PR Newswire | Oct 28, 2021 09:04AM EDT

10/28 08:00 CDT

Columbia Banking System Announces Third Quarter 2021 Results TACOMA, Wash., Oct. 28, 2021

TACOMA, Wash., Oct. 28, 2021 /PRNewswire/ --

Notable Items for Third Quarter 2021

* Quarterly net income of $53.0 million and diluted earnings per share of $0.74 * Total loans, net of PPP loans, increased $183.2 million, or 8% annualized1 * Strong loan production of $366.2 million * Deposits increased $608.0 million, or 16% annualized * Net interest margin of 3.17%, an increase of 1 basis point from the linked quarter * Nonperforming assets to period-end assets ratio decreased to 0.13% * Loan balances subject to deferral declined 20% from June 30, 2021

Clint Stein, President and Chief Executive Officer of Columbia Banking System, Inc. ("Columbia", "we" or "us") and Columbia Bank (the "Bank") (NASDAQ: COLB), said today upon the release of Columbia's third quarter 2021 earnings, "Third quarter performance was very good on all fronts. Our bankers worked hard to serve our clients, which directly translated into robust balance sheet growth, improved credit quality, expanding pipelines, stable noninterest income and well-controlled expenses."

Balance Sheet

Total assets at September 30, 2021 were $18.60 billion, an increase of $589.0 million from the linked quarter. Loans were $9.52 billion, down $171.7 million from June 30, 2021 as loan originations of $366.2 million were offset by loan payments. Total Paycheck Protection Program ("PPP") loans decreased from $691.9 million at June 30, 2021 to $337.0 million at September 30, 2021. The remaining PPP loans balance consisted of $53.8 million from the first round in 2020 and $283.2 million from the second round in 2021. Debt securities in total were $6.91 billion, an increase of $692.3 million from $6.21 billion at June 30, 2021. The increase was mostly a result of purchases during the quarter partially offset by principal paydowns. Total deposits at September 30, 2021 were $15.95 billion, an increase of $608.0 million from June 30, 2021 largely due to an increase in demand and other noninterest-bearing deposits. The deposit mix remained fairly consistent from June 30, 2021 with 50% noninterest-bearing and 50% interest-bearing.

Chris Merrywell, Columbia's Executive Vice President and Chief Operating Officer, stated, "We won new business during the quarter expanding both loans and deposits, with non-PPP loan and total deposit annualized growth of 8% and 16%, respectively. This success can be attributed to our bankers commitment and client-centered approach of understanding the goals of each client and the nuances of the markets where they operate."

Income Statement

Net Interest Income

Net interest income for the third quarter of 2021 was $132.5 million, an increase of $7.1 million from the linked quarter and an increase of $7.8 million from the prior-year period. The increase from the linked quarter was primarily due to higher loan interest income, which was impacted by substantial PPP loan forgiveness and payoffs, and an increase in interest income from securities mainly due to higher average balances. The increase in net interest income from the prior year period was mainly due to an increase in interest income for securities, which was due to higher average balances. For additional information regarding net interest income, see the "Net Interest Margin" section and the "Average Balances and Rates" tables.

Provision for Credit Losses

Columbia recorded no provision for credit losses for the third quarter of 2021 compared to a net provision recovery of $5.5 million for the linked quarter and a net provision of $7.4 million for the comparable quarter in 2020.

Andy McDonald, Columbia's Executive Vice President and Chief Credit Officer, commented, "We are very pleased that credit quality remained stable in spite of the COVID-19 Delta variant and other disruptions in the economy. All of our credit metrics improved, which offset any additional provision requirements from loan growth during the quarter. While we remain watchful of the impact of inflation, labor shortages and supply chain disruption on our clients' revenue streams, we are confident in the resiliency and strength of the overall loan portfolio."

Noninterest Income

Noninterest income was $24.0 million for the third quarter of 2021, an increase of $1.2 million from the linked quarter and an increase of $1.5 million from the third quarter of 2020. The increase compared to the linked quarter was due to a $750 thousand gain related to the sale of our health savings accounts to a third party recorded to other noninterest income as well as higher loan revenue. The increase in noninterest income during the third quarter of 2021 compared to the same quarter in 2020 was a result of the previously stated sale of health savings accounts as well as higher card revenue and financial services revenue partially offset by a decrease in mortgage banking due to a decrease in the mortgage pipeline and total volume of funded loans.

Noninterest Expense

Total noninterest expense for the third quarter of 2021 was $90.0 million, an increase of $5.9 million compared to the second quarter of 2021, mainly due to a increases in legal and professional fees, compensation and employee benefits expense and data processing and software. The increase in legal and professional fees is primarily due to acquisition-related professional services associated with our acquisition of Merchants Bank of Commerce. Total acquisition-related expenses for the quarter were $2.2 million. The increase in compensation and employee benefits expense was mostly attributable to higher labor costs in the second quarter of 2021 related to the origination of PPP loans. Such labor costs, rather than recognized in the period incurred, are capitalized and amortized as a reduction to interest income over the life of the loan.

Compared to the third quarter of 2020, noninterest expense increased $4.9 million, mostly attributable to increases in legal and professional fees and data processing and software expense. The increase in legal and professional fees is due to the acquisition-related professional services associated with our acquisition of Merchants Bank of Commerce.

The provision for unfunded loan commitments, a component of other noninterest expense, for the periods indicated are as follows:

Net Interest Margin

Three Months Ended Nine Months Ended

SeptemberJune SeptemberSeptemberSeptember 30, 30, 30, 30, 30,

2021 2021 2020 2021 2020



(in thousands)

Provision for unfunded $ 500 $200$ 800 $2,200 $4,600 loan commitments



Columbia's net interest margin (tax equivalent) for the third quarter of 2021 was 3.17%, an increase of 1 basis point from the linked quarter and a decrease of 30 basis points from the prior-year period. The increase in the net interest margin (tax equivalent) compared to the linked quarter was due to an increase in loan yields, which was impacted by substantial PPP loan forgiveness and payoffs, partially offset by lower yields on securities. The average cost of total deposits for both the third and linked quarter of 2021 was 4 basis points. The decrease in the net interest margin (tax equivalent) compared to the prior-year period was driven by lower average rates on securities and a higher ratio of taxable securities to our overall interest-earning assets, which was partially offset by higher loan yields, impacted by substantial PPP loan forgiveness and payoffs. For additional information regarding net interest margin, see the "Average Balances and Rates" tables.

Columbia's operating net interest margin (tax equivalent)2 was 3.16% for the third quarter of 2021, which increased 1 basis point from the linked quarter and decreased 30 basis points compared to the prior-year period. The increase in the operating net interest margin for the third quarter of 2021 compared to the linked quarter and the decrease compared to the prior-year period were due to the items noted in the preceding paragraph.

The following table highlights the yield on our PPP loans for the periods indicated:

Three Months Ended Nine Months Ended

September June 30, September September September 30, 30, 30, 30,

2021 2021 2020 2021 2020



Paycheck Protection (dollars in thousands) Program loans

Interest $11,155 $7,075 $5,263 $27,327 $9,853 income

Average $495,879 $831,660 $948,034 $719,071 $533,702 balance

Yield 8.92 %3.41 %2.21 %5.08 %2.47 %

Aaron James Deer, Columbia's Executive Vice President and Chief Financial Officer, stated, "Despite the continued pressure from the low-rate environment, our strong earning asset growth, supported by core deposit inflows, supports a solid outlook for net interest income. Moreover, as interest rates move toward more normal levels, we expect our margin to quickly benefit from new production and the repricing of existing loans."

Asset Quality

At September 30, 2021, nonperforming assets to total assets decreased to 0.13% compared to 0.14% at June 30, 2021. Total nonperforming assets increased $155 thousand from the linked quarter, primarily due to increases in commercial business and one-to-four family residential nonaccrual loans, partially offset by a decrease in agriculture nonaccrual loans.

