Managing Concentrated Employer Stock: An Executive Guide

Charlotte runs on companies that pay their leaders in stock. Banks, utilities, and industrials — the sectors that anchor the region's economy — use restricted stock units, performance shares, options, and deferred compensation to keep senior people invested in the outcome. It works. It is also how a career's worth of savings quietly ends up in a single ticker.

The concentration is not only financial. Salary, bonus, unvested equity, and benefits rest on the same balance sheet, so a difficult decade at the company does not hit one line of a net worth statement — it hits most of them at once. That is not an argument for selling everything. Employer stock has made a great many people wealthy, and there are real reasons to hold it; it has also concentrated the damage for the people who held on through a company that did not recover. It is an argument for the position having a written plan rather than a running internal debate.

Start with the number

Measure the exposure first: vested shares, unvested RSUs and performance shares, the in-the-money value of options, company stock in the 401(k), and anything accumulated through an employee stock purchase plan, against investable net worth.

In our practice we treat roughly 10% of investable assets in a single stock as the point where a position warrants a written policy rather than benign neglect. That is a discussion threshold we chose, not an industry standard, and plenty of executives sit above it for defensible reasons.

Sometimes the reason is mandatory. Stock ownership guidelines require executives to hold a minimum value of company stock, usually a multiple of base salary and set higher for the CEO. In the NASPP/Deloitte Tax 2025 Equity Administration Survey, 88% of responding companies reported having them, up from 85% in 2020 — though respondents are self-selected and not representative of all public companies. Where one applies, part of the position is unavailable for diversification, and the plan has to be built around that floor.

The withholding gap

The most common and most fixable problem has nothing to do with investment strategy.

When RSUs settle, the value is ordinary compensation income. Many employers withhold using the optional flat supplemental wage rate — 22% for 2026 on supplemental wages up to $1 million per employee per calendar year, with withholding above $1 million mandatory at 37%. Some employers use the aggregate method instead, which gives a different result. Against a 35% bracket, the 22% flat rate is thirteen percentage points short.

Hypothetical illustration; figures are rounded and assume facts that will not match any individual return. An executive vests $400,000 of RSUs. Flat withholding at 22% covers $88,000. Depending on her other income the vest may be taxed across the 32%, 35%, and 37% brackets; at a blended 35% the federal tax would be roughly $140,000, leaving a shortfall on the order of $50,000. Her employer separately withholds the 0.9% Additional Medicare Tax on wages above $200,000, and North Carolina withholds 4.09% on supplemental wages for 2026 against a 3.99% rate, so the state side is generally covered. The federal gap is the one that appears in April.

Know the estimated tax safe harbor: for 2026 the underpayment penalty is generally avoided by paying, through withholding and timely quarterly installments, at least 90% of the current year's tax or 100% of the tax shown on the prior-year return — 110% if the adjusted gross income on that return exceeded $150,000. Because estimated payments count when made rather than ratably, a fourth-quarter vest can leave earlier installments short even when the annual total is right.

Then look at where the vest lands you, not only what it is worth: a large vest can push modified AGI into ranges where deductions phase out and the effective marginal rate runs above the headline bracket. That is the case for modeling the year, not just the vest.

Know which instrument you hold

"Equity comp" covers at least four different tax animals.

Restricted stock units produce ordinary income when shares are delivered. Payroll taxes can come earlier: under the special timing rule for deferred compensation, FICA is generally taken when the award is no longer subject to a substantial risk of forfeiture, which for retirement-eligible executives is often years before delivery. A Section 83(b) election cannot be made on the grant of an RSU, because Treasury regulations exclude an unfunded, unsecured promise to pay from the definition of property; if an award settles into substantially nonvested stock, the analysis differs. Read the agreement, not the label. Once shares are delivered, basis equals the value taxed, and the useful question becomes: if this had arrived as a cash bonus, would I buy company stock with it today? For many executives the honest answer is no, which argues for selling at vest as the default and holding as the deliberate exception. For others — those under ownership guidelines, those with a considered view of the business, those managing a particular tax year — the answer is yes. Either way, asking makes holding a decision rather than a default.

