Authorized, issued, and outstanding shares measure three different things. Understanding how each works is important for calculating actual company ownership, especially for founders and early employees. Authorized shares are the ceiling set in a company’s certificate of incorporation. Issued shares are the portion of that ceiling that is granted to founders, employees, and investors. Outstanding shares are the issued shares actively held by shareholders.

Below, we’ll cover how different shares move independently during fundraising, why founders typically authorize more shares than they plan to issue right away, and how to read the gap between issued and outstanding shares on a cap table.

Key takeaways

• Authorized shares represent capacity set at incorporation, not actual ownership or dilution.

• Outstanding shares are the number used to calculate real ownership percentages.

• Dilution during fundraising typically comes from a growing share count, not from anyone losing shares they already hold.

What are authorized vs. issued shares?

Authorized shares are the total number of shares a corporation’s certificate of incorporation allows it to issue. This number gets set at incorporation and can only change through a formal amendment filed with the state, which requires board approval and a shareholder vote.

Issued shares are the portion of authorized shares that have actually gone to someone, such as founders at incorporation, employees through equity grants, investors in a priced round, or anyone who’s exercised stock options.

What is issued vs. outstanding stock?

Outstanding stock (or outstanding shares) are the shares currently held by all shareholders, excluding any shares the company has repurchased and holds in its treasury. Outstanding share counts are used to calculate ownership percentages and dilution.

Issued shares encompass all the shares ever allocated or sold, including those the company has repurchased.

What are the differences between authorized, issued, and outstanding shares?

Authorized, issued, and outstanding share counts each answer a different question. They nest inside each other: outstanding shares are always less than or equal to issued shares, and issued shares are always less than or equal to authorized shares.

Here’s how that plays out for a hypothetical startup at a single point in time:

Authorized minus issued leaves you the unissued authorized shares still in reserve. Issued minus any treasury shares gives you the number of outstanding shares. Therefore, this startup’s 8,200,000 issued shares minus its 200,000 treasury shares land at 8,000,000 outstanding shares.

How do share counts change during fundraising and dilution?

Every funding round touches all three numbers, usually in a set order.

Option pool expansion happens first, before the round closes. This increases issued shares and dilutes existing holders before the new money arrives. A “pre-money option pool” is a common negotiating point between founders and investors for exactly this reason: founders absorb that dilution alone rather than splitting it with the incoming investor.

Next, new shares get issued to investors in exchange for their capital at closing. If the authorized count doesn’t leave enough room for that issuance, the company amends its charter first, sometimes on the same day as the closing. Once that happens, outstanding shares rise, and existing holders get diluted by the larger denominator.

Say the company we looked at in our previous example had 8,000,000 shares outstanding before a round and issued 2,000,000 new shares to a Series A investor. Outstanding shares would climb to 10,000,000, and a founder who held 3,000,000 shares, or 37.5% of the pre-round total, would now own 30%. Dilution is often about the total pool growing around a fixed number someone already holds.

This is also where authorized shares can become a bottleneck. A company that authorized 10,000,000 shares at incorporation, and has already issued 9,500,000, has very little room left. Running that process in parallel with round negotiations is common, but it adds an extra step.

What do these share categories mean for founders?

At incorporation, authorizing too few shares means an early amendment is likely, which costs filing fees and requires board and shareholder approval right when the company should be focused on other things. Authorizing a number such as 10,000,000 gives more room, which is part of why many services default new incorporations to that figure.

Option pool size is a similarly consequential decision, and it usually gets negotiated as a percentage of the fully diluted share count rather than a flat number. A founder’s share can become diluted because pre-money pool expansions typically come out of the founders’ side of the table.

Reading a cap table comes down to tracking these three numbers correctly. Authorized and unissued shares show how much room is left, and whether the next round or option grant can happen without a charter amendment. Looking at issued shares shows who actually holds shares today, giving you the real distribution across founders, employees, and investors. Outstanding vs. fully diluted shares show what ownership looks like now versus later. The gap between these two numbers grows as the option pool grows, and it’s often what people miss when they eyeball a percentage.

Those three answers determine actual ownership, voting power, and how much room the company has to grant equity or raise funds again without touching its certificate of incorporation.

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