ANET

SEC source: 0001596532-17-000281 · edgardoc.xml · nonDerivative · entry 2

BECHTOLSHEIM ANDREAS · CIK 0001133206 · Director · Chief Development Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,551

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

SEC source: 0001596532-17-000281 · edgardoc.xml · nonDerivative · entry 1

BECHTOLSHEIM ANDREAS · CIK 0001133206 · Director · Chief Development Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,627

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

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

SEC source: 0001596532-17-000287 · edgardoc.xml · derivative · entry 2

Theodosopoulos Nikos · CIK 0001605860 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,367

Underlying: Common Stock · 437 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2 · derivative.exercise_date: 1/12th of the 5,240 restricted stock units awarded vested on August 21, 2017 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, or November 20 of each year.

F2 · derivative.expiration_date: 1/12th of the 5,240 restricted stock units awarded vested on August 21, 2017 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, or November 20 of each year.

SEC source: 0001596532-17-000287 · edgardoc.xml · nonDerivative · entry 1

Theodosopoulos Nikos · CIK 0001605860 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 873

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

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

SEC source: 0001596532-17-000261 · 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: 2,342,564

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 September 12, 2017.

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

SEC source: 0001596532-17-000261 · 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: 2,342,612

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 September 12, 2017.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $232.075 to $233.02, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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

SEC source: 0001596532-17-000261 · 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: 2,355,088

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 September 12, 2017.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $231.07 to $232.05, 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.

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

SEC source: 0001596532-17-000261 · edgardoc.xml · nonDerivative · entry 12

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,363,637

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 September 12, 2017.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $230.06 to $231.05, 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.

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

SEC source: 0001596532-17-000261 · edgardoc.xml · nonDerivative · entry 11

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,367,470

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $227.66 to $228.21, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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

SEC source: 0001596532-17-000261 · 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: 715,000

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 September 12, 2017.

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: 0001596532-17-000261 · 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: 715,026

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 September 12, 2017.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $232.075 to $233.02, 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: 0001596532-17-000261 · 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: 721,902

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 September 12, 2017.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $231.07 to $232.05, 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: 0001596532-17-000261 · 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: 726,614

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 September 12, 2017.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $230.06 to $231.05, 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: 0001596532-17-000261 · edgardoc.xml · nonDerivative · entry 6

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 728,725

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $227.66 to $228.21, 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: 0001596532-17-000261 · 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: 715,000

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 September 12, 2017.

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: 0001596532-17-000261 · 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: 715,026

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 September 12, 2017.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $232.075 to $233.02, 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: 0001596532-17-000261 · 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: 721,903

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 September 12, 2017.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $231.07 to $232.05, 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: 0001596532-17-000261 · 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: 726,614

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 September 12, 2017.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $230.06 to $231.05, 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: 0001596532-17-000261 · 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: 728,726

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $227.66 to $228.21, 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: 0001596532-17-000259 · edgardoc.xml · nonDerivative · entry 4

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 728,778

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 September 12, 2017.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $228.185 to $228.77, 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: 0001596532-17-000259 · edgardoc.xml · nonDerivative · entry 3

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 730,889

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $227.17 to $228.155, 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: 0001596532-17-000259 · 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: 728,779

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 September 12, 2017.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $228.185 to $228.77, 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: 0001596532-17-000259 · 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: 730,890

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $227.17 to $228.155, 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: 0001596532-17-000259 · edgardoc.xml · nonDerivative · entry 9

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,367,564

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 September 12, 2017.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $226.21 to $227.05, 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.

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

SEC source: 0001596532-17-000259 · 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: 2,371,364

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 September 12, 2017.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $225.21 to $226.195, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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

SEC source: 0001596532-17-000259 · 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: 2,402,741

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 September 12, 2017.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $224.20 to $225.19, 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.

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

SEC source: 0001596532-17-000259 · 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: 2,408,808

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 September 12, 2017.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $223.13 to $224.06, 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.

