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Ion Bank completes purchase of Boston's The Cooperative Bank

Ion Bank completes purchase of Boston's The Cooperative Bank

Money Moves Boston, MA local

Ion Bank closed the deal on November 1 and now runs The Cooperative Bank's four Boston branches as a division.

November 1st, 2026: Ion Bank completes merger with The Cooperative Bank

Overview

Updated Nov 2

Ion Bank finished its merger with The Cooperative Bank on November 1. The Boston lender now operates as TCB, A Division of Ion Bank, with branches in Charlestown, Jamaica Plain, Roslindale and West Roxbury.

Massachusetts banking regulators approved the deal on September 30, and Ion told them it would keep all of The Cooperative Bank's offices for at least five years. Ion reports about $3.4 billion in assets; its $2.3 billion in deposits comes from its third-quarter federal call report, before the merger closed. The deal also set up a $2.5 million charitable foundation for the Boston neighborhoods the bank serves.

Why it matters

Four Boston neighborhood banks are now branches of a Connecticut lender that told regulators it will keep them open for at least five years.

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Key Indicators

$3.4B
Ion Bank total assets
After the merger, according to Ion Bank.
$2.3B
Ion Bank deposits
Ion Bank's deposits in its third-quarter 2026 FDIC call report, before the merger closed.
36
Ion Bank branches
Across Connecticut, Massachusetts and New Jersey.
4
Boston branches
Charlestown, Jamaica Plain, Roslindale and West Roxbury.
$2.5M
Charitable foundation contribution
Initial contribution for communities served by The Cooperative Bank.
5 years
Branch commitment
Ion told Massachusetts regulators it would keep The Cooperative Bank's offices open at least this long after closing.

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People Involved

David Rotatori
David Rotatori
President and Chief Executive Officer, Ion Bank
Leads Ion Bank after the merger
JB
John Battaglia
President, TCB, A Division of Ion Bank
Leads the TCB division and sits on the boards of Ion Financial, MHC, Inc. and Ion Bank

Organizations Involved

Ion Bank
Ion Bank
Mutual bank
Acquirer; parent of TCB, A Division of Ion Bank and NVE Bank, A Division of Ion Bank

Naugatuck, Connecticut-based mutual bank with 36 branches in Connecticut, Massachusetts and New Jersey.
The Cooperative Bank
The Cooperative Bank
Community bank
Operates as TCB, A Division of Ion Bank

Boston mutual bank chartered in 1898 with four branches in Charlestown, Jamaica Plain, Roslindale and West Roxbury.

Timeline

2024 November 2026

4 events Latest: November 1st, 2026 · 1 week ago
Tap a bar to jump to that date

  1. Ion Bank completes merger with The Cooperative Bank

    Latest Merger

    The Boston bank becomes TCB, A Division of Ion Bank, giving the Connecticut lender its first Massachusetts branches.

  2. Battaglia tells West Roxbury group TCB will keep its community role

    Statement

    At a West Roxbury Business Professional Association meeting, TCB president John Battaglia says the bank will keep its community work and that the visible change is new signage.

  3. Massachusetts regulators approve the merger

    Regulatory

    The Massachusetts Division of Banks and the Board of Bank Incorporation approve The Cooperative Bank's merger into Ion Bank. Ion says it will keep all TCB offices for at least five years and run them as TCB, A Division of Ion Bank.

  4. Ion Bank acquires NVE Bank in New Jersey

    Expansion

    The deal was Ion's first expansion outside central Connecticut, according to Banker & Tradesman.

Scenarios

1

Ion keeps all four Boston branches open through 2027

Likely Resolves by Nov 2, 2027

Discussed by: Banker & Tradesman reporting on Ion's branch footprint

The merger adds four Boston branches to Ion's network. If Ion follows its stated focus on community banking, it would keep the Charlestown, Jamaica Plain, Roslindale and West Roxbury locations open. A closure or consolidation would signal a different integration strategy.

2

Ion announces another Massachusetts bank acquisition by end of 2027

Possible Resolves by End of 2027

Discussed by: Banker & Tradesman reporting on Ion's expansion strategy

Ion entered New Jersey in 2024 and Massachusetts in 2026. Another deal would extend that pattern. It would require a target, regulatory approval and a public announcement.

3

The Cooperative Bank name disappears from Boston branches by 2028

Possible Resolves by Nov 2, 2028

Discussed by: Banker & Tradesman reporting on the division structure

Ion says The Cooperative Bank will continue as a division. Over time, banks often fold acquired brands into the parent name. If the name remains on signage and the website, the division structure holds.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

September 2002

Massachusetts Co-operative Bank and Abington Savings Bank merger (2002)

Massachusetts Co-operative Bank in Quincy merged with Abington Savings Bank under the Abington charter. The deal was part of Abington Bancorp's $17.3 million acquisition of Massachusetts Fincorp, announced in April and approved by shareholders and regulators by September.

Then

The combined bank operated under the Abington Savings Bank name.

Now

The merger was one of several consolidations among Massachusetts mutual and thrift institutions in the early 2000s.

Why this matters now

It shows that Massachusetts mutual bank mergers have a recent precedent and often preserve the acquirer's charter and name.

August 2002

Banknorth acquires Bancorp Connecticut (2002)

Maine-based Banknorth Group completed its acquisition of Southington, Connecticut-based Bancorp Connecticut. Southington Savings Bank merged into Banknorth NA under the Banknorth name.

Then

The Connecticut bank became part of a larger regional bank.

Now

Cross-state consolidation continued among New England savings institutions.

Why this matters now

Ion's move into Massachusetts follows a long pattern of New England banks expanding across state lines.

Sources

(9)
+3
Banker & Tradesman The Cooperative Bank Federal Reserve Bank of Boston Ion Bank Massachusetts Office of Consumer Affairs and Business Regulation Commonwealth of Massachusetts Bulletin Newspapers Wisevoter Bulletin Newspapers