Thu, Jun 5, 2025, 6:33 p.m. 3 min read NEUR.PVT (Reuters) -U.S. President Donald Trump on Tuesday called for a review of subsidies awarded to Elon Musk's companies, sparking fears of tougher regulatory scrutiny across the billionaire's ventures in the transportation, energy and space sectors. Below is a list of U.S. regulators who oversee Musk's companies, including automaker Tesla, rocket and satellite company SpaceX, brain implant company Neuralink, social media platform X and construction firm The Boring Company. National Highway Traffic Safety Administration Tesla faces ongoing oversight from U.S. auto safety investigators about the safety of its vehicles especially when using advanced driver assistance systems. Last month, the regulator asked the EV maker for more information after reviewing online videos of a robotaxi allegedly using the wrong lane and of speeding by another driverless vehicle, shortly after Tesla launched a limited, paid robotaxi test service in Austin, Texas. The agency is reviewing the responses to its questions about the safety of the robotaxi in poor weather among numerous issues. The NHTSA has been investigating Tesla's full self-driving collisions in reduced roadway visibility conditions since October. Federal Communications Commission The Federal Communications Commission in April voted to open a review of the decades-old spectrum sharing regime between satellite systems sought by SpaceX. SpaceX wants access to new spectrum from the FCC in the coming years to speed deployment of satellite-based internet service. The review by the U.S. telecom regulator aims to allow a greater and more intensive use of spectrum for space activities. Existing reductions approved in the 1990s limit power usage that prevent better coverage from SpaceX's Starlink and other systems. Food and Drug Administration The FDA oversees the clinical trials for Neuralink, Musk's brain implant company, deciding whether such trials can take place and whether Neuralink can eventually sell its device to consumers. The agency already approved such trials in the U.S. Neuralink has also been pursuing clinical trials outside the U.S, including in Canada. The FDA had initially rejected Neuralink's request to start clinical trials, citing safety risks, Reuters reported in 2023. The agency has since given the startup approval to do clinical trials, which are ongoing. Environmental Protection Agency SpaceX faces environmental regulations from the EPA, which oversees the company's wastewater discharges at its operating site in Texas. The company's operations are also subject to environmental reviews under the National Environmental Policy Act, with several agencies including the Fish and Wildlife Service required to analyze the impact of the company's rocket launches and landings on land, water and wildlife. Story Continues