A company can grow revenue every year, grow profit every year, and still leave its shareholders with less than they started with. The mechanism is share count, and it is the most consequential number that never appears in a headline.
You own a fraction, not a company
Owning a share means owning a fraction of the business. If total profit rises 20% but the number of shares rises 25%, your slice of the profit shrank. Every per-share number — earnings per share, book value per share, the dividend — depends on a denominator most people never check.
This is why we measure growth on a per-share basis wherever it makes sense. A company that doubles revenue by issuing stock to buy other companies has not necessarily made its owners any richer, and the headline growth rate cannot tell the two cases apart.
Where dilution comes from
- Stock-based compensation — the most common source by far. Employees are paid in shares, and those shares come out of your ownership.
- Acquisitions paid in stock — the company buys something and issues new shares to fund it.
- Convertible debt — borrowing that turns into equity later, often at a price that looks fine when issued and painful when converted.
- Secondary offerings — issuing new shares for cash, which is the honest and visible version.
Stock compensation deserves particular attention because of how it interacts with cash flow. It reduces reported profit but not cash, so it makes free cash flow look strong relative to earnings. The cost is real; it is just paid in your ownership rather than the company's bank account.
The buyback question
Companies often buy back shares to offset this, and the two frequently cancel out — a company issues 2% to employees and repurchases 2%, and the count holds flat. That is not the same as a genuine return of capital. It is treading water, funded with real cash.
Buybacks can also be overdone. When repurchases are aggressive enough and funded with debt, book equity shrinks, which flatters every return-on-capital measure and eventually produces the strange price-to-book readings you see at some very high-quality companies. Visa against Mastercard is a live example of exactly that effect.
How to check it in a minute
Pull up the diluted share count for the last five years and look at the direction. That is the whole exercise. Three cases:
- Falling steadily — genuine buybacks. Your slice is growing.
- Flat — buybacks are offsetting compensation. Neutral, but the cash is being spent.
- Rising every year — you are being diluted. Any per-share growth is happening despite this, and headline revenue growth overstates what reached you.
The bottom line
Growth in the business and growth in your claim on it are different things, and share count is what separates them. A company issuing 5% of itself a year needs to grow 5% before its owners are level.
Check the direction of the share count before you get attached to a growth rate. It takes a minute, it is available for every listed company, and it occasionally reverses the entire conclusion you were about to reach.