Boston-based health and fitness wearables company Whoop has secured $575 million in its Series G funding round, pushing its valuation to $10.1 billion. Among the high-profile investors are golf stars Rory McIlroy and Shane Lowry, joining an elite list of athletes including Cristiano Ronaldo, LeBron James, and Virgil van Dijk.

The funding, announced around late March 2026, will support Whoop’s global expansion plans. The company, known for its minimalist fitness bands and subscription-based platform, tracks key biometrics such as sleep, recovery, strain, and overall health metrics to help users “unlock human performance and healthspan.”

Whoop already has a strong presence in professional sports, with many PGA Tour players — including Scottie Scheffler, Nelly Korda, and Justin Thomas — regularly wearing the device on and off the course.

McIlroy, a five-time major champion and longtime proponent of data-driven training, reportedly made an eight-figure investment in the round. Lowry, his Ryder Cup teammate and 2019 Open champion, also participated. Both golfers have shown interest in performance optimization technology, making their backing a natural fit for Whoop’s focus on recovery and longevity.

Ronaldo, a global ambassador for Whoop, highlighted the strap’s role in his training: “Whoop has become one of the most important tools I use to support my long-term health.” The round also drew institutional support from entities like the Qatar Investment Authority, Mubadala Investment Company, and health organizations including Abbott Laboratories and the Mayo Clinic.

Whoop maintains a significant European footprint, employing about 150 people at its Limerick, Ireland headquarters, with plans for further expansion there. The investment underscores growing interest from elite athletes in wearable technology that goes beyond basic step counting to deliver actionable insights on strain and recovery.