How Secondary Sales Work for Startup Employees: Selling Your Shares Before an IPO

For most of the history of venture-backed startups, equity was illiquid. You got shares or options, you waited for an IPO or acquisition, and only then did you find out what those shares were actually worth. The wait was often a decade or more.

The secondary market for private company stock has changed that, at least partially. Today, it's possible for employees at well-known startups to sell some of their shares before the company goes public — generating real liquidity years before the traditional exit event. But the mechanics are complex, company approval is almost always required, and there are significant tax and legal considerations.

Here's how it actually works.

What Is a Secondary Sale?

A secondary sale is a transaction in which an existing shareholder — an employee, a founder, or an early investor — sells their shares to another buyer. The money goes to the seller, not to the company. (This distinguishes it from a primary transaction, where the company sells new shares and the proceeds go to the company.)

In the startup context, secondary buyers are typically:

• Institutional secondary funds that specialize in purchasing private company stock (firms like Greenoaks, Lexington Partners, and others)
• Other VCs looking to get exposure to a company they didn't invest in at an earlier stage
• Individual accredited investors seeking pre-IPO exposure
• Platforms like Forge Global, EquityZen, or Hiive that connect sellers with buyers

The buyer gets shares in a private company. The seller gets cash — real liquidity — for shares that would otherwise be locked up.

The Two Main Types of Secondary Transactions

Tender Offers

A tender offer is a company-organized secondary transaction. The company (often with investor support) sets up a structured program where employees can sell a portion of their shares at a specific price, to a specific set of approved buyers, during a defined window.

Tender offers are the cleanest secondary mechanism for employees. The company controls the process: it sets the price (or allows the market to set it within a range), approves the buyers, manages the legal documentation, and typically handles the tax withholding.

For employees, tender offers are relatively simple: the company communicates the offer, you decide how much you want to sell within whatever limits are set, you indicate your election, and you receive cash when the transaction closes.

Companies like Stripe, SpaceX, and many other high-profile startups have run regular tender offers — sometimes annually — to give employees liquidity without going public.

Private Secondary Sales

Outside of company-organized tender offers, employees sometimes attempt to sell their shares privately — finding a buyer on their own, through a secondary platform, or through a broker.

Private sales are where the friction lives. Before comparing secondary sales vs tender offers in venture-backed companies any further, you need to understand the two forces that govern every employee sale: transfer restrictions and taxes.

ROFR and Transfer Restrictions: The Company Controls the Gate

Nearly every venture-backed company's stock agreements include a right of first refusal (ROFR): if you find an outside buyer at an agreed price, the company (and sometimes its major investors) can step in and buy your shares at that same price instead. The ROFR window commonly runs 30 days or more, during which your deal is frozen. Many buyers walk away rather than spend weeks negotiating a trade the company can simply take from them.

ROFR is only the first gate. Companies routinely layer on outright transfer restrictions requiring board consent for any sale, blanket bans on transfers to competitors, and prohibitions on forward contracts or other synthetic workarounds. Some companies enforce these aggressively; violating them can void the transfer or, in some agreements, trigger repurchase rights against you. The practical takeaway: read your stock plan, your option agreement, and any stockholder agreement before you talk to a single buyer — and assume nothing closes without the company's cooperation.

Tax Treatment: Where Secondary Proceeds Get Complicated

How your proceeds are taxed depends heavily on what you sold and how the deal was structured. The broad dynamics are worth understanding, but the specifics turn on your grant type, your exercise history, and even the transaction price relative to the company's 409A valuation — so treat everything below as orientation, and consult a tax advisor before you sell.

• Selling shares you already own (exercised long ago): appreciation is generally capital gain, and if you have held the shares more than a year, long-term rates typically apply — the most favorable common outcome.
• Exercising options and selling in the same transaction: the spread between your strike price and the sale price is generally treated as ordinary compensation income, not capital gain, and in a company-run deal it usually flows through payroll with withholding.
• Sales priced above the current 409A fair market value — common in tender offers — can cause some or all of the premium to be treated as compensation for employees rather than capital gain, depending on how the transaction is structured.
• QSBS: if your shares qualify as qualified small business stock and you have held them at least five years, a large portion of the gain may be excludable from federal tax — but the eligibility rules are strict and easy to trip, so confirm your specific situation with a tax advisor before selling shares you believe are QSBS.

The ordering matters more than most employees realize. Someone who exercised early, paid a small tax bill on a low spread, and held for years may sell in a secondary at long-term capital gains rates. A colleague with identical option grants who waits and does a same-day exercise-and-sell in a tender pays ordinary income rates on nearly the entire gain. Neither choice is universally right — early exercise costs cash and carries real risk of loss — but the tax gap between the two paths is often the largest single variable in what you keep.

Tender-Offer Mechanics, Step by Step

Because company-organized tender offers are how most startup employees actually get liquidity, it's worth knowing the standard sequence:

• Announcement and eligibility: the company announces the program and who can participate — commonly employees past a tenure or vesting threshold — along with a cap on how much each person can sell, often expressed as a percentage of vested holdings.
• Pricing: a single price applies to everyone, typically anchored to a recent financing round or a fresh 409A-informed valuation, with the buyer usually a new or existing institutional investor.
• Election window: you get a defined period — tender offer rules generally require at least 20 business days — to review the disclosure documents and decide how many shares or options to tender, up to your cap.
• Closing and settlement: the company collects elections, handles the ROFR and consent mechanics internally, runs applicable proceeds through payroll withholding where the tax treatment requires it, and wires the balance.

Contrast that with the bilateral route — you source the buyer, negotiate the price, survive the ROFR window, pay your own legal costs, and handle your own estimated taxes — and the appeal of the structured program is obvious. The trade-off is control: you sell when the company decides to run a tender, at the company's price, up to the company's cap. For a fuller comparison of the two paths, see our breakdown of tender offers vs secondary sales, and for how these transactions differ from the company raising money at all, primary capital vs secondary sales.

Before You Sell: A Short Checklist

• Read your equity documents for ROFR, consent requirements, and transfer bans before contacting any buyer or platform.
• Know exactly what you own — ISOs, NSOs, RSUs, or exercised shares — and how long you've held it; the tax outcomes differ dramatically.
• Check the company's most recent 409A value and last-round price so you can judge whether an offered price is reasonable.
• Model the after-tax number, not the headline number, and get a tax advisor involved before you commit to sell — especially if QSBS might apply.

Secondary liquidity is one of the best developments for startup employees in the last two decades — but it rewards the people who understand the mechanics. Know your documents, know your tax position, and treat a company-run tender as the default path when one is available. For the fundamentals of how your stake fits into the broader ownership picture, start with our cap table guide.