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ADVANSIX Good chemistry . August 7 , 2026 2Q 2026 Earnings Presentation ADVANSIX
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2 © 2026 AdvanSix Inc. All Rights Reserved. Forward Looking Statements This presentation contains certain statements that may be deemed “forward-looking statements” within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other than statements of historical fact, that address activities, events or developments that our management intends, expects, projects, believes or anticipates will or may occur in the future are forward-looking statements. Forward-looking statements may be identified by words such as "expect," "anticipate," "estimate," “outlook,” "project," "strategy," "intend," "plan," "target," "goal," "may," "will," "should" and "believe" and other variations or similar terminology and expressions. Although we believe forward-looking statements are based upon reasonable assumptions, such statements involve known and unknown risks, uncertainties and other factors, many of which are beyond our control and difficult to predict, which may cause the actual results or performance of the Company to be materially different from any future results or performance expressed or implied by such forward-looking statements. Such risks and uncertainties include, but are not limited to: general economic and financial conditions in the U.S. and globally; the potential effects of inflationary pressures, tariffs or the imposition of new tariffs, trade wars, barriers or restrictions, or threats of such actions, changes in interest rates, labor market shortages and supply chain issues; instability or volatility in financial markets or other unfavorable economic or business conditions caused by geopolitical concerns, including as a result of new or proposed legislation or regulatory, trade or other policies in or impacting the U.S., the conflict between Russia and Ukraine, the conflicts in the Middle East, as well as any related uncertainty in the surrounding region, and the possible expansion of such conflicts; the effect of any of the foregoing on our customers’ demand for our products and our suppliers’ ability to manufacture and deliver our raw materials, including implications of reduced refinery utilization in the U.S.; our ability to sell and provide our goods and services; the ability of our customers to pay for our products; any closures of our and our customers’ offices and facilities; risks associated with increased phishing, compromised business emails and other cybersecurity attacks, data privacy incidents and disruptions to our technology infrastructure; risks associated with potential use of artificial intelligence in our operations or those of third party service providers; risks associated with operating with a reduced workforce; risks associated with our indebtedness including compliance with financial and restrictive covenants, and our ability to access capital on reasonable terms, at a reasonable cost, or at all, due to economic conditions or otherwise; the impact of scheduled turnarounds and significant unplanned downtime and interruptions of production or logistics operations as a result of mechanical issues or other unanticipated events such as fires, severe weather conditions, natural disasters, pandemics, geopolitical conflicts and related events; price fluctuations, cost increases and supply of raw materials; our operations and growth projects requiring substantial capital; growth rates and cyclicality of the industries we serve including global changes in supply and demand; failure to develop and commercialize new products or technologies; loss of significant customer relationships; adverse trade and tax policies; extensive environmental, health and safety laws that apply to our operations; hazards associated with chemical manufacturing, storage and transportation; litigation associated with chemical manufacturing and our business operations generally; inability to acquire and integrate businesses, assets, products or technologies; protection of our intellectual property and proprietary information; prolonged work stoppages as a result of labor difficulties or otherwise; failure to maintain effective internal controls; our ability to declare and pay quarterly cash dividends and the amounts and timing of any future dividends; our ability to repurchase our common stock and the amount and timing of any future repurchases; disruptions in supply chain, transportation and logistics; potential for uncertainty regarding qualification for tax treatment of our spin- off; fluctuations in our stock price; and changes in laws or regulations applicable to our business. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this presentation. Such forward-looking statements are not guarantees of future performance, and actual results, developments and business decisions may differ materially from those contemplated by such forward-looking statements as a result of a number of risks, uncertainties and other factors including those noted above and those identified in our filings with the Securities and Exchange Commission (SEC), including the risk factors in Part 1, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2025, as updated in subsequent reports filed with the SEC. All subsequent written or oral forward-looking statements attributable to us or persons acting on our behalf are qualified in their entirety by this paragraph. We do not undertake to update or revise any of our forward-looking statements. Non-GAAP Financial Measures This presentation includes certain non-GAAP financial measures intended to supplement, not to act as substitutes for, comparable GAAP measures. Reconciliations of non-GAAP financial measures to GAAP financial measures are provided in this presentation, except with respect to forward-looking non-GAAP measures, where such reconciliation is not available without unreasonable effort as the Company is unable to predict with reasonable certainty the occurrence or amount of all adjustments or other potential adjustments that may arise, which can be dependent on future events. Investors are urged to consider carefully the comparable GAAP measures and the reconciliations to those measures provided. Non-GAAP measures in this presentation may be calculated in a way that is not comparable to similarly-titled measures reported by other companies.
