# EDGAR Filing Document

**Accession Number:** 0000826675
**File Stem:** 0000826675-25-000156
**Filing Date:** 2025-10
**Character Count:** 36193
**Document Hash:** e23b5788371e7581037815d2ded74aca
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000826675-25-000156.hdr.sgml**: 20251028

**ACCESSION NUMBER**: 0000826675-25-000156

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 20

**CONFORMED PERIOD OF REPORT**: 20251028

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251028

**DATE AS OF CHANGE**: 20251028

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DYNEX CAPITAL INC
- **CENTRAL INDEX KEY:** 0000826675
- **STANDARD INDUSTRIAL CLASSIFICATION:** REAL ESTATE INVESTMENT TRUSTS [6798]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 521549373
- **STATE OF INCORPORATION:** VA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-09819
- **FILM NUMBER:** 251425726

**BUSINESS ADDRESS:**
- **STREET 1:** 140 EASTSHORE DRIVE
- **STREET 2:** STE 100
- **CITY:** GLEN ALLEN
- **STATE:** VA
- **ZIP:** 23059
- **BUSINESS PHONE:** 8042175800

**MAIL ADDRESS:**
- **STREET 1:** 140 EASTSHORE DRIVE
- **STREET 2:** STE 100
- **CITY:** GLEN ALLEN
- **STATE:** VA
- **ZIP:** 23059

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** RESOURCE MORTGAGE CAPITAL INC/VA
- **DATE OF NAME CHANGE:** 19930722

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** RESOURCE MORTGAGE INVESTMENT CORP
- **DATE OF NAME CHANGE:** 19930505

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** RAC MORTGAGE INVESTMENT CORP /VA/
- **DATE OF NAME CHANGE:** 19930505

?xml version='1.0' encoding='ASCII'? dx-20251028

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**___________**

**FORM 8-K** 

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

Date of Report (Date of earliest event reported): October 28, 2025

**___________**

**DYNEX CAPITAL, INC.** 

(Exact name of registrant as specified in its charter)

---

| | | | |
|:---|:---|:---|:---|
| **Virginia** | **001-09819** | **001-09819** | **52-1549373** |
| (State or other jurisdiction of incorporation) | (Commission File Number) | (Commission File Number) | (IRS Employer Identification No.) |
| **140 East Shore Drive, Suite 100** |  |  |  |
| **Glen Allen, Virginia** |  |  | **23059-5755** |
| (Address of principal executive offices) |  |  | (Zip Code) |
|  | **(804)** | **217-5800** |  |
| (Registrant's telephone number, including area code) | (Registrant's telephone number, including area code) | (Registrant's telephone number, including area code) | (Registrant's telephone number, including area code) |

---

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

---

| | | |
|:---|:---|:---|
| Securities registered pursuant to Section 12(b) of the Act: | Securities registered pursuant to Section 12(b) of the Act: |  |
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| **Common Stock, par value $0.01 per share** | **DX** | **New York Stock Exchange** |
| **6.900% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share** | **DXPRC** | **New York Stock Exchange** |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. □

------

**Item 8.01 Other Events**

**Taxation of Our Company** 

As previously disclosed, on July 28, 2025, Dynex Capital, Inc. (the "Company") filed an automatic shelf registration statement on Form S-3 (File No. 333-289004) (the "Universal Shelf Registration Statement") with the U.S. Securities and Exchange Commission (the "SEC").

The information included under the heading "Taxation of Our Company" in Exhibit 99.1 hereto is incorporated by reference herein and supersedes and replaces the information contained in the first two paragraphs under the heading "Material U.S. Federal Income Tax Considerations—Taxation of our Company" in (i) the prospectus dated July 28, 2025 (the "Base Prospectus"), which is a part of the Universal Shelf Registration Statement, and (ii) the Base Prospectus, as supplemented by the prospectus supplement dated July 29, 2025 (the "Prospectus Supplement") filed by the Company with the SEC on July 29, 2025 pursuant to Rule 424(b) under the Securities Act of 1933, as amended.

**Legal Matters** 

The information included under the heading "Legal Matters" in Exhibit 99.2 hereto is incorporated by reference herein and supersedes and replaces the information under the heading "Legal Matters" in (i) the Base Prospectus and (ii) the Base Prospectus, as supplemented by the Prospectus Supplement. The information included under the heading "Legal Matters" in Exhibit 99.3 hereto is incorporated by reference herein and supersedes and replaces the information under the heading "Legal Matters" in the Prospectus Supplement.

