DVA

SEC source: 0000927066-26-000126 · wk-form4_1790281335.xml · nonDerivative · entry 1

Maughan David Paul · CIK 0002037895 · Chief Operating Officer, DKC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 86,604

F1 · shares: Shares withheld from issuance to satisfy tax withholding obligation in connection with the vesting of 17,145 shares, which represents the remaining 50% of the restricted stock units granted to the Reporting Person on September 22, 2022.

SEC source: 0000927066-26-000124 · wk-form4_1787091048.xml · nonDerivative · entry 1

Hollar Jason M. · CIK 0001687858 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,883

SEC source: 0000927066-26-000123 · wk-form4_1787091041.xml · nonDerivative · entry 1

DESOER BARBARA J · CIK 0001189881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 278

SEC source: 0000927066-26-000122 · wk-form4_1787091036.xml · nonDerivative · entry 1

Schechter Adam H · CIK 0001376841 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,970

SEC source: 0000927066-26-000121 · wk-form4_1787091030.xml · nonDerivative · entry 1

Moore Gregory J. · CIK 0001775520 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,091

SEC source: 0000927066-26-000120 · wk-form4_1787091025.xml · nonDerivative · entry 1

Pullin Dennis W · CIK 0001861249 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,949

SEC source: 0000927066-26-000119 · wk-form4_1787091019.xml · nonDerivative · entry 1

Schoppert Wendy Lee · CIK 0001321558 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 278

SEC source: 0000927066-26-000118 · wk-form4_1787091013.xml · nonDerivative · entry 1

Arway Pamela M · CIK 0001464822 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,223

SEC source: 0000927066-26-000117 · wk-form4_1787091007.xml · nonDerivative · entry 1

YALE PHYLLIS R · CIK 0001269070 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,803

SEC source: 0001193125-26-333151 · ownership.xml · nonDerivative · entry 1

BERKSHIRE HATHAWAY INC · CIK 0001067983 · 10% owner

BUFFETT WARREN E · CIK 0000315090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 28,697,229

F1 · ownership.nature: 13,723,621 of the total reported securities are owned by Government Employees Insurance Company, a subsidiary of Berkshire Hathaway Inc. ("Berkshire"). As Berkshire is in the chain of ownership of this subsidiary, it may be deemed presently to both beneficially own and have a pecuniary interest in all shares of Common Stock presently owned by the subsidiary. Warren E. Buffett, as the controlling stockholder of Berkshire, may be deemed presently to beneficially own, but only to the extent he has a pecuniary interest in, the shares of Common Stock presently owned by the subsidiary. Mr. Buffett disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

F2 · ownership.nature: 14,973,608 of the total reported securities are owned by the following pension plans of Berkshire's subsidiaries: BNSF Master Retirement Trust (4,441,520) and Berkshire Hathaway Inc. Consolidated Pension Plan (10,532,088); each of Berkshire, Mr. Buffett and these pensions plan disclaim beneficial ownership in such shares.

SEC source: 0000927066-26-000098 · wk-form4_1781734172.xml · nonDerivative · entry 2

Rodriguez Javier · CIK 0001415548 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 840,408

F2 · price: Represents the weighted average sale price of $209.278. The range of prices for the sale of these shares was $209.200 - $209.800 rounded to the nearest hundredths. The reporting person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000927066-26-000099 · wk-form4_1781734221.xml · nonDerivative · entry 2

Waters Kathleen Alyce · CIK 0001640409 · Chief Legal & Pub. Affairs Off

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 109,194

F2 · kind: The transaction reported on this line of this Form 4 was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 16, 2026.

