ANET

SEC source: 0001596532-21-000076 · edgardoc.xml · derivative · entry 3

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,097

Underlying: Common Stock · 219 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: The reporting person was granted 2,633 RSU's on May 28, 2019. 1/12th of the shares vested on August 20, 2019 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, or November 20 of each year.

F3 · derivative.expiration_date: The reporting person was granted 2,633 RSU's on May 28, 2019. 1/12th of the shares vested on August 20, 2019 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, or November 20 of each year.

SEC source: 0001596532-21-000076 · edgardoc.xml · nonDerivative · entry 1

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,536

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: 0001596532-21-000078 · edgardoc.xml · derivative · entry 12

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,375

Underlying: Common Stock · 312 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: Six and one-quarter percent (6.25%) of the 5,000 restricted stock units awarded vested on November 20, 2020 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.

F10 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 5,000 restricted stock units awarded vested on November 20, 2020 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: 0001596532-21-000078 · edgardoc.xml · derivative · entry 11

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,625

Underlying: Common Stock · 187 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: Six and one-quarter percent (6.25%) of the 3,000 restricted stock units awarded vested on November 20, 2020 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.

F9 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 3,000 restricted stock units awarded vested on November 20, 2020 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: 0001596532-21-000078 · edgardoc.xml · derivative · entry 10

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,000

Underlying: Common Stock · 250 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 4,000 restricted stock units awarded vested on May 20, 2019 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, or November 20 of each year.

F8 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 4,000 restricted stock units awarded vested on May 20, 2019 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, or November 20 of each year.

SEC source: 0001596532-21-000078 · edgardoc.xml · derivative · entry 9

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,250

Underlying: Common Stock · 2,250 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.

F7 · derivative.exercise_date: 1/5th of the 45,000 restricted stock unit award vested on May 20, 2018 and 1/20th of the award will vest 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.

F7 · derivative.expiration_date: 1/5th of the 45,000 restricted stock unit award vested on May 20, 2018 and 1/20th of the award will vest 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: 0001596532-21-000078 · edgardoc.xml · derivative · entry 8

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,083

Underlying: Common Stock · 84 shares

Expires 2027-04-16

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.

F5 · kind: The exercise and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2020.

F6 · derivative.exercise_date: 1/5th of the 5,000 shares subject to the option vested and became exercisable on March 20, 2018 and 1/60th of the shares subject to the option shall vest each month thereafter.

SEC source: 0001596532-21-000078 · edgardoc.xml · nonDerivative · entry 7

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,038

F5 · kind: The exercise and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2020.

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

SEC source: 0001596532-21-000078 · edgardoc.xml · nonDerivative · entry 6

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,122

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.

F5 · kind: The exercise and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2020.

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

SEC source: 0001596532-21-000078 · edgardoc.xml · nonDerivative · entry 5

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,038

F4 · kind: Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.

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

SEC source: 0001596532-21-000078 · edgardoc.xml · nonDerivative · entry 4

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 3,081

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.

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

SEC source: 0001596532-21-000078 · edgardoc.xml · nonDerivative · entry 3

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,769

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.

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

SEC source: 0001596532-21-000078 · edgardoc.xml · nonDerivative · entry 2

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,582

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.

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

SEC source: 0001596532-21-000078 · edgardoc.xml · nonDerivative · entry 1

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,332

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 · balance_after: Includes 41 shares acquired under the Arista Networks, Inc. 2014 Employee Stock Purchase Plan on February 16, 2021.

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

SEC source: 0001596532-21-000079 · edgardoc.xml · derivative · entry 13

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 500 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: Six and one-quarter percent (6.25%) of the 8,000 restricted stock units awarded vested on November 20, 2020 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.

F9 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 8,000 restricted stock units awarded vested on November 20, 2020 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: 0001596532-21-000079 · edgardoc.xml · derivative · entry 12

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,200

Underlying: Common Stock · 600 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: Five percent (5%) of the 12,000 restricted stock units awarded Vested on May 20, 2019 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: Five percent (5%) of the 12,000 restricted stock units awarded Vested on May 20, 2019 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: 0001596532-21-000079 · edgardoc.xml · derivative · entry 11

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,250

Underlying: Common Stock · 375 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.

F7 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the 6,000 restricted stock units awarded vested on November 20, 2020 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, or November 20.

