the amount, price, or timing counts as terminating the plan and adopting a new one, which restarts the cooling-off clock.
That last detail is the one that disciplines the process. If you cannot casually adjust the plan when the stock moves, you stop trying to time it, which was the behavior keeping her stuck.
Whether a 10b5-1 plan is available and appropriate depends on the individual's role, the company's own insider trading policy, and legal counsel. It is not a self-service decision.
Sizing the Concentrated Stock Position Sell Schedule Against an Allocation
The schedule was built backward from a target, not forward from a hope.
She set a concentration ceiling she could genuinely live with and worked out how many quarters of steady selling it would take to get there without producing one enormous tax year. Newly vesting RSUs were folded into the plan by default, on the reasoning that RSUs at vest are effectively a cash bonus she was choosing to reinvest in her employer every quarter.
The trigger was the calendar and the allocation, not the price. That is the deliberate part. A price target reintroduces the same judgment call that had paralyzed her for four years.
The Trade-Offs, Stated Plainly
Diversifying is not free and it is not obviously right.
Taxes come due. Selling appreciated shares creates a capital gains liability that would not exist if she held, and multi-year sequencing manages that cost rather than eliminating it.
The upside gets surrendered. If the stock triples over the next decade, a diversified portfolio will almost certainly lag it, and she will know exactly what the decision cost. Reducing the range of outcomes cuts off the good tail along with the bad one.
Diversification is not protection. A broadly diversified portfolio still loses money in bad markets. It changes the shape of the risk, not the presence of it.
And there is no way to know in advance whether this was the right call. That is what makes it a risk decision rather than an optimization problem.
Where an Advisor Fits
This kind of decision sits between a plan administrator who executes but does not advise, a CPA who typically sees the transaction after it happened, and legal counsel who reviews the plan but does not build the financial picture.
Ian Weiner is a CFP professional and Certified Exit Planning Advisor listed on Sam's List, based in Bentonville, Arkansas, with a practice founded in 2019 that serves clients nationwide. The practice describes itself as a personal CFO for owners, executives, and families, with a stated focus on irreversible decisions such as sales, exits, equity compensation, and inheritance. That category of practice is built around situations where one election cannot be undone, which is what a concentrated position becomes once you start unwinding it.
The profile lists a $1 million investable asset minimum, and it currently shows a small number of client reviews, so we are describing the practice by its stated focus and credentials rather than by review volume. Credentials on Sam's List are self-reported, and the platform states it verifies through FINRA BrokerCheck, the CFP Board, and IRS databases where applicable.
Ask any advisor how they are compensated and whether their compensation changes based on the recommendation, which is a live question whenever assets move out of one place and into another. Confirm licensing and fit yourself, coordinate the tax side with your own CPA, and clear any trading plan with your company's counsel before adopting it. You can compare advisors by specialty, location, and client reviews in the Sam's List financial advisor directory.
Frequently Asked Questions
How much employer stock is too much? There is no universal threshold, and reasonable planners disagree. What matters more than a percentage is how many parts of your life depend on the same company, since salary, bonus, benefits, and portfolio can all be exposed to one outcome. Decide what concentration you could live through in a bad scenario, then work toward it.
What is a Rule 10b5-1 plan? It is a written trading plan adopted while the person does not possess material nonpublic information, specifying the amount, price, or timing of future trades in advance. Meeting the rule's conditions provides an affirmative defense against insider trading claims. Availability and suitability depend on your role, your company's policy, and legal counsel.
How long is the cooling-off period for a 10b5-1 plan? For persons other than directors and officers, 30 days after adoption or modification. For directors and officers, the later of 90 days or two business days after the company files its 10-Q or 10-K for the quarter of adoption, capped at 120 days. Modifying the amount, price, or timing restarts the clock.
Should I sell all at once or over time? Selling over a defined schedule spreads the tax effect across years and removes the pressure to pick a moment, while selling at once reduces exposure faster and locks in the current tax cost. Neither is universally better. The right answer depends on your tax situation, your timeline, and how much single-company risk you are prepared to carry meanwhile.
About the author: Kimberly Green is the cofounder of Sam's List, where business owners and high earners find vetted CPAs, financial advisors, and fractional CFOs. She's met one-on-one with 400+ financial professionals and writes from the real data behind thousands of client-advisor matches. Ask her anything about finding an accountant - she's heard it all, including the questions people are afraid to ask.