Invesco Ltd. now owns 8,339,939 shares of the utilities provider's stock valued at $827,489,000 after purchasing an additional 1,674,706 shares in the last quarter. Tortoise Capital Advisors L.L.C. grew its holdings in shares of ONEOK by 17.1% in the first quarter. Tortoise Capital Advisors L.L.C. now owns 7,171,795 shares of the utilities provider's stock valued at $711,586,000 after purchasing an additional 1,047,810 shares in the last quarter. Finally, Northern Trust Corp grew its holdings in shares of ONEOK by 5.3% in the first quarter. Northern Trust Corp now owns 6,879,863 shares of the utilities provider's stock valued at $682,620,000 after purchasing an additional 344,002 shares in the last quarter. 69.13% of the stock is owned by hedge funds and other institutional investors.