The projected cost of the 90,000-square-foot build has doubled to $400 million, up from its July estimate of $200 million. President Donald Trump has insisted it will not come out of taxpayers’ wallets, though public funds are being used for underground security work connected to the project, according to the Associated Press.

The ballroom project has taken on new urgency for Trump and his allies after after a suspect allegedly attempted to storm the White House correspondents’ dinner on Saturday, which they have pointed to as evidence that presidents need a secure venue for large events on White House grounds.

“What happened last night is exactly the reason that our great Military, Secret Service, Law Enforcement and, for different reasons, every President for the last 150 years, have been DEMANDING that a large, safe, and secure Ballroom be built ON THE GROUNDS OF THE WHITE HOUSE,” Trump wrote on Truth Social on Sunday. “This event would never have happened with the Militarily Top Secret Ballroom currently under construction at the White House. It cannot be built fast enough!”

The Justice Department also cited the incident as it pressed the National Trust for Historic Preservation to drop its lawsuit challenging the project. In a Sunday letter posted by acting Attorney General Todd Blanche, Assistant Attorney General Brett Shumate wrote that “when the White House ballroom is complete, President Trump and his successors will no longer need to venture beyond the safety of the White House perimeter to attend large gatherings at the Washington Hilton.” The department later filed a court motion asking a judge to reconsider a lower-court pause on construction.

A list released by White House officials and reviewed by Fortune shows all 37 donors helping fund the ballroom—and it includes some of the nation’s largest tech companies, companies with government contracts and members of the administration. 

Their private, tax-deductible donations will be made to the nonprofit Trust for the National Mall. The White House did not release the size of the donations for all 37 listed. Trump has previously said he will pay for some of the project, though his name doesn’t appear on the list.

Corporate Donors

1. Meta Platforms

CEO Mark Zuckerberg previously attended a White House dinner for tech leaders in September, where he pledged at least $600 billion in investments in the U.S. by 2028. Meta, the parent of Facebook, Instagram and WhatsApp, frequently engages with federal digital policy initiatives and AI oversight forums.

2. Apple

The company announced plans in August to invest $100 billion in domestic manufacturing, aligning with Trump’s wishes to reshore industrial work. CEO Tim Cook also attended the White House dinner last month and has maintained a close relationship with the administration.

3. Amazon 

Founded by Jeff Bezos, the e‑commerce and cloud‑computing company has major federal contracts with the Pentagon and has cultivated a new relationship with the administration through intense lobbying.

4. Google

 The search giant’s parent company agreed to pay $24.5 million to settle a dispute with Trump earlier this year over his YouTube ban following the Jan. 6 Capitol riots. Alphabet pledged $22 million of the settlement money to go toward the ballroom construction.

5. Lockheed Martin 

The defense contractor is a major supplier for Pentagon programs and has received $33.4 billion in federal contract awards in 2025 alone, according to USA Spending. The company is reportedly contributing more than $10 million to the ballroom.

“Lockheed Martin is grateful for the opportunity to help bring the President’s vision to reality and make this addition to the People’s House, a powerful symbol of the American ideals we work to defend every day,” a spokesperson told Fortune.

6. Microsoft

The software and cloud provider has multibillion-dollar federal contracts, including AI partnerships integral to U.S. cybersecurity strategy.

7. Comcast 

The parent company of NBCUniversal faces scrutiny from Trump, who called for the Federal Communications Commission to revoke NBC’s license in August. He accused NBC and fellow broadcaster ABC, owned by Disney, of being “two of the worst and most biased networks in history.”

8. Altria

The parent company of tobacco brand Marlboro and one of the country’s largest tobacco firms has pushed for less FDA oversight of e-cigarettes. A subsidiary of the company, Altria Client Services, is a donor to Republican PACs. 

9. Coinbase 

The popular crypto exchange platform is headed by CEO Brian Armstrong, who has supported Trump’s push for pro-crypto regulation.

10. Palantir Technologies

The data‑analytics company has had a surge in major federal surveillance and border‑security contracts under the Trump administration.

11. T‑Mobile 

The telecommunications giant’s merger and licensing agreements were reviewed favorably during Trump’s first term. “Trump Mobile,” a Trump Organization-branded cell service, runs on the company’s network. 

12. Ripple 

The blockchain‑payments network has an interest in Trump’s push to position the  U.S. as a digital‑asset finance hub.