F3 · price: Represents the weighted average sale price of $209.167. The range of prices for the sale of these shares was $206.115 - $210.410 rounded to the nearest hundredths. The reporting person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000927066-26-000099 · wk-form4_1781734221.xml · nonDerivative · entry 1

Waters Kathleen Alyce · CIK 0001640409 · Chief Legal & Pub. Affairs Off

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 115,649

F1 · price: Represents the weighted average sale price of $207.844. The range of prices for the sale of these shares was $206.115 - $208.780 rounded to the nearest hundredths. The reporting person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000927066-26-000098 · wk-form4_1781734172.xml · nonDerivative · entry 1

Rodriguez Javier · CIK 0001415548 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 879,815

F1 · price: Represents the weighted average sale price of $209.503. The range of prices for the sale of these shares was $209.000 - $210.140 rounded to the nearest hundredths. The reporting person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000927066-26-000088 · wk-form4_1779999770.xml · nonDerivative · entry 1

YALE PHYLLIS R · CIK 0001269070 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,525

SEC source: 0000927066-26-000085 · wk-form4_1779135114.xml · nonDerivative · entry 1

Pullin Dennis W · CIK 0001861249 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,671

SEC source: 0000927066-26-000084 · wk-form4_1779135108.xml · nonDerivative · entry 1

Moore Gregory J. · CIK 0001775520 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,813

SEC source: 0000927066-26-000083 · wk-form4_1779135102.xml · nonDerivative · entry 1

Schoppert Wendy Lee · CIK 0001321558 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 250

SEC source: 0000927066-26-000082 · wk-form4_1779135096.xml · nonDerivative · entry 1

Arway Pamela M · CIK 0001464822 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,945

SEC source: 0000927066-26-000081 · wk-form4_1779135090.xml · nonDerivative · entry 1

YALE PHYLLIS R · CIK 0001269070 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,563

SEC source: 0000927066-26-000080 · wk-form4_1779135082.xml · nonDerivative · entry 1

DESOER BARBARA J · CIK 0001189881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 250

SEC source: 0000927066-26-000079 · wk-form4_1779135078.xml · nonDerivative · entry 1

Schechter Adam H · CIK 0001376841 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,692

SEC source: 0000927066-26-000078 · wk-form4_1779135073.xml · nonDerivative · entry 1

Hollar Jason M. · CIK 0001687858 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,605

SEC source: 0000927066-26-000069 · wk-form4_1779134929.xml · nonDerivative · entry 4

HEARTY JAMES O · CIK 0001735907 · Chief Compliance Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,389

F3 · price: Represents the weighted average sale price of $193.983. The range of prices for the sale of these shares was $193.360 - $199.840 rounded to the nearest hundredths. The reporting person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000927066-26-000069 · wk-form4_1779134929.xml · derivative · entry 5

HEARTY JAMES O · CIK 0001735907 · Chief Compliance Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,784 shares

Expires 2027-03-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: The Stock Appreciation Rights were granted on March 15, 2022, which vested 50% each on March 15, 2025 and March 15, 2026.

SEC source: 0000927066-26-000069 · wk-form4_1779134929.xml · nonDerivative · entry 3

HEARTY JAMES O · CIK 0001735907 · Chief Compliance Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,389

F2 · shares: Represents the shares withheld to satisfy the tax withholding obligation in connection with the exercise of Stock Appreciation Rights reported on this Form 4.

SEC source: 0000927066-26-000069 · wk-form4_1779134929.xml · nonDerivative · entry 2

HEARTY JAMES O · CIK 0001735907 · Chief Compliance Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,506

F1 · shares: Represents the shares withheld in payment of the base price in connection with the exercise of Stock Appreciation Rights reported on this Form 4.

SEC source: 0000927066-26-000069 · wk-form4_1779134929.xml · nonDerivative · entry 1

HEARTY JAMES O · CIK 0001735907 · Chief Compliance Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,737

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000927066-26-000067 · wk-form4_1778703020.xml · nonDerivative · entry 2

Maughan David Paul · CIK 0002037895 · Chief Operating Officer, DKC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 94,105

F2 · price: Represents the weighted average sale price of $199.254. The range of prices for the sale of these shares was $199.000 - $199.840 rounded to the nearest hundredths. The reporting person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000927066-26-000067 · wk-form4_1778703020.xml · nonDerivative · entry 1

