Lisa McClain’s family’s stake in Musk’s xAI could benefit from SpaceX IPO

Rep. Lisa McClain, one of the House GOP’s top leaders, has a family investment she’s ready to take advantage of. SpaceX making public history after her husband bought up to $250,000 in Elon Musk’s artificial intelligence company xAI before it was folded into the rocket maker.

McClain, R-Mich., the No. 4 House Republican and chairwoman of the House Republican Conference, disclosed her spouse’s purchases on December 15 in a congressional filing. The work was valued between $100,001 and $250,000.

CNBC did not find another part of Congress that has the same clarity on SpaceX or the expected first public offering of technology from companies such as OpenAI and Anthropic, although the holdings of private companies can be difficult to track through spouses, trusts, LLCs or business funds.

The investment was linked to SpaceX in February, when Musk folded his xAI startup into the rocket and satellite company. SpaceX opened its IPO at $150 a share, raising nearly $75 billion and pushing the company’s market cap above $2 trillion.

For McClain’s family, the potential upside is huge. If the xAI stake is converted into SpaceX shares, market-tracking estimates based on SpaceX’s market capitalization on Friday suggest the investment could show a paper gain of up to $150,000 — about a full year of McClain’s $174,000 conference salary.

“Chairman McClain’s investment is public record,” Joe Buccino, communications director for the House Republican Conference, told CNBC in a statement. “They are made in accordance with all applicable House rules.”

A potential payday follows a series of events that have already been considered.

Days after McClain’s husband, Michael, bought a stake in xAI in December, the Defense Department announced plans to integrate Grok models from xAI into GenAI.mil, a Pentagon platform designed to help military personnel use generative AI tools.

In January, Defense Secretary Pete Hegseth announced a broad expansion of Grok’s role within the Pentagon, including access to Defense Department networks. A few weeks later, Musk folded xAI into SpaceX.

There is no evidence that McClain knew about the Pentagon’s xAI plans before the purchase, that she was involved in those decisions or that she or her husband traded on non-public information. He does not serve on any congressional committees dealing with defense or technology. Members of Congress are allowed to own stocks and make private investments, as long as they comply with disclosure laws and do not trade on confidential information.

“I can assure you 100% that we didn’t have inside information. Because if we did, we wouldn’t have bought 100,000 shares, we would have bought a heck of a lot more,” McClain said when asked about the trade in a NewsNation interview in January.

McClain, who serves on the powerful Financial Services Committee, is one of Congress’ most successful businessmen in terms of the number of exposed house deals. Capitol Trades, which tracks congressional financial disclosures, lists him in 1,443 transactions over the past three years — about 98% of politicians with trades reported on their database.

In October, NOTUS reported that McClain violated the STOCK Act for the second time that year by disclosing between $360,000 and $900,000 in stock trades that her husband made months late. The exchange included shares of Palantir, Power of NuScale, Tesla, Nvidia, Taiwan Semiconductor Manufacturing Company, Rigetti Computing again BigBear.aiaccording to the report.

McClain allegedly failed to report more than 500 stock and bond transactions made by her husband that may have been worth millions of dollars, NOTUS previously reported.

The STOCK Act requires members of Congress to disclose transactions made by themselves, their spouses and their children. The late filing helped fuel a bipartisan push to bar lawmakers and their immediate families from trading individual stocks.

SpaceX’s public debut comes as Musk and his companies have become increasingly important players in Republican politics and federal contracting.

The company’s political giving has also fared well. From January 2025 to March 2026, his PAC gave 89% of its $1.4 million in donations to Republicans, according to a CNBC analysis of Federal Election Commission records and OpenSecrets. About 5% went to the Democrats, and the rest went to parties or committees without taking a clear side.

From the 2024 cycle, the SpaceX political committee splits its money evenly, sending 62% to Republicans and 37% to Democrats.

The SpaceX PAC is funded by the company’s employees and management, not the company’s financial resources. It differs from Musk’s personal political career, which has poured millions into Republican super PACs linked to the GOP’s House and Senate campaigns.

SpaceX did not respond to a request for comment.