Timothy Go , , , Chief Executive Officer and President

Timothy Go has served as Chief Executive Officer since May 2023 and as President since November 2021. He previously served as Chief Operating Officer from June 2020 to May 2023 and as Executive Vice President from June 2020 to November 2021. Prior to joining the Company, he served as Chief Executive Officer of the general partner of Calumet Specialty Products Partners, L.P. from January 2016 to April 2020 and retired from Calumet in June 2020. Prior to joining Calumet, Mr. Go served in various leadership roles at Koch Industries, Inc. and Flint Hills Resources, LP, a wholly-owned subsidiary of Koch Industries, Inc. from August 2008 to September 2015, having most recently served as Vice President, Operations of Flint Hills Resources, LP, from July 2012 through September 20I5. Mr. Go served as Managing Director, Operations Excellence from August 2008 to June 2011 of Koch Industries, Inc. Prior to joining Koch Industries, Mr. Go held various roles of increasing responsibility in downstream operations during his 18 years at ExxonMobil Corporation.

Atanas H. Atanasov , , , Executive Vice President and Chief Financial Officer

Mr. Atanasov has served as Executive Vice President and Chief Financial Officer since September 2022. Prior to joining the Company, Mr. Atanasov served as Chief Financial Officer of Lummus Technology LLC, a global chemical technologies company for the petrochemical and energy industries, from April 2022 to September 2022, as the Executive Vice President, Chief Financial Officer and Treasurer of Kraton Corporation, a NYSE listed specialty chemical company, from May 2019 until its merger with DL Holdings in March 2022 and as the Chief Financial Officer of Empire Petroleum Partners, LLC, a wholesale distributor of motor fuels, from February 2016 to May 2019. Prior to then, Mr. Atanasov served as Executive Vice President, Chief Financial Officer and Treasurer of NGL Energy Partners LP, a NYSE listed MLP, from May 2013 to February 2016, as Senior Vice President, Finance and Treasurer from September 2012 to May 2013 and as Vice President and Treasurer from November 2011 to September 2012. Prior to joining NGL, he held various finance roles of increasing responsibility with GE Capital from January 2003 to November 2011. He is a registered Certified Public Accountant.

Vaishali S. Bhatia , , , Executive Vice President, General Counsel and Secretary

Vaishali S. Bhatia has served as Executive Vice President since March 2023, as General Counsel since November 2019 and as Secretary since August 2019. Prior to then, she served as Senior Vice President from November 2019 to March 2023, Chief Compliance Officer from August 2019 to January 2020, Acting General Counsel from August 2019 to November 2019, Assistant General Counsel from May 2017 to August 2019, Assistant Secretary from May 2012 to August 2019 and Counsel from October 2011 to May 2017. Prior to joining the Company, Ms. Bhatia was an associate at Jones Day.

Valerie Pompa , , , Executive Vice President, Operations

Valerie Pompa has served as Executive Vice President, Operations since March 2023. Ms. Pompa previously served as Senior Vice President, Refining Operations of HF Sinclair Refining & Marketing LLC, a subsidiary of the Company, from October 2020 to April 2023. Prior to joining HollyFrontier Refining & Marketing LLC, Ms. Pompa provided customized leadership and business consulting services to clients in many industries, including energy, as the owner and Chief Executive Officer of VAP Business Solutions Limited from April 2018 to October 2020. She also served as Chief Operating Officer of ATS Industrial, from April 2018 to October 2020. Prior to then, Ms. Pompa held several leadership roles in the areas of process engineering, production planning and optimization, reliability, production management and innovation during her 17 years with Flint Hills Resources, LP, including having served as Vice President and Manufacturing Manager of the Corpus Christi Refinery from October 2012 to March 2017 and Vice President, Innovation and Technology from February 2017 to March 2018.

