Corporate Governance Board of Directors Management Team Sustainability Financials Quarterly Results SEC Filings Non-GAAP Financials Stock Senior Notes Common Stock Warrants Tax Documents Dividends Press Releases Events and Presentations Annual Meeting & Proxy Company Reports Annual Reports Sustainability Reports Climate-Related Analysis Reports Contact SEC Filings Home / Investors / Financials / SEC Filings NASDAQ: CHKOTCPK: CHKAQYearTrailing 12-MonthsCalendar Year 2024Calendar Year 2023Calendar Year 2022Calendar Year 2021Calendar Year 2020Calendar Year 2019Calendar Year 2018Calendar Year 2017Calendar Year 2016Calendar Year 2015Calendar Year 2014Calendar Year 2013Calendar Year 2012Calendar Year 2011Calendar Year 2010Calendar Year 2009Calendar Year 2008Calendar Year 2007Calendar Year 2006Calendar Year 2005Calendar Year 2004Calendar Year 2003Calendar Year 2002Calendar Year 2001Calendar Year 2000Calendar Year 1999Calendar Year 1998Calendar Year 1997Calendar Year 1996Calendar Year 1995ViewAll FilingsAnnual FilingsQuarterly FilingsCurrent FilingsRegistration StatementsSection 16Mergers & AcquisitionsProxy & Information StatementsOtherFormDescriptionDateFormat25-NSENotification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securitiesSep 26, 2014Open Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities in HTML.Open Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities in DOC file.Open Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities in PDF file.Open Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities in XLS file.CERTNYSCertification by the New York Stock Exchange approving securities for listingMay 30, 2014Open Certification by the New York Stock Exchange approving securities for listing in HTML.Open Certification by the New York Stock Exchange approving securities for listing in DOC file.Open Certification by the New York Stock Exchange approving securities for listing in PDF file.Open Certification by the New York Stock Exchange approving securities for listing in XLS file.305B2Initial statement filed pursuant to the Trust Indenture ActApr 10, 2014Open Initial statement filed pursuant to the Trust Indenture Act in HTML.Open Initial statement filed pursuant to the Trust Indenture Act in DOC file.Open Initial statement filed pursuant to the Trust Indenture Act in PDF file.Open Initial statement filed pursuant to the Trust Indenture Act in XLS file.POSASRPost-effective Amendment to an automatic shelf registration statement on Form S-3ASR or Form F-3ASRApr 10, 2014Open Post-effective Amendment to an automatic shelf registration statement on Form S-3ASR or Form F-3ASR in HTML.Open Post-effective Amendment to an automatic shelf registration statement on Form S-3ASR or Form F-3ASR in DOC file.Open Post-effective Amendment to an automatic shelf registration statement on Form S-3ASR or Form F-3ASR in PDF file.Open Post-effective Amendment to an automatic shelf registration statement on Form S-3ASR or Form F-3ASR in XLS file.FWPFree Writing ProspectusApr 10, 2014Open Free Writing Prospectus in HTML.Open Free Writing Prospectus in DOC file.Open Free Writing Prospectus in PDF file.Open Free Writing Prospectus in XLS file.UPLOADCorrespondence from the SEC to the FilerFeb 26, 2014Open Correspondence from the SEC to the Filer in HTML.Open Correspondence from the SEC to the Filer in DOC file.Open Correspondence from the SEC to the Filer in PDF file.Open Correspondence from the SEC to the Filer in XLS file.SC 13GSchedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutionsFeb 13, 2014Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in HTML.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in DOC file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in PDF file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in XLS file.SC 13G/AAmendment to a previously filed SC 13GFeb 10, 2014Open Amendment to a previously filed SC 13G in HTML.Open Amendment to a previously filed SC 13G in DOC file.Open Amendment to a previously filed SC 13G in PDF file.Open Amendment to a previously filed SC 13G in XLS file.
