SC 13D/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934
(Amendment No. 21)*

Berkshire Hathaway Inc.

(Name of Issuer)

Class B common stock, $0.0033 Par Value

(Title of Class of Securities)

084670702

(CUSIP Number)

Mike Rodden, Esq.

Jacki Badal, Esq.

2365 Carillon Point

Kirkland, WA 98033

(425) 889-7900

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

April 4, 2018

(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 Rule 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 Cascade Investment, L.L.C.
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			x
	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 Power6,075,000 (1)
			10.	Shared Dispositive Power -0-
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person6,075,000 (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)0.4% (2)
	14.	Type of Reporting Person (See Instructions) OO

(1)Cascade Investment, L.L.C. (“Cascade”) holds 4,050 shares of the Class A common stock (“Class A Shares”) of Berkshire Hathaway Inc. (the “Issuer”). 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 above assumes the conversion of Cascade’s 4,050 Class A Shares 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.

(2)Based on an outstanding shares calculation equal to the sum of (i) 1,344,969,701 Class B Shares outstanding as of March 7, 2018, as reported on the Issuer’s proxy statement filed on March 16, 2018, and (ii) 6,075,000, which is the number of Class B Shares into which all Class A Shares held by Cascade may be converted.

2

CUSIP No.   084670702
	1.	Names of Reporting Persons Bill & Melinda Gates Foundation Trust
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			x
	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 Power58,335,672 (1)
			9.	Sole Dispositive Power -0-
			10.	Shared Dispositive Power58,335,672 (1)
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person58,335,672 (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)4.3% (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 shares of the Class B common stock (“Class B Shares”) of Berkshire Hathaway Inc. (the “Issuer”) 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.

(2)Based on 1,344,969,701 Class B Shares outstanding as of March 7, 2018, as reported on the Issuer’s proxy statement filed on March 16, 2018.

3

CUSIP No.   084670702
	1.	Names of Reporting Persons William H. Gates III
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			x
	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 58,335,672 (2)
			9.	Sole Dispositive Power 6,525,000 (1)
			10.	Shared Dispositive Power 58,335,672 (2)
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person64,860,672 (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)4.8% (3)
	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 58,335,672 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.

(3)Based on an outstanding shares calculation equal to the sum of (i) 1,344,969,701 Class B Shares outstanding as of March 7, 2018, as reported on the Issuer’s proxy statement filed on March 16, 2018, and (ii) 6,525,000, which is the number of Class B Shares into which all Class A Shares held by Cascade and by Mr. Gates may be converted.

4

CUSIP No.   084670702
	1.	Names of Reporting Persons Melinda French Gates
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)			o
		(b)			x
	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 58,335,672 (1)
			9.	Sole Dispositive Power -0-
			10.	Shared Dispositive Power 58,335,672 (1)
	11.	Aggregate Amount Beneficially Owned by Each Reporting Person58,335,672 (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)4.3% (2)
	14.	Type of Reporting Person (See Instructions) IN

(1)Bill & Melinda Gates Foundation Trust (the “Trust”) beneficially owns 58,335,672 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.

(2)Based on 1,344,969,701 Class B Shares outstanding as of March 7, 2018, as reported on the Issuer’s proxy statement filed on March 16, 2018.

5

EXPLANATORY STATEMENT

This Amendment No. 21 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 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; January 13, 2012; July 6, 2012; November 19, 2012; March 28, 2013; July 10, 2013; December 13, 2013; January 15, 2014; April 3, 2015; and January 17, 2017. The information set forth in response to each separate Item below shall be deemed to be a response to all Items where such information is relevant. The information set forth in the exhibits to this Schedule 13D, as amended, is expressly incorporated herein by reference and the response to each Item of this Amendment is qualified in its entirety by the provisions of such exhibits.  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 3.Source and Amount of Funds or Other Consideration

Since its last Schedule 13D amendment, the Trust has received a gift of Class B Shares from Warren E. Buffett:

·14,220,001 Class B Shares donated on July 10, 2017. The closing price of a Class B Share on July 10, 2017, was $170.25.

