ANET

SEC source: 0001596532-20-000158 · edgardoc.xml · nonDerivative · entry 1

Brennan Ita M · CIK 0001494211 · Senior Vice President, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,874

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 11, 2020.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $222.33 to $223.25, 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: 0001596532-20-000164 · edgardoc.xml · derivative · entry 28

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,000

Underlying: Common Stock · 10,000 shares

Expires 2021-10-03

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 4, 2020.

F31 · derivative.exercise_date: 1/4th of the 100,000 shares subject to the option vested and became exercisable on September 30, 2013 and 1/48th of the shares subject to the option vested each month thereafter.

SEC source: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 24

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Foundation

Disclosed balance after: 5,935

F19 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on December 12, 2019 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F27 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $230.36 to $230.69 inclusive. The reporting person undertakes to provide 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.

F21 · 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 23

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Foundation

Disclosed balance after: 5,943

F19 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on December 12, 2019 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F21 · 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 22

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Foundation

Disclosed balance after: 5,944

F19 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on December 12, 2019 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F26 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $227.64 to $228.47 inclusive. The reporting person undertakes to provide 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.

F21 · 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 21

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Foundation

Disclosed balance after: 5,967

F19 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on December 12, 2019 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F25 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $226.50 to $226.98 inclusive. The reporting person undertakes to provide 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.

F21 · 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 20

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Foundation

Disclosed balance after: 5,984

F19 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on December 12, 2019 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F24 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $225.40 to $226.39 inclusive. The reporting person undertakes to provide 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.

F21 · 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 19

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Foundation

Disclosed balance after: 6,000

F19 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on December 12, 2019 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F23 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $224.35 to $225.34 inclusive. The reporting person undertakes to provide 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.

F21 · 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 18

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Foundation

Disclosed balance after: 6,045

F19 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on December 12, 2019 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F22 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $223.30 to $224.23 inclusive. The reporting person undertakes to provide 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.

F21 · 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 17

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Foundation

Disclosed balance after: 6,093

F19 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on December 12, 2019 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

F20 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $222.30 to $223.20 inclusive. The reporting person undertakes to provide 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.

F21 · 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 16

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 55,138

F9 · 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 December 9, 2019.

F18 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 230.36 to 230.72 inclusive. The reporting person undertakes to provide 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 in multiple trusts for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 15

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 55,178

F9 · 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 December 9, 2019.

F17 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 228.74 to 228.84 inclusive. The reporting person undertakes to provide 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 in multiple trusts for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 14

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 55,182

F9 · 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 December 9, 2019.

F16 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 227.71 to 228.55 inclusive. The reporting person undertakes to provide 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 in multiple trusts for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 13

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 55,272

F9 · 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 December 9, 2019.

F15 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 226.33 to 227.02 inclusive. The reporting person undertakes to provide 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 in multiple trusts for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 12

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 55,348

F9 · 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 December 9, 2019.

F14 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 225.33 to 226.27 inclusive. The reporting person undertakes to provide 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 in multiple trusts for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 11

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 55,418

F9 · 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 December 9, 2019.

F13 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 224.33 to 225.32 inclusive. The reporting person undertakes to provide 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 in multiple trusts for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 10

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 55,593

F9 · 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 December 9, 2019.

F12 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 223.31 to 224.25 inclusive. The reporting person undertakes to provide 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 in multiple trusts for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 9

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 55,783

F9 · 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 December 9, 2019.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 222.28 to 223.22 inclusive. The reporting person undertakes to provide 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 in multiple trusts for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 8

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,302

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 4, 2020.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $230.36 to $230.7 inclusive. The reporting person undertakes to provide 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 7

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,502

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 4, 2020.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $228.03 to $228.47 inclusive. The reporting person undertakes to provide 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 6

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,902

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 4, 2020.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $226.48 to $226.64 inclusive. The reporting person undertakes to provide 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,302

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 4, 2020.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $225.28 to $226.12 inclusive. The reporting person undertakes to provide 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,802

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 4, 2020.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $224.24 to $225.16 inclusive. The reporting person undertakes to provide 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,418

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 4, 2020.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $223.22 to $224.20 inclusive. The reporting person undertakes to provide 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,918

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 4, 2020.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $222.21 to $223.20 inclusive. The reporting person undertakes to provide 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: 0001596532-20-000164 · edgardoc.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,302

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 4, 2020.

