Svitzer was spun off from A.P. Moller-Maersk A/S about a year ago, and the shares had lost about 8% since the listing on Nasdaq Copenhagen before April 2.
The American Apparel & Footwear Association warned that the cuts could lead to unfair competition with countries "not held to the same laws and standards for labor abuses."
The sector is already preparing for imminent additional risk, with new clauses that state companies hiring Chinese ships will bear the cost of any taxes.
The American Business Immigration Coalition is leading a push for "bipartisan, common-sense immigration solutions balancing security and economic strength."
French Minister for Gender Equality Aurore Bergé said that French companies "don't plan to change their policies," and that forcing firms to comply is "out of the question."