SC 13G/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 13G

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO § 240.13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO § 240.13d-2

(Amendment No. 1)

ACTIVISION BLIZZARD, INC.

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

00507V109

(CUSIP Number)

June 30, 2023

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☒ Rule 13d-1 (b)

☐ Rule 13d-1 (c)

☐ Rule 13d-1 (d)

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (the “Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes.)

CUSIP No. 00507V109 13G Page 2 of 12 Pages

1	NAME OF REPORTING PERSON   Warren E. Buffett
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP   (a)  ☒        (b)  ☐
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION   United States Citizen
NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER   NONE
		6	SHARED VOTING POWER   14,658,121 shares of Common Stock
		7	SOLE DISPOSITIVE POWER   NONE
		8	SHARED DISPOSITIVE POWER   14,658,121 shares of Common Stock
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON   14,658,121 shares of Common Stock
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐   Not Applicable.
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9   1.9%
12	TYPE OF REPORTING PERSON   IN

CUSIP No. 00507V109 13G Page 3 of 12 Pages

1	NAME OF REPORTING PERSON   Berkshire Hathaway Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP   (a)  ☒        (b)  ☐
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION   State of Delaware
NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER   NONE
		6	SHARED VOTING POWER   14,658,121 shares of Common Stock
		7	SOLE DISPOSITIVE POWER   NONE
		8	SHARED DISPOSITIVE POWER   14,658,121 shares of Common Stock
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON   14,658,121 shares of Common Stock
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐   Not applicable.
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9   1.9%
12	TYPE OF REPORTING PERSON   HC, CO

CUSIP No. 00507V109 13G Page 4 of 12 Pages

1	NAME OF REPORTING PERSON   National Indemnity Company
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP   (a)  ☒        (b)  ☐
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION   State of Nebraska
NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER   NONE
		6	SHARED VOTING POWER   12,304,470 shares of Common Stock
		7	SOLE DISPOSITIVE POWER   NONE
		8	SHARED DISPOSITIVE POWER   12,304,470 shares of Common Stock
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON   12,304,470 shares of Common Stock
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐   Not applicable.
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9   1.6%
12	TYPE OF REPORTING PERSON   IC, CO

CUSIP No. 00507V109 13G Page 5 of 12 Pages

1	NAME OF REPORTING PERSON   Berkshire Hathaway International Insurance Ltd.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP   (a)  ☒        (b)  ☐
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION   United Kingdom
NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER   NONE
		6	SHARED VOTING POWER   368,000 shares of Common Stock
		7	SOLE DISPOSITIVE POWER   NONE
		8	SHARED DISPOSITIVE POWER   368,000 shares of Common Stock
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON   368,000 shares of Common Stock
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐   Not applicable.
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9   Less than 0.1%
12	TYPE OF REPORTING PERSON   IC, CO

CUSIP No. 00507V109 13G Page 6 of 12 Pages

1	NAME OF REPORTING PERSON   Mount Vernon Fire Insurance Company
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP   (a)  ☒        (b)  ☐
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION   State of Nebraska
NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER   NONE
		6	SHARED VOTING POWER   68,979 shares of Common Stock
		7	SOLE DISPOSITIVE POWER   NONE
		8	SHARED DISPOSITIVE POWER   68,979 shares of Common Stock
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON   68,979 shares of Common Stock
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐   Not applicable.
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9   Less than 0.1%
12	TYPE OF REPORTING PERSON   IC, CO

CUSIP No. 00507V109 13G Page 7 of 12 Pages

1	NAME OF REPORTING PERSON   National Fire & Marine Insurance Company
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP   (a)  ☒        (b)  ☐
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION   State of Nebraska
NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER   NONE
		6	SHARED VOTING POWER   1,144,672 shares of Common Stock
		7	SOLE DISPOSITIVE POWER   NONE
		8	SHARED DISPOSITIVE POWER   1,144,672 shares of Common Stock
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON   1,144,672 shares of Common Stock
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐   Not applicable.
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9   0.1%
12	TYPE OF REPORTING PERSON   IC, CO

CUSIP No. 00507V109 13G Page 8 of 12 Pages

1	NAME OF REPORTING PERSON   NRG America Holding Company
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP   (a)  ☒        (b)  ☐
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION   State of Nebraska
NUMBER OF SHARES  BENEFICIALLY  OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER   NONE
		6	SHARED VOTING POWER   772,000 shares of Common Stock
		7	SOLE DISPOSITIVE POWER   NONE
		8	SHARED DISPOSITIVE POWER   772,000 shares of Common Stock
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON   772,000 shares of Common Stock
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ☐   Not applicable.
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9   0.1%
12	TYPE OF REPORTING PERSON   CO

Page 9 of 12 Pages

Item 1.

(a) Name of Issuer

Activision Blizzard, Inc.