Maughan David Paul · CIK 0002037895 · Chief Operating Officer, DKC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,561

F1 · price: Represents the weighted average sale price of $199.148. The range of prices for the sale of these shares was $199.000 - $199.840 rounded to the nearest hundredths. The reporting person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000927066-26-000065 · wk-form4_1778529957.xml · nonDerivative · entry 1

ACKERMAN JOEL · CIK 0001220630 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 132,434

F1 · price: Represents the weighted average sale price of $192.099. The range of prices for the sale of these shares was $191.510 - $192.765 rounded to the nearest hundredths. The reporting person undertakes to provide upon request by the Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000927066-26-000064 · wk-form4_1778270661.xml · nonDerivative · entry 1

HEARTY JAMES O · CIK 0001735907 · Chief Compliance Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,953

F1 · kind: The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 15, 2025.

SEC source: 0001193125-26-207021 · ownership.xml · nonDerivative · entry 1

BERKSHIRE HATHAWAY INC · CIK 0001067983 · 10% owner

BUFFETT WARREN E · CIK 0000315090 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 28,880,209

F1 · ownership.nature: 13,906,601 of the total reported securities are owned by Government Employees Insurance Company, a subsidiary of Berkshire Hathaway Inc. ("Berkshire"). As Berkshire is in the chain of ownership of this subsidiary, it may be deemed presently to both beneficially own and have a pecuniary interest in all shares of Common Stock presently owned by the subsidiary. Warren E. Buffett, as the controlling stockholder of Berkshire, may be deemed presently to beneficially own, but only to the extent he has a pecuniary interest in, the shares of Common Stock presently owned by the subsidiary. Mr. Buffett disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

F2 · ownership.nature: 14,973,608 of the total reported securities are owned by the following pension plans of Berkshire's subsidiaries: BNSF Master Retirement Trust (4,441,520) and Berkshire Hathaway Inc. Consolidated Pension Plan (10,532,088); each of Berkshire, Mr. Buffett and these pensions plan disclaim beneficial ownership in such shares.

SEC source: 0000927066-26-000046 · wk-form4_1773778224.xml · nonDerivative · entry 1

Arway Pamela M · CIK 0001464822 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,695

SEC source: 0000927066-26-000045 · wk-form4_1773778208.xml · nonDerivative · entry 1

DESOER BARBARA J · CIK 0001189881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 332

SEC source: 0000927066-26-000044 · wk-form4_1773778200.xml · derivative · entry 4

Maughan David Paul · CIK 0002037895 · Chief Operating Officer, DKC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,351

Underlying: Common Stock · 14,351 shares

Expires 2031-03-15

F5 · derivative.exercise_date: The stock appreciation rights are scheduled to vest 50% each on March 15, 2029 and March 15, 2030, respectively, subject to the terms and conditions of the applicable award agreement.

SEC source: 0000927066-26-000044 · wk-form4_1773778200.xml · nonDerivative · entry 3

Maughan David Paul · CIK 0002037895 · Chief Operating Officer, DKC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 114,467

F4 · shares: Shares withheld from issuance to satisfy tax withholding obligation in connection with the vesting of 17,754 shares, which represents 50% of the restricted stock units granted to the Reporting Person on March 15, 2023.

SEC source: 0000927066-26-000044 · wk-form4_1773778200.xml · nonDerivative · entry 2

Maughan David Paul · CIK 0002037895 · Chief Operating Officer, DKC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 122,235

F3 · shares: Shares withheld from issuance to satisfy tax withholding obligation in connection with the vesting of 12,203 shares, which represents 50% of the restricted stock units granted to the Reporting Person on March 15, 2022.

SEC source: 0000927066-26-000044 · wk-form4_1773778200.xml · nonDerivative · entry 1

Maughan David Paul · CIK 0002037895 · Chief Operating Officer, DKC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 127,574

F1 · shares: These restricted stock units are scheduled to vest 50% each on March 15, 2029 and March 15, 2030, respectively, subject to the terms and conditions of the applicable award agreement.

