Siris, which bought Equiniti in 2021 and merged it with its U.S. arm AST, has agreed to sell the London‑ and New York‑based transfer agent to Bullish. The deal values the shareholder‑services platform at $4.2 billion and is slated to close in January 2027. Equiniti currently acts as the regulated transfer agent for nearly 3,000 public companies. The transaction expands Bullish’s footprint in capital‑market infrastructure, complementing its existing properties Bullish Exchange and CoinDesk.

Siris built Equiniti into a global platform by pairing the UK‑based firm with AST, its U.S. counterpart, creating a scaled service offering for issuers across both sides of the Atlantic. The combined entity now supports corporate actions, shareholder communications and compliance reporting, positioning it as a rare, end‑to‑end solution in a fragmented market.

For investors, the sale signals consolidation among fintechs that provide back‑office services to public companies. Bullish gains a ready‑made client base and data infrastructure, potentially enhancing its revenue streams beyond media and exchange operations. Meanwhile, Siris can redeploy capital into higher‑growth segments of its portfolio.

The $4.2 billion price tag places the deal among the largest recent M&A moves in the shareholder‑services sector. With closing set for early 2027, Bullish will integrate Equiniti under its umbrella, operating alongside Bullish Exchange and CoinDesk, creating a unified platform for capital‑market participants.