13. Hard Rock International 

The Seminole-owned casino and hotel brand’s chairman, Jim Allen, once served as a vice president of operations at the Trump Organization.

14. Tether America

The crypto stablecoin issuer has supported Trump’s “digital‑dollar alternative” framework. 

15. Union Pacific Railroad 

The freight‑transportation company is hoping to merge with Norfolk Southern under a Republican-led SEC.

16. Micron Technology 

The U.S. chip manufacturer was celebrated by the White House this year after announcing a $200 billion investment in the country.

17. Caterpillar 

The heavy‑machinery manufacturer is viewed by the administration as symbolic of the “Made in America” push.

18. Booz Allen Hamilton 

The defense and cybersecurity contractor said in its second-quarter earnings call that 90% of its $7.2 billion made in bookings in the quarter came from national security work.

19. HP 

The computer hardware maker gave $50,000 to Trump’s 2025 inaugural committee and has received contracts from the U.S. military and other departments.

20. NextEra Energy 

The top renewable‑energy utility’s CEO, John Ketchum, previously said he agrees with the administration’s focus on bringing jobs back to America, but has also criticized Trump’s efforts to boost the coal industry.

21. Reynolds American 

The tobacco conglomerate’s PAC gave $25,000 to a Trump fundraising committee in 2016.

Private and Family Donors

22. The Adelson Family Foundation 

The philanthropic arm of the late Sheldon Adelson, a casino mogul and longtime Republican donor, is now run by his widow, Miriam, who is another big GOP donor and received the Medal of Freedom from Trump during his first term. 

23. Stefan E. Brodie 

The industrial metals investor was convicted in the early 2000s of violating U.S. sanctions on Cuba, and a 2023 pardon request to President Biden was denied.

24. Betty Wold Johnson Foundation

The charitable organization funded by the Johnson & Johnson heiress is known for gifts to education, health and civic projects.

25. Charles and Marissa  Cascarilla 

Charles co‑founded blockchain firm Paxos. The couple advocate for financial‑technology deregulation.

26. Edward and Shari Glazer 

The siblings and Florida sports tycoons own the NFL’s Tampa Bay Buccaneers and have partial ownership of Manchester United. The Glazers are also recurring donors to Trump PACs.

27. Harold Hamm 

The oil billionaire and Continental Resources founder has been an informal adviser to Trump on energy issues.

28. Benjamín Leon Jr.

The Cuban-American Miami healthcare entrepreneur and philanthropist donated over $3 million to Trump’s 2024 campaign run and was nominated by Trump in January as U.S. Ambassador to Spain and Andorra. His nomination is pending Senate confirmation.

29. The Lutnick Family 

Led by Secretary of Commerce Howard Lutnick, the family is a major supporter of Trump’s economic agenda and philanthropy.

30. The  Laura  and Isaac Perlmutter Foundation

The former CEO of Marvel Entertainment and his wife are consistent donors to Republican and Israel‑U.S. causes.

31. Stephen A. Schwarzman 

The Blackstone CEO served as an intermediary between Trump and China amid a trade war during his first term.

32. Konstantin Sokolov

The Russian‑born American investor is involved in infrastructure and energy holdings.

33. Kelly Loeffler and Jeff Sprecher 

Loeffler heads the Small Business Administration and is a former U.S. senator from Georgia. Her husband Sprecher is the founder and CEO of Intercontinental Exchange, which owns the New York Stock Exchange. They donated $5 million to Trump’s 2024 election efforts. 

34. Paolo Tiramani

Tiramani is Co-Chief Executive Officer and majority shareholder of BOXABL, a Las Vegas-based housing technology company known for its modular, foldable homes. He holds more than 155 patent filings spanning a wide range of technologies and design innovations.

35. Cameron Winklevoss

The cofounder of crypto platform Gemini and early Bitcoin billionaire is a consistent GOP donor lobbying for clear crypto laws.

36. Tyler Winklevoss

The Gemini cofounder and twin brother of Cameron shares similar cryptocurrency advocacy and technology‑investment roles.

37. J. Pepe and Emilia Fanjul

Part of the powerful sugar family in Florida and Republican donors, they hosted a second‑term Trump fundraiser at their Palm Beach estate.

A version of this story was published on Fortune.com on October 26, 2025.