The following table sets forth information regarding nonaccrual loans and total nonperforming assets:

September 30, June 30, December 31, 2021 2021 2020



(in thousands)

Nonaccrual loans:

Commercial loans:

Commercial real estate $ 2,871 $3,019 $ 7,712

Commercial business 12,105 10,745 13,222

Agriculture 7,706 9,034 11,614

Construction - - 217

Consumer loans:

One-to-four family residential 1,491 1,179 2,001 real estate

Other consumer 3 44 40

Total nonaccrual loans 24,176 24,021 34,806

OREO and other personal property381 381 553 owned

Total nonperforming assets $ 24,557 $24,402 $ 35,359

Nonperforming assets to total loans were 0.25% at both September 30, 2021 and June 30, 2021.

The following table provides an analysis of the Company's allowance for credit losses:

Three Months Ended Nine Months Ended

September June 30, September September September 30, 30, 30, 30,

2021 2021 2020 2021 2020



(in thousands)

Beginning balance $142,988$148,294$151,546$149,140$83,968

Impact of adopting- - - - 1,632 ASC 326

Charge-offs:

Commercial loans:

Commercial real - (316) - (316) (101) estate

Commercial (1,183) (971) (3,164) (5,493) (10,290) business

Agriculture - (122) (1,269) (122) (5,995)

Consumer loans:

One-to-four family residential real - (146) (16) (146) (26) estate

Other consumer (296) (385) (133) (808) (599)

Total charge-offs (1,479) (1,940) (4,582) (6,885) (17,011)

Recoveries:

Commercial loans:

Commercial real 518 16 65 570 92 estate

Commercial 328 874 1,124 4,416 2,795 business

Agriculture 6 5 27 23 69

Construction 8 521 11 575 688

Consumer loans:

One-to-four family residential real 203 503 1,301 757 2,005 estate

Other consumer 213 215 76 489 330

Total recoveries 1,276 2,134 2,604 6,830 5,979

Net (charge-offs) (203) 194 (1,978) (55) (11,032) recoveries

Provision (recapture) for - (5,500) 7,400 (6,300) 82,400 credit losses

Ending balance $142,785$142,988$156,968$142,785$156,968

The allowance for credit losses to period-end loans was 1.50% at September 30, 2021 compared to 1.48% at June 30, 2021. Excluding PPP loans, the allowance for credit losses to period-end loans3 was 1.55% at September 30, 2021 compared to 1.59% at June 30, 2021.

Loan Deferrals

The following table shows the loan balances subject to deferral for the periods indicated:

September 30, June 30, December 31, 2021 2021 2020



(in thousands)

Loan balances subject to $ 32,796 $40,747 $146,725 deferral



Organizational Update

On October 12, 2021, Columbia Banking System, Inc. and Umpqua Holdings Corporation jointly announced a definitive agreement to combine, creating the second largest regionally focused bank by market share on the West Coast with assets exceeding $50 billion. This partnership creates a broad network of more than 300 locations across Washington, Oregon, Idaho, California and Nevada under the Umpqua brand with wealth management services and products offered under the Columbia brand. The name of our parent company will remain Columbia Banking System, Inc. and our stock will continue to be traded under the "COLB" symbol.

This announcement follows Columbia's first expansion into the California market with the completion of its acquisition of Bank of Commerce, Holdings ("Bank of Commerce"), the parent company of Merchants Bank of Commerce on October 1, 2021.

Mr. Stein commented, "We are delighted to welcome Merchant's clients and employees to the Columbia Bank family. Furthermore, we are excited to announce the partnership between Columbia and Umpqua, which will position us as the preferred bank for businesses and families across the West. Both transactions are consistent with our community bank values and our unwavering commitment to our team members, clients and communities."

Conference Call Information

Columbia's management will discuss the third quarter 2021 financial results on a conference call scheduled for Thursday, October 28, 2021 at 10:00 a.m. Pacific Time (1:00 p.m. ET). Interested parties may join the live-streamed event by using the site: https://edge.media-server.com/mmc/p/y8vfuseb

The conference call can also be accessed on Thursday, October 28, 2021 at 10:00 a.m. Pacific Time (1:00 p.m. ET) by calling 833-301-1160; Conference ID password: 9970936.

A replay of the call will be accessible beginning Friday, October 29, 2021 using the link below: https://edge.media-server.com/mmc/p/y8vfuseb

About Columbia

Headquartered in Tacoma, Washington, Columbia Banking System, Inc. (NASDAQ: COLB) is the holding company of Columbia Bank, a Washington state-chartered full-service commercial bank with locations throughout Washington, Oregon and Idaho. The bank has been named one of Puget Sound Business Journal's"Washington's Best Workplaces," more than 10 times and was ranked #1 in Customer Satisfaction with Retail Banking in the Northwest region by J.D. Power4in the 2020 U.S. Retail Banking Satisfaction Study. Columbia was named the #1 bank in the Northwest on the Forbes 2020 list of "America's Best Banks," marking nearly 10 consecutive years on the publication's list of top financial institutions.

More information about Columbia can be found on its website at www.columbiabank.com.

Total loans, net of PPP loans is a non-GAAP measure. See the section titled1 "Non-GAAP Financial Measures" in this earnings release for a reconciliation of total loans to total loans, net of PPP loans.

Operating net interest margin (tax equivalent) is a non-GAAP financial2 measure. See the section titled "Non-GAAP Financial Measures" in this earnings release for the reconciliation of operating net interest margin (tax equivalent) to net interest margin.

Allowance for credit losses to period-end loans, excluding PPP loans is a non-GAAP financial measure. See the section titled "Non-GAAP Financial3 Measures" in this earnings release for the reconciliation of allowance for credit losses to period-end loans to allowance for credit losses to period-end loans, excluding PPP loans.

Columbia Bank received the highest score in the Northwest region of the J.D.4 Power 2020 U.S. Retail Banking Satisfaction Study of customer satisfaction with their own retail bank.

Note Regarding Forward-Looking Statements

This news release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include, but are not limited to, descriptions of Columbia's management's expectations regarding future events and developments such as future operating results, growth in loans and deposits, continued success of Columbia's style of banking and the strength of the local economy as well as the potential effects of the COVID-19 pandemic on Columbia's business, operations, financial performance and prospects. The words "will," "believe," "expect," "intend," "should," and "anticipate" or the negative of these words or words of similar construction are intended in part to help identify forward-looking statements. Future events are difficult to predict, and the expectations described above are necessarily subject to risks and uncertainties, many of which are outside our control, that may cause actual results to differ materially and adversely. In addition to discussions about risks and uncertainties set forth from time to time in Columbia's filings with the Securities and Exchange Commission (the "SEC"), available at the SEC's website at www.sec.gov and the Company's website at www.columbiabank.com, including the "Risk Factors," "Business" and "Management's Discussion and Analysis of Financial Condition and Results of Operations" sections of our annual reports on Form 10-K and quarterly reports on Form 10-Q (as applicable), factors that may cause actual results to differ materially from those contemplated by such forward-looking statements include, among others, the following:

