Celtics Near Record $6.1B Sale to Chisholm-Led Group

The Boston Celtics are close to finalising a record-breaking $6.1 billion sale to a group led by William Chisholm, with the deal expected to close within the next two weeks, pending NBA approval. This historic valuation will make it the most expensive franchise transaction in North American sports history, eclipsing recent mega-deals across the NFL, NBA and MLB. It reflects both the Celtics’ enduring brand power and the surging valuations of elite sports teams as global investment assets.

Bill Chisholm, a Massachusetts native, longtime Celtics fan and managing partner at STG Partners, is set to take over from Wyc Grousbeck, who has led the team since 2002. Under Grousbeck’s stewardship, the Celtics captured NBA championships in 2008 and 2024. They maintained a reputation as one of the league’s most consistently competitive franchises. The ownership transition will occur in phases, with Grousbeck retaining his role as governor through at least the 2027–28 season, ensuring stability and continuity as the new leadership takes shape.

The financing for the purchase has been bolstered by a significant $1 billion investment from Indian steel magnate Aditya Mittal, making him a key figure in the deal and likely the second-largest stakeholder, with the potential to serve as alternate governor. His backing was critical to securing the bid, alongside capital from private equity firm Sixth Street and minority stakeholders Robert Hale Jr. and Bruce A. Beal Jr. The investor group combines deep local ties with global business reach, signalling a shift toward a more internationally connected ownership model.

Closing this transaction will mark a turning point for the Celtics, transforming the organisation from a locally anchored, historically run franchise into a modern, investment-backed sports enterprise positioned for long-term growth. The new ownership is expected to bring fresh capital for player development, arena enhancements and digital innovation, as well as a strategic vision to further globalise the Celtics brand. Leveraging international networks could open new revenue streams in overseas markets, merchandising and cross-sport partnerships.

Despite the impending change in ownership, the Celtics remain focused on maintaining their competitive edge on the court while expanding their off-court business operations. The franchise’s place in Boston’s rich sporting culture is secure, but its ambitions are global. Plans are likely to include enhanced fan engagement strategies, expanded sponsorship portfolios and deeper integration of technology into the fan experience.