The Trump Organization, led by President Donald Trump's sons Donald Trump Jr. and Eric Trump, made a controversial investment in a construction company that now stands to profit from a U.S.-government-backed rare earth minerals deal in Kazakhstan, raising questions about potential conflicts of interest. However, securities attorneys say proving any wrongdoing is nearly impossible, pointing to what one expert called a «proof problem.»
The controversy centers on a tungsten mining deal in Kazakhstan, a Central Asian nation rich in critical minerals. Tungsten is essential for manufacturing military equipment, including missiles and fighter jets, and the majority of global supply is controlled by China and Russia. The Trump administration has made securing a long-term supply of the mineral a strategic priority. In August 2025, through an investment vehicle created by Dominari Securities, which is based in Trump Tower in New York, the Trump brothers purchased a minority interest in Skyline Builders, a publicly traded construction company. Skyline Builders later merged with Cove Kaz Capital, a mining affiliate of U.S.-based investment firm Cove Capital, creating Kaz Resources, now listed on the NASDAQ under the ticker KAZR. Skyline Builders owns 20% of Kaz Resources after a $20 million investment.
The deal's origins trace back to 2023–2024, when Cove Capital negotiated with the Kazakh government to take a 70% share in the country's state-owned tungsten mining deposits. On Nov. 6, 2025, Kazakhstan President Kassym-Jomart Tokayev met with President Trump and announced that Kazakhstan had awarded a tungsten mining contract to the United States. The Export-Import Bank of the United States (EXIM) and the U.S. International Development Finance Corporation (DFC) issued letters of interest for up to $1.6 billion in financing for the project. Cove Kaz Capital was selected to perform the majority of the mining. The deal has not been finalized and is undergoing a standard review by the Securities and Exchange Commission.
Critics have suggested, without evidence, that the Trump brothers invested in Skyline Builders with advance knowledge that Kazakhstan would award the lucrative contract to the United States, thereby benefiting Kaz Resources. The Trump Organization vehemently denies this, stating that the investment was passive, made before the tungsten deal was concluded, and without any knowledge that Kazakhstan would select the U.S. for the mining rights. «The optics are bad,» said Andrew Stoltmann, a Chicago-based securities and investment fraud attorney. «You have the president's sons investing in a company that is eventually awarded a very large contract, and so it certainly raises eyebrows, it raises suspicions.» However, Stoltmann added that finding proof of wrongdoing is difficult because Trump likely would not know about his sons' passive investments unless they told him. «This is where the proof problem comes in,» he said. «It's fun to have conjecture, but I don't think there's any duty of disclosure when you are a passive investor.»
Further complicating the situation is the involvement of Commerce Secretary Howard Lutnick's former company, Cantor Fitzgerald. In June 2025, Cantor Fitzgerald underwrote a $46.8 million loan to ASP Isotopes, a company owned by businessman Paul Mann. ASP Isotopes is a subsidiary that owned a controlling voting stake in Skyline Builders. Cantor Fitzgerald is now run by Lutnick's sons, Brandon and Kyle Lutnick, after their father joined the Trump administration. Stoltmann noted that Cantor Fitzgerald stood to benefit from underwriting and advisory fees. The overlapping financial connections have fueled concerns about potential influence, but Stoltmann emphasized that without concrete evidence, the controversy may remain a «tempest in a teapot.»
The Trump Organization continues to maintain that the investment was legitimate and unrelated to any government decisions. The SEC review is ongoing, and the final contract for the tungsten mining deal has yet to be signed. Meanwhile, the case highlights the challenges of policing conflicts of interest when private business interests intersect with high-level government policy, especially in strategic sectors like critical minerals.
