EPS TTM is a company’s earnings per share added up across its trailing twelve months, meaning the four most recently reported quarters. It tells you how much of the company’s net profit belongs, on paper, to each common share over the freshest full year of results. Because the window rolls forward every time a new quarterly report comes out, the figure always reflects a complete cycle of actual performance rather than one quarter’s snapshot or a forecast of what’s ahead.
That rolling quality is the reason EPS TTM sits near the top of almost every stock screener and brokerage summary page. A single quarter can swing hard on seasonality: a retailer looks brilliant in the holiday quarter and mediocre otherwise; a construction firm bills unevenly across the year. Rolling four quarters together smooths those swings and gives you a stable read on per-share profitability.
How to Calculate EPS TTM
The formula is simple. Take the company’s net income from the last four quarters, subtract any dividends owed to preferred shareholders, and divide by the weighted average number of common shares outstanding over the same period.
Say a company reported quarterly net income of $120 million, $95 million, $110 million, and $130 million, and owes $5 million in preferred dividends for the year. Earnings available to common shareholders come to $450 million. If the weighted average share count over those twelve months was 100 million, EPS TTM is $4.50.
The weighted average matters because share counts move mid-year through buybacks, new stock issuances, and employees exercising options. Weighting by time reflects how many shares were actually outstanding during each portion of the year, rather than snapping to a single date.
The underlying numbers come from a public company’s filings with the SEC. Companies file a Form 10-Q after each of their first three fiscal quarters; the fourth quarter is covered inside the annual Form 10-K.1U.S. Securities and Exchange Commission. Form 10-Q General Instructions To assemble a full trailing year by hand, you combine data from the three most recent 10-Qs and the latest 10-K. Financial platforms do this automatically, but knowing where the pieces come from lets you verify and spot errors.
Basic vs. Diluted EPS TTM
Companies report two versions of earnings per share. Basic EPS uses the shares currently outstanding. Diluted EPS asks what would happen if every stock option, warrant, and convertible bond turned into common stock: the share count in the denominator rises, and each share’s slice of earnings shrinks.2U.S. Securities and Exchange Commission. Earnings Per Share
When a financial platform shows EPS TTM without a label, it is often the diluted number. Check the fine print. The gap between the two can be trivial for a mature company with few outstanding options, or significant for a firm that pays employees heavily in stock. A wide spread is a signal that future dilution could eat into per-share returns.
GAAP vs. Adjusted EPS TTM
The EPS number pulled straight from a company’s audited statements follows Generally Accepted Accounting Principles, or GAAP. That is the official figure. Many companies also publish an adjusted, non-GAAP EPS that strips out costs they describe as one-time or non-operational: restructuring charges, lawsuit settlements, asset write-downs, and similar items.
Sometimes those adjustments do reveal what the core business earned. A company that took a large write-down on a failed acquisition genuinely did not lose that money in day-to-day operations. Other times, the same “one-time” charge shows up year after year, and the adjusted figure ends up looking a lot friendlier than the underlying business warrants.
SEC rules require that whenever a company presents a non-GAAP measure, it must show the closest GAAP figure alongside it with a clear reconciliation. There is also a rule against labeling a charge as non-recurring if a similar charge appeared within the prior two years or is reasonably likely within the next two.3Securities and Exchange Commission. Conditions for Use of Non-GAAP Financial Measures
When you compare EPS TTM across companies, make sure you’re comparing the same version. Mixing one company’s GAAP number with another’s adjusted figure is not a real comparison.
Using EPS TTM to Value a Stock
The most common use of EPS TTM is as the denominator of the trailing price-to-earnings ratio. Divide the stock’s current price by its EPS TTM and you get the trailing P/E. A stock at $90 with an EPS TTM of $6 has a trailing P/E of 15, meaning the market is paying $15 for every dollar of the last year’s earnings.
The ratio becomes useful in comparison. A software company trading at 35 times trailing earnings alongside peers at 25 times either has stronger growth prospects or is priced richly. The trailing P/E is a starting point for that question, not the answer.
Tracking a single company’s EPS TTM across several quarters also shows its earnings trajectory. A steadily rising figure means per-share profitability is growing. A declining one means it is shrinking, which tends to drag on the stock price over time. The trailing view is more reliable for trend-spotting than raw quarterly numbers, because one unusually good or bad quarter cannot distort the picture for long.
When Trailing EPS Turns Negative
If EPS TTM is negative, the trailing P/E stops meaning anything. A negative ratio does not tell you a stock is cheap or expensive; most platforms simply display “N/A.” Growth-stage companies that aren’t yet profitable, and cyclical firms in a downturn, regularly produce negative trailing EPS. When you can’t lean on trailing P/E, revenue growth, free cash flow, and the price-to-sales ratio can fill part of the gap.
The Buyback Effect
Share repurchases are one of the most common reasons EPS TTM rises without the business actually earning more. When a company buys back its own stock, the share count in the denominator shrinks and EPS climbs mechanically. A company earning $10 billion with one billion shares has an EPS of $10; buy back 5% of those shares and the same $10 billion produces an EPS of roughly $10.53. Nothing about the business changed.
To catch this, compare net income growth against EPS growth. If net income is flat but EPS keeps rising, buybacks are doing the work.
What EPS TTM Doesn’t Tell You
EPS TTM is backward-looking. It captures exactly what happened over the last year and says nothing about what happens next. A company can post strong trailing earnings right before losing a major customer, facing a patent expiration, or running into a regulatory problem. By the time any of that shows up in the trailing figure, the stock price has usually already moved.
That is why analysts pair trailing EPS with forward-looking information: management guidance, analyst consensus estimates, and industry trends. Neither the historical number nor the forecast is enough on its own. The trailing figure grounds you in what actually happened; the forward estimate suggests where the story is headed.
Industries Where EPS Is a Weak Yardstick
EPS works best where net income closely tracks the cash the business generates. In capital-heavy industries like telecommunications, utilities, and oil exploration, large depreciation and amortization charges can make net income look much smaller than the actual cash the business produces. Analysts in those sectors often lean on EBITDA or the EV/EBITDA multiple, which strip out accounting choices about how quickly to write off expensive equipment.
Banks and insurance firms present a different problem. Their earnings include items like loan loss provisions and investment gains that do not map cleanly to an industrial company’s operating performance. Comparing a bank’s EPS TTM to a manufacturer’s is rarely productive even after adjusting for size.
Where to Find EPS TTM and How to Sanity-Check It
You rarely need to calculate EPS TTM yourself. Brokerage platforms, Yahoo Finance, Google Finance, Bloomberg terminals, and most stock screeners display it automatically on a stock’s summary page, and the figure refreshes after each new quarterly filing.
Understanding the calculation still protects you. Platforms sometimes lag in updating after a filing, and some display GAAP EPS while a company’s investor relations page highlights an 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. The 10-Q filings contain the income statement data you need.4Investor.gov. How to Read a 10-K/10-Q
Three quick checks catch most of the ways the headline can mislead you. Look at both the basic and diluted numbers. Confirm whether the platform is showing GAAP or adjusted earnings. And compare total net income growth to per-share growth so buybacks don’t dress up a flat business as a growing one.