HERITAGE FINANCIAL CORP /WA/

Our critical accounting estimates are described in detail in the "Critical Accounting Estimates" section within Item 7 of our 2025 Annual Form 10-K. The SEC defines "critical accounting estimates" as those that require application of management's most difficult, subjective or complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain and may change in future periods. The Company's critical accounting estimates include estimates of the ACL on loans and goodwill.

As a result of the recent acquisition of Olympic, the Company identified a new critical accounting estimate related to the fair value measurement of assets acquired and liabilities assumed. Management believes the estimates and assumptions used in determining these fair values, particularly for loans, intangible assets, and goodwill, are significant to understanding the Company's financial condition and results of operations. These estimates require complex and subjective judgments, and accordingly, management considers them to be critical accounting estimates.