While the United States is unable to stop the North Koreans from abandoning their nuclear weapons program, they’re going after the companies that do business with the government of Kim Jong Un.
The Treasury Department has slapped additional sanctions on the financial, coal mining and military interests of North Korea by targeting companies that aid it in obtaining weapons of mass destruction and its continued violations of United Nations Security Council resolutions.
The sanctions bar the companies and individuals from doing business with American citizens, and any assets they have in the United States or under U.S. control would be frozen
The sanctions are mostly symbolic since it’s unlikely that the targeted companies or individuals have any such business dealings or U.S. assets. Previous sanctions have had little apparent effect.