American consulting shops like McKinsey & Co., BCG, Teneo, and M. Klein & Co. are helping Saudi Arabia diversify its oil-dependent economy through its lucrative Public Investment Fund. This story is available exclusively to Business Insider subscribers. Saudi Arabia, though, has imposed strict rules on what information the American consulting companies can share with the US government, and that's irked some American lawmakers. AdvertisementSo much so that Congress forced the heads of McKinsey, BCG, Teneo, and M. Klein & Co. to testify this week about their failure to comply with subpoenas regarding their firms' work with Saudi Arabia . BCG, Teneo, and M. Klein & Co. did not respond to a request for comment from Business Insider.

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Persons: —, Cristiano Ronaldo, Sen, Richard Blumenthal, Bob Sternfels, Rich Lesser, Blumenthal, Michael Klein Organizations: Service, McKinsey & Co, Klein, Co, Public Investment Fund, Business, Saudi, Al, McKinsey, Investigations Locations: Saudi Arabia, United States, Saudi