S-Oil Q1 Profit Exceeds Expectations by 31%, Maintains Buy Rating with Target Price of KRW147,000

Overview

Goldman Sachs issued a research report on S-Oil Corp., maintaining Buy rating and 12-month target price of W147,000. The company's Q1 2026 operating profit was 31% above Goldman Sachs' estimate, driven mainly by higher-than-expected inventory-related gains and refining margin capture rate. Although Q2 may face pressures from crude premiums and rising logistics costs, strong product crack spreads could provide a buffer. The report suggests structural tightness in refining capacity until 2028 will benefit companies that secure feedstock supply and maintain utilization rates, translating into strong free cash flow.

Core views

Q1 outperformance: S-Oil's Q1 operating profit was 31% above Goldman Sachs' estimate, primarily driven by higher-than-expected inventory-related gains and refining margin capture rate. Notably, Q1 operating profit already accounts for 67% of Bloomberg's 2026 consensus operating profit, suggesting room for further upward revisions to full-year consensus estimates. Healthy Q2 outlook: Despite market focus shifting to Q2, where potential lack of inventory-related gains, persistently high crude premiums and logistics costs (including freight and insurance), and domestic fuel price caps may push operating profit lower QoQ, the company guides for healthy Q2 margins. Strong product crack spreads may offset higher costs, with throughput/utilization remaining stable. As of Q2, Singapore complex refining margins (net variable costs and Saudi crude premium) rose 198% QoQ, likely providing ample buffer against higher crude premiums and logistics costs. Strong H2 margins: Goldman Sachs' updated refining framework shows that even with recent de-escalation in Middle East tensions, refining margins should remain robust in H2. Updated supply-demand balances point to continued product tightness (especially diesel/jet) in H2, even if Strait of Hormuz traffic normalizes by quarter-end. Based on inventory-crack spread relationships, Goldman estimates baseline scenario (assuming Gulf exports normalize by end-June) fair value for Singapore complex refining margins at around $14/bbl by end-2026 (vs. mid-cycle $8/bbl), potentially reaching $18/bbl under prolonged disruption scenarios. Shaheen project to drive free cash flow inflection: The $7bn Shaheen project, expected to complete by mid-2026, should drive a meaningful free cash flow inflection, with 2027 free cash flow yield expected at 17%. Goldman believes S-Oil's current share price already discounts below mid-cycle diesel/jet cracks in 2027 and long-term lower chemical spreads from new Shaheen project (effectively assuming negative IRR for new chemical projects). Favorable risk-reward: Equity risk-reward remains favorable in Goldman's view due to: (1) strong middle distillate exposure (56% of product yield), Goldman's most preferred segment; (2) Shaheen project driving free cash flow inflection; (3) attractive current valuations.

Analysis framework

Goldman Sachs employs an updated refining framework to analyze industry supply-demand balances, focusing particularly on product tightness especially for diesel and jet fuel. Estimates fair value for Singapore complex refining margins based on inventory-crack spread relationships, with baseline scenario assuming Gulf exports normalize by end-June. Valuation methodology uses 6.5x 2028E EV/EBITDA multiple, discounting 2028 implied value back to 2027 at 10% cost of equity. Shaheen project's work-in-progress is valued separately using IRR scenarios. Goldman also analyzes S-Oil's product yield structure, highlighting its 56% middle distillate (diesel/jet) exposure - its most preferred product category. Simultaneously tracks company's free cash flow trends, net debt/equity ratio changes, and dividend-paying capacity.

Methodology notes

• Valuation MethodologyEV/EBITDA valuation

  Valuation based on 2028E EV/EBITDA multiple

  EV/EBITDA measures company valuation by comparing enterprise value to earnings before interest, taxes, depreciation and amortization. Goldman uses 6.5x 2028E multiple, discounting future value back to present, suitable for capital-intensive industries like refining.

• Industry Analysis FrameworkSupply-demand framework

  Structural refining capacity tightness until 2028

  Analyzing refining industry supply-demand balance to assess impact of capacity tightness on margins. Report notes structural refining capacity tightness until 2028 benefits companies securing feedstock supply.

• Industry Analysis FrameworkVolume-Price Breakdown

  Inventory-crack spread relationship analysis

  Estimating fair refining margins based on relationship between inventory levels and product crack spreads (difference between product prices and crude costs). Lower inventories typically support higher crack spreads.

• Company Fundamentals & Financial FrameworkFree cash flow analysis

  Free cash flow inflection post capex completion

  Analyzing company's capex cycle, where free cash flow sees inflection growth after major project completion. Shaheen project completion by mid-2026 could drive 2027 free cash flow yield to 17%.

• Event Gaming & Behavioral FinanceExpectation Gap/Management

  Q1 profit already accounts for 67% of full-year consensus

  When company's Q1 earnings already account for majority of market's full-year consensus, it typically implies room for upward revisions to full-year estimates - an application of expectation gap analysis.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• S-Oil Corp. (010950.KS)

  Beneficiary: High middle distillate exposure with secured feedstock supply and stable utilization in structurally tight refining environment; Shaheen project driving free cash flow inflection

  Strengths

  56% middle distillate yield, stable long-term crude supply and logistics, Shaheen project completion by mid-2026, attractive valuation

  Weaknesses

  Domestic fuel price caps may limit profits, potentially long-term weak chemical spreads

  Comparison

  Versus Asian refiners, S-Oil has higher middle distillate exposure (56%) vs. Thailand's PTT at 53% (diesel 42% + jet 11%)

  Risks

  Weaker-than-expected refining margins, Shaheen project delays, long-term weak chemical margins, stronger KRW vs. USD

Key data

• Q1 operating profit vs. Goldman estimate31% higherMainly driven by higher-than-expected inventory-related gains and refining margin capture rate
• Q1 operating profit as % of 2026 consensus67%Based on Bloomberg consensus, implying room for full-year consensus upgrades
• Q2 Singapore GRM QoQ changeUp 198%Net variable costs and Saudi crude premium, providing buffer against higher costs
• End-2026 Singapore GRM fair value (baseline)~$14/bblVs. mid-cycle $8/bbl
• End-2026 Singapore GRM fair value (disruption)Up to $18/bblUnder prolonged disruption scenario
• Middle distillate as % of product yield56%Diesel/jet exposure, Goldman's most preferred product category
• Shaheen project investment size$7bnExpected completion by mid-2026
• 2027E free cash flow yield17%Post Shaheen project completion driving free cash flow inflection
• Valuation multiple6.5x 2028E EV/EBITDADiscounted back to 2027 at 10% cost of equity
• 12-month target priceW147,000Current price W110,900, implying 32.6% upside

Impact & implications

For S-Oil, structural refining capacity tightness until 2028 benefits companies securing feedstock supply and maintaining utilization rates. The company's long-term crude supply and logistics arrangements, along with Korea's higher system inventory days, support stable operations. Korea has already secured over 80% of May-July crude import needs through diversified sources and may seek Venezuelan crude supply. For the industry, even with recent Middle East tensions easing, continued product tightness (especially diesel/jet) in H2 should support robust refining margins.

Risks

• Weaker-than-expected refining margins
• Shaheen project construction and commissioning delays
• Long-term weak chemical margins
• Stronger-than-expected KRW vs. USD

What to watch

• Q2 operating profit and margin performance
• Singapore complex refining margin (GRM) trends
• Shaheen project completion progress and commissioning
• Middle East conflict evolution and Strait of Hormuz traffic
• 2026 full-year operating profit consensus estimate adjustments
• Government confirmation of domestic fuel price compensation mechanism