ANET

SEC source: 0001596532-25-000007 · edgardoc.xml · nonDerivative · entry 2

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,430

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 $120.74 to $121.71, 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: 0001596532-25-000007 · edgardoc.xml · nonDerivative · entry 1

Wassenaar Yvonne · CIK 0001707744 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,527

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 $119.74 to $120.73, 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 · balance_after: On December 4, 2024, the issuer completed a four-for-one stock split of the issuer's common stock. ALL AMOUNTS ON THIS FORM HAVE BEEN ADJUSTED TO GIVE EFFECT TO THIS STOCK SPLIT.

SEC source: 0001596532-25-000005 · edgardoc.xml · derivative · entry 14

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 160,000

Underlying: Common Stock · 80,000 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 · 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 14, 2024.

F13 · derivative.exercise_date: 1/5th of the shares subject to the option vested on Dec. 1, 2017 and 1/60th of the shares subject to the option vested each month thereafter provided that the reporting person continue to be a service provider to the Issuer as of each vest date.

F13 · derivative.expiration_date: 1/5th of the shares subject to the option vested on Dec. 1, 2017 and 1/60th of the shares subject to the option vested each month thereafter provided that the reporting person continue to be a service provider to the Issuer as of each vest date.

SEC source: 0001596532-25-000005 · edgardoc.xml · nonDerivative · entry 10

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 666,400

F8 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 14, 2024 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 $119.24 to $119.45, 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.

F9 · 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: 0001596532-25-000005 · edgardoc.xml · nonDerivative · entry 9

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 666,837

F8 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 14, 2024 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 $118.24 to $119.23, 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.

F9 · 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: 0001596532-25-000005 · edgardoc.xml · nonDerivative · entry 8

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 678,454

F8 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 14, 2024 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 $117.24 to $118.23, 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.

F2 · balance_after: On December 4, 2024, the issuer completed a four-for-one stock split of the issuer's common stock. ALL AMOUNTS ON THIS FORM HAVE BEEN ADJUSTED TO GIVE EFFECT TO THIS STOCK SPLIT.

F9 · 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: 0001596532-25-000005 · 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: 1,186,600

F6 · 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 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 $119.24 to $119.45, 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.

F7 · 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: 0001596532-25-000005 · edgardoc.xml · nonDerivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 1,188,349

F6 · 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 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 $118.24 to $119.23, 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.

F7 · 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: 0001596532-25-000005 · edgardoc.xml · nonDerivative · entry 5

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 1,234,816

F6 · 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 14, 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 $117.24 to $118.23, 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.

F2 · balance_after: On December 4, 2024, the issuer completed a four-for-one stock split of the issuer's common stock. ALL AMOUNTS ON THIS FORM HAVE BEEN ADJUSTED TO GIVE EFFECT TO THIS STOCK SPLIT.

F7 · 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: 0001596532-25-000005 · 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: 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 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 $119.24 to $119.45, 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: 0001596532-25-000005 · 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: 15,162

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 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 $118.24 to $119.23, 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: 0001596532-25-000005 · 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: 73,246

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 14, 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 $117.24 to $118.23, 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: 0001596532-25-000005 · 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: 92,976

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 14, 2024.

F2 · balance_after: On December 4, 2024, the issuer completed a four-for-one stock split of the issuer's common stock. ALL AMOUNTS ON THIS FORM HAVE BEEN ADJUSTED TO GIVE EFFECT TO THIS STOCK SPLIT.

SEC source: 0001596532-25-000002 · edgardoc.xml · nonDerivative · entry 5

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 163,784

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

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $113.935 to $113.995, 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.

F4 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-25-000002 · edgardoc.xml · nonDerivative · entry 4

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 163,795

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

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $112.92 to $113.91, 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.

F4 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-25-000002 · edgardoc.xml · nonDerivative · entry 3

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 164,085

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 $111.92 to $112.915, 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.

F4 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-25-000002 · edgardoc.xml · nonDerivative · entry 2

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 166,625

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 $110.91 to $111.905, 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.

F4 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-25-000002 · edgardoc.xml · nonDerivative · entry 1

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 169,691

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 $109.895 to $110.86, 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 · balance_after: On December 4, 2024, the issuer completed a four-for-one stock split of the issuer's common stock. ALL AMOUNTS ON THIS FORM HAVE BEEN ADJUSTED TO GIVE EFFECT TO THIS STOCK SPLIT.

F4 · ownership.nature: These shares are held by a family trust for which the reporting person is co-trustee.

SEC source: 0001596532-24-000412 · edgardoc.xml · nonDerivative · entry 1

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 24,493,968

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

SEC source: 0001596532-24-000410 · edgardoc.xml · nonDerivative · entry 1

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 0

F1 · 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 September 8, 2023.