* national and global economic conditions could be less favorable than expected or could have a more direct and pronounced effect on us than expected and adversely affect our ability to continue internal growth and maintain the quality of our earning assets; * the markets where we operate and make loans could face challenges; * the risks presented by the economy, which could adversely affect credit quality, collateral values, including real estate collateral, investment values, liquidity and loan originations and loan portfolio delinquency rates; * risks related to the proposed merger with Umpqua Holdings Corporation ("Umpqua") including, among others, (i) failure to complete the merger with Umpqua or unexpected delays related to the merger or either party's inability to obtain regulatory or shareholder approvals or satisfy other closing conditions required to complete the merger, (ii) regulatory approvals resulting in the imposition of conditions that could adversely affect the combined company or the expected benefits of the transaction, (iii) certain restrictions during the pendency of the proposed transaction with Umpqua that may impact the parties' ability to pursue certain business opportunities or strategic transactions, (iv) diversion of management's attention from ongoing business operations and opportunities, (v) cost savings and any revenue synergies from the merger may not be fully realized or may take longer than anticipated to be realized, (vi) the integration of each party's management, personnel and operations will not be successfully achieved or may be materially delayed or will be more costly or difficult than expected, (vii) deposit attrition, customer or employee loss and/or revenue loss as a result of the announcement of the proposed merger, (viii) expenses related to the proposed merger being greater than expected, and (ix) shareholder litigation that could prevent or delay the closing of the proposed merger or otherwise negatively impact the Company's business and operations; * the efficiencies and enhanced financial and operating performance we expect to realize from investments in personnel, acquisitions (including the recent acquisition of Bank of Commerce Holdings ("Bank of Commerce Holdings")) and infrastructure may not be realized; * the ability to successfully integrate Bank of Commerce, or to integrate future acquired entities; * interest rate changes could significantly reduce net interest income and negatively affect asset yields and funding sources; * the effect of the discontinuation or replacement of LIBOR; * results of operations following strategic expansion, including the impact of acquired loans on our earnings, could differ from expectations; * changes in the scope and cost of FDIC insurance and other coverages; * changes in accounting policies or procedures as may be required by the Financial Accounting Standards Board or other regulatory agencies could materially affect our financial statements and how we report those results, and expectations and preliminary analysis relating to how such changes will affect our financial results could prove incorrect; * changes in laws and regulations affecting our businesses, including changes in the enforcement and interpretation of such laws and regulations by applicable governmental and regulatory agencies; * increased competition among financial institutions and nontraditional providers of financial services; * continued consolidation in the Northwest financial services industry resulting in the creation of larger financial institutions that have greater resources could change the competitive landscape; * the goodwill we have recorded in connection with acquisitions could become impaired, which may have an adverse impact on our earnings and capital; * our ability to identify and address cyber-security risks, including security breaches, "denial of service attacks," "hacking" and identity theft; * any material failure or interruption of our information and communications systems; * inability to keep pace with technological changes; * our ability to effectively manage credit risk, interest rate risk, market risk, operational risk, legal risk, liquidity risk and regulatory and compliance risk; * failure to maintain effective internal control over financial reporting or disclosure controls and procedures; * the effect of geopolitical instability, including wars, conflicts and terrorist attacks; * our profitability measures could be adversely affected if we are unable to effectively manage our capital; * natural disasters, including earthquakes, tsunamis, flooding, fires and other unexpected events; * the effect of COVID-19 and other infectious illness outbreaks that may arise in the future, which has created significant impacts and uncertainties in U.S. and global markets; * changes in governmental policy and regulation, including measures taken in response to economic, business, political and social conditions, including with regard to COVID-19; and * the effects of any damage to our reputation resulting from developments related to any of the items identified above.

Additional factors that could cause results to differ materially from those described above can be found in Columbia's Annual Report on Form 10-K for the year ended December 31, 2020, its Quarterly Reports on Form 10-Q for the three-month periods ended March 31, 2021 and June 30, 2021, which are on file with the SEC and available on Columbia's website, www.columbiabank.com, under the heading "Financial Information" and in other documents Columbia files with the SEC, and in Umpqua's Annual Report on Form 10-K for the year ended December 31, 2020 and its Quarterly Reports on Form 10-Q for the three-month periods ended March 31, 2021 and June 30, 2021, which are on file with the SEC and available on Umpqua's investor relations website, www.umpquabank.com, under the heading "Financials," and in other documents Umpqua files with the SEC.

We believe the expectations reflected in our forward-looking statements are reasonable, based on information available to us on the date hereof. However, given the described uncertainties and risks, we cannot guarantee our future performance or results of operations and you should not place undue reliance on these forward-looking statements which speak only as of the date hereof. Neither Columbia nor Umpqua assumes any obligation to update forward-looking statements to reflect circumstances or events that occur after the date the forward-looking statements were made or to reflect the occurrence of unanticipated events except as required by federal securities laws.

IMPORTANT ADDITIONAL INFORMATION AND WHERE TO FIND IT

In connection with the proposed transaction (the "Transaction"), Columbia will file with the SEC a Registration Statement on Form S-4 that will include a Joint Proxy Statement of Umpqua and Columbia and a Prospectus of Columbia, as well as other relevant documents concerning the Transaction. Certain matters in respect of the Transaction involving Umpqua and Columbia will be submitted to Umpqua's and Columbia's shareholders for their consideration. This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval, nor shall there be any sale of securities, in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. INVESTORS AND SHAREHOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT AND THE JOINT PROXY STATEMENT/PROSPECTUS REGARDING THE TRANSACTION WHEN THEY BECOME AVAILABLE AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE TRANSACTION, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Shareholders will be able to obtain a free copy of the definitive joint proxy statement/prospectus, as well as other filings containing information about Umpqua and Columbia, without charge, at the SEC's website, www.sec.gov. Copies of the joint proxy statement/prospectus and the filings with the SEC that will be incorporated by reference in the joint proxy statement/prospectus can also be obtained, without charge, by directing a request to Umpqua Holdings Corporation, Attention: Andrew Ognall, One SW Columbia Street, Suite 1200, Portland, OR 97204, 503-727-4100 or to Columbia Banking System, Inc., Attention: Investor Relations, P. O. Box 2156, MS 3100, Tacoma, WA 98401-2156, 253-471-4065.

PARTICIPANTS IN THE SOLICITATION

Umpqua, Columbia, and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the shareholders of Umpqua and Columbia in connection with the Transaction under the rules of the SEC. Information regarding Umpqua's directors and executive officers is available in Umpqua's definitive proxy statement relating to its 2021 Annual Meeting of Shareholders, which was filed with the SEC on March 5, 2021, and other documents filed by Umpqua with the SEC. Information regarding Columbia's directors and executive officers is available in Columbia's definitive proxy statement relating to its 2021 Annual Meeting of Shareholders, which was filed with the SEC on April 12, 2021, and other documents filed by Columbia with the SEC. Other information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the joint proxy statement/prospectus relating to the Transaction. Free copies of this document may be obtained as described in the preceding paragraph.

Contacts:Clint Stein, Aaron James Deer,

President and Executive Vice President and

Chief Executive Officer Chief Financial Officer



Investor Relations

InvestorRelations@columbiabank.com

253-471-4065

(COLB-ER) (COLB&ER)

CONSOLIDATED BALANCE SHEETS

Columbia Banking System, Inc.

