What Happens to the Unused Option Pool When the Company Is Acquired?

Somewhere between signing and closing, a director will say the unused option pool "comes back to us." Everyone nods. It sounds like recovered value, and after eighteen months of hiring that never quite happened, recovered value is a pleasant thing to hear.

It is also imprecise in a way that costs a specific number of dollars.

Consider the career of an unallocated option pool. It is introduced during a financing as essential hiring capacity, and it is measured, argued over, and installed in the denominator that sets the investor's price per share. Then the roles get deferred, the plan changes, and most of the reserve is never granted to anyone. At closing it has no holder, so it receives no cheque. The one party that never expected to draw from it walks away holding the extra shares it bought because the reserve was counted.

The pool is gone. The concession is not.

The examples below use simplified US priced-round and all-cash merger arithmetic with no debt, transaction expenses, escrow, earnout, carve-out, or tax. Treat them as educational rather than as advice on law, tax, or investment in your own transaction. Your charter, equity plan, merger agreement, and capitalization definition determine the real allocation.

Under Delaware law, a merger agreement must state the manner of converting the shares of each constituent corporation and what the holders of those shares receive in exchange.³ That sentence contains the whole answer. Reserved plan shares have never been issued to anyone. There is no holder, and no issued share to convert.

The drafting convention shows this plainly. In the June 2023 merger agreement between Novartis, Cherry Merger Sub and Chinook Therapeutics, the capitalization representation counts each category separately as of the measurement date: 67,039,074 shares of common stock issued and outstanding, 7,856,866 shares subject to outstanding stock options, 1,704,710 subject to restricted stock units, 787,901 subject to performance stock units, and 12,542,630 shares reserved under the company stock plans "of which 2,155,447 were available for future grant."²

Then read the equity awards section. Unvested options vest in full, and each outstanding option is cancelled in exchange for the spread over the $40.00 closing amount plus one contingent value right for each underlying share. Outstanding RSUs and PSUs receive the closing amount plus a CVR per underlying share. Options priced at or above the closing amount are "canceled for no consideration."²

Search that section for the 2,155,447. It is not there. What the agreement does instead is direct the board to adopt resolutions "terminating the Company Stock Plans and the Company ESPP as of immediately prior to the Effective Time."² That is a cold way to end something the company once treated as strategic hiring capacity, and it is the ordinary outcome. The reserve was real enough to be represented to a buyer in a signed agreement. It was never real enough to have a holder.

The freeze starts earlier than closing. The same agreement's interim covenants prohibit granting equity awards during the pendency of the deal and permit share issuances only on the exercise or settlement of awards already outstanding when the agreement was signed.² From signing onward, the pool is a number in a representation with no path to becoming anyone's equity.

Take the same hypothetical company used in the option pool shuffle, and follow it all the way to a sale.

Before the round, the company has 10 million fully diluted shares: 8 million held by founders, 2 million held by existing investors, and no unallocated pool. The pre-money valuation is $10 million. A new investor puts in $2.5 million. The term sheet asks for an unallocated reserve of 1,428,571 shares, which is the number that leaves roughly 10% available after the round.

Everything about the operating plan is identical in the two versions below. The only difference is whether those 1,428,571 reserved shares sit inside the pre-money denominator used to price the round.

Both companies authorize the same reserve and can make the same grants. Only one of them charges the prior holders for it in advance. The investor's $2.5 million buys 357,143 more shares in the left column, which is about 14% more stock for the same money.

Orrick's financing guidance describes the standard fully diluted denominator as outstanding common and preferred, options, warrants, convertibles, and shares reserved under equity plans.⁴ It is a defensible convention. It is also a convention, and the National Venture Capital Association's model documents are published as starting points that parties are expected to tailor.⁵ Nothing about this arithmetic descends from statute.

Now sell the company for $20 million in cash, above the conversion crossover, so the preferred converts and every share is treated alike. Assume the extreme version first: not one option was ever granted, and the entire 1,428,571-share reserve lapses at closing.

The reserve was worthless in both columns. It lapsed the same way, on the same day, for the same reason. The $444,000 gap in the investor's row is the entire remaining trace of a hiring plan that never happened, and it is a permanent transfer from the founders and existing investors who funded the denominator. Same company, same buyer, same empty pool, and the investor's multiple is 1.78x on the left against 1.60x on the right.

This is the part that does not reverse. The investor paid a price that assumed the whole reserve would become employee equity. The reserve did not become employee equity. Nobody issued a refund, because no term in any document promised one.

Partial grants change the numbers without changing the direction. Suppose 900,000 of the reserved shares were granted at a $0.10 exercise price, all vested, all cashed out for the spread, while 528,571 shares were never granted. Adding the option proceeds to the consideration and spreading it across 13,757,143 shares gives $1.4603 per share:

Granted shares dilute the exit. Ungranted shares do not. The financing priced all of them as though they would be granted.

That asymmetry explains why the folklore is dangerous rather than merely vague. The lapsed reserve does redistribute, and it redistributes pro rata across everyone still holding something, which includes the investor whose block was enlarged by counting the reserve in the first place. In this example the investor collects about 20% of the value that "came back to the founders." Read the liquidation preference waterfall before assuming the other 80% lands where you expect either.

