Concentrated Public Equity: Hedging and Exit Strategies

The anatomy of a concentrated position problem

Concentrated public equity positions are among the most common and consequential challenges a family office will encounter. They arise in predictable ways: a founder who retained shares post-IPO, an executive accumulating restricted stock units over a 20-year tenure, or an inheritance of a single corporate holding that has compounded for generations. According to a 2023 survey by the National Center for Family Philanthropy and corroborating data from U.S. Federal Reserve Flow of Funds accounts, approximately 38% of ultra-high-net-worth families—those with assets exceeding $30 million—hold a single equity position representing more than 25% of their investable net worth. The financial logic for why this persists is straightforward: embedded capital gains on long-held positions routinely exceed 80-90% of the current market value, making outright sale a catastrophic tax event in isolation.

Consider a concrete example. A founding family holds 500,000 shares in a publicly traded company at a current price of $120 per share, representing $60 million in market value. Their cost basis is $2 per share. Federal long-term capital gains tax at 20%, the 3.8% Net Investment Income Tax, and a hypothetical state tax of 9.3% (California's top rate) produce a combined marginal rate of approximately 33.1%. Selling the entire position generates a tax liability of roughly $19.5 million—capital that leaves the family's balance sheet permanently. The problem is not merely the size of this number; it is that the alternative—retaining full concentration—exposes the family to catastrophic single-stock risk. Academic research, including work by Bessembinder (2018) published in the Journal of Financial Economics, demonstrates that over long periods, more than half of individual stocks underperform short-term U.S. Treasury bills on a lifetime basis. Concentration is a lottery ticket, not a free lunch.

The concentrated position problem is not a tax problem dressed up as an investment problem. It is a risk management problem that must be solved within a tax constraint—and the sequence of that framing matters enormously for the quality of the advice given.

Protective collars: deferring recognition while limiting downside

A protective collar combines the purchase of a put option with the sale of a call option on the same underlying shares. The put establishes a floor on losses; the call caps gains and generates premium income that partially or fully offsets the cost of the put. In practice, a zero-cost collar—where the call premium exactly offsets the put premium—is the most common implementation. For a stock trading at $120, a family might purchase a put at $102 (15% downside protection) and sell a call at $138 (15% upside cap), with the two premiums netting to near zero over a 12-month term.

The critical tax dimension concerns IRC §1259, the constructive sale rule enacted under the Taxpayer Relief Act of 1997. The IRS treats certain hedging arrangements as constructive sales of the appreciated financial position, triggering immediate recognition of the embedded gain. A collar is not automatically a constructive sale; the statute provides a safe harbour if the position is not 'substantially all' of the upside and downside risk that has been eliminated. The IRS has not issued a bright-line numerical threshold, but practitioner consensus, supported by private letter rulings, generally treats collars leaving at least 15-20% of upside participation as falling outside the constructive sale definition. This is why the 'at-the-money put, deeply out-of-the-money call' collar structure—which leaves significant upside—is preferred by tax counsel over the tighter bands that pure risk managers might favour.

Multi-year and forward collars

Collars can be structured over multiple years, with each annual tranche being reset, extending protection while continuing to defer the taxable event. Some families implement a 'laddered collar' across three to five years, with put strikes that step up incrementally to lock in gains as the stock appreciates. This approach preserves optionality: if the stock declines sharply in year two, the family can choose to sell the hedged position, recognising gains at then-current rates rather than at the rates prevailing when the position was first established. Given Congressional discussions around potential changes to long-term capital gains rates—the Biden administration's proposals reached as high as 39.6% at the federal level in 2021, though they were not enacted—the optionality to time recognition has material economic value.

From a practical implementation perspective, collars require that the shares not be subject to lock-up agreements or Rule 144 volume restrictions that would prevent delivery. For executives and directors holding restricted shares, Section 16 reporting obligations and company trading blackout policies must be cleared with legal counsel before execution. The collar itself does not require an actual sale, but brokerage documentation and ISDA master agreements must be in place, and the family office should maintain contemporaneous records demonstrating the non-constructive-sale intent of the structure.

