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425
DELEK US HOLDINGS, INC. filed this Form 425 on 12/04/2017
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Gulf Coast primarily configured to heavy crude oil limiting ability to process lighter barrels Refinery Configuration can Limit Crude Oil Slate Flexibility 7  Heavy crude oil refineries cannot easily digest the increased diesel and lighter content of light crudes like WTI  Equipment limits are reached quickly:  Crude Tower Diameter  Crude Heater \ Heat Exchange  LPG & Light Naphtha Handling  Significant impact on effective refinery capacity as light crude oil is increased  High margin conversion units generally are underutilized without intermediate product purchases  Capital investment can be significant to overcome bottlenecks Capacity Utilized as Crude Oil Slate Changes 1) Data based on notional refinery designed to run 100% heavy crude oil in coking configuration and substituting WTI crude oil 80% 82% 84% 86% 88% 90% 92% 94% 96% 98% 100% 0% 5% 10% 15% 20% 25% 30% Ef fe ct iv e C ap ac it y Light Crude % of Crude Slate CRUDE TOWER EFFECTIVE CAPACITY 100% Heavy 20% Light Crude Unit 100% 87.7% Vacuum Unit 100% 79.8% Delayed Coker 100% 77.7% Reformer 100% 92.5% DHT 100% 85.3% FCCU 100% 81.5%


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