Diversifying Concentrated Executive Stock

Most public-company executives accumulate $5-50M of employer stock over time through RSU vesting, option exercises, ESPP purchases, and founder equity. At that level, concentration is the single largest portfolio risk. Five strategies are commonly used in combination.

Strategy 1: Gradual 10b5-1 sell-down

Most common starting point. Pre-arranged monthly or quarterly sales via a 10b5-1 plan, typically 2-5% of position per month. Over 18-24 months, gets a meaningful portion diversified.

• Pros: simple, compliant, works at any size.
• Cons: slow for very large positions, tax on gains.
• Best for: positions under $10M, when tax drag is acceptable.

Strategy 2: Exchange funds

Contribute concentrated shares to a fund pooled with other concentrated-stock holders. Receive partnership units representing a diversified basket. No immediate tax at contribution (structure: IRC Section 721).

• Pros: instant diversification with zero tax. Preserves basis for estate step-up. Large exchange fund managers include Eaton Vance, Goldman Sachs, Aperio, Morgan Stanley.
• Cons: 7-year lockup. 1-1.5% annual fees. Typically $1M+ minimums. Less liquid than individual stocks.
• Best for: positions $3M+ where immediate diversification outweighs liquidity loss.

Strategy 3: Direct indexing with tax-loss harvesting

Separately-managed account (SMA) holding individual stocks that mimic an index (S&P 500, Russell 3000). Tax losses on underperforming holdings are harvested to offset gains from selling concentrated stock.

• Pros: tax-efficient, stays invested, works at $500K+ size.
• Cons: 0.25-0.40% fees. Harvesting diminishes over time as the SMA matures. Requires coordination with concentrated-stock sales.
• Best for: ongoing multi-year diversification with predictable tax brackets.

Providers: Parametric, Aperio (BlackRock), Wealthfront, Frec, Optimal Asset.

Strategy 4: Charitable remainder unitrust (CRUT)

Contribute shares to a CRUT. Receive a lifetime annuity (typically 5-7% of trust value) + current-year charitable deduction + capital gains deferral. Remainder goes to charity at death.

• Pros: zero capital gains tax at contribution. Diversifies the trust corpus. Provides lifetime income.
• Cons: irrevocable. Charitable intent required. Legal/admin setup cost.
• Best for: executives with genuine charitable intent + large concentrated positions + desire for income continuity.

Strategy 5: Collar / protective options

Write covered calls above current price, use premium to buy protective puts below. Creates a price band — protects downside, caps upside — without selling the underlying.

• Pros: defers sale and tax. Provides downside protection.
• Cons: caps upside. Requires options expertise. IRS "constructive sale" rules can treat aggressive collars as triggering gain anyway.
• Best for: short-term (12-24 month) price protection before a known event (post-lockup, tax-year crossing).

Selecting the right mix

Most executives with $10M+ concentrated positions use combinations:

• 40% via 10b5-1 gradual sell-down over 2-3 years (tax-efficient, liquid)
• 30% contributed to exchange fund (immediate diversification)
• 20% via CRUT if charitably inclined
• 10% held or hedged via collar for timing optionality

Coordination considerations

• State residency. Selling right before moving to a no-income-tax state (Texas, Florida, Washington, Nevada) can save 5-13% state tax.
• Year-to-year tax bracket. Spread sales across years to avoid stacking in peak-bracket years.
• AMT from ISO exercises. Coordinate concentrated-stock sales with ISO exercise timing.
• Retirement timing. Post-retirement low-bracket years are ideal for large sales.