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 of shares and percentage of Class B Shares beneficially owned by each of the Reporting Persons as of April 4, 2018.

(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 power to vote or to direct the vote, shared power to vote or to direct the vote and sole or shared power to dispose or to direct the disposition as of April 4, 2018.

(c)During the period from February 3, 2018, through April 4, 2018, the Trust sold 3,353,200 Class B Shares, as set forth in Exhibit 99.1 hereto, pursuant to the Trust’s Rule 10b5-1 sales plan. The sales were made to facilitate compliance with federal excise tax rules limiting excess business holdings by private foundations.

(d)None.

(e)The Trust and Mrs. Gates ceased to be beneficial owners of more than five percent of the Class B Shares of the Issuer on November 2, 2017.

Mr. Gates ceased to be the beneficial owner of more than five percent of the Class B Shares of the Issuer on February 22, 2018.

Item 7.Material to be Filed as Exhibits

Exhibit 99.1Sale transactions during the period from February 3, 2018, through April 4, 2018.

6

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: April 6, 2018	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 October 11, 2013, by and on behalf of Michael Larson, filed as Exhibit 99.1 to Amendment No. 9 to Cascade’s Schedule 13D with respect to Western Asset/Claymore Inflation-Linked Opportunities & Income Fund on December 11, 2013, SEC File No. 005-81261, 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.

	ATTENTION
Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001).

7

EX-99.1

EXHIBIT 99.1

The table below specifies the date of the transaction, number of shares, weighted-average price per share and range of price per share of Class B common stock of Berkshire Hathaway Inc. sold by Bill & Melinda Gates Foundation Trust (the “Trust”) during the period from February 3, 2018, through April 4, 2018.  The Trust undertakes to provide upon request by the staff of the Securities and Exchange Commission full information regarding the number of shares sold at each separate price. All transactions were effected in the open market.

	Number of	Weighted Average	Range of Price per Share ($)
Date of Transaction	Shares Sold	Price per Share ($)	Low	High
April 4, 2018	5,299	194.7863	194.1350	195.1300
April 4, 2018	16,494	195.6955	195.1400	196.1300
April 4, 2018	11,207	196.5425	196.1400	197.1200
April 4, 2018	1,200	197.2942	197.1400	198.1300
April 4, 2018	15,572	198.7775	198.1900	199.1300
April 4, 2018	16,292	199.6506	199.1400	200.1300
April 4, 2018	12,036	200.3562	200.1400	200.5000
April 3, 2018	9,668	194.6185	193.9700	194.9600
April 3, 2018	37,570	195.3934	194.9700	195.9600
April 3, 2018	11,664	196.5523	195.9800	196.9600
April 3, 2018	18,998	197.3725	196.9700	197.9100
April 3, 2018	200	197.9950	197.9900	198.0000
April 2, 2018	7,548	192.7922	192.1200	193.1100
April 2, 2018	30,636	193.5573	193.1200	194.1100
April 2, 2018	18,916	194.5769	194.1200	195.0900
April 2, 2018	6,587	195.5419	195.1200	196.1100
April 2, 2018	6,298	196.6453	196.1200	197.1100
April 2, 2018	5,294	197.6257	197.1200	198.1100
April 2, 2018	2,821	198.3398	198.1500	198.8800
March 29, 2018	9,592	197.8260	197.3400	198.3000
March 29, 2018	15,136	198.8580	198.3500	199.3300
March 29, 2018	49,605	199.7879	199.3400	200.3300
March 29, 2018	14,267	200.5661	200.3400	200.9800
March 28, 2018	5,500	194.3827	193.8300	194.8200
March 28, 2018	11,238	195.3705	194.8300	195.8200
March 28, 2018	31,380	196.4970	195.8300	196.8200
March 28, 2018	31,982	197.1955	196.8300	197.8200
March 28, 2018	1,800	198.2422	197.9400	198.6300
March 27, 2018	9,027	195.2341	194.5800	195.5500
March 27, 2018	7,881	195.8831	195.5800	196.5700
March 27, 2018	5,638	197.0471	196.5800	197.5300
March 27, 2018	3,509	198.3365	197.5900	198.5400
March 27, 2018	17,750	199.1716	198.5900	199.5700
March 27, 2018	22,560	200.1394	199.5800	200.5700
March 27, 2018	15,535	200.9201	200.5800	201.3200
March 26, 2018	8,653	195.7292	195.1000	196.0900
March 26, 2018	16,287	196.5180	196.1100	197.0900
March 26, 2018	17,310	197.7119	197.1000	198.0900
March 26, 2018	25,251	198.6682	198.1000	199.0950
March 26, 2018	14,399	199.3131	199.1000	199.5600
March 23, 2018	6,170	192.4659	191.9000	192.8900
March 23, 2018	11,920	193.3517	192.9100	193.8600
March 23, 2018	2,900	194.1852	193.9000	194.5300
March 23, 2018	4,400	195.4239	194.9000	195.8900
March 23, 2018	32,762	196.4315	195.9300	196.8900
March 23, 2018	22,148	197.3802	196.9000	197.8900