SEC source: 0001596532-20-000159 · edgardoc.xml · nonDerivative · entry 4

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 71,649

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 11, 2020.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $235.02 to $235.54, 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: 0001596532-20-000159 · edgardoc.xml · nonDerivative · entry 3

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 71,849

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 11, 2020.

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

SEC source: 0001596532-20-000159 · edgardoc.xml · nonDerivative · entry 2

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 71,949

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 11, 2020.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $229.96 to $230.76, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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

SEC source: 0001596532-20-000159 · edgardoc.xml · nonDerivative · entry 1

Giancarlo Charles H · CIK 0001299634 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 72,534

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 11, 2020.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $228.90 to $229.84, 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: 0001596532-20-000160 · edgardoc.xml · derivative · entry 7

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,667

Underlying: Common Stock · 1,250 shares

Expires 2027-04-16

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

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 June 10, 2020.

F7 · derivative.exercise_date: 1/5th of the 5,000 shares subject to the option vested and became exercisable on March 20, 2018 and 1/60th of the shares subject to the option shall vest each month thereafter.

SEC source: 0001596532-20-000160 · edgardoc.xml · nonDerivative · entry 6

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 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 June 10, 2020.

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

SEC source: 0001596532-20-000160 · edgardoc.xml · nonDerivative · entry 5

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 100

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 June 10, 2020.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $232.60 to $233.10, 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: 0001596532-20-000160 · edgardoc.xml · nonDerivative · entry 4

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 900

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 June 10, 2020.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $231.47 to $231.83, 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: 0001596532-20-000160 · edgardoc.xml · nonDerivative · entry 3

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 1,598

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 June 10, 2020.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $229.69 to $230.56, 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: 0001596532-20-000160 · edgardoc.xml · nonDerivative · entry 2

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 6,308

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 June 10, 2020.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $228.68 to $229.64, 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.

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

SEC source: 0001596532-20-000160 · edgardoc.xml · nonDerivative · entry 1

McCool John F · CIK 0001701967 · Chief Platform Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 7,808

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 sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2020.

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

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 30

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,219,376

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 June 11, 2020.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $233.80 to $233.82, 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 family trust for which the reporting person is co-trustee.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 29

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,219,424

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 June 11, 2020.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $232.47 to $233.41, 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 family trust for which the reporting person is co-trustee.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 28

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,220,749

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 June 11, 2020.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $231.47 to $232.415, 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 family trust for which the reporting person is co-trustee.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 27

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,221,424

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 June 11, 2020.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $230.43 to $231.365, 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 family trust for which the reporting person is co-trustee.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 26

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,226,516

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 June 11, 2020.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $229.43 to $230.425, 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 family trust for which the reporting person is co-trustee.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 25

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,245,644

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 June 11, 2020.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $228.43 to $229.425, 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 family trust for which the reporting person is co-trustee.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 24

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 668,167

F9 · 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 June 11, 2020.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $234.99 to $235.54, 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 in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 23

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 668,258

F9 · 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 June 11, 2020.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $233.80 to $233.82, 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 in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 22

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 668,288

F9 · 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 June 11, 2020.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $232.47 to $233.41, 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 in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 21

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 669,116

F9 · 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 June 11, 2020.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $231.47 to $232.415, 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 in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 20

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 669,538

F9 · 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 June 11, 2020.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $230.43 to $231.365, 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 in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 19

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 672,720

F9 · 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 June 11, 2020.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $229.43 to $230.425, 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 in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

SEC source: 0001596532-20-000161 · edgardoc.xml · nonDerivative · entry 18

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 684,675

F9 · 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 June 11, 2020.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $228.43 to $229.425, 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 in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.