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NBTB Earnings Presentation Third Quarter 2026
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Forward-Looking Statements This presentation contains forward-looking statements, as defined in the Private Securities Litigation Reform Act of 1995. These statements may be identified by the use of phrases such as “anticipate,” “believe,” “expect,” “forecasts,” “projects,” “will,” “can,” “would,” “should,” “could,” “may,” or other similar terms. There are a number of factors, many of which are beyond the Company’s control, that could cause actual results to differ materially from those contemplated by any forward-looking statements. Factors that may cause actual results to differ materially from those contemplated by such forward-looking statements include, among others, the following possibilities: (1) local, regional, national and international economic conditions, including actual or potential stress in the banking industry, and the impact they may have on the Company and its customers, and the Company’s assessment of that impact; (2) changes in the level of nonperforming assets and charge-offs; (3) changes in estimates of future reserve requirements based upon the periodic review thereof under relevant regulatory and accounting requirements; (4) the effects of and changes in trade and monetary and fiscal policies and laws, including the interest rate policies of the Federal Reserve Board (“FRB”) and international trade disputes (including threatened or implemented tariffs imposed by the U.S. and threatened or implemented tariffs imposed by foreign countries in retaliation); (5) inflation, interest rate, securities market and monetary fluctuations; (6) political instability; (7) acts of war, including international military conflicts, or terrorism; (8) the timely development and acceptance of new products and services and the perceived overall value of these products and services by users; (9) changes in consumer spending, borrowing and saving habits; (10) changes in the financial performance and/or condition of the Company’s borrowers; (11) technological changes; (12) acquisition and integration of acquired businesses; (13) the ability to increase market share and control expenses; (14) changes in the competitive environment among financial holding companies; (15) the effect of changes in laws and regulations (including laws and regulations concerning taxes, banking, securities and insurance) with which the Company and its subsidiaries must comply, including those under the Dodd-Frank Act, and the Economic Growth, Regulatory Relief, and Consumer Protection Act of 2018; (16) the effect of changes in accounting policies and practices, as may be adopted by the regulatory agencies, as well as the Public Company Accounting Oversight Board, the Financial Accounting Standards Board and other accounting standard setters; (17) changes in the Company’s organization, compensation and benefit plans; (18) the costs and effects of legal and regulatory developments, including the resolution of legal proceedings or regulatory or other governmental inquiries, and the results of regulatory examinations or reviews; (19) greater than expected costs or difficulties related to the integration of new products and lines of business; and (20) the Company’s success at managing the risks involved in the foregoing items. The Company cautions readers not to place undue reliance on any forward-looking statements, which speak only as of the date on which they are made, and advises readers that various factors, including, but not limited to, those described above and other factors discussed in the Company’s annual and quarterly reports previously filed with the SEC, could affect the Company’s financial performance and could cause the Company’s actual results or circumstances for future periods to differ materially from those anticipated or projected. Unless required by law, the Company does not undertake, and specifically disclaims any obligations to, publicly release any revisions that may be made to any forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date of such statements. 2
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Q3 2026 Results Highlights 3 Reported Operating (1) $1.11 $1.11 Earnings per share Reported (1)(2) Operating (1)(2) 16.54% 16.53% Return on average tangible equity $195 million Total revenue (3) $11.95 billion Period end loans $13.59 billion Period end deposits $27.75 ▲ 8.8% bps vs. Q3 2025 TBV per share (1) Record Quarter Earnings • Revenue(3) increased 4.8% from the third quarter of 2025 • Net interest margin (1) increased 12 bps from the third quarter of 2025 Well Positioned Balance Sheet • Diversified portfolios with a balance of commercial and consumer loans and deposits • Period end total loans increased $350.4 million, or 3.0%, from December 31, 2025 • Excluding the other consumer and residential solar portfolios, which are in a planned run -off status, period end loans increased $427.2 million, or 3.9%, from December 31, 2025 • Loans to deposits ratio was 87.9% at September 30, 2026, providing considerable balance sheet optionality Capital Strength • Announced fourth cash dividend of $0.40 per share, an 8.1% increase over the prior year fourth quarter • Total risk-based capital of 14.36% • Tangible equity to assets of 9.07% (1) and tangible book value per share of $27.75 (1) 1. Non-GAAP measure; refer to appendix for reconciliation of Non -GAAP measures. | 2. Annualized. | 3. Excludes n et securities gains (losses).