Exhibits 5.1 and 8.1 hereto supersede and replace Exhibits 5.1 and 8.1 to the Universal Shelf Registration Statement, respectively, and Exhibit 5.1 hereto supersedes and replaces Exhibit 5.1 to the Current Report on Form 8-K of the Company filed with the SEC on July 29, 2025.

**Item 9.01 Financial Statements and Exhibits.**

**(d) Exhibits**

---

| | |
|:---|:---|
| **Exhibit No.** | **Description of Exhibit** |
| 5.1 | <u>[O](exhibit51legalopinion-octo.htm)[pinion of Morrison Foerster LLP](exhibit51legalopinion-octo.htm)</u> |
| 8.1 | <u>[O](exhibit81taxopinion-octobe.htm)[pinion of Morrison Foerster LLP](exhibit81taxopinion-octobe.htm)</u> |
| 23.1 | Consent of Morrison Foerster LLP (included in <u>[Exhibits 5.1](exhibit51legalopinion-octo.htm)</u> and <u>[8.1](exhibit81taxopinion-octobe.htm)</u>) |
| 99.1 | <u>[T](exhibit991taxationofourcom.htm)[axation of Our Company](exhibit991taxationofourcom.htm)</u> |
| 99.2 | <u>[L](exhibit992legalmatters.htm)[egal Matters](exhibit992legalmatters.htm)</u> |
| 99.3 | <u>[L](exhibit993legalmatters.htm)[egal Mat](exhibit993legalmatters.htm)[ters](exhibit993legalmatters.htm)</u> |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

---

------

**SIGNATURE**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | | |
|:---|:---|:---|:---|
| | | **DYNEX CAPITAL, INC.** | **DYNEX CAPITAL, INC.** |
| Date: | October 28, 2025 | By: | /s/ Michael A. Angelo |
|  |  |  | Michael A. Angelo |
|  |  |  | Chief Legal Officer and Corporate Secretary |

---

## Exhibit 5.1

**Exhibit 5.1**

---

| | | |
|:---|:---|:---|
| ![image_1a.jpg](image_1a.jpg) | 2100 L STREET NW <br>SUITE 900<br>WASHINGTON, D.C. 20037<br>TELEPHONE: 202.887.1500<br>FACSIMILE: 202.887.0763<br>WWW.MOFO.COM | MORRISON & FOERSTER LLP<br>AMSTERDAM, AUSTIN, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, MIAMI, NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C |

---

October 28, 2025

Board of Directors

Dynex Capital, Inc.

140 East Shore Drive, Suite 100

Glen Allen, Virginia 23059

Re: <u>Automatic Shelf Registration Statement on Form S-3</u>

Ladies and Gentlemen:

We have acted as counsel to Dynex Capital, Inc., a Virginia corporation (the "**Company**"), in connection with its Registration Statement on Form S-3 (File No. 333-289004) (the "**Registration Statement**") and the related prospectus included therein (the "**Base Prospectus**"), which became automatically effective upon filing with the United States Securities and Exchange Commission (the "**Commission**") under the Securities Act of 1933, as amended (the "**Securities Act**"), on July 28, 2025, relating to the registration under the Securities Act of an indeterminate amount of the following securities of the Company, which may be offered and sold from time to time, together or separately and in one or more series (if applicable), on a delayed or continuous basis pursuant to Rule 415 under the Securities Act: (i) shares of the Company's common stock, par value $0.01 per share (the "**Common Stock**"); (ii) shares of the Company's preferred stock, par value $0.01 per share (the "**Preferred Stock**"); (iii) debt securities of the Company (the "**Debt Securities**"); (iv) warrants to purchase the Common Stock, Preferred Stock or Debt Securities (the "**Warrants**"); and (v) units consisting of two or more securities of the Company described in clauses (i) through (iv) above, or any combination thereof (the "**Units"** and, together with the Common Stock, Preferred Stock, Debt Securities and Warrants, the "**Securities**").

