X0609 4 2026-08-21 0 0001428205 Armour Residential REIT, Inc. ARR 0001469064 ULM SCOTT false 3001 OCEAN DRIVE SUITE #201 VERO BEACH FL 32963 1 1 0 0 CEO 0 Common Stock, par value $0.001 per share 2026-08-21 4 M 0 10880 0 A 87738 D Common Stock, par value $0.001 per share 2026-08-21 4 F 0 4352 16.32 D 83386 D Phantom Stock 2026-08-21 4 M 0 10880 0 D Common Stock 10880 172610 D On August 21, 2026, the reporting person elected to convert 6,528 of the 10,880 shares of vested phantom stock into 6,528 shares of ARMOUR common stock. The reporting person elected to convert the remaining 4,352 shares of vested phantom stock into cash solely to pay income taxes on the vested stock. The 10,880 shares are part of, and relate to phantom stock vesting over a six-and-a-half year period, which was reported on a Form 4 report filed by the reporting person on January 14, 2021, phantom stock vesting over a seven-year period, which was reported on a Form 4 report filed by the reporting person on February 16, 2023, and phantom stock vesting over a five-year period, which was reported on a Form 4 report filed by the reporting person on June 18, 2026. Each unit of phantom stock is the economic equivalent of one share of ARMOUR common stock. /s/ Scott J. Ulm 2026-08-25