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Results Overview Q3 2026 4 1. Comparison to Q2 2026 unless otherwise stated. | 2. Non -GAAP measure; refer to appendix for reconciliation of Non -GAAP measures. | 3. Annualized. | 4. Core deposits exclude time deposits accounts. ($ in millions except per share data) Change % Change Q3 2026 Q2 2026 Q3 2025 Q2 2026 Q3 2025 Period End Balance Sheet Total loans $ 11,948.5 $ 74.4 $ 353.4 0.6% 3.0% Total deposits 13,586.4 49.1 (74.5) 0.4% (0.5%) Income Statement FTE net interest income (2) $ 142.7 $ 5.2 $ 7.5 3.8% 5.5% Net income 58.0 5.0 3.6 9.4% 6.5% Earnings per share, diluted 1.11 0.09 0.08 8.8% 7.8% Performance Ratios Net interest margin (2)(3) 3.78% 0.05% 0.12% 1.3% 3.3% ROAA (3) 1.41% 0.09% 0.06% 6.8% 4.4% ROATCE (2)(3) 16.54% 0.89% (0.81%) 5.7% (4.7%) NCOs/ Avg loans (%)(3) 0.14% (0.01%) (0.01%) (6.7%) (6.7%) Operating Results Net income (2) $ 58.0 $ 5.1 $ 2.7 9.6% 4.8% Earnings per share, diluted (2) 1.11 0.10 0.06 9.9% 5.7% ROAA (2)(3) 1.41% 0.09% 0.04% 6.8% 2.9% ROATCE (2)(3) 16.53% 0.92% (1.08%) 5.9% (6.1%) Capital Tangible book value per share (2) $ 27.75 $ 0.04 $ 2.24 0.1% 8.8% Tangible equity ratio (2) 9.07% (0.09%) 0.49% (1.0%) 5.7% Leverage ratio 9.99% 0.14% 0.65% 1.4% 7.0% Common equity tier 1 capital ratio 12.43% 0.19% 0.63% 1.6% 5.3% Tier 1 capital ratio 12.43% 0.19% 0.63% 1.6% 5.3% Total risk-based capital ratio 14.36% 0.18% 0.39% 1.3% 2.8% HIGHLIGHTS(1) Balance Sheet • Average total interest-earning assets grew 2.3% from Q3 2025 • Loans grew 3.0% in the first nine months of 2026 • Core deposits grew 2.6% in the first nine months of 2026(4) • T angible equity ratio was 9.07%(2) Earnings & Capital • Reported and operating net income(2) of $58.0 million and operating diluted earnings per share(2) of $1.11 • Operating ROAA(2) of 1.41% • Operating ROTCE(2) of 16.53% • Net interest margin(2)(3) up 5 bps to 3.78% • T angible book value per share(2) at $27.75, up 8.8% from the third quarter 2025
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Home Equity 4% Residential Mortgage 22% Indirect Auto 12% C&I 14% Owner Occupied CRE 9% Non-Owner Occupied CRE 33% Residential Solar and Other Consumer 6% $11.60 $11.60 $11.55 $11.87 $11.95 5.80% 5.70% 5.66% 5.64% 5.69% Q3' 25 Q4' 25 Q1' 26 Q2' 26 Q3' 26 Total Loans ($) Yield on Loans (%) Loans 5 Yield on Loans (%) / Total Loans ($ in billions) 1. Comparison to Q2 2026 unless otherwise stated. | 2. New origination yields for the third quarter of 2026. HIGHLIGHTS(1) • Loans increased $350.4 million, or 3.0% from December 31, 2025 • Total commercial loans increased $234 million to $6.70 billion • Total consumer loans increased $116 million to $5.24 billion • Loan Mix: Commercial 56% / Consumer 44% • 57% Fixed and 43% Adjustable / Floating • $2.7 billion in variable rate loans $11.95 billion Total Loans Quarterly Loan Yields Line of Business Portfolio New Origination (2) Commercial 6.18% 6.41% Indirect Auto 5.76% 5.51% Residential Mortgage 4.70% 6.02%
