Disclosure of non-financial information, especially regarding corporate governance (CG), is an important element of companies’ communication with their stakeholders. This paper sets out to define—from a theoretical and practical perspective—the scope of CG reporting in Polish fuel, gas, and energy (“energy”) companies required under EU directives and national regulations. The paper presents the results of a study investigating whether and to what extent annual corporate governance statements (CGSs) prepared by energy companies, compared with other companies listed on the Warsaw Stock Exchange (WSE-LCs), are consistent with “Best Practices for WSE-LCs 2016” (BPs for WSE-LCs). The study group consisted of energy companies submitting their 2017−2020 reports, as well as other companies listed on the WSE, as a comparative group (i.e., a total of 179 reports). We used a monographic method to study theoretical problems and annual CGSs and performed a critical review of the literature, as well as comparative, content, and descriptive analyses. The analysed CGSs helped answer the following question: to what extent do energy companies and other WSE-LCs pursue the CG rules specified in BPs for WSE-LCs? The results indicate that such companies follow various approaches to CG disclosures and reporting obligations. However, what truly matters is not the legal obligation itself, but rather the companies’ social responsibility for maintaining good relations with their stakeholders. The paper will contribute to CG studies, because no Polish theorist has so far analysed CG disclosures in annual non-financial reports. The paper fills a research gap in information on adherence to best practices in CG disclosures in CGSs of all WSE-LCs. The study presents conclusions of CG disclosures by energy companies, which can provide the basis for further research in other sectors.