Core Viewpoint - Koppers Holdings Inc. has appointed James A. Sullivan as President and Chief Transformation Officer to lead a company-wide transformation initiative named Catalyst, aimed at enhancing performance and profitability [1][2][3]. Company Overview - Koppers Holdings Inc. is a global provider of treated wood products, wood treatment chemicals, and carbon compounds, employing approximately 2,100 people [5]. Leadership Changes - James A. Sullivan will oversee the Catalyst initiative, focusing on evaluating and executing opportunities to improve the company's performance across all dimensions [2][3]. - Sullivan has over 25 years of industry experience and has been with Koppers since June 2013, previously serving as President and Chief Operating Officer [4]. Transformation Initiative - The Catalyst initiative is designed to challenge the status quo and improve performance across the organization, with Sullivan leading a newly established Transformation Office [3][4]. - The organizational change allows Sullivan to focus on actions that will enhance margins and cash flow, aligning current strategies with the company's long-term goals for 2030 [3].

Company Overview - Koppers Holdings Inc. is an integrated global provider of treated wood products, wood treatment chemicals, and carbon compounds [2] - The company employs approximately 2,100 individuals and focuses on creating, protecting, and preserving essential infrastructure elements [2] - Key products include railroad crossties, utility poles, outdoor wooden structures, and production feedstocks for steel, aluminum, and construction materials [2] Recent Developments - Koppers will participate in the Barrington Research Spring Virtual Investment Conference on May 29, 2025, hosting meetings with the investment community [1] - Presentation materials related to the conference will be available on the company's Investor Relations section of its website [1]

Core Viewpoint - Koppers Holdings Inc. reported a loss of $13.9 million or 68 cents per share for Q1 2025, contrasting with a profit of $13 million or 59 cents per share in the same quarter last year. Adjusted earnings were 71 cents per share, up from 62 cents year-over-year and exceeding the Zacks Consensus Estimate of 56 cents [1][2]. Financial Performance - Revenues for Koppers in Q1 2025 were $456.5 million, down approximately 8% year-over-year, missing the Zacks Consensus Estimate of $488 million [2]. - The company ended the quarter with cash and cash equivalents of $33.3 million, a decrease of around 24% from the previous quarter. Long-term debt increased to $975.9 million, up about 5% sequentially [5]. Segment Highlights - The Railroad and Utility Products and Services (RUPS) segment saw sales rise about 4% year-over-year to $235 million, surpassing the consensus estimate of $230 million, driven by increased volumes and price rises [3]. - The Performance Chemicals (PC) segment recorded sales of $120.9 million, down around 20% year-over-year, falling short of the consensus estimate of $139 million due to reduced volumes [4]. - Sales from the Carbon Materials and Chemicals (CMC) division fell approximately 18% year-over-year to $100.6 million, missing the consensus estimate of $119 million, attributed to lower volumes and reduced prices [4]. Outlook - Koppers anticipates sales for 2025 to be in the range of $2 billion to $2.2 billion, slightly lower than the previous expectation of $2.17 billion, considering the competitive landscape and global economic conditions. The company expects adjusted EBITDA to be around $280 million and adjusted earnings per share to be $4.75 for 2025 [6]. - Capital expenditures are projected at $65 million for the year, with operating cash flows expected to be $150 million in 2025 [7]. Stock Performance - Koppers' shares have declined by 31.7% over the past year, compared to a 25.4% decline in the Zacks Chemicals Diversified industry [8].

Core Viewpoint - Koppers Holdings Inc. will participate in the B. Riley Securities Investor Conference on May 21, 2025, in Marina del Rey, California, with key management representation [1]. Company Overview - Koppers Holdings Inc. is an integrated global provider of treated wood products, wood treatment chemicals, and carbon compounds, employing 2,100 people [3]. - The company focuses on creating, protecting, and preserving essential infrastructure elements, including railroad crossties, utility poles, and outdoor wooden structures, while also producing feedstocks for steel, aluminum, and construction materials [3]. - Koppers emphasizes innovation and sustainability in its operations, aiming to provide safe solutions for rail transportation and power supply [3].

