LeBron James becomes a Whoop global ambassador 11 years after joining as one of its first 100 members, as the $10.1 billion tracker he invests in eyes an IPO

LeBron James has worn a Whoop strap for 11 years. Now he is being paid to say so. The Boston health tracker named James a global ambassador on Thursday, Oct. 29, the 23rd anniversary of his NBA debut, turning one of the longest-running unpaid product relationships in sports into a formal endorsement. James is also an investor in the company, which was valued at $10.1 billion earlier this year and is preparing for a possible stock market listing.

Neither side has disclosed the terms of the deal or the size of James’ stake. What they have shared is the plan: James will star in global marketing campaigns and multimedia content for Whoop, and the company will release a limited-edition band designed with his input, similar to the one it made with Cristiano Ronaldo.

It’s official. @whoop 🤝 @kingjames

23 enters his 24th season. Still a force. Always measured.
Keep going. pic.twitter.com/3hsfOvEXkj

— WHOOP (@WHOOP) October 29, 2026

One of the first 100 members

James started wearing Whoop in 2015, when the company was a three-year-old startup whose strategy was to put its strap on elite athletes through their trainers. James was introduced to it by Mike Mancias, his longtime trainer, and became one of Whoop’s first 100 members. There was no commercial relationship at the time, founder and chief executive Will Ahmed said, but the sight of James wearing the band helped build the brand.

“LeBron is one of the greatest examples of longevity in professional sports,” Ahmed said. “What’s exciting about this partnership is that we get to tell that story together and show people that performance isn’t just about what you do on the court.”

James framed it the same way. “I’ve spent my career doing everything possible to keep my body at peak performance. For the last 11 years, WHOOP has been part of that,” he said in the announcement. “I know my body better today than I did at 25. I’m not trying to be great for my age. I’m trying to be great, period. That’s why making this partnership official feels like a natural next step.”

What the data says

Whoop used the launch to publish a small slice of James’ own numbers. The company said he ranks in the top 10% of its entire member base for sleep efficiency, has not missed a single day of data collection in 2026, and logged more than nine hours of sleep on his 40th birthday with a recovery score above 80%.

That data belongs to James, not the 76ers. Under the NBA’s labor agreement, teams can only ask players to wear approved devices on a voluntary basis, and information from them cannot be used in contract negotiations, trades or waivers. For a 41-year-old who has had to answer questions about his back and his minutes all month, a company is now paying to publish exactly the kind of health data his team could never use against him at the bargaining table.

The timing has worked out for the marketing. Whoop posted a clip titled “Landed in Philly” on Friday before James had 20 points, nine rebounds and eight assists and made the late putback that sealed a 98-93 NBA Cup win over the Knicks. The company followed it after the game with “23 seasons since his first game. A decade of data. One more win.”

A $10.1 billion company with an IPO in view

Whoop raised $575 million in a Series G round earlier this year at a $10.1 billion valuation. The round was led by Collaborative Fund and included 2PointZero Group, the Qatar Investment Authority, Mubadala Investment Company and the medical device maker Abbott, along with 10 other firms. James invested in that round alongside a list of athletes that includes Ronaldo, Rory McIlroy, Reggie Miller, Virgil van Dijk and Shane Lowry.

He was not the first NBA star in. Kevin Durant has invested in Whoop several times since 2017, and the company was valued at $125 million in its Series C the following year. The latest valuation is 81 times higher than that, a return that makes Durant’s early checks among the best investments any active NBA player has made.

Whoop says it has raised more than $950 million in venture capital and now has about 3.5 million paying members. It said it was cash-flow positive last year and finished the year at an annual revenue run rate of $1.1 billion. Ahmed said in March that he expected the Series G to be the company’s last private funding round, which points toward a public listing, but he has not committed to a date. “We’re building Whoop for the long-term, not toward a specific IPO date,” he said this week. “At the same time, when the timing makes sense, we will be ready.”

For James, an IPO is where an investor-ambassador deal pays off. His endorsement makes the brand more visible, and his equity stake grows in value if the company lists at a higher price.

Where it fits in James’ portfolio

The Whoop deal adds to an off-court business that dwarfs what James earns playing. He signed a two-year, $8 million contract with Philadelphia in July and will make a little under $4 million from the 76ers this season. He also has a $15 million-a-year Polymarket endorsement to promote football markets, his Fanatics trading-card deal, which includes an aviation clause, and the lifetime Nike contract he signed in December 2015, which his business partner Maverick Carter has said is worth more than $1 billion.

Whoop is a different kind of deal from the Polymarket one. It sits in a category the league has no rules problem with, and it carries equity rather than a straight fee. That puts it closer to the ownership-style investments more NBA players are making, from Durant’s portfolio to Shai Gilgeous-Alexander buying into Atlético Madrid, than to a standard sponsorship. It also lands in the same week the 76ers became the first NBA team to sign a prediction market partner, a reminder of how many sponsors now want a piece of James’ first season in Philadelphia.

The Oura question

Whoop has not always won the NBA’s business. When the league built its health plan for the 2020 Orlando bubble, its wearables committee looked at several devices, including Whoop, and chose Oura’s smart ring, mostly because the ring measures skin temperature from the finger. Oura’s chief executive said at the time that temperature was a key reason the league did not go with Whoop or Apple.

Six years later, Whoop has the NBA’s oldest active player wearing its band in public, an investor list that runs from Gulf sovereign wealth funds to Reggie Miller, and a founder saying the company will be ready to go public when the time is right. James has said little about how much longer he will play. Whoop’s bet is that his longevity is a better advertisement than any season he has left.