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.

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. Ms. Bhatia has also served as Executive Vice President of Holly Logistic Services, L.L.C. (“HLS”), the general partner of the general partner of Holly Energy Partners, L.P., since April 2023, General Counsel of HLS since November 2019 and Secretary of HLS since August 2019. She served as Senior Vice President of HLS from November 2019 to April 2023, Chief Compliance Officer of HLS from August 2019 to January 2020, Acting General Counsel of HLS from August 2019 to November 2019, Assistant General Counsel of HLS from May 2017 to August 2019, Assistant Secretary of HLS from January 2013 to August 2019 and Counsel of HLS from October 2011 to May 2017.Prior to joining the Company, Ms. Bhatia was an associate at Jones Day.

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.

Mr. Kunneman has served as Senior Vice President and Chief Human Resources Officer of the Company and Holly Logistic Services, L.L.C., the general partner of the general partner of Holly Energy Partners, L.P., 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.

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.

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.).

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.

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.

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.

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.