Officer Joseph Castro files initial Form 3 for Nuveen BXMX (BXMX)

Rhea-AI Filing Summary

Nuveen S&P 500 BuyWrite Income Fund filed an initial insider ownership report for Joseph Castro, who serves as EVP, Chief Risk & Compliance. This Form 3 establishes his status as an officer of the fund for ongoing insider reporting purposes, but lists no share transactions.

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Accepted by SEC EDGAR 02/23/2026 - 03:03 PM Learn about SEC filing dates

FAQ

What does this Form 3 filing for BXMX report about Joseph Castro?

The Form 3 identifies Joseph Castro as an officer of Nuveen S&P 500 BuyWrite Income Fund. It records his role for insider reporting purposes and shows no reported buy, sell, acquire, or dispose transactions in the summarized data.

What is Joseph Castro’s role at Nuveen S&P 500 BuyWrite Income Fund (BXMX)?

Joseph Castro is reported as EVP, Chief Risk & Compliance for Nuveen S&P 500 BuyWrite Income Fund. This senior role involves oversight of risk and compliance functions, and makes him a reporting person under insider ownership rules.

Does the BXMX Form 3 show any insider share transactions by Joseph Castro?

The summarized data for this Form 3 shows no buy, sell, acquire, or dispose transactions and zero reported shares traded. It functions as an initial ownership and status filing rather than a record of trading activity.

Why is Nuveen S&P 500 BuyWrite Income Fund filing a Form 3 for BXMX?

The Form 3 records initial insider ownership information for an officer of the fund. By identifying Joseph Castro as EVP, Chief Risk & Compliance, it sets the baseline for any future required Form 4 or Form 5 insider transaction reports.

What does the transaction summary in the BXMX Form 3 indicate?

The transaction summary shows zero buys, zero sells, and neutral net activity. This means the filing is purely an initial insider status disclosure for Joseph Castro, without any associated share trades in the reported data.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Castro Joseph

(Last) (First) (Middle)

333 W. WACKER DRIVE

SUITE 2900

(Street)

CHICAGO IL 60606

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
10/16/2025

3. Issuer Name and Ticker or Trading Symbol
Nuveen S&P 500 BuyWrite Income Fund [ BXMX ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Chief Risk & Compliance

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

castropoa.txt

No securities are beneficially owned.

	Mark L. Winget/ Signed Under Power of Attorney	10/16/2025
	** 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 5 (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.