X0609 4 2026-05-21 0 0001428205 Armour Residential REIT, Inc. ARR 0001248587 HOLLIHAN JOHN P III false 3001 OCEAN DRIVE SUITE #201 VERO BEACH FL 32963 1 0 0 0 0 Common Stock 2026-05-21 4 M 0 1900 0 A 21001 D Common Stock 2026-05-21 4 F 0 760 16.47 D 20241 D Phantom Stock 2026-05-21 4 M 0 1900 0 D Common Stock 1900 30254 D On May 21, 2026, the reporting person elected to convert 1,140 shares out of 1,900 shares of vested phantom stock into 1,140 shares of ARMOUR common stock. The person elected to convert the remaining 760 shares of vested phantom stock into cash solely to pay income taxes on the vested stock. The 1,900 shares are part of, and relate to, phantom stock vesting over a five-year period, which was reported on a Form 4 filed by the reporting person on February 14, 2023, December 18, 2025 and May 21, 2026. Includes 5,019 shares of common stock (25,095 shares prior to ARMOUR's one-for-five reverse stock split effective September 29, 2023) acquired in multiple transactions from February 2019 to April 2023 pursuant to the issuer's dividend reinvestment plan, which were not previously reported. Each unit of phantom stock is the economic equivalent of one share of ARMOUR common stock. /s/ John P. Hollihan 2026-05-26