The Debt Securities may be issued from time to time pursuant to an indenture (an "**Indenture**") to be entered into between the Company and an institution to be identified therein, as trustee, in the forms filed as Exhibits 4.5 or 4.6 to the Registration Statement, as may be amended or supplemented from time to time.

The Warrants may be issued from time to time pursuant to one or more warrant agreements (each, a "**Warrant Agreement**") to be entered into by the Company and one or more institutions, as warrant agents (each, a "**Warrant Agent**"), each to be identified in the applicable Warrant Agreement. The Warrant Agreement will conform to the description thereof set forth in the applicable prospectus or prospectus supplements.

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![image_1a.jpg](image_1a.jpg)<br>Dynex Capital, Inc.<br>October 28, 2025<br>Page 2<br>

The Units may be issued from time to time pursuant to one or more unit agreements (each, a "**Unit Agreement**") to be entered into by the Company and one or more institutions, as unit agents (each, a "**Unit Agent**"), each to be identified in the applicable Unit Agreement. The Unit Agreement will conform to the description thereof set forth in the applicable prospectus or prospectus supplements.

We have also acted as counsel to the Company in connection with the offering and sale from time to time on or after the date hereof of up to 75,000,000 shares of Common Stock (the "**Placement Shares**") pursuant to the Registration Statement, the Base Prospectus and the prospectus supplement dated July 29, 2025 filed with the Commission pursuant to Rule 424(b) under the Securities Act (together with the Base Prospectus, the "**ATM Prospectus**") and the terms of that certain Distribution Agreement, dated as of June 29, 2018, as amended on May 31, 2019, August 3, 2021, June 3, 2022, February 10, 2023, October 29, 2024, May 1, 2025, and July 29, 2025, by and among the Company, BTIG, LLC, Citizens JMP Securities, LLC, Janney Montgomery Scott LLC, JonesTrading Institutional Services LLC, J.P. Morgan Securities LLC, Keefe, Bruyette & Woods, Inc., RBC Capital Markets, LLC, UBS Securities LLC and Wells Fargo Securities, LLC (the "**Distribution Agreement**") and in the manner described in the ATM Prospectus. The Placement Shares will be issued from time to time in public offerings at market or negotiated prices under Rule 415 of the Securities Act.

As counsel for the Company, we have examined originals or copies, certified or otherwise identified to our satisfaction, of: (i) the Registration Statement, including the Base Prospectus and the ATM Prospectus; (ii) the Company's Amended and Restated Articles of Incorporation, as amended through the date hereof (the "**Charter**"); (iii) the Company's Amended and Restated Bylaws, as amended through the date hereof (the "**Bylaws**"); (iv) certain resolutions of the Company's Board of Directors or a duly constituted and acting committee thereof (the Board of Directors or committee thereof being hereinafter collectively referred to as the "**Board**") relating to the issuance, sale and registration of the Securities; and (v) the Distribution Agreement. In addition, we have examined originals or copies, certified or otherwise identified to our satisfaction, of such documents, corporate records, certificates of public officials and other instruments as we have deemed relevant and necessary for the purposes of rendering the opinions set forth herein.

In our examination, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals and the conformity with the originals of all documents submitted to us as copies. In making our examination of documents executed by parties other than the Company, we have assumed that each other party has the power and authority to execute and deliver, and to perform and observe the provisions of, such documents and has duly authorized, executed and delivered such documents, and that such documents constitute the legal, valid and binding obligations of each such party. We also have assumed the integrity and completeness of the minute books of the Company presented to us for examination. With respect

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![image_1a.jpg](image_1a.jpg)<br>Dynex Capital, Inc.<br>October 28, 2025<br>Page 3<br>

to certain factual matters, we have relied upon certificates or comparable documents of public officials and of officers or representatives of the Company.

We have assumed that any Indentures, any Warrant Agreements, any Unit Agreements and the issuance and sale of the Securities by the Company will not violate or constitute a default or breach under (i) any agreement or instrument to which the Company or its properties is subject; (ii) any law, rule or regulation to which the Company is subject; (iii) any judicial or regulatory order or decree of any governmental authority; or (iv) any consent, approval, license, authorization or validation of, or filing, recording or registration with any governmental authority.