Unaudited September 30,June 30, December 31,

2021 2021 2020



(in thousands)

ASSETS

Cash and due from banks $193,715 $218,649 $218,899

Interest-earning deposits 703,760 612,883 434,867 with banks

Total cash and cash 897,475 831,532 653,766 equivalents

Debt securities available for sale at fair value (amortized cost of $4,773,742, $4,103,196 and 4,831,919 4,190,066 5,210,134 $4,997,529, respectively)

Debt securities held to maturity at amortized cost (fair value of $2,071,051, $2,032,980 and 2,075,158 2,024,715 - $-, respectively)

Equity securities 13,425 13,425 13,425

Federal Home Loan Bank 10,280 10,280 10,280 ("FHLB") stock at cost

Loans held for sale 11,355 13,179 26,481

Loans, net of 9,521,385 9,693,116 9,427,660 unearned income

Less: Allowance for credit 142,785 142,988 149,140 losses

Loans, net 9,378,600 9,550,128 9,278,520

Interest receivable 52,886 52,347 54,831

Premises and 157,488 158,827 162,059 equipment, net

Other real estate 381 381 553 owned

Goodwill 765,842 765,842 765,842

Other intangible 21,123 22,958 26,734 assets, net

Other assets 386,530 379,797 382,154

Total assets $18,602,462$18,013,477$16,584,779

LIABILITIES AND SHAREHOLDERS' EQUITY

Deposits:

Noninterest-bearing $7,971,680 $7,703,325 $6,913,214

Interest-bearing 7,981,719 7,642,107 6,956,648

Total deposits 15,953,399 15,345,432 13,869,862

FHLB advances 7,372 7,386 7,414

Securities sold under 40,040 70,994 73,859 agreements to repurchase

Subordinated 35,000 35,000 35,092 debentures

Other liabilities 243,384 221,419 250,945

Total liabilities 16,279,195 15,680,231 14,237,172

Commitments and contingent liabilities

Shareholders' equity:

SeptemberJune 30,December 30, 31,

2021 2021 2020



(in thousands)

Preferred stock (no par value)

Authorized shares 2,000 2,000 2,000

Common stock (no par value)

Authorized shares 115,000 115,000115,000

Issued 73,944 73,926 73,782 1,670,076 1,664,953 1,660,998

Outstanding 71,760 71,742 71,598

Retained earnings 651,308 642,018 575,248

Accumulated other 72,717 97,109 182,195 comprehensive income

Treasury stock at 2,184 2,184 2,184 (70,834) (70,834) (70,834) cost

Total shareholders' equity 2,323,267 2,333,246 2,347,607

Total liabilities and $18,602,462$18,013,477$16,584,779shareholders' equity

CONSOLIDATED STATEMENTS OF INCOME

Columbia Banking System, Inc.Three Months Ended Nine Months Ended

Unaudited September June 30, September September September 30, 30, 30, 30,

2021 2021 2020 2021 2020



Interest Income (in thousands except per share amounts)

Loans $105,168$99,712$105,739$305,195$318,601

Taxable securities 26,374 24,750 19,102 73,940 58,533

Tax-exempt securities 2,714 2,826 2,340 8,299 6,899

Deposits in banks 284 159 203 595 480

Total interest income 134,540 127,447 127,384 388,029 384,513

Interest Expense

Deposits 1,468 1,426 2,005 4,379 7,741

FHLB advances and Federal Reserve Bank ("FRB") 73 72 166 217 6,191 borrowings

Subordinated debentures 435 468 468 1,371 1,404

Other borrowings 24 19 19 66 178

Total interest expense 2,000 1,985 2,658 6,033 15,514

Net Interest Income 132,540 125,462 124,726 381,996 368,999

Provision (recapture) for - (5,500) 7,400 (6,300) 82,400 credit losses

Net interest income after provision (recapture) for 132,540 130,962 117,326 388,296 286,599 credit losses

Noninterest Income

Deposit account and treasury 6,893 6,701 6,658 19,952 20,538 management fees

Card revenue 4,889 4,773 3,834 13,395 10,431

Financial services and trust 4,250 4,245 3,253 11,876 9,481 revenue

Loan revenue 5,184 4,514 6,645 17,067 16,842

Bank owned life insurance 1,585 1,635 1,585 4,780 4,799

Investment securities gains, - 314 - 314 16,674 net

Other 1,157 548 497 2,470 2,173

Total noninterest income 23,958 22,730 22,472 69,854 80,938

Noninterest Expense

Compensation and employee 54,679 53,450 55,133 159,865 156,018 benefits

Occupancy 9,695 9,038 8,734 27,739 26,743

Data processing and software 8,515 7,402 7,095 24,368 22,175 (1)

Legal and professional fees 4,894 3,264 3,000 10,973 8,585

Amortization of intangibles 1,835 1,852 2,193 5,611 6,713

Business and Occupation ("B& 1,583 1,490 1,559 4,332 3,427 O") taxes

Advertising and promotion 678 588 680 2,026 2,822

Regulatory premiums 1,214 1,112 826 3,431 1,894

Net cost (benefit) of operation of other real 4 111 (160) 52 (348) estate owned

Other (1) 6,910 5,809 6,055 19,285 22,190

Total noninterest expense 90,007 84,116 85,115 257,682 250,219

Income before income taxes 66,491 69,576 54,683 200,468 117,318

Provision for income taxes 13,474 14,537 9,949 40,559 21,374

Net Income $53,017 $55,039$44,734 $159,909$95,944

Earnings per common share

Basic $0.75 $0.77 $0.63 $2.25 $1.35

Diluted $0.74 $0.77 $0.63 $2.24 $1.35

Dividends declared per common$0.58 $0.28 $0.28 $1.14 $0.84 share - regular (2)

Dividends declared per common- - - - 0.22 share - special

Dividends declared per common$0.58 $0.28 $0.28 $1.14 $1.06 share - total



Weighted average number of 71,036 70,987 70,726 70,965 70,870 common shares outstanding

Weighted average number of diluted common shares 71,186 71,164 70,762 71,155 70,906 outstanding

(1) Prior periods adjusted to conform to current period presentation.

Dividends declared per common share - regular for the three months ended(2) September 30, 2021 includes both the July 29, 2021 declaration of $0.28 and the September 30, 2021 declaration of $0.30.

FINANCIAL STATISTICS

Columbia Banking System, Inc.Three Months Ended Nine Months Ended

Unaudited September 30, June 30, September 30, September 30, September 30,

2021 2021 2020 2021 2020



Earnings (dollars in thousands except per share amounts)

Net interest income $132,540 $125,462 $124,726 $381,996 $368,999

Provision (recapture) for $- $(5,500) $7,400 $(6,300) $82,400 credit losses

Noninterest income $23,958 $22,730 $22,472 $69,854 $80,938

Noninterest expense $90,007 $84,116 $85,115 $257,682 $250,219

Acquisition-related expense (included in noninterest $2,192 $510 $- $2,702 $- expense)

Net income $53,017 $55,039 $44,734 $159,909 $95,944

Per Common Share

Earnings (basic) $0.75 $0.77 $0.63 $2.25 $1.35

Earnings (diluted) $0.74 $0.77 $0.63 $2.24 $1.35

Book value $32.38 $32.52 $32.14 $32.38 $32.14

Tangible book value per $21.41 $21.53 $21.05 $21.41 $21.05 common share (1)

Averages

Total assets $18,330,109 $17,670,480 $15,965,485 $17,636,026 $15,039,925

Interest-earning assets $16,820,771 $16,176,328 $14,492,435 $16,143,956 $13,549,356

Loans $9,526,052 $9,664,169 $9,744,336 $9,592,178 $9,370,101

Securities, including debt securities, equity securities$6,545,134 $5,914,838 $3,948,041 $5,901,575 $3,720,268 and FHLB stock

Deposits $15,642,250 $15,059,406 $13,318,485 $14,976,661 $12,058,376

Interest-bearing deposits $7,821,949 $7,530,372 $6,527,695 $7,493,773 $5,984,658

Interest-bearing liabilities $7,920,146 $7,618,629 $6,659,119 $7,587,989 $6,516,874

Noninterest-bearing deposits $7,820,301 $7,529,034 $6,790,790 $7,482,888 $6,073,718

Shareholders' equity $2,364,149 $2,312,779 $2,293,771 $2,341,238 $2,247,228

Financial Ratios

Return on average assets 1.16 %1.25 %1.12 %1.21 %0.85 %

Return on average common 8.97 %9.52 %7.80 %9.11 %5.69 %equity

Return on average tangible 13.82 %14.84 %12.41 %14.13 %9.31 %common equity (1)

Average equity to average 12.90 %13.09 %14.37 %13.28 %14.94 %assets

Shareholders' equity to total12.49 %12.95 %14.18 %12.49 %14.18 %assets

Tangible common shareholders'8.62 %8.97 %9.76 %8.62 %9.76 %equity to tangible assets (1)