F7 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 6,000 restricted stock units awarded vested on November 20, 2020 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, or November 20.

SEC source: 0001596532-21-000079 · edgardoc.xml · derivative · entry 10

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,500

Underlying: Common Stock · 437 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: Six and one-quarter percent (6.25%) of the 7,000 restricted stock units awarded vested on May 20, 2019 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, or November 20.

F6 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 7,000 restricted stock units awarded vested on May 20, 2019 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, or November 20.

SEC source: 0001596532-21-000079 · edgardoc.xml · derivative · entry 9

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 1,000 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: Five percent (5%) of the 20,000 restricted stock units awarded vested on February 20, 2018 and five percent (5%) of the award will continue to vest 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.

F5 · derivative.expiration_date: Five percent (5%) of the 20,000 restricted stock units awarded vested on February 20, 2018 and five percent (5%) of the award will continue to vest 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: 0001596532-21-000079 · edgardoc.xml · derivative · entry 8

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,250

Underlying: Common Stock · 750 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: Five percent (5%) of the 15,000 restricted stock units awarded vested on February 20, 2017 and five percent (5%) of the award will continue to vest 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.

F4 · derivative.expiration_date: Five percent (5%) of the 15,000 restricted stock units awarded vested on February 20, 2017 and five percent (5%) of the award will continue to vest 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: 0001596532-21-000079 · edgardoc.xml · nonDerivative · entry 7

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,503

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

SEC source: 0001596532-21-000079 · edgardoc.xml · nonDerivative · entry 6

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,320

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: 0001596532-21-000079 · edgardoc.xml · nonDerivative · entry 5

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,820

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: 0001596532-21-000079 · edgardoc.xml · nonDerivative · entry 4

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,220

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: 0001596532-21-000079 · edgardoc.xml · nonDerivative · entry 3

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,845

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: 0001596532-21-000079 · edgardoc.xml · nonDerivative · entry 2

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,408

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: 0001596532-21-000079 · edgardoc.xml · nonDerivative · entry 1

Sadana Anshul · CIK 0001605807 · SVP, Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,408

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 · balance_after: Includes 82 shares acquired under the Arista Networks, Inc. 2014 Employee Stock Purchase Plan on February 16, 2021.

SEC source: 0001596532-21-000080 · edgardoc.xml · derivative · entry 2

Scheinman Daniel · CIK 0001605698 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,097

Underlying: Common Stock · 219 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.

F2 · derivative.exercise_date: The reporting person was granted 2,633 RSU's on May 28, 2019. 1/12th of the shares vested on August 20, 2019 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, or November 20 of each year.

F2 · derivative.expiration_date: The reporting person was granted 2,633 RSU's on May 28, 2019. 1/12th of the shares vested on August 20, 2019 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, or November 20 of each year.

SEC source: 0001596532-21-000080 · edgardoc.xml · nonDerivative · entry 1

Scheinman Daniel · CIK 0001605698 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,703

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: 0001596532-21-000081 · edgardoc.xml · derivative · entry 11

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,469

Underlying: Common Stock · 390 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.

F7 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the 6,250 restricted stock units awarded vested on November 20, 2020 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.

F7 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 6,250 restricted stock units awarded vested on November 20, 2020 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: 0001596532-21-000081 · edgardoc.xml · derivative · entry 10

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,062

Underlying: Common Stock · 219 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: Six and one-quarter percent (6.25%) of the 3,500 restricted stock units awarded vested on November 20, 2020 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.

F6 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 3,500 restricted stock units awarded vested on November 20, 2020 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: 0001596532-21-000081 · edgardoc.xml · derivative · entry 9

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,500

Underlying: Common Stock · 312 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: Six and one-quarter percent (6.25%) of the 5,000 restricted stock units awarded vested on May 20, 2019 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.

F5 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 5,000 restricted stock units awarded vested on May 20, 2019 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: 0001596532-21-000081 · edgardoc.xml · derivative · entry 8

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,200

Underlying: Common Stock · 600 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: Five percent (5%) of the 12,000 restricted stock units awarded vested on February 20, 2018 and five percent (5%) of the award will continue to vest 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.

