Most secondary sale guides assume you have one thing to sell. In practice, a typical employee or early investor in a company that has been private for five or more years holds several distinct equity instruments: maybe incentive stock options (ISOs) at one or more strike prices, non-qualified stock options (NSOs) or non-statutory options from a reload grant, actual common shares from an early exercise or a prior restricted stock award that vested years ago, and possibly restricted stock units (RSUs) that settled more recently. Each of those is a different tax animal. Each may have different transfer restrictions. And each interacts differently with a secondary sale.
This guide is about the decision layer that comes before you negotiate price: which class do you sell, and what do you need to know before you choose?
Start with what you can actually sell
Not every instrument in your equity stack is transferable. Options that have not been exercised cannot be directly transferred in a secondary transaction — you must exercise them first, acquiring actual shares, before those shares can be sold. ISOs in particular carry restrictions on transferability by definition: an ISO that is transferred to anyone other than the original grantee automatically loses its ISO tax treatment and is treated as an NSO from the point of transfer. That conversion has significant tax consequences that your current tax advisor should walk through with you before you proceed.
RSUs that have vested and settled — meaning shares have been issued to you — are generally transferable subject to any company-level transfer restrictions in your equity plan documents. RSUs that are still in the vesting period are not settled shares; they are contractual rights and are almost never transferable. Check your grant agreement, not just your brokerage statement.
What remains after filtering for actual transferability is usually: fully vested, exercised shares of common stock. That is the universe you are pricing and choosing from.
The three variables that should drive your selection
1. Tax basis and holding period
The tax cost basis of your shares depends on how you acquired them. Shares from early exercise of ISOs under an 83(b) election have a basis equal to the exercise price at the time of exercise — often near zero for very early employees. Shares from NSO exercises carry a basis equal to the fair market value on the exercise date, because the spread was already recognized as ordinary income at exercise. Shares from a restricted stock award with an 83(b) election have a basis equal to the fair market value at grant. Each scenario produces a different gain calculation when you sell.
Holding period runs from the date of acquisition of the shares — not the date of the original grant. For a secondary sale to qualify for long-term capital gains treatment under federal rules, you generally need to have held the actual shares for more than twelve months. If you exercised options recently in anticipation of a secondary sale, your holding period may be short, and the gain could be taxed at ordinary income rates. Mapping your lot-by-lot holding periods before you select which shares to sell is not optional if tax efficiency matters to you.
2. QSBS eligibility
Shares that qualify as Qualified Small Business Stock under Section 1202 of the Internal Revenue Code may be eligible for a federal capital gains exclusion — up to 100 percent of the gain, subject to limits — if held for more than five years and if the company met the gross assets test at the time of issuance. QSBS eligibility is lot-specific: shares from a grant issued when the company was a small business may qualify even if later grants do not, because the company's gross assets may have grown beyond the $50 million threshold by the time of subsequent issuances.
If you have shares that may be QSBS-eligible, selling them in a secondary transaction ends the holding period. A five-year-and-three-month lot qualifies; a four-year-and-eleven-month lot does not. The gap between qualifying and not qualifying can represent a very large dollar difference on the same nominal gain. Confirm eligibility lot by lot with a qualified tax professional before deciding which shares to include in a secondary sale.
3. Concentration and remaining exposure
Beyond taxes, consider what position you want to hold after the transaction. Selling your oldest, lowest-basis shares captures the most efficient tax treatment but may also mean selling the shares with the highest potential remaining upside if an IPO or acquisition occurs at a premium to secondary pricing. Selling your newest, highest-basis shares reduces gain and keeps the historically seasoned lots intact — but those lots may also carry QSBS eligibility you want to preserve, creating a tension.
There is no universally correct answer. The right selection depends on your personal tax situation, your confidence in the company's trajectory, and how much liquidity you need now versus later. What matters is making the decision consciously rather than defaulting to the most recently acquired shares because that is what appears at the top of your account screen.
Transfer restrictions can override your preference
Even after you have identified the ideal lot to sell on tax grounds, the company's transfer policy may constrain which shares are eligible. Some equity plans restrict transfers of shares acquired through ISO exercise differently from shares acquired through NSO exercise. Some plans require company consent and apply that consent selectively based on share class or grant vintage. The Right of First Refusal (ROFR) applies at the company level to the proposed transfer, not to your internal lot selection — but the company's decision to exercise or waive ROFR can affect timing and ultimately which lots you have the opportunity to close before year-end.
Review your equity plan documents, your individual grant agreements, and any stockholder agreements you signed at the time of a funding round. These documents collectively define what you can transfer and under what conditions. If you have multiple share classes with different transfer mechanics, map them out before you enter negotiations with a buyer — surprises in documentation cause deals to fall through, and fall-throughs waste time on both sides.
Partial sales and lot sequencing
You are not required to sell your entire position in one transaction. Secondary sales of partial positions are common, and structuring a multi-tranche sale — selling one lot now and another lot in a future tax year — is a legitimate strategy to manage annual income recognition. The mechanics are the same as a full sale; you simply specify the shares you are transferring in the purchase agreement, and the remaining shares stay on your cap table.
If you are considering a forward contract structure rather than an immediate sale, lot selection interacts differently with holding period rules and constructive sale provisions. That adds a layer of complexity better addressed in dedicated legal and tax guidance, but the starting point is the same: know exactly what you own, at what basis, from what date, and with what restrictions.
Practical steps before you list
- Pull your complete equity ledger, including all grant agreements, exercise confirmations, and any 83(b) election acknowledgments you have on file.
- Map each lot: instrument type, grant date, exercise or settlement date, exercise price, fair market value at exercise (for NSOs), and current basis.
- Identify any lots with potential QSBS eligibility and confirm the five-year holding period status for each.
- Review the transfer restriction provisions in your equity plan and any side letters or investor rights agreements you are party to.
- Consult a tax professional on the lot-specific gain profile before you agree to a price — you need to know your net proceeds after tax, not just the headline purchase price.
Once you have that map, pricing conversations become more straightforward. You know your minimum acceptable net — the price that, after taxes on the specific lot you are selling, leaves you where you need to be. That number is your real floor, and it is the number that should drive your negotiation, not the secondary market's prevailing bid.
If you are ready to explore what your shares are worth on the current market, visit the seller section of the Limen Markets platform. Listing an indication of interest costs nothing, and confirmed buyer demand across our 28 issuers is updated hourly.