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3 © 2026 AdvanSix Inc. All Rights Reserved. AdvanSix Strategic Priorities Controllable Levers Anchor Through-Cycle Value Creation to Support Total Shareholder Return Commercial Execution Disciplined Capital Deployment ➢ Winning with customers to profitably fill our plants ➢ Product mix shift to higher value applications in attractive markets ➢ Actions and pricing mechanisms to recover raw material cost inflation ➢ Generating meaningful operating cash flow ➢ Asset optimization and platform integration for evolving value chain dynamics ➢ Discretionary capital investments targeting 20%+ IRR hurdle rates • Strong cash conversion cycle performance • 45Q carbon capture tax credits • SUSTAIN program generating 30%+ IRR; Progressing DEF growth project opportunity to unlock value • 2Q26 price/raws neutral year-over-year • Near record domestic granular ammonium sulfate volume for the 2025/2026 fertilizer year • Maintaining margin expansion across Nylon Solutions and Chemical Intermediates Operational Excellence ➢ Risk-based prioritization of Capex supports safe, stable, and sustainable operations while optimizing cash generation ➢ Continuous improvement is a productivity engine for agility and efficiency • Turnaround scoping and prioritized Capex supports improvement in earnings and cash conversion through the cycle • Non-manpower fixed cost reduction program targeting $30M annual savings by 2027
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4 © 2026 AdvanSix Inc. All Rights Reserved. 2Q 2026 Results Summary Significant Sequential Improvement vs. 1Q26; Farmer Economics Impacting Fertilizer Demand What We Expected 2Q Results 1 • Sequential improvement in net pricing over raw material costs following first quarter headwinds • Strong pricing across Plant Nutrients, Chemical Intermediates and Nylon Solutions more than offset rising Sulfur, Propylene and Benzene costs; Natural gas prices seasonally lower in 2Q26 vs. 1Q26 2 • Optimizing Nylon Solutions production output, inventories and sales volume mix given current market environment • Favorable commercial performance across all key nylon end markets supporting margin expansion 3 • Chemical Intermediates performance consistent with cycle averages • Holding margins with price appreciation and improved operational performance 4 • Balanced U.S. Ammonium Sulfate (AS) supply and demand fundamentals in heart of domestic planting season • More challenging farmer profitability and affordability environment leading to reduction in fertilizer purchases in the quarter; Over the fertilizer year (July 2025 – June 2026), still delivered near record AS Domestic Granular volume performance 5 • Execute planned turnaround and run plants at targeted operating rates • Turnaround executed to plan (at low end of targeted range); Utilization rates, particularly at Hopewell, lower than anticipated /
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5 © 2026 AdvanSix Inc. All Rights Reserved. $1.24 ($0.50) $0.19 2Q25 1Q26 2Q26 ($1.05) Free Cash FlowAdjusted EPS 2Q 2026 Financial Summary See Appendix in this presentation for a reconciliation of Adjusted EBITDA, Adjusted EBITDA Margin, Adjusted EPS and Free Cash Flow, which are non-GAAP measures $410 $404 $421 2Q25 1Q26 2Q26 +3% (43%) Adjusted EBITDASales Adjusted EBITDA Margin 13.6% 1.2% 7.6% GAAP Net Income $31.4 ($15.5) GAAP EPS $1.15 ($0.58) $3.2 $0.12 Highlights • Sales YoY: Price +18%, Volume (15%) – Raw Material Pass Through Pricing +13% – Market-Based Pricing +5% • Higher pricing across each product line offsets input cost increases, notably sulfur • Lower ammonium sulfate sales volume amid softer agriculture market fundamentals to end spring