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

SEC source: 0001596532-17-000259 · 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: 2,412,704

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 September 12, 2017.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $222.11 to $223.08, 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.

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

SEC source: 0001596532-17-000257 · 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: 2,417,564

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 September 12, 2017.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $220.965 to $221.63, 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: 0001596532-17-000257 · 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: 2,448,954

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 September 12, 2017.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $219.965 to $220.96, 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: 0001596532-17-000257 · 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: 2,469,789

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 September 12, 2017.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $218.95 to $219.79, 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: 0001596532-17-000257 · 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: 2,471,579

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 September 12, 2017.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $217.725 to $218.71, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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

SEC source: 0001596532-17-000257 · 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: 2,473,508

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $216.405 to $217.315, 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: 0001596532-17-000257 · 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: 740,000

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 September 12, 2017.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $220.965 to $221.63, 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: 0001596532-17-000257 · 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: 742,730

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 September 12, 2017.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $219.965 to $220.96, 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: 0001596532-17-000257 · 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: 744,541

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 September 12, 2017.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $218.95 to $219.79, 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: 0001596532-17-000257 · 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: 744,696

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 September 12, 2017.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $217.725 to $218.71, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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: 0001596532-17-000257 · edgardoc.xml · nonDerivative · entry 6

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust for Child 2

Disclosed balance after: 744,863

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $216.405 to $217.315, 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: 0001596532-17-000257 · 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: 740,000

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 September 12, 2017.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $220.965 to $221.63, 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: 0001596532-17-000257 · 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: 742,730

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 September 12, 2017.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $219.965 to $220.96, 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: 0001596532-17-000257 · 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: 744,541

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 September 12, 2017.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $218.95 to $219.79, 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: 0001596532-17-000257 · 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: 744,696

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 September 12, 2017.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $217.725 to $218.71, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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: 0001596532-17-000257 · 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: 744,863

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $216.405 to $217.315, 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: 0001596532-17-000257 · edgardoc.xml · nonDerivative · entry 12

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,475,084

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 September 12, 2017.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $216.66 to $217.635, 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: 0001596532-17-000257 · edgardoc.xml · nonDerivative · entry 11

Ullal Jayshree · CIK 0001605809 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · by Trust

Disclosed balance after: 2,477,312

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 September 12, 2017.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $215.66 to $216.645, 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: 0001596532-17-000255 · 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: 2,481,184

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 September 12, 2017.

F12 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $214.99 to $215.90, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F10 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-17-000255 · 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: 2,487,543

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 September 12, 2017.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $213.99 to $214.98, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F10 · ownership.nature: These shares are held by a family trust for which the reporting person is a trustee.

SEC source: 0001596532-17-000254 · edgardoc.xml · derivative · entry 14

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Common Stock · 5,000 shares

Expires 2024-02-10

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 sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on September 12, 2017.

F10 · derivative.exercise_date: 1/5th of the 10,000 shares subject to the option shall vest and become exercisable on May 1, 2016 and 1/60th of the shares subject to the option shall vest monthly thereafter.

SEC source: 0001596532-17-000254 · edgardoc.xml · derivative · entry 13

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,792

Underlying: Common Stock · 1,291 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 exercise and sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on September 12, 2017.

F10 · derivative.exercise_date: 1/5th of the 10,000 shares subject to the option shall vest and become exercisable on May 1, 2016 and 1/60th of the shares subject to the option shall vest monthly thereafter.

SEC source: 0001596532-17-000254 · edgardoc.xml · derivative · entry 12

Taxay Marc · CIK 0001672685 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 208

Underlying: Common Stock · 709 shares

Expires 2023-04-18

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 sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on September 12, 2017.

F9 · derivative.exercise_date: 1/4th of the 10,000 shares subject to the option shall vest and become exercisable on December 1, 2014 and 1/48th of the shares subject to the option shall vest each month thereafter.