A Secret Service agent walks near the White House on Tuesday, April 28, 2026, in Washington. (AP Photo/Julia Demri Nikhinson)

The White House has now released the names of 21 US companies that are donating millions to build a new 90,000-square-foot ballroom on its grounds, a project whose estimated cost has doubled since July to $400 million. The announcement from the White House comes amid increased urgency following a security incident at a correspondents’ dinner last weekend, the Associated Press reports. US President Donald Trump has insisted that the ballroom will not be funded by taxpayers, although public funds are being used for underground security infrastructure. In a post shared on Truth Social, Trump wrote, “What happened last night is exactly why our great military, the Secret Service, law enforcement and, for different reasons, every president for the last 150 years, are demanding that a large, safe and secure ballroom be built on the grounds of the White House. This event would never have happened with the Military Top Secret Ballroom currently under construction at the White House. Can’t make it fast enough! While beautiful, it has all the highest level security features, plus, there is no room at the top for unsecured people, and it is right inside the gates of the most secure building in the world, the White House. This ridiculous ballroom lawsuit brought by a woman walking her dog who has absolutely no ability to bring such a suit should be dropped immediately. Nothing should be allowed to interfere with its construction, which is on budget and well ahead of schedule!!! Thank you for your attention to this matter.”The Justice Department has cited this incident in urging the National Trust for Historic Preservation to drop its lawsuit against the project, arguing that the ballroom would enable presidents to host large gatherings without leaving the confines of the White House.

List of 21 American companies who donated millions for the new ballroom of Trump administration

The list reviewed by Fortune includes some of the country’s largest technology companies, defense contractors and energy companies. Of the 21 major donors:* Meta Platform – Promised billions in US investments by 2028.* Apple – Announces $100 billion in domestic manufacturing plans.* Amazon – Maintains major Pentagon contracts.* Google (Alphabet) – Contributed $22 million from the settlement to Ballroom.* Lockheed Martin – Reportedly donated more than $10 million.* Microsoft – Involved in federal cybersecurity partnerships.* Comcast – parent of NBCUniversal, frequent critic of Trump.* Altria – The tobacco giant’s support led to reduced FDA oversight.* Coinbase – Crypto exchange supports pro-crypto regulation.* Palantir Technologies – Major federal surveillance contractor.* T-Mobile – Network partner for Trump-branded cell service.* Ripple – Blockchain payments firm aligns with digital-asset policy.* Hard Rock International – casino brand with the Trump Organization.* Tether America – stablecoin issuer supporting digital-dollar options.* Union Pacific Railroad – Fulfilling merger ambitions.* Micron Technology – Pledged $200 billion in US chip investment.* Caterpillar – Symbol of “Made in America” ​​manufacturing.* Booz Allen Hamilton – Defense and cyber security contractor.*HP – Longtime donor with military contracts.* NextEra Energy – renewable energy utility balancing coal policy criticism.* Reynolds American – Tobacco conglomerate with past Trump fundraising ties.The donation is being donated to the Trust for the National Mall, which is a non-profit organization and is tax-deductible. While Trump has said he will personally contribute, his name does not appear on the donor list.