BANNER CORP

Our primary monitoring tool for assessing interest rate risk is asset/liability simulation modeling, which is designed to capture the dynamics of balance sheet, interest rate and spread movements and to quantify variations in net interest income resulting from those movements under different rate environments. The sensitivity of net interest income to changes in the modeled interest rate environments provides a measurement of interest rate risk. We also utilize economic value analysis, which addresses changes in estimated net economic value of equity arising from changes in the level of interest rates. The net economic value of equity is estimated by separately valuing our assets and liabilities under varying interest rate environments. The extent to which assets gain or lose value in relation to the gains or losses of liability values under the various interest rate assumptions determines the sensitivity of net economic value to changes in interest rates and provides an additional measure of interest rate risk.

We perform an interest rate sensitivity analysis that incorporates beginning-of-the-period rate, balance and maturity data, using various levels of aggregation of that data, as well as certain assumptions concerning the maturity, repricing, amortization and prepayment characteristics of loans and other interest-earning assets and the repricing and withdrawal of deposits and other interest-bearing liabilities into an asset/liability simulation model. The interest rate sensitivity analysis includes a rate ramp sensitivity scenario, which assumes a gradual change in market interest rates at all maturities during the first year, as well as a rate shock interest rate sensitivity scenario, which assumes an instantaneous and sustained uniform change in market interest rates at all maturities. We update and prepare simulation modeling at least quarterly for review by senior management and oversight by the Board of Directors. We believe the data and assumptions are realistic representations of our portfolio and possible outcomes under the various interest rate scenarios. Nonetheless, the interest rate sensitivity of our net interest income and net economic value of equity could vary substantially if different assumptions were used or if actual experience differs from the assumptions used.

The following tables set forth, as of September 30, 2026, the estimated changes in our net interest income over one-year and two-year time horizons for our rate ramp and rate shock interest rate sensitivity scenarios, and the estimated changes in economic value of equity for our rate shock interest rate sensitivity scenario based on the indicated interest rate environments (dollars in thousands):

Interest Rate Risk Indicators - Rate Ramp

(1)Assumes a gradual change in market interest rates at all maturities during the first year; however, no rates are allowed to go below zero.

Interest Rate Risk Indicators - Rate Shock

(1)Assumes an instantaneous and sustained uniform change in market interest rates at all maturities; however, no rates are allowed to go below zero.

At September 30, 2026, the Company’s interest rate risk profile reflected a moderately asset-sensitive position in the near term, with net interest income projected to increase under rising rate scenarios and decrease under falling rate scenarios. In contrast, the estimated long-term economic value of the balance sheet was more sensitive to interest rate changes, declining under rising rate scenarios and changing less under falling rate scenarios. Overall, the results indicate that near-term earnings are expected to benefit from higher interest rates, while the long-term economic value of equity is more sensitive to market rate movements.

Another monitoring tool for assessing interest rate risk is gap analysis. The matching of the repricing characteristics of assets and liabilities may be analyzed by examining the extent to which assets and liabilities are interest sensitive and by monitoring an institution’s interest sensitivity gap. An asset or liability is said to be interest sensitive within a specific time period if it will mature or reprice within that time period. The interest rate sensitivity gap is defined as the difference between the amount of interest-earning assets anticipated, based upon certain assumptions, to mature or reprice within a specific time period and the amount of interest-bearing liabilities anticipated to mature or reprice, based upon certain assumptions, within that same time period. A gap is considered positive when the amount of interest-sensitive assets exceeds the amount of interest-sensitive liabilities. A gap is considered negative when the amount of interest-sensitive liabilities exceeds the amount of interest-sensitive assets. Generally, during a period of rising rates, a negative gap would tend to adversely affect net interest income while a positive gap would tend to result in an increase in net interest income. During a period of falling interest rates, a negative gap would tend to result in an increase in net interest income while a positive gap would tend to adversely affect net interest income.

Certain shortcomings are inherent in gap analysis. For example, although certain assets and liabilities may have similar maturities or periods of repricing, they may react in different degrees to changes in market rates. Also, the interest rates on certain types of assets and liabilities may fluctuate in advance of changes in market rates, while interest rates on other types may lag behind changes in market rates. Additionally, certain assets, such as adjustable-rate mortgage loans, have features that restrict changes in interest rates on a short-term basis and over the life of the asset. Further, in the event of a change in interest rates, prepayment and early withdrawal levels would likely deviate significantly from those assumed in calculating the table. Finally, the ability of some borrowers to service their debt may decrease in the event of a severe change in market rates.

The following table presents our interest sensitivity gap between interest-earning assets and interest-bearing liabilities at September 30, 2026 (dollars in thousands), based on the amounts of interest-earning assets and interest-bearing liabilities which are anticipated by us, based upon certain assumptions, to reprice or mature in each of the future periods shown. At September 30, 2026, total interest-earning assets maturing or repricing within one year exceeded total interest-bearing liabilities maturing or repricing in the same time period by $3.51 billion, representing a one-year cumulative gap to total assets ratio of 19.42%. Both the interest rate risk indicators and interest sensitivity gaps as of September 30, 2026, were within our internal policy guidelines, and Management believes the current level of interest rate risk to be reasonable.

(Footnotes on following page)

Footnotes for Table of Interest Sensitivity Gap

(1)Adjustable-rate assets are included in the period in which interest rates are next scheduled to adjust rather than in the period in which they are due to mature, and fixed-rate assets are included in the period in which they are scheduled to be repaid based upon scheduled amortization, in each case adjusted to take into account estimated prepayments. Mortgage loans and other loans are not reduced for allowances for credit losses and non-performing loans. Mortgage loans, mortgage-backed securities, other loans and investment securities are not adjusted for deferred fees or unamortized acquisition premiums and discounts.

(2)Adjustable-rate liabilities are included in the period in which interest rates are next scheduled to adjust rather than in the period they are due to mature. Although regular savings, demand, interest checking, and money market deposit accounts are subject to immediate withdrawal, based on historical experience Management considers a substantial amount of such accounts to be core deposits having significantly longer maturities. For the purpose of the gap analysis, these accounts have been assigned decay rates to reflect their longer effective maturities. If all of these accounts had been assumed to be short-term, the one-year cumulative gap of interest-sensitive assets would have been a negative $3.9 billion, or negative 21.36% of total assets, at September 30, 2026.