Pre-IPO Tender Offer: Tax Treatment Plus Lock-Up Plus RSU vs Option Differences

What a pre-IPO tender offer actually is

A tender offer in private-company equity is a structured liquidity event where an outside investor (or in some cases the company itself) offers to buy a portion of existing shareholders’ shares at a fixed price. The structure differs from a secondary-market individual sale (Forge, EquityZen, Equity Bee) in three ways:

• Company-sponsored. The company organizes the tender, sets the terms, and approves participation. Without company approval, the existing shareholder agreements typically block individual sales via right-of-first-refusal or transfer restrictions.
• Universal terms. All eligible holders see the same price, the same percentage cap on participation, and the same documentation. Individual secondary-market sales involve bespoke pricing and intermediaries.
• Tax-event clarity. Tender offers settle on a defined date with structured tax reporting. Individual secondary sales sometimes leave the seller responsible for tracking and reporting the disposition without broker support.

Late-stage private companies (Stripe, SpaceX, Databricks, Discord, Anthropic) have run tender offers for years to provide pre-IPO liquidity to employees and early investors. The pattern tends to repeat: a tender approximately 9-18 months before an expected IPO, with a price 10-25% below the most recent primary-round valuation, capped at 15-25% of each holder’s vested position.

The three equity instruments behave differently

The tax treatment of tender proceeds depends entirely on what equity instrument you hold. The same $1 million of tender cash produces three radically different federal tax bills depending on whether the underlying is RSUs settling at tender, ISOs in their disqualifying window, or NSOs already exercised.

RSUs — IRC sec. 451 constructive receipt at settlement

Private-company RSUs are typically double-trigger: they require both a service-based vesting condition (typically 4 years with 1-year cliff) AND a liquidity-event condition (IPO or qualifying acquisition). The liquidity-event condition exists because settlement creates W-2 ordinary income that would force the employee to come up with cash for withholding before any market exists to sell the shares.

A tender offer of sufficient size and structure can satisfy the liquidity-event condition under the RSU agreement’s terms. When it does, IRC sec. 451 doctrine of constructive receipt treats the full vested amount as ordinary income at the FMV on the tender date — even if the employee elects not to tender any shares.

This is the trap most pre-IPO employees miss: a tender offer can force RSU settlement on the entire vested portion regardless of how many shares the employee personally tenders. If $200,000 of RSUs are vested and the tender qualifies as a liquidity event, the employee owes ordinary income tax on $200,000 at marginal rates — even if they tender only 10% of the position. The company typically funds the tax withholding by allowing the employee to tender enough shares to cover the bill, but the income event is unavoidable once the liquidity condition is met.

ISOs — IRC sec. 422 disqualifying disposition

Incentive stock options under IRC sec. 422 require two holding periods to achieve qualifying-disposition treatment: more than 2 years from the grant date AND more than 1 year from the exercise date. A sale before either threshold is a disqualifying disposition that converts the original exercise spread from an AMT preference item into ordinary W-2 income for the year of sale.

The standard pre-IPO employee timeline produces predictable disqualifying-disposition pressure:

• Grant year 1: ISOs granted at low strike (say $2)
• Grant year 2-3: First exercises at low FMV ($10-$15) to start the holding clocks
• Year 4-5: Pre-IPO tender offer at $40-$60 FMV
• Year 5-6: IPO and lock-up release

If the tender occurs in year 4 and the ISOs were exercised in year 2-3, the 2-year-from-grant test is satisfied but the 1-year-from-exercise test may or may not be (depending on exact dates). Some employees thread the needle; many do not. The cost of failing the test on a $40 tender of $2-strike ISOs originally exercised at $15 FMV: the $13 exercise spread ($15 minus $2) becomes ordinary income at up to 37% federal.

NSOs — capital gain or loss on exercise basis

Non-qualified stock options are taxed on exercise: the spread between strike and FMV at exercise becomes ordinary income (W-2 reportable), and the employee’s tax basis in the resulting shares equals the FMV at exercise. Subsequent sale of those shares (including via tender) produces capital gain or loss on the difference between sale price and exercise-date FMV.