Net interest margin (tax 3.17 %3.16 %3.47 %3.21 %3.69 %equivalent)

Efficiency ratio (tax 56.67 %55.86 %56.95 %56.16 %54.78 %equivalent) (2)

Operating efficiency ratio 54.44 %54.80 %56.33 %54.84 %56.16 %(tax equivalent) (1)

Noninterest expense ratio 1.96 %1.90 %2.13 %1.95 %2.22 %

Core noninterest expense 1.92 %1.89 %2.13 %1.93 %2.22 %ratio (1)



September 30, June 30, December 31,

Period-end 2021 2021 2020

Total assets $18,602,462 $18,013,477 $16,584,779

Loans, net of unearned income$9,521,385 $9,693,116 $9,427,660

Allowance for credit losses $142,785 $142,988 $149,140

Securities, including debt securities, equity securities$6,930,782 $6,238,486 $5,233,839 and FHLB stock

Deposits $15,953,399 $15,345,432 $13,869,862

Shareholders' equity $2,323,267 $2,333,246 $2,347,607

Nonperforming assets

Nonaccrual loans $24,176 $24,021 $34,806

Other real estate owned ("OREO") and other personal 381 381 553 property owned ("OPPO")

Total nonperforming assets $24,557 $24,402 $35,359



Nonperforming loans to 0.25 %0.25 %0.37 % period-end loans

Nonperforming assets to 0.13 %0.14 %0.21 % period-end assets

Allowance for credit losses 1.50 %1.48 %1.58 % to period-end loans

Net loan charge-offs (recoveries) (for the three $203 $(194) $3,128 months ended)

This is a non-GAAP measure. See section titled "Non-GAAP Financial(1) Measures" on the last three pages of this earnings release for a reconciliation to the most comparable GAAP measure.

(2) Noninterest expense divided by the sum of net interest income on a tax equivalent basis and noninterest income on a tax equivalent basis.

QUARTERLY FINANCIAL STATISTICS

Columbia Banking System, Inc.Three Months Ended

Unaudited September 30, June 30, March 31, December 31, September 30,

2021 2021 2021 2020 2020



Earnings (dollars in thousands except per share amounts)

Net interest income $132,540 $125,462 $123,994 $131,112 $124,726

Provision (recapture) for $- $(5,500) $(800) $(4,700) $7,400 credit losses

Noninterest income $23,958 $22,730 $23,166 $23,562 $22,472

Noninterest expense $90,007 $84,116 $83,559 $84,300 $85,115

Acquisition-related expense (included in noninterest $2,192 $510 $- $- $- expense)

Net income $53,017 $55,039 $51,853 $58,300 $44,734

Per Common Share

Earnings (basic) $0.75 $0.77 $0.73 $0.82 $0.63

Earnings (diluted) $0.74 $0.77 $0.73 $0.82 $0.63

Book value $32.38 $32.52 $31.71 $32.79 $32.14

Averages

Total assets $18,330,109 $17,670,480 $16,891,682 $16,477,246 $15,965,485

Interest-earning assets $16,820,771 $16,176,328 $15,419,371 $15,010,392 $14,492,435

Loans $9,526,052 $9,664,169 $9,586,984 $9,533,655 $9,744,336

Securities, including debt securities, equity securities$6,545,134 $5,914,838 $5,230,304 $4,765,158 $3,948,041 and FHLB stock

Deposits $15,642,250 $15,059,406 $14,212,616 $13,864,027 $13,318,485

Interest-bearing deposits $7,821,949 $7,530,372 $7,121,300 $6,873,405 $6,527,695

Interest-bearing liabilities $7,920,146 $7,618,629 $7,217,471 $6,954,287 $6,659,119

Noninterest-bearing deposits $7,820,301 $7,529,034 $7,091,316 $6,990,622 $6,790,790

Shareholders' equity $2,364,149 $2,312,779 $2,346,593 $2,311,070 $2,293,771

Financial Ratios

Return on average assets 1.16 %1.25 %1.23 %1.42 %1.12 %

Return on average common 8.97 %9.52 %8.84 %10.09 %7.80 %equity

Average equity to average 12.90 %13.09 %13.89 %14.03 %14.37 %assets

Shareholders' equity to total12.49 %12.95 %13.12 %14.16 %14.18 %assets

Net interest margin (tax 3.17 %3.16 %3.31 %3.52 %3.47 %equivalent)

Period-end

Total assets $18,602,462 $18,013,477 $17,335,116 $16,584,779 $16,233,424

Loans, net of unearned income$9,521,385 $9,693,116 $9,676,318 $9,427,660 $9,688,947

Allowance for credit losses $142,785 $142,988 $148,294 $149,140 $156,968

Securities, including debt securities, equity securities$6,930,782 $6,238,486 $5,519,995 $5,233,839 $4,305,425 and FHLB stock

Deposits $15,953,399 $15,345,432 $14,767,466 $13,869,862 $13,600,260

Shareholders' equity $2,323,267 $2,333,246 $2,275,063 $2,347,607 $2,301,981

Goodwill $765,842 $765,842 $765,842 $765,842 $765,842

Other intangible assets, net $21,123 $22,958 $24,810 $26,734 $28,745

Nonperforming assets

Nonaccrual loans $24,176 $24,021 $33,581 $34,806 $47,231

OREO and OPPO 381 381 521 553 623

Total nonperforming assets $24,557 $24,402 $34,102 $35,359 $47,854



Nonperforming loans to 0.25 %0.25 %0.35 %0.37 %0.49 %period-end loans

Nonperforming assets to 0.13 %0.14 %0.20 %0.21 %0.29 %period-end assets

Allowance for credit losses 1.50 %1.48 %1.53 %1.58 %1.62 %to period-end loans

Net loan charge-offs $203 $(194) $46 $3,128 $1,978 (recoveries)

LOAN PORTFOLIO COMPOSITION

Columbia Banking System, Inc.

Unaudited September June 30, March 31, December 31,September 30, 30,

2021 2021 2021 2020 2020



Loan Portfolio Composition -(dollars in thousands) Dollars

Commercial loans:

Commercial real estate $4,088,484$4,101,071$4,081,915$4,062,313$4,027,035

Commercial business 3,436,351 3,738,288 3,792,813 3,597,968 3,836,009

Agriculture 815,985 797,580 751,800 779,627 850,290

Construction 326,569 300,303 282,534 268,663 273,176

Consumer loans:

One-to-four family 823,877 724,151 735,314 683,570 665,432 residential real estate

Other consumer 30,119 31,723 31,942 35,519 37,005

Total loans 9,521,385 9,693,116 9,676,318 9,427,660 9,688,947

Less: Allowance for credit (142,785) (142,988) (148,294) (149,140) (156,968) losses

Total loans, net $9,378,600$9,550,128$9,528,024$9,278,520$9,531,979

Loans held for sale $11,355 $13,179 $26,176 $26,481 $24,407



SeptemberJune March DecemberSeptember 30, 30, 31, 31, 30,

Loan Portfolio Composition 2021 2021 2021 2020 2020 - Percentages

Commercial loans:

Commercial real estate 42.9 % 42.3 %42.2 %43.0 %41.5 %

Commercial business 36.1 % 38.6 %39.2 %38.2 %39.6 %

Agriculture 8.6 % 8.2 %7.8 %8.3 %8.8 %

Construction 3.4 % 3.1 %2.9 %2.8 %2.8 %

Consumer loans:

One-to-four family 8.7 % 7.5 %7.6 %7.3 %6.9 % residential real estate

Other consumer 0.3 % 0.3 %0.3 %0.4 %0.4 %

Total loans 100.0% 100.0%100.0%100.0 %100.0%

DEPOSIT COMPOSITION

Columbia Banking System, Inc.

