Slide 1: Second Quarter 2026
Second Quarter 2026 August 5, 2026 — 11 a.m. ET
Slide 2: Legal Discussion
Legal Discussion Continuing Operations Financial results are presented on a continuing operations basis, which excludes the Advanced Materials & Catalysts business, which was sold effective December 31, 2025. Forward-Looking Statements Some of the information contained in this presentation, the conf
Slide 3: Legal Discussion - Supply Share and Industry Information
Legal Discussion Supply Share and Industry Information Certain statistical information used in this presentation is based on independent industry publications, reports by research firms or other published independent sources. Some statistical information is also based on our good faith estimates whi
Slide 4: Key Messages - Second Quarter 2026
Key Messages - Second Quarter 2026 1 High refinery utilization and positive alkylate economics contributed to increased volume for regenerated sulfuric acid 2 Virgin sulfuric acid volume increased by a double digit percentage based on demand growth and contribution of acquired Waggaman assets 3 Adju
Slide 5: Strategy Execution - Building Platform of Leading Sulfur Solutions
Strategy Execution - Building Platform of Leading Sulfur Solutions SECOND QUARTER EARNINGS 2026 / 5
Slide 6: Demand Trends and Outlook
Demand Trends and Outlook 1. Short-term outlook 3-6 months 2. Long-term outlook > 12 months SECOND QUARTER EARNINGS 2026 / 6
Slide 7: Second Quarter 2026 Financial Performance
Second Quarter 2026 Financial Performance
Slide 8: Key Highlights - Continuing Operations
Key Highlights - Continuing Operations Q2 2026 Key Highlights $250 Mln $53 Mln $13 Mln Sales Adj. EBITDA Adjusted Free Cash Q2 2026 Q2 20261 Flow1,2 $146 Mln 2.0x $176 Mln Share Repurchase Net Debt Leverage Liquidity4 Authorization Remaining Ratio1,3 1. See Appendix for reconciliations of Non-GAAP f
Slide 9: Financial Performance - Q2 2026
Financial Performance - Q2 2026 Second Quarter Financial Results - Continuing Operations Second Second $ % Quarter Quarter $ % ($ in millions) Change Change ($ in millions) 2026 2025 Change Change Sales Change Factors 73.9 42.0 Sales 250.0 176.1 73.9 42.0 Volume 16.4 9.3 Net Income 10.7 5.0 5.7 114.
Slide 10: Adjusted EBITDA Bridge - Q2 2026
Adjusted EBITDA Bridge - Q2 2026 Increase in Adjusted EBITDA1 reflects favorable net pricing and higher sales volume, including the contribution from the acquired Waggaman sulfuric acid assets, partially offset by higher manufacturing costs, driven by general inflation and increased transportation c
Slide 11: Cash & Leverage
Cash & Leverage 1,4 Adjusted Free Cash Flow Net Debt Leverage Ratio 4 $78.1 $55.0 2 2.0x $12.8 $45.0 1.2x 1.2x $(2.4) 2025 June YTD June YTD 2026 2025 2026 Guidance 12/31/2025 3/31/2026 6/30/2026 Cash Generation Debt Profile • June YTD Adjusted Free Cash Flow1,4 of • Gross debt of $497 million $12.8
Slide 12: Balanced Capital Allocation Strategy
Balanced Capital Allocation Strategy SECOND QUARTER EARNINGS 2026 / 12
Slide 13: Revised 2026 Outlook
Revised 2026 Outlook ($ in millions, Prior 2026 Revised 2026 except per share) 2025 Actual Outlook Outlook* Net Sales $724 $890 - $970 $1,020 - $1,060 Adjusted EBITDA1 $172 $180 - $195 $195 - $207 Adjusted Free Cash Flow1,2 $78 $40 - $55 $45 - $55 Capital Expenditures $68 $80 - $90 $85 - $95 Interes
Slide 14: Ecovyst 2026 Outlook
