Form 4 Filing for Thompson Donald

This filing details transactions made by Thompson Donald, a director at NORTHERN TRUST CORP (NTRS). On April 21, 2026, Mr. Donald acquired 34.89 shares of common stock at a price of $171.74 per share, bringing his post-transaction total to 30,347.74 shares. Additionally, 989 shares were acquired at no cost, resulting in a new total of 31,336.74 shares. Mr. Donald also holds 1,743 shares of common stock indirectly through a trust. The filing was signed on April 23, 2026, by David A. Serna as attorney-in-fact.