We have further assumed that (i) the Registration Statement and any amendments thereto have become effective under the Securities Act and comply with all applicable laws at the time the Securities are offered or issued as contemplated by the Registration Statement; (ii) an appropriate prospectus supplement or term sheet relating to the Securities offered thereby will be prepared and filed with the Commission in compliance with the Securities Act and will comply with all applicable laws at the time the Securities are offered or issued as contemplated by the Registration Statement; (iii) all Securities will be issued and sold in compliance with the applicable provisions of the Securities Act, the Trust Indenture Act of 1939, as applicable, and the securities or blue sky laws of various states and in the manner stated in the Registration Statement and the applicable prospectus supplement; (iv) any deposit, purchase, underwriting or similar agreement relating to Securities being offered will be duly authorized, executed and delivered by the Company and the other parties thereto; (v) the number of shares of Common Stock or Preferred Stock, as the case may be, offered pursuant to the Registration Statement does not exceed, at the time of issuance, the authorized but unissued shares of Common Stock or Preferred Stock, as the case may be; and (vi) the Securities will not be issued in violation of the ownership limit contained in the Charter. This opinion letter is given, and all statements herein are made, in the context of the foregoing.

Our opinions are subject to the following qualifications and exceptions:

&nbsp;&nbsp;&nbsp;&nbsp;(i)The effect of bankruptcy, insolvency, reorganization, arrangement, moratorium or other similar laws relating to or affecting the rights of creditors generally, including, without limitation, laws relating to fraudulent transfers or conveyances, preferences and equitable subordination.

&nbsp;&nbsp;&nbsp;&nbsp;(ii)Rights to indemnification and contribution, which may be limited by applicable law or equitable principles.

&nbsp;&nbsp;&nbsp;&nbsp;(iii)Limitations imposed by general principles of equity upon the availability of equitable remedies or the enforcement of provisions of any Securities and the effect of judicial decisions which have held that certain provisions are unenforceable where their

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![image_1a.jpg](image_1a.jpg)<br>Dynex Capital, Inc.<br>October 28, 2025<br>Page 4<br>

enforcement would violate the implied covenant of good faith and fair dealing, or would be commercially unreasonable, or where a default under such Securities is not material.

&nbsp;&nbsp;&nbsp;&nbsp;(iv)We express no opinion as to the applicability of any regulatory statute, or rule or regulation of any regulatory agency, to the Company, or the effect of any such statute, rule or regulation on the opinions expressed herein.

&nbsp;&nbsp;&nbsp;&nbsp;(v)We express no opinion as to compliance with applicable antifraud statutes, and rules or regulations of applicable foreign, state and federal laws concerning the issuance or sale of the Securities.

&nbsp;&nbsp;&nbsp;&nbsp;(vi)Our opinion is based upon current statutes, rules, regulations, cases and official interpretive opinions, and it covers certain items that are not directly or definitively addressed by such authorities.

Based upon, subject to and limited by the foregoing, we are of the opinion that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.With respect to shares of the Common Stock, when (A) the Board has taken all necessary corporate action in conformity with the Charter and Bylaws to approve the issuance of the Common Stock, the terms of the offering thereof and related matters, and (B) due issuance and delivery of the Common Stock against payment of the consideration therefor in accordance with the applicable definitive purchase, underwriting or similar agreement approved by the Board, such shares of Common Stock will be validly issued, fully paid and nonassessable.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.With respect to shares of the Preferred Stock, when (A) the Board has taken all necessary corporate action in conformity with the Charter and Bylaws to approve the issuance and terms of a particular series of shares of Preferred Stock, the terms of the offering thereof and related matters, including the designation of the relative rights, preferences and limitations for such series of Preferred Stock in accordance with applicable law relating to such series of Preferred Stock and the proper filing with the State Corporation Commission of the Commonwealth of Virginia of Articles of Amendment and any and all required filings relating to such series of Preferred Stock, and (B) due issuance and delivery of the Preferred Stock against payment of the consideration therefor in accordance with the applicable definitive purchase, underwriting or similar agreement approved by the Board, such shares of the Preferred Stock will be validly issued, fully paid and nonassessable.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.With respect to the Debt Securities, when (A) the applicable Indenture relating to such Debt Securities has been duly authorized, executed and delivered by the Company, (B) the Board has taken all necessary corporate action to approve the issuance and terms of a particular series of such Debt Securities, the terms of the offering thereof and related matters, and (C) such Debt Securities have been duly executed, authenticated, issued and