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

SEC source: 0001596532-24-000408 · edgardoc.xml · derivative · entry 23

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 240,000

Underlying: Common Stock · 80,000 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 · 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 14, 2024.

F15 · derivative.exercise_date: 1/5th of the shares subject to the option vested on Dec. 1, 2017 and 1/60th of the shares subject to the option vested each month thereafter provided that the reporting person continue to be a service provider to the Issuer as of each vest date.

F15 · derivative.expiration_date: 1/5th of the shares subject to the option vested on Dec. 1, 2017 and 1/60th of the shares subject to the option vested each month thereafter provided that the reporting person continue to be a service provider to the Issuer as of each vest date.

SEC source: 0001596532-24-000408 · edgardoc.xml · nonDerivative · entry 19

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 682,400

F10 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 14, 2024 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.57 to $110.74, 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.

F11 · 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: 0001596532-24-000408 · edgardoc.xml · nonDerivative · entry 18

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 682,477

F10 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 14, 2024 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 $109.51 to $110.50, 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.

F11 · 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: 0001596532-24-000408 · edgardoc.xml · nonDerivative · entry 17

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Foundation

Disclosed balance after: 684,223

F10 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 14, 2024 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 $108.50 to $109.45, 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.

F11 · 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: 0001596532-24-000408 · 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: 689,818

F10 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 14, 2024 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 $107.50 to $108.495, 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.

F11 · 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: 0001596532-24-000408 · 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: 694,779

F10 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 14, 2024 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 $106.50 to $107.49, 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.

F11 · 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: 0001596532-24-000408 · 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: 697,429

F10 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 14, 2024 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 $105.49 to $106.44, 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.

F11 · 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: 0001596532-24-000408 · edgardoc.xml · nonDerivative · entry 13

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 1,250,600

F8 · 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 14, 2024.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.57 to $110.74, 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.

F9 · 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: 0001596532-24-000408 · edgardoc.xml · nonDerivative · entry 12

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 1,250,908

F8 · 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 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 $109.51 to $110.50, 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.

F9 · 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: 0001596532-24-000408 · 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: 1,257,891

F8 · 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 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 $108.50 to $109.45, 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.

F9 · 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: 0001596532-24-000408 · 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: 1,280,273

F8 · 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 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 $107.50 to $108.495, 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.

F9 · 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: 0001596532-24-000408 · 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: 1,300,115

F8 · 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 14, 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 $106.50 to $107.49, 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.

F9 · 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: 0001596532-24-000408 · 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: 1,310,715

F8 · 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 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 $105.49 to $106.44, 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.

F9 · 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: 0001596532-24-000408 · edgardoc.xml · nonDerivative · entry 7

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 14, 2024.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.57 to $110.74, 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: 0001596532-24-000408 · 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: 13,362

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 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 $109.51 to $110.50, 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: 0001596532-24-000408 · 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: 22,091

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 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 $108.50 to $109.45, 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: 0001596532-24-000408 · 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: 50,068

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 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 $107.50 to $108.495, 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: 0001596532-24-000408 · 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: 74,871

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 14, 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 $106.50 to $107.49, 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: 0001596532-24-000408 · 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: 88,121

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 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 $105.49 to $106.44, 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: 0001596532-24-000408 · 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: 92,976

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 14, 2024.

SEC source: 0001596532-24-000405 · edgardoc.xml · nonDerivative · entry 9

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 42,946

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

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $415.78 to $416.73, 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.

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

SEC source: 0001596532-24-000405 · edgardoc.xml · nonDerivative · entry 8

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 43,051

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

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $414.74 to $415.35, 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.

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

SEC source: 0001596532-24-000405 · edgardoc.xml · nonDerivative · entry 7

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 43,262

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

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $413.74 to $414.72, 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.

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

SEC source: 0001596532-24-000405 · edgardoc.xml · nonDerivative · entry 6

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 43,667

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

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $412.74 to $413.67, 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.

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

SEC source: 0001596532-24-000405 · edgardoc.xml · nonDerivative · entry 5

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 44,058

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 $411.74 to $412.73, 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.

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

SEC source: 0001596532-24-000405 · edgardoc.xml · nonDerivative · entry 4

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 44,379

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 $410.74 to $411.73, 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.

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

SEC source: 0001596532-24-000405 · edgardoc.xml · nonDerivative · entry 3

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 44,610

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 $409.72 to $410.71, 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.

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

SEC source: 0001596532-24-000405 · edgardoc.xml · nonDerivative · entry 2

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 44,816

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 14, 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 $407.15 to $407.94, 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.

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

SEC source: 0001596532-24-000405 · edgardoc.xml · nonDerivative · entry 1

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · by Trust

Disclosed balance after: 44,911

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

SEC source: 0001596532-24-000406 · edgardoc.xml · nonDerivative · entry 8

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

F1 · kind: The exercise and sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on September 14, 2023.