How to Manage Concentrated Stock After an IPO: A Decision Framework

After an IPO, you’ll be inundated with advice.

“Sell and diversify.”

“Hold — you know the company better than anyone.”

“Hedge it.”

“Do nothing and let it ride.”

There’s a potentialwith all of the above (likely unsolicited) recommendations. They’re knee-jerk reactions that aren’t tailored to your financial situation whatsoever. Even inaction is a decision that can have

If a single stock accounts for a substantial portion of your net worth, that balances investment strategy, taxes, timing, risk tolerance, and long-term goals.

Let’s explore how to develop one.

Step 1: Acknowledge the Risk

A concentrated stock position is typically the byproduct of success. But it’s still a risk.

Your future becomes tethered to factors outside your control: market sentiment, earnings cycles, regulatory changes, leadership shifts, and broader economic conditions. Even strong, profitable companies with healthy cash flow experience volatility.

The challenge is equally psychological.

It’s easy to anchor on today’s stock price. To extrapolate past performance into the future. To feel that selling shares somehow signals a lack of confidence in the business or the people you helped build it with. But portfolios are generally strengthened by diversification and balance, not company loyalty.

This first step is to simply acknowledge the risk tied to banking on one company’s future, even if it’s a company you helped build. Put differently, would you be comfortable with any other singular company representing the majority of your portfolio?

Before thinking about taxes, timing, or diversification strategies, it’s worth stepping back and answering that question honestly.

Step 2: Know the Constraints Before You Plan

Founders and executives are typically subject to a web of restrictions that limit when and how shares can be sold.

Lock-Up Periods

The most immediate barrier is the holding period. To prevent a mass exodus of insiders that could tank the stock price, most underwriters mandate a lock-up period (usually 180 days). During this time, your RSUs and restricted stock are effectively untouchable.

Rule 144

Even once the lock-up expires, you aren’t necessarily in the clear. As a key stakeholder, your trades are governed by Rule 144, requiring public filings and limiting the volume of shares you can sell in a specific three-month period.

Blackout Periods

As an executive, you are privy to “material non-public information.” This means you can only trade during narrow “window periods” — usually a few weeks after quarterly earnings are released.

If the market experiences extreme volatility or a significant liquidity event occurs while you are in a blackout, you’ll be forced to watch from the sidelines.

From a glass-half-full perspective, however, these “dead periods” during which you can map out a diversification strategy, coordinate tax planning, and align decisions with long-term goals.

Step 3: Define Your Baseline of Security

Wealth is often measured by the height of the ceiling — how high the stock price can go. But solidifying the floor and defining your baseline of security.

In other words, how much do you actually need

Start by calculating your immediate and future needs. This includes your current lifestyle, college savings for your children, any real estate ambitions, and a conservative estimate for retirement planning. Even rough estimates or back-of-the-napkin finances are acceptable for now, especially since goals (and life in general) tend to change.

Consider a founder who holds $20 million in company stock after a post-IPO lock-up. To find the floor, they might map out:

In this scenario, using the assumptions outlined above, their baseline of security .  Remember, this target must be achieved in after-tax dollars. The gross amount of stock required to fund it will depend on your tax profile and sale timing.

Once you have that figure, you can determine how much of your current concentrated stock position may warrantinto a diversified portfolio to help cover it. In our example, once the founder secures that first $9.1 million of after-tax proceeds, the remaining stock

Step 4: Explore Your Options for Reducing Concentration

With your floor established, the next question is how to convert your single stock position to a diversified portfolio while considering the potential tax implications.

There are many approaches, so whichever path you take, consider each facet of your finances: taxes, timing, risk tolerance, liquidity needs, and long-term goals.

Phased Sales

Many executives choose to reduce concentration gradually, trimming shares over a set period of time, instead of an all-at-once exit. This approach

Tools like 10b5-1 trading plans can support this process by automating sales during permitted windows, but the plan itself is not the strategy. The strategy is deciding how much needs to be diversified, over what time horizon, and in what sequence, with taxes, liquidity needs, and broader financial planning in mind.

Exchange Funds

In some cases, owners want to reduce concentration risk

Exchange funds are one possible solution. By contributing appreciated company stock into a pooled vehicle alongside other investors, you receive exposure to a diversified portfolio without selling your shares outright. The goal is to enable diversification without triggering an immediate tax bill. However, liquidity, lock-ups, and eligibility requirements need to be carefully evaluated.

