Seacor Holdings Inc. (NYSE:CKH) saw unusually-strong trading volume on Tuesday . Approximately 232,580 shares were traded during trading, an increase of 70% from the previous session’s volume of 137,102 shares.The stock last traded at $54.73 and had previously closed at $55.24.

The company’s market cap is $948.71 million. The stock’s 50-day moving average is $57.21 and its 200 day moving average is $53.42.

In other news, Director Robert Christopher Regan sold 3,866 shares of the firm’s stock in a transaction that occurred on Thursday, May 12th. The shares were sold at an average price of $53.93, for a total transaction of $208,493.38. Following the transaction, the director now directly owns 5,098 shares in the company, valued at $274,935.14. The sale was disclosed in a legal filing with the SEC, which is accessible through this hyperlink.

Several institutional investors have made changes to their positions in the company. California State Teachers Retirement System raised its position in shares of Seacor Holdings by 1.9% in the fourth quarter. California State Teachers Retirement System now owns 33,849 shares of the company’s stock worth $1,779,000 after buying an additional 620 shares during the period. Oppenheimer & Close LLC raised its position in shares of Seacor Holdings by 107.9% in the fourth quarter. Oppenheimer & Close LLC now owns 172,499 shares of the company’s stock worth $9,067,000 after buying an additional 89,537 shares during the period. California Public Employees Retirement System raised its position in shares of Seacor Holdings by 6.3% in the fourth quarter. California Public Employees Retirement System now owns 87,718 shares of the company’s stock worth $4,610,000 after buying an additional 5,200 shares during the period. Rhumbline Advisers raised its position in shares of Seacor Holdings by 2.6% in the fourth quarter. Rhumbline Advisers now owns 33,617 shares of the company’s stock worth $1,767,000 after buying an additional 840 shares during the period. Finally, Swiss National Bank raised its position in shares of Seacor Holdings by 1.7% in the fourth quarter. Swiss National Bank now owns 24,200 shares of the company’s stock worth $1,272,000 after buying an additional 400 shares during the period.

SEACOR Holdings Inc is engaged in owning, operating, investing in and marketing equipment, primarily in the offshore oil and gas, shipping and logistics industries. The Company’s segments include Offshore Marine Services, Inland River Services, Shipping Services and Illinois Corn Processing. The Offshore Marine Services segment operates a fleet of support vessels primarily servicing offshore oil and gas exploration, development and production facilities around the world.

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