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Mr. Hendricks has served as President and Chief Executive Officer of Patterson-UTI since October 2012 and as a director of Patterson-UTI since June 2017. From April 2012 through September 2012, he served as Chief Operating Officer of Patterson-UTI. Prior to Patterson-UTI, Mr. Hendricks worked in a number of positions at Schlumberger for 24 years, where he last served as a drilling division President, having lived and worked around the world in the energy industry, offshore and onshore, and conducting business at times in Spanish and French. As CEO at Patterson-UTI, he has focused on transformation through investments in people and technology, growth through strategic acquisitions, improving recruiting and leadership development and also enhancing the company's sustainability position. Mr. Hendricks attended Texas A&M University, receiving a Bachelor of Science degree in Petroleum Engineering, and then began his career working on an offshore drilling rig in the Gulf of Mexico for Ocean Drilling & Exploration Company (currently Diamond Offshore). Mr. Hendricks is a past Chairman of the International Association of Drilling Contractors, IADC Contractor of the Year in 2021, a member of the Society of Petroleum Engineers, an energy contributor on CNBC and has testified on energy matters with the U.S. Senate Committee on Energy and Natural Resources in Washington D.C.

Mr. Holcomb has served as Executive Vice President and Chief Operating Officer since August 2025. Mr. Holcomb joined Patterson-UTI in February 1998 with the acquisition of Robertson Onshore Drilling Company, and since that time has served in numerous operational management roles, including as Chief Business Officer from September 2023 to August 2025, Chief Operating Officer from January 2023 to September 2023, as President of Patterson-UTI Drilling Company LLC, a wholly owned subsidiary of Patterson-UTI, from January 2012 to December 2022, and as Senior Vice President of Operations of Patterson-UTI Drilling Company LLC from April 2006 to January 2012. Mr. Holcomb has over 35 years of experience in contract drilling operations. Mr. Holcomb holds a Bachelor of Science Degree in Business Management from LeTourneau University.

Mr. Smith has served as Executive Vice President and Chief Financial Officer of Patterson-UTI since September 2017. From April 2014 until September 2017, Mr. Smith served as Executive Vice President and Chief Financial Officer of Kirby Corporation, a marine transportation and diesel engine services company. From January 2014 to April 2014, Mr. Smith served as Executive Vice President - Finance of Kirby Corporation. Prior to joining Kirby Corporation, Mr. Smith served as Senior Vice President and Chief Financial Officer of Benthic Geotech and was previously Chief Financial Officer for both Global Industries, LTD and NATCO Group. Mr. Smith holds a degree in business administration from the University of Houston.

Mr. Berns has served as Executive Vice President and Chief Commercial Officer of Patterson-UTI since May 2017. Mr. Berns served as a director of Patterson-UTI from May 2001 to June 2017 and as Senior Vice President of Patterson-UTI from April 2003 to May 2017. Mr. Berns served as a director of UTI from 1995 to May 2001. Mr. Berns has been an executive with REMY Investors since 1994. Mr. Berns holds a Bachelor's Degree in Business Administration from San Diego State University and a Master's Degree in Taxation from Golden Gate University.

Mr. Drummond has served as Vice Chairman of the Board and a director of Patterson-UTI since September 2023. Mr. Drummond served as a member of the board of directors of NexTier Oilfield Solutions Inc. (NexTier), an oilfield service company that merged with the Company in September 2023, from August 2018 to September 2023. He joined NexTier in August 2018 as Chief Executive Officer and was elected as President in October 2019, which position he held until September 2023. Prior to joining NexTier, Mr. Drummond served as the President & Chief Executive Officer of Key Energy Services, Inc. and served for more than 30 years at Schlumberger Limited in various executive positions. Mr. Drummond has served as a director of Expro Group Holdings N.V. (Expro) since May 2017, and as Chairman of the Board of Expro since May 2024. He has previously served on the board of directors of the National Ocean Industries Association, the Houston Offshore Energy Center, the Greater Houston Partnership, the API Upstream Committee, and as an Advisory Board Member of the University of Houston Global Energy Management Institute. Mr. Drummond attained his B.S. in Mineral/Petroleum Engineering from the University of Alabama.