(b) Address of Issuer’s Principal Executive Offices

2701 Olympic Blvd., Santa Monica, CA 90404

Item 2(a). Name of Person Filing:

Item 2(b). Address of Principal Business Office:

Item 2(c). Citizenship:

Warren E. Buffett 3555 Farnam Street Omaha, Nebraska 68131 United States Citizen	Berkshire Hathaway Inc. 3555 Farnam Street Omaha, Nebraska 68131 Delaware corporation
National Indemnity Company 1314 Douglas Street Omaha, Nebraska 68102 Nebraska corporation	Mount Vernon Fire Insurance Company 1190 Devon Park Drive Wayne, PA 19087 Nebraska corporation
Berkshire Hathaway International Insurance Ltd. 1314 Douglas Street Omaha, NE 68102 United Kingdom corporation	National Fire & Marine Insurance Company 1314 Douglas Street Omaha, NE 68102 Nebraska corporation
NRG America Holding Company 1314 Douglas Street Omaha, NE 68102 Nebraska corporation

Page 10 of 12 Pages

(d) Title of Class of Securities

Common Stock

(e) CUSIP Number

00507V109

Item 3. If this statement is filed pursuant to § 240.13d-1(b), or § 240.13d-2(b) or (c), check whether the person filing is a:

Warren E. Buffett (an individual who may be deemed to control Berkshire Hathaway Inc.) and Berkshire Hathaway Inc. are each a Parent Holding Company or Control Person, in accordance with § 240.13d-1(b)(1)(ii)(G).

National Indemnity Company, Berkshire Hathaway International Insurance Ltd., Mount Vernon Fire Insurance Company and National Fire & Marine Insurance Company are Insurance Companies as defined in section 3(a)(19) of the Act.

Item 4. Ownership

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a) Amount beneficially Owned

See the Cover Pages for each of the Reporting Persons.

(b) Percent of Class

See the Cover Pages for each of the Reporting Persons.

(c) Number of shares as to which such person has:

(i) sole power to vote or to direct the vote

(ii) shared power to vote or to direct the vote

Page 11 of 12 Pages

(iii) sole power to dispose or to direct the disposition of

(iv) shared power to dispose or to direct the disposition of

See the Cover Pages for each of the Reporting Persons.

Item 5. Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following ☒.

Item 6. Ownership of More than Five Percent on Behalf of Another Person.

Not Applicable.

Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.

See Exhibit A.

Item 8. Identification and Classification of Members of the Group.

See Exhibit A.

Item 9. Notice of Dissolution of Group.

Not Applicable.

Item 10. Certification.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

Page 12 of 12 Pages

SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated this 17th day of July, 2023

/s/ Warren E. Buffett
Warren E. Buffett
BERKSHIRE HATHAWAY INC.
By:	/s/ Warren E. Buffett
	Warren E. Buffett
	Chairman of the Board
NATIONAL INDEMNITY COMPANY, BERKSHIRE HATHAWAY INTERNATIONAL INSURANCE LTD., MOUNT VERNON FIRE INSURANCE COMPANY, NATIONAL FIRE & MARINE INSURANCE COMPANY AND NRG AMERICA HOLDING COMPANY
By:	/s/ Warren E. Buffett
	Warren E. Buffett Attorney-in-Fact

EX-99.A

SCHEDULE 13G

EXHIBIT A

RELEVANT SUBSIDIARIES AND MEMBERS OF FILING GROUP

PARENT HOLDING COMPANIES OR CONTROL PERSONS:

Warren E. Buffett (an individual who may be deemed to control Berkshire Hathaway Inc.)

Berkshire Hathaway Inc.

INSURANCE COMPANIES AS DEFINED IN SECTION 3(a)(19) OF THE ACT:

National Indemnity Company

Berkshire Hathaway International Insurance Ltd.

Mount Vernon Fire Insurance Company

National Fire & Marine Insurance Company

Note: No Common Stock of Activision Blizzard, Inc. is held directly by Berkshire Hathaway Inc. or by Warren E. Buffett, an individual who may be deemed to control Berkshire Hathaway Inc. 772,000 shares or approximately 0.1% of Common Stock of Activision Blizzard, Inc. are held directly by NRG America Holding Company, which is not a person specified in Rule 13d-1(b)(1)(ii)(A) through (J).

EX-99.B

SCHEDULE 13G

EXHIBIT B

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1)

The undersigned persons hereby agree that reports on Schedule 13G, and amendments thereto, with respect to the Common Stock of Store Capital Corporation. may be filed in a single statement on behalf of each of such persons, and further, each of such persons designates Warren E. Buffett as its agent and Attorney-in-Fact for the purpose of executing any and all Schedule 13G filings required to be made by it with the Securities and Exchange Commission.

Dated: July 17, 2023	/s/ Warren E. Buffett
	Warren E. Buffett
	Berkshire Hathaway Inc.
Dated: July 17, 2023	/s/ Warren E. Buffett
	By: Warren E. Buffett Title: Chairman of the Board
	National Indemnity Company
Dated: July 17, 2023	/s/ Marc D. Hamburg
	By: Marc D. Hamburg Title: Chairman of the Board
	Berkshire Hathaway International Insurance Ltd.
Dated: July 17, 2023	/s/ Dale D. Geistkemper
	By: Dale D. Geistkemper Title: Treasurer
	NRG America Holding Company
Dated: July 17, 2023	/s/ Dale D. Geistkemper
	By: Dale D. Geistkemper Title: Treasurer
	Mount Vernon Fire Insurance Company
Dated: July 17, 2023	/s/ Stephen J. Rivituso
	By: Stephen J. Rivituso Title: Executive Vice President
	National Fire & Marine Insurance Company
Dated: July 17, 2023	/s/ Marc D. Hamburg
	By: Marc D. Hamburg Title: Chairman