Company: MFAN
Filing Date: 2025-08-14
Form Type: S-3ASR
Source: 0001104659-25-078748
Chunk: 0

Company: MFA FINANCIAL, INC.
Filing Date: 2025-08-14
Form: S-3ASR
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TABLE OF CONTENTS

As filed with the Securities and Exchange Commission on August 14, 2025 Registration No. 333- UNITED STATES
SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM S-3 REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933 MFA FINANCIAL, INC. (Exact name of registrant as specified in its charter)

| ​ | Maryland                                                       
 (State or other jurisdiction ofincorporation or organization)​ | ​ | ​ | One Vanderbilt Ave., 48th FloorNew York, New York 10017(212) 207-6400                                                 
 (Address, including zip code, and telephone number,including area code, of registrant’s principal executive offices)​ | ​ | ​ | 13-3974868                          
 (I.R.S. EmployerIdentification No.) | ​ |

Craig L. Knutson
Chief Executive Officer
MFA Financial, Inc.
One Vanderbilt Ave., 48th Floor
New York, New York 10017
(212) 207-6400 (Name, address, including zip code, and telephone number, including area code, of agent for service) Copies to:

| ​ | Harold E. Schwartz, Esq.MFA Financial, Inc.One Vanderbilt Ave., 48th FloorNew York, New York 10017(212) 207-6400 | ​ | ​ | Robert K. Smith, Esq.Kate Saltz, Esq.Mayme Donohue, Esq.Hunton Andrews Kurth LLP2200 Pennsylvania Ave NWWashington, DC 20037(202) 955-1500 | ​ |

Approximate date of commencement of proposed sale to the public:
From time to time after the effective date of this registration statement. If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ☐ If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. ☐ If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☒ If this Form is a