EPS TTM stands for earnings per share, trailing twelve months. It tells you how much profit a company earned for each share of its common stock over the most recent four quarters combined. Because the window rolls forward each time a new quarterly report comes out, the figure always reflects the freshest full year of actual results rather than a single quarter or a forecast.
What the Number Measures
Earnings per share begins with a company’s net profit, subtracts any dividends owed to preferred shareholders, and divides what’s left by the number of common shares outstanding. The result is the slice of the company’s bottom line that belongs, on paper, to each share.
A single quarter’s EPS can swing hard. A retailer earns most of its profit during the holidays. A construction firm bills unevenly across seasons. Judging either on one quarter would mislead you. Adding four quarters together captures a full cycle of highs and lows and gives you a steadier read.
The “trailing” part is what keeps the figure current. When a company files its latest quarterly report, the oldest quarter in the calculation drops off and the newest one takes its place. You see the most recent complete year of performance without waiting for the official annual report.
How to Calculate EPS TTM
Add up net income from the four most recent quarters, subtract preferred dividends owed over that year, and divide by the weighted average number of common shares outstanding across the same period.
Say a company reported net income of $120 million, $95 million, $110 million, and $130 million in its last four quarters, and it owes $5 million in preferred dividends. Earnings available to common shareholders total $450 million. If the weighted average share count was 100 million, EPS TTM equals $4.50.
The share count is weighted rather than taken from a single date because share counts change through buybacks, new issuances, and stock options being exercised. Weighting by time gives you an average that reflects how many shares were actually outstanding through the year.
The underlying figures come from a company’s SEC filings. Public companies file a Form 10-Q after each of their first three fiscal quarters; the fourth quarter is covered by the annual Form 10-K.1U.S. Securities and Exchange Commission. Form 10-Q General Instructions To assemble a trailing year by hand, you pull data from the three most recent 10-Qs plus the latest 10-K. Financial platforms do this automatically, but knowing the mechanics lets you check their work.
Basic vs. Diluted
Companies report two versions of EPS. Basic EPS uses only the shares currently outstanding. Diluted EPS asks a tougher question: what would per-share earnings look like if every stock option, warrant, and convertible bond turned into common stock?
Diluted matters because many companies sit on large pools of unexercised employee options and convertible debt. If those instruments all converted, the share count would jump and each existing share’s slice of earnings would shrink. Diluted EPS shows that scenario.2U.S. Securities and Exchange Commission. Earnings Per Share
When a financial platform shows EPS TTM without labeling it, the number is often diluted. Check. A mature company with few options outstanding will show a trivial gap between basic and diluted. A tech firm that pays employees heavily in stock can show a wide one, and that gap is a warning that future dilution could eat into your per-share returns.
GAAP vs. Adjusted
The EPS pulled straight from audited financial statements follows Generally Accepted Accounting Principles. That is the official number. Many companies also publish an adjusted, non-GAAP EPS that strips out costs they call one-time or non-operational, such as restructuring charges, lawsuit settlements, and asset write-downs.
Sometimes the adjustment is fair. A company that wrote down a failed acquisition genuinely did not lose that money in its ongoing business. Other times, the same “one-time” restructuring charge shows up year after year, and the adjusted figure starts looking suspiciously flattering.
SEC rules require that when a company presents a non-GAAP measure, it also show the closest comparable GAAP figure alongside it with a clear reconciliation between the two.3Securities and Exchange Commission. Conditions for Use of Non-GAAP Financial Measures When you compare EPS TTM across companies, make sure you are comparing the same version. Mixing one company’s GAAP EPS with another’s adjusted figure produces a false picture.
Using EPS TTM to Value a Stock
The most common use is as the denominator of the trailing price-to-earnings ratio. Divide the current stock price by EPS TTM and you get trailing P/E. If a stock trades at $90 and EPS TTM is $6, trailing P/E is 15, meaning investors are paying $15 for every dollar of the last year’s earnings.
That ratio becomes useful in comparison. A software company trading at 35 times trailing earnings while its peers trade at 25 either has stronger growth ahead or is overpriced. Trailing P/E gives you the starting point for that question, not the answer.
Tracking a single company’s EPS TTM across several quarters also reveals its earnings trajectory. A steadily rising figure means the business is growing its per-share profits. A declining one means earnings power is shrinking, which tends to drag the stock down eventually. The TTM view is more reliable for trend-spotting than raw quarterly numbers because a single unusually good or bad quarter fades quickly.
Where EPS TTM Can Mislead You
Buybacks Can Inflate the Number
Share repurchases are one of the most common ways EPS TTM rises without the business actually earning more. When a company buys back its own stock, the share count shrinks and EPS rises mechanically. A company earning $10 billion on one billion shares has an EPS of $10. Buy back 5% of the shares and the same $10 billion produces roughly $10.53. Nothing about the business changed.
Compare the company’s net income growth against its EPS growth. If net income is flat but EPS keeps climbing, buybacks are doing the work.
Negative EPS Breaks the P/E Ratio
If EPS TTM is negative, trailing P/E is meaningless. A negative P/E tells you nothing about whether the stock is cheap. Most platforms display “N/A” instead. Growth-stage companies that are not yet profitable and cyclical firms in a downturn often produce negative trailing EPS. When you cannot lean on trailing P/E, shift to revenue growth, free cash flow, or the price-to-sales ratio. Forward P/E, which uses projected earnings, is another option, though it carries the uncertainty of any forecast.
Some Industries Don’t Fit
EPS works best when net income tracks the cash a business actually generates. Capital-heavy industries like telecommunications, utilities, and oil exploration book large depreciation and amortization charges that push net income well below cash flow. In those sectors, analysts often use EBITDA or the EV/EBITDA multiple alongside or instead of EPS.
Banks and insurance companies bring a different problem. Their earnings include items like loan loss provisions and investment gains that do not translate cleanly to industrial-company performance. Comparing a bank’s EPS TTM directly to a manufacturer’s rarely produces a useful conclusion.
It’s a Rearview Mirror
EPS TTM tells you what happened, not what happens next. A company can post strong trailing earnings the quarter before losing a major customer, facing patent expiration, or hitting a regulatory wall. By the time those events show up in the trailing figure, the stock has usually moved. Pair the trailing number with forward-looking inputs like management guidance and analyst estimates. The historical figure grounds you in reality; the forward view tells you where the market thinks the story is going.
Where to Find EPS TTM
You rarely need to calculate it yourself. Brokerage platforms, Yahoo Finance, Google Finance, Bloomberg terminals, and most stock screeners display trailing twelve months EPS on a stock’s summary page. The figure refreshes after each new quarterly filing.
Platforms occasionally lag after a filing, and one platform may show GAAP EPS while a company’s investor relations page highlights the adjusted figure. If a number looks surprisingly high or low, pull the last four quarterly filings from the SEC’s EDGAR database and verify it against the income statements yourself.4Investor.gov. How to Read a 10-K/10-Q
One habit is worth building. Whenever you look at EPS TTM, check whether the figure is basic or diluted, whether it is GAAP or adjusted, and how per-share growth compares to total net income growth. Those three checks catch most of the ways the headline number can lead you the wrong direction.