A liquidity event is a transaction that converts an owner’s illiquid stake in a company — founder shares, employee equity, or a fund’s position — into cash or into securities that can be freely sold.
In plain terms
For most of a private company’s life its stock is a number on a document. It cannot be sold, borrowed against on ordinary terms, or spent. A liquidity event is the moment that changes: the company is acquired for cash, it lists on a public exchange, or it arranges a tender offer so existing holders can sell. The term is broad because the mechanisms differ enormously while the effect is identical — an asset that could not be turned into money now can be. It is the most common route by which someone becomes wealthy in a technology career, and the point at which almost every other question on this site starts to apply.
How it works
The dominant form is not the one people picture. In 2025, PitchBook and the National Venture Capital Association counted 995 acquisitions of US venture-backed companies against 62 public listings — roughly sixteen sales for every flotation, with acquisitions about 94% of all exit events. The IPO is the visible case and the statistical exception.
Each form releases money on its own schedule. An acquisition for cash pays at closing, less whatever is held in escrow against the seller’s representations. A stock-for-stock acquisition pays nothing until the acquirer’s shares are sold. An IPO creates a market but not immediate access, because underwriters require a lock-up agreement, conventionally 180 days, before insiders may sell.
After the lock-up, two further gates apply. Rule 144 sets a six-month holding period for restricted securities of a reporting company — generally satisfied by the time a 180-day lock-up expires — and imposes volume limits on affiliates. Officers and directors selling on a schedule use a Rule 10b5-1 plan, which under the SEC’s 2022 amendments carries a cooling-off period of at least 90 days, and up to 120, before the first trade.
The numbers
- US venture-backed exits, 2025: 995 acquisitions worth $112.7 billion against 62 public listings worth $119.4 billion (PitchBook-NVCA Venture Monitor) — about 94% of exit events, 49% of exit value.
- US IPOs, 2025: 202 completed, raising $44 billion, the strongest year for new listings since 2021 (Renaissance Capital).
- Standard IPO lock-up: 180 days from pricing.
- Rule 144 holding period: six months for restricted securities of a reporting company; one year for a non-reporting company.
- Rule 10b5-1 cooling-off period: at least 90 days, capped at 120, for Section 16 officers and directors; 30 days for everyone else.
- Typical M&A escrow: a slice of the purchase price withheld roughly 12 to 18 months.
- Jurisdiction: United States securities and tax law.
What people get wrong
That a liquidity event produces liquidity. It produces a taxable event, and the two run on different calendars. Income is generally recognized when shares are delivered or a sale closes, but the cash can be sitting behind a 180-day lock-up, a cooling-off period, an escrow release eighteen months out, or acquirer stock that has fallen since the deal was signed. The bill is denominated in dollars at a valuation set on the event date; the proceeds are worth whatever the shares are worth whenever they can actually be sold. People have owed tax on gains that had already evaporated by the time the money was reachable.
The second misreading treats the event as an endpoint. It is a conversion: one concentrated, illiquid, untaxed position becomes a diversified, liquid, taxed one, and every decision that follows is a different problem from the one that produced the windfall. The recognizable failures after a windfall are usually failures of the year after, not the day of.
Related
Read more: Sudden Wealth: Liquidity Events, Lottery Winners, Athletes, and Inheritance Shocks · Tech Wealth: How Founders and Investors Live Differently · Liquidity: How Much Cash the Wealthy Actually Keep
See also: Tender offer · RSU · QSBS · 10b5-1 plan