	Number of	Weighted Average	Range of Price per Share ($)
Date of Transaction	Shares Sold	Price per Share ($)	Low	High
March 23, 2018	1,600	198.0613	197.9100	198.2700
March 22, 2018	7,396	197.7765	197.0400	198.0300
March 22, 2018	10,416	198.3670	198.0400	199.0300
March 22, 2018	23,114	199.6097	199.0400	200.0300
March 22, 2018	19,223	200.4784	200.0400	201.0200
March 22, 2018	15,950	201.4349	201.0400	201.9800
March 22, 2018	5,501	202.4805	202.0500	203.0200
March 22, 2018	300	203.0733	203.0600	203.0900
March 21, 2018	20,966	204.4993	204.0100	205.0000
March 21, 2018	34,898	205.4833	205.0100	206.0050
March 21, 2018	24,936	206.3799	206.0100	206.9200
March 21, 2018	1,100	207.0873	207.0200	207.1600
March 20, 2018	56,062	204.5011	203.8200	204.8100
March 20, 2018	25,838	205.0647	204.8200	205.5200
March 19, 2018	36,978	203.2949	202.6600	203.6500
March 19, 2018	12,212	204.0980	203.6700	204.6500
March 19, 2018	11,062	205.1251	204.6600	205.6500
March 19, 2018	17,448	206.3014	205.6600	206.6500
March 19, 2018	4,200	206.7852	206.6600	207.0000
March 16, 2018	46,737	207.0059	206.5000	207.4800
March 16, 2018	27,689	207.9577	207.5000	208.4500
March 16, 2018	7,474	208.6337	208.5100	208.9000
March 15, 2018	57,375	208.1050	207.6400	208.6300
March 15, 2018	24,525	208.9185	208.6400	209.2650
March 14, 2018	36,150	206.9069	206.2900	207.2800
March 14, 2018	21,739	207.6155	207.2900	208.2800
March 14, 2018	17,774	208.8180	208.2900	209.2800
March 14, 2018	6,237	209.5244	209.2900	209.8700
March 13, 2018	22,222	209.2689	208.8500	209.8200
March 13, 2018	22,183	210.4318	209.8500	210.8400
March 13, 2018	16,166	211.1156	210.8500	211.8300
March 13, 2018	19,934	212.4119	211.8500	212.8400
March 13, 2018	1,395	212.9030	212.8500	212.9900
March 12, 2018	54,353	211.7610	211.2400	212.2300
March 12, 2018	27,125	212.6322	212.2400	213.2200
March 12, 2018	422	213.2945	213.2400	213.3500
March 9, 2018	6,440	206.9192	206.5100	207.4900
March 9, 2018	5,700	208.0472	207.6000	208.4500
March 9, 2018	17,455	209.1561	208.6000	209.4900
March 9, 2018	12,180	210.0169	209.5100	210.5000
March 9, 2018	9,360	211.1026	210.5500	211.5000
March 9, 2018	28,858	211.8152	211.5100	212.4400
March 9, 2018	1,907	212.8400	212.5700	213.1600
March 8, 2018	42,121	203.5925	203.0600	204.0500
March 8, 2018	39,370	204.5278	204.0600	205.0200
March 8, 2018	409	205.2431	205.1200	205.3800
March 7, 2018	23,757	202.3830	201.8000	202.7900
March 7, 2018	35,791	203.1806	202.8000	203.7500
March 7, 2018	22,152	204.3220	203.8100	204.7900
March 7, 2018	200	204.8200	204.8200	204.8200
March 6, 2018	29,404	203.0737	202.4400	203.4300
March 6, 2018	44,787	204.0891	203.4500	204.4300
March 6, 2018	7,709	204.5189	204.4400	204.6100

