Operating Income per Share

Category

Ratios

Units

Currency per share

Formula

Operating Income / Shares Outstanding

Source

Calculated by GeminIQ from figures reported in SEC filings

Operating income per share is a company's operating income divided by its number of common shares outstanding. It shows how much profit the core business produced for each share before interest, income taxes, and non-operating gains and losses.

Because it stops above interest and tax, it lets investors compare the operating performance of companies with different capital structures and tax positions on a per-share basis.

The ratio is calculated from figures reported in SEC filings. Operating income is typically tagged OperatingIncomeLoss in XBRL and is revenue minus cost of revenue and operating expenses such as selling, general and administrative costs and research and development. Regulation S-X Rule 5-03 does not prescribe an operating income subtotal, so companies decide whether to present one and which items sit above it. The share count may be weighted-average or period-end, depending on the source.

That flexibility is the main pitfall. Some companies include restructuring charges, impairments, or gains on asset sales in operating income, while others show them below it. Some filers, including many banks and insurers, present no operating income line at all. Operating income is not the same as EBIT in every case: EBIT is often built from net income by adding back interest and taxes, which pulls non-operating items back in. Share buybacks raise the per-share figure without any change in the underlying business.

Analysts use operating income per share to track the growth of the core business per share over time, separate from changes in leverage or tax rates that affect EPS. Comparing its growth with EPS growth shows whether earnings gains came from operations or from financing and tax effects. It is not a GAAP per-share measure, and companies rarely report it themselves.