Blackstone Mortgage CFO sells 864 BXMT shares

BXMT’s chief financial officer sold a small block of shares under Rule 10b5-1 plans to cover tax obligations from vesting restricted stock.

Rhea-AI Filing Summary

BLACKSTONE MORTGAGE TRUST, INC. (BXMT) reported that Chief Financial Officer Marcin Urbaszek sold 864 shares of Class A common stock on September 17, 2026 at a weighted average price of $13.4227 per share. The transaction was effected under two Rule 10b5-1 trading plans adopted on March 6, 2025 and February 26, 2026 to satisfy tax withholding obligations related to vesting of previously granted restricted stock awards. Following this sale, Urbaszek directly holds 23,960 shares of BXMT common stock.

Insider Trade Summary 10b5-1

Net Seller: 864 shares

Net Sell 1 txn

Insider URBASZEK MARCIN

Role Chief Financial Officer

Sold 864 shs ($12K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2	864	$13.4227	$12K

Holdings After Transaction: Class A Common Stock — 23,960 shares (Direct)

Footnotes (2)

1. F1. The sales reported in this Form 4 were effected pursuant to two Rule 10b5-1 trading plans adopted on March 6, 2025 and February 26, 2026 to satisfy certain tax withholding related obligations in connection with the vesting of previously granted restricted stock awards.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.4207 to $13.425, inclusive. The Reporting Person undertakes to provide, upon request by the Securities and Exchange Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price for all transactions reported on this Form 4.

Key Figures

Shares sold: 864 shares Weighted average sale price: $13.4227 per share Post-transaction holdings: 23,960 shares +3 more

6 metrics

Shares sold 864 shares Class A common stock sold by the CFO on September 17, 2026

Weighted average sale price $13.4227 per share Average price for 864 shares sold on September 17, 2026

Post-transaction holdings 23,960 shares Class A common stock directly held by the CFO after the sale

Rule 10b5-1 plan adoption date March 6, 2025 First trading plan under which sales were effected

Rule 10b5-1 plan adoption date February 26, 2026 Second trading plan under which sales were effected

Sale price range $13.4207–$13.425 per share Range of prices for multiple sale transactions included in the Form 4

Key Terms

Rule 10b5-1 trading plans, weighted average price, restricted stock awards, tax withholding

4 terms

Rule 10b5-1 trading plans regulatory

"sales were effected pursuant to two Rule 10b5-1 trading plans adopted"

Rule 10b5-1 trading plans are written, pre-arranged instructions that allow company insiders (such as executives or directors) to automatically buy or sell their company's stock at specified times or under set conditions, like a standing instruction or automated thermostat for trades. They matter to investors because these plans provide a legal defense against insider‑trading accusations and create predictable insider trading patterns that can help signal whether sales are routine portfolio management or potentially meaningful to the company’s outlook.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

restricted stock awards financial

"obligations in connection with the vesting of previously granted restricted stock awards"

Restricted stock awards are company shares given to employees or executives that cannot be sold or transferred until certain conditions — like staying with the company for a set time or meeting performance targets — are met, like a gift that is locked in a safe until rules are satisfied. Investors care because these awards tie management’s pay to company performance, can increase the number of shares outstanding when they become tradable (dilution), and may signal expected future selling pressure or commitment to long-term growth.

tax withholding financial

"plans adopted ... to satisfy certain tax withholding related obligations"

Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did BXMT’s CFO report on this Form 4?

BXMT’s Chief Financial Officer, Marcin Urbaszek, reported selling 864 shares of Class A common stock on September 17, 2026 at a weighted average price of $13.4227 per share.

Why did the BXMT CFO sell 864 shares of stock?

The 864 shares were sold to satisfy tax withholding obligations related to the vesting of previously granted restricted stock awards, as described in the filing’s footnotes.

Were the BXMT CFO’s share sales made under a Rule 10b5-1 plan?

Yes. The filing states the sales were effected pursuant to two Rule 10b5-1 trading plans adopted on March 6, 2025 and February 26, 2026.

How many BXMT shares does the CFO hold after this transaction?

After the reported sale, Chief Financial Officer Marcin Urbaszek directly holds 23,960 shares of BLACKSTONE MORTGAGE TRUST, INC. Class A common stock.

What price range were the BXMT shares sold at in this Form 4?

The weighted average sale price reported is $13.4227 per share. The footnote explains the shares were sold in multiple transactions at prices ranging from $13.4207 to $13.425, inclusive.

How many total shares did the BXMT CFO sell in this Form 4 filing?

The filing reports that Chief Financial Officer Marcin Urbaszek sold 864 shares of BLACKSTONE MORTGAGE TRUST, INC. Class A common stock in this transaction.

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

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Available on EDGAR 09/18/2026 - 05:32 PM Accepted by SEC EDGAR 09/18/2026 - 05:31 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).

X

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^*

URBASZEK MARCIN

(Last) (First) (Middle)

C/O BLACKSTONE MORTGAGE TRUST

345 PARK AVENUE

(Street)

NEW YORK NEW YORK 10154

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
BLACKSTONE MORTGAGE TRUST, INC. [ BXMT ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/17/2026

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
Class A Common Stock	09/17/2026		S		864(1)	D	$13.4227(2)	23,960	D

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. The sales reported in this Form 4 were effected pursuant to two Rule 10b5-1 trading plans adopted on March 6, 2025 and February 26, 2026 to satisfy certain tax withholding related obligations in connection with the vesting of previously granted restricted stock awards.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.4207 to $13.425, inclusive. The Reporting Person undertakes to provide, upon request by the Securities and Exchange Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price for all transactions reported on this Form 4.

Remarks:

	/s/ Marcin Urbaszek	09/18/2026
	** 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)