A secondary sale of private company stock is a transfer of already-issued shares from one shareholder to another buyer, with none of the money going to the company that issued the stock. The seller cashes out; the buyer takes their place on the cap table; the company’s share count and bank balance do not change. These deals have become one of the few realistic ways for employees, founders, and fund investors to get liquidity, because the median company now takes roughly 12 to 14 years to reach an IPO.
Secondary Versus Primary Sales
The difference is where the money lands. In a primary sale, the company creates new shares and sells them to investors; the cash funds the business and the share count goes up. A Series A round is the standard example. In a secondary sale, one existing shareholder sells existing shares to a buyer. The purchase price flows entirely from buyer to seller, and total shares outstanding stay the same.
Some funding rounds blend both. A company might issue new shares to raise capital while also letting a few early investors or employees sell some of their holdings to the same buyer group. The primary and secondary portions close together but are treated separately for regulatory and mechanical purposes.
How These Deals Get Done
Three structures cover almost every private secondary transaction.
A direct negotiated sale is the simplest. The seller and buyer agree on a price, sign a stock purchase agreement, and close after the company approves the transfer. This is typical for large blocks moving between institutional investors.
A tender offer is common when a company wants to give employees controlled liquidity. A third-party buyer, or sometimes the company itself, offers to purchase shares from a defined group of shareholders at a fixed price. Employees tender their shares and the transaction closes on a set schedule. The standardized pricing and paperwork make it efficient across many small sellers.
Dedicated secondary marketplaces are the third channel. Online platforms match buyers and sellers, handle compliance paperwork, and usually require the company’s consent before any transfer closes. They work best for smaller, fragmented blocks. Platform commissions typically run 2% to 5% of the transaction value.
Contractual Transfer Restrictions
Private shares come wrapped in contractual restrictions designed to keep the company in control of who owns its stock. Most deals live or die at this stage, so read the shareholder agreement before you start negotiating a price.
Right of First Refusal
Nearly every venture-backed company’s shareholder agreement includes a right of first refusal (ROFR). Once the seller finds a buyer and agrees on a price, the company (and sometimes its existing investors) can step in and buy the shares on the same terms. The seller has to formally notify the company and wait for the ROFR holders to accept or waive. This process can add weeks or months to a timeline.
Co-Sale Rights
Co-sale rights, also called tag-along rights, let other shareholders piggyback on a deal. If a major shareholder negotiates a secondary sale, holders of co-sale rights can demand the chance to sell a proportional amount of their own shares into the same transaction on the same terms. That protects smaller shareholders, but it also increases the total shares the buyer has to absorb.
Lock-Ups and Board Approval
Many agreements block transfers for a set period after a primary round or an employee equity grant. Even after any lock-up expires, nearly every private company requires formal board approval before a share transfer closes. The board uses that gatekeeping power to track the cap table, enforce its contractual rights, and screen new shareholders.
Securities Law Exemptions for the Resale
Every sale of a security in the United States must be registered with the SEC or fit within an exemption. Private secondary sales are not registered, so the parties have to identify which exemption applies. Sellers who skip this step can create real liability for themselves.
Section 4(a)(1) and the “4(a)(1½)” Approach
Section 4(a)(1) of the Securities Act exempts “transactions by any person other than an issuer, underwriter, or dealer.”1Office of the Law Revision Counsel. 15 U.S. Code 77d – Exempted Transactions A shareholder selling their own shares is not an issuer or a dealer, so the question is whether they count as an underwriter. If the seller acquired the shares as an investment and is reselling in a private transaction to a sophisticated buyer, they generally aren’t an underwriter, and the exemption applies.
In practice, counsel often structures these deals under what’s informally called the “Section 4(a)(1½)” exemption. That isn’t a separate statute. It’s a hybrid approach combining Section 4(a)(1)’s non-underwriter exemption with Section 4(a)(2)’s private placement requirements: the sale must be genuinely private, limited to a small number of sophisticated or accredited buyers, and conducted without general solicitation.
Section 4(a)(7)
Congress created a formal safe harbor for secondary resales in 2015. Section 4(a)(7) exempts resales of restricted securities to accredited investors, with conditions on how the securities are marketed and what information must be provided to buyers.2U.S. Securities and Exchange Commission. Private Secondary Markets It gives sellers a clearer checklist than the informal 4(a)(1½) route.