Nonqualified stock options produce ordinary income on the spread at exercise, with basis reset to the exercise-date value. The question is which year to recognize it.

Incentive stock options surprise people. Exercising and holding produces no regular taxable income but creates an alternative minimum tax adjustment equal to the spread — and that matters more in 2026 than in 2025. Public Law 119-21, enacted July 4, 2025, lowered the AMT exemption phaseout thresholds to $500,000 for single filers and $1,000,000 for joint filers, down from $626,350 and $1,252,700, and doubled the phaseout rate from 25% to 50%. Both changes pull more exercises into AMT, so a large exercise deserves a projection beforehand.

Employee stock purchase plans are widely available and widely misunderstood. A qualified plan may price shares as low as 85% of the lesser of the offering-date or purchase-date value, and the $25,000 annual limit is measured by grant-date value, not by contributions. On a qualifying disposition — more than two years from the offering date and more than one year from purchase — ordinary income equals the lesser of your actual gain or the grant-date discount, with any remainder taxed as long-term capital gain. If the stock has not appreciated past that discount, most or all of the gain stays ordinary. Sell earlier and the bargain element at purchase is ordinary income even if the shares are later sold at a loss.

Deferred compensation is also a credit decision

Nonqualified deferred compensation is common at banks and utilities and is usually presented as a tax deferral. It is also an extension of credit: to avoid current taxation, deferred amounts must remain subject to the claims of the employer's general creditors, making you an unsecured creditor of your own company for money already earned. Where the concentration analysis already shows heavy exposure to one balance sheet, a large deferral adds to it.

The mechanics are unforgiving. Under Section 409A the election to defer next year's compensation generally must be made before this year ends; the distribution schedule is set up front; a later change generally cannot take effect for twelve months and must push payment out five more years; and public company executives classified as specified employees face a six-month delay on payments triggered by separation from service. A failure triggers income inclusion, a 20% additional tax, and a premium interest charge. These are December decisions.

If you are an insider, the calendar governs

Directors and Section 16 officers work under constraints that are a reason to plan earlier, not to plan less.

A Rule 10b5-1 plan is the standard tool. Adopted while not aware of material nonpublic information and meeting the rule's other conditions — good faith at adoption and afterward, the cooling-off period, the director and officer certification, and limits on overlapping and single-trade plans — it can support an affirmative defense that a later trade was not made on the basis of material nonpublic information. That is a defense to be established, not a guarantee against inquiry, and any plan belongs in front of your own counsel and your company's legal department. For directors and officers the cooling-off period runs until the later of 90 days after adoption or two business days after the company files the periodic report covering the quarter of adoption, capped at 120 days, and a change to the amount, price, or timing of trades restarts it. The plan you wish you had is one you needed to sign a quarter earlier.

Three constraints belong on the same page. Affiliates remain subject to Rule 144's current public information, volume, and manner-of-sale conditions even when the shares are not restricted, and must file a Form 144 for any sale above 5,000 shares or $50,000 within three months. Section 16(b) makes a purchase and sale occurring within any period of less than six months matchable, with the profit recoverable by the company regardless of intent — which is why an ESPP purchase or option exercise sitting near a sale deserves a look. And since late 2023, listing standards under Rule 10D-1 have required companies to recover, without regard to fault, excess incentive-based compensation paid to executive officers in the three years before a required restatement.

Put it on a calendar

Map the vest dates, purchase dates, option expirations, blackout windows, and the December deferral deadline onto one twelve-month view, and set the policy before the dates arrive. Measure, decide, schedule — in that order.

We work with executives in Charlotte and beyond, and if you have never done that, it is the place to start. We are glad to walk through your situation, without obligation. Schedule a conversation