Unaudited

September 30,June 30, March 31, December 31, September 30,

2021 2021 2021 2020 2020



Deposit Composition(dollars in thousands) - Dollars

Demand and other $7,971,680 $7,703,325 $7,424,472 $6,913,214 $6,897,054 noninterest-bearing

Money market 3,076,833 2,950,063 2,913,689 2,780,922 2,708,949

Interest-bearing 1,646,816 1,525,360 1,512,808 1,433,083 1,322,618 demand

Savings 1,416,376 1,388,241 1,282,151 1,169,721 1,109,155

Interest-bearing public funds, other740,281 720,553 662,461 656,273 635,980 than certificates of deposit

Certificates of deposit, less than 190,402 193,080 198,568 201,805 204,578 $250,000

Certificates of deposit, $250,000 108,483 105,393 107,421 108,935 105,041 or more

Certificates of deposit insured by the CD Option of 26,835 24,409 25,929 23,105 22,609 IntraFi Network Deposits

Brokered certificates of 5,000 5,000 5,000 5,000 5,000 deposit

Reciprocal money 770,693 730,008 634,967 577,804 589,276 market accounts

Total deposits $15,953,399$15,345,432$14,767,466$13,869,862$13,600,260

SeptemberJune March DecemberSeptember 30, 30, 31, 31, 30,

Deposit Composition - 2021 2021 2021 2020 2020 Percentages

Demand and other 50.0 % 50.2 %50.4 %49.8 % 50.7 % noninterest-bearing

Money market 19.3 % 19.2 %19.7 %20.1 % 19.9 %

Interest-bearing demand 10.3 % 9.9 %10.2 %10.3 % 9.7 %

Savings 8.9 % 9.0 %8.7 %8.4 % 8.2 %

Interest-bearing public funds, other than 4.6 % 4.7 %4.5 %4.7 % 4.7 % certificates of deposit

Certificates of deposit, 1.2 % 1.3 %1.3 %1.5 % 1.5 % less than $250,000

Certificates of deposit, 0.7 % 0.7 %0.7 %0.8 % 0.8 % $250,000 or more

Certificates of deposit insured by the CD Option of0.2 % 0.2 %0.2 %0.2 % 0.2 % IntraFi Network Deposits

Reciprocal money market 4.8 % 4.8 %4.3 %4.2 % 4.3 % accounts

Total 100.0% 100.0%100.0%100.0% 100.0%

AVERAGE BALANCES AND RATES

Columbia Banking System, Inc.

Unaudited

Three Months Ended Three Months Ended

September 30, 2021 September 30, 2020

Average Interest AverageAverage Interest Average Balances Earned / Rate Balances Earned / Rate Paid Paid



(dollars in thousands)

ASSETS

Loans, net (1)(2) $9,526,052 $106,3454.43% $9,744,336 $106,9454.37%

Taxable securities 5,929,321 26,374 1.76% 3,511,690 19,102 2.16%

Tax exempt 615,813 3,436 2.21% 436,351 2,962 2.70% securities (2)

Interest-earning 749,585 284 0.15% 800,058 203 0.10% deposits with banks

Total interest-earning 16,820,771 136,439 3.22% 14,492,435 129,212 3.55% assets

Other earning 245,907 235,735 assets

Noninterest-earning1,263,431 1,237,315 assets

Total assets $18,330,109 $15,965,485

LIABILITIES AND SHAREHOLDERS' EQUITY

Money market $3,790,201 $741 0.08% $3,200,407 $947 0.12% accounts

Interest-bearing 1,581,598 298 0.07% 1,296,076 337 0.10% demand

Savings accounts 1,391,221 54 0.02% 1,072,472 36 0.01%

Interest-bearing public funds, other729,382 232 0.13% 621,786 397 0.25% than certificates of deposit

Certificates of 329,547 143 0.17% 336,954 288 0.34% deposit

Total interest-bearing 7,821,949 1,468 0.07% 6,527,695 2,005 0.12% deposits

FHLB advances and 7,382 73 3.92% 54,173 166 1.22% FRB borrowings

Subordinated 35,000 435 4.93% 35,161 468 5.30% debentures

Other borrowings and 55,815 24 0.17% 42,090 19 0.18% interest-bearing liabilities

Total interest-bearing 7,920,146 2,000 0.10% 6,659,119 2,658 0.16% liabilities

Noninterest-bearing7,820,301 6,790,790 deposits

Other noninterest-bearing225,513 221,805 liabilities

Shareholders' 2,364,149 2,293,771 equity

Total liabilities & shareholders' $18,330,109 $15,965,485 equity

Net interest income (tax $134,439 $126,554 equivalent)

Net interest margin (tax equivalent) 3.17% 3.47%

Nonaccrual loans have been included in the tables as loans carrying a zero yield. Amortized net deferred loan fees and net unearned discounts on acquired loans were included in the interest income calculations. The(1) amortization of net deferred loan fees was $11.3 million and $5.0 million for the three months ended September 30, 2021 and 2020, respectively. The incremental accretion income on acquired loans was $884 thousand and $1.7 million for the three months ended September 30, 2021 and 2020, respectively.

Tax-exempt income is calculated on a tax equivalent basis. The tax equivalent yield adjustment to interest earned on loans was $1.2 million(2) for both the three months ended September 30, 2021 and 2020. The tax equivalent yield adjustment to interest earned on tax exempt securities was $722 thousand and $622 thousand for the three months ended September 30, 2021 and 2020, respectively.

AVERAGE BALANCES AND RATES

Columbia Banking System, Inc.

Unaudited

Three Months Ended Three Months Ended

September 30, 2021 June 30, 2021

Average Interest AverageAverage Interest Average Balances Earned / Rate Balances Earned / Rate Paid Paid



(dollars in thousands)

ASSETS

Loans, net (1)(2) $9,526,052 $106,3454.43% $9,664,169 $100,9084.19%

Taxable securities 5,929,321 26,374 1.76% 5,291,380 24,750 1.88%

Tax exempt 615,813 3,436 2.21% 623,458 3,577 2.30% securities (2)

Interest-earning 749,585 284 0.15% 597,321 159 0.11% deposits with banks

Total interest-earning 16,820,771 136,439 3.22% 16,176,328 129,394 3.21% assets

Other earning 245,907 244,181 assets

Noninterest-earning1,263,431 1,249,971 assets

Total assets $18,330,109 $17,670,480

LIABILITIES AND SHAREHOLDERS' EQUITY

Money market $3,790,201 $741 0.08% $3,632,383 $692 0.08% accounts

Interest-bearing 1,581,598 298 0.07% 1,546,247 286 0.07% demand

Savings accounts 1,391,221 54 0.02% 1,318,837 45 0.01%

Interest-bearing public funds, other729,382 232 0.13% 702,967 245 0.14% than certificates of deposit

Certificates of 329,547 143 0.17% 329,938 158 0.19% deposit

Total interest-bearing 7,821,949 1,468 0.07% 7,530,372 1,426 0.08% deposits

FHLB advances and 7,382 73 3.92% 7,395 72 3.91% FRB borrowings

Subordinated 35,000 435 4.93% 35,030 468 5.36% debentures

Other borrowings and 55,815 24 0.17% 45,832 19 0.17% interest-bearing liabilities

Total interest-bearing 7,920,146 2,000 0.10% 7,618,629 1,985 0.10% liabilities

Noninterest-bearing7,820,301 7,529,034 deposits

Other noninterest-bearing225,513 210,038 liabilities

Shareholders' 2,364,149 2,312,779 equity

Total liabilities & shareholders' $18,330,109 $17,670,480 equity

Net interest income (tax $134,439 $127,409 equivalent)

Net interest margin (tax equivalent) 3.17% 3.16%

Nonaccrual loans have been included in the tables as loans carrying a zero yield. Amortized net deferred loan fees and net unearned discounts on acquired loans were included in the interest income calculations. The(1) amortization of net deferred loan fees was $11.3 million and $6.4 million for the three months ended September 30, 2021 and June 30, 2021, respectively. The incremental accretion income on acquired loans was $884 thousand and $856 thousand for the three months ended September 30, 2021 and June 30, 2021, respectively.

