UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 13)*

Berkshire Hathaway Inc.

(Name of Issuer)

Class B common stock, $0.0033 Par Value

(Title of Class of Securities)

084670702

(CUSIP Number)

Laurie Smiley, Esq.

Tara Keating Brooks, Esq.

2365 Carillon Point

Kirkland, WA 98033

(425) 889-7900

(Name, Address and Telephone Number of Persons Authorized to
Receive Notices and Communications)

July 3, 2012

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. o

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

* 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 (“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. 084670702
	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Cascade Investment, L.L.C.
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			ý
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) WC
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) o
	6.	Citizenship or Place of Organization State of Washington
Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power 6,075,000(1)
			8.	Shared Voting Power -0-
			9.	Sole Dispositive Power 6,075,000(1)
			10.	Shared Dispositive Power -0-
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 6,075,000(1)

	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) o
	13.	Percent of Class Represented by Amount in Row (11) .6%
	14.	Type of Reporting Person (See Instructions) OO

(1)Cascade Investment, L.L.C. (“Cascade”) holds 4,050 shares of Berkshire Hathaway Inc. (the “Issuer”) Class A common stock (“Class A Shares”), each of which are convertible, at the option of the holder, into 1,500 shares of the Issuer’s Class B common stock (“Class B Shares”). The number of Class B Shares above assumes the conversion of the 4,050 Class A Shares held by Cascade into 6,075,000 Class B Shares. All shares of common stock held by Cascade may be deemed to be beneficially owned by William H. Gates III as the sole member of Cascade.

CUSIP No. 084670702

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Bill & Melinda Gates Foundation Trust
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			ý
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) OO
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) o
	6.	Citizenship or Place of Organization State of Washington
Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power -0-
			8.	Shared Voting Power 99,283,773(1)
			9.	Sole Dispositive Power -0-
			10.	Shared Dispositive Power 99,283,773(1)
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 99,283,773(1)
	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) o
	13.	Percent of Class Represented by Amount in Row (11) 9.2%
	14.	Type of Reporting Person (See Instructions) OO

(1) For purposes of Rule 13d-3 under the Securities Exchange Act of 1934, as amended, all common stock beneficially owned by Bill & Melinda Gates Foundation Trust (the “Trust”) may be deemed to be beneficially owned by William H. Gates III and Melinda French Gates, as Co-Trustees of the Trust.

CUSIP No. 084670702
	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) William H. Gates III
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			ý
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) WC, OO
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) o
	6.	Citizenship or Place of Organization United States of America
Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power 6,525,000(1)
			8.	Shared Voting Power 99,283,773 (2)
			9.	Sole Dispositive Power 6,525,000(1)
			10.	Shared Dispositive Power 99,283,773 (2)
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 105,808,773(1) (2)

	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) o
	13.	Percent of Class Represented by Amount in Row (11) 9.8%
	14.	Type of Reporting Person (See Instructions) IN

(1)William H. Gates III beneficially owns 300 shares of Berkshire Hathaway Inc. (the “Issuer”) Class A common stock (“Class A Shares”) directly and an additional 4,050 Class A Shares through Cascade Investment, L.L.C. (“Cascade”), a limited liability company solely owned by Mr. Gates. Each Class A Share is convertible, at the option of the holder, into 1,500 shares of the Issuer’s Class B common stock (“Class B Shares”). The number of Class B Shares shown above assumes the conversion of the 300 Class A Shares held directly by Mr. Gates into 450,000 Class B Shares and the conversion of the 4,050 Class A Shares held by Cascade into 6,075,000 Class B Shares.

(2)Bill & Melinda Gates Foundation Trust (the “Trust”) beneficially owns 99,283,773 shares of the Issuer’s Class B Shares. For purposes of Rule 13d-3 under the Securities Exchange Act of 1934, as amended, all Class B Shares beneficially owned by the Trust may be deemed to be beneficially owned by William H. Gates III and Melinda French Gates, as Co-Trustees of the Trust.

CUSIP No. 084670702
	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Melinda French Gates
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			ý
	3.	SEC Use Only
	4.	Source of Funds (See Instructions) OO
	5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) o
	6.	Citizenship or Place of Organization United States of America
Number of Shares Beneficially Owned by Each Reporting Person With			7.	Sole Voting Power -0-
			8.	Shared Voting Power 99,283,773 (1)
			9.	Sole Dispositive Power -0-
			10.	Shared Dispositive Power 99,283,773 (1)
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person 99,283,773 (1)
	12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) o
	13.	Percent of Class Represented by Amount in Row (11) 9.2%
	14.	Type of Reporting Person (See Instructions) IN

(1) Bill & Melinda Gates Foundation Trust (the “Trust”) beneficially owns 99,283,773 shares of Berkshire Hathaway Inc. Class B common stock (“Class B Shares”). For purposes of Rule 13d-3 under the Securities Exchange Act of 1934, as amended, all Class B Shares beneficially owned by the Trust may be deemed to be beneficially owned by William H. Gates III and Melinda French Gates, as Co-Trustees of the Trust.

