Startups stay private far longer than they used to. The median venture-backed company that exits now does so well over a decade after founding, which means founders and early employees can spend years holding equity that is worth a great deal on paper and nothing in their bank account. Secondary sales -- selling private shares before the company exits -- have become the pressure-release valve for that gap.
Done well, a secondary lets a founder de-risk a life's savings or a long-tenured engineer buy a house without anyone leaving. Done badly, it leaks confidential information, creates a 409A problem, or signals to investors that the people closest to the company want out. This guide explains how secondaries and tender offers work, how they are taxed, and what a founder needs to manage before, during, and after one.
The Short Answer
A secondary sale is the sale of existing shares by a current shareholder -- a founder, employee, or early investor -- to a buyer, rather than the company issuing new shares to raise capital. The money goes to the seller, not the company.
A tender offer is a structured, company-sanctioned secondary in which a buyer (often an incoming or existing investor) offers to purchase shares from many holders at once, at a single price, during a defined window. It is the most common way companies provide broad employee liquidity without going public.
The distinction that matters: a primary round funds the company; a secondary provides liquidity to the people who already own shares. Many late-stage financings now bundle both -- a primary raise alongside a tender that lets early holders sell a slice.
The Two Shapes of a Secondary
Company-organized tender offers. The company coordinates the whole thing: it sets the price, sets eligibility (often "vested shares only, employees with 2+ years of tenure, up to X percent of holdings"), runs the paperwork, and the board approves it. This is the structured, controlled path. Stripe, SpaceX, and many others have run recurring tenders precisely because it lets employees realize value while keeping the company private and on its own timeline.
Individual secondaries. A single shareholder negotiates a private sale of their shares to a buyer. These are common but fraught: most startups have transfer restrictions, a right of first refusal (ROFR), and board-approval requirements written into the stock agreements and bylaws. A shareholder generally cannot just sell to whomever they like. Unauthorized transfers can be void, and they routinely surprise employees who assumed their vested shares were freely theirs to sell.
For founders running a company, the choice is usually whether to sanction a controlled tender or to keep saying no to one-off individual requests. A controlled tender is almost always the cleaner answer.
How Secondaries Are Priced -- and the 409A Connection
A tender offer establishes a price for common stock that real buyers are actually paying. That is exactly the kind of arm's-length data point a 409A appraiser cannot ignore.
A secondary that clears at a price well above your current 409A common-stock value can push your 409A up, raising the strike price on future option grants and making new hires more expensive to compensate. Conversely, a thin or distressed secondary at a discount can be evidence of a lower fair market value.
This is why secondaries and the 409A have to be planned together. Key factors an appraiser weighs include the volume of shares transacted, whether the buyers were informed (had access to company financials), and whether the price reflects common or preferred stock. A small, one-off sale by a departing employee carries less weight than a large, well-subscribed tender. Founders who ignore this can be surprised when a generous employee tender quietly resets the cost of their next 50 hires. See our 409A valuation guide for how appraisers incorporate secondary data.
How Secondaries Are Taxed
The tax treatment depends on what you are selling and how long you have held it.
- Founder and long-held stock. If you have held the shares more than a year, the gain is long-term capital gain. If the stock qualifies as QSBS and you have met the holding period, a large portion or all of the gain may be federally excludable -- a secondary can be a way to realize QSBS-eligible gain before an exit. See our QSBS guide.
- Selling shares from exercised options. Your gain is measured from your exercise-date basis. Watch the holding-period line between short-term and long-term rates.
- Selling shares you have to exercise first. Some tenders require you to exercise options to participate. That exercise itself can trigger tax (ordinary income on NSOs, AMT on ISOs) on top of the gain from the sale. Model the combined bill before you opt in.
- Cashless or "net" structures. Some programs let you exercise and sell in one motion, but the tax characterization still follows the underlying option type. The convenience does not change the tax math.
Because a tender often forces an exercise-and-sell in the same year, the all-in tax bill can be materially higher than employees expect. This is precisely the kind of thing finance should model and communicate before the window opens.
What a Founder Has to Manage
A secondary is not just a transaction; it is a signal and an operational project. The things that go wrong are predictable:
Information rights and confidentiality. Buyers in a tender usually need financials to price the deal. Deciding what to share, with whom, and under what NDA is a real governance question. Leaking a metrics deck into the secondary market is a recurring own-goal.
The signal to investors. How much founders sell, and when, is read closely. A founder taking a modest secondary to remove personal financial pressure is widely accepted and often encouraged by investors who want their founders focused. A founder selling a large fraction reads very differently. Frame it deliberately and discuss it with your lead investors before it surprises them.
Cap-table hygiene. Every secondary changes who owns the company. Transfers have to flow through the ROFR process, board approval, and the cap-table system of record. Unrecorded or improperly approved transfers create diligence problems that surface at the worst possible time -- during your next financing or your exit.
Fairness and access. A tender that is open to executives but not to the engineers who built the product creates morale problems that outlast the liquidity. Decide eligibility rules that you can defend to the whole team.
Securities-law compliance. Tender offers and broad secondary programs are regulated. Above certain participant thresholds, specific disclosure and procedural rules apply. This is counsel-and-CFO territory, not a do-it-yourself project.
When a Tender Offer Makes Sense
A company-run tender is usually the right tool when:
- Employees have been around long enough that retention is at risk without some liquidity, and you would rather give it on your terms than watch people leave to monetize.
- You are raising anyway, and an incoming investor is willing to buy secondary alongside their primary check.
- The company is strong enough that a clean, well-priced tender sends a confidence signal rather than a distress signal.
It is usually the wrong tool when the company is fragile, when a secondary price would set an embarrassing or 409A-damaging mark, or when you cannot run it fairly across the team.
Common Mistakes
Selling individual shares without checking transfer restrictions. Employees routinely try to sell vested shares only to discover the ROFR, board-approval, and transfer-restriction clauses that make the sale impossible without the company's cooperation.
Ignoring the 409A impact. A generous employee tender can raise your common-stock valuation and the strike price on every subsequent grant. Plan the 409A refresh around the tender, not after it.
Underestimating the tax bill on forced exercises. Tenders that require exercising options first can create a combined exercise-plus-sale tax event that catches participants off guard.
Letting the cap table drift. Transfers that do not flow through proper approval and recording become diligence landmines. Reconcile the cap table after every secondary.
Mismanaging the signal. Large or poorly communicated founder secondaries can spook investors. Get ahead of it with your board.
What We Recommend
- If you are a founder fielding individual liquidity requests, consider whether a controlled, company-run tender is a better answer than a series of one-off approvals. It is fairer, cleaner, and easier to govern.
- Plan the 409A around any secondary, so the valuation impact on future grants is intentional rather than a surprise.
- Model the full tax picture for participants -- including any required exercise -- and communicate it before the window opens.
- Keep the cap table reconciled after every transfer, with all approvals documented.
- Treat confidentiality and investor communication as part of the deal, not an afterthought.
Secondaries are one of the more powerful retention and de-risking tools available to a private company, but they touch valuation, tax, governance, and morale all at once. We help founders structure and run liquidity programs so they strengthen the company rather than complicate it. If you are weighing a tender offer or a founder secondary, book a free consultation and we will map out the implications for your specific situation.
This article is general information, not tax, legal, or securities advice. Secondary transactions are regulated and fact-specific; involve qualified counsel and a tax advisor before proceeding.
