ANET

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 16

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 592,400

F9 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 13, 2025 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $94.1794 to $94.64, 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.

F10 · ownership.nature: These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 15

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 593,128

F9 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 13, 2025 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $93.17 to $94.16, 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.

F10 · ownership.nature: These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 14

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 595,564

F9 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 13, 2025 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $92.17 to $93.16, 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.

F10 · ownership.nature: These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 13

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 596,812

F9 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 13, 2025 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $91.17 to $92.16, 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.

F10 · ownership.nature: These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 12

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 599,717

F9 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 13, 2025 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.01 to $90.99, 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.

F10 · ownership.nature: These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 11

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 1,239,168

F7 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's children on March 13, 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 $94.1794 to $94.64, 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.

F8 · ownership.nature: These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 10

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 1,240,331

F7 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's children on March 13, 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 $93.17 to $94.16, 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.

F8 · ownership.nature: These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 9

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 1,244,229

F7 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's children on March 13, 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 $92.17 to $93.16, 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.

F8 · ownership.nature: These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 8

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 1,246,226

F7 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's children on March 13, 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 $91.17 to $92.16, 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.

F8 · ownership.nature: These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 7

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 1,250,875

F7 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's children on March 13, 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 $90.01 to $90.99, 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.

F8 · ownership.nature: These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 6

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,976

F1 · kind: The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 13, 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 $94.1794 to $94.64, 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: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 5

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,158

F1 · kind: The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 13, 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 $93.17 to $94.16, 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: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 4

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 22,467

F1 · kind: The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 13, 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 $92.17 to $93.16, 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: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 3

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,210

F1 · kind: The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 13, 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 $91.17 to $92.16, 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: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 2

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 34,926

F1 · kind: The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 13, 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 $90.01 to $90.99, 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: 0001596532-25-000172 · edgardoc.xml · nonDerivative · entry 1

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,976

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 · kind: The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 13, 2025.

SEC source: 0001596532-25-000165 · edgardoc.xml · nonDerivative · entry 3

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 25,615

F5 · kind: Represents an aggregate of 300,000 shares contributed to the GRAT of the Reporting Person (150,000 shares), and GRAT of the Reporting Person's spouse (150,000 shares)

F6 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-25-000165 · edgardoc.xml · nonDerivative · entry 2

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Indirect · By GRAT KD

Disclosed balance after: 750,000

F3 · kind: Represents 150,000 shares transferred from the Family Trust to the GRAT of the Reporting Person.

F4 · ownership.nature: Reporting person is the trustee of the Kenneth Duda Annuity Trusts.

SEC source: 0001596532-25-000165 · edgardoc.xml · nonDerivative · entry 1

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Indirect · By GRAT JD

Disclosed balance after: 750,000

F1 · kind: Represents 150,000 shares transferred from the Family Trust to the GRAT of the Reporting Persons spouse.

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

SEC source: 0001596532-25-000166 · edgardoc.xml · nonDerivative · entry 2

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 73,784

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

SEC source: 0001596532-25-000166 · edgardoc.xml · nonDerivative · entry 1

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Charitable Trust

Disclosed balance after: 50,000

F1 · ownership.nature: These shares are held by a Charitable Remainder Trust for which the reporting person is co-trustee.

SEC source: 0001596532-25-000162 · edgardoc.xml · nonDerivative · entry 4

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 123,784

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 14, 2024.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.30 to $89.53, 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: 0001596532-25-000162 · edgardoc.xml · nonDerivative · entry 3

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 124,962

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 14, 2024.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.27 to $89.245, 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: 0001596532-25-000162 · edgardoc.xml · nonDerivative · entry 2

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 127,596

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 14, 2024.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.28 to $89.05, 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: 0001596532-25-000162 · edgardoc.xml · nonDerivative · entry 1

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 130,484

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 14, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.25 to $87.195, 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: 0001596532-25-000155 · edgardoc.xml · derivative · entry 1

Battles Kelly Bodnar · CIK 0001817763 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,884

Underlying: Common Stock · 3,884 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.

F2 · derivative.exercise_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

SEC source: 0001596532-25-000156 · edgardoc.xml · derivative · entry 1

CHEW LEWIS · CIK 0001224994 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,884

Underlying: Common Stock · 3,884 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.

