Ms. Judy L. Altmaier has served as director of Allison Transmission Holdings, Inc. since February 2019. Ms. Altmaier served as the President of Exmark Manufacturing Company Incorporated, a subsidiary of The Toro Company, or Toro, a worldwide provider of innovative solutions for the outdoor environment, from 2013 until her retirement in January 2019. Prior to that, she was Vice President, Operations and Quality Management of Toro from 2009 until 2013. Before joining Toro, Ms. Altmaier spent more than 25 years with Eaton Corporation, or Eaton, a diversified power management company, holding positions of increasing responsibility including Vice President of Operations, Auto Group Americas during 2009 and Vice President, General Manager Global Engine Valve Division in Turin, Italy from 2007 until 2009. Ms. Altmaier joined Eaton in 1983 as an accountant. Ms. Altmaier also serves on the board of directors of Enerpac Tool Group Corp. Ms. Altmaier holds a bachelor’s degree in business from Kearney State College and a Master of Business Administration from the University of Nebraska-Kearney.

Mr. D. Scott Barbour has served as a director of Allison Transmission Holdings, Inc. since May 2022. Mr. Barbour serves as the Chief Executive Officer and President of Advanced Drainage Systems, Inc., or ADS, a manufacturer of water management solutions in the stormwater and on-site septic wastewater industries, a position he has held since September 2017. From 1989 until 2016, Mr. Barbour worked for Emerson Electric Co., or Emerson, a global technology and engineering company that provides solutions for customers in industrial, residential and commercial markets, most recently serving as President and Chief Executive Officer of its $4.5 billion Network Power business. During his tenure at Emerson, Mr. Barbour also held several leadership positions including Group Vice President of Emerson Climate Technologies, President, Emerson Climate Technologies Asia Pacific Division, and President, Emerson Climate Technologies Air Conditioning Division. Mr. Barbour received his Bachelor of Science in Mechanical Engineering from Southern Methodist University and his Master of Business Administration from the Owen Graduate School of Management, Vanderbilt University. Mr. Barbour also serves on the board of directors of ADS.

Mr. Philip J. Christman has served as a director of Allison Transmission Holdings, Inc. since August 2022. Mr. Christman served as President, Operations of Navistar, Inc., or Navistar, a leading manufacturer of commercial trucks, buses and engines, from May 2017 until his retirement in March 2022. In this role, he was responsible for all Navistar operations encompassing engineering, manufacturing, procurement and quality. He began his career with Navistar in 1986 and held various management positions of increasing responsibility in operations, engineering, procurement and strategy. Mr. Christman has a Bachelor of Science degree in Mechanical Engineering from Indiana Institute of Technology and a Master of Business Administration from Ball State University. Mr. Christman also serves on the board of directors of Broadwind, Inc.

Mr. David C. Everitt has served as a director of Allison Transmission Holdings, Inc. since August 2014. Currently retired, Mr. Everitt, served as Interim Chief Executive Officer of Enviri Corporation (formerly known as Harsco Corporation), a provider of industrial services and engineered products, from February 2014 to August 2014. Prior to that, Mr. Everitt served as President of the Agriculture and Turf Division of Deere & Company, or Deere, a global leader in the production of agricultural, construction and forestry equipment and solutions, from September 2006 until his retirement in September 2012. He began his career at Deere in 1975 as an engineer and, over the next nearly four decades, held positions of increasing responsibility, most recently responsible for the sales and marketing for all of North America and Asia, as well as global design and production of John Deere tractors and turf and utility, and global Ag Solutions Systems. Mr. Everitt holds a Bachelor of Science in industrial engineering from Kansas State University. Mr. Everitt also serves on the board of directors for Brunswick Corporation, Corteva, Inc. and Enviri Corporation and previously served on the board of directors of Nutrien Ltd. and Agrium Inc.

Mr. David S. Graziosi has served as a director of Allison Transmission Holdings, Inc. since May 2018. Mr. Graziosi, serves as Chair of the Board, a position he has held since 2021, and President and Chief Executive Officer of Allison, a position he has held since June 2018. Prior to that, Mr. Graziosi served as President, Chief Financial Officer and Assistant Secretary of Allison from January 2016 until June 2018, and Executive Vice President, Chief Financial Officer, Treasurer and Assistant Secretary since joining Allison in November 2007. Before joining Allison, between 2006 and 2007, Mr. Graziosi served as Executive Vice President and Chief Financial Officer of Covalence Specialty Materials Corporation, or Covalence. Prior to joining Covalence, Mr. Graziosi held various positions in the industry, including as Vice President of Finance Precursors and Epoxy Resins at Hexion Specialty Chemicals, Inc. from 2005 to 2006 and Executive Vice President and Chief Financial Officer at Resolution Performance Products LLC from 2004 to 2005. Prior to that, he served as Vice President and Chief Financial Officer of General Chemical Industrial Products Inc., as Finance Director of GenTek Inc., and as Internal Audit Director and Assistant Corporate Controller at Sun Chemical Group B.V. Mr. Graziosi is also a Certified Public Accountant and a Certified Information Systems Auditor (non-practicing). Mr. Graziosi holds a bachelor’s degree in business economics from the State University of New York and a Master of Business Administration from Rutgers University.

