BlackRock Increases Holding in GKP By Editor on 12th April 2019 in Investment, Iraq Banking & Finance News, Iraq Oil & Gas News By John Lee. US-based investment giant BlackRock has increased its shareholding in Gulf Keystone Petroleum (GKP) to 5 percent, up from 4.89 percent. Shares in the company have risen 35 percent since the start of the year. In 2016, GKP announced that it was in default on its debt obligations, which led to a restructuring in which bondholders took control of the company. (Source: GKP) Related posts: No related posts.