Common stock vs preferred stock, and what the difference pays.

First: two different things share this name

Search for “preferred stock” and you get two unrelated conversations stacked on top of each other. One is about the preferred shares that banks, utilities and REITs list on public exchanges — an income instrument that pays a fixed dividend and usually carries no vote. The other is about the preferred stock a venture investor buys in a priced round of a private company. They share a word and a position in the capital structure. Almost nothing else.

This page is about the second one: startup preferred, US private companies, Delaware C-corp as the default. That is the version that matters if you are a founder reading a term sheet or an employee holding options and trying to work out what the investors’ shares mean for your payout. The public-market version gets its own short section further down, covered honestly rather than ignored.

Preferred stock is common stock plus a list of rights

This is the frame that makes the whole topic click. Delaware General Corporation Law §151(a) says every corporation may issue one or more classes of stock, or one or more series within a class, and that those classes or series may have “such voting powers, full or limited, or no voting powers, and such designations, preferences and relative, participating, optional or other special rights” as stated in the certificate of incorporation. Preferred stock exists because the charter says so. It is not a different kind of ownership. It is ownership with a rider attached.

The mechanics follow from that. Under §102(a)(4) the certificate of incorporation states the total number of shares the corporation is authorized to issue, how many are in each class, and the par value of each — or that they have no par value. Creating a new series of preferred therefore means amending the certificate under §242, which requires board and stockholder action. That is why a financing round is not just a wire: it is a charter amendment. /equity/authorized-vs-outstanding-shares covers what those authorized numbers mean, and /equity/par-value covers why the par figure is almost always tiny and almost never economically interesting.

So the honest answer to “what is preferred stock” is: read the charter. Everything below is the list of rights that charters usually contain, and what each one does to the money.

Common stock vs preferred stock, side by side

The liquidation preference, and the arithmetic

Start with the payout order, because it is easy to get backwards. The SEC’s investor education material puts it directly: if a company goes bankrupt and its assets are liquidated, common stockholders are last in line to share in the proceeds — the company’s bondholders are paid first, then holders of preferred stock, and a common stockholder gets whatever is left, which may be nothing. Preferred sits above common. It does not sit above the creditors.

A liquidation preference is the amount the preferred is entitled to receive out of an exit before common receives anything. A “1×” preference means one times the amount invested. Two variants matter, and the difference between them is worth real money:

• Non-participating: the holder either takes the preference, or converts to common and takes their percentage. Not both. A rational holder takes whichever is larger.
• Participating: the holder takes the preference first, and then also shares in the remainder alongside the common, pro rata.

Here is an illustrative company. Series A investors bought 2,000,000 shares of preferred for $10,000,000, with a 1× non-participating preference, convertible one-for-one into common. Common stock and options total 8,000,000 shares. Fully diluted the company has 10,000,000 shares, of which the Series A is 20.0%. Now sell the company for $30,000,000.

Take the preference and the Series A receives $10,000,000, leaving $20,000,000 to split across the 8,000,000 common shares — $2.50 per common share. Convert instead, and the Series A holds 20.0% of 10,000,000 shares, so 20.0% of $30,000,000, which is $6,000,000. Ten million beats six million, so the holder takes the preference. That is the whole decision.

The middle row is the one to sit with. Conversion is an option, not an obligation, so the preferred takes it only when it pays better. The two paths are equal when 20.0% of the exit equals $10,000,000 — that is, at a $50,000,000 exit. Below that the preference wins and the common absorbs the difference. Above it the preferred converts and gives up the preference: check at $60,000,000, where 20.0% is $12,000,000, comfortably better than the $10,000,000 preference. Every non-participating preference has a breakeven like this, and it is arithmetic, not judgement.

Now change one word. Keep everything else identical, but make the Series A 1× participating, and sell for $30,000,000 again. The Series A takes its $10,000,000 preference first. Then it also shares the remaining $20,000,000 pro rata across all 10,000,000 shares — 2,000,000 ÷ 10,000,000 = 20.0%, a further $4,000,000. Series A total: $14,000,000. Common total: $16,000,000 across 8,000,000 shares, or $2.00 per share.

Voting and control: the vote is not the point

The SEC notes that most stocks provide voting rights, giving shareholders a proportional say in certain corporate decisions such as the election of directors. In a startup, preferred normally votes together with the common on ordinary matters, counted on an as-converted basis — 2,000,000 shares of preferred convertible one-for-one cast 2,000,000 votes. So on a plain headcount the preferred often does not control anything.

The control lives elsewhere. Protective provisions are a list, written into the charter, of things the company cannot do without the separate consent of the preferred voting as its own class: issuing a new senior series, changing the size of the board, taking on debt above a threshold, amending the charter, selling the company. Day to day, that list matters far more than the vote count, because it does not need a majority of all stockholders — it needs the preferred to say yes. A founder who holds a clear voting majority and still cannot sell the company without investor consent has met their protective provisions. /equity/share-classes goes through how multiple classes and series stack up alongside each other.

Why employees get common stock

Employee grants are almost always common stock — options over common, or RSUs that settle into common. Read next to the comparison table above, that can look like a demotion. It is not, and the reason is the price.

26 U.S.C. §409A is the reason a company obtains an independent valuation of its common stock before setting option strike prices. Because the preferred carries a liquidation preference and other rights the common does not, the common is generally valued below the most recent preferred price. How far below is company-specific — it depends on the size of the preference stack, the stage, the volatility and the appraiser’s method, and any page that quotes you a single “typical” discount is quoting a number it cannot know. What matters is the mechanism: the gap exists because the rights differ, and that gap is what makes a low strike price defensible.

Which produces the actual employee bargain. Common is the residual claim, so it is worth nothing until the preference stack is cleared — and above that line it captures the upside without sharing it with a preference. It is cheap to buy for exactly that reason. /equity/option-pool covers where employee shares come from and how the pool changes the denominator, and /equity/par-value covers the other, much smaller number printed on the certificate.

The other preferred stock: exchange-traded shares

If you came here from a brokerage screen rather than a term sheet, this is your section. Preferred shares issued by public companies — banks, insurers, utilities, REITs — are bought as income instruments. They typically pay a fixed dividend, typically carry no voting rights, and are generally callable, meaning the issuer can redeem them on stated terms. They sit in the same structural position as startup preferred: above common, below debt. The SEC’s liquidation ordering applies identically — bondholders, then preferred, then common.

That shared position is most of what the two instruments have in common. Exchange-traded preferred is not designed to convert, is not negotiated with the issuer, and carries no protective vetoes or board seats. Startup preferred is negotiated line by line, expects to convert, and is bought for control rather than yield.

What happens to preferred stock at an IPO

Most readers do not know this, and it reframes everything above: at a qualifying IPO, startup preferred normally converts into common automatically, class-wide, under the terms already written into the charter. The preference stack ends. The protective provisions fall away with the series they attached to. Investors, founders and employees all end up holding the same instrument, and from that point the difference between them is share count and lockup, not rights.

That is why the apparatus reads as downside protection rather than a permanent hierarchy. The preference binds hardest in the outcomes nobody is hoping for — a sale below the money raised, a wind-down, a hard down round. In the outcome everyone is aiming at, it deletes itself.