Exchange funds: diversifying without a taxable event

Exchange funds—technically structured as partnerships under Subchapter K of the Internal Revenue Code—allow an investor to contribute appreciated shares and receive, in return, a proportionate interest in a diversified pool of securities contributed by other investors facing similar concentrated positions. No taxable exchange occurs at contribution; the investor's original cost basis carries over into the partnership interest. After the mandatory seven-year holding period required under Treasury Regulation §1.721-1, the investor can withdraw a diversified basket of securities, still carrying the original blended basis.

The economics are genuinely compelling. A family contributing $60 million in stock with a $1 million basis receives a partnership interest that, after seven years, represents a diversified portfolio of perhaps 40-60 holdings contributed by other participants. The embedded gain has not been extinguished—it will eventually be recognised when the withdrawn securities are sold—but the deferral value across seven years is substantial. At a 5% discount rate, deferring a $19.5 million tax liability for seven years has a present value benefit of approximately $4.8 million. More significantly, the idiosyncratic risk of the concentrated position has been eliminated entirely.

The 20% illiquid asset requirement and its implications

The seven-year lockup is the obvious constraint, but the more operationally complex requirement is that exchange funds must hold at least 20% of their assets in illiquid investments—typically real estate or private equity—under IRC §721(b) and associated regulations. This requirement exists to ensure the fund qualifies as a genuine investment partnership rather than a disguised sale. The practical effect is that participants receive a portfolio that is not purely public equity: approximately one-fifth of the fund's value will be in real estate limited partnership interests or similar illiquid structures. Families who need full liquidity within seven years, or who have strong objections to real estate exposure, should not use exchange funds as a primary solution.

Minimum contribution thresholds vary but are typically $5-10 million per participant, and the lead manager of the fund will conduct thorough due diligence on the contributed stock's liquidity and trading volume. Highly illiquid small-cap stocks are rarely accepted; the fund needs to be able to rebalance or liquidate positions if required. The fund structure also introduces counterparty risk: the investor is now exposed to the credit and operational quality of the fund manager, which is a material consideration that should be stress-tested during due diligence.

Prepaid variable forwards: monetising without selling

A prepaid variable forward (PVF) is a contract in which an investor agrees to deliver a variable number of shares to a counterparty (typically a bank) at a future date, in exchange for receiving a cash payment today—typically 75-90% of the stock's current market value. The 'variable' component means the exact number of shares delivered at maturity depends on where the stock price falls relative to a price band defined at inception. If the stock is above the upper collar strike at maturity, the investor delivers fewer shares (capturing some upside); if below the lower strike, more shares are delivered. If between the two strikes, the number of shares delivered adjusts proportionally.

The PVF is, in economic substance, very similar to a collar combined with a margin loan. The tax treatment, however, has been substantially clarified—and complicated—by Revenue Ruling 2003-7 and subsequent cases. The IRS position, affirmed in cases including Anschutz Co. v. Commissioner (10th Circuit, 2012), is that a PVF does not constitute a constructive sale in the year the cash is received, provided certain conditions are met: the shares must not be pledged to the specific counterparty in a manner that eliminates the investor's economic risk, and the forward must retain genuine price risk on the underlying. Critically, the IRS has prevailed in several cases where investors attempted to use PVFs while simultaneously hedging out the residual exposure through other instruments—a 'super-hedge' that the agency characterised as a constructive sale.

Dividend equivalent payments and withholding complexity

For non-U.S. families holding positions in U.S. public companies, PVFs introduce an additional layer of complexity under IRC §871(m), which treats certain 'dividend equivalent payments' made under equity derivatives as U.S.-source dividends subject to 30% withholding tax (reduced by applicable treaty rates). Regulations finalized in 2017 and phased in through 2023 now require detailed delta calculations to determine whether a PVF has sufficient correlation to the underlying to trigger §871(m) treatment. This is not a reason to avoid PVFs for non-U.S. families, but it is a reason to ensure that U.S. tax counsel with international expertise is involved in the structuring—and to model the after-withholding economics carefully against alternative strategies.

From a risk management perspective, PVFs are powerful tools for families who need liquidity—for estate planning, a new investment commitment, or living expenses—but are unwilling to trigger a taxable sale. The cash received at inception can be reinvested in a diversified portfolio, effectively achieving diversification on the reinvested proceeds while the original shares remain legally owned (and their gain deferred) until the forward matures. The maturity date is typically three to seven years, at which point the investor must either deliver shares (triggering the gain) or roll the forward into a new contract, subject to the counterparty's willingness and prevailing market conditions.

