WASHINGTON — The husband-and-wife team of Jared Kushner and Ivanka Trump, now both senior federal government officials, has been alongside President Trump as the White House has hosted dozens of chief executives and a handful of world leaders in recent weeks.

It is a rarefied crowd, one that has included the top executives of some of the world’s largest automobile, airline, chemical, pharmaceutical and tech companies. Mr. Kushner will continue to keep such select company now that he has helped create a new office that Mr. Trump is calling the White House Office of American Innovation.

But the financial disclosure report released late Friday for Mr. Kushner, which shows that he and his wife still benefit financially from a real estate and investment empire worth as much as $740 million, makes clear that this most powerful Washington couple is walking on perilous legal and ethical ground, according to several prominent experts on the subject.

Unlike Mr. Trump, who is exempt from conflict of interest laws, both Mr. Kushner and Ms. Trump — who took a formal White House position this past week — are forbidden under federal criminal and civil law to take any action that might benefit their particular financial holdings.