Mr. Huff has served as Chairman of the Board of Patterson-UTI since June 2020, as a director of Patterson-UTI since May 2001 and served as a director of UTI Energy Corp. (UTI) from 1997 to May 2001. Mr. Huff is owner and Chairman of Freebird Partners, a private investment firm created in 2002 that is focused on new technologies, energy, digital and sustainability. Mr. Huff serves as a director at various of Freebird's private portfolio companies, including Corva AI, an oilfield services software solutions company, FSubsea AS, a subsea pump provider, and Flocean AS, a subsea desalination technology company where he is Chairman. Previously, Mr. Huff served as the President and Chief Executive Officer of Grant Prideco, Inc., the world's largest provider of drill pipe and other drill stem products, Executive Vice President, Chief Financial Officer and General Counsel of Weatherford International, Inc., one of the world's largest international oilfield services companies, and co-founded Intervale Capital, an oilfield service private equity company. Mr. Huff began his professional career in 1983 with the law firm of Norton Rose Fulbright US LLP where he was a partner and specialized in corporate, securities and merger and acquisition matters. Mr. Huff holds a Bachelor of Arts degree and J.D. from the University of New Mexico, where he graduated as a member of the Order of the Coif and cum laude, and a Masters of Law from New York University School of Law. Mr. Huff serves on the Boards of the University of New Mexico Foundation, the Alley Theatre and the Hobby School of Public Affairs at the University of Houston and is actively involved with various charities, including the University of St. Thomas, Houston and the Houston Food Bank.

Ms. Cepak has served as a director of Patterson-UTI since August 2014. Ms. Cepak has served as a director of Baytex Energy Corp., an upstream oil and gas company, since June 2023, as a director of California Resources Corporation, an upstream oil and gas company, since October 2020 (and as chair since April 2021). Ms. Cepak served as a director of EnLink Midstream, LLC, a midstream company, from December 2021 until its acquisition by ONEOK, Inc. in January 2025 and as a director of Ranger Oil Corporation, an upstream oil and gas company, from September 2019 until its acquisition by Baytex in 2023. Ms. Cepak served as the Chief Financial Officer of Energy XXI Gulf Coast, Inc., an upstream oil and gas company, from August 2017 to October 2018. Ms. Cepak served as the Chief Financial Officer of KLR Energy (and, subsequent to its business combination, Rosehill Resources Inc., an upstream oil and gas company) from January 2015 to June 2017. Ms. Cepak served as a director of Yates Petroleum Corporation, a privately owned, independent oil and gas exploration and production company, from October 2015 to October 2016. Ms. Cepak served four years as the Chief Financial Officer of EPL Oil & Gas, Inc., and was further appointed Executive Vice President in January 2014, and she served in those roles until June 2014, when EPL was sold. Ms. Cepak began her career with EPL as a Senior Asset Management Engineer, a position she held until she was appointed Director of Corporate Reserves in September 2001. Ms. Cepak was named EPL's Director of Investor Relations in April 2006 and Vice President, Treasurer and Investor Relations in July 2008. In July 2009, Ms. Cepak was designated as EPL's Principal Financial Officer and, in September 2009, she was appointed Senior Vice President. Ms. Cepak has more than 25 years of energy industry experience and prior to joining EPL, she was a Senior Reservoir Engineer with Exxon Production Company and ExxonMobil Company with operational roles including reservoir engineering and subsurface completion engineering for numerous offshore Gulf of Mexico properties. Ms. Cepak holds a B.S. in Engineering from the University of Illinois and a Masters of Business Administration in Management with a concentration in Finance from Tulane University.

Ms. Nelson has served as a director of Patterson-UTI since September 2023. Ms. Nelson served as a member of NexTier's board of directors from October 2019 to September 2023. She is also the president of Greenridge Advisors, LLC, which she founded in 2007 as an energy services and equipment consulting firm focused on the development, execution, and financing of corporate and product line strategies. Ms. Nelson advises her clients on strategy development, capital allocation, acquisition evaluation and infrastructure development. Her clients span a broad range of oilfield service, product and geographic markets. She also joined the Helix Energy Solutions Group, Inc. board of directors and its audit committee in July of 2019, and in May of 2020 began serving as the chair of the audit committee. Ms. Nelson served as a member of APA Corporation's board of directors from February 2014 until May 2024. Ms. Nelson began her career at Amoco Production Company in a variety of engineering, project management and planning roles. From 2000 to 2007, Ms. Nelson served as a vice president of SCF Partners, an oilfield service and equipment-focused private equity firm, where she concentrated on investment strategy, investment execution and portfolio company management. During her tenure at SCF Partners and Greenridge Advisors, Ms. Nelson has served on the board of directors of several private companies. Ms. Nelson has devoted her career to serving companies in the oil and gas industry.

