At least 23 reported contributors to the White House ballroom, including Lockheed Martin, Palantir and T-Mobile, should have disclosed those donations as part of their regular lobbying disclosure filings.

White House ballroom donations should be disclosed on lobbying disclosure reports - CREW | Citizens for Responsibility and Ethics in Washington
At least 23 reported contributors to the White House ballroom should have disclosed those donations as part of their regular lobbying disclosure filings.