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2025 SK Innovation E&S Film In the era of the climate crisis, the world is taking swift action to transition towards becoming an eco-friendly energy society. In tune with this action, SK Innovation ENS has rebuilt itself as a clean and safe energy solution provider. As the second largest conglomerate in Korea based on total assets, SK Group has secured future growth opportunities by focusing on AI, semiconductor, and energy. SK Innovation is the main company in the group's energy business. SK Innovation is the largest private energy company in the Asia-Pacific region with assets of approximately $70 billion. SK Innovation ENS is a company in company of SK Innovation responsible for lowcarbon LG, renewable energy, hydrogen energy and energy solution businesses. SK Innovation ENS began as a city gas holding company and has established a global LNG value chain, emerging as Korea's number one private LG service operator. [Music] However, our journey doesn't stop here. We are creating a safe and sustainable energy future by connecting various energy sources. [Music] [Music] Our integrated LG value chain will enable us to generate stable profits and accelerate our transition. [Music] [Music] We are at the forefront of a new lowcarbon LG business that uses CCS technology to capture and store carbon emitted from gas fields. The Barrosa gas field in Australia is preparing to apply CCS technology and the lowcarbon LG produced there in the future will contribute to reducing carbon emissions across the entire LG value chain with strong capabilities in the power business. SK Innovation ENS is expanding its presence in the renewable energy sector. We are building a large-scale pipeline focused on solar and wind power projects and going beyond Korea to pioneer new international markets, helping our partners achieve their RE 100 goals. [Music] SK Innovation ENS operates the world's largest hydrogen liquefaction plant, serving as a key stepping stone for advancing the domestic hydrogen ecosystem. From a long-term perspective, we are considering leveraging our expertise in the LG value chain and CCS technology to expand into the blue hydrogen business. This will allow us to create a virtuous cycle ultimately to reduce carbon emissions. [Music] The timely acquisition of Key Capture Energy was a strategic move to enter the US market, the leader in energy solutions with the aim of becoming a top tier global energy solution provider. [Applause] In addition, we are securing the knowhow needed to operate the power grid stably by acquiring Ensolve, a unique district electricity operator in Korea. We are also working to continuously grow our mobility-based energy solution business by leveraging I parking's unrivaled parking lot network in Korea. [Applause] The core businesses of SK Innovation ENS are closely interconnected, generating strong synergies. [Music] In the future, SK Innovation ENS will expand its global LNG value chain and integrated with power value chain business models based on diverse lowcarbon power sources such as renewable energy and hydrogen. Join us on this inspiring journey toward a green energy future with SK Innovation ENS.

2025 SK Innovation Brand Film Questions about energy. They change with the times. But there’s a company that always finds answers. At the dawn of industry: Refining business Oil crisis: Overseas oil exploration and production business Soaring electricity demand: LNG value chain integration Sustainable energy demand: Battery and new renewable energy business The questions the world asks Will only grow more diverse and complex. But as always, We will find the answers. So that ordinary lives May shine brighter than our name. When the world asks about energy, we answer with innovation. SK Innovation

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Global Social Contribution Global Social Contribution Achievements Social Contribution at Global Business Sites 37 Sitein 19 countries The achievements of the “EnviRun for the Earth” Number of participants 1,168 Participation hours 2,016 hours As of 2025 Global Social Contribution Overview Employees at SK Innovation’s overseas business sites plan and implement diverse social contribution activities to serve as a social safety net and foster coexistence with local communities. Highlights of Global Social CSR Activities SK On SK On USA (SKBA) – Great Music Festival (GMF) in USA GMF in USA, held at the Lawrenceville Arts Center in Atlanta, Georgia in 2023, supported artistic activities for people with developmental disabilities. The event provided a meaningful opportunity for local officials, organizations, stakeholders, and residents to connect through music. SK On Hungary – Great Music Festival (GMF) in Hungary From 2024 to this year, SK On’s European production subsidiary in Hungary has been supporting the artistic activities of individuals with developmental disabilities through the “GMF in Hungary” program. The event was attended by around 200 stakeholders, including the Hungarian Ministry of Interior, the Hungarian Association for Music for the Developmentally Disabled, and the Battery Association, who shared the festival's purpose. In addition, SK On is committed to fostering shared growth with the local community through various initiatives such as running educational programs to train talent in the battery industry, donating to public foundations, and conducting blood donation activities twice a year at hospitals in Komárom-Esztergom County. SK On China (SKBMC) – Environmental Campaign At Jintan Wuyue Square in Changzhou, employees led a campaign promoting knowledge of waste separation among citizens and children, helping raise awareness and support environmental conservation. SK IE Technology SKIET Poland (SKBMP) – Environmental Cleanup with Children with Developmental Disabilities Employees of the Poland subsidiary carried out plogging in Dąbrowa Górnicza with children from a local school for developmental disabilities, and also arranged tree planting and gardening to help enhance their social and interpersonal skills. SKIET Poland (SKBMP) – Nursing Home Visits To celebrate Poland’s Grandmother’s Day and Grandfather’s Day, employees visited a local nursing home, spending time with the elderly and offering companionship. They also donated items such as music therapy speakers, sharing warmth as extended family members. SKIET China (SKBMC) – Blood Donation & Giving Employees of the China subsidiary participated in blood donation together with partner company members, realizing the value of sharing life and fulfilling their role as part of the social safety net. SK Trading International SKTI Singapore (SKEI) – Social Safety Net Activities Employees in Singapore regularly donate blood to help address the national blood supply shortage. They also participate in the "Willing Hearts" program, preparing and delivering free lunch boxes for disadvantaged neighbors. In addition, they support the local charity "Food Bank" by packaging and delivering reusable food containers.

