Congress Asset Management Co. lifted its stake in shares of Oceaneering International by 3.1% in the 1st quarter. Congress Asset Management Co. now owns 1,790,545 shares of the oil and gas company's stock valued at $39,052,000 after purchasing an additional 54,238 shares during the period. Charles Schwab Investment Management Inc. lifted its stake in shares of Oceaneering International by 2.5% in the 1st quarter. Charles Schwab Investment Management Inc. now owns 1,331,297 shares of the oil and gas company's stock valued at $29,036,000 after purchasing an additional 32,639 shares during the period. Finally, Northern Trust Corp boosted its position in shares of Oceaneering International by 19.4% during the 4th quarter. Northern Trust Corp now owns 1,230,886 shares of the oil and gas company's stock valued at $32,102,000 after purchasing an additional 200,183 shares in the last quarter. Institutional investors own 93.93% of the company's stock.