American Heart Association 2025 Investor Presentation November 9, 2025 Forward-looking statement of Merck & Co., Inc., Rahway, N.J., USA This presentation of Merck & Co., Inc., Rahway, N.J., USA (the "company") includes "forward-looking statements" within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. These statements are based upon the current beliefs and expectations of the company's management and are subject to significant risks and uncertainties. ...

Financial Data and Key Metrics Changes - The company has nearly tripled the number of phase three assets since 2021, now having over 20 unique assets with blockbuster potential launching in the next three to five years [5][6] - The company has invested over $70 billion into business development over the last few years, enhancing its pipeline and portfolio [9] Business Line Data and Key Metrics Changes - The late-stage pipeline is strong, with two assets, WIN Revere and Cat Baxtive, already in the midst of launching and performing well [5][6] - The early-stage pipeline includes 50 different programs moving from phase one to phase two, indicating robust development activity [6] Market Data and Key Metrics Changes - The company is focusing on US manufacturing to mitigate tariff risks and has invested $12 billion in manufacturing capital in the US from 2018 to 2024 [14][15] - The company plans to invest an additional $9 billion in manufacturing and R&D facilities by 2028 [15] Company Strategy and Development Direction - The company aims to grow through the KEYTRUDA loss of exclusivity (LOE) by focusing on innovation and expanding its product portfolio [8][10] - The strategic framework includes investing in and augmenting the pipeline, with a focus on oncology and expanding into cardiometabolic and immunology sectors [9][91] Management's Comments on Operating Environment and Future Outlook - Management acknowledges significant macroeconomic challenges, including MFN (Most Favored Nation) pricing and tariffs, but remains focused on innovation as the path to long-term sustainability [10][12] - The company is actively engaging with the administration regarding drug pricing reforms and believes that addressing middlemen costs is crucial for lowering drug prices [29][32] Other Important Information - The company is committed to producing both drug product and drug substance in the US by 2026, which aligns with its strategy to enhance domestic manufacturing capabilities [21][23] - The company is exploring opportunities in combination therapies and bispecific antibodies to enhance its pipeline in immunology [88][90] Q&A Session Summary Question: How does the company rank the various sectoral pressures? - Management identified MFN as the most significant policy question, followed by tariffs and FDA changes, but noted that these have not yet had a direct impact on operations [12][16] Question: What steps has the company taken regarding KEYTRUDA and tariffs? - The company has shifted to US manufacturing for KEYTRUDA and brought in inventory to mitigate tariff impacts, viewing this as a no-regret move [20][21] Question: What is the company's strategy for the subcutaneous KEYTRUDA? - The company plans to price the subcutaneous version competitively to maximize adoption and access, ensuring it aligns with the IV pricing [53][54] Question: What is the outlook for WIN Revere? - The launch of WIN Revere is progressing well, with expectations for steady growth driven by physician confidence and safety profiles [57][58] Question: What is the potential for enicetide in the market? - The company believes enicetide can democratize access to LDL cholesterol lowering, with a significant unmet need in cardiovascular disease [71][76]