planting season • Reduced production output including timing of plant turnarounds • Lower SG&A expense, as planned • 2Q26 effective tax rate of 51.2% vs. 2Q25 effective tax rate of 0.9% – 1H26 effective tax rate of 12.3% vs. 1H25 effective tax rate of 9.7% – Prior year tax rate reduced by 45Q carbon capture tax credits claimed • 2Q26 Cash Flow From Operations of $10M, down ($11M) vs. prior year primarily due to lower Net Income • 2Q26 Capex of $21M, down ($8M) vs. prior year, as planned ($M, except per share amounts) $56 $5 $32 2Q25 1Q26 2Q26 ($7) ($51) ($11) 2Q25 1Q26 2Q26 ($4)
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6 © 2026 AdvanSix Inc. All Rights Reserved. 157 141 131 2Q25 1Q26 2Q26 Plant Nutrients 2Q 2026 Sales By Product Line Sales Product Price +18% Volume (15%) Nylon CPL PN CI YoY Sales +3% QoQ Sales +4% Price +17% Volume (13%) • Pricing improvement across the portfolio supported by higher raw material pass- through as well as an increase in market-based pricing • Lower volume for Plant Nutrients driven by challenging farmer economics • Nylon resin volumes up year-over-year driven by continued improved operational performance • Continued subdued industrial end market demand impacting volumes overall ($M) (16%) YoY Raw Materials Pass Through +13%, Market-Based +5% QoQ Raw Materials Pass Through +12%; Market-Based +5% 107 107 127 2Q25 1Q26 2Q26 Chemical Intermediates +18% 80 88 100 2Q25 1Q26 2Q26 Nylon +26% 66 68 63 2Q25 1Q26 2Q26 Caprolactam (6%) % Formula / Index ~40% ~85% ~0% ~60%
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7 © 2026 AdvanSix Inc. All Rights Reserved. $56 $32 $72 $72 $17 $4 $3 2Q25 Price Raws Volume Plant Turnaround Other 2Q26 2Q 2026 Adjusted EBITDA Bridge Net Pricing Offset Raw Material Costs; Lower Sales Volume in Plant Nutrients and Reduced Production Output ($M) See Appendix in this presentation for a reconciliation of Adjusted EBITDA, which is a non-GAAP measure $26 • Higher raw material pass-through pricing in Nylon Solutions and Chemical Intermediates; Favorable Plant Nutrients market-based pricing • Higher benzene, sulfur and propylene costs; Natural gas costs modestly lower • More challenging agricultural fundamentals including farmer economics resulted in a reduction of in-season fertilizer purchases • Timing of planned plant turnarounds and reduced production output • Benefit from lower SG&A spend as planned Business Drivers Year-over-Year Quarter-over-Quarter EBITDA Impact ($M) 1Q26 2Q26 1Q26 2Q26 Gross Raws ($18) ($72) ($38) ($34) Gross Price $4 $72 $28 $73 Net Price / Raws ($14) $0 ($10) $39 Net Price / Raws
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8 © 2026 AdvanSix Inc. All Rights Reserved. 1H 2025 1H 2026 Net Income $55 ($12) Depreciation & Amortization $39 $42 Total Working Capital* ($47) ($27) Taxes / Other ($14) ($8) Net Cash From Operations $33 ($5) Base Capex ($53) ($48) Growth & Cost Savings Capex ($9) ($9) Total Capex ($62) ($57) Free Cash Flow ($30) ($62) Cash Flow Summary 1H 2026 Seasonal Use of Cash as Expected; Targeting Sequential Improvement in 2H 2026 ($M) See Appendix in this presentation for a reconciliation of Free Cash Flow, which is a non-GAAP measure • 2026 year-to-date performance largely tracking to 2025 year-to-date, net of ~$26M of insurance proceeds in the prior year period • 1H 2026 Free Cash Flow impacted by earnings and expected seasonal working capital use of cash, including the unwinding of prior year ammonium sulfate pre-buy cash advances • Capex run-rate reduced in 2Q26; Continue to expect Capex of $75 - $95M for full year 2026, reflecting risk-based prioritization of base investments • Expect tailwinds in 2H 2026, including working capital, timing of annual payments, ammonium sulfate pre-buy cash advances and 45Q cash tax optimization • Resilient balance sheet, disciplined leverage and ~$230M of liquidity at quarter-end support capital deployment optionality Cash Flow Generation * Working Capital includes Accounts and other receivables, Inventories, Accounts payable, and Deferred income and customer advances