Ecovyst 2026 Outlook Q3 Directional Guidance • Project higher regenerated sulfuric acid volume vs. Q3'25 • Project virgin sulfuric acid volume to be slightly lower Ecoservices Anticipated Turnaround Schedule than Q3'25 Q1 2024 Q2 2024 Q3 2024 Q4 2024 • Expect higher turnaround costs compared to Q3'2
Slide 15: Summary
Summary 1 Maintaining stable demand outlook for balance of 2026 Raising 2026 Adjusted EBITDA guidance on favorable H1'26 results and 2 positive outlook for legacy business, and to reflect anticipated contribution from Calabrian in H2'26 3 Integration of Calabrian business underway Net Debt leverage
Slide 16: Appendix
APPENDIX
Slide 17: Ecovyst Products and Services
Ecovyst Products and Services SECOND QUARTER EARNINGS 2026 / 17
Slide 18: Demand Drivers
Demand Drivers SECOND QUARTER EARNINGS 2026 / 18
Slide 19: Sales and Adjusted EBITDA Major Change Factors
Sales and Adjusted EBITDA Major Change Factors Sales Sales Three months ended Six months ended (in $ millions and %) June 30, 2026 June 30, 2026 Sales: $ % $ % Volume 16.4 9.3 48.5 15.2 Price/Mix 57.5 32.7 97.2 30.4 Sales Change 73.9 42.0 145.7 45.6 Adjusted EBITDA Adj. EBITDA Three months ended Six
Slide 20: Reconciliation of Net Income from Continuing Operations to Adjusted EBITDA
Reconciliation of Net Income from Continuing Operations to Adjusted EBITDA from Continuing Operations Three months ended Twelve months ended ($ in millions, except %) June 30, 2026 June 30, 2025 March 31, 2026 June 30, 2026 December 31, 2025 Reconciliation of net income from continuing operations to
Slide 21: Reconciliation of Net Income from Continuing Operations to Adjusted Net Income
Reconciliation of Net Income from Continuing Operations to Adjusted Net Income Three months ended ($ in millions, except share and per share amounts) June 30, 2026 June 30, 2025 Reconciliation of net income from Tax Per share, Per share, Tax Per share, Per share, continuing operations to Adjusted Pr
Slide 22: Reconciliation of Net Income from Continuing Operations to Adjusted Net Income
Reconciliation of Net Income from Continuing Operations to Adjusted Net Income Year ended ($ in millions, except share and per share amounts) December 31, 2025 Reconciliation of net income from Tax expense Per share, Per share, continuing operations to Adjusted Net Pre-tax (benefit) After-tax basic
Slide 23: Descriptions for reconciliation of Non-GAAP financial measures
Descriptions for reconciliation of Non-GAAP financial measures (a) When asset disposals occur, we remove the impact of net gain/loss of the disposed asset because such impact primarily reflects the non-cash write-off of long-lived assets no longer in use. (b) Relates to certain transaction costs, in
Slide 24: Adjusted Free Cash Flow
Adjusted Free Cash Flow Six months ended Six months ended Full Year ($ in millions) June 30, 2026 June 30, 2025 2025 Net cash provided by operating activities 51.3 43.3 140.3 Less: Purchases of property, plant and equipment1 44.8 49.5 91.5 Free Cash Flow 6.5 (6.2) 48.8 Cash paid for debt financing c
Slide 25: Net Debt Leverage Ratio - Continuing Operations
Net Debt Leverage Ratio - Continuing Operations ($ in millions, except %) June 30, 2026 March 31, 2026 December 31, 2025 Total debt 497.1 397.1 397.1 Less: Cash and cash equivalents 87.8 162.6 197.2 Net debt 409.3 234.5 199.9 Trailing twelve months: Net income from continuing operations 25.8 20.1 6.
Slide 26: Driving Progress
Driving Progress BY DELIVERING RELIABLE SULFUR SOLUTIONS FOR CLEAN FUELS AND CRITICAL MATERIALS