SpaceX reported a significant investment gain of $561 million from its stake in Elon Musk’s Boring Company during the third quarter, according to its latest financial filing with the SEC. This gain contributed to more than half of SpaceX’s "other income" in the period and helped push the company's net income to just over $4 billion. The Boring Company, initially launched within SpaceX in 2017 and spun out in 2018, aims to transform transportation by developing underground tunnel networks with passenger stations.

Last month, the Boring Company secured $3 billion in funding, achieving a valuation of $23 billion. This round featured investment support from the United Arab Emirates alongside other Musk-affiliated backers. Currently, the Boring Company operates public transit tunnels mainly in Las Vegas where Tesla vehicles shuttle passengers on the Las Vegas Convention Center Loop. Other projects include a 20-mile tunnel plan in Nashville, Tennessee, and an ambitious 150-kilometer tunnel project called the Dubai Loop planned for the UAE.

While Boring Company’s Nashville project has faced political controversy and safety concerns related to sinkhole risks, it reflects the company’s broader goal to integrate tunnel transit systems with Tesla vehicles for urban and intercity travel. Elon Musk’s focus on expanding tunneling ventures fits into his broader vision for innovative transportation infrastructure alongside his work with Tesla, SpaceX, and Neuralink.

Additionally, SpaceX disclosed it purchased $151 million of Tesla’s Megapack energy storage systems during the quarter. Musk mentioned on an earnings call that a potential merger between SpaceX and Tesla could be beneficial, noting that both companies have formed special committees to explore the possibility. This potential transaction reflects Musk’s ongoing strategy to create closer operational ties among his key enterprises.