b'KOSMOS ENERGY LTD.Notes to Consolidated Financial Statements (Continued)13. Income Taxes (Continued)The Company will file a 2018 U.S. federal income tax return during 2019. A subsidiary of theCompany is open to U.S. federal income tax examinations for tax years 2015 through 2017 and to Texasmargin tax examinations for the tax years 2014 through 2017. In addition to the United States, theCompany files income tax returns in the countries in which we operate. The Company is open toincome tax examinations for years 2014 through 2017 in its significant other foreign jurisdictions,primarily Ghana.As of December 31, 2018, the Company had no material uncertain tax positions. The Companyspolicy is to recognize potential interest and penalties related to income tax matters in income taxexpense.14. Net Income (Loss) Per ShareIn the calculation of basic net income per share, participating securities are allocated earningsbased on actual dividend distributions received plus a proportionate share of undistributed net income,if any. We calculate basic net income per share under the two-class method. Diluted net income (loss)per share is calculated under both the two-class method and the treasury stock method and the moredilutive of the two calculations is presented. The computation of diluted net income (loss) per sharereflects the potential dilution that could occur if all outstanding awards under our LTIP were convertedinto shares of common stock or resulted in the issuance of shares of common stock that would thenshare in the earnings of the Company. During periods in which the Company realizes a loss fromcontinuing operations securities would not be dilutive to net loss per share and conversion into sharesof common stock is assumed not to occur.Basic net income (loss) per share is computed as (i) net income (loss), (ii) less income allocable toparticipating securities (iii) divided by weighted average basic shares outstanding. The Companysdiluted net income (loss) per share is computed as (i) basic net income (loss), (ii) plus dilutedadjustments to income allocable to participating securities (iii) divided by weighted average dilutedshares outstanding.Years Ended December 31,2018 2017 2016(In thousands, except per share data)Numerator:Net loss allocable to common stockholders(1) . $(93,991) $(222,792) $(283,780)Denominator:Weighted average number of shares outstanding:Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404,585 388,375 385,402Restricted stock awards and units(1)(2) . . . . . . Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404,585 388,375 385,402Net loss per share:Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ (0.23) $ (0.57) $ (0.74)Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ (0.23) $ (0.57) $ (0.74)(1) Our service vesting restricted stock awards represent participating securities because theyparticipate in non-forfeitable dividends with common equity owners. Income allocable to144'