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Deposits 6 Demand (Noninterest Bearing) 29% Savings and Interest-Bearing Checking 30% Money Market 32% Time 9% 1. Comparison to Q2 2026 unless otherwise stated. | 2. Includes commercial, business banking and municipal customers. Deposit Mix Balance as of September 30, 2026 Number of Accounts Average Balance per Account Consumer $ 6.70 billion 520,289 $ 12,869 Commercial(2) $ 6.89 billion 89,705 $ 76,817 Total $ 13.59 billion 609,994 $ 22,273 Diverse & Granular Deposit Mix HIGHLIGHTS(1) • Cost of total deposits of 1.32%, down 1 bp • Total cost of funds was 1.42%, up 1 bp • Period end deposits increased $87.2 million, or 0.6%, from December 31, 2025 • No and low-cost deposits were 59% of total deposits with a cost of 38 bps • Total deposits represented 96% of funding • Loan to deposit ratio of 87.9% Total Deposits $13.59 billion Cost of Interest-Bearing Deposits Savings and Interest-Bearing Checking 0.74% Money Market 2.66% Time 2.64% Total Interest-Bearing 1.85%
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Net Interest Income & Net Interest Margin 7 Net Interest Income and annualized Net Interest Margin are shown on a fully tax equivalent basis, which is a Non-GAAP measure; refer to appendix for reconciliation of Non -GAAP measures. 1. Comparison to Q2 2026 unless otherwise stated. HIGHLIGHTS(1) • Net interest income increased $5.2 million to $142.7 million • Driven by organic loan growth and one additional day in the third quarter of 2026 • Higher earning asset yields partially offset by an increase in funding costs • Net accretion of acquired loans and borrowings was $7.3 million up $1.5 million from the prior quarter • Net interest margin increased 5 bps to 3.78% • Interest-earning asset yields increased 6 bps with loan yields up 5 bps • Total cost of funds increased 1 bp to 1.42% Net Interest Income Change in Interest Rates % Change from Base Up 200 bps 0.43% Up 100 bps 0.49% Down 100 bps (0.41)% Down 200 bps (0.27)% Year 1 Interest Rate Sensitivity Net Interest Income ($ in millions) & Net Interest Margin (%) 3.73% -0.01% 3.78%0.06% NIM 6/30/2026 Asset yield rate/volume Funding cost rate/volume NIM 9/30/2026 3.00% 3.20% 3.40% 3.60% 3.80% 4.00% Q3 2026 Net Interest Margin $135.3 $136.0 $134.9 $137.6 $142.7 3.66% 3.65% 3.72% 3.73% 3.78% 3.25% 3.50% 3.75% 4.00% 4.25% $75.0 $100.0 $125.0 $150.0 Q3 2025 Q4 2025 Q1 2026 Q2 2026 Q3 2026 Net Interest Income Net Interest Margin
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Service charges on deposit accounts Card services income Retirement plan administration fees Wealth management Noninterest Income 8 Noninterest Income Trend(2) ($ in millions) Peer Source Data: S&P Global Market Intelligence. | Refer to appendix for Peer Group. | 1. Comparison to Q2 2 026 unless otherwise stated. | 2. Excludes net securities gains (losses). $7.6 $8.2 $6.2 $5.7 $6.3 $5.3 $3.9 $4.5 $4.2 $5.4 $11.1 $12.0 $11.1 $10.9 $11.2 $15.9 $14.1 $16.6 $16.9 $17.3 $6.4 $6.2 $6.0 $6.6 $6.8 $5.1 $5.1 $5.3 $5.2 $5.9 $0.0 $10.0 $20.0 $30.0 $40.0 $50.0 $60.0 Q3 2025 Q4 2025 Q1 2026 Q2 2026 Q3 2026 HIGHLIGHTS(1) (2) • $52.9 million in noninterest income • Noninterest income increased $1.5 million or 2.9% from Q3 2025 with: • Retirement plan administration fees up $1.4 million • Service charges on deposit accounts up $0.8 million • Card services income up $0.4 million • Bank owned life insurance income down $0.8 million • Noninterest income to total revenue was 27% (above peer levels)
