ANET

SEC source: 0001596532-26-000045 · edgardoc.xml · nonDerivative · entry 1

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · By GRAT JD

Disclosed balance after: 702,147

F1 · kind: Represents 55,814 shares transferred to the Family Trust from the GRAT of the Reporting Person's spouse.

F2 · ownership.nature: Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts.

SEC source: 0001596532-26-000043 · edgardoc.xml · nonDerivative · entry 3

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 1,784

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 12, 2025.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $129.52 to $130.50, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000043 · edgardoc.xml · nonDerivative · entry 2

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 3,084

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 12, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $128.51 to $129.40, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000043 · edgardoc.xml · nonDerivative · entry 1

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 6,684

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 12, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $127.46 to $128.36, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000041 · edgardoc.xml · nonDerivative · entry 5

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,574

F1 · kind: The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $133.03 to $133.62, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000041 · edgardoc.xml · nonDerivative · entry 4

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,078

F1 · kind: The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $132.03 to $133.00, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000041 · edgardoc.xml · nonDerivative · entry 3

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,913

F1 · kind: The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $131.03 to $132.01, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000041 · edgardoc.xml · nonDerivative · entry 2

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,270

F1 · kind: The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $129.91 to $130.71, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000041 · edgardoc.xml · nonDerivative · entry 1

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,319

F1 · kind: The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $128.82 to $129.76, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000039 · edgardoc.xml · nonDerivative · entry 6

Battles Kelly Bodnar · CIK 0001817763 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,529

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 10, 2025.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $131.46 to $131.50, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000039 · edgardoc.xml · nonDerivative · entry 5

Battles Kelly Bodnar · CIK 0001817763 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,539

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 10, 2025.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $130.31 to $131.00, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000039 · edgardoc.xml · nonDerivative · entry 4

Battles Kelly Bodnar · CIK 0001817763 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,558

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 10, 2025.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $129.29 to $130.26, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000039 · edgardoc.xml · nonDerivative · entry 3

Battles Kelly Bodnar · CIK 0001817763 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,577

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 10, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $128.29 to $129.22, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000039 · edgardoc.xml · nonDerivative · entry 2

Battles Kelly Bodnar · CIK 0001817763 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,711

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 10, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $127.28 to $128.26, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000039 · edgardoc.xml · nonDerivative · entry 1

Battles Kelly Bodnar · CIK 0001817763 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,830

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 10, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.28 to $127.27, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001596532-26-000027 · edgardoc.xml · derivative · entry 11

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 14,400 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F6 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F6 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000027 · edgardoc.xml · derivative · entry 10

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,400

Underlying: Common Stock · 14,400 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F6 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F6 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000027 · edgardoc.xml · derivative · entry 9

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 15,864 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F5 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F5 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000027 · edgardoc.xml · derivative · entry 8

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,864

Underlying: Common Stock · 15,864 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F5 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F5 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000027 · edgardoc.xml · derivative · entry 7

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,250

Underlying: Common Stock · 1,350 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F4 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vest on February 20, 2026 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

F4 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vest on February 20, 2026 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

SEC source: 0001596532-26-000027 · edgardoc.xml · derivative · entry 6

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,340

Underlying: Common Stock · 10,920 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F3 · derivative.exercise_date: Twenty five percent (25%) of the restricted stock units awarded vested on Feb 20, 2025 and will continue to vest at a rate of six and one-quarter percent (6.25%) each quarter on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20 or November 20 of each year.

F3 · derivative.expiration_date: Twenty five percent (25%) of the restricted stock units awarded vested on Feb 20, 2025 and will continue to vest at a rate of six and one-quarter percent (6.25%) each quarter on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20 or November 20 of each year.

SEC source: 0001596532-26-000027 · edgardoc.xml · nonDerivative · entry 5

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,624

F2 · kind: Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.

SEC source: 0001596532-26-000027 · edgardoc.xml · nonDerivative · entry 4

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,929

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

SEC source: 0001596532-26-000027 · edgardoc.xml · nonDerivative · entry 3

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,529

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

SEC source: 0001596532-26-000027 · edgardoc.xml · nonDerivative · entry 2

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,179

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

SEC source: 0001596532-26-000027 · edgardoc.xml · nonDerivative · entry 1

Breithaupt Chantelle Yvette · CIK 0001850596 · Senior Vice President, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 58,315

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 25

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,648

Underlying: Common Stock · 3,880 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F15 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2023 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

F15 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2023 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 24

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 44,240 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F14 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2023 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F14 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2023 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 23

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,240

Underlying: Common Stock · 44,240 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F14 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2023 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F14 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2023 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 22

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 356,688

Underlying: Common Stock · 19,816 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F13 · derivative.exercise_date: Five percent (5%) of the restricted stock awarded vested on November 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

F13 · derivative.expiration_date: Five percent (5%) of the restricted stock awarded vested on November 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 21

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,184

Underlying: Common Stock · 1,836 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F12 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

F12 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 20

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,032

Underlying: Common Stock · 4,148 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F11 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on on February 20, 2024 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

F11 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on on February 20, 2024 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 19

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 14,400 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F10 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2025 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F10 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2025 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 18

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,400

Underlying: Common Stock · 14,400 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F10 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2025 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F10 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2025 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 17

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 19,576 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F9 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F9 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 16

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,576

Underlying: Common Stock · 19,576 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F9 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F9 · derivative.expiration_date: This performance stock award was granted in the first quarter of 2024 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000028 · edgardoc.xml · derivative · entry 15

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,250

Underlying: Common Stock · 1,350 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F8 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2026 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

F8 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2026 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

SEC source: 0001596532-26-000028 · edgardoc.xml · nonDerivative · entry 9

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 89,506

F3 · kind: Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.

F2 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000028 · edgardoc.xml · nonDerivative · entry 8

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 144,329

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000028 · edgardoc.xml · nonDerivative · entry 7

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 124,753

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000028 · edgardoc.xml · nonDerivative · entry 6

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 110,353

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000028 · edgardoc.xml · nonDerivative · entry 5

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 109,003

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000028 · edgardoc.xml · nonDerivative · entry 4

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 89,187

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000028 · edgardoc.xml · nonDerivative · entry 3

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 87,351

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000028 · edgardoc.xml · nonDerivative · entry 2

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 43,111

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000028 · edgardoc.xml · nonDerivative · entry 1

Duda Kenneth · CIK 0001605808 · Director · President and CTO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 38,963

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-26-000029 · edgardoc.xml · derivative · entry 4

Nightingale Todd · CIK 0001944844 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 10,360 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F3 · derivative.exercise_date: This performance stock award was granted in the second quarter of 2025 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F3 · derivative.expiration_date: This performance stock award was granted in the second quarter of 2025 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000029 · edgardoc.xml · derivative · entry 3

Nightingale Todd · CIK 0001944844 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,360

Underlying: Common Stock · 10,360 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F3 · derivative.exercise_date: This performance stock award was granted in the second quarter of 2025 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

F3 · derivative.expiration_date: This performance stock award was granted in the second quarter of 2025 and was earned based on attainment of certain performance conditions. The award vested on February 20, 2026.

SEC source: 0001596532-26-000029 · edgardoc.xml · nonDerivative · entry 2

Nightingale Todd · CIK 0001944844 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,128

F2 · kind: Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.

SEC source: 0001596532-26-000029 · edgardoc.xml · nonDerivative · entry 1

Nightingale Todd · CIK 0001944844 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,360

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.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.