F2 · derivative.exercise_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

SEC source: 0001596532-25-000157 · edgardoc.xml · derivative · entry 1

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,884

Underlying: Common Stock · 3,884 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.

F2 · derivative.exercise_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

SEC source: 0001596532-25-000158 · edgardoc.xml · derivative · entry 1

Scheinman Daniel · CIK 0001605698 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,884

Underlying: Common Stock · 3,884 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.

F2 · derivative.exercise_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

SEC source: 0001596532-25-000159 · edgardoc.xml · derivative · entry 1

TEMPLETON MARK B · CIK 0001201938 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,884

Underlying: Common Stock · 3,884 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.

F2 · derivative.exercise_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

SEC source: 0001596532-25-000160 · edgardoc.xml · derivative · entry 1

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,884

Underlying: Common Stock · 3,884 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.

F2 · derivative.exercise_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.

SEC source: 0001596532-25-000140 · edgardoc.xml · nonDerivative · entry 4

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,476

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 September 13, 2024.

SEC source: 0001596532-25-000140 · edgardoc.xml · nonDerivative · entry 3

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,478

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 September 13, 2024.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $94.33 to $95.32, 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: 0001596532-25-000140 · edgardoc.xml · nonDerivative · entry 2

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,565

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 September 13, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $93.33 to $94.28, 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: 0001596532-25-000140 · edgardoc.xml · nonDerivative · entry 1

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,620

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 September 13, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $92.29 to $93.26, 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: 0001596532-25-000128 · edgardoc.xml · derivative · entry 2

Battles Kelly Bodnar · CIK 0001817763 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 844 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 RSUs on June 7, 2024. 1/4th of the shares vest on August 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted RSUs on June 7, 2024. 1/4th of the shares vest on August 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, or November 20.

SEC source: 0001596532-25-000128 · edgardoc.xml · nonDerivative · entry 1

Battles Kelly Bodnar · CIK 0001817763 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,324

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: 0001596532-25-000129 · edgardoc.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 120,096

Underlying: Common Stock · 10,916 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.

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: 0001596532-25-000129 · 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: 36,471

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

SEC source: 0001596532-25-000129 · 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: 41,949

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: 0001596532-25-000130 · edgardoc.xml · derivative · entry 2

CHEW LEWIS · CIK 0001224994 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 844 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 RSUs on June 7, 2024. 1/4th of the shares vest on August 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, or November 20.

F2 · derivative.expiration_date: The reporting person was granted RSUs on June 7, 2024. 1/4th of the shares vest on August 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, or November 20.

SEC source: 0001596532-25-000130 · edgardoc.xml · nonDerivative · entry 1

CHEW LEWIS · CIK 0001224994 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,348

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: 0001596532-25-000131 · edgardoc.xml · derivative · entry 14

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,296

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.

F11 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded will vest 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.

F11 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded will vest 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: 0001596532-25-000131 · edgardoc.xml · derivative · entry 13

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,424

Underlying: Common Stock · 5,712 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 restricted stock units awarded will vest on February 20, 2022 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 restricted stock units awarded will vest on February 20, 2022 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: 0001596532-25-000131 · edgardoc.xml · derivative · entry 12

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,688

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.

F9 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the restricted stock 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.

F9 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the restricted stock 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: 0001596532-25-000131 · edgardoc.xml · derivative · entry 11

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,476

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.

F8 · derivative.exercise_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded will vest 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.

F8 · derivative.expiration_date: Six and one-quarter percent (6.25%) of the restricted stock units awarded will vest 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: 0001596532-25-000131 · edgardoc.xml · nonDerivative · entry 5

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 325,615

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: 0001596532-25-000131 · edgardoc.xml · nonDerivative · entry 4

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 333,433

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: 0001596532-25-000131 · edgardoc.xml · nonDerivative · entry 3

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 331,597

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: 0001596532-25-000131 · edgardoc.xml · nonDerivative · entry 2

Duda Kenneth · CIK 0001605808 · Director · CTO and SVP Software Eng.

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 327,449

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.