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Noninterest Expense 9 Noninterest Expense Trend(2) ($ in millions) 1. Comparisons to Q2 2026 unless otherwise stated. | 2. Other expense excludes acquisition of $1.1 million for Q3 202 5. $43.4 $45.7 $43.5 $42.4 $45.6 $66.6 $66.0 $68.8 $69.0 $69.6 $0.0 $25.0 $50.0 $75.0 $100.0 $125.0 Q3 2025 Q4 2025 Q1 2026 Q2 2026 Q3 2026 Other expense Salaries & benefits HIGHLIGHTS(1) Salaries & Benefits • Increased $0.6 million driven by one additional payroll day and higher incentive compensation expenses, which were partially offset by lower medical expenses and lower payroll taxes Other Expenses • Reserve for unfunded loan commitments increased $0.5 million • Other expenses increased driven by an increase in activity -based costs
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Asset Quality 10 Net Charge-Offs Loan Loss ReservesNonperforming Assets(3) (1) $4,300 $4,765 $4,977 $4,236 $4,292 0.15% 0.16% 0.17% 0.15% 0.14% 0.00% 0.15% 0.30% 0.45% $0 $1,500 $3,000 $4,500 $6,000 $7,500 Q3 2025 Q4 2025 Q1 2026 Q2 2026 Q3 2026 Net Charge-offs ($000) NCOs/Avg Loans (%) $53,683 $52,125 $61,277 $65,308 $70,328 0.33% 0.33% 0.38% 0.40% 0.43% 0.05% 0.20% 0.35% 0.50% 0.65% $0 $25,000 $50,000 $75,000 $100,000 Q3 2025 Q4 2025 Q1 2026 Q2 2026 Q3 2026 Nonperforming Assets ($000) NPAs/Assets (%) $139,000 $138,000 $138,600 $140,500 $140,000 1.20% 1.19% 1.20% 1.18% 1.17% 0.75% 1.00% 1.25% 1.50% 1.75% $80,000 $100,000 $120,000 $140,000 $160,000 Q3 2025 Q4 2025 Q1 2026 Q2 2026 Q3 2026 Loan Loss Reserve ($000) Reserves/Loans (%) 1. Annualized. | 2. Excluding provision for loan losses on non -PCD loans. | 3. Nonperforming assets include nonaccru al loans, loans ninety days past due and still accruing and other real estate owned. Provision for Loan Losses (2) $3,100 $3,765 $5,577 $6,136 $3,792 $0 $2,500 $5,000 $7,500 $10,000 Q3 2025 Q4 2025 Q1 2026 Q2 2026 Q3 2026 Provision for Loan Losses ($000)
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APPENDIX 11 Appendix
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APPENDIX $138,000 $15,505 $(13,505) $140,000 Reserve 12/31/2025 (+) Provision Expense (-) Net Charge-Offs Reserve 9/30/2026 12 Loan Type 9/30/2025 12/31/2025 3/31/2026 6/30/2026 9/30/2026 Commercial & Industrial 0.81% 0.76% 0.89% 0.85% 0.92% Commercial Real Estate 1.13% 1.06% 1.05% 1.06% 1.01% Residential Mortgage and Home Equity 1.05% 1.06% 0.99% 0.99% 1.00% Auto 0.70% 0.68% 0.70% 0.70% 0.70% Residential Solar and Other Consumer 3.62% 4.09% 4.39% 4.39% 4.44% Total 1.20% 1.19% 1.20% 1.18% 1.17% Reserve / Loans by Segment Loan Loss Reserve Activity ($ in thousands) Loan Loss Reserve (CECL)