Tax-exempt income is calculated on a tax equivalent basis. The tax equivalent yield adjustment to interest earned on loans was $1.2 million(2) for both the three months ended September 30, 2021 and June 30, 2021. The tax equivalent yield adjustment to interest earned on tax exempt securities was $722 thousand and $751 thousand for the three months ended September 30, 2021 and June 30, 2021, respectively.

AVERAGE BALANCES AND RATES

Columbia Banking System, Inc.

Unaudited

Nine Months Ended Nine Months Ended

September 30, 2021 September 30, 2020

Average Interest AverageAverage Interest Average Balances Earned / Rate Balances Earned / Rate Paid Paid



(dollars in thousands)

ASSETS

Loans, net (1)(2) $9,592,178 $308,7304.30% $9,370,101 $322,3474.60%

Taxable securities 5,286,406 73,940 1.87% 3,304,295 58,533 2.37%

Tax exempt 615,169 10,505 2.28% 415,973 8,733 2.80% securities (2)

Interest-earning 650,203 595 0.12% 458,987 480 0.14% deposits with banks

Total interest-earning 16,143,956 $393,7703.26% 13,549,356 $390,0933.85% assets

Other earning 244,269 234,044 assets

Noninterest-earning1,247,801 1,256,525 assets

Total assets $17,636,026 $15,039,925

LIABILITIES AND SHAREHOLDERS' EQUITY

Money market $3,625,688 $2,132 0.08% $2,925,672 $3,649 0.17% accounts

Interest-bearing 1,526,312 849 0.07% 1,211,958 1,160 0.13% demand

Savings accounts 1,311,118 139 0.01% 982,507 117 0.02%

Interest-bearing public funds, other698,745 753 0.14% 512,548 1,693 0.44% than certificates of deposit

Certificates of 331,910 506 0.20% 351,973 1,122 0.43% deposit

Total interest-bearing 7,493,773 4,379 0.08% 5,984,658 7,741 0.17% deposits

FHLB advances and 7,395 217 3.92% 455,303 6,191 1.82% FRB borrowings

Subordinated 35,034 1,371 5.23% 35,207 1,404 5.33% debentures

Other borrowings and 51,787 66 0.17% 41,706 178 0.57% interest-bearing liabilities

Total interest-bearing 7,587,989 $6,033 0.11% 6,516,874 $15,514 0.32% liabilities

Noninterest-bearing7,482,888 6,073,718 deposits

Other noninterest-bearing223,911 202,105 liabilities

Shareholders' 2,341,238 2,247,228 equity

Total liabilities & shareholders' $17,636,026 $15,039,925 equity

Net interest income (tax $387,737 $374,579 equivalent)

Net interest margin (tax equivalent) 3.21% 3.69%

Nonaccrual loans have been included in the table as loans carrying a zero yield. Amortized net deferred loan fees and net unearned discounts on acquired loans were included in the interest income calculations. The(1) amortization of net deferred loan fees was $26.0 million and $12.5 million for the nine months ended September 30, 2021 and 2020, respectively. The incremental accretion on acquired loans was $2.8 million and $4.8 million for the nine months ended September 30, 2021 and 2020, respectively.

Tax-exempt income is calculated on a tax equivalent basis. The tax equivalent yield adjustment to interest earned on loans was $3.5 million(2) and $3.7 million for the nine months ended September 30, 2021 and 2020, respectively. The tax equivalent yield adjustment to interest earned on tax exempt securities was $2.2 million and $1.8 million for the nine months ended September 30, 2021 and 2020, respectively.

Non-GAAP Financial Measures

The Company considers its operating net interest margin (tax equivalent) and operating efficiency ratios to be useful measurements as they more closely reflect the ongoing operating performance of the Company. Despite the usefulness of the operating net interest margin (tax equivalent) and operating efficiency ratio to the Company, there are no standardized definitions for these metrics. As a result, the Company's calculations may not be comparable with those of other organizations. The Company encourages readers to consider its consolidated financial statements in their entirety and not to rely on any single financial measure.

The following tables reconcile the Company's calculation of the operating net interest margin (tax equivalent) and operating efficiency ratio:

Three Months Ended Nine Months Ended

September 30, June 30, September 30, September 30, September 30,

2021 2021 2020 2021 2020



Operating net interest margin(dollars in thousands) non-GAAP reconciliation:

Net interest income (tax $134,439 $127,409 $126,554 $387,737 $374,579 equivalent) (1)

Adjustments to arrive at operating net interest income (tax equivalent):

Incremental accretion (884) (856) (1,665) (2,795) (4,831) income on acquired loans

Premium amortization on422 532 701 1,474 2,803 acquired securities

Interest reversals on - - 393 - 1,854 nonaccrual loans (2)

Operating net interest income$133,977 $127,085 $125,983 $386,416 $374,405 (tax equivalent) (1)



Average interest $16,820,771 $16,176,328 $14,492,435 $16,143,956 $13,549,356 earning assets

Net interest margin (tax 3.17 %3.16 %3.47 %3.21 %3.69 %equivalent) (1)

Operating net interest margin3.16 %3.15 %3.46 %3.20 %3.69 %(tax equivalent) (1)

Three Months Ended Nine Months Ended

September June 30, September September September 30, 30, 30, 30,

2021 2021 2020 2021 2020



Operating efficiency ratio non-GAAP (dollars in thousands) reconciliation:

Noninterest expense $90,007 $84,116 $85,115 $257,682 $250,219 (numerator A)

Adjustments to arrive at operating noninterest expense:

Acquisition-related (2,192) (510) - (2,702) - expenses

Net benefit (cost) of operation of OREO(4) (111) 160 (42) 356 and OPPO

Loss on asset (11) (2) - (19) (224) disposals

B&O taxes (1,583) (1,490) (1,559) (4,332) (3,427)

Operating noninterest expense $86,217 $82,003 $83,716 $250,587 $246,924 (numerator B)



Net interest income $134,439 $127,409 $126,554 $387,737 $374,579 (tax equivalent) (1)

Noninterest income 23,958 22,730 22,472 69,854 80,938

Bank owned life insurance tax 422 434 422 1,271 1,276 equivalent adjustment

Total revenue (tax equivalent) $158,819 $150,573 $149,448 $458,862 $456,793 (denominator A)



Operating net interest income (tax$133,977 $127,085 $125,983 $386,416 $374,405 equivalent) (1)

Adjustments to arrive at operating noninterest income (tax equivalent):

Investment - (314) - (314) (16,674) securities gain, net

Gain on asset - (287) (247) (287) (294) disposals

Operating noninterest income 24,380 22,563 22,647 70,524 65,246 (tax equivalent)

Total operating revenue (tax $158,357 $149,648 $148,630 $456,940 $439,651 equivalent) (denominator B)

Efficiency ratio (tax equivalent) 56.67 %55.86 %56.95 %56.16 %54.78 %(numerator A/ denominator A)

Operating efficiency ratio (tax equivalent) 54.44 %54.80 %56.33 %54.84 %56.16 %(numerator B/ denominator B)

Tax-exempt interest income has been adjusted to a tax equivalent basis. The amount of such adjustment was an addition to net interest income of $1.9(1) million for both the three months ended September 30, 2021 and June 30, 2021, $1.8 million for the three months ended September 30, 2020 and $5.7 million and $5.6 million for the nine months ended September 30, 2021 and 2020, respectively.

(2) Beginning January 2021, interest reversals on nonaccrual loans is no longer a component of these non-GAAP financial measures.

