ANET

SEC source: 0001596532-19-000073 · edgardoc.xml · nonDerivative · entry 8

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,282,702

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 December 14, 2018.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $298.99 to $299.97, 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 a trustee.

SEC source: 0001596532-19-000073 · edgardoc.xml · nonDerivative · entry 7

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,293,278

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 December 14, 2018.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $297.98 to $298.95, 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 a trustee.

SEC source: 0001596532-19-000073 · edgardoc.xml · nonDerivative · entry 6

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,295,478

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 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 December 14, 2018.

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

SEC source: 0001596532-19-000073 · edgardoc.xml · nonDerivative · entry 5

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,287,228

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 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 December 14, 2018.

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

SEC source: 0001596532-19-000076 · edgardoc.xml · nonDerivative · entry 1

Rivelo Manuel Felix · CIK 0001431315 · SVP, Chief Customer Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 270

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 14, 2018.

SEC source: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 12

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 701,000

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $292.73 to $293.22, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: These shares are held in a 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: 0001596532-19-000073 · edgardoc.xml · derivative · entry 20

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,371

Underlying: Common Stock · 4,296 shares

Expires 2026-02-11

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 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 December 14, 2018.

F15 · derivative.exercise_date: 1/60th of the 100,000 shares subject to the option vested on January 1, 2017 and 1/60th of the shares subject to the option shall vest monthly thereafter.

SEC source: 0001596532-19-000073 · edgardoc.xml · derivative · entry 19

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,000

Underlying: Common Stock · 2,333 shares

Expires 2024-01-12

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 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 December 14, 2018.

F14 · derivative.exercise_date: 1/5th of the 20,000 shares subject to the option vested and became exercisable on December 1, 2017 and 1/60th of the shares subject to the option shall vest monthly thereafter.

SEC source: 0001596532-19-000073 · edgardoc.xml · nonDerivative · entry 4

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,279,857

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 December 14, 2018.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $299.01 to $299.54, 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.

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

SEC source: 0001596532-19-000073 · edgardoc.xml · nonDerivative · entry 3

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,281,057

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 December 14, 2018.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $297.985 to $298.95, 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 a trustee.

SEC source: 0001596532-19-000073 · edgardoc.xml · nonDerivative · entry 2

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,288,193

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 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 December 14, 2018.

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

SEC source: 0001596532-19-000073 · edgardoc.xml · nonDerivative · entry 1

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,283,897

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 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 December 14, 2018.

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

SEC source: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 18

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,281,564

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $294.99 to $295.05, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F9 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 17

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,281,651

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $293.86 to $294.81, 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 family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 16

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,281,919

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $292.73 to $293.22, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F9 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 15

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,282,224

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $291.68 to $292.60, 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 family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 14

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,282,468

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $290.48 to $291.39, 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 family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 13

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,282,602

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.96 to $288.46, 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 family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 11

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 701,198

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $294.99 to $295.05, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: These shares are held in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 10

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 701,254

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $293.86 to $294.81, 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 in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 9

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 701,427

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $291.68 to $292.60, 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 in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 8

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 701,585

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $290.48 to $291.39, 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 in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 7

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 701,672

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.96 to $288.46, 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 in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 6

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 1

Disclosed balance after: 701,000

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $294.99 to $295.05, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: These shares are held in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 5

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 1

Disclosed balance after: 701,057

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $293.86 to $294.81, 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 in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 4

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 1

Disclosed balance after: 701,230

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $292.73 to $293.22, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: These shares are held in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 3

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 1

Disclosed balance after: 701,427

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $291.68 to $292.60, 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 in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 2

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 1

Disclosed balance after: 701,586

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $290.48 to $291.39, 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 in a 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: 0001596532-19-000071 · edgardoc.xml · nonDerivative · entry 1

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 1

Disclosed balance after: 701,672

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.96 to $288.46, 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 in a 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: 0001596532-19-000077 · edgardoc.xml · nonDerivative · entry 1

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 701,000

F1 · date: This form is being amended to correct the transaction date previously filed as 3/15/2019.

F2 · 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 December 14, 2018.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $298.99 to $299.97, 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 in a 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: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 12

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

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 393,355

F7 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 11

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

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 393,527

F5 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 2, 2018.

F12 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $282.60 to $283.45, 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.

F7 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 10

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

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 394,427

F5 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 2, 2018.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $281.56 to $282.54, 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.

F7 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 9

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

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 399,215

F5 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 2, 2018.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $280.55 to $281.52, 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.

F7 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 8

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

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 400,915

F5 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 2, 2018.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $279.10 to $280.03, 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.

F7 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 7

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

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 402,515

F5 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 2, 2018.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $278.00 to $278.97, 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.

F7 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 6

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

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 404,027

F5 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 2, 2018.

F7 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 404,127

F5 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 2, 2018.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.23 to $276.11, 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.

F7 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 69,768

F2 · 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: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 69,596

F1 · 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 persons children on December 12, 2018.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $282.26 to $282.82, 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.

F2 · 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: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 69,870

F1 · 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 persons children on December 12, 2018.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $278.41 to $278.42, 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.

F2 · 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: 0001596532-19-000069 · edgardoc.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Childrens' Trust

Disclosed balance after: 70,270

F1 · 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 persons children on December 12, 2018.

F2 · 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: 0001596532-19-000065 · edgardoc.xml · nonDerivative · entry 21

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,282,654

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $289.085 to $289.70, 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 family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000065 · edgardoc.xml · nonDerivative · entry 20

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,282,886

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.99 to $288.57, 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 family trust for which the reporting person is a trustee.

SEC source: 0001596532-19-000065 · edgardoc.xml · nonDerivative · entry 14

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 701,706

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $289.085 to $289.70, 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 in a 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: 0001596532-19-000065 · edgardoc.xml · nonDerivative · entry 13

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 701,842

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.99 to $288.57, 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 in a 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: 0001596532-19-000065 · edgardoc.xml · nonDerivative · entry 7

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 1

Disclosed balance after: 701,706

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $289.085 to $289.70, 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 in a 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: 0001596532-19-000065 · edgardoc.xml · nonDerivative · entry 6

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 1

Disclosed balance after: 701,842

F1 · kind: The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 14, 2018.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.99 to $288.57, 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 in a 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: 0001596532-19-000063 · edgardoc.xml · derivative · entry 17

Sadana Anshul · CIK 0001605807 · Chief Customer Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,500

Underlying: Common Stock · 5,833 shares

Expires 2024-12-15

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 December 12, 2018.

F12 · derivative.exercise_date: 1/5th of the 50,000 shares subject to the option vested and became exercisable on December 1, 2017 and 1/60th of the shares subject to the option shall vest monthly thereafter.

SEC source: 0001596532-19-000063 · edgardoc.xml · derivative · entry 16

Sadana Anshul · CIK 0001605807 · Chief Customer Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,000

Underlying: Common Stock · 2,333 shares

Expires 2025-09-10

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 December 12, 2018.

F11 · derivative.exercise_date: 1/5th of the 20,000 shares subject to the option vested and became exercisable on December 1, 2017 and 1/60th of the shares subject to the option shall vest monthly thereafter.