Dynex Co-CEO has 15,667 shares withheld for tax

Dynex Capital’s Co-CEO had shares withheld to cover taxes on restricted stock unit vesting, with a large direct and family-related ownership position reported afterward.

Rhea-AI Filing Summary

DYNEX CAPITAL INC (DX) insider Byron L. Boston, Co-CEO and Chairman, reported a code F transaction on September 8, 2026, in which 15,667 shares of common stock were withheld at $12.89 per share to satisfy tax withholding obligations upon the vesting of restricted stock units. Following this tax-withholding disposition, he held 883,567 shares directly, which the disclosure states includes unvested restricted stock units, plus additional indirect holdings through family members. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Tax Withholding: 15,667 shares

Tax Withholding 4 txns

Insider BOSTON BYRON L

Role Co-CEO & Chairman of the Board

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1, F2	15,667	$12.89	$202K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 883,567 shares (Direct); Common Stock — 1,500 shares (Indirect, By son); Common Stock — 1,500 shares (Indirect, By 2nd son); Common Stock — 3,095 shares (Indirect, By spouse and son jointly)

Footnotes (2)

1. F1. Reflects shares withheld upon vesting of restricted stock units to satisfy tax withholding obligations.
2. F2. Includes unvested restricted stock units.

Key Figures

Shares withheld for taxes: 15,667 shares Withholding price per share: $12.89 per share Direct holdings after transaction: 883,567 shares +3 more

6 metrics

Shares withheld for taxes 15,667 shares Common stock withheld on September 8, 2026 to satisfy tax withholding on RSU vesting

Withholding price per share $12.89 per share Value used for the 15,667 Dynex Capital shares withheld for tax obligations

Direct holdings after transaction 883,567 shares Direct Dynex Capital common stock held by Byron L. Boston after the tax-withholding event, including unvested RSUs

Indirect holdings by son 1,500 shares Common stock reported as indirectly owned through one son

Indirect holdings by second son 1,500 shares Common stock reported as indirectly owned through a second son

Indirect holdings by spouse and son jointly 3,095 shares Common stock reported as indirectly owned by spouse and son jointly

Key Terms

restricted stock units, tax withholding obligations, indirect

3 terms

restricted stock units financial

"Reflects shares withheld upon vesting of restricted stock units to satisfy"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligations financial

"shares withheld upon vesting of restricted stock units to satisfy tax withholding obligations"

indirect financial

"reported as indirectly owned through son, second son, and spouse and son"

FAQ

What insider transaction did Dynex Capital (DX) report for Byron L. Boston?

Byron L. Boston reported a code F transaction on September 8, 2026, where 15,667 shares of Dynex Capital common stock were withheld to pay tax liabilities arising from the vesting of restricted stock units, rather than being sold in an open-market trade.

At what price were the Dynex Capital (DX) shares withheld in the Form 4 filing?

The shares were withheld at a price of $12.89 per share. This price applies to the 15,667 shares of Dynex Capital common stock used to satisfy Boston’s tax withholding obligations on vested restricted stock units.

How many Dynex Capital (DX) shares does Byron L. Boston hold directly after this transaction?

After the September 8, 2026 tax-withholding transaction, Byron L. Boston held 883,567 shares of Dynex Capital common stock directly. The filing states this includes unvested restricted stock units in that total.

What indirect Dynex Capital (DX) holdings related to Byron L. Boston are disclosed?

The filing lists indirect holdings of 1,500 shares held by a son, 1,500 shares held by a second son, and 3,095 shares held jointly by his spouse and son. These are reported as indirect ownership positions.

Was the Dynex Capital (DX) insider transaction made under a Rule 10b5-1 plan?

No. The filing indicates that the Rule 10b5-1 checkbox is not affirmed, so no Rule 10b5-1 trading plan is reported for the September 8, 2026 tax-withholding transaction.

Does the Form 4 for Dynex Capital (DX) indicate an open-market sale by Byron L. Boston?

No. The reported transaction is a code F event, described as payment of tax liability by delivering or withholding securities upon RSU vesting, not a sale into the open market.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/10/2026 - 05:22 PM Accepted by SEC EDGAR 09/10/2026 - 05:22 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BOSTON BYRON L

(Last) (First) (Middle)

C/O DYNEX CAPITAL, INC.

140 EASTSHORE DRIVE, SUITE 100

(Street)

GLEN ALLEN VIRGINIA 23059

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
DYNEX CAPITAL INC [ DX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Co-CEO & Chairman of the Board

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/08/2026		F		15,667(1)	D	$12.89	883,567(2)	D
Common Stock								1,500	I	By son
Common Stock								1,500	I	By 2nd son
Common Stock								3,095	I	By spouse and son jointly

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Reflects shares withheld upon vesting of restricted stock units to satisfy tax withholding obligations.

2. Includes unvested restricted stock units.

Remarks:

	/s/ Kathy E. Rhodes, as attorney-in-fact for Byron L. Boston	09/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)