F2 · balance_after: The number of shares reported include shares acquired under DaVita Employee Stock Purchase Plan, an exempt transaction pursuant to Rule 16b-3.

SEC source: 0000927066-26-000043 · wk-form4_1773778192.xml · nonDerivative · entry 1

YALE PHYLLIS R · CIK 0001269070 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,313

SEC source: 0000927066-26-000042 · wk-form4_1773778186.xml · derivative · entry 2

Rodriguez Javier · CIK 0001415548 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,506

Underlying: Common Stock · 56,506 shares

Expires 2031-03-15

F2 · derivative.exercise_date: The stock appreciation rights are scheduled to vest 50% each on March 15, 2029 and March 15, 2030, respectively, subject to the terms and conditions of the applicable award agreement.

SEC source: 0000927066-26-000042 · wk-form4_1773778186.xml · nonDerivative · entry 1

Rodriguez Javier · CIK 0001415548 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 909,815

F1 · shares: These restricted stock units are scheduled to vest 50% each on March 15, 2029 and March 15, 2030, respectively, subject to the terms and conditions of the applicable award agreement.

SEC source: 0000927066-26-000041 · wk-form4_1773778178.xml · nonDerivative · entry 1

Pullin Dennis W · CIK 0001861249 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,421

SEC source: 0000927066-26-000038 · wk-form4_1773778159.xml · derivative · entry 5

ACKERMAN JOEL · CIK 0001220630 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,427

Underlying: Common Stock · 15,427 shares

Expires 2031-03-15

F5 · derivative.exercise_date: The stock appreciation rights are scheduled to vest 50% each on March 15, 2029 and March 15, 2030, respectively, subject to the terms and conditions of the applicable award agreement.

SEC source: 0000927066-26-000038 · wk-form4_1773778159.xml · nonDerivative · entry 4

ACKERMAN JOEL · CIK 0001220630 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 183,905

F4 · shares: Shares withheld from issuance to satisfy tax withholding obligation in connection with the vesting of 11,836 shares, which represents 50% of the restricted stock units granted to the Reporting Person on March 15, 2023.

SEC source: 0000927066-26-000038 · wk-form4_1773778159.xml · nonDerivative · entry 3

ACKERMAN JOEL · CIK 0001220630 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 189,670

F3 · shares: Shares withheld from issuance to satisfy tax withholding obligations in connection with the vesting of 65,997 shares, which represents the shares received upon the satisfaction of performance criteria underlying the award of performance stock units relating to the 2023 - 2025 performance period and granted to the Reporting Person on March 15, 2023.

SEC source: 0000927066-26-000038 · wk-form4_1773778159.xml · nonDerivative · entry 2

ACKERMAN JOEL · CIK 0001220630 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 223,363

F2 · shares: Shares withheld from issuance to satisfy tax withholding obligations in connection with the vesting of 6,585 shares, which represents the shares received upon the satisfaction of performance criteria underlying the award of performance stock units relating to the 2025 performance period and granted to the Reporting Person on March 15, 2022.

SEC source: 0000927066-26-000038 · wk-form4_1773778159.xml · nonDerivative · entry 1

ACKERMAN JOEL · CIK 0001220630 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 226,725

F1 · shares: These restricted stock units are scheduled to vest 50% each on March 15, 2029 and March 15, 2030, respectively, subject to the terms and conditions of the applicable award agreement.

SEC source: 0000927066-26-000040 · wk-form4_1773778172.xml · nonDerivative · entry 1

Hollar Jason M. · CIK 0001687858 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,355

SEC source: 0000927066-26-000039 · wk-form4_1773778166.xml · nonDerivative · entry 1

BERRY CHRISTOPHER MICHAEL · CIK 0001636483 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,640

F1 · shares: These restricted stock units are scheduled to vest 50% each on March 15, 2029 and March 15, 2030, respectively, subject to the terms and conditions of the applicable award agreement.