THFF First Financial Corporation

Indiana

35-1546989

(State or other jurisdiction

(I.R.S. Employer

incorporation or organization)

Identification No.)

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One First Financial Plaza, Terre Haute, IN

47807

(Address of principal executive office)

(Zip Code)

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(812)  238-6000

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(Registrant's telephone number, including area code)

Title of each class

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Trading Symbol

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Name of each exchange on which registered

Common Stock, par value $0.125 per share

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THFF

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The NASDAQ Stock Market LLC

Exhibit Number

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99.1

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First Financial Corporation, Inc. Presentation dated January28, 2025.

104

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Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)

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First Financial Corporation

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Dated January 28, 2025

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/s/ Rodger A. McHargue

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Rodger A. McHargue

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Secretary/Treasurer and Chief Financial Officer

: THFF

Forward-looking Information This presentation contains future oral and written statements of the Company and its management, forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 with respect to the financial condition, results of operations, plans, objec tives, future performance and business of the Company. Forward-looking statements are generally identifiable by the use of words such as “believe”, “expect”, “anticipate”, “estimate”, “could”, and other similar expressions. All statements in this presentation, including forward-looking statements, speak only as of today’s date, and the Company undertakes no obligation to update any statement in light of new information or future events. A number of factors, many of which are beyond the ability of the Company to control or predict, could cause actual results to differ materially from those in its forward-looking statements. Additional information is included in the Company’s filings with the Securities and Exchange Commis sion. Factors that could have a material adverse effect on the Company’s financial condition, results of operations and future prospects can be found in the “Risk Factors” section in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 and elsewhere in the Company’s periodic and current reports filed with the Securities and Exchange Commission. These factors include, but are not limited to, the effects of future economic, business and market conditions and changes, do mestic and foreign, including competition, governmental policies and seasonality; legislative and regulatory changes, including changes in banking, securit ies and tax laws and regulations and their application by Company regulators, and changes in the scope and cost of FDIC insurance and other coverages; the risks of changes in interest rates on the levels, composition and costs of deposits, loan demand and other interest sensitive assets and liabilities; the failure of assumptions and estimates underlying the establishment of reserves for possible loan losses, analysis of capital needs and other estimates; changes in borrowers’ credit risks and payment behaviors; and changes in the availability and cost of credit and capital. 2

Norman D. Lowery President & Chief Executive Officer Rodger A. McHargue Chief Financial Officer, SVP Stephen P. Panagouleas Chief Credit Officer, SVP 3

Illinois 26 Banking Centers Indiana 22 Banking Centers 4 Loan Offices Kentucky 16 Banking Centers Tennessee 16 Banking Centers 3 Loan Offices First Financial Corporation Indiana’s first multi-bank holding company Established 1984 90 Locations 83 full-service banking centers 7 loan production offices $5.5 Billion in Assets $1.9 Billion Trust and Assets Under Management First Financial Bank Primary subsidiary founded in 1834 Oldest national bank in Indiana 5th oldest national bank in the U.S. Terre Haute, Indiana Headquarters Georgia 3 Banking Centers 4

Best Bank Tribune-Star Readers’ Choice Top 50 Best U.S. Bank Bank Director Magazine Our Vision To be the foundation of community prosperity and trust for generations to come. Our Mission Empowering you with secure and innovative financial solutions focusing on quality of life. Our Values Start with SOUNDNESS The strongest foundation for success is based on experience and stability. Prioritize GROWTH Avoiding complacency with a focus on continuous improvement. Deliver VALUE Solve for every client need. Find the SOLUTION Get the job done, obstacles are not excuses, they are opportunities. Be ACCOUNTABLE Set ambitious goals and communicate transparently. Build COMMUNITY Foster a culture of respect, belonging, & support, internally and externally. 5-Star Rating BauerFinancial Best Ag Lender Pennyrile's Best Magazine 5

TBV $27.11 $28.84 $30.94 $30.83 $33.16 $34.08 $37.57 $38.67 $31.66 $36.80 $35.73 $0.00 $10.00 $20.00 $30.00 $40.00 $50.00 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 Strong Capital Key Capital Ratios and Per Share Data As of December 31, 2024 11.86% 12.51% 12.80% 12.74% 13.69% 11.91% 11.40% 9.62% 7.79% 9.15% 7.78% 0.00% 3.50% 7.00% 10.50% 14.00% 17.50% 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 TCE Total Risk Based 13.45% Tier 1 Risk Based 12.41% Tier 1 Leverage 10.37% Book Value $46.00 Tangible Book Value $35.73 6

$2.55 $2.35 $3.12 $2.38 $3.80 $3.80 $3.93 $4.02 $5.82 $5.08 $4.00 $0.97 $0.98 $0.99 $2.50 $1.02 $1.02 $1.04 $1.06 $1.17 $1.28 $1.80 $0.00 $1.50 $3.00 $4.50 $6.00 $7.50 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 Earnings and Dividends Per Share EPS Dividends Paid History of Earnings and Dividend Growth 7

Announced Repurchase Amount Shares Amount Completed April 21, 2022 10% 1,243,531 In Progress ** July 21, 2021 5% 652,411 $28,335,713 3/4/22 October 29, 2020 5% 685,726 $29,300,476 6/25/21 February 3, 2016 5% 637,500 $21,677,750 11/30/20 August 25, 2014 5% 667,700 $21,627,262 8/19/15 **As of 12/31/2024 purchased 724,671 for $29,132,283. 518,860 shares remain. History of Shares Repurchases 8

FFIEC BHC UBPR Data Return on Assets 1.61 1.22 1.32 1.12 1.00 0.88 0.93 0.91 0.85 0.91 0.93 0.90 0.90 0.98 0.94 0.79 0.71 0.73 '- 2016 2017 2018 2019 2020 2021 2022 2023 3Q24 FFC Peer Non-interest Income % Avg Assets FFIEC BHC UBPR Data 1.30 0.98 1.56 1.42 1.25 1.10 1.41 1.22 0.93 0.92 0.95 1.22 1.19 0.97 1.25 1.17 1.06 0.82 '- 2016 2017 2018 2019 2020 2021 2022 2023 3Q24 FFC Peer Better than Peer Performance 9

Net Interest Income Loan Growth Driving Growth in Income $107,857 $116,579 $131,652 $146,346 $143,401 $165,042 $167,262 $174,986 4.11% 4.32% 4.25% 4.05% 3.20% 3.55% 3.78% 3.71% 2.00% 3.00% 4.00% 5.00% 6.00% $0 $42,500 $85,000 $127,500 $170,000 $212,500 2017 2018 2019 2020 2021 2022 2023 2024 NII NIM $’s in (000’s) 10

Balance ($000) Commercial Loans By State Total $3,836,717 Diversified Loan Portfolio As of 12/31/24 Loan Portfolio Commercial 71.17% Consumer 21.15% Residential 7.68% Commercial $2,730,596 Consumer $811,622 Residential $294,499 IN 41.74% IL 10.05% KY 9.80% TN 26.73% GA 1.61% Other 10.07% 11

FFIEC BHC UBPR Data • Centralized committee structure • We are an in-market lender to clients • Disciplined underwriting Net Charge-offs 0.062% 0.049% 0.067% 0.056% 0.046% 0.144% 0.115% 0.033% 0.00% 0.04% 0.08% 0.11% 0.15% '- 800 1,600 2,400 3,200 4,000 4,800 5,600 1Q23 2Q23 3Q23 4Q23 1Q24 2Q24 3Q24 4Q24 Dollar ($000) % Total Loans 1.29% 1.28% 1.26% 1.26% 1.26% 1.20% 1.24% 1.22% 1.15% 1.20% 1.25% 1.30% 1.35% 35,000 36,250 37,500 38,750 40,000 41,250 42,500 43,750 45,000 46,250 47,500 1Q23 2Q23 3Q23 4Q23 1Q24 2Q24 3Q24 4Q24 Amount ($000) % Total Loans Reserves / Loans Non-Performing Assets NPA ($000) Total NPL’s / Total Loans Total NPA’s / Total Assets 4Q23 24,556 0.78% 0.51% 1Q24 24,252 0.76% 0.50% 2Q24 18,978 0.50% 0.39% 3Q24 17,179 0.38% 0.31% 4Q24 16,719 0.35% 0.30% Strong Asset Quality 12

Total Portfolio Loan Growth Strong Growth Strategy Driving Results $1,953,988 $2,656,390 $2,610,294 $2,815,895 $3,067,438 $3,167,821 $3,836,717 35.95% -1.74% 7.88% 8.93% 3.27% 21.12% -10.00% -5.00% 0.00% 5.00% 10.00% 15.00% 20.00% 25.00% 30.00% 35.00% 40.00% 45.00% 1,000,000 2,000,000 3,000,000 4,000,000 2018 2019 2020 2021 2022 2023 4Q24 Portfolio Balance Growth 6 Yr. CAGR = 11.90% $’s in (000’s) 13

Total Loans $811,622,382 97.14% Secured Consumer Loans 65.86% ≥ 700 FICO 20.48% ≥ 650 to 699 10.79% ≥ 600 to 650 2.87% < 600 (<1% No Score) 68.85% Indirect Auto ($558,708,648) 12.69% New ($70,900,127) 86.97% Used ($487,808,521) Asset Quality 30 – 89 day YTD Average Past Due 1.42% Consumer Loan Portfolio As of 12/31/24 $140,169,385 Home Equity 17.27% $91,282,654 Direct Auto 11.25% $558,708,648 Indirect Auto 68.84% $16,014,828 Other 1.97% $5,446,867 Credit Card 0.67% 14

$165,765,278 $95,019,127 Mortgage Loan Portfolio As of 12/31/24 Total Loans $294,499,334 53.17% YTD Production is Sold • $46.9 Million YTD New Production Sold • Average New Production LTV 79.22% • Average New Production FICO 738 • Average New Production DTI 35.37% • Average Loan Amount is $176,215 46.83% YTD Production is Portfolio • Underwritten to FHLMC Guidelines • Average Loan Amount of $290,679 • Average credit score 715 • Average DTI 35.99% • Average Amortized LTV 76.65% • Portfolio Updated LTV 50.8% • Average Portfolio Yield 5.54%, above Peer Avg. of 4.74% Asset Quality • YTD average past due 1.48% Fixed 35.96% $105,897,736 Avg. Yield of 5.00% Adjustable 64.04% $188,601,598 Avg. Yield of 5.85% 15

Commercial Portfolio Yield Analysis Well Positioned For Yield Expansion $222,727 $504,597 $77,410 $49,454 $38,635 $130,940 $224,801 $158,801 $237,784 7.405% 7.135% 4.958% 4.956% 4.852% 4.589% 4.930% 6.258% 6.232% 4.000% 4.250% 4.500% 4.750% 5.000% 5.250% 5.500% 5.750% 6.000% 6.250% 6.500% 6.750% 7.000% 7.250% 7.500% 7.750% 8.000% 25,000 75,000 125,000 175,000 225,000 275,000 325,000 375,000 425,000 475,000 525,000 575,000 Variable 1Q25 2Q25 3Q25 4Q25 2026 2027 2028 2029+ Balance Adjusting (000's) Balance Yield Avg. 4Q24 New Loan Rate = 6.972% Adjustable-Rate Portfolio 16

Commercial Portfolio Yield Analysis (Cont.) Well Positioned For Yield Expansion $132,936 $242,108 $183,247 $203,469 $298,298 5.540% 4.589% 4.930% 6.258% 5.367% 4.000% 4.250% 4.500% 4.750% 5.000% 5.250% 5.500% 5.750% 6.000% 6.250% 6.500% 6.750% 7.000% 7.250% 7.500% 7.750% 8.000% 50,000 75,000 100,000 125,000 150,000 175,000 200,000 225,000 250,000 275,000 300,000 325,000 2025 2026 2027 2028 2029+ Balance Due (000's) Balance Yield Fixed Rate Maturities Avg. 4Q24 New Loan Rate = 6.87% 17

Residential/Multi-Family39.01% Commercial Income Property 19.64% NOO Retail/Restaurants 12.01% Hotels and Motels 6.57% Owner Occupied CRE 8.23% Residential & Non-Residential Property Managers 2.72% Lessors of Other Real Estate Property 5.73% Mini-warehouses/Self Storage 1.65% Single Family Housing/Subdivisions 2.97% Land Development 1.48% Commercial Real Estate Loan Mix As a % of CRE (Period Ended 12/31/24) Residential/Multi-family $601,211,298 Commercial Income Property $302,741,830 NOO Retail $185,044,114 Owner Occupied CRE $126,777,132 Hotel/Motel $101,194,957 Lessors of Other Real Estate Property $88,260,394 Single Family Housing $45,724,485 Residential & Non-Residential Property Management $41,930,297 Mini-warehouse/Self-Storage $25,423,418 Land Development $22,805,250 Total $1,541,113,175 18

Agriculture 23.780% Construction 8.801% Health Services 7.239% Banking & Financial Services 4.074% Floor Plan & Auto Industry 3.477% Retail Eating Establishments 2.722% Real Estate Activites 4.884% Other Retail+Convenience 5.662% Transportation & Utilities 4.826% Manufacturing 4.277% Personal Services 12.431% Government Entities 7.095% Schools 1.276% Forestry, Oil/Gas & Energy 1.477% Religious Organizations 1.205% Amusement & Recreation 2.489% All Wholesale Distribution 2.071% All Other 2.215% Commercial & Industrial Loan Mix As a % of Total C & I Loans (Period Ended 12/31/24) Agriculture $282,861,111 Personal Services $147,866,716 Construction $104,681,218 Health Services $86,101,763 Government Entities $84,394,728 Other Retail + Convenience $67,350,666 Real Estate Activities $58,092,067 Transportation & Utilities $57,401,222 Manufacturing $50,870,101 Banking & Financial Services $48,456,527 Floor Plans & Auto Industry $41,356,092 Retail Eating Establishments $32,381,265 Amusement & Recreation $29,605,513 Wholesale Distribution $24,632,121 Forestry, Oil, Gas & Energy $17,573,323 Schools $15,179,978 Religious Organizations $14,334,170 Other (Including Private HH) $26,344,244 Total $1,189,482,825 19

Commercial Production Pipeline As of 12/31/24 Region Pipeline New Money Central $144,420,000 $63,158,000 West $218,381,000 $112,200,000 Southern $133,506,000 $121,325,000 Mid-South $447,731,000 $344,118,000 Indy / Ft. Wayne LPO $227,654,000 $183,282,000 East TN $13,913,000 $13,403,000 Total $1,185,605,000 $837,486,000 Production YTD Current Pipeline Dollars Region Term Production Line Production Central $115,557,598 $14,479,475 West $56,012,143 $4,780,000 Southern $111,543,671 $32,797,925 Mid-South $193,022,427 $28,072,820 Indy / Ft. Wayne LPO $103,443,752 $1,000,000 East TN $45,169,601 $26,417,577 Total $624,749,192 $107,547,797 Region Pipeline $ Terre Haute Market Area $38,172,000 Champaign, IL MSA Bloomington, IL MSA $71,997,000 Vincennes Market Area $34,121,000 Clarksville, TN / Nashville, TN / Murfreesboro, TN $194,768,000 Central Indiana / Indpls. MSA $152,289,000 Chattanooga/Knoxville $21,161,000 All Other Markets $319,978,000 Total $832,486,000 Current New Money Pipeline by Location 20

Strong Core Deposit Franchise Deposit Mix Cost of Deposits 0.16 0.23 0.32 0.50 0.32 0.18 0.36 1.23 1.86 0.45 0.54 0.75 0.95 0.54 0.20 0.44 1.74 2.36 '- 0.40 0.80 1.20 1.60 2.00 2.40 2.80 2016 2017 2018 2019 2020 2021 2022 2023 3Q24 YTD BHC UBPR Interest Expense FFC Peer FFIEC BHC UBPR Data Non-interest bearing Demand & Savings Time 69.1% 18.1% 12.8 Brokered CDs 0.0% Average account tenure 13.3 years Estimated uninsured deposits as 36.4% of total deposits Estimated uninsured less collateralized as 20.8% total deposits 0.17% 0.25% 0.37% 0.56% 0.36% 0.20% 0.38% 1.26% 1.84% 0.00% 0.45% 0.90% 1.35% 1.80% 2.25% 2016 2017 2018 2019 2020 2021 2022 2023 2024 21

$90,308 $88,747 $91,289 $104,348 $112,758$117,406 $126,023$130,176 $144,438 0 32500 65000 97500 130000 162500 2016 2017 2018 2019 2020 2021 2022 2023 2024 59.4 61.62 58.43 61.23 59.87 63.33 59.51 67.1 68.42 62.21 61.22 61.65 61.22 60.88 59.84 66.16 45.0 51.0 57.0 63.0 69.0 75.0 2016 2017 2018 2019 2020 2021 2022 3Q24 FFC Peer FFIEC BHC UBPR Data Non-interest Expense Efficiency Acquired HopFed Bancorp on 7/27/2019 Acquired Hancock Bancorp on 11/5/2021 Acquired SimplyBank on 7/1/2024 Disciplined Expense Management 22

$1.9 Billion Trust Assets Under Management Trust & Asset Management 2023 2024 Revenue ($000) 5,155 5,468 Income before Tax 1,258 1,777 Trust and Asset Management Trust Services include: • Professional Farm Management • Trust Administration • Estate Administration • Retirement Services • Corporate Trust Services 23

Well-positioned for sustainable and profitable growth • Diversified business model with strong risk management • High-caliber team members focused on customer service and technology optimization • Expanding presence in larger growth markets • Commercial banking focus with quality core deposits • Demonstrated ability to successfully complete mergers and acquisitions • Unblemished track record of delivering shareholder value • Over 30 consecutive years of increased shareholder dividends Key Investment Points 24

2020 2021 2022 2023 2024 Net Interest Income 146,346 143,401 165,042 167,262 174,986 Provision 10,528 2,466 <2,025> 7,295 16,166 Non-interest Income 42,476 42,084 46,716 42,702 42,772 Non-interest Expense 112,758 117,406 126,023 130,176 144,438 Net Income 53,844 52,987 71,109 60,672 47,275 Earnings Per Share (diluted) 3.93 4.02 5.82 5.08 4.00 Total Assets 4,557,544 5,175,099 4,989,281 4,851,614 5,561,786 Net Interest Margin 4.05 3.20 3.54 3.78 3.71 Return on Average Assets 1.25 1.10 1.41 1.26 0.92 Return on Average Equity 9.07 8.87 14.37 12.47 8.82 Dollars in millions except per share data 5-Year Financial Highlights 25

Norman D. Lowery President and CEO lowerynd@first-online.com 812.238.6185 Rodger A. McHargue Chief Financial Officer, SVP rmchargue@first-online.com 812.238.6334 Stephen P. Panagouleas Chief Credit Officer, SVP spanagouleas@first-online.com 812.238.6431 Thank You! : THFF