Major Business Flagship Project 1: Medical Support for Children with Leukemia and Childhood Cancer Since 2018, SK Innovation has consistently provided “medical expense support for children with leukemia and childhood cancer,” easing the financial and emotional burdens on both patients and their families. These children endure long treatment periods, side effects, interruptions in schooling, and emotional distress. By enabling timely treatment, SK Innovation helps them regain healthy smiles and plans to continue delivering hope and courage to future generations. Cumulative amount supported: 3.33 billion won Cumulative number of beneficiary children: 274 people Flagship Project 2: Prosthetic Limb Production & Repair Support SK Innovation has continued its "Prosthetic Limb Production & Repair Support Program for Amputees" for 14 years. Prosthetic limbs restore up to 80–90% of physical function and help amputees build a positive mindset, offering crucial support especially to those who lost limbs due to accidents or chronic illness complications. In mountainous regions, where funding for purchase or repair is limited, SK Innovation provides not only production but also mobile repair services, serving as a reliable partner for amputees. Cumulative amount supported: 9.74 billion won Cumulative number of beneficiary: 192 people (*Period : 2012–2024) Flagship Project 3: Housing Improvement for Descendants of National Patriots This initiative began when an employee raised awareness of the challenges faced by descendants of national patriots and the need for greater support. In 2025, it became an official social contribution project. Among various issues, SK Innovation focused on improving the poor housing conditions of independence patriots’ descendants, partnering with Habitat Korea to carry out renovation projects. Employees at local business sites also participate through volunteer work, adding value to the initiative. With this project, SK Innovation expresses gratitude for the dedication and sacrifice of national heroes and continues its support with respect. Cumulative homes improved: 4 households (*Period : 2015)

Operation of the 1% Happiness Sharing Fund About 1% Happiness Sharing Fund As part of their commitment to creating social value, employees of SK Innovation and its affiliates donate 1% of their base salary, which the company matches through a Matching Grant to create the "1% Happiness Sharing Fund." The fund supports shared growth with partners as well as a wide range of national and local community initiatives. By 2024, employee contributions totaled KRW 22.6 billion, and with the company's matching grant, the fund reached approximately KRW 43.7 billion. SK Innovation and its affiliates will continue to take the lead in addressing local community challenges through the 1% Happiness Sharing Fund. 1% Happiness Sharing Fund Sponsorship Projects Headquarters Medical support for children with leukemia and childhood cancer Support for the Production and Repair of Prosthetics Support Program for Children Preparing for Independence and Children Caring for Family Members Support for Opening Libraries in Local Children’s Centers Companionship program for seniors living alone Wish-fulfillment program for children with incurable diseases Mangrove forest restoration project Ulsan Support for Children with Incurable Diseases and Pediatric Cancer Emergency aid for low-income households with disabilities upport for children and youth who are victims of abuse Warm Contact program Support for future talents from low-income families Mangrove forest restoration project Safety Net Program Incheon Support for child centers and welfare facilities Home repair program for seniors living alone and low-income families Mangrove forest restoration project Miracle of 119 won project (support for fire and accident victims in Incheon) Medical support for low-income seniors 1% Happiness Sharing Size (Donations) Annual donation to the 1% Happiness Sharing Fund (Unit: KRW 100 million) Program Launch Year: 2017 Annual Fund Size: Employee donations + Company Matching Grant Category 2020 2021 2022 2023 2024 Donations 57.6 60.7 66.1 72 73.5 Cumulative amount 164.9 225.6 291.7 363.7 437.2 Articles on the 1% Happiness Sharing Fund