Ms. Carolann I. Haznedar has served as a director of Allison Transmission Holdings, Inc. since November 2018. Ms. Haznedar held various positions with E. I. du Pont de Nemours and Company, or DuPont, a global innovator of technology-based materials and solutions, from 1981 until her retirement in June 2016. During Ms. Haznedar’s most recent 18 years, she was responsible for several global businesses including Packaging and Industrial Polymers, Engineering Polymers serving the automotive industry, Kevlar® Life Protection and Specialty Fluorochemicals. Prior to these roles, she held several functional leadership roles over 10 years, with increasing responsibility. She started at DuPont in manufacturing for control systems engineering and spent seven years in manufacturing including large international plant sites. Prior to DuPont, Ms. Haznedar worked for Edo-Aire Corporation, an aviation company, where she worked on microprocessor control for nav/comm systems. Ms. Haznedar holds a bachelor’s degree in computer science/math from Montclair State University and has MBA studies from Ohio University. Ms. Haznedar also serves on the board of directors for Enviri Corporation.

Mr. Sasha Ostojic has served as a director of Allison Transmission Holdings, Inc. since August 2022. Mr. Ostojic serves as a Venture Partner at Playground Global LLC, a venture capital firm specializing in early stage deep tech companies, a role he has held since April 2019. Mr. Ostojic also serves as an Adviser to the CEO at Zoox, Inc., a developer of self-driving vehicles acquired by Amazon.com, Inc. in 2020, where he also served as Interim Senior Vice President of Software between November 2021 and October 2022. Prior to these roles, he served as Senior Vice President of Engineering at Cruise LLC, a self-driving car company owned by General Motors, from October 2016 until November 2017 and as Vice President of Software for NVIDIA Corporation, a pioneer in accelerated and AI computing, from March 2011 until October 2016. Mr. Ostojic has a Bachelor of Science degree in Computer Science from San Francisco State University and a Master of Business Administration from Santa Clara University.

General, United States Army (retired) Perna has served as a director of Allison Transmission Holdings, Inc. since August 2022. General Perna retired from the United States Army in July 2021 as the Chief Operating Officer of Operation Warp Speed, the Trump administration’s multi-billion-dollar coronavirus vaccine and treatment effort, a position he had held since May 2020. Prior to that, General Perna served as Commanding General of United States Army Materiel Command, which develops and delivers materiel readiness solutions for the Army’s land force capabilities, from September 2016 to May 2020 and as Deputy Chief of Staff, G-4 of the Army, with responsibility for oversight of the policies and procedures used by all Army logisticians globally, from 2014 to September 2016. During his 38 years of service in the United States Army, General Perna held many other staff and command assignments, including Commander, Joint Munitions Command and Joint Munitions and Lethality Lifecycle Management Command, Commander, Defense Supply Center Philadelphia, Commander, 64th Forward Support Battalion and Commander, 4th Sustainment Brigade. General Perna holds an Associate Degree in Business Administration from Valley Forge Military Academy and a Bachelor Degree in Business Management from the University of Maryland and was awarded a Master’s Degree in Logistics Management from the Florida Institute of Technology. General Perna also serves on the board of directors of Almonty Industries Inc.

Mr. Krishna Shivram has served as a director of Allison Transmission Holdings, Inc. since August 2022. Mr. Shivram serves as Managing Partner in Veritec Capital Partners, a firm that invests in early to mid-stage energy technology companies, a position he has held since January 2023. Mr. Shivram served as Chief Executive Officer of Sentinel Energy Services Inc., or Sentinel, a special purpose acquisition company, a position he held from November 2017 to December 2020. Mr. Shivram also served as interim Chief Executive Officer of Weatherford International plc from November 2016 to March 2017 and Executive Vice President and Chief Financial Officer of Weatherford International plc from November 2013 until November 2016. He has over 30 years of financial and operational management experience in the energy industry and previously worked for Schlumberger Ltd. in a variety of roles across the globe, including as Vice President and Treasurer from January 2011 until November 2013. Mr. Shivram has a Bachelor of Science degree in Economics and Commerce from Sydenham College in India and is a Chartered Accountant. Mr. Shivram has served as a member of the board of directors of Ranger Energy Services, Inc., an oilfield service company, since August 2017 and as a member of the board of directors of Stem, Inc. since March 2025. He also previously served on the board of directors of Sentinel, Superior Energy Services Inc. and GulfMark Offshore Inc.