Corporate Governance Board of Directors Management Team Sustainability Financials Quarterly Results SEC Filings Stock Senior Notes Common Stock Warrants Tax Documents Dividends Press Releases Events and Presentations Company Reports Annual Reports Sustainability Reports Climate-Related Analysis Reports Contact SEC Filings Home / Investors / Financials / SEC Filings NASDAQ: CHKOTCPK: CHKAQYearTrailing 12-MonthsCalendar 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 StatementsOtherFormDescriptionDateFormatSC TO-I/AAmendment to a previously filed SC TO-IOct 11, 2022Open Amendment to a previously filed SC TO-I in HTML.Open Amendment to a previously filed SC TO-I in DOC file.Open Amendment to a previously filed SC TO-I in PDF file.Open Amendment to a previously filed SC TO-I in XLS file.S-4/APre-effective amendment to an S-4 filingSep 12, 2022Open Pre-effective amendment to an S-4 filing in HTML.Open Pre-effective amendment to an S-4 filing in DOC file.Open Pre-effective amendment to an S-4 filing in PDF file.Open Pre-effective amendment to an S-4 filing in XLS file.Open Pre-effective amendment to an S-4 filing in XBLR Viewer.Open Pre-effective amendment to an S-4 filing in XBLR file.SC TO-I/AAmendment to a previously filed SC TO-ISep 12, 2022Open Amendment to a previously filed SC TO-I in HTML.Open Amendment to a previously filed SC TO-I in DOC file.Open Amendment to a previously filed SC TO-I in PDF file.Open Amendment to a previously filed SC TO-I in XLS file.Open Amendment to a previously filed SC TO-I in XBLR Viewer.Open Amendment to a previously filed SC TO-I in XBLR file.S-4/APre-effective amendment to an S-4 filingAug 31, 2022Open Pre-effective amendment to an S-4 filing in HTML.Open Pre-effective amendment to an S-4 filing in DOC file.Open Pre-effective amendment to an S-4 filing in PDF file.Open Pre-effective amendment to an S-4 filing in XLS file.SC TO-I/AAmendment to a previously filed SC TO-IAug 31, 2022Open Amendment to a previously filed SC TO-I in HTML.Open Amendment to a previously filed SC TO-I in DOC file.Open Amendment to a previously filed SC TO-I in PDF file.Open Amendment to a previously filed SC TO-I in XLS file.SC TO-ITender offer schedule and amendment filed by the issuer.Aug 18, 2022Open Tender offer schedule and amendment filed by the issuer. in HTML.Open Tender offer schedule and amendment filed by the issuer. in DOC file.Open Tender offer schedule and amendment filed by the issuer. in PDF file.Open Tender offer schedule and amendment filed by the issuer. in XLS file.