For NSO shares held more than 12 months from exercise, tender proceeds are long-term capital gain at 20% federal plus 3.8% NIIT (and applicable state). For NSO shares exercised within the past 12 months, tender proceeds are short-term capital gain at ordinary rates.

The NSO holding-period analysis is simpler than ISO because there is no second clock (grant date is irrelevant for NSO once exercised). The only question is whether you have held the shares more than 12 months since exercise.

Worked example: $1.2 million tender across a mixed equity stack

Aanya is a senior engineering manager at a pre-IPO data-infrastructure company that just announced a tender offer at $40/share. She holds:

• 30,000 ISO shares exercised 18 months ago at $2 strike, $15 exercise-date FMV (paid $15,000 AMT at exercise)
• $200,000 of vested RSUs (5,000 shares at $40 FMV) that will settle when the tender qualifies as a liquidity event
• 8,000 NSO shares exercised 14 months ago at $5 strike, $20 exercise-date FMV ($120,000 of ordinary income already on W-2 from exercise)
• 4,000 NSO shares exercised 6 months ago at $5 strike, $30 exercise-date FMV ($100,000 of ordinary income already on W-2 from exercise)

The tender allows participation up to 20% of vested equity. Aanya’s total vested equity at $40/share: 30,000 + 5,000 + 8,000 + 4,000 = 47,000 shares worth $1.88 million. Her tender cap: 9,400 shares ($376,000).

Her income: $360,000/year base, $200,000 RSU constructive-receipt income at tender, total household MFJ income approximately $700,000 for the year. Marginal federal rate: 35%. State (Washington): no state income tax. NIIT: 3.8% on investment income above $250,000 MAGI.

Tax treatment by lot

On top of the tender-driven tax events, Aanya must also recognize the $200,000 of RSU settlement income because the tender qualifies as the liquidity event under her RSU agreement — regardless of how many RSU shares she tenders. That $200,000 is W-2 ordinary income at her 35% marginal rate plus 1.45% Medicare = $72,700 federal.

Selecting lots — the optimization

Aanya could optimize her tender lot selection to minimize ordinary income:

• Tender the long-held NSO lot first. Pure LTCG. Federal: 20% + 3.8% NIIT = 23.8% on the gain.
• Tender the RSU shares next. Settlement at tender price means zero capital gain on the sale itself; the $200,000 ordinary-income event is independent of the tender choice.
• Tender the 6-month NSO last (or not at all). Short-term capital gain at 35% — worse than waiting 6 more months for LTCG.
• Avoid tendering ISO shares. Each ISO tendered triggers ordinary-income recapture of the exercise spread. Waiting 6 more months satisfies the 1-year-from-exercise test on the ISO appreciation only — the 2-year-from-grant test still must be checked separately.

If Aanya restructures to tender 4,000 long-NSO + 2,400 RSU + 3,000 short-NSO = 9,400 shares, she avoids all ISO disqualifying dispositions and minimizes the ordinary-income hit on the tender itself. The trade-off: leaving ISO shares in the position prolongs her concentration risk through the lock-up period.

The lock-up — what happens to the remaining 80%

Pre-IPO tender offers do NOT release the unsold portion from post-IPO restrictions. After the company goes public, all existing shareholders (including Aanya) are subject to the IPO lock-up provisions in the underwriting agreement. Standard structure:

• Duration: 180 days from IPO pricing date, occasionally extended to 270 days for executives or specific holder classes.
• Coverage: all shares held by employees, officers, directors, pre-IPO investors, and major holders. Restricted from sale, pledge, hedge, or transfer.
• Early-release triggers: some lock-ups release a portion (often 25%-50%) if the stock trades above a price threshold (1.5x-2x IPO price) for a sustained period (typically 10 trading days within a 15-day window).
• Affiliate carve-outs: certain transactions are permitted during the lock-up (charitable gifts to certain DAFs, transfers to family trusts, exercises of expiring options) but cannot result in sales.
• Post-IPO secondary releases: 90-day or 180-day partial releases sometimes negotiated for specific holder classes.

