The Boston Celtics stand as one of the NBA’s most storied franchises, boasting 18 championships and a passionate fan base that bleeds green. Yet behind the on-court glory lies a business empire—and in August 2025, that empire changed hands in one of the biggest deals in sports history. A private equity powerhouse stepped in, ushering in a new era while promising to keep the championship DNA intact. So, who owns the Boston Celtics today, and what does it mean for the future of this iconic team?
The End of an Era: Wyc Grousbeck’s Legacy
For more than two decades, the Celtics were guided by Wyc Grousbeck and his family-led group, Boston Basketball Partners. They purchased the franchise in 2002 for $360 million and delivered two NBA titles—in 2008 and 2024—while making the playoffs in 20 of 23 seasons. Under Grousbeck’s watch, the Celtics became a model of stability and success in professional sports.
But after the 2024 championship, the group announced plans to sell as part of estate planning. The timing felt bittersweet: the team was at its peak, yet a new chapter was inevitable.
Bill Chisholm Takes the Reins
Fast forward to August 19, 2025: the sale finalized, and Massachusetts native Bill Chisholm emerged as the new lead owner and governor of the Celtics. A managing partner and chief investment officer at STG Partners (formerly Symphony Technology Group), Chisholm is a lifelong Celtics fan who grew up in the Boston area, graduated from Dartmouth College, and earned an MBA from Wharton. His deep roots in New England and private-equity expertise made him the perfect fit for a franchise that values both tradition and forward-thinking business moves.
Chisholm didn’t just buy a team—he bought his childhood dream. In press conferences, he vowed, “Coming in second is not the objective… We’re going to get more [championships].”
The Record-Breaking Deal
Chisholm’s investor group paid a then-record $6.1 billion for majority control (at least 51 percent). The structure is phased: full ownership transfers by 2028, at which point the total valuation could reach $7.3 billion. The NBA Board of Governors approved the deal unanimously, marking the highest price ever paid for an American professional sports franchise at the time.
Wyc Grousbeck remains deeply involved. He holds roughly 13 percent equity, serves as co-owner, CEO, and alternate governor, and will help run day-to-day operations through at least 2028. This continuity was crucial to fans and the league alike.
Meet the New Ownership Group
The Celtics’ ownership is now a collaborative investor collective of roughly two dozen members. Chisholm leads, supported by a managing board that blends new capital with familiar faces.
Here’s a look at the key stakeholders:
| Name | Role | Notable Background |
|---|---|---|
| Bill Chisholm | Lead Owner & Governor | STG Partners managing partner; Massachusetts native and lifelong Celtics fan |
| Wyc Grousbeck | Co-Owner, CEO & Alternate Governor | Former lead owner (2002–2025); guided two championships |
| Aditya Mittal | Co-Owner & Alternate Governor | CEO of ArcelorMittal; major investor contributing nearly $1 billion |
| Rob Hale | Co-Owner | Granite Telecommunications CEO; existing Celtics minority owner since 2012 |
| Andrew Bialecki | Co-Owner | Klaviyo CEO |
| Bruce Beal Jr. | Co-Owner | President of Related Companies |
| Mario Ho | Co-Owner | 30-year-old NIP Group founder; youngest major stakeholder |
| Ian Loring | Co-Owner | Haveli Investments senior managing director |
| Sixth Street | Major Participant | Global investment firm (capped at ~10–20% per NBA rules) |
This mix of tech, private equity, manufacturing, and local business leaders brings fresh resources while honoring the franchise’s Boston identity.
What It Means for Fans and the Franchise
Early signals from the 2025–26 season are encouraging. Chisholm has made clear that staying competitive—and paying the luxury tax when necessary—is a priority. In an April 2026 Q&A, he discussed his first season at the helm, the team’s future at TD Garden, and his commitment to “doing whatever it takes” for banners.
Social media captured the excitement immediately. The official Celtics account posted: “Bill Chisholm and our revamped ownership group share a common view when it comes to chasing banners: ‘Let’s raise as many as we can.’” You can watch the full ownership introduction press conference here on YouTube. Fans on Reddit celebrated the continuity, noting how the sale keeps the team in strong hands (see the r/bostonceltics thread here).
Looking Ahead: More Banners in Boston
The transition has been remarkably smooth. With Brad Stevens still leading basketball operations and a championship-caliber roster core, the Celtics enter this new era poised for continued success. Chisholm’s group isn’t here to rebuild from scratch—they’re here to build on a dynasty.
For Celtics fans, the message is clear: the green will keep winning. Whether it’s another parade down Causeway Street or global expansion under innovative owners, the future looks brighter than ever.
In the end, ownership changes are about legacy and vision. Bill Chisholm and his partners have big shoes to fill after the Grousbeck era, but their track record, local ties, and hunger for titles suggest the Celtics are in very good hands. The next championship run is already underway.