Prospect Theory in a Tender-Offer Decision: Framing the Sale

A private-company tender offer presents each employee with a choice: sell some or all of your vested shares at the tender price, or hold. The price is typically set 10-25% below the implied 409A or the most recent preferred-round valuation to reflect common-stock discount and to create demand from the buyer. The offer is open for a fixed window, usually 20-30 business days, and employees who sell receive cash shortly after close.

Prospect theory predicts that the framing of the offer influences employee decisions far more than the objective price. A tender framed as “take 60% of your position off the table” produces different response rates from the same price framed as “sell at a 22% discount to 409A” even though the economic choice is identical.

This article walks through the specific framing effects in tender decisions, the math that should drive the decision, and what employees should actually do when a tender hits their inbox.

The Core Prospect Theory Finding

Prospect theory, developed by Kahneman and Tversky in 1979 and refined in 1992, has four relevant implications for tender decisions:

1. Value function is concave for gains. Each additional dollar of gain feels less valuable than the one before. Selling 50% of the position feels almost as good as selling 100%.

2. Value function is convex for losses. Each additional dollar of loss feels less painful. Losing another $100K on a $500K loss barely registers versus the first $100K.

3. Reference-point dependent. The “gain or loss” frame depends on what the employee mentally holds as the reference. For tender decisions, the reference is often the most recent 409A valuation.

4. Probability weighting. Small probabilities of large gains are overweighted (lottery effect). Near-certain outcomes are underweighted.

In a tender: the employee compares the tender price to the 409A or preferred price. If the tender is lower, the frame is “loss” (selling at a discount). Convex loss curve means holding is psychologically preferred. If the tender is close to or above 409A, the frame is “gain” and concave curve means partial-selling is preferred.

The same tender price produces different response rates depending on how it compares to the employee’s reference point. The 409A is the typical reference, but employees also reference the “paper gain” from the grant price, the preferred-round price, and sometimes informal valuations from conversations about potential IPO pricing.

Tender Pricing Mechanics in 2025

Typical structures:

• Price: 75-90% of current 409A, or 60-80% of most recent preferred round. Buyer is typically a secondary fund, late-stage growth fund, or the company itself.

• Cap: Some tenders cap the number of shares any employee can sell (often 20-50% of vested holdings). The cap forces employees to keep some exposure and prevents the tender from draining key employees’ stakes.

• Preferred treatment for early employees: Some tenders carve out higher caps or higher prices for founders and first 20 employees.

• Board approval and right of first refusal: The board must approve, and existing investors often have ROFR rights that can interfere with the close.

• Tax mechanics: Tender proceeds for sale of stock are capital gain or loss (§1001). If stock was acquired via ISO exercise and held the §422 holding periods, qualified disposition treatment applies. If stock was acquired via NSO exercise, the exercise-date ordinary income is already taxed and the tender is pure capital gain.

The Objective Math: Should You Sell?

The objective framework: compare the risk-adjusted forward value of holding to the cash available from selling.

Inputs:

• Tender price: what you get if you sell.
• Expected value at IPO or next liquidity event: typically the most recent preferred price or a higher number if the company is growing into it.
• Probability-weighted range of outcomes: company might IPO at 2x current valuation, might stay flat, might down-round, might not IPO at all.
• Time to liquidity: 3-6 years typical for a late-stage private company, though IPO cadence has been slower in 2023-2025.
• Discount rate: your personal cost of capital on the locked-up equity, typically 10-15% for unsystematic tech-equity risk.

For a typical late-stage private company:

• Tender price: $20/share
• Current 409A: $24/share
• Last preferred: $28/share
• Estimated IPO in 4 years at $40/share (50% probability), $25/share (30%), $15/share (15%), no IPO (5%)
• Expected value at year 4: 0.50 x $40 + 0.30 x $25 + 0.15 x $15 + 0.05 x $0 = $29.75
• PV at 12% discount rate: $29.75 / 1.12^4 = $18.91
• Tender price $20 > PV $18.91: sell (barely)

The math depends heavily on the assumed probability distribution. Employees often assume a wildly optimistic distribution (70%+ probability of IPO at 2x or higher) that doesn’t hold up in historical base rates.