For an employee holding $1.5 million of post-tender shares through the lock-up, the upside is capturing potentially higher post-IPO prices. The downside is unbounded — the stock can fall 50% during the lock-up, and the employee cannot hedge (most underwriting agreements prohibit hedging the locked-up position).

This is the strategic core of the tender-participation decision: trade certain liquidity at the tender discount for uncertain (and unhedgeable) liquidity at post-lock-up prices. If your concentration risk is high, the tender discount is a fair price for risk reduction. If your concentration is moderate and the company has strong IPO fundamentals, holding through the lock-up usually maximizes expected value.

SEC Rule 144 — the second clock on post-lock-up sales

After the lock-up expires, SEC Rule 144 still controls the resale of restricted securities. Restricted securities (defined in Rule 144(a)(3)) include shares acquired in private placements and most employee-equity transactions, even if technically registered on Form S-8 at IPO.

• 6-month holding period from the later of (a) acquisition or (b) full payment of the purchase price. Most ISO and NSO exercises satisfy this well before any IPO.
• Volume limitations for affiliates: in any 3-month period, the greater of 1% of outstanding shares or the average weekly trading volume during the preceding 4 weeks.
• Public information requirement: for affiliates and non-affiliates holding less than 1 year, the issuer must be current in its periodic SEC filings.
• Manner-of-sale requirements: for affiliates, sales must be through unsolicited broker transactions or directly with a market maker.
• Form 144 filing: affiliates must file Form 144 with the SEC for sales exceeding 5,000 shares or $50,000 in a 3-month period.

Most rank-and-file employees become non-affiliates upon termination and lose affiliate status six months later. Officers, directors, and 10% shareholders remain affiliates indefinitely while in office. Affiliate status persists for 3 months after departure under Rule 144.

AMT credit recovery — the silver lining on ISO disqualifying dispositions

If you previously exercised ISOs and paid AMT on the spread, a subsequent disqualifying disposition (forced or voluntary) creates an AMT credit recovery opportunity. Under IRC sec. 53, AMT paid in prior years generates a Minimum Tax Credit that can offset regular tax in years when regular tax exceeds tentative minimum tax.

When the ISO becomes a disqualifying disposition, the regular tax treatment changes: the exercise spread is now ordinary income for regular tax (not just AMT). The taxpayer’s tax basis for AMT purposes was already increased at exercise (the AMT preference adjustment increased AMT basis), but regular-tax basis was only increased to the exercise price. The disqualifying disposition forces these two bases to reconcile, which often triggers a large MTC release in the disposition year.

For Aanya, if she paid $15,000 of AMT at the original ISO exercise, her MTC carryforward can recover much of that as a credit against the disqualifying-disposition ordinary tax — usually netting back to roughly the same effective tax outcome as if AMT had never been paid. The recovery is rarely perfect (AMT rates differ from regular rates, and the credit is limited annually), but it materially softens the tax hit of forced disqualifying dispositions on previously AMT’d ISO exercises.

The participation decision framework

Use this four-step test before committing to a tender amount:

1. Quantify concentration. What percentage of net worth is in employer equity? Include vested RSU shares (treated as cash-equivalent post-tender-settlement) plus all option positions at intrinsic value. If above 30%, lean toward maximum tender participation.
2. Estimate the tender-to-IPO gap. If the tender is at $40 and reasonable IPO pricing is $55-$70, the gap is 25-40%. Compare to the lock-up risk: a 30% stock decline during the lock-up wipes out the gap entirely. High-volatility sectors (biotech, consumer tech, single-product companies) routinely see 30%+ swings.
3. Sort lots by tax efficiency. Always tender lots that produce LTCG first; tender lots that produce STCG or ordinary income only if you would otherwise tender ISO shares within their qualifying-disposition window.
4. Coordinate with low-income years. If you expect a planned career break, sabbatical, parental leave, or relocation to a no-tax state coinciding with the lock-up release, defer ISO disqualifying dispositions to those years to compress the marginal-rate bill.