Steve C. Ledbetter , , , Executive Vice President, Commercial

Steven C. Ledbetter has served as Executive Vice President, Commercial since March 2023. Prior to the joining the Company, Mr. Ledbetter served as Director, President and Chief Executive Officer of Shell Midstream Partners GP LLC, the general partner of Shell Midstream Partners, L.P., from March 2021 to March 2023, where he was responsible for the vision, strategy and execution of the Shell Midstream business. Prior to then, he served as Vice President, Commercial of Shell Midstream from April 2018 to March 2021, where he was responsible for business development, joint ventures, oil movements and portfolio activity. Mr. Ledbetter also served as the President and Chief Executive Officer of Jiffy Lube International from October 2013 to February 2018, a wholly owned subsidiary of Shell, where he was responsible for the vision, strategy, growth and profitability of the Jiffy Lube brand and network. He first joined Shell in 1999 and held various roles of increasing responsibility in the areas of finance, commercial deal structuring, operations management, strategy and business transformation during his 24 years at Shell.

Matt Joyce , , , Senior Vice President, Lubricants and Specialties

Mr. Joyce joined the lubricants and specialties segment of the Company in March 2023. Prior to joining, Mr. Joyce served in various leadership positions at The Lubrizol Corporation from 1995 to March 2023. During this time, Mr. Joyce held expatriate roles based in London and Tokyo, and most recently served as Vice President, Corporate Ventures from July 2020 to March 2023 and Vice President, Global Sales and Marketing, from June 2016 to June 2020.

Dale Kunneman , , , Senior Vice President and Chief Human Resources Officer

Mr. Kunneman has served as Senior Vice President and Chief Human Resources Officer of the Company since November 2021. He previously served as Vice President and Chief Human Resources Officer from April 2018 until November 2021. Prior to joining the Company, he was Executive Vice President of HR and Chief People & Culture Officer at Accudyne Industries. He also served in executive leadership roles in HR at Baker Hughes.

Franklin Myers , , , Chairperson of the Board

Director Since: 2011

Business Experience:

Mr. Myers has served as the Chairperson of the Board since February 2019. Mr. Myers has served as a senior advisor of Quantum Energy Partners, a private equity firm, since February 2013. Mr. Myers served as an operating advisor to Paine & Partners, LLC, a private equity firm, from 2009 through 2012 and as Senior Advisor to Cameron International Corporation, a publicly traded provider of flow equipment products, from 2008 until 2009. He served Cameron in various other capacities, including as Senior Vice President and Chief Financial Officer from 2003 through 2008, President of Cameron’s compression business from 1998 through 2001 and Senior Vice President and General Counsel from 1995 through 1999. In addition, Mr. Myers served as Senior Vice President and General Counsel of Baker Hughes Incorporated from 1988 through 1995 and as an associate and then a partner at Fulbright & Jaworski (now Norton Rose Fulbright) from 1978 through 1988.

Additional Directorships:

Mr. Myers served as a director of Frontier Oil Corporation from 2009 until the merger of Frontier Oil Corporation and Holly Corporation in July 2011, as a director of Forum Energy Technologies, Inc. from September 2010 until March 2018, as a director of ION Geophysical Corporation from 2001 to June 2019, and as a director of NCS Multistage Holdings, Inc. from February 2017 to June 2020. He currently serves as a director of Comfort Systems USA, Inc. Mr. Myers also serves as a director of WireCo WorldGroup Inc., which ceased to have a class of securities registered pursuant to Section 12 of the Exchange Act at the end of September 2016.

Anne-Marie N. Ainsworth , ,

Director Since:

2017

Business Experience:

Ms. Ainsworth served as President and Chief Executive Officer of the general partner of Oiltanking Partners, L.P. and of Oiltanking Holding Americas, Inc., companies engaged in the terminaling, storage and transportation by pipeline of crude oil, refined petroleum products and liquefied petroleum gas, from 2012 until her retirement in 2014, Senior Vice President, Manufacturing of Sunoco Inc. from 2009 to 2012, and General Manager of the Motiva Enterprises, LLC Norco, Louisiana Refinery from 2006 to 2009. Prior to joining Motiva, Ms. Ainsworth served in various capacities at Royal Dutch Shell. Ms. Ainsworth is a graduate of the Institute of Corporate Directors Education Program (Rotman School of Management, University of Toronto and Haskayne School of Business, University of Calgary) and holds the ICD.D designation.

Additional Directorships:

Ms. Ainsworth has served on the boards of directors of Pembina Pipeline Corporation since 2014, Archrock, Inc. since 2015 and Kirby Corporation since 2015. She served on the board of directors of Seventy Seven Energy Inc. until 2015.