The negotiating record for this is public, and it is unusually explicit.

When Pardes Biosciences was going public through a merger with the SPAC FS Development Corp II in 2021, the parties exchanged indications of interest that priced Pardes on a pre-money valuation. On May 20, 2021, Pardes returned a revised draft proposing a fixed $330 million pre-money valuation regardless of the PIPE amount and "removing the unallocated Pardes's options from the pre-money valuation calculation."¹

The next day they signed an amended and restated IOI. Its material terms included a fixed pre-money valuation of $300 million and, expressly, that "the unallocated Pardes's options will be removed from the pre-money valuation calculation."¹

Pardes asked for a higher number and a smaller denominator, and the executed document kept the denominator change while the stated pre-money valuation came down by $30 million. Several other terms moved in the same exchange, so the trade was not priced line by line in the filing. What the record does establish is that sophisticated counsel on both sides handled unallocated options as a live, separately negotiated term worth writing down next to the valuation, in a transaction where the entire company was changing hands.

If the denominator were a law of nature, there would have been nothing to draft.

The definitions that decide your closing payment are transaction-specific. Before signing, read for these:

1. The consideration denominator in the letter of intent. A price expressed as a per-share amount over a "fully diluted" share count is only as good as the shares in that count. Ask in writing whether unallocated plan shares are inside it. If they are, the reserve is charged against the sellers a second time, at exit, having already been charged at financing.
2. Which awards receive consideration. Outstanding options, RSUs, and performance awards each get their own paragraph. Underwater options are commonly cancelled for nothing.
3. Whether unvested awards accelerate. The Chinook agreement accelerated every outstanding option, RSU, and PSU in full immediately prior to the effective time.² Other deals assume awards, substitute them, or leave the vesting schedule running inside the buyer.
4. Plan termination timing. Once the board resolves to terminate the plans as of immediately prior to closing, remaining capacity stops existing.
5. The interim grant covenants. After signing, the operating restrictions typically forbid new equity awards altogether.²
6. Promises that never became grants. The Chinook agreement handles this with a defined term. The company was required to pay a cash bonus to each "Promised Grantee," meaning a person "who has been promised an equity interest in the Company" and who remained employed, in lieu of the promised equity.² A promise is not an award, and if you want the promise honoured, someone has to negotiate a line into the agreement that says so.

That last one deserves a moment. Every founder who has said "we'll get your options approved at the next board meeting" is describing a Promised Grantee. The document treats that person as a commercial issue to be resolved with cash, which is the correct treatment, and which also makes visible how little the verbal promise was worth on its own.

The reserve appears in two calculations that most companies only run once.

In the financing model, size the pool from named roles and grant ranges, then record what its position in the denominator did to the price per share. Keep the counterfactual: how many shares would the investor have bought if the reserve were priced after the money? Store that number with the closing documents. It is the concession, and it becomes invisible within a quarter if nobody writes it down. The dilution calculator will get you to a first pass; reconcile it against the executed capitalization schedule afterwards.

In the exit model, run the allocation over shares that will actually be outstanding at closing plus awards that will actually receive consideration, and put the ungranted reserve on its own line at zero. Then show the board what the lapsed reserve returns to each holder group, expressed in dollars. Not "it comes back to the common." Which common, and how much.

Between those two models, review the reserve against grants every board meeting. Unallocated capacity that has survived three quarters without a candidate attached to it is not a hiring plan. It is an unexercised argument about price, still sitting on the cap table, waiting for a closing call where somebody will describe it as good news.

Not as a distribution. Ungranted reserved shares have no holder and typically receive no consideration; the plan is terminated at or before closing. The effect is that the same total consideration is divided among fewer shares, which raises the per-share amount for everyone who does hold outstanding stock or a qualifying award. Founders benefit in proportion to their ownership, and so does every investor.

It depends entirely on how the buyer expressed the price. If the buyer offered a lump sum for all of the equity, then yes, fewer participating shares means a higher per-share amount. If the buyer offered a per-share price applied to a fully diluted count that includes unallocated plan shares, the reserve reduces what the actual holders receive. Get the denominator in the letter of intent before valuation becomes a matter of interpretation.

After signing, the interim covenants in most merger agreements prohibit it outright.² Before signing, a board can approve grants, and boards regularly do approve retention grants during a sale process. That decision carries fiduciary, disclosure, accounting, and tax consequences that a buyer will scrutinize in diligence and often price into the deal, so it belongs with counsel and the compensation committee rather than in a founder's mental model of fairness.

The mechanism generalizes wherever a company authorizes plan capacity that has not yet been issued to a person: an unissued reserve has no holder, so a share purchase agreement or scheme of arrangement has nobody to pay. The instruments differ. UK EMI options, French BSPCE, and employee trusts each carry their own rules on grant, exercise, and treatment on a change of control. Confirm the local answer with counsel in the jurisdiction of the entity being sold, and confirm it before you agree a per-share price.