Sec Form 4 Filing - AMERICAN INTERNATIONAL GROUP, INC. @ ClearBridge Energy Midstream Opportunity Fund Inc. - 2024-06-09

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

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person AMERICAN INTERNATIONAL GROUP, INC. 2. Issuer Name and Ticker or Trading Symbol ClearBridge Energy Midstream Opportunity Fund Inc. [ EMO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) See Remarks (Last) (First) (Middle) 1271 AVENUE OF THE AMERICAS 3. Date of Earliest Transaction (MM/DD/YY) 06/09/2024 (Street) NEW YORK, NY10020 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 4.66% Series H Senior Secured Notes due October 15, 2025 06/09/2024 J( 1 ) 3,749,858.9 D $ 0 $ 1,744,439.63 I Held through subsidiaries ( 2 ) Series I Mandatory Redeemable Preferred Stock 06/09/2024 J( 1 ) 20 D $ 0 10 I Held through subsidiaries ( 3 ) Series J Mandatory Redeemable Preferred Stock 06/09/2024 J( 1 ) 47 D $ 0 23 I Held through subsidiaries ( 4 )

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. N ature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other AMERICAN INTERNATIONAL GROUP, INC. 1271 AVENUE OF THE AMERICAS NEW YORK, NY10020 See Remarks Signatures /s/ Gregory Ruffa, Authorized Signatory of American International Group, Inc. 06/11/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )As of June 9, 2024, Corebridge Financial, Inc. ("CRBG") ceased to be a controlled subsidiary of American International Group, Inc. ("AIG"). As a result of and following such event, AIG and CRBG report beneficial ownership independently and AIG no longer reports beneficial ownership of securities held directly by CRBG and its subsidiaries. ( 2 )American Home Assurance Company, an indirect wholly owned subsidiary of AIG, directly holds $1,744,439.63 principal amount of the reported securities. ( 3 )Lexington Insurance Company ("Lexington"), an indirect wholly owned subsidiary of AIG, directly holds 10 shares of the reported securities. ( 4 )Lexington directly holds 23 shares of the reported securities.

Remarks: Filed pursuant to Section 30(h) of the Investment Company Act of 1940.

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).

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