He listed his ownership interest in Glittering Steel as worth $100,001 to $250,000.

Mr. Bannon intends to sell his interest in Glittering Steel and Cambridge Analytica under an agreement he has with the Office of Government Ethics. He also reports that Bannon Strategic Advisors “will be going dormant” and receive only passive income from investments during his time in the White House.

Mr. Bannon disclosed receiving a $100,000 salary from an entity affiliated with Citizens United Productions, a film-production company that is run by David N. Bossie, Mr. Trump’s former deputy campaign manager. Mr. Bossie introduced Mr. Bannon to Mr. Trump in 2011. Mr. Bossie’s Citizens United received $3.5 million from the Mercer Foundation from 2012 to 2014, according to tax returns.

Government Accountability Institute is an organization founded by Peter Schweizer and Mr. Bannon that pledges to “investigate and expose crony capitalism, misuse of taxpayer monies, and other governmental corruption or malfeasance.” The Mercer Family Foundation donated $2 million to the organization in 2013 and 2014, according to tax records.

Mr. Bannon worked as a media banker for Goldman Sachs several decades ago and built up some of his fortune from royalties on reruns of the “Seinfeld” television show. Before his time at Breitbart, he helped negotiate a sale of production rights to “Seinfeld” that enabled him to acquire a share of the royalties.

In 1998, his investment bank Bannon & Company, which helped negotiate the deal, was acquired by the French bank Société Générale. On his disclosure form, Mr. Bannon reported an investment in Société Générale valued at $1 million to $5 million and listed it as “rent or royalties.”

Another Goldman alumnus who has joined the Trump administration is Gary Cohn, the director of the National Economic Council. Mr. Cohn appears to be one of the wealthiest of Mr. Trump’s White House advisers, according to his filing. His assets are valued at $252 million to $611 million, stemming chiefly from his 26-year career at the Wall Street firm.

The filing for Mr. Cohn shows that in addition to the cash and stock he received from Goldman, he has investments in a wide range of companies, both public and private. Those included stock in companies like Bank of America and Kraft Heinz, as well as stakes in a variety of private equity and hedge funds. Mr. Cohn has previously disclosed that he was planning to sell a number of stocks, as well as his stakes in the Goldman-run private funds.