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APPENDIX Commercial Portfolio Detail Residential Rental Properties 44.9% Office 13.4% Retail 13.1% Manufacturing and Warehouse 9.8% Mixed Use 12.4% Hotel 4.3% Other 2.1% 13 Real Estate Industry 15.7% Construction Trade 10.5% Wholesalers 8.8% Manufacturing 13.1% Medical 5.9% General Retailers 3.1% Agriculture 6.1% Automotive Retailers 1.5%Education 2.2%Food Services 2.4% All Other Industries 30.7% Real Estate Industry 8.6% Construction Trade 6.8% Wholesalers 8.6% Manufacturing 8.9% Medical 10.5%General Retailers 11.3% Automotive Retailers 5.2% Education 3.7% Theaters, Amusements, Gaming, etc. 9.0% Food Services 6.4% All Other Industries 21.0% Owner Occupied CRE ($1.03 billion) Commercial & Industrial ($1.75 billion) Non-Owner Occupied CRE ($3.92 billion) Non-Owner Occupied CRE to Capital was 214.1% Commercial Loan Portfolio $6.70 billion
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APPENDIX14 Indirect Auto 28% Other Consumer 1% Residential Solar 13% Residential Mortgage 49% Home Equity 9% Consumer Lending Portfolio Metrics Category Total Outstandings ($000s) # of Accounts Average Balance Weighted Average FICO Average DTI Residential Mortgage $ 2,584,169 15,886 $ 162,670 764 35 Indirect Auto $ 1,449,719 64,791 $ 22,375 767 33 Residential Solar $ 671,865 23,672 $ 28,382 761 35 Home Equity $ 481,142 12,592 $ 38,210 785 33 Other Consumer $ 56,740 28,917 $ 1,962 755 30 Consumer Lending Portfolio $5.24 billion Consumer & Residential Portfolio Detail
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APPENDIX15 September 30, 2026 December 31, 2025 AFS Securities (In thousands) Amortized Net Unrealized Estimated Amortized Net Unrealized Estimated Cost (Losses)/Gains Fair Value Cost (Losses)/Gains Fair Value U.S. treasury & federal agency $ 362,740 $ (22,852) $ 339,888 $ 327,642 $ (19,544) $ 308,098 State & municipal 79,495 (4,092) 75,403 90,654 (3,927) 86,727 U.S. government sponsored: Mortgage-backed 781,026 (56,003) 725,023 616,442 (24,880) 591,562 Collateralized mortgage obligations 904,156 (71,981) 832,175 901,420 (45,934) 855,486 Corporate 17,500 (629) 16,871 22,500 (1,535) 20,965 Total securities $ 2,144,917 $ (155,557) $ 1,989,360 $ 1,958,658 $ (95,820) $ 1,862,838 September 30, 2026 December 31, 2025 HTM Securities (In thousands) Amortized Net Unrealized Estimated Amortized Net Unrealized Estimated Cost (Losses)/Gains Fair Value Cost (Losses)/Gains Fair Value U.S. treasury & federal agency $ 100,000 $ (13,279) $ 86,721 $ 100,000 $ (10,705) $ 89,295 State & municipal 317,458 (18,611) 298,847 266,382 (11,522) 254,860 U.S. government sponsored: Mortgage-backed 214,464 (30,594) 183,870 202,601 (23,378) 179,223 Collateralized mortgage obligations 176,723 (19,775) 156,948 193,773 (14,574) 179,199 Corporate - - - - - - Total securities $ 808,645 $ (82,259) $ 726,386 $ 762,756 $ (60,179) $ 702,577 HIGHLIGHTS • Total net unrealized loss on investment securities was up 52% from December 31, 2025 • $375 to $400 million of annual expected cash flows Investment Securities Portfolio