Charitable strategies: permanent elimination of gain

For families with genuine philanthropic objectives, charitable vehicles offer the only mechanism for permanently eliminating—rather than merely deferring—embedded capital gains. Three structures are most relevant to concentrated public equity: direct charitable gifts, charitable remainder trusts (CRTs), and donor-advised funds (DAFs).

Direct gifts and donor-advised funds

The most straightforward approach is contributing appreciated shares directly to a public charity or DAF. The donor receives an income tax deduction equal to the fair market value of the shares on the date of contribution (subject to the 30% of adjusted gross income limitation for contributions of capital gain property to public charities, with a five-year carryforward), and no capital gains tax is ever recognised on the embedded gain. The charity or DAF then sells the shares and deploys the proceeds. This is economically equivalent to selling the shares, paying zero capital gains tax, and donating the gross proceeds—a significantly better outcome than selling first and donating after-tax proceeds.

DAFs add flexibility: the family retains advisory privileges over grant-making, contributions can be made in large tranches in high-income years to maximise the deduction, and grants to ultimate charitable beneficiaries can be distributed over many years. The aggregation of contributions across multiple tax years, combined with the five-year carryforward, allows systematic reduction of the concentrated position without creating charitable deduction waste in any single year. One important structural note: DAF contributions are irrevocable. Families who are uncertain about the scale of their philanthropic commitment, or who may need the capital back, should not use a DAF as a tax planning mechanism alone.

Charitable remainder trusts: income, deferral, and philanthropy combined

A charitable remainder trust (CRT) is an irrevocable split-interest trust that converts concentrated, low-basis stock into a diversified income stream while deferring—and ultimately eliminating—capital gains. The mechanics are as follows: the family contributes appreciated shares to the CRT; the trustee sells the shares within the trust (no capital gain recognised at the trust level); the proceeds are reinvested in a diversified portfolio; and the trust distributes an annuity (CRAT) or unitrust (CRUT) payment to the income beneficiaries—typically the family—for a defined term or for life. At the termination of the trust, the remaining assets pass to a designated charity.

The income tax deduction at contribution is based on the present value of the remainder interest that will eventually pass to charity, calculated using the IRS Section 7520 rate (which, at 5.2% as of mid-2024, is meaningfully higher than the near-zero rates that prevailed from 2009-2021). The deduction is typically 20-40% of the contributed value depending on the payout rate selected and the beneficiary's age. The payout rate must fall between 5% and 50% of the initial trust value (for CRATs) or net asset value (for CRUTs), and the actuarial present value of the charitable remainder must be at least 10% of the initial contribution value.

The capital gains tax is not permanently eliminated through a CRT—it is spread across the income distributions to beneficiaries under the four-tier income ordering rules, which allocate ordinary income first, then capital gains, then tax-exempt income, then return of principal. In the early years of a CRT that sold a large block of appreciated stock, a significant portion of the annual distribution will be characterised as long-term capital gain. This is still advantageous: the gain is spread over many years and taxed only as cash is received, rather than in a single year at full recognition.

The CRT is not a tax elimination device for capital gains—it is a spreading and deferral mechanism that doubles as a diversification tool and a charitable planning vehicle. Families who understand it as all three simultaneously will use it far more effectively than those who frame it purely as tax planning.

Qualified opportunity zones: an alternative deferral path

Under IRC §1400Z-2, taxpayers who realise capital gains and invest the proceeds into a qualified opportunity fund (QOF) within 180 days can defer recognition of those gains until December 31, 2026 (the current statutory deferral deadline, though legislative extensions have been proposed). If the QOF investment is held for at least ten years, any appreciation on the QOF investment itself is permanently excluded from taxable income.

This creates a two-part benefit for families willing to accept illiquidity: first, deferral of the gain on the sold concentrated position until 2026; second, permanent exclusion of any investment gains on the QOF itself over the subsequent decade. The strategy requires an actual sale of the concentrated position—unlike collars or PVFs, there is no deferral without recognition—but the recognition is deferred and the reinvestment gain permanently excluded. For a family holding a $60 million position with $59 million of embedded gain, the economics of a QOF investment depend heavily on the quality and expected return of available opportunity zone projects, which are geographically constrained to designated census tracts and have historically been concentrated in real estate development.