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9 © 2026 AdvanSix Inc. All Rights Reserved. Plant Nutrients / Sulfur Dynamics 3rd Party Forecasts Calling For Sulfur Raw Material Price Declines Beginning in 4Q26 Supporting AdvanSix Earnings Market Dynamics – Challenging multi-year farmer economics and profitability – 2026 Spring planting saw significant increase in grower input costs while crop and grain prices remained steady at lower levels, unfavorably impacting farmer profitability and resulting in a reduction of fertilizer consumption overall – Elevated sulfur prices, amplified by conflict in Middle East, creating demand headwinds across the industry – most notably in Phosphates – Sulfur prices anticipated to moderate toward historical ranges beginning in 4Q26 and extending into 2027 AdvanSix Competitive Position ✓ Ammonia and sulfuric acid platform integration coupled with leading technology position ✓ Structural improvement in the sulfur value proposition aligned with customer feedback and third-party industry research ✓ Fertilizer-year domestic granular AS sales volumes approached record levels, supported by SUSTAIN growth program for domestic farming community ✓ Well positioned to benefit from sulfur cost normalization Sulfur Price sensitivity for AdvanSix: For every $100/lt change in sulfur raw material price = ~$35M annualized cost impact Source: CRU $165 $705 $329 $0 $100 $200 $300 $400 $500 $600 $700 $800 1Q25 2Q25 3Q25 4Q25 1Q26 2Q26 3Q26 4Q26E 1Q27E 2Q27E 3Q27E 4Q27E Sulfur Price ($/lt) Tampa Sulfur Price 5-year Historical Avg
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10 © 2026 AdvanSix Inc. All Rights Reserved. Diversified End Market Exposure Ag / Fertilizer Packaging Building & Construction Plastics Solvents End Market ASIX Exposure End Market Performance / Outlook - AIA forecasting ~3% commercial construction growth in 2026 and 3.5% growth in 2027 - New builds / home sales yet to significantly recover in current interest rate environment - Continued soft demand for auto, consumer durables and other industrial applications +Acetone anti-dumping duties into U.S. renewed for another 5 years - Moderated growth in construction, pharmaceutical and electronics industries - Inflationary pressure and tariffs impacting demand for U.S. red meats +Higher nitrogen pricing environment; Sulfur nutrition demand growing 3-4% - Caution around North American crop prices and farmer profitability - Meaningfully higher sulfur input costs + Positive Mixed Weak
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11 © 2026 AdvanSix Inc. All Rights Reserved. 2H 2026 Considerations Drivers In Place To Support 2H 2026 Sequential EBITDA and Cash Flow Improvement vs. 1H 2026 ▲ Operational tailwinds – absence of 1Q26 Winter Storm impact and completion of larger planned plant turnaround in 2Q26 support 2H 2026 earnings improvement ▲ Non-manpower fixed cost takeout – expected to support improved profitability (targeting ~$30M of savings by end of 2027) ▲ Nylon Solutions – steady volume performance expected; Driving price/raws expansion ↔ Chemical Intermediates – maintaining cycle average acetone-propylene spreads ▼ Plant Nutrients – North American fill program expected to drive 3Q26 sequential domestic pricing decline amid competitive dynamics and continued higher sulfur input cost environment ▲ Ammonium Sulfate pre-buy cash advances – expect cash advances in 4Q26 for typical pre-buy program ▲ Payment timing – timing of annual payments paid in 1H26 (i.e. insurance premiums) ▲ Capex – reduced run-rate on spend in 2H 2026 vs. 1H 2026 supporting free cash flow generation and conversion ▲ 45Q cash tax optimization – working toward receipt of first tranche of 45Q carbon capture tax credits 2H 2026 vs. 1H 2026 EBITDA Considerations 2H 2026 vs. 1H 2026 Cash Considerations
