The marine division of Fort Lauderdale-based company Seacor Holdings on Friday began trading in the stock market, just weeks after a successful spinoff from its parent company.

Seacor Holdings provides equipment and vessels to the offshore oil and gas, shipping and logistics industries. It trades on the New York Stock Exchange under the ticker CKH. Last month, it announced it would make its marine division, Seacor Marine Holdings, a separate, publicly traded entity.

Seacor Marine Holdings now trades…