	Number of	Weighted Average	Range of Price per Share ($)
Date of Transaction	Shares Sold	Price per Share ($)	Low	High
March 5, 2018	10,639	200.3922	199.8200	200.8000
March 5, 2018	7,350	201.2040	200.8200	201.7500
March 5, 2018	9,356	202.5352	201.8800	202.8100
March 5, 2018	51,906	203.3945	202.8200	203.8100
March 5, 2018	2,649	203.8733	203.8200	204.0000
March 2, 2018	23,206	199.7543	199.0900	200.0800
March 2, 2018	38,204	200.5078	200.0900	201.0800
March 2, 2018	20,490	201.4387	201.0900	201.9200
March 1, 2018	13,042	200.9777	200.3400	201.3300
March 1, 2018	26,354	201.8437	201.3500	202.3300
March 1, 2018	5,948	202.6444	202.3400	203.2900
March 1, 2018	9,254	203.9232	203.3400	204.3200
March 1, 2018	4,102	205.1527	204.3800	205.3200
March 1, 2018	8,880	205.9267	205.3400	206.3200
March 1, 2018	13,920	206.6866	206.3400	207.3200
March 1, 2018	400	207.3875	207.3600	207.4400
February 28, 2018	11,790	208.0959	207.7700	208.7600
February 28, 2018	13,551	209.2010	208.7700	209.7500
February 28, 2018	32,943	210.4259	209.7700	210.7600
February 28, 2018	23,616	211.0396	210.7700	211.4700
February 27, 2018	18,632	210.5670	209.9200	210.9100
February 27, 2018	28,468	211.4702	210.9200	211.9100
February 27, 2018	34,300	212.3571	211.9200	212.9000
February 27, 2018	500	212.9860	212.9200	213.0300
February 26, 2018	12,299	206.1043	205.4400	206.4200
February 26, 2018	1,221	206.9475	206.4600	207.4000
February 26, 2018	7,859	207.8448	207.4500	208.4300
February 26, 2018	13,421	208.9231	208.4400	209.3700
February 26, 2018	29,587	210.0434	209.4400	210.4300
February 26, 2018	17,513	210.7099	210.4400	211.1100
February 23, 2018	53,886	201.4060	200.8400	201.8300
February 23, 2018	27,914	202.1902	201.8400	202.7700
February 23, 2018	100	202.8550	202.8550	202.8550
February 22, 2018	34,631	200.8155	200.2300	201.2200
February 22, 2018	22,206	201.8247	201.2300	202.2200
February 22, 2018	24,563	202.7358	202.2300	203.2200
February 22, 2018	500	203.2560	203.2400	203.2800
February 21, 2018	7,328	201.4260	200.9600	201.9500
February 21, 2018	14,000	202.5030	201.9700	202.9500
February 21, 2018	44,214	203.5470	202.9600	203.9500
February 21, 2018	14,098	204.3854	203.9600	204.9500
February 21, 2018	2,260	205.0590	204.9600	205.2100
February 20, 2018	32,581	202.9964	202.3600	203.3550
February 20, 2018	47,819	203.7948	203.3600	204.3500
February 20, 2018	1,500	204.3880	204.3600	204.5200
February 16, 2018	12,778	203.6785	203.1800	204.1700
February 16, 2018	58,122	204.7276	204.1900	205.1700
February 16, 2018	10,300	205.4807	205.1800	206.1700
February 16, 2018	700	206.2486	206.2000	206.2900
February 15, 2018	5,300	200.9281	200.3200	201.3100
February 15, 2018	33,811	202.0097	201.3200	202.3100
February 15, 2018	35,892	202.8010	202.3200	203.3100
February 15, 2018	6,897	203.4333	203.3200	203.7200