Historical base rates for Series D+ companies from 2015-2024:

• IPO within 4 years: roughly 15-25% in strong IPO markets, 8-15% in weak markets.
• Acquisition: 20-30%.
• Flat or down-round: 30-40%.
• Wind-down: 15-25%.

An employee applying these base rates instead of optimistic forecasts sees a lower expected value and a stronger case for tendering.

The Partial-Tender Framing

Most employees respond to tenders by selling a fraction. The prospect-theory explanation: selling some captures gains on the concave portion of the value function without “taking the full loss” of selling everything. Selling 30% feels like “getting some cash” without “giving up the upside.”

This partial-response is rational in the sense that it reduces concentration while preserving optionality. The specific fraction should reflect the employee’s diversification needs and the risk-adjusted value calculation, not the psychological comfort of “half-selling.”

A structured approach to tender sizing:

1. Compute the target percentage of net worth in the concentrated position based on personal risk tolerance. Typically 10-20% for aggressive, 5-10% for moderate, 0-5% for conservative.

2. Determine the gap between current concentration and target. If current is 45% and target is 15%, the gap is 30 percentage points of net worth to shed.

3. Translate to shares to tender. If the tender caps sales at 40% of holdings, you may not be able to fully close the gap in this tender. Sell the cap amount.

4. Plan for future tenders. If this tender is one of several expected, partial selling now preserves shares for future tenders at potentially higher prices.

The framework produces sizing based on concentration targets, not based on how the tender feels.

Rule 14e-1 and Tender Mechanics

SEC Rule 14e-1 requires tender offers to remain open for at least 20 business days and imposes disclosure requirements. For private-company employee tenders, the rule’s technical application depends on whether the tender qualifies as a “tender offer” under SEC Rule 14d-2(a)‘s multi-factor test.

Most private-company employee tenders are structured to avoid formal 14e-1 application by limiting the number of offerees to under 35 (under the Section 4(a)(2) private-placement exemption) or by other structuring. The practical effect: the 20-day window is typical but not legally required in all cases.

A shorter window (7-10 days) puts more time pressure on employees and increases the chance that emotional framing dominates rational analysis. Employees with short windows should still do the math, but accept that they may not get professional advice in time.

The Wash-Sale Angle

If the tender is for stock that will be bought back through a new issuance or repurchase, the wash-sale rule under §1091 may apply to losses on the tendered shares. This is rare in employee tenders (the company is not typically buying back from employees who also hold other shares in a way that triggers wash-sale) but bears checking.

For ISO holders tendering within one year of exercise, the tender disqualifies ISO treatment and triggers ordinary income on the spread at exercise under §422(a)(1). Plan accordingly. An employee who exercised 5,000 ISOs six months ago and tenders them in the current offer turns a potential qualifying disposition into a disqualifying disposition with $150K of ordinary income reclassified from capital gain.

Frequently Asked

Should I tender the maximum allowed or a smaller amount? Depends on concentration. If you are over-concentrated and the tender cap lets you shed risk, tender the max. If you are appropriately diversified already, tender less.

What tax rate applies to the tender proceeds? Capital gain rates apply. Long-term (23.8% federal for high earners) if the shares have been held more than one year from vest or exercise. Short-term (ordinary rates, up to 37% federal) if held less than one year.

Does the company see which employees tendered? Usually yes, though specific identities are often filtered by the secondary-market facilitator. The company sees aggregate numbers and can usually infer.

Is there any reason to not tender if I’m over-concentrated? Tax-timing (waiting for a low-income year), QSBS §1202 holding (if close to the 5-year threshold), or a strong thesis on near-term upside. Absent these, tendering reduces risk.

If I tender 50% now and the company IPOs at 2x in two years, should I feel bad? No. The 50% you kept appreciated. The 50% you tendered was converted to diversified wealth. Both grew. Partial-selling always has this “regret optionality” framing; it should not drive the decision ex ante.