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APPENDIX Reconciliation of Non-GAAP Measures 16 1. Annualized. (Dollars in Thousands, Except Per Share Data) Q3 2026 Q2 2026 Q3 2025 Net Income $ 58,028 $ 53,030 $ 54,471 Amortization of Intangible Assets (Net of Tax) 2,267 2,393 2,572 Net Income, Excluding Intangibles Amortization $ 60,295 $ 55,423 $ 57,043 Average Tangible Common Equity $ 1,446,149 $ 1,420,780 $ 1,304,322 Return on Average Tangible Common Equity (1) 16.54% 15.65% 17.35% Total Stockholders’ Equity $ 1,942,479 $ 1,943,919 $ 1,853,146 Goodwill and Other Intangibles (501,373) (504,395) (515,090) Tangible Common Equity $ 1,441,106 $ 1,439,524 $ 1,338,056 Total Assets $ 16,393,701 $ 16,214,957 $ 16,112,584 Goodwill and Other Intangibles (501,373) (504,395) (515,090) Tangible Assets $ 15,892,328 $ 15,710,562 $ 15,597,494 Tangible Common Equity to Tangible Assets 9.07% 9.16% 8.58% Common Shares Outstanding 51,940,582 51,954,984 52,448,654 Book Value Per Share $ 37.40 $ 37.42 $ 35.33 Tangible Book Value Per Share $ 27.75 $ 27.71 $ 25.51
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APPENDIX Reconciliation of Non-GAAP Measures 17 1. Annualized. (Dollars in Thousands) Q3 2026 Q2 2026 Q1 2026 Q4 2025 Q3 2025 Net Interest Income $ 142,084 $ 136,963 $ 134,348 $ 135,440 $ 134,663 FTE Adjustment 660 614 578 581 594 Net Interest Income, Tax Equivalent $ 142,744 $ 137,577 $ 134,926 $ 136,021 $ 135,257 Average Total Interest Earning Assets $ 14,978,237 $ 14,804,621 $ 14,694,823 $ 14,768,404 $ 14,643,524 Net Interest Margin, Tax Equivalent (1) 3.78% 3.73% 3.72% 3.65% 3.66% (Dollars in Thousands, Except Per Share Data) Q3 2026 Q2 2026 Q3 2025 Net Income $ 58,028 $ 53,030 $ 54,471 Acquisition Expenses - - 1,125 Securities (Gains) Losses (62) (175) 2 Adjustments to Net Income $ (62) $ (175) $ 1,127 Adjustments to Net Income (Net of Tax) $ (47) $ (134) $ 851 Operating Net Income $ 57,981 $ 52,896 $ 55,322 Operating Diluted Earnings Per Share $ 1.11 $ 1.01 $ 1.05 Operating Return on Average Assets (1) 1.41% 1.32% 1.37% Operating Return on Average Tangible Common Equity (1) 16.53% 15.61% 17.61%
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APPENDIX Peer Group Name HQ City State Ticker Beacon Financial Corporation Boston MA BBT Camden National Corporation Camden ME CAC CNB Financial Corporation Clearfield PA CCNE Community Financial System, Inc. Syracuse NY CBU ConnectOne Bancorp, Inc. Englewood NJ CNOB Dime Community Bancshares, Inc. Hauppauge NY DCOM Eastern Bankshares, Inc. Boston MA EBC First Busey Corporation Leawood KS BUSE First Commonwealth Financial Corporation Indiana PA FCF First Financial Bancorp. Cincinnati OH FFBC First Merchants Corporation Muncie IN FRME Fulton Financial Corporation Lancaster PA FULT Independent Bank Corp. Rockland MA INDB Northwest Bancshares, Inc. Columbus OH NWBI OceanFirst Financial Corp. Red Bank NJ OCFC Park National Corporation Newark OH PRK Peoples Bancorp Inc. Marietta OH PEBO Provident Financial Services, Inc. Jersey City NJ PFS S&T Bancorp, Inc. Indiana PA STBA T ompkins Financial Corporation Ithaca NY TMP WesBanco, Inc. Wheeling WV WSBC 18