Whoop Plans to Nearly Double Boston Headquarters With 107K SF

• Whoop is in talks to lease 107,000 SF at 660 Beacon St, next door to its Kenmore Square headquarters
• The deal would roughly double the company's Boston footprint, to about 228,000 SF
• CEO Will Ahmed says he expects an IPO in about 18 months
• Whoop's valuation hit $10.1B in March on a $575M Series G round

Whoop, the wearable maker of the screenless fitness strap worn by athletes from LeBron James to weekend cyclists, is closing in on a lease that would nearly double its Boston headquarters.

The company is negotiating for 107,000 SF at 660 Beacon St, part of Related Beal's One Kenmore Square redevelopment and immediately adjacent to Whoop's current home in the Commonwealth Building. The lease hasn't been signed yet, but if it closes, it would rank among the largest office leases in Boston this year. The added space is built to hold up to 1,000 more employees, on top of the roughly 1,000 the company already houses across its existing 121,000 SF.

Why Boston, why now

The expansion tracks a run of good news for Whoop. The company closed a $575M Series G in March at a $10.1B valuation and has said it will hire more than 600 people in 2026, a roughly 75% jump in headcount, spanning technical, scientific, creative and commercial roles, most of them based in Boston. Founder and CEO Will Ahmed told Bloomberg he now expects an IPO in about 18 months. Keeping the workforce concentrated at home, he said, gives Whoop an edge on retention over startups chasing talent in New York or San Francisco, arguing Boston builds employees who stay committed to a company's mission rather than chasing the next hype cycle.

The building has a track record

660 Beacon St isn't a speculative bet. Boston biotech AI Proteins leased 40,000 SF there earlier this year, part of the same 471,000 SF One Kenmore Square project Related Beal built out of former Boston University buildings it bought for $140M in 2016. The broader market is cooperating too: Boston's office sector posted roughly 800,000 SF of net absorption in the second quarter, ahead of the same period in 2025, according to CBRE, as landlords work through a glut of vacant space.

From startup to full-building tenant

Whoop's relationship with the block goes back to 2021, when it signed a 121,000 SF lease for all eight floors of the newly built Commonwealth Building, its first full-building headquarters, after a $100M Series E round valued the company at $1.2B. It moved in the following year and opened the space that summer. Five years and a tenfold valuation jump later, the company is turning to the building next door for room to keep growing.

What's next

The lease still needs to be finalized, and neither Whoop nor Related Beal has disclosed asking rent or term length. If it closes, Whoop would control roughly 228,000 SF across both buildings at One Kenmore Square, with an IPO clock now running at around 18 months.