EXPLANATORY STATEMENT

This Amendment No. 13 to Schedule 13D (“Amendment”) relates to the Class B common stock, $0.0033 Par Value (“Class B Shares”) of Berkshire Hathaway Inc. (the “Issuer”). Cascade Investment, L.L.C., (“Cascade”), Bill & Melinda Gates Foundation Trust (the “Trust”), William H. Gates III and Melinda French Gates (collectively, the “Reporting Persons”) jointly file this Amendment to amend and supplement the Items set forth below of the Reporting Persons’ Schedule 13D previously filed with the Securities and Exchange Commission on August 24, 2006, as amended on July 17, 2007, March 20, 2008, July 3, 2008, March 6, 2009, July 2, 2009, March 2, 2010, March 19, 2010, July 2, 2010, November 12, 2010, March 18, 2011, July 7, 2011 and January 13, 2012. Neither the present filing nor anything contained herein shall be construed as an admission that the Reporting Persons constitute a “group” for any purpose and the Reporting Persons expressly disclaim membership in a group.

Item 5. Interest in Securities of the Issuer.

(a) See Items 11 and 13 of the cover pages to this Amendment for the aggregate number and percentage of Class B Shares beneficially owned by each of the Reporting Persons.

(b) See Items 7 through 10 of the cover pages to this Amendment for the number of Class B Shares beneficially owned by each of the Reporting Persons as to which there is sole or shared power to vote or to direct the vote and sole or shared power to dispose or to direct the disposition.

(c) During the period May 4, 2012 through July 5, 2012, the Trust sold 3,457,600 Class B Shares, as set forth in Exhibit 99.1 hereto, pursuant to the Trust’s Rule 10b5-1(c)(1) sales plan. The sales were made to facilitate compliance with federal excise tax rules limiting excess business holdings by private foundations.

On July 6, 2012, the Trust received 18,377,296 Class B Shares as a gift from Warren E. Buffett. The closing price per share of Class B Shares on July 6, 2012 was $82.54.

(d) None.

(e) Not applicable.

Item 7. Material to be Filed as Exhibits

Exhibit 99.1 Sale transactions during the period May 4, 2012 through July 5, 2012

SIGNATURE

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.

Date: July 6, 2012	CASCADE INVESTMENT, L.L.C.(1)
	By:		*
			Name:	Alan Heuberger(2)
			Title:	Attorney-in-fact for Michael Larson,
				Business Manager

	BILL & MELINDA GATES FOUNDATION TRUST(1)
	By:		*
			Name:	Alan Heuberger (3)
			Title:	Attorney-in-fact for each of the Co- Trustees, William H. Gates III and Melinda French Gates

	WILLIAM H. GATES III(1)
	By:		*
			Name:	Alan Heuberger(3)(4)
			Title:	Attorney-in-fact

	MELINDA FRENCH GATES(1)
	By:		*
			Name:	Alan Heuberger (3)
			Title:	Attorney-in-fact

*By:		/s/ Alan Heuberger
		Alan Heuberger

(1)This Amendment is being filed jointly by the Reporting Persons pursuant to the Joint Filing Agreement dated August 24, 2006 and included with the signature page to the Reporting Persons’ Schedule 13D with respect to the Issuer filed on August 24, 2006, SEC File No. 005-55113, and incorporated by reference herein.

(2)Duly authorized under Special Limited Power of Attorney appointing Alan Heuberger attorney-in-fact, dated August 12, 2008, by and on behalf of Michael Larson, filed as Exhibit 99.1 to Amendment No. 1 to Cascade’s Schedule 13D with respect to Otter Tail Corporation on April 15, 2009, SEC File No. 005-06638 and incorporated by reference herein.

(3)Duly authorized under Special Limited Power of Attorney appointing Alan Heuberger attorney-in-fact, dated August 12, 2008, by and on behalf of William H. Gates III and Melinda French Gates as Co-Trustees, filed as Exhibit 99.5 to Cascade’s Schedule 13D with respect to Grupo Televisa, S.A.B. on May 7, 2009, SEC File No. 005-60431 and incorporated by reference herein.

(4)Duly authorized under Special Limited Power of Attorney appointing Alan Heuberger attorney-in-fact, dated August 12, 2008, by and on behalf of William H. Gates III, filed as Exhibit 99.2 to Amendment No. 1 to Cascade’s Schedule 13D with respect to Otter Tail Corporation on April 15, 2009, SEC File No. 005-06638 and incorporated by reference herein.