The 2026 recognition deadline is a meaningful constraint. At that point, the originally deferred gain will be recognised regardless of whether the QOF investment has been sold—the amount recognised is the lesser of the original deferred gain or the current fair market value of the QOF interest. Families who pursue this strategy must maintain liquidity or borrowing capacity to meet the tax liability in 2026 from sources other than the QOF investment itself, which may be illiquid at that time. This liquidity planning is frequently underestimated in initial analysis.

Cross-border complexity and the closing of international arbitrage

Families with international structures—trusts in the Cayman Islands, foundations in Liechtenstein, holding companies in Luxembourg or Singapore—sometimes attempt to use cross-border arrangements to achieve more favourable tax treatment on concentrated position disposals. This landscape has changed materially over the past decade, and advisors who present offshore structures as viable arbitrage tools without addressing the current regulatory environment are doing their clients a disservice.

The Common Reporting Standard (CRS), now adopted by over 100 jurisdictions and administered under OECD frameworks, requires automatic exchange of financial account information between tax authorities. A U.S. person with an interest in a Cayman trust holding a U.S. concentrated position will have that account reported to the IRS under both CRS (for non-U.S. account information flowing in) and FATCA. The U.S. also imposes mark-to-market taxation on U.S. persons who are treated as owners of controlled foreign corporations under Subpart F and GILTI rules (IRC §951 and §951A respectively), and the PFIC rules (IRC §1291-1298) impose punitive tax treatment on passive foreign investment companies.

BEPS Pillar Two, with its global minimum effective tax rate of 15% applying to multinational enterprise groups with revenue exceeding €750 million, is less directly relevant to family office holding structures, but the broader BEPS framework—particularly Action 6 (treaty shopping) and Action 7 (permanent establishment)—has eroded the effectiveness of treaty-based structures designed to reduce withholding taxes on U.S. equity income for non-U.S. families. Advisors working with non-U.S. families holding U.S. concentrated positions should focus on legitimate treaty planning, proper substance requirements in holding jurisdictions, and FATCA compliance rather than any structure premised on information asymmetry between tax authorities.

Constructing an integrated strategy: a framework for family offices

No single instrument described above is universally optimal. The appropriate strategy depends on a matrix of family-specific variables: the magnitude of embedded gain relative to current market value; the family's marginal federal and state tax rate; the expected holding period tolerance; near-term liquidity requirements; philanthropic capacity and intent; the family's risk appetite for continued equity price exposure; and any legal restrictions on the shares themselves (lock-up agreements, SEC Rule 144 restrictions, insider trading policies, estate planning constraints).

A practical analytical framework proceeds in four stages. First, quantify the 'do nothing' risk: model the probability distribution of outcomes if the concentrated position is retained over a 5-, 10-, and 20-year horizon, incorporating realistic assumptions about single-stock volatility (historical volatility for large-cap U.S. equities averages 25-35% annually), dividend yield, and the opportunity cost of foregone diversification. Research by William Bernstein and others suggests that the diversification benefit—measured as the reduction in annualised volatility for a typical portfolio—reaches approximately 90% of its theoretical maximum at 30-40 holdings. A single stock captures essentially none of this benefit.

Second, segment the position by tax lot. Large concentrated positions frequently consist of shares acquired at different times and at materially different cost bases. Shares acquired five years ago at $80 carry a much smaller embedded gain than shares acquired at $2 twenty years ago. Different lots may be eligible for different strategies: the high-basis lots might be sold outright in a year when other capital losses are available to offset gains; the low-basis lots are the natural candidates for exchange funds, CRTs, or PVF structures. This segmentation analysis alone—which requires detailed records that many families have not maintained—often reveals more flexibility than initially apparent.

Third, model the after-tax, after-fee economics of each available strategy across a range of stock price scenarios. The collar strategy performs best if the stock declines (the put is valuable) or stays flat (the put cost is offset by the call premium received, and no gain is recognised). The PVF performs best when the family needs immediate liquidity and the stock performs modestly. The CRT performs best when the family has philanthropic objectives and a long time horizon. The exchange fund performs best when the family has neither liquidity needs in the next seven years nor philanthropic objectives, and simply wants risk reduction. These profiles rarely conflict directly; rather, they suggest different allocations of the total position to different strategies.

