The International Congress of Mathematicians (ICM) is where mathematicians come to present groundbreaking research and to receive the highest honors in the field, including the Fields Medals. Held every four years, this flagship event will return to an in-person format in July 2026, when it will be based in Philadelphia. This is the first time in four decades that the United States has hosted the ICM. Over 6,000 participants are expected. With philanthropic funding from Sloan and other foundations, the American Mathematical Society will ensure broad global representation by providing travel support to 658 mathematicians who, because they come from under-resourced communities and countries, would not be able to attend otherwise. Outreach plans include mathematical exhibits and events designed for the public generally and for young people in particular. By lowering barriers to participation, this grant will enable broader engagement with mathematics and with mathematicians from around the world.