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![image_1a.jpg](image_1a.jpg)<br>Dynex Capital, Inc.<br>October 28, 2025<br>Page 5<br>

delivered in accordance with the provisions of the applicable Indenture and the applicable definitive purchase, underwriting or similar agreement approved by the Board against payment of the consideration therefor as provided therein, such Debt Securities will be valid and legally binding obligations of the Company, enforceable against the Company in accordance with their terms and entitled to the benefits of the applicable Indenture.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.With respect to the Warrants, when (A) the Board has taken all necessary corporate action in conformity with the Charter and Bylaws to approve the form, terms, execution and delivery of a Warrant Agreement (including a form of certificate evidencing the Warrants), the issuance of the Warrants, the terms of the offering thereof and related matters, and (B) the certificates evidencing the Warrants with such terms are duly executed, attested, issued and delivered by duly authorized officers of the Company in accordance with the provisions of the applicable Warrant Agreement and the applicable definitive purchase, underwriting or similar agreement approved by the Board against payment of the consideration therefor as provided therein, such Warrants will be valid and legally binding obligations of the Company, enforceable against the Company in accordance with their terms.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.With respect to the Units, when (A) the Board has taken all necessary corporate action in conformity with the Charter and Bylaws to approve the form, terms, execution and delivery of a Unit Agreement (including a form of certificate evidencing the Units), the issuance of the Units, the terms of the offering thereof and related matters, and (B) the certificates evidencing Units with such terms are duly executed, attested, issued and delivered by duly authorized officers of the Company in accordance with the provisions of the applicable Unit Agreement and the applicable definitive purchase, underwriting or similar agreement approved by the Board against payment of the consideration therefor as provided therein, such Units will be valid and legally binding obligations of the Company, enforceable against the Company in accordance with their terms.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.The Placement Shares have been duly and validly authorized and upon issuance, delivery and payment therefor in the manner contemplated by the Registration Statement, the ATM Prospectus and the Distribution Agreement, will be validly issued, fully paid and nonassessable.

This opinion letter is based as to matters of law solely on the applicable provisions of the internal laws of the State of New York and the Virginia Stock Corporation Act, as currently in effect. We express no opinion herein as to any other laws, statutes, ordinances, rules or regulations.

This opinion is furnished to you in connection with the filing by the Company of a Current Report on Form 8-K relating to the offer and sale of the Placement Shares, which Form 8-K will be incorporated by reference into the Registration Statement, the Base Prospectus and the ATM Prospectus and may not be relied upon for any other purpose without our express written

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![image_1a.jpg](image_1a.jpg)<br>Dynex Capital, Inc.<br>October 28, 2025<br>Page 6<br>

consent. No opinion may be implied or inferred beyond the opinion expressly stated. This opinion is given as of the date hereof, and we assume no obligation to advise you of any changes in applicable law or any facts or circumstances that come to our attention after the date hereof that may affect the opinion contained herein.

We hereby consent to the filing of this opinion as an exhibit to the above-described Current Report on Form 8-K and to the reference to our firm contained under the heading "Legal Matters" in the Base Prospectus and the ATM Prospectus. In giving this consent, we do not admit that we are in the category of persons whose consent is required by Section 7 of the Securities Act or the rules and regulations promulgated by the Commission.

---

| |
|:---|
| Very truly yours, |
| <u>/s/ Morrison & Foerster LLP</u><br>Morrison & Foerster LLP |

---

## Exhibit 8.1

**Exhibit 8.1**

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| | | |
|:---|:---|:---|
| ![image_1.jpg](image_1.jpg) | 250 WEST 55TH STREET<br>NEW YORK<br>NEW YORK 10019-9601<br>TELEPHONE: 212.468.8000<br>FACSIMILE: 212.468.7900<br>WWW.MOFO.COM | MORRISON & FOERSTER LLP<br>AMSTERDAM, AUSTIN, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, MIAMI, NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C |

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October 28, 2025

Dynex Capital, Inc.