Financial Performance - Consolidated sales were $456.5 million, a decrease compared to $497.6 million in the prior year quarter[9] - Adjusted EBITDA increased to $55.5 million, compared to $51.5 million in the prior year quarter[9] - Adjusted EBITDA margin improved to 12.2%, up from 10.3% in the prior year quarter[9] - Diluted earnings per share (EPS) was $(0.68), compared to $0.59 in the prior year quarter[9] - Adjusted earnings per share (EPS) increased to $0.71, compared to $0.62 in the prior year quarter[9] Segment Performance - Railroad and Utility Products and Services (RUPS) sales increased to $235 million from $225.1 million[28, 94] - Performance Chemicals (PC) sales decreased to $120.9 million from $150.1 million[28, 94] - Carbon Materials and Chemicals (CMC) sales decreased to $100.6 million from $122.4 million[28, 94] Capital Allocation - Capital expenditures, net of insurance proceeds and sale of assets, were $10.0 million, compared to $25.8 million in the prior year quarter[9] - Share repurchases totaled $19.1 million in Q1[55] - The company declared a quarterly dividend of $0.08 per share[60] 2025 Guidance - The company forecasts sales of approximately $2.0 billion to $2.2 billion for 2025[78] - Adjusted EBITDA is projected to be around $280 million for 2025[80]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _________ to___________ Commission file number 1-32737 KOPPERS HOLDINGS INC. (Exact name of registrant as specified in its charter) Pennsylvania 20-1878963 (S ...

Financial Data and Key Metrics Changes - Consolidated sales for Q1 2025 were $456.5 million, down from $497.6 million in the prior year, representing a decrease of 8% [8][15] - Adjusted EBITDA for Q1 was $55.5 million, compared to $51.5 million in the prior year, with an adjusted EBITDA margin of 12.2%, up from 10.3% [9][16] - First quarter diluted loss per share was $0.68, compared to diluted earnings per share of $0.59 in the prior year, primarily due to restructuring charges [9] - Adjusted earnings per share for the quarter were $0.71, up from $0.62 in the prior year [10] - Cash flow used in operations was $22.7 million, including a $14 million payment related to the termination of the U.S. pension plan [10] Business Line Data and Key Metrics Changes - The RUPS business generated sales of $235 million, an increase of 4% year-over-year, driven by higher volumes and price increases [17] - Performance Chemicals (PC) sales decreased by 19.5% to $121 million, with a 21.5% volume decrease in wood treatment preservatives [15][19] - CMMC sales were $101 million, down from $122 million, impacted by lower volumes and prices [20] Market Data and Key Metrics Changes - Year-over-year first quarter crosstie procurement was down 19%, with treatment lower by 3% [18] - The average pricing of major products increased by 5% compared to the prior quarter, while average coal tar costs were higher by 6% [20] Company Strategy and Development Direction - The company is focusing on improving business performance and margins through cost structure adjustments and resizing the employee base [7][8] - The acquisition of Brownwood Preserving Company is expected to enhance product offerings and geographic reach [12][13] - The company aims to maintain a balanced approach to capital allocation, targeting $65 million in net capital expenditures for 2025 [21][22] Management's Comments on Operating Environment and Future Outlook - Management expressed concerns about economic uncertainty affecting discretionary spending on home projects, impacting the Performance Chemicals business [26] - The company anticipates a volume pickup in the second half of the year, driven by feedback from the market and increased activity in new geographic markets [28][52] - Despite challenges, management remains optimistic about long-term growth and profitability improvements across business segments [36] Other Important Information - The company reported a quarterly cash dividend of $0.08 per share, with an expected annual dividend of $0.32 per share for 2025, a 14% increase over 2024 [23] - The company has approximately $85 million remaining in its $100 million share repurchase program [22] Q&A Session Summary Question: How does the utility pole product mix help margins going forward? - The utility pole segment historically generates better margin performance, and growth in this area is expected to positively impact overall margins [42][43] Question: Is there still work to do on contracts with Class 1s? - There is still work to improve contracts, but the situation has improved compared to previous periods [45] Question: What drives the expected growth in the second half of the year? - Growth expectations are based on market feedback and increased activity in newer markets [51][52] Question: How will the company manage costs if sales trend towards the lower end of guidance? - The company has several cost measures in place to manage expenses and maintain EBITDA targets [63] Question: What are the priority uses of cash flow? - The focus is on share repurchases and deleveraging the balance sheet [72] Question: Are there attractive M&A opportunities due to economic uncertainty? - The company remains active in discussions for potential acquisitions, particularly in the utility and industrial products business [75][76] Question: Why not accelerate stock buybacks given the low share price? - There are limitations within credit agreements on annual buyback amounts, but the company is monitoring the situation for opportunities [82][84]