Mr. Stewart has served as a director of Patterson-UTI since September 2023. Mr. Stewart served as a member of Keane's and, subsequently, NexTier's board of directors from March 2011 to September 2023. He joined Keane (predecessor to NexTier) in March 2011 as Chairman and Chief Executive Officer and served as Executive Chairman from August 2018 to October 2019. Mr. Stewart has served as Chief Executive Officer of One X, a provider of flowback, production and sand management, and pressure control equipment rentals and associated services, since October 2023. Prior to joining Keane, from 2007 to 2009, he served as the President and Chief Executive Officer of a privately held international drilling company. From 2006 to 2007, Mr. Stewart served as Vice President of Integrated Drilling Services for Weatherford International plc, based in London and Dubai, where he created and managed a global business unit that included a 50-rig international land contract drilling group and a global project management team. Mr. Stewart began his career with Schlumberger Limited, where he held senior leadership positions across the globe over the span of 22 years.

Ms. Robertson has served as a director of Patterson-UTI since April 2022. Ms. Robertson has served as a director of EOG Resources, Inc., an upstream oil and gas company, since January 2019, and as a director of Seadrill Limited, an offshore drilling contractor, since November 2021. Ms. Robertson served as a director of Superior Energy Services, Inc., an oilfield services company, from February 2021 until March 2025. Ms. Robertson served in the role of Executive Chairman of Noble Corporation plc (Noble), an offshore drilling contractor, from May 2020 until her retirement from Noble in February 2021. Previously, Ms. Robertson served as Chairman of the Board, President and Chief Executive Officer of Noble from January 2018 until May 2020. Ms. Robertson previously served in various other management roles for Noble and its subsidiaries, including (i) Executive Vice President from 2006 to January 2018, (ii) Senior Vice President - Administration from 2001 to 2006 and (iii) Vice President - Administration from 1996 to 2001. Ms. Robertson also served continuously as Corporate Secretary of Noble from 1993 until assuming the Chairman's role in 2018. Ms. Robertson joined a predecessor subsidiary of Noble in 1979. Ms. Robertson holds a Bachelor of Journalism degree from the University of Texas at Austin and successfully completed the Harvard Business School Advanced Management Program in 1998.

Ms. Judah has served as a director of Patterson-UTI since April 2018. Ms. Judah has served as a director for privately held Aethon Energy III, LLC, an upstream oil and gas investment firm, since June 2019, and as a member of the University Lands Advisory Board since August 2020. Ms. Judah served as a director of the general partner of Crestwood Equity Partners LP, a midstream company, from November 2018 to November 2023, when Crestwood was acquired by Energy Transfer. Ms. Judah served as a director of Jagged Peak Energy Inc., an upstream oil and gas company, from April 2019 to January 2020, when Jagged Peak was acquired by Parsley Energy. Ms. Judah served as the President of the Society of Petroleum Engineers from September 2016 to October 2017 while on secondment from Chevron, and as a member of the Board of Directors of the Society of Petroleum Engineers from 2003 to 2006 and from 2012 to 2018. Ms. Judah held numerous leadership positions at Chevron, including general manager for Chevron's Southern Africa business unit from August 2010 to September 2016, president of Chevron Environmental Management Company from August 2007 to August 2010 and general manager of reservoir and production engineering for Chevron Energy Technology Company from June 2004 to August 2007. Before joining Chevron in 1998, she held various upstream petroleum engineering positions for Texaco and Arco, starting in Midland in 1981. Ms. Judah holds Bachelor of Science and Masters of Science degrees in petroleum engineering from Texas A&M University, a Masters of Business Administration from the University of Texas of the Permian Basin and a Juris Doctorate from the University of Houston Law Center. Ms. Judah is a registered professional Engineer in Texas, currently serves on both the Texas A&M and University of Houston College of Engineering Advisory Councils, and has been a member of the Texas A&M Petroleum Engineering Industry Board since 1996.

On April 3, 2025, the Board of Directors of Patterson-UTI Energy, Inc. approved the appointment of Forrest Robinso to the position of Chief Accounting Officer, effective immediately. Mr. Robinson served as the Company's corporate controller from January 2023 until April 2025 and previously served as the Company's assistant controller for financial reporting from October 2020 until January 2023. Prior to joining the Company, Mr. Robinson was employed at Callon Petroleum Company, where he served as assistant controller for financial reporting and technical accounting from January 2020 until September 2020 and as Financial Reporting Director from April 2019 to January 2020. Prior to those roles, Mr. Robinson was employed at Newfield Exploration Company in various roles from 2011 to 2019, and he was employed in the audit practice of BDO USA, LLP from 2007 to 2011. Mr. Robinson is a certified public accountant and holds a Master of Business Administration from the Mays Business School at Texas A&M University and a Bachelor of Business Administration with an emphasis in accounting from Sam Houston State University.