Yvonne Wassenaar - 20 May 2026 Form 4 Insider Report for Arista Networks, Inc. (ANET)

Reporting relationship: Director
Issuer ticker: ANET
Reported as of: 20 May 2026
Net transaction value: -$136,846
SEC form: 4
Accepted by SEC: 22 May 2026, 18:47:49 UTC
Prior SEC filing: 17 Apr 2026
Next SEC filing: 22 May 2026
Source filing: View source filing
Reporting owner signature: By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Yvonne Wassenaar

Key filing fact

Yvonne Wassenaar filed Form 4 for Arista Networks, Inc. (ANET) on 22 May 2026.

Key facts

This page summarizes Yvonne Wassenaar's Form 4 filing for Arista Networks, Inc. (ANET).
6 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 22 May 2026, 18:47.

Change

Previous filing in this sequence was filed on 17 Apr 2026.
Current net transaction value: -$136,846.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001707744 Primary reporting owner

Wassenaar Yvonne

Relationship: Director
Address: 5453 GREAT AMERICA PARKWAY, SANTA CLARA
Signature: By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Yvonne Wassenaar
Signature date: 22 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ANET transaction

Common Stock

Options Exercise

Transaction value
Shares: +971
Change %: +9.9%
Price: $0.000000^*
Shares after: 10,755
Date: 20 May 2026
Ownership: Direct
Footnotes: F1

ANET transaction

Common Stock

Sale

Transaction value: $45,325
Shares: -324
Change %: -3%
Price: $139.89
Shares after: 10,431
Date: 20 May 2026
Ownership: Direct
Footnotes: F2, F3

ANET transaction

Common Stock

Sale

Transaction value: $46,344
Shares: -329
Change %: -3.2%
Price: $140.86
Shares after: 10,102
Date: 20 May 2026
Ownership: Direct
Footnotes: F2, F4

ANET transaction

Common Stock

Sale

Transaction value: $34,338
Shares: -242
Change %: -2.4%
Price: $141.89
Shares after: 9,860
Date: 20 May 2026
Ownership: Direct
Footnotes: F2, F5

ANET transaction

Common Stock

Sale

Transaction value: $10,839
Shares: -76
Change %: -0.77%
Price: $142.62
Shares after: 9,784
Date: 20 May 2026
Ownership: Direct
Footnotes: F2, F6

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ANET transaction Derivative

Restricted Stock Unit-4

Options Exercise

Transaction value
Shares: -971
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 20 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 971
Exercise price: $0.000000
Footnotes: F1, F7

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 7 footnotes

Footnote F1

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

Footnote F2

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 November 21, 2025.

Footnote F3

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $139.36 to $140.35, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F4

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $140.36 to $141.35, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F5

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $141.36 to $142.35, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F6

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $142.37 to $143.20, 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.

Footnote F7

The reporting person was granted RSUs on May 30, 2025. 1/4th of the shares vest on August 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, or November 20.