BXSL (NYSE: BXSL) COO purchases 1,035 common shares in open market trade

Rhea-AI Filing Summary

Blackstone Secured Lending Fund’s Chief Operating Officer Katherine Rubenstein bought 1,035 Common Shares of Beneficial Interest in an open-market transaction at $24.08 per share. This purchase increased her direct ownership to 5,770.705 common shares. Some of her holdings include shares acquired through the issuer’s dividend reinvestment plan.

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

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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^*

Rubenstein Katherine

(Last) (First) (Middle)

C/O BLACKSTONE PRIVATE CREDIT

STRATEGIES LLC, 345 PARK AVE

(Street)

NEW YORK NY 10154

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Blackstone Secured Lending Fund [ BXSL ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026

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

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

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

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 Shares of Beneficial Interest	03/10/2026		P		1,035	A	$24.08	5,770.705(1)	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. Includes common shares acquired through the Issuer's dividend reinvestment plan.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ William Renahan, as Attorney-in-Fact	03/11/2026
	** 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.

FAQ

What insider transaction did BXSL’s COO report on this Form 4?

BXSL’s Chief Operating Officer Katherine Rubenstein reported an open-market purchase of 1,035 Common Shares of Beneficial Interest. The shares were bought at $24.08 each, reflecting a direct increase in her equity stake in Blackstone Secured Lending Fund.

How many BXSL shares did the COO own after this reported purchase?

After the reported transaction, Katherine Rubenstein directly owned 5,770.705 Common Shares of Beneficial Interest in BXSL. This figure represents her total direct holdings following the 1,035-share open-market purchase disclosed in the Form 4 filing.

Was the BXSL insider transaction a purchase or sale of shares?

The BXSL insider transaction was a purchase of shares. Katherine Rubenstein executed an open-market buy of 1,035 Common Shares of Beneficial Interest, as indicated by transaction code “P” and the transaction_direction field marked as “buy.”

What price did the BXSL COO pay per share in the open-market trade?

Katherine Rubenstein paid $24.08 per share for the 1,035 BXSL Common Shares of Beneficial Interest. This reported price reflects the cost basis of her new shares acquired in the open market on the transaction date provided.

Does the BXSL Form 4 mention dividend reinvestment plan shares?

Yes. A footnote explains that Rubenstein’s total reported holdings include common shares acquired through Blackstone Secured Lending Fund’s dividend reinvestment plan. This clarifies that part of her position has been accumulated automatically via reinvested distributions over time.

Is the BXSL COO’s ownership on this Form 4 direct or indirect?

The Form 4 shows Katherine Rubenstein’s BXSL holdings as direct ownership. The transaction is coded with ownership type “direct” and ownership code “D,” indicating the shares are held in her own name rather than through an intermediary entity.