Direct Indexing

Another option is to build around what you already own.

Direct indexing allows you to replicate a broad market index (like the S&P 500) by owning the individual holdings rather than a single fund. For someone with a large concentrated stock position, this strategy allows your investment advisor to:

• • Exclude your company and its specific sector from the rest of your portfolio to prevent overlapping exposure to the same market risk.
  • Selectively sell down positions within the index

Legacy Planning

To move future growth out of your taxable estate, a Grantor Retained Annuity Trust (GRAT) is often a tool discussed.

However, another option is a Spousal Lifetime Access Trust (SLAT). While a GRAT is designed purely for the next generation, a SLAT allows you to gift assets to a trust for your spouse’s benefit. The idea is to the assets (and their future growth) from your estate but keep the funds accessible to your spouse if your family ever needs them. It as an outright gift, but with a safety net through your spouse’s access.

Charitable Giving

If philanthropy is part of your estate planning, you may want to consider donating appreciated stock directly, instead of selling your shares and contributing cash. Instead, consider donating the appreciated stock directly to a donor-advised fund (DAF) or a charitable remainder trust (CRT).By doing so, you may:

• • the fair market value of the stock as long as the shares have been held for more than a year.
  • Diversify the assets within the trust or donor-advised fund to support your long-term legacy.

These strategies  may help manage concentration risk while considering tax implications alongside charitable goals.

Step 5: Recognize What’s in Your Control

No one — not founders, analysts, or investment committees — can predict future performance with any degree of precision. Instead, focus on what you can control.

Exposure: How much of your net worth is tied to a single company? What portion of your financial future depends on one earnings report, regulatory decision, or leadership change?

Tax efficiency: You may not control tax rates, but you may be able to when gains are realized, how they’re offset, and where assets are located across taxable and tax-advantaged accounts.

Liquidity: Optionality is important, today and down the road. It’s the ability to fund taxes, support family needs, pursue opportunities, or simply sleep better at night without being forced into untimely sales.

Long-term goals: What is this wealth meant to support? We believe decisions should be ultimately to clearly defined goals.

Step 6: Coordinate Your Professional Team

A post-IPO balance sheet is not exactly a DIY project. While you may already have a CPA and an estate attorney, a significant liquidity event can expose gaps in your advisory coverage.

Without coordination, an otherwise sound investment decision can create unintended tax consequences. Similarly, estate structures that are thoughtfully drafted from a legal perspective may not fully account for liquidity needs.

To navigate this complexity, an integrated team that functions with a “single-office” mentality.

The Wealth Manager as Quarterback

Effective asset management in this phase often benefits from a lead advisor who can synthesize advice from multiple disciplines. Their role is to

In this phase, the wealth manager often serves as the central hub, coordinating tax, estate, and investment decisions

Bridging the Gap Between Tax and Strategy

One of the after an IPO is “letting the tax dog wag the investment tail.” Many advisors focus so heavily on avoiding capital gains tax that they leave their clients overexposed to a single stock’s volatility.

A coordinated advisory team can support  a more balanced approach. For example, tax-loss harvesting within a direct indexing portfolio. By running proactive tax projections throughout the year, your team can pivot your strategy in real-time as the stock price fluctuates and your tax picture evolves.

Ongoing Review

Finally, we believe your team that a post-IPO plan is a living document. Market risk, changes in tax law, and evolving family goals mean that the strategy you set during the lock-up period may not be the one you need years later. Regular stress tests of your asset allocation and legacy structures can help assess whether your wealth continues to align with your evolving goals.

At Simon Quick, we work with founders and executives to design plans . If you’re navigating concentrated stock decisions after an IPO, we’re here to help you think it through.

This article is for educational purposes only and does not constitute legal, tax, investment, or financial advice. Individual circumstances vary, and readers should consult their own professional advisors before making decisions regarding business sales, investment, or financial planning. Certain examples, data, and perspectives referenced herein are drawn from third-party sources and are believed to be reliable; however, accuracy, completeness, and applicability to individual circumstances are not guaranteed. The S&P500 Index is an unmanaged index and cannot be invested in directly. Past performance is not indicative of future results.