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12 © 2026 AdvanSix Inc. All Rights Reserved. Compelling Investment Thesis Value Drivers Supporting Through-Cycle Profitability and Sustainable Performance Durable Competitive Advantage Portfolio Resiliency Long-Term Positioning ✓ Leading global cost advantage in vertically integrated caprolactam production – unique combination of assets and business model core to our advantage ✓ Largely insulated from reciprocal tariff impacts with ~90% of sales in the U.S.; Anti-dumping duties in place for ammonium sulfate and acetone in the U.S. ✓ Announced European capacity rationalization in phenol/ acetone and caprolactam/ ammonium sulfate as well as reduced China output ✓ Ammonia and Sulfuric Acid platform integration coupled with leading technology position underpins SUSTAIN Ammonium Sulfate granular growth and potential DEF expansion ✓ Product mix and asset utilization agility enable navigation through multitude of cycles ✓ 45Q carbon capture tax credits and tax legislation meaningfully benefit cash flow ✓ Healthy balance sheet provides optionality for further value creation
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APPENDIX
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14 © 2026 AdvanSix Inc. All Rights Reserved. Key Performance Indicators / Industry Metrics KPIs / Industry Metrics 2Q25 1Q26 2Q26 3Q26E Input Costs U.S. Benzene ($/MT) ~$770 ~$950 ~$1,300 $1,250-$1,300 U.S. Polymer Grade Propylene (c/lb) ~$0.38 ~$0.39 ~$0.52 $0.43-$0.46 Tampa Sulfur ($/LT) $270 $496 $655 $705 NYMEX Natural Gas ($/MMBtu) $3.44 $5.04 $2.90 $2.90(1) Pricing & Spreads AS Corn Belt Price ($/ST) ~$470 ~$425 ~$475 $350-$375(2) NA Resin – BNZ ($/MT) ~$1,350 ~$1,200 ~$1,500 $1,800-$1,850 Asia CPL – BNZ ($/MT) ~$600 ~$700 ~$900 $975-$1,000 Acetone – Small/Medium Buyer (c/lb) ~$0.59 ~$0.52 ~$0.80 $0.66-$0.68 Acetone – Large Buyer (c/lb) ~$0.50 ~$0.48 ~$0.65 $0.54-$0.56 Source: Green Markets, A Bloomberg Company, Tecnon Orbichem, Wood Mackenzie, and Chemical Market Analytics (1) Pricing as of 7/31/26 (2) QTD average pricing as of 7/31/26 • Working actions and pricing mechanisms to recover inflationary raw material cost pressures • Benzene and propylene prices expected to decrease in 3Q26; Trades promptly following underlying crude oil • Sulfur quarterly benchmarks continue to move higher on global supply tightness • Natural gas prices seasonally lower in 2Q26
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15 © 2026 AdvanSix Inc. All Rights Reserved. Planned Plant Turnarounds 1Q 2Q 3Q 4Q FY Primary Unit Operation 2017 -- ~$10M ~$4M ~$20M ~$34M Sulfuric Acid 2018 ~$2M ~$10M ~$30M -- ~$42M Ammonia 2019 -- ~$5M ~$5M ~$25M ~$35M Sulfuric Acid 2020 ~$2M ~$7M ~$20M ~$2M ~$31M Ammonia 2021 ~$3M ~$8M -- ~$18M ~$29M Sulfuric Acid 2022 ~$1M ~$5M ~$44M(2) -- ~$50M Ammonia 2023 ~$2M ~$1M ~$27M -- ~$30M Sulfuric Acid 2024 ~$5M ~$3M ~$3M ~$47M(3) ~$58M Ammonia 2025 ~$5M ~$6M -- ~$14M ~$25M Sulfuric Acid 2026E -- ~$10M -- ~$7M ~$17M Ammonia • Timing driven by compliance, inspection and sustaining asset base • Critical to supporting high utilization rates • Dedicated teams to improve effectiveness • Staggered across unit operations to maintain output • Proactive maintenance capex prioritized to mitigate