RSU vs option differences at IPO — the long-tail asymmetry

Beyond the tender event itself, RSUs and options behave differently as the IPO approaches and after the lock-up releases. The asymmetry matters for sequencing decisions:

RSUs

• Forced settlement at IPO (or earlier liquidity event) regardless of intent. No exercise decision.
• Full FMV at settlement is ordinary income — no AMT, no holding-period optimization at settlement.
• Post-settlement holding produces normal capital-gain treatment (LTCG after 12 months from settlement).
• Lock-up restricts post-settlement shares but does not delay the W-2 income recognition.

ISOs (still unexercised at IPO)

• Exercise is voluntary — you choose when, with AMT as the cost.
• Exercising before IPO at low FMV minimizes AMT exposure; exercising after IPO at full FMV maximizes it.
• The 2-year-from-grant and 1-year-from-exercise clocks must align with the lock-up release to capture qualifying-disposition LTCG treatment.
• Cash cost of exercising at IPO-era FMV is often prohibitive (a $5 strike on shares trading at $80 with 50,000 options requires $250,000 cash for the exercise itself plus AMT).

NSOs (still unexercised at IPO)

• Exercise creates ordinary income on the spread — taxed at marginal rates plus FICA.
• No qualifying-disposition framework; the spread is always ordinary income regardless of holding period.
• Capital-gain holding clock starts on exercise date — 12 months for LTCG on any post-exercise appreciation.
• Often used as a forcing mechanism by companies that want employees to time exercises during predictable income years (companies set narrow exercise windows or require pre-clearance).

The lock-up math against the tender discount

A simple decision framework for the tender-vs-hold question:

Tender if: (1 − tender_discount) < expected_lock_up_drawdown

If the tender is at $40 and recent comparable IPO prices suggest $60 fair value, the tender discount is 33%. If the company has high volatility and the lock-up is 180 days, expected drawdown during the lock-up could be 20-40% in a bear market. The math becomes situational. Concentration risk and personal cash needs typically dominate the abstract discount calculation.

For employees with high concentration (above 40% of net worth in employer equity), tender as much as the cap allows. The marginal utility of additional concentration reduction is enormous; the foregone upside from the tender discount is bounded.

Key takeaways

• Pre-IPO tender offers create three different tax events depending on instrument: RSU constructive-receipt ordinary income under IRC sec. 451, ISO disqualifying-disposition ordinary income under IRC sec. 422 when sold within the holding periods, and capital gain/loss for previously exercised NSOs based on the post-exercise appreciation.
• A tender of sufficient size and structure can force RSU settlement on the entire vested portion — independent of how many shares the employee elects to tender. The full vested FMV becomes W-2 income at the tender date.
• Sort lots for tender by tax efficiency: long-held NSOs first (LTCG), then RSU shares (settlement at tender price = zero incremental gain), then short-term NSOs, then ISO shares only if no other option.
• IPO lock-ups typically run 180 days post-pricing under contractual restrictions. SEC Rule 144 imposes a separate 6-month restricted-stock holding period and ongoing volume limits for affiliates.
• The participation decision balances tender discount (often 10-25% below expected IPO pricing) against lock-up drawdown risk on the unsold portion. Concentration risk above 30-40% of net worth usually justifies maximum tender participation.
• Previously paid AMT on ISO exercises generates Minimum Tax Credits under IRC sec. 53 that can recover much of the AMT when a subsequent disqualifying disposition forces the exercise spread to be reclassified as ordinary income for regular tax purposes.
• The most common tender mistake: tendering ISO shares within the qualifying-disposition window to maximize cash, then realizing the disqualifying-disposition ordinary-income hit dwarfs the tender discount that would have been forgone by waiting.