Anna C. Catalano , ,

Director Since:

2017

Business Experience:

Ms. Catalano served in various capacities for BP plc, and its predecessor Amoco Corporation, from 1979 until her retirement in 2003, including as Group Vice President, Marketing, for BP plc from 2000 to 2003.

Additional Directorships:

Ms. Catalano currently serves on the boards of directors of Ecovyst Inc. and Frontdoor, Inc. She served on the boards of directors of Mead Johnson Nutrition Company until May 2017, Chemtura Corporation until June 2017, Kraton Corporation until March 2022 and Willis Towers Watson plc until June 2022 (having previously served on the board of directors of Willis Group from 2006 until the merger of Willis Group and Towers Watson & Co.).

Leldon Echols , ,

Director Since:

2009

Business Experience:

Mr. Echols served as Executive Vice President and Chief Financial Officer of Centex Corporation from 2000 until 2006. Before joining Centex, Mr. Echols held various positions, including managing partner, at Arthur Andersen LLP from 1978 until 2000.

Additional Directorships:

Mr. Echols is currently a member of the boards of directors of Trinity Industries, Inc. and EnLink Midstream Manager, LLC, the managing member of EnLink Midstream, LLC. Prior to the closing of the business combination among Devon Energy Corporation, Crosstex Energy, Inc. and Crosstex Energy, L.P. in 2014, Mr. Echols served on the board of directors of Crosstex Energy, L.P. and Crosstex Energy, Inc. Prior to the closing of the January 2019 simplification transaction between EnLink Midstream Partners, LP (formerly known as Crosstex Energy, L.P.), Mr. Echols served on the board of EnLink Midstream GP, LLC, the general partner of EnLink Midstream Partners, LP.

Manuel J. Fernandez , ,

Director Since:

2020

Business Experience:

Mr. Fernandez joined KPMG LLP in 1984 and served in a number of leadership positions until his retirement in September 2020, including most recently as Managing Partner of the Dallas office and market leader for KPMG’s Southwest region across audit, tax and consulting services from October 2009 to September 2020. During his career at KPMG, he also served as National Managing Partner for Talent Acquisition, member of the National Inclusion and Diversity Board and as Co-Chair of the National Hispanic/Latino employee resource group.

Additional Directorships:

Mr. Fernandez serves on the board of directors of Jacobs Engineering Group Inc. since October 2020.

Timothy Go , , , Chief Executive Officer and President

Director Since: 2023

Business Experience:

Timothy Go has served as Chief Executive Officer since May 2023 and as President since November 2021. He previously served as Chief Operating Officer from June 2020 to May 2023 and as Executive Vice President from June 2020 to November 2021. Prior to joining the Company, he served as Chief Executive Officer of the general partner of Calumet Specialty Products Partners, L.P. from January 2016 to April 2020 and retired from Calumet in June 2020. Prior to joining Calumet, Mr. Go served in various leadership roles at Koch Industries, Inc. and Flint Hills Resources, LP, a wholly-owned subsidiary of Koch Industries, Inc. from August 2008 to September 2015, having most recently served as Vice President, Operations of Flint Hills Resources, LP, from July 2012 through September 20I5. Mr. Go served as Managing Director, Operations Excellence from August 2008 to June 2011 of Koch Industries, Inc. Prior to joining Koch Industries, Mr. Go held various roles of increasing responsibility in downstream operations during his 18 years at ExxonMobil Corporation.

Rhoman J. Hardy , ,

Director Since: 2022

Business Experience:

Mr. Hardy joined Shell USA, Inc. (formerly Shell Oil Company, Inc.) in 1988, and at the time of his retirement in 2022, Mr. Hardy served as Senior Vice President, Shell Chemicals and Products, for the U.S. Gulf Coast, a position he held since 2021. Prior to that time, Mr. Hardy served in a number of leadership positions, including as Vice President, Shell Chemicals and Products/General Manager, Shell Geismar Chemical Site from 2018 until 2021 and as General Manager, Shell Geismar Chemical Site from 2015 to 2018.

Additional Directorships:

Mr. Hardy currently serves as a director of Comfort Systems USA, Inc.

