Neuralink and Scale AI Secure the Largest Venture Deals of June

In June 2025, Neuralink and Scale AI achieved significant milestones by securing two of the largest venture capital funding rounds of the month.

Neuralink: Advancing Neurotechnology at Scale

Neuralink, the brain-computer interface startup founded by Elon Musk, closed a $650 million Series C funding round. The new capital will scale clinical trials and accelerate the development of neural interfaces aimed at restoring vision and motor function. The round was led by a cohort of top VC firms, including Founders Fund, Google Ventures, Sequoia Capital, Thrive Capital, ARK Invest, Lightspeed Venture Partners, Qatar Investment Authority, G42, and others.

Scale AI: Powering Artificial Intelligence Infrastructure

Meanwhile, Scale AI, a market leader in AI data-labeling infrastructure, secured a $14.8 billion investment from Meta, bringing its post-money valuation to $29 billion. The company provides critical datasets for training artificial intelligence, supporting both commercial AI solutions and U.S. defense contracts.