EXHIBIT 11 WASHINGTON GAS LIGHT COMPANY AND SUBSIDIARIES Computation of Earnings per Average Share of Common Stock Assuming Full Dilution from Conversion of the $4.60 and $4.36 Convertible Preferred Series ------------------------------------------------------------- (Unaudited) Three Months Ended Nine Months Ended -------------------- ------------------- June 30, June 30, June 30, June 30, 1997 1996 1997 1996 -------- -------- -------- -------- (Thousands, Except Per Share Data) Net income (loss) $ (365) $ (5,421) $ 96,203 $ 99,828 Dividends on preferred stock (excluding dividends on convertible preferred stock) 330 330 990 990 -------- -------- -------- -------- Net income (loss) applicable to common stock $ (695) $ (5,751) $ 95,213 $ 98,838 ======== ======== ======== ======== Average common shares outstanding on a fully diluted basis assuming conversion of the outstanding shares of the $4.60 and $4.36 convertible preferred stock as of the beginning of each period based on the applicable conversion price 43,731 43,502 43,735 43,303 ======== ======== ======== ======== Earnings (loss) per average share of common stock assuming full dilution $ (0.02) $ (0.13) $ 2.18 $ 2.28 ======== ======== ======== ======== - ------------------------------------------ Note: These calculations are submitted in accordance with Securities Exchange Act of 1934 Release No. 9083 although not required by footnote 2 to paragraph 14 of Accounting Principles Board Opinion No. 15 because no dilution results.