Ion Bank completes purchase of Boston's The Cooperative Bank

Overview

Updated 2 hours ago

Ion Bank has completed its merger with The Cooperative Bank, a Boston mutual lender with branches in Charlestown, Jamaica Plain, Roslindale and West Roxbury. The Cooperative Bank will continue to operate as a division of the Connecticut bank.

The deal brings Ion into Massachusetts for the first time and gives it 36 branches across Connecticut, Massachusetts and New Jersey. Ion also acquired NVE Bank in Bergen County, New Jersey, in 2024, and the combined bank now has $3.4 billion in assets and $2.3 billion in deposits. The merger also creates a $2.5 million charitable foundation for the Massachusetts communities The Cooperative Bank serves.

Why it matters

The deal turns a century-old Boston mutual bank into a division of a Connecticut lender, adding four city branches to Ion's 36-branch network.

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Key Indicators

$3.4B

Ion Bank total assets

After the merger, according to Banker & Tradesman.

$2.3B

Ion Bank deposits

Third-quarter Federal Deposit Insurance Corporation (FDIC) call report cited by Banker & Tradesman.

Ion Bank branches

Across Connecticut, Massachusetts and New Jersey.

Boston branches

Charlestown, Jamaica Plain, Roslindale and West Roxbury.

$2.5M

Charitable foundation contribution

Initial contribution for communities served by The Cooperative Bank.

Voices

Curated perspectives — historical figures and your fellow readers.

People Involved

David Rotatori

President and Chief Executive Officer, Ion Bank

Leads Ion Bank after the merger

John Battaglia

President and Chief Executive Officer, The Cooperative Bank division

Joined Ion Bank; leads The Cooperative Bank division and sits on its boards

Organizations Involved

Ion Bank

Mutual bank

Acquirer; parent of The Cooperative Bank division

Naugatuck, Connecticut-based mutual bank with 36 branches in Connecticut, Massachusetts and New Jersey.

The Cooperative Bank

Community bank

Now a division of Ion Bank

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

Timeline

2024 November 2026

2 events Latest: Today

November 2026
Ion Bank completes merger with The Cooperative Bank
Today Merger

The Boston bank becomes a division of the Connecticut lender; Ion enters Massachusetts for the first time.
Today
2024
Ion Bank acquires NVE Bank in New Jersey
Expansion

The deal was Ion's first expansion outside central Connecticut, according to Banker & Tradesman.
2024

Scenarios

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.

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.

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.