How secondary shares are actually priced

Ask what a share of a public company is worth and the answer is a quote. Ask what a share of a private company is worth and the answer is a negotiation — anchored to a number that may be two years stale, adjusted by factors most first-time sellers have never priced, and settled between two parties with very different information. This is the mechanics of that negotiation: where the anchor comes from, what moves a price away from it, and why the same market prices most companies at a discount while a handful clear at premiums.

The anchor: last round price

Every private secondary starts from the same reference point: the price per share of the company's most recent primary round. It is the only number both sides can verify, it was set by a sophisticated investor with information rights, and it is recent enough — usually — to mean something. Secondary prices are therefore quoted relative to it: "20% below the Series D," "at the last round," "a 40% premium to the 2024 mark."

The anchor's weakness is its age. A round priced in a hot market two years ago says little about today. When conditions shift, secondary prices move first — which is why funds and data providers increasingly treat secondary marks as the more honest signal of what a company is currently worth, and why a wide gap between last round and secondary price is itself information.

Why the default is a discount

Most private shares change hands at a 10–30% discount to the last round, and the reasons are structural rather than sentimental. The buyer typically gets fewer rights than the primary investor who set the anchor price: no board seat, often no information rights, and frequently common stock rather than preferred — meaning no liquidation preference standing between them and a bad outcome. The buyer also inherits the seller's illiquidity, with years until an exit and no guarantee of one, and underwrites an information gap: the seller usually knows more, and the price must compensate for that asymmetry.

Stack those three factors — lesser rights, continued illiquidity, thinner information — and the standard discount stops looking like pessimism and starts looking like arithmetic.

Why the exceptions trade at premiums

A small tier of companies — the SpaceXs, Stripes, and leading AI labs of the moment — consistently clears above the last round. The mechanism is simple scarcity: demand from investors who missed the primary round vastly exceeds the shares available, because the company controls transfers tightly and rarely lets much stock move. In these names the secondary market functions as a waiting list with a price, and each successive tender or block trade becomes the new de facto mark — often ratified later when the next primary round prices at or above it.

The result is a sharply bifurcated market: a small group of names at premiums, everything else at discounts, and very little in between. Averages mislead here; the split is the story.

What moves a specific price

Around the anchor-and-discount baseline, a handful of factors do most of the work. Proximity to exit compresses discounts — a company with a credible IPO path within eighteen months trades tighter than one without a story. Share class matters: preferred stock with a liquidation preference is worth genuinely more than common, and pricing that ignores the difference is mispricing. Company consent shapes everything: a transaction the company blesses (as in a tender) clears cleanly, while one it merely tolerates carries process risk that buyers price in. And block size cuts both ways — a large, clean block can command a premium for its convenience or a discount for its rarity of buyers, depending on the name.

How the numbers are converging

The information gap that justified the deepest discounts is narrowing. Specialist marketplaces now publish indicative pricing and volume for hundreds of private names, recurring tender programs give the biggest companies something like a periodic official print, and dedicated secondary funds mark positions quarterly. None of this makes private pricing public-market transparent — but it has pulled the bid-ask spread in for well-known names, and made "what's it worth?" a question with a defensible answer rather than a shrug. For how these prices get agreed in an actual transaction, seehow a secondary deal works; for the vocabulary, the glossary defines every term used here.