Arista Networks director sells 1,395 shares

Arista Networks, Inc. director Yvonne Wassenaar sold 1,395 shares of common stock in open-market transactions on April 15, 2026 under a pre-arranged Rule 10b5-1 trading plan.

Rhea-AI Filing Summary

Arista Networks, Inc. director Yvonne Wassenaar sold 1,395 shares of common stock in open-market transactions on April 15, 2026 under a pre-arranged Rule 10b5-1 trading plan. The sales occurred at weighted-average prices generally between $150.68 and $154.72 per share. Following these transactions, she continues to directly own 9,784 shares of Arista Networks common stock.

Insights

Equity markets analyst

Pre-planned, modest Arista director stock sales look routine.

Arista Networks director Yvonne Wassenaar executed open-market sales totaling 1,395 common shares on April 15, 2026. All trades were coded as sales and priced around $151–$155 per share based on weighted-average prices.

A footnote states the transactions were made pursuant to a Rule 10b5-1 trading plan adopted on November 21, 2025, indicating they were pre-scheduled rather than opportunistic. After the sales, she directly holds 9,784 shares, so the transactions reduce but do not eliminate her equity position.

The filing shows no option exercises or derivative positions in the accompanying derivative summary. Taken together, the pattern is consistent with routine portfolio management by an outside director, rather than a transformational change in insider ownership.

Insider Trade Summary 10b5-1

Net Seller: 1,395 shares

Net Sell 5 txns

Insider Wassenaar Yvonne

Role Director

Sold 1,395 shs ($214K)

Type	Security	Shares	Price	Value
Sale	Common Stock	78	$151.0697	$12K
Sale	Common Stock	414	$152.3063	$63K
Sale	Common Stock	607	$153.3513	$93K
Sale	Common Stock	290	$154.075	$45K
Sale	Common Stock	6	$154.72	$928.32

Holdings After Transaction: Common Stock — 9,784 shares (Direct)

Footnotes (5)

1. F1. 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.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $150.68 to $151.56, 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.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $151.69 to $152.68, 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.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $152.69 to $153.68, 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.
5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $153.72 to $154.46, 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.

Key Figures

Shares sold: 1,395 shares Sample transaction price: $153.3513 per share Additional transaction price: $154.0750 per share +3 more

6 metrics

Shares sold 1,395 shares Total common stock sold on April 15, 2026

Sample transaction price $153.3513 per share Weighted-average price for 607-share sale

Additional transaction price $154.0750 per share Weighted-average price for 290-share sale

Post-trade holdings 9,784 shares Common stock directly owned after final sale

10b5-1 plan adoption date November 21, 2025 Date Wassenaar adopted trading plan governing these sales

Price range example $150.68–$151.56 Weighted-average price band for one sale group

Key Terms

Rule 10b5-1 trading plan, weighted average price, open-market sale, non-derivative, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open-market sale financial

"transaction_action":"open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

non-derivative financial

"transaction_type":"non-derivative""

Common Stock financial

"security_title":"Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What insider transaction did Arista Networks (ANET) director Yvonne Wassenaar report?

Yvonne Wassenaar reported selling 1,395 shares of Arista Networks common stock in open-market transactions. The trades occurred on April 15, 2026 at weighted-average prices around the low-to-mid $150s per share, as detailed in multiple price-range footnotes in the filing.

At what prices were the Arista Networks (ANET) shares sold by director Yvonne Wassenaar?

The reported weighted-average sale prices ranged from about $151 to $155 per share. Footnotes specify detailed bands, including $150.68–$151.56, $151.69–$152.68, $152.69–$153.68, and $153.72–$154.46, reflecting multiple trades within each price range on the transaction date.

How many Arista Networks (ANET) shares does Yvonne Wassenaar hold after the reported sales?

After the disclosed April 15, 2026 transactions, Yvonne Wassenaar directly holds 9,784 shares of Arista Networks common stock. This figure represents her remaining direct ownership as reported in the Form 4, following the aggregate sale of 1,395 shares in several open-market trades.

Were Yvonne Wassenaar’s Arista Networks (ANET) stock sales made under a Rule 10b5-1 plan?

Yes. A footnote explains the reported sales were made under a Rule 10b5-1 trading plan adopted on November 21, 2025. Such plans pre-schedule trades, indicating these transactions were arranged in advance rather than timed in response to short-term market developments.

Did the Arista Networks (ANET) Form 4 show any option exercises or derivative transactions?

No derivative activities are shown in the derivative summary for this Form 4. The filing lists only non-derivative transactions in common stock, all coded as open-market sales, and indicates zero derivative transactions and zero exercise shares during