=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-05-20
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: Arista Networks, Inc. (ANET)
CIK: 0001596532
--- Reporting Owner ---
Name: Duda Kenneth
CIK: 0001605808
Role: Director, Officer (President and CTO)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: +3,884 | Price: $0.00
Shares Owned After: 205,018 | Ownership: I (Indirect) | Nature: by Trust
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F2] These shares are held by a family trust for which the reporting person is co-trustee.
[Transaction #2]
Security: Common Stock
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: +4,148 | Price: $0.00
Shares Owned After: 209,166 | Ownership: I (Indirect) | Nature: by Trust
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F2] These shares are held by a family trust for which the reporting person is co-trustee.
[Transaction #3]
Security: Common Stock
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: +1,836 | Price: $0.00
Shares Owned After: 211,002 | Ownership: I (Indirect) | Nature: by Trust
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F2] These shares are held by a family trust for which the reporting person is co-trustee.
[Transaction #4]
Security: Common Stock
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: +19,816 | Price: $0.00
Shares Owned After: 230,818 | Ownership: I (Indirect) | Nature: by Trust
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F2] These shares are held by a family trust for which the reporting person is co-trustee.
[Transaction #5]
Security: Common Stock
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: +1,350 | Price: $0.00
Shares Owned After: 232,168 | Ownership: I (Indirect) | Nature: by Trust
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F2] These shares are held by a family trust for which the reporting person is co-trustee.
[Transaction #6]
Security: Common Stock
Date: 2026-05-20 | Code: F (Payment of exercise/tax)
Shares: -15,545 | Price: $141.58
Total Value: $2,200,861.10
Shares Owned After: 216,623 | Ownership: I (Indirect) | Nature: by Trust
Footnotes:
[F3] Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.
[F2] These shares are held by a family trust for which the reporting person is co-trustee.
--- Derivative Transactions ---
[Transaction #1]
Security: Restricted Stock Unit - 17
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: -1,350 | Price: $0.00
Shares Owned After: 18,900 | Ownership: D (Direct)
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F8] Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2026 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
[F8] Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2026 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
[Transaction #2]
Security: Restricted Stock Unit-11
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: -4,148 | Price: $0.00
Shares Owned After: 24,884 | Ownership: D (Direct)
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F9] Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on on February 20, 2024 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
[F9] Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on on February 20, 2024 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
[Transaction #3]
Security: Restricted Stock Unit-13
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: -1,836 | Price: $0.00
Shares Owned After: 18,348 | Ownership: D (Direct)
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F10] Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
[F10] Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
[Transaction #4]
Security: Restricted Stock Unit-14
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: -19,816 | Price: $0.00
Shares Owned After: 336,872 | Ownership: D (Direct)
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F11] Five percent (5%) of the restricted stock awarded vested on November 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
[F11] Five percent (5%) of the restricted stock awarded vested on November 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
[Transaction #5]
Security: Restricted Stock Unit-8
Date: 2026-05-20 | Code: M (Exercise of derivative)
Shares: -3,884 | Price: $0.00
Shares Owned After: 7,764 | Ownership: D (Direct)
Footnotes:
[F1] Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
[F12] Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2023 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
[F12] Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2023 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
--- Holdings ---
[Holding #1]
Security: Common Stock
Ownership: D (Direct)
[Holding #2]
Security: Common Stock
Ownership: I (Indirect)
Footnotes:
[F4] These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.
[Holding #3]
Security: Common Stock
Ownership: I (Indirect)
Footnotes:
[F5] These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.
[Holding #4]
Security: Common Stock
Ownership: I (Indirect)
Footnotes:
[F6] Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts.
[Holding #5]
Security: Common Stock
Ownership: I (Indirect)
Footnotes:
[F7] Reporting person is the trustee of the Kenneth Duda Annuity Trusts.
--- Footnotes (Complete Index) ---
F1: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
F10: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
F11: Five percent (5%) of the restricted stock awarded vested on November 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
F12: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2023 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
F2: These shares are held by a family trust for which the reporting person is co-trustee.
F3: Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.
F4: These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.
F5: These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.
F6: Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts.
F7: Reporting person is the trustee of the Kenneth Duda Annuity Trusts.
F8: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2026 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
F9: Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on on February 20, 2024 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
--- Signature ---
/s/ By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Kenneth Duda (2026-05-22)
