Corner House Research [“Corner House”] is a UK-registered non-governmental organisation. It began investigating alleged corruption surrounding the sale of the OPL 245 oil license in Nigeria in 2012. It was a signatory to the criminal complaint that triggered the current prosecutions of Shell and others in Italy and Nigeria.
web: http://www.thecornerhouse.org.uk/

Global Witness is a non-governmental organisation based in London and Washington, that investigates and campaigns to prevent natural resource related conflict and corruption, and associated environmental and human rights abuses. It has been investigating OPL 245 since 2008 and was also a signatory to the complaint that led to the Italian and Nigerian prosecutions of Shell and others.
web: https://www.globalwitness.org/en/

Human and Environmental Development Agenda (HEDA Resource Centre) (HEDA) is a Nigerian based non-governmental organisation. HEDA’s involvement in the OPL 245 began in 2013, when it submitted a petition to Nigeria’s Economic and Financial Crimes Commission (EFCC), demanding investigation of the transaction. Following the petition, an investigation was opened by the commission, culminating in recent prosecution of parties to the deal.
web: http://hedang.org/

ReCommon is an independent and not-for-profit “association of social promotion” under the Italian law. It has been investigating OPL 245 since 2013 and is also a signatory to the criminal complaint that triggered the current prosecutions of Shell and others in Italy and Nigeria.
web: https://www.recommon.org/eng/