	Number of	Weighted Average	Range of Price per Share ($)
Date of Transaction	Shares Sold	Price per Share ($)	Low	High
February 14, 2018	6,400	196.6267	196.0300	197.0100
February 14, 2018	29,604	197.5473	197.0500	198.0200
February 14, 2018	5,472	198.3317	198.0300	199.0200
February 14, 2018	17,714	199.5822	199.0400	200.0100
February 14, 2018	22,710	200.3873	200.0400	200.7100
February 13, 2018	10,050	196.6483	195.9900	196.9800
February 13, 2018	27,111	197.3586	196.9900	197.9700
February 13, 2018	44,739	198.3694	197.9900	198.8300
February 12, 2018	6,488	196.9309	196.2600	197.2500
February 12, 2018	15,106	197.8237	197.2600	198.2500
February 12, 2018	19,914	198.8476	198.2600	199.2500
February 12, 2018	37,001	199.7739	199.2600	200.2500
February 12, 2018	3,391	200.3653	200.2600	200.6500
February 9, 2018	6,207	190.0626	189.3100	190.3000
February 9, 2018	13,031	190.6161	190.3100	191.2700
February 9, 2018	4,553	191.7605	191.3300	192.2000
February 9, 2018	7,378	192.9126	192.3100	193.3000
February 9, 2018	17,212	193.8681	193.3100	194.3000
February 9, 2018	18,320	194.7430	194.3100	195.3000
February 9, 2018	6,328	195.7979	195.3100	196.3000
February 9, 2018	8,271	196.7797	196.3100	197.2800
February 9, 2018	600	197.3950	197.3200	197.4700
February 8, 2018	11,513	192.8054	192.2800	193.2700
February 8, 2018	4,005	193.7545	193.2900	194.2700
February 8, 2018	17,128	194.8735	194.2900	195.2700
February 8, 2018	19,400	195.6870	195.2900	196.2700
February 8, 2018	14,293	196.6585	196.3000	197.2600
February 8, 2018	11,225	197.8120	197.2800	198.2600
February 8, 2018	4,336	198.6191	198.2800	199.1800
February 7, 2018	16,116	201.6260	201.0500	202.0300
February 7, 2018	33,509	202.5155	202.0500	203.0400
February 7, 2018	30,825	203.4085	203.0500	204.0400
February 7, 2018	1,450	204.1838	204.0600	204.4100
February 6, 2018	200	192.1200	192.0000	192.2400
February 6, 2018	1,700	194.8276	194.6100	194.9900
February 6, 2018	11,841	195.4842	195.0100	195.9800
February 6, 2018	25,928	196.5312	196.0000	196.9900
February 6, 2018	10,522	197.4059	197.0000	197.9900
February 6, 2018	6,881	198.4468	198.0000	198.9900
February 6, 2018	7,584	199.6453	199.0000	199.9900
February 6, 2018	10,911	200.5265	200.0000	200.9900
February 6, 2018	6,333	201.3362	201.0600	201.8900
February 5, 2018	400	196.6100	196.3600	196.7500
February 5, 2018	6,661	197.9956	197.4600	198.3500
February 5, 2018	3,721	198.7915	198.3700	199.3000
February 5, 2018	8,237	199.9181	199.3600	200.3400
February 5, 2018	9,027	200.8207	200.3700	201.3400
February 5, 2018	3,842	201.5957	201.3700	202.3500
February 5, 2018	10,079	202.8231	202.4100	203.3500
February 5, 2018	3,582	203.8230	203.3700	204.3200
February 5, 2018	14,186	204.8670	204.3600	205.3000
February 5, 2018	10,981	205.9478	205.3900	206.3500
February 5, 2018	11,184	206.7633	206.3600	207.0800