Craig Knocke , ,

Director Since:

2019

Business Experience:

Mr. Knocke is a co-founder and a Director of Turtle Creek Trust Company, a private trust and investment management firm, since 2009. He currently serves as the Chief Investment Officer and has served as a Portfolio Manager at Turtle Creek Management, LLC, a registered investment advisory firm based in Dallas, Texas, since 2007. Since 2009, Mr. Knocke has served as a Principal and a non-controlling manager and member of TCTC Holdings, LLC (“TCTC”), a bank holding company that is a banking, securities, and investment management firm. He previously held positions as a Vice President and Portfolio Manager at Brown Brothers Harriman & Co., as well as positions at Salomon Brothers and Texas Instruments.

Robert J. Kostelnik , ,

Director Since:

2011

Business Experience:

Mr. Kostelnik has served as a principal of Glenrock Recovery Partners since January 2012. Glenrock Recovery Partners assists energy, pipeline, and terminal companies with maximizing the value of non-fungible liquid hydrocarbons, and provides health, safety and environmental compliance and project management consulting services. Mr. Kostelnik served as the President and Chief Executive Officer of Cinatra Clean Technologies, Inc. from 2008 thru 2011. Cinatra provides tank cleaning systems to refining pipelines and terminals. Prior to his retirement in 2007, Mr. Kostelnik served in a number of senior positions during his 16 years with CITGO Petroleum Corporation, including as Vice President of Refining. During that time, Mr. Kostelnik was responsible for, among other things, the creation & implementation of the Health, Safety & Environmental Management System as well as environmental compliance & improvement. CITGO is engaged in the refining and marketing of petro-chemical products.

Additional Directorships:

Mr. Kostelnik served as a director of Frontier from 2010 until the merger in July 2011. He currently serves as a director of Methanex Corporation.

James H. Lee , ,

Director Since:

2011

Business Experience:

Mr. Lee has served as the Managing General Partner of Lee, Hite & Wisda Ltd., a private company with investments in oil and gas working, royalty and mineral interests, since founding the firm in 1984.

Additional Directorships:

Mr. Lee served as a member of the Board of Directors of Holly Logistic Services, L.L.C., the general partner of the general partner of Holly Energy Partners, L.P., until the merger in December 2023 of Holly Energy Partners, L.P. with a wholly-owned subsidiary of the Company.

Ross B. Matthews , ,

Director Since: 2022

Business Experience:

Mr. Matthews currently serves as Chief Operating Officer of REH Company and served as the Chairman and Chief Executive Officer of Sinclair Oil, which was comprised of the refining, marketing and renewables business HF Sinclair acquired from REH Company, from October 2009 until March 2022. Mr. Matthews joined Sinclair Oil in June 2000, initially serving as Vice President of Exploration and Production.

Additional Directorships:

Mr. Matthews served as a director of Sinclair Oil from January 2006 until March 2022.

Norman J. Szydlowski , ,

Director Since: 2022

Business Experience:

Mr. Szydlowski served as President and Chief Executive Officer and Director of SemGroup Corporation from November 2009 until his retirement in June 2014. He also previously served as Chief Executive Officer for Rose Rock Midstream and Colonial Pipeline Company. From 2004 to 2005, Mr. Szydlowski served as the Senior Consultant to the Iraqi Ministry of Oil in Baghdad on behalf of the U.S. Department of Defense (OSD, CPA) and Department of State (Embassy Baghdad). He was a Commissioner on the National Commission on Energy Policy and chaired the Task Force on Biofuels Infrastructure. Mr. Szydlowski co-chaired the Task Force on Ensuring Stable Natural Gas Prices for the Bipartisan Policy Center and was a member of the Working Group, Bipartisan Policy Center Response to The National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling Request. From 2002 until 2004, he was Vice President of Refining for Chevron Corporation and he first joined Chevron in 1981.

Additional Directorships:

Mr. Szydlowski currently serves as a director of Equitrans Midstream Corporation (“Equitrans”) and he served as a director of Sinclair Oil, which was comprised of the refining, marketing and renewables business HF Sinclair acquired from REH Company, from April 2017 until March 2022. Mr. Szydlowski served as a director of EQT Corporation (“EQT”) from November 2017 until the separation of EQT and Equitrans in November 2018. He served as a director of the general partner of 8point3 Energy Partners, LP from June 2015 until its acquisition by Capital Dynamics, Inc. in June 2018. Mr. Szydlowski also served as a director of the general partner of JP Energy Partners LP from July 2014 through March 2017.