140 East Shore Drive, Ste. 100

Glen Allen, Virginia 23059

**Re:&nbsp;&nbsp;&nbsp;&nbsp;Dynex Capital, Inc. —** 

**Status as a Real Estate Investment Trust**

Ladies and Gentlemen:

We have acted as counsel to Dynex Capital, Inc., a Virginia corporation (the "***Company***"), in connection with a registration statement filed on Form S-3 (as amended, the "***Registration Statement***") by the Company with the U.S. Securities and Exchange Commission ("***SEC***") under the Securities Act of 1933 (the "***Securities Act***") on July 28, 2025, including a prospectus dated July 28, 2025, (the "***Base Prospectus***"), and a prospectus supplement to the Base Prospectus dated July 29, 2025 (the "***Prospectus Supplement***") (such Prospectus Supplement together with the Base Prospectus, the "***Prospectus***") relating to the offering from time to time of shares of the Company's common stock, par value $0.01 per share (the "***Shares***").

You have requested our opinion as to certain U.S. federal income tax matters regarding the Company. Although you may disclose to any and all persons, without limitation of any kind, this opinion, the U.S. federal tax treatment and federal tax structure of the Company and all materials of any kind that were provided to you by us relating to such tax treatment and tax structure, this opinion is intended solely for your benefit in connection with the offering of the Shares. You may not authorize any other person or entity to rely on this opinion, or otherwise make this opinion available for the benefit of any other person or entity, without our prior written consent.

In our capacity as counsel to the Company and for purposes of rendering this opinion, we have examined and relied upon the following, with your consent: (i) the Registration Statement, (ii) the Prospectus, (iii) a certificate executed by duly appointed officers of the Company (the "***Officer's Certificate***") setting forth certain factual representations, dated October 28, 2025, and (iv) such other documents as we have considered relevant to our

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![image_1.jpg](image_1.jpg)<br>

Dynex Capital, Inc.

October 28, 2025

analysis. In our examination of such documents, we have assumed the authenticity of original documents, the accuracy of copies, the genuineness of signatures, and the legal capacity of signatories. We have also assumed that all parties to such documents have acted, and will act, in accordance with the terms of such documents.

Our opinion is based on (a) our understanding of the facts as represented to us in the Officer's Certificate and (b) the assumption that (i) the Company and its subsidiaries have valid legal existences under the laws of the states in which they were formed and have operated in accordance with the laws of such states, (ii) the Company is operated, and will continue to be operated, in the manner described in the Officer's Certificate, (iii) the facts contained in the Officer's Certificate, the Registration Statement and the Prospectus are true and complete in all material respects, (iv) all representations of fact contained in the Officer's Certificate are true and complete in all material respects and (v) any representation of fact in the Officer's Certificate that is made "to the knowledge of" or similarly qualified is correct without such qualification. While we have made such inquiries and investigations as we have deemed necessary, we have not undertaken any independent inquiry into or verification of all such facts either in the course of our representation of the Company or for the purpose of rendering this opinion. While we have reviewed all representations made to us to determine their reasonableness, we have no assurance that they are or will ultimately prove to be accurate.

We note that the tax consequences addressed herein depend upon the actual occurrence of events in the future, which events may or may not be consistent with any representations made to us for purposes of this opinion. In particular, the qualification and taxation of the Company as a real estate investment trust ("***REIT***") for U.S. federal income tax purposes depends upon the Company's ability to meet on a continuing basis certain distribution levels, diversity of stock ownership, and the various qualification tests imposed by the U.S. Internal Revenue Code of 1986, as amended (the "***Code***"). To the extent that the facts differ from those represented to or assumed by us herein, our opinion should not be relied upon.

Our opinion herein is based on existing law as contained in the Code, final and temporary Treasury Regulations promulgated thereunder, administrative pronouncements of the Internal Revenue Service (the "***IRS***") and court decisions as of the date hereof. The provisions of the Code and the Treasury Regulations, IRS administrative pronouncements and case law upon which this opinion is based could be changed at any time, perhaps with retroactive effect. In addition, some of the issues under existing law that could significantly affect our opinion have not yet been authoritatively addressed by the IRS or the courts, and our opinion is not binding on the IRS or the courts. Hence, there can be no assurance that the IRS will not challenge, or that the courts will agree with, our conclusions.

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![image_1.jpg](image_1.jpg)<br>

Dynex Capital, Inc.