Fourth, establish a governance protocol for ongoing management. Concentrated position strategies are not one-time decisions. Collars expire and must be renewed or unwound. PVFs mature and require a delivery or roll decision. CRT distributions must be reinvested appropriately. Exchange fund lockup periods end and withdrawal decisions must be made. The family office should assign a named responsible party for each instrument, maintain a decision calendar with 90- and 180-day review horizons before each significant event, and document the rationale for each renewal or adjustment decision contemporaneously. In the event of an IRS audit—and concentrated position strategies attract elevated audit scrutiny—this contemporaneous documentation is often the difference between a successful defence and a sustained adjustment.

The families who navigate concentrated positions most successfully are those who accept that the optimal outcome is rarely the minimum-tax outcome. They make deliberate trade-offs between tax deferral, risk reduction, liquidity, and philanthropic impact—and they document those trade-offs with the same rigour they would apply to a new investment commitment.

Estate planning integration: basis step-up as the long-horizon variable

Any analysis of concentrated position management that ignores the estate tax dimension is incomplete. Under IRC §1014, assets included in a decedent's taxable estate receive a step-up in cost basis to fair market value at the date of death. For a share with a $2 cost basis and a $120 current market value, the entire $118 per share of embedded gain is permanently eliminated upon the death of the taxpayer—never taxed, not even deferred. This creates a powerful incentive for families with significant estate tax exposure to retain concentrated positions until death rather than trigger capital gains during lifetime.

The calculus is not straightforward. The step-up eliminates capital gains tax but does not eliminate estate tax, which currently applies at 40% to taxable estates above the $13.61 million exemption (2024 figures), an exemption scheduled to revert to approximately $7 million (inflation-adjusted) after December 31, 2025, absent Congressional action. A family holding a $60 million concentrated position who dies before implementing any strategy has avoided $19.5 million in capital gains tax but may owe $18-20 million in estate tax on the same asset. The comparison is not capital gains tax versus nothing; it is capital gains tax versus estate tax, and the relevant question is which tax applies to a larger effective base.

Grantor retained annuity trusts (GRATs) and spousal lifetime access trusts (SLATs) can shift concentrated positions out of the estate while the step-up is no longer available (since the asset leaves the taxable estate), but the capital gains tax on future sales within the trust is preserved—there is no step-up for assets that have been gifted. The 2025 exemption cliff makes this interaction particularly acute in current planning. Families where the senior generation is in their late 70s or older should model the after-tax, after-estate-tax outcome of retaining versus hedging versus gifting the concentrated position with explicit mortality probability assumptions, an analysis that requires close coordination between the family office, estate planning counsel, and actuarial inputs.

Practical recommendations for the family office

Several operational principles follow from this analysis. First, the family office should maintain a real-time tax lot register for all concentrated positions, updated with each grant, vesting event, or open-market purchase. The absence of accurate basis records is a remarkably common deficiency that limits strategic flexibility. Second, the legal review of any collar, PVF, or exchange fund participation should be conducted by counsel with specific experience in the relevant IRC sections—not generalised tax counsel—and should include a written opinion on the constructive sale analysis and any applicable securities law constraints.

Third, for families with both philanthropic intent and concentrated positions, the decision to use a CRT or DAF should be made in coordination with the estate plan, not in isolation. The charitable deduction may be most valuable in the year of highest income—often the year of a liquidity event or significant bonus—and timing the contribution accordingly can effectively increase the after-tax value of the charitable strategy by 5-10 percentage points. Fourth, the family office investment committee should maintain a written policy statement on concentrated equity risk thresholds: at what percentage of net worth does a single position trigger a mandatory review? A threshold of 20-25% is common among institutionally managed family offices, and formalising this threshold removes the psychological inertia that often prevents timely action on legacy positions.

Finally, none of these strategies benefit from delay. Collars become more expensive as implied volatility rises (often coinciding with market stress, precisely when protection is most needed). Exchange funds may not be accepting new contributions when the family is ready to act. PVF terms deteriorate when credit conditions tighten. The time to design and implement a concentrated position strategy is when markets are calm and the family's financial circumstances are stable—not in reaction to a price decline that has already eroded the position's value and narrowed the available options.