Selling shares · Synthesia

How to sell your Synthesia stock

Hold vested shares or options in Synthesia (AI video, the United Kingdom)? Here's how a private secondary sale works, the rules that apply in the United Kingdom, who buys, and what to expect.

In January 2026, Synthesia reached a $4 billion valuation and ran a Nasdaq-backed employee secondary that let staff sell some vested equity (TechCrunch) — a real, if occasional, liquidity route for Synthesia holders.

Sector AI video · HQ the United Kingdom · Status Privately held · Reviewed October 2026

Synthesia is a private AI video company headquartered in the United Kingdom. If you hold vested shares or options in Synthesia and want to turn part of that into cash before an IPO or acquisition, this is a plain-English guide to how a private secondary sale actually works — and what's specific to Synthesia and to the United Kingdom.

Independent guide. PrivateTechShares is not affiliated with, endorsed by, or connected to Synthesia. This is general educational information for people who already hold Synthesia shares or options. Always check your own share/option agreements and take professional advice. We do not recommend or endorse any transaction: whether to buy or sell, and on what terms, is entirely the individual decision and responsibility of the buyer and seller, based on their own due diligence. What we do: we help you prepare — a clear picture of what you hold, what it may be worth, and the paperwork — so that when you decide to act, you are ready.

What's it worth?A realistic range for your Synthesia stake in seconds.
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Hold options?See what exercising would cost before you sell.
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Getting ready to decide?Prepare properly with the toolkit — or a report run on your own numbers.
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Can you sell Synthesia shares before an exit?

Often, yes. Selling existing shares you own in a private company to a private buyer, before the company is sold or lists, is called a secondary sale. It's possible for Synthesia shares if they're vested and transferable, and once you've cleared Synthesia's transfer rules. There's no public market for a private company, so a sale is a private, negotiated transfer — not a click of a button.

What you probably hold

First, pin down what you actually have. In the United Kingdom, startup equity is usually held as EMI options (which you exercise into shares first) or ordinary shares. You can generally only sell shares, so if you hold options you typically exercise them (pay the strike price to convert them into shares) before you can sell. Check your grant documents for your vested amount, strike price and any deadlines.

The rules that apply in the United Kingdom

How a sale works, and how it's taxed, depends on the rules in the United Kingdom — transfer formalities, any right of first refusal, and the tax on a gain. We've written a dedicated plain-English guide: selling startup shares in the United Kingdom. Read it alongside this page.

Who buys Synthesia shares

There are four realistic buyers, roughly in order: Synthesia itself (if it runs a buyback or tender), existing investors or shareholders (often via a right of first refusal), the investor in Synthesia's next funding round, and — when those don't apply — a private individual investor who wants exposure to Synthesia. Recognisable names like Synthesia tend to attract private-investor interest — but the hard part for a holder is understanding what you actually own, what it might be worth and how a private transfer works. That's what our guides and toolkit are for.

Where holders actually find buyers → A plain-English map of every route — company buybacks, tender offers, secondary platforms and investor networks — with a neutral directory for the US and Europe.

What to expect on price

A private, minority, all-cash secondary usually happens at a discount to Synthesia's last headline valuation — because the buyer takes an illiquid stake with no guaranteed exit, and because you likely hold common shares, which are worth less than investors' preferred shares. That's normal, not a trick. See what discount is fair for a realistic range.

For holders

Holding Synthesia equity? Get the occasional, no-noise update when something changes that could affect your position — we watch the private market so you don’t have to.

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Thinking about selling your Synthesia shares?

Exercising, holding or selling equity is usually a one-way decision. Doing it well takes a real assessment — what you hold, what it's realistically worth, the transfer rules that apply, and the tax. The equity toolkit is exactly that homework in one place: the free tools give you the numbers; the toolkit turns them into a decision you can stand behind.

Get the equity toolkit — $39

US edition · instant PDF, no sign-up · EU edition →

Hold options and weighing whether to exercise first? The exercise & tax calculators (US) and the valuation estimator can help you put a number on it.

Questions people ask

Can I sell my Synthesia shares before an exit?

Often yes. If you hold vested, transferable shares in Synthesia you can sell them to a private buyer in a secondary before an IPO or acquisition, subject to Synthesia's transfer rules — typically a right of first refusal and board or company approval. If you hold options rather than shares, you generally exercise them into shares first. Synthesia is a private company, so there is no public market; a sale is a private, negotiated transfer.

How much are my Synthesia shares worth?

There is no live price for a private company like Synthesia. A rough estimate starts from the price per share at its most recent funding round, adjusted for your share class (common shares are usually worth less than the preferred shares investors hold) and a discount for selling a private, minority, illiquid stake. Use our free valuation estimator as a starting point, and remember it is only an estimate.

Who buys Synthesia shares?

Four types of buyer: Synthesia itself (via a buyback or tender, if it runs one), existing investors or shareholders (often via a right of first refusal), the investor in an upcoming funding round, or a private individual investor seeking exposure to Synthesia. Well-known names often attract private-investor interest, which is why it helps to understand your shares and how a private transfer works before you start.

Do I need Synthesia's approval to sell my shares?

Almost always, yes. Synthesia, like most private companies, controls share transfers through a right of first refusal, transfer restrictions and board or company approval written into your equity documents. No marketplace or buyer can override that. Start by reading your grant and shareholder agreements and asking Synthesia's stock administration what is permitted.

What tax will I pay when I sell Synthesia shares or stock?

It depends on where you live and what you hold. In the United States, selling settled shares usually triggers capital-gains tax, and exercising options first can create a separate taxable event (including AMT on ISOs). In Europe the treatment varies by country. This is general information, not tax advice — confirm your own position with a qualified adviser before you sell.