Blackstone Mortgage officer plans 864-share sale

Officer of BLACKSTONE MORTGAGE TRUST, INC. files a Rule 144 notice to potentially sell 864 shares of Class A common stock from vested equity awards.

Available on EDGAR 09/17/2026 - 04:04 PM EDT Accepted by SEC EDGAR 09/17/2026 - 04:03 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

BLACKSTONE MORTGAGE TRUST, INC. (BXMT) is the issuer of Class A common stock that an officer, Marcin Urbaszek, has notified under Rule 144 may be sold. The notice covers a proposed sale of 864 shares of Class A common stock, with the shares held at Merrill Lynch and expected to trade on the NYSE.

The shares to be sold are tied to a restricted stock unit award that vested on September 16, 2026 and was granted under the issuer’s equity compensation plan. The filing also lists prior sales by the same person of 452 shares on March 17, 2026 and 1,352 shares on June 17, 2026.

Key Figures

Shares to be sold under Rule 144: 864 shares Estimated aggregate sale price for 864 shares: $11,597.18 BXMT Class A common shares outstanding: 168,543,591 shares +3 more

6 metrics

Shares to be sold under Rule 144 864 shares Class A common stock proposed for sale by officer Marcin Urbaszek

Estimated aggregate sale price for 864 shares $11,597.18 Securities information for proposed Rule 144 sale

BXMT Class A common shares outstanding 168,543,591 shares Referenced share count for Class A common stock

Prior sale on March 17, 2026 452 shares for $8,646.76 Class A common stock sold by Marcin Urbaszek during past 3 months

Prior sale on June 17, 2026 1,352 shares for $24,809.20 Class A common stock sold by Marcin Urbaszek during past 3 months

Vesting date of RSU award September 16, 2026 Restricted stock unit award underlying the shares to be sold

Key Terms

Rule 144, restricted stock unit award, equity compensation plan

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock unit award financial

"Vesting of restricted stock unit award"

A restricted stock unit award is a promise by a company to give an employee a specified number of company shares at a future date if certain conditions are met, such as staying with the company or hitting performance goals. For investors, these awards matter because they can increase the total number of shares outstanding when converted, diluting existing holders, and they align employees’ incentives with shareholders’ interests much like giving a rising bonus that becomes real only after conditions are satisfied.

equity compensation plan financial

"Granted as part of issuer equity compensation plan"

A plan by which a company gives employees, directors or contractors ownership or the right to buy ownership in the company through stock, options or similar awards — think of promising slices of the company pie as part of someone's pay. It matters to investors because these awards can change the number of shares outstanding, affect reported profits and influence management’s decisions; large or generous plans can dilute existing holders and alter incentives over time.

FAQ

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

What does the Form 144 filing disclose for BXMT?

It discloses that an officer, Marcin Urbaszek, has filed a Rule 144 notice covering a potential sale of 864 shares of BLACKSTONE MORTGAGE TRUST, INC. Class A common stock, related to vested restricted stock units under the company’s equity compensation plan.

How many BXMT shares are covered by the new Rule 144 notice?

The notice covers a proposed sale of 864 shares of BLACKSTONE MORTGAGE TRUST, INC. Class A common stock, with the shares held at Merrill Lynch and indicated for trading on the NYSE.

What is the origin of the BXMT shares to be sold under this Form 144?

The shares to be sold come from a restricted stock unit award that vested on September 16, 2026 and was granted as part of the issuer’s equity compensation plan.

What past BXMT stock sales by Marcin Urbaszek are reported?

The filing lists past 3‑month sales of 452 shares of Class A common stock on March 17, 2026 for $8,646.76, and 1,352 shares on June 17, 2026 for $24,809.20.

How many BXMT Class A common shares are outstanding as referenced in this filing?

The securities information section references 168,543,591 shares of BLACKSTONE MORTGAGE TRUST, INC. Class A common stock outstanding as of the date cited in the filing; this is a baseline figure, not the amount being sold.

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

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001707300
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	BLACKSTONE MORTGAGE TRUST, INC.
SEC File Number	001-14788
Address of Issuer	345 PARK AVENUE 24TH FLOOR NEW YORK NEW YORK 10154
Phone	2126550220
Name of Person for Whose Account the Securities are To Be Sold	URBASZEK MARCIN
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A common stock	Merrill Lynch 225 Liberty Street Floor 37 New York NY 10281	864	11597.18	168543591	09/17/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A common stock	09/16/2026	Vesting of restricted stock unit award	BLACKSTONE MORTGAGE TRUST, INC.			864	09/16/2026	Granted as part of issuer equity compensation plan

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Marcin Urbaszek 345 PARK AVENUE 24TH FLOOR New York NY 10154	Class A common stock	03/17/2026	452	8646.76
Marcin Urbaszek 345 PARK AVENUE 24TH FLOOR New York NY 10154	Class A common stock	06/17/2026	1352	24809.20

144: Remarks and Signature

Remarks
Date of Notice	09/17/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/27/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Marcin Urbaszek
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)