In response to an inquiry on the Business Librarians listserv today asking for help in locating 20F filings (the annual filing made with the SEC) by non-US oil and gas companies, I was reminded that the NYSE has a listing of the non-US companies and one may select different industry sectors at : http://www.nyse.com/about/listed/lc_ny_industry_1.html?ListedComp=NONUS. The companies’ hyperlinks include a tab for SEC filings, as well as the companies’ homepages, which would have links to the filings. (Canadian companies may file a 40-F, rather than a 20-F).
The other exchanges could be searched for other listed companies.
Audit Analytics offers a choice to search for US, Canadian and foreign companies that could be used to identify the companies and the oil and gas industry may be divided into those involved in wells and drilling, extraction, and support activities. There would be links to the filings available.
Edgar Online I-Metrix enables one to search by industry, SEC form number, and by listed exchange. (The initial inquirer didn’t have access to those databases.)