What is a stock's EPS?
Updated on August 24, 2026 · by Alex
EPS (earnings per share) is the company's net profit divided by the number of shares that exist. If a company earned 100 million and has 50 million shares, its EPS is 2: each share "generated" 2 in profit.
EPS translates a giant, incomparable figure — "the company earned 4.3 billion" — into a per-share number you can actually compare with the price you pay. It is the piece that goes on the bottom of the P/E ratio.
Its real value is in the series, not the single number. An EPS of 2 tells you nothing on its own. An EPS that went from 1.20 to 1.55 to 2.00 over three quarters tells you quite a lot.
It is the number that moves the price four times a year. Every quarter analysts publish the EPS they expect, and when the company reports the real one it gets compared against that expectation. The difference is called the EPS surprise.
Here is the part that confuses almost everyone: what moves the price is not whether the company earned a lot, but whether it earned more or less than expected. A company can report record profits and fall 8% on the day, because the market was expecting an even bigger record. Today's price already has baked into it what people think is going to happen; it only reacts to what wasn't in the script.
Comparing the EPS of two different companies. It means nothing: it depends on how many shares each one has, which is an administrative decision. A company that does a split and doubles its share count cuts its EPS in half without having changed anything about its business.
The second mistake is not telling adjusted EPS apart from GAAP EPS. The adjusted one excludes items the company considers one-off, and it is the company that decides what counts as one-off. It almost always looks better than the accounting number. When the gap between the two is large and repeats quarter after quarter, that gap is itself the information.