F4 · derivative.expiration_date: Five percent (5%) of the 12,000 restricted stock units awarded vested on February 20, 2018 and five percent (5%) of the award will continue to vest 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: 0001596532-21-000081 · edgardoc.xml · derivative · entry 7

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 600 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: Five percent (5%) of the 12,000 restricted stock units awarded vested on May 20, 2016 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 or November 20 of each year.

F3 · derivative.expiration_date: Five percent (5%) of the 12,000 restricted stock units awarded vested on May 20, 2016 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 or November 20 of each year.

SEC source: 0001596532-21-000081 · edgardoc.xml · nonDerivative · entry 6

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,326

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

SEC source: 0001596532-21-000081 · edgardoc.xml · nonDerivative · entry 5

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,121

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: 0001596532-21-000081 · edgardoc.xml · nonDerivative · entry 4

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,731

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: 0001596532-21-000081 · edgardoc.xml · nonDerivative · entry 3

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,512

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: 0001596532-21-000081 · edgardoc.xml · nonDerivative · entry 2

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,200

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: 0001596532-21-000081 · edgardoc.xml · nonDerivative · entry 1

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 600

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: 0001596532-21-000082 · edgardoc.xml · derivative · entry 2

TEMPLETON MARK B · CIK 0001201938 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 261

Underlying: Common Stock · 262 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.

F2 · derivative.exercise_date: The reporting person was granted 1,046 RSU's on May 27, 2020. 1/4th of the shares vested on August 20, 2020 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted 1,046 RSU's on May 27, 2020. 1/4th of the shares vested on August 20, 2020 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, or November 20.

SEC source: 0001596532-21-000082 · edgardoc.xml · nonDerivative · entry 1

TEMPLETON MARK B · CIK 0001201938 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,025

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: 0001596532-21-000083 · edgardoc.xml · derivative · entry 2

Theodosopoulos Nikos · CIK 0001605860 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 261

Underlying: Common Stock · 262 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.

F2 · derivative.exercise_date: The reporting person was granted 1,046 RSU's on May 27, 2020. 1/4th of the shares vested on August 20, 2020 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted 1,046 RSU's on May 27, 2020. 1/4th of the shares vested on August 20, 2020 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, or November 20.

SEC source: 0001596532-21-000083 · edgardoc.xml · nonDerivative · entry 1

Theodosopoulos Nikos · CIK 0001605860 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,035

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: 0001596532-21-000084 · edgardoc.xml · derivative · entry 13

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,133

Underlying: Common Stock · 1,045 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: This performance stock award was granted in the first quarter of 2020 and was earned based on attainment of certain performance conditions. The award vested (25%) on February 22, 2021, and will continue to vest at a rate of 6.25% quarterly 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: This performance stock award was granted in the first quarter of 2020 and was earned based on attainment of certain performance conditions. The award vested (25%) on February 22, 2021, and will continue to vest at a rate of 6.25% quarterly 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: 0001596532-21-000084 · edgardoc.xml · derivative · entry 12

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,178

Underlying: Common Stock · 4,178 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.

F8 · derivative.exercise_date: This performance stock award was granted in the first quarter of 2020 and was earned based on attainment of certain performance conditions. The award vested (25%) on February 22, 2021, and will continue to vest at a rate of 6.25% quarterly 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: This performance stock award was granted in the first quarter of 2020 and was earned based on attainment of certain performance conditions. The award vested (25%) on February 22, 2021, and will continue to vest at a rate of 6.25% quarterly 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: 0001596532-21-000084 · edgardoc.xml · derivative · entry 11

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 1,250 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.

F7 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the 20,000 restricted stock units awarded vested on May 20, 2019 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.

F7 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the 20,000 restricted stock units awarded vested on May 20, 2019 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: 0001596532-21-000084 · edgardoc.xml · derivative · entry 10

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,188

Underlying: Common Stock · 2,062 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: Five percent (5%) of the 41,250 restricted stock units awarded vested on February 20, 2017 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, or November 20 of each year.

F6 · derivative.expiration_date: Five percent (5%) of the 41,250 restricted stock units awarded vested on February 20, 2017 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, or November 20 of each year.

SEC source: 0001596532-21-000084 · edgardoc.xml · nonDerivative · entry 4

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,629

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

SEC source: 0001596532-21-000084 · edgardoc.xml · nonDerivative · entry 3

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,791

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.