KOSMOS ENERGY LTD. Notes to Consolidated Financial Statements (Continued) 14. Net Income (Loss) Per Share (Continued) adjustments to income allocable to participating securities (iii) divided by weighted average diluted shares outstanding. Years Ended December 31, 2017 2016 2015 (In thousands, except per share data) Numerator: Net loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $(222,792) $(283,780) $(69,836) Basic income allocable to participating securities(1) . . . . . . . . . . . . . . . . . . . . . . . . — — — Basic net loss allocable to common shareholders . . . . . . . . . . . . . . . . . . . . . . . . (222,792) (283,780) (69,836) Diluted adjustments to income allocable to participating securities(1) . . . . . . . . . . . . . . . — — — Diluted net loss allocable to common shareholders . . . . . . . . . . . . . . . . . . . . . . . . $(222,792) $(283,780) $(69,836) Denominator: Weighted average number of shares outstanding: Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388,375 385,402 382,610 Restricted stock awards and units(1)(2) . . . . . . — — — Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388,375 385,402 382,610 Net loss per share: Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ (0.57) $ (0.74) $ (0.18) Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ (0.57) $ (0.74) $ (0.18) (1) Our service vesting restricted stock awards represent participating securities because they participate in non-forfeitable dividends with common equity owners. Income allocable to participating securities represents the distributed and undistributed earnings attributable to the participating securities. Our restricted stock awards with market and service vesting criteria and all restricted stock units are not considered to be participating securities and, therefore, are excluded from the basic net income (loss) per common share calculation. Our service vesting restricted stock awards do not participate in undistributed net losses because they are not contractually obligated to do so and, therefore, are excluded from the basic net income (loss) per common share calculation in periods we are in a net loss position. (2) For the years ended December 31, 2017, 2016 and 2015, we excluded 12.9 million, 11.8 million and 11.2 million outstanding restricted stock awards and restricted stock units, respectively, from the computations of diluted net income per share because the effect would have been anti-dilutive. 145