Isabella Bank Corp (ISBA) · Oct 29, 2026 · Earnings

Isabella Bank earnings miss as merger costs blunt record quarter

Miss — Diluted EPS $0.86 vs ~$0.92 consensus

Isabella Bank’s Q3 earnings show widening margins and stronger deposits, but merger costs pushed EPS below consensus ahead of the Grand River close.

Isabella Bank is a Michigan community bank trying to expand beyond its Mid-Michigan base through the Grand River acquisition, which would add roughly $512 million of assets and extend its footprint into the Grand Rapids market. The transaction’s approvals and November 2, 2026 closing date were already disclosed on October 6, so this filing mainly adds the quarterly operating scorecard rather than new merger information.

The headline result missed a modest published bar. Diluted EPS was $0.86 versus a published consensus of approximately $0.92, despite net income rising 26% year over year to $6.6 million. The shortfall was not a collapse in core revenue: merger-related costs were $672,000 in the quarter, while total noninterest expenses rose to $15.6 million from $14.0 million.

FigureQ3 2026Q3 2025Consensus
Diluted EPS (Consolidated Statements of Income)$0.86$0.71~$0.92
Adjusted revenue (Reconciliation of Non-GAAP Measures)$24.2M$20.7M~$23.9M
Net interest margin, FTE (Selected Financial Data)3.71%3.15%
Total deposits (Consolidated Balance Sheets)$1,892.6M$1,925.6M
Nonperforming loans / total loans (Selected Financial Data)0.49%0.24%

The core banking engine improved materially. Net interest margin expanded to 3.71% from 3.15%, as loan yields rose and the cost of interest-bearing liabilities fell; deposits also increased $73 million sequentially, led by money-market balances. This is the strongest part of the release and suggests the pre-acquisition franchise is generating better spread income before Grand River is added.

The balance-sheet and credit picture is more mixed than the “record quarter” framing. Loans were essentially flat because commercial and residential real-estate growth was offset by shrinking mortgage-broker and consumer balances, while nonaccrual loans rose to $7.5 million from $4.6 million at year-end. The bank is still well capitalized, but nonperforming loans doubled from the prior-year quarter to 0.49% of loans and the securities portfolio carried $21.7 million of unrealized losses, up from $9.9 million at December 31, 2025.

The acquisition is now operationally imminent, not newly de-risked. Required approvals are in hand and the planned November 2 closing remains on track, but the filing gives no new quantified synergy or integration update; merger expenses are already weighing on earnings, and the more important test shifts to combining the two banks without deposit or customer attrition. The expected combined company would have about $2.8 billion of assets and 33 locations across nine Michigan counties.

Bottom line: This was a core-margin and deposit-growth win wrapped in an earnings miss. The business is improving before the merger, but elevated expenses and rising problem loans make the near-term story more complicated than the record-profit headline suggests.

What to watch next

Grand River merger closing, November 2, 2026

Original filing on SEC EDGAR

More Isabella Bank Corp news

Isabella Bank earnings miss as merger costs blunt record quarter | ISBA Stock News
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