Beginner guide
A startup share is not a public stock
Follow Lin from an exchange-traded stock to a private-company share, and learn why ownership is not the same as cash.
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Reader question
If both are called shares, what could Lin sell today—and what would Lin actually own?
By the end
Explain the difference between a legal ownership interest and cash that is available to spend.
Fictional worked example: Lin owns a small amount of a listed company through a brokerage account. A former colleague later describes a startup share as “just like buying stock early.” Lin compares the two before treating them as interchangeable.
The public-stock screen gives Lin a visible reference point
Lin is a fictional software engineer in the United States. Lin has bought one share of a publicly traded company through a brokerage account. The account identifies the security, shows a current quoted price, and lets Lin submit an order during market hours. An order still depends on available buyers, trading conditions, and the type and price of the order; a screen is not a promise of an exact sale.
The important difference is that a listed share sits inside a public trading system. Many participants can see quotes and place orders. That system can make it easier to find a buyer, although prices move, markets can close, and a sale may happen at a different price than the last quote. A quoted price is information about a market, not money already in Lin’s bank account.
A private share is an ownership interest, not a cash balance
Now imagine a private startup offers Lin one share. If Lin buys it, Lin may receive a legal ownership interest in the company, with rights defined by the share class, the company’s governing documents, and applicable law. “One share” alone does not explain the percentage of the company: the total shares, other classes, options, warrants, and future issuances matter. Nor does the word automatically promise a board seat, a dividend, or a say in each business decision.
The company may keep its ownership records on a cap table or through a transfer agent. Lin should understand what document records the purchase, which class is being issued, what rights come with it, and what restrictions apply. The marketing label is not a substitute for those documents. Even a genuine share does not mean Lin can ask the company to return the purchase price on demand.
A way out may be limited or unavailable
Private offerings often involve restricted securities. Federal securities law and company documents may limit resale. A transfer can require an available legal pathway, company consent, paperwork, and a willing buyer. There may be no organized exchange, no continuous quote, and no one obligated to buy Lin’s share. A company-run tender offer or acquisition could create a chance to sell, but it may never happen and may involve conditions.
That is why a last financing price, a number in a presentation, and cash Lin can withdraw are three different things. A financing price can describe what particular investors paid under a particular set of terms. It does not establish that Lin could sell at that value today. When trades are infrequent and company information is limited, there may be no dependable market price for the share.
Failure can leave ownership with no value
Suppose the startup runs out of cash and shuts down. Equity holders are not promised repayment. A company’s available assets may first be used to pay creditors and other obligations; the exact result depends on facts, documents, and legal priorities. Common shares can end up worth nothing. Even if the business survives, it may take years to reach an event that lets Lin sell, and there is no guaranteed buyer or outcome.
Compare Lin’s public-stock account with the private share: one account balance may show a market quote and a sell-order route; the other may show a number of shares and purchase documents but no practical route to cash. Both can lose value. The private share adds a separate question: can Lin transfer it at all, and when?
What Lin can say after reading
Lin can now describe a private share without calling it cash: “I may own a defined interest in a company under these documents, but I cannot assume there is a buyer, a current market price, or a way to get my money back on a schedule.” That sentence separates what the security may represent from what Lin can spend.
The practical learning step is to identify the legal instrument, rights, transfer restrictions, and possible loss before focusing on a headline valuation. This guide is an educational explanation, not an assessment of Lin—or anyone else—for a particular offering.
Sources to read next
These primary sources provide legal and investor-education context. The factual explanations draw on the cited sources; only the original worked examples are fictional. The links do not mean the SEC reviewed or approved this publication.