Non-GAAP Financial Measures - Continued

The Company also considers its core noninterest expense ratio to be a useful measurement as it more closely reflects the ongoing operating performance of the Company. Despite the usefulness of the core noninterest expense ratio to the Company, there is not a standardized definition for it, as a result, the Company's calculations may not be comparable with those of other organizations. The Company encourages readers to consider its consolidated financial statements in their entirety and not to rely on any single financial measure.

The following table reconciles the Company's calculation of the core noninterest expense ratio:

Three Months Ended Nine Months Ended

September 30, June 30, September 30, September 30, September 30,

2021 2021 2020 2021 2020



Core noninterest expense ratio (dollars in thousands) non-GAAP reconciliation:

Noninterest expense$90,007 $84,116 $85,115 $257,682 $250,219 (numerator A)

Adjustments to arrive at core noninterest expense:

Acquisition-related(2,192) (510) - (2,702) - expenses

Core noninterest expense (numerator $87,815 $83,606 $85,115 $254,980 $250,219 B)



Average assets $18,330,109 $17,670,480 $15,965,485 $17,636,026 $15,039,925 (denominator)

Noninterest expense ratio (numerator A/1.96 %1.90 %2.13 %1.95 %2.22 %denominator) (1)

Core noninterest expense ratio 1.92 %1.89 %2.13 %1.93 %2.22 %(numerator B/ denominator)

(1) For the purpose of this ratio, interim noninterest expense has been annualized.

(2) For the purpose of this ratio, interim core noninterest expense has been annualized.

The Company considers its pre-tax, pre-provision income to be a useful measurement in evaluating the earnings of the Company as it provides a method to assess income. Despite the usefulness of this measure to the Company, there is not a standardized definition for it. As a result, the Company's calculation may not always be comparable with those of other organizations. The Company encourages readers to consider its consolidated financial statements in their entirety and not to rely on any single financial measure.

The following table reconciles the Company's calculation of the pre-tax, pre-provision income:

Three Months Ended Nine Months Ended

SeptemberJune 30, SeptemberSeptember September 30, 30, 30, 30,

2021 2021 2020 2021 2020



Pre-tax, pre-provision (in thousands) income:

Income before income$66,491$69,576$54,683$200,468$117,318taxes

Provision (recapture) for - (5,500) 7,400 (6,300) 82,400 credit losses

Provision for unfunded commitments500 200 800 2,200 4,600 (1)

B&O taxes (1) 1,583 1,490 1,559 4,332 3,427

Pre-tax, $68,574$65,766$64,442$200,700$207,745pre-provision income

Beginning the second quarter of 2021, provision for unfunded commitments(1) and B&O taxes are components of this non-GAAP measure. Prior periods have been adjusted to conform to current period presentation.

The Company considers its tangible common equity ratio and tangible book value per share ratio to be useful measurements in evaluating the capital adequacy of the Company as they provide a method to assess management's success in utilizing our tangible capital. Despite the usefulness of these ratios to the Company, there is not a standardized definition for these metrics. As a result, the Company's calculation may not always be comparable with those of other organizations. The Company encourages readers to consider its consolidated financial statements in their entirety and not to rely on any single financial measure.

The following table reconciles the Company's calculation of the tangible common equity ratio and tangible book value per share ratio:

September 30, June 30, September 30,

2021 2021 2020



Tangible common equity ratio and tangible book value per (dollars in thousands except per share common share non-GAAP amounts) reconciliation:

Shareholders' equity $2,323,267 $2,333,246 $2,301,981 (numerator A)

Adjustments to arrive at tangible common equity:

Goodwill (765,842) (765,842) (765,842)

Other intangible assets, net (21,123) (22,958) (28,745)

Tangible common equity $1,536,302 $1,544,446 $1,507,394 (numerator B)



Total assets (denominator A) $18,602,462 $18,013,477 $16,233,424

Adjustments to arrive at tangible assets:

Goodwill (765,842) (765,842) (765,842)

Other intangible assets, net (21,123) (22,958) (28,745)

Tangible assets (denominator $17,815,497 $17,224,677 $15,438,837 B)



Shareholders' equity to total assets (numerator A/ 12.49 %12.95 %14.18 %denominator A)

Tangible common shareholders' equity to tangible assets 8.62 %8.97 %9.76 %(numerator B/denominator B)

Common shares outstanding 71,760 71,742 71,613 (denominator C)

Book value per common share $32.38 $32.52 $32.14 (numerator A/denominator C)

Tangible book value per common share (numerator B/ $21.41 $21.53 $21.05 denominator C)

Non-GAAP Financial Measures - Continued

The Company considers its ratio of allowance for credit losses to period-end loans, excluding PPP loans, to be a useful measurement in evaluating the adequacy of the amount of allowance for credit losses to loans of the Company, as PPP loans are guaranteed by the U.S. Small Business Administration and thus do not require the same amount of reserve for credit losses as do other loans. Despite the usefulness of this ratio to the Company, there is not a standardized definition for it. As a result, the Company's calculation may not always be comparable with those of other organizations. The Company encourages readers to consider its consolidated financial statements in their entirety and not to rely on any single financial measure.

The following table reconciles the Company's calculation of the allowance for credit losses to period-end loans, excluding PPP loans:

September 30,June 30, September 30,

2021 2021 2020

Allowance coverage ratio (dollars in thousands) non-GAAP reconciliation:

Allowance for credit losses $142,785 $142,988 $156,968 ("ACL") (numerator)



Total loans (denominator A) 9,521,385 9,693,116 9,688,947

Less: PPP loans (0% Allowance) 337,025 691,949 953,244

Total loans, net of PPP loans $9,184,360 $9,001,167 $8,735,703 (denominator B)



ACL to period end loans 1.50 %1.48 %1.62 %(numerator / denominator A)

ACL to period end loans, excluding PPP loans (numerator /1.55 %1.59 %1.80 %denominator B)

The Company also considers its return on average tangible common equity ratio to be a useful measurement as it evaluates the Company's ongoing ability to generate returns for its common shareholders. By removing the impact of intangible assets and their related amortization and tax effects, the performance of the business can be evaluated, whether acquired or developed internally. Despite the usefulness of this ratio to the Company, there is not a standardized definition for it. As a result, the Company's calculation may not always be comparable with those of other organizations. The Company encourages readers to consider its consolidated financial statements in their entirety and not to rely on any single financial measure.

The following table reconciles the Company's calculation of the return on average tangible common shareholders' equity ratio:

Three Months Ended Nine Months Ended

September 30,June 30, September 30,September 30,September 30,

2021 2021 2020 2021 2020



Return on average tangible common(dollars in thousands) equity non-GAAP reconciliation:

Net income $53,017 $55,039 $44,734 $159,909 $95,944 (numerator A)

Adjustments to arrive at tangible income applicable to common shareholders:

Amortization of1,835 1,852 2,193 5,611 6,713 intangibles

Tax effect on intangible (385) (389) (461) (1,178) (1,410) amortization

Tangible income applicable to common $54,467 $56,502 $46,466 164,342 $101,247 shareholders (numerator B)



Average shareholders' $2,364,149 $2,312,779 $2,293,771 2,341,238 $2,247,228 equity (denominator A)

Adjustments to arrive at average tangible common equity:

Average (788,173) (790,015) (795,650) (789,954) (797,853) intangibles

Average tangible common$1,575,976 $1,522,764 $1,498,121 $1,551,284 $1,449,375 equity (denominator B)



Return on average common equity 8.97 %9.52 %7.80 %9.11 %5.69 %(numerator A/ denominator A) (1)

Return on average tangible common equity 13.82 %14.84 %12.41 %14.13 %9.31 %(numerator B/ denominator B) (2)

(1) For the purpose of this ratio, interim net income has been annualized.

(2) For the purpose of this ratio, interim tangible income applicable to common shareholders has been annualized.

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SOURCE Columbia Banking System