October 28, 2025

Based upon, and subject to, the foregoing and the next paragraphs below, we are of the opinion that, as of the date hereof:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.&nbsp;&nbsp;&nbsp;&nbsp;The Company has been organized and has operated in conformity with the requirements for qualification and taxation as a REIT pursuant to Sections 856 through 860 of the Code for its taxable year ended December 31, 2022 through its taxable year ended December 31, 2024, and its current organization and current and proposed method of operation will enable it to continue to qualify for taxation as a REIT for its current taxable year ending December 31, 2025.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.We have reviewed the statements included or incorporated by reference in the Prospectus under the heading "Material U.S. Federal Income Tax Considerations" and, although such discussion does not purport to summarize all possible U.S. federal income tax consequences of the purchase, ownership and disposition of the Shares, insofar as such discussion pertains to matters of law or legal conclusions, such discussion is correct in all material respects.

We undertake no obligation to update this opinion, or to ascertain after the date hereof whether circumstances occurring after such date may affect the conclusions set forth herein. We express no opinion as to matters governed by any laws other than the Code, the Treasury Regulations, published administrative announcements and rulings of the IRS, and court decisions.

This opinion is furnished to you solely for use in connection with the Registration Statement. We hereby consent to the filing of this opinion as an exhibit to a Current Report on Form 8-K of the Company and to such Registration Statement. We also consent to the reference to our firm name wherever appearing in the Registration Statement and the Prospectus. In giving this consent, we do not admit that we come within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the SEC thereunder, nor do we thereby admit that we are experts with respect to any part of the Registration Statement within the meaning of the term "experts" as used in the Securities Act or the rules and regulations of the SEC promulgated thereunder.

Sincerely,

<u>/s/ Morrison & Foerster LLP</u>

Morrison & Foerster LLP

## Exhibit 99.1

**Exhibit 99.1**

**Taxation of Our Company** 

We have elected to be taxed as a REIT under the U.S. federal income tax laws. We believe that, since such election, we have been and are organized and operated in such a manner as to qualify for taxation as a REIT under the Code, and we intend to continue to operate in such a manner, but no assurance can be given that we will operate in a manner so as to continue to qualify as a REIT. This section discusses the laws governing the U.S. federal income tax treatment of a REIT and its investors. These laws are highly technical and complex.

In the opinion of Morrison & Foerster LLP, we qualified to be taxed as a REIT for our taxable years ended December 31, 2022 through December 31, 2024, and our organization and current and proposed method of operation will enable us to continue to qualify as a REIT for our taxable year ending December 31, 2025 and in the future. We emphasize that the opinion of Morrison & Foerster LLP is based on various assumptions relating to our organization and operation, including that all factual representations and statements set forth in all relevant documents, records and instruments are true and correct, all actions described in this prospectus are completed in a timely fashion and that we will at all times operate in accordance with the method of operation described in our organizational documents and this prospectus. Investors should be aware that Morrison & Foerster LLP's opinion is based upon customary assumptions, is conditioned upon the accuracy of certain representations made by us as to factual matters, including representations regarding the nature of our assets and the future conduct of our business, and is not binding upon the IRS or any court. In addition, Morrison & Foerster LLP's opinion is based on existing U.S. federal income tax law governing qualification as a REIT, which is subject to change either prospectively or retroactively. Moreover, our continued qualification and taxation as a REIT depend upon our ability to meet on a continuing basis, through actual annual operating results, certain qualification tests set forth in the U.S. federal tax laws. Those qualification tests include the percentage of income that we earn from specified sources, the percentage of our assets that falls within specified categories, the diversity of our share ownership, and the percentage of our earnings that we distribute. While Morrison & Foerster LLP reviewed those matters in connection with rendering the foregoing opinion, Morrison & Foerster LLP will not review our compliance with those tests on a continuing basis. Accordingly, no assurance can be given that the actual results of our operation for any particular taxable year will satisfy such requirements. For a discussion of the tax consequences of our failure to qualify as a REIT, see "— Failure to Qualify."

## Exhibit 99.2

**Exhibit 99.2**

**LEGAL MATTERS**

The validity of the securities offered hereby and certain U.S. federal income tax matters are being passed upon for us by Morrison & Foerster LLP.

## Exhibit 99.3

**Exhibit 99.3**

**LEGAL MATTERS**

The validity of the securities offered pursuant to this prospectus supplement will be passed upon for us by Morrison & Foerster LLP. The Sales Agents are being represented in this offering by Cooley LLP, New York, New York.

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