risk and support safe, stable and sustainable operations (1) Primarily reflects the impact of fixed cost absorption, maintenance expense, and the purchase of feedstocks which are normally manufactured by the Company. (2) During the multi-site planned plant turnaround, additional required maintenance at our Frankford phenol plant contributed to reduced production across our integrated value chain and a delayed ramp to full operating rates at our Hopewell and Chesterfield sites, resulting in an incremental $15M unfavorable impact to pre-tax income, which is reflected in this amount and is inclusive of fixed cost absorption, higher maintenance expense and lost sales. (3) During the multi-site planned plant turnaround, additional required maintenance at our Hopewell plant contributed to reduced production across our integrated value chain and a delayed ramp to full operating rates, resulting in an incremental ~$17M unfavorable impact to pre-tax income, which is reflected in this amount and is inclusive of fixed cost absorption, higher maintenance expense, and lost sales. Pre-Tax Income Impact by Quarter (1)
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Reconciliation of Non-GAAP Measures to GAAP Measures
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17 © 2026 AdvanSix Inc. All Rights Reserved. Reconciliation of Net Cash Provided by Operating Activities to Free Cash Flow (in $ thousands) The Company believes that this metric is useful to investors and management as a measure to evaluate our ability to generate cash flow from business operations and the impact that this cash flow has on our liquidity. The Company believes the non-GAAP financial measures included in this presentation provide meaningful supplemental information as they are used by the Company’s management to evaluate the Company’s operating performance, enhance a reader’s understanding of the financial performance of the Company, and facilitate a better comparison among fiscal periods and performance relative to its competitors, as these non-GAAP measures exclude items that are not considered core to the Company’s operations. (1) Free cash flow is a non-GAAP measure defined as Net cash provided by operating activities less Expenditures for property, plant and equipment.
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18 © 2026 AdvanSix Inc. All Rights Reserved. Reconciliation of Net Income to Adjusted EBITDA (in $ thousands) The Company believes the non-GAAP financial measures included in this presentation provide meaningful supplemental information as they are used by the Company’s management to evaluate the Company’s operating performance, enhance a reader’s understanding of the financial performance of the Company, and facilitate a better comparison among fiscal periods and performance relative to its competitors, as these non-GAAP measures exclude items that are not considered core to the Company’s operations. (2) Adjusted EBITDA margin is defined as Adjusted EBITDA divided by Sales
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19 © 2026 AdvanSix Inc. All Rights Reserved. Reconciliation of Earnings Per Share to Adjusted Earnings Per Share The Company believes the non-GAAP financial measures included in this presentation provide meaningful supplemental information as they are used by the Company’s management to evaluate the Company’s operating performance, enhance a reader’s understanding of the financial performance of the Company, and facilitate a better comparison among fiscal periods and performance relative to its competitors, as these non-GAAP measures exclude items that are not considered core to the Company’s operations. (in $ thousands except share and per share amounts)