Scott J. Ulm - 24 Feb 2026 Form 4 Insider Report for Armour Residential REIT, Inc. (ARR)

Role: CEO, Director
Signature: /s/ Scott J. Ulm
Issuer symbol: ARR
Transactions as of: 24 Feb 2026
Net transactions value: -$24,187
Form type: 4
Filing time: 26 Feb 2026, 16:00:55 UTC
Previous filing: 25 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
ULM SCOTT	CEO, Director	3001 OCEAN DRIVE, SUITE #201, VERO BEACH	/s/ Scott J. Ulm	26 Feb 2026	0001469064

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ARR	Common Stock, par value $0.001 per share	Options Exercise	$0	+3,380	+4.6%	$0.000000	76,182	24 Feb 2026	Direct	F1
transaction	ARR	Common Stock, par value $0.001 per share	Tax liability	$24,187	-1,352	-1.8%	$17.89	74,830	24 Feb 2026	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ARR	Phantom Stock	Options Exercise	$0	-3,380	-8.4%	$0.000000	36,870	24 Feb 2026	Common Stock	3,380		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	On February 24, 2026, the reporting person elected to convert 2,028 of the 3,380 shares of vested phantom stock into 2,028 shares of ARMOUR common stock. The reporting person elected to convert the remaining 1,352 shares of vested phantom stock into cash solely to pay income taxes on the vested stock. The 3,380 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 and 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.
F2	Each unit of phantom stock is the economic equivalent of one share of ARMOUR common stock.

Content

On February 24, 2026, the reporting person elected to convert 2,028 of the 3,380 shares of vested phantom stock into 2,028 shares of ARMOUR common stock. The reporting person elected to convert the remaining 1,352 shares of vested phantom stock into cash solely to pay income taxes on the vested stock. The 3,380 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 and 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.

Each unit of phantom stock is the economic equivalent of one share of ARMOUR common stock.