538 Arista stock units vest for director Wassenaar

Arista Networks, Inc. (ANET) director Yvonne Wassenaar reported the exercise of 538 Restricted Stock Units into 538 shares of Common Stock on August 20, 2026.

Rhea-AI Filing Summary

Arista Networks, Inc. (ANET) director Yvonne Wassenaar reported the exercise of 538 Restricted Stock Units into 538 shares of Common Stock on August 20, 2026. The RSU award represents a contingent right to receive one share of Common Stock per unit upon vesting. Following the transaction, she directly holds 10,322 shares of Common Stock and 1,615 RSUs. The RSUs were granted on May 29, 2026 and vest quarterly, with one-quarter (including these 538 units) vesting on August 20, 2026 and additional portions vesting on specified quarterly vest dates thereafter.

Insider Trade Summary

538 shares exercised/converted

Exercise 2 txns

Insider Wassenaar Yvonne

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit-5 F1, F2	538	$0.00	$0.00
Exercise	Common Stock F1	538	$0.00	$0.00

Holdings After Transaction: Restricted Stock Unit-5 — 1,615 contracts (Direct); Common Stock — 10,322 shares (Direct)

Footnotes (2)

1. F1. Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
2. F2. The reporting person was granted RSUs on May 29, 2026. 1/4th of the shares vest on August 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, or November 20.

Key Figures

RSUs exercised: 538 shares Common Stock acquired: 538 shares Common Stock holdings after transaction: 10,322 shares +4 more

7 metrics

RSUs exercised 538 shares Restricted Stock Units converted into Common Stock on August 20, 2026

Common Stock acquired 538 shares Shares received upon RSU exercise on August 20, 2026

Common Stock holdings after transaction 10,322 shares Direct ownership by Yvonne Wassenaar following August 20, 2026 transactions

RSU holdings after transaction 1,615 units Remaining Restricted Stock Units representing contingent rights to Common Stock

RSU conversion price $0.0000 per share Exercise or conversion of derivative RSUs into Common Stock

RSU grant date May 29, 2026 Grant date of the Restricted Stock Units to the reporting person

Initial quarterly vest date August 20, 2026 One-quarter of RSUs vest on this date, with continued quarterly vesting thereafter

Key Terms

Restricted Stock Unit, contingent right, quarterly vest date

3 terms

Restricted Stock Unit financial

"Each restricted stock unit represents a contingent right to receive one share"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

contingent right financial

"represents a contingent right to receive one share of Arista Networks"

quarterly vest date financial

"will continue to vest at the same rate on each quarterly vest date"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did ANET director Yvonne Wassenaar report?

She reported exercising 538 Restricted Stock Units into 538 shares of Arista Networks, Inc. Common Stock on August 20, 2026, at a conversion price of $0.00 per share as part of her equity compensation vesting.

How many ANET common shares does Yvonne Wassenaar own after this Form 4?

After the reported transactions, Yvonne Wassenaar directly owns 10,322 shares of Arista Networks, Inc. Common Stock, as disclosed in the Form 4 following the RSU-to-common-stock conversion on August 20, 2026.

How many Restricted Stock Units does Yvonne Wassenaar hold in ANET after the transaction?

Following the derivative transaction, she holds 1,615 Restricted Stock Units, each representing a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting, according to the disclosure and related footnote.

What are the vesting terms of Yvonne Wassenaar’s ANET RSU grant?

The RSUs were granted on May 29, 2026. One-quarter of the shares vest on August 20, 2026, and they continue to vest at the same rate on each quarterly vest date, which is the first market trading day on or after February 20, May 20, August 20, or November 20.

Was Yvonne Wassenaar’s ANET Form 4 transaction under a Rule 10b5-1 plan?

The filing indicates the Rule 10b5-1 checkbox is not affirmed (aff_10b5_one is false) and the footnotes do not state that these transactions were executed under a Rule 10b5-1 trading plan.

Does the ANET Form 4 show a net buy or sell by Yvonne Wassenaar?

The filing shows an RSU conversion where 538 derivative RSUs were disposed and 538 common shares were acquired. The transactionSummary reports netBuySellShares of 0, reflecting a neutral net share change from this exercise.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 08/24/2026 - 06:13 PM EDT Accepted by SEC EDGAR 08/24/2026 - 06:12 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Wassenaar Yvonne

(Last) (First) (Middle)

5453 GREAT AMERICA PARKWAY

(Street)

SANTA CLARA CALIFORNIA 95054

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Arista Networks, Inc. [ ANET ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/20/2026		M		538	A	$0.0(1)	10,322	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit-5	$0.0(1)	08/20/2026		M			538	(2)	(2)	Common Stock	538	$0.0	1,615	D

Explanation of Responses:

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

2. The reporting person was granted RSUs on May 29, 2026. 1/4th of the shares vest on August 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, or November 20.

	By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Yvonne Wassenaar	08/24/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)