Rule 144
Rule 144 is a separate safe harbor, mainly relevant when restricted or control securities will be resold into a public market. It requires a minimum holding period before resale: six months for securities issued by SEC-reporting companies, and one year for securities issued by non-reporting companies, which includes most private startups.3U.S. Securities and Exchange Commission. Rule 144 – Selling Restricted and Control Securities Affiliates of the issuer also face volume limits capping how many shares they can sell in any three-month period.4eCFR. 17 CFR 230.144 – Persons Deemed Not to Be Engaged in a Distribution and Therefore Not Underwriters
Regulation D Is Not Available Here
One misconception is worth flagging. Regulation D exemptions are available only to the issuer of the securities, not to shareholders reselling them. The regulation states that it “provides an exemption only for the transactions in which the securities are offered or sold by the issuer, not for the securities themselves.”5eCFR. 17 CFR Part 230 – Regulation D – Rules Governing the Limited Offer and Sale of Securities Without Registration A secondary seller cannot rely on Rule 506 or any other Regulation D provision to exempt the resale.
Anti-Fraud Rules Still Apply
Whichever registration exemption fits, federal anti-fraud rules apply in full. SEC Rule 10b-5 makes it unlawful to make an untrue statement of material fact, omit a material fact that would make other statements misleading, or engage in any act that operates as fraud in connection with a securities transaction.6eCFR. 17 CFR 240.10b-5 – Employment of Manipulative and Deceptive Devices Both sides of a private secondary deal have an obligation not to lie about or conceal material information.
The risk is especially acute for company insiders. A founder or executive who sells while aware of material nonpublic information (a failed product launch, a lost major customer, an impending down round) can face SEC enforcement and private lawsuits. Insiders sometimes adopt written trading plans under Rule 10b5-1 before they know any material nonpublic information, which can provide an affirmative defense against insider trading claims if properly structured.7Securities and Exchange Commission. Insider Trading Arrangements and Related Disclosures
Tax Consequences for the Seller
A secondary sale produces a capital gain or loss equal to the sale price minus the seller’s adjusted basis. Basis is generally what the seller paid for the shares, including any option exercise price, with adjustments for events during the holding period.8Internal Revenue Service. Topic No. 409 Capital Gains and Losses Shares held more than a year qualify for long-term capital gains rates, which are meaningfully lower than ordinary income rates for most taxpayers.
Sellers who acquired their shares directly from the issuing corporation may qualify for a substantial exclusion under Section 1202 of the Internal Revenue Code, which covers Qualified Small Business Stock (QSBS).9Office of the Law Revision Counsel. 26 USC 1202 – Partial Exclusion for Gain from Certain Small Business Stock For QSBS acquired after July 4, 2025, the exclusion is graduated: 50% of the gain is excluded after a three-year hold, 75% after four years, and 100% after five years. The cap per issuer is the greater of $15 million or ten times the seller’s adjusted basis. The company must be a domestic C corporation with aggregate gross assets not exceeding $75 million and must operate in a qualifying industry (professional services firms, financial services companies, and businesses built around the reputation of specific individuals are excluded).
There’s a critical catch for secondary market participants. QSBS benefits are almost always restricted to shareholders who acquired their stock directly from the issuing corporation. Shares bought on the secondary market from another shareholder generally do not qualify for the Section 1202 exclusion no matter how long the buyer holds them. Buyers pricing a secondary purchase should not build QSBS tax savings into their return math.
Sellers should expect their tax position to shape negotiations. A seller with a large unrealized gain has a higher minimum acceptable price than one whose basis is close to current value, and buyers who understand that dynamic sometimes use it as leverage.
Pricing and Costs
Secondary shares rarely trade at the price of the company’s last primary funding round. Private shares carry transfer restrictions and limited liquidity, and buyers demand a discount to compensate. Discounts of 20% to 30% relative to the last primary valuation are typical for companies on normal growth paths. Shares in companies with stale peak-era valuations or uncertain revenue can trade at 40% to 60% discounts. The discount narrows, and can flip to a premium, when performance has clearly outpaced the last round and a credible IPO is within about 12 months.
Both parties should budget for transaction costs on top of the share price. Legal counsel is usually the biggest line item: a simple direct sale between two institutional parties might generate $10,000 to $25,000 in combined legal fees, and a more complex deal with multiple sellers or unusual share classes will cost more. If the deal runs through a secondary marketplace, the platform commission of 2% to 5% comes off the top; some platforms charge the buyer, some the seller, some split it. The company itself may also charge a transfer fee to cover the cost of updating the cap table and processing the board approval.
Diligence is harder for a secondary buyer than for a primary investor. The company isn’t raising money and has no obligation to open its books, so verifying that the shares are transferable, that they carry no undisclosed encumbrances, and that the seller has clear title all fall on the buyer.