Support System Volunteer Week (V-Week) Every year, SK Innovation and its affiliates hold Volunteer Week in both the first and second halves, during which employees at all domestic and overseas business sites participate in volunteer activities. Executives take the lead by actively joining in, helping to promote the company’s unique culture of volunteerism. During this period, a variety of volunteer programs are offered simultaneously, giving employees the opportunity to choose activities that reflect their personal interests. Overseas business sites also carry out their own volunteer initiatives during V-Week, enabling all employees worldwide to contribute to creating social value. V-Badge Guide Badge upgrades are based on cumulative annual volunteer hours, with clear thresholds for each tier: Challenge to Become a SUPEX Hero! Collect a star by achieving the V-Hero Badge! Those who collect stars for five consecutive years receive special recognition. However, if an employee fails to maintain V-Hero status in consecutive years, all previously collected stars will be reset. Volunteer V-Badge To recognize the dedication and achievements of employees who actively practice volunteerism, SK Innovation introduced the V-Badge System in 2024. The system consists of six levels, from Rookie to the top-tier V-Hero (Volunteer Hero). Employees reaching the highest level are honored at the year-end Outstanding Volunteer Awards Ceremony, where executives personally deliver messages of appreciation. Through this system, SK Innovation formally acknowledges those leading in social value creation and fosters a culture of active volunteer participation.

Community Co-prosperity Ulsan Complex “Sharing a Meal, Warm Contact Program” At the Ulsan Complex, SK Innovation runs the Sharing a Meal, Warm Contact Program to help address food insecurity among vulnerable seniors in the local community. The program delivers rice and seasonal food items to seniors who struggle to access meals due to the suspension of services from institutional meal volunteer groups. Employees also volunteer with Ulsan Nam-gu Senior Club to deliver lunch boxes, providing dependable support for the elderly. Cumulative households supported : 1,585 (*Period : 2020–2025) SK Incheon Petrochem's “Memory Keeping Program” As we enter a super-aged society, the importance of dementia prevention, beyond diagnosis and treatment, is increasingly emphasized. In response, SK Incheon Petrochem operates the digital cognitive training program 'Memory Keeping program' to help prevent dementia among seniors in the Incheon region. ' Memory Keeping program' carries the dual meaning of protecting the cognitive health of seniors and helping them preserve precious memories, while also honoring and uplifting the seniors who have contributed to the development of the nation and local communities. This program, in collaboration with the Incheon Seo-gu Senior Welfare Center, provides various digital cognitive training activities aimed at preventing dementia and improving cognitive functions. A completion ceremony is also held for seniors who finish the training courses. Moving forward, we plan to continue various social contribution activities aimed at enhancing senior welfare, including preventing social isolation of seniors living alone and providing medical expense support. Cumulative participants : 127 Cumulative beneficiaries: : 1,898 (*Period : 2023–2025) SK Incheon Petrochem's “Hopeful Sports Class” SK Incheon Petrochem has been running the " Hopeful Sports Class" for children with developmental disabilities in the Incheon area since 2016. This program is designed to help children develop social adaptation skills by interacting with their peers and to promote physical development and confidence through various sports activities. The " Hopeful Sports Class " include activities such as basketball, balloon targeting, ball relay, and running, all aimed at enhancing physical development and social adaptation skills. As of 2025, children from special education classes at 13 elementary schools in the Seo-gu district of Incheon participate in the program. SK Incheon Petrochem volunteers join each activity to ensure the children can participate safely. Cumulative participants : 770 Cumulative beneficiaries : 4,795 (*Period : 2017–2025)

Social Enterprise / Social Venture Support Certification Support for Life Cycle Assessment (LCA) To strengthen the ESG-based business competitiveness of social enterprises and expand their investment opportunities, SK Innovation supports Life Cycle Assessment (LCA) verification for social enterprises. This process quantifies the environmental impact from production to sales of products developed by social enterprises fostered and supported by SK Innovation, while also identifying ways to reduce negative impacts and enhance product competitiveness. Cumulative enterprises supported : 4 (*Period : 2022–2025) Probono To share employee expertise with social enterprises and achieve growth together with stakeholders, SK Innovation carries out pro bono projects. These include project-based consulting, usability testing, and educational advisory programs. Advisory activities span 23 professional fields such as HR, labor, fire safety, and general safety. At the Ulsan Complex and Daejeon Institute of Environmental Science & Technology, employees also provide specialized industrial fire safety consulting for social enterprises. Participants : 3,988 Social enterprises supported: 138 (*Period : 2022–2025) Silent Taxi SK Energy, SK Innovation’s refining subsidiary, partnered with social enterprise "CO:ACTUS" to help hearing-impaired individuals gain taxi licenses and jobs with corporate taxi companies. In addition, by partnering with transportation platform business "Silent Mobility" and SK Energy LPG stations, the program provides subsidies to corporate taxi operators based on the number of hearing-impaired drivers hired. Indirect contribution to job creation for people with hearing impairments : 79 people (2024-2025) (*Period : 2022–2025)