Financial Data and Key Metrics Changes - Consolidated sales for Q1 2025 were $456.5 million, down from $497.6 million in the prior year, representing an 8% decrease [7][14] - Adjusted EBITDA for Q1 was $55.5 million, compared to $51.5 million in the prior year, with an adjusted EBITDA margin of 12.2%, up from 10.3% [8][14] - First quarter diluted loss per share was $0.68, compared to diluted earnings per share of $0.59 in the prior year, primarily due to restructuring charges [8] - Adjusted earnings per share for the quarter were $0.71, up from $0.62 in the prior year [9] - Cash flow used in operations was $22.7 million, including a $14 million payment related to the termination of the U.S. pension plan [9] Business Line Data and Key Metrics Changes - The RUPS segment saw sales increase by $10 million or 4%, while the Performance Chemicals (PC) segment sales decreased by $29 million or 19.5%, and CMMC sales decreased by $22 million or 18% [14] - RUPS generated adjusted EBITDA of $26 million with an 11% margin, while PC delivered adjusted EBITDA of $20 million with a 17% margin [15] - CMMC sales were $101 million, down from $122 million in the prior year, but adjusted EBITDA improved to $10 million from $4 million due to lower raw material costs [18] Market Data and Key Metrics Changes - In the Performance Chemicals business, there was a 21.5% volume decrease in residential and industrial wood treatment preservatives in the Americas [17] - The average pricing of major products increased by 5% compared to the prior quarter, while average coal tar costs were higher by 6% [18] - Year-over-year, first quarter crosstie procurement was down 19% [16] Company Strategy and Development Direction - The company is focusing on improving business performance and margins through cost structure adjustments and resizing the employee base [6] - The acquisition of Brownwood Preserving Company is expected to enhance product offerings and geographic reach [11] - The company aims to maintain a balanced approach to capital allocation, targeting $65 million in net capital expenditures for 2025 [19][32] Management's Comments on Operating Environment and Future Outlook - Management expressed concerns about economic uncertainty affecting demand, particularly in the Performance Chemicals segment [23][24] - There is an expectation for a volume pickup in the second half of the year based on market feedback, despite worries about high interest rates [25][46] - The company anticipates consolidated sales of $2 billion to $2.2 billion in 2025, with adjusted EBITDA forecasted at $280 million [30][31] Other Important Information - The company was recognized for its sustainability efforts, being named to USA Today's list of America's climate leaders for the third consecutive year [12] - A quarterly cash dividend of $0.08 per share was declared, representing a 14% increase over the previous year's dividend [21] Q&A Session Summary Question: How does the utility pole product mix help margins going forward? - The utility pole business historically generates better margin performance, and growth in this area is expected to positively impact margins [38] Question: Are contracts with Class 1s satisfactory? - There is still work to be done on contracts, but the situation has improved [40] Question: What drives the expected growth in the second half of the year? - Feedback from the market indicates a volume pickup, along with increased activity in newer markets [46] Question: How does the company plan to manage costs if sales trend towards the lower end of guidance? - The company has several cost measures in place to maintain EBITDA guidance even with lower sales [57] Question: What are the priority uses of cash flow? - The focus is on share repurchases and deleveraging the balance sheet [68] Question: Are there attractive M&A opportunities due to economic disruption? - The company remains active in discussions for potential acquisitions, particularly in the utility and industrial products business [70] Question: Why not accelerate stock buybacks given the low share price? - There are limitations within credit agreements, but the company intends to be consistent in its share repurchase approach [78]

Core Viewpoint - Koppers (KOP) reported quarterly earnings of $0.71 per share, exceeding the Zacks Consensus Estimate of $0.56 per share, and showing an increase from $0.62 per share a year ago [1][2] Financial Performance - The earnings surprise for the quarter was 26.79%, while the previous quarter saw a negative surprise of -15.38% with actual earnings of $0.77 compared to an expected $0.91 [2] - Koppers' revenues for the quarter were $456.5 million, missing the Zacks Consensus Estimate by 6.46%, and down from $497.6 million year-over-year [3] Stock Performance - Koppers shares have declined approximately 19.3% since the beginning of the year, contrasting with the S&P 500's decline of -3.7% [4] - The current Zacks Rank for Koppers is 3 (Hold), indicating expected performance in line with the market in the near future [7] Future Outlook - The consensus EPS estimate for the upcoming quarter is $1.33 on revenues of $580 million, and for the current fiscal year, it is $4.25 on revenues of $2.17 billion [8] - The Chemical - Diversified industry, to which Koppers belongs, is currently ranked in the bottom 23% of over 250 Zacks industries, which may impact stock performance [9]

Exhibit 99.1 News Release FOR IMMEDIATE RELEASE For Information: Quynh McGuire Vice President, Investor Relations 412 227 2049 McGuireQT@koppers.com Koppers Holdings Inc. 436 Seventh Avenue Pittsburgh, PA 15219-1800 Tel 412 227 2001 www.koppers.com KOPPERS REPORTS FIRST QUARTER 2025 RESULTS; MAINTAINS 2025 OUTLOOK FOR ADJUSTED EBITDA AND EPS PITTSBURGH, May 9, 2025 – Koppers Holdings Inc. (NYSE: KOP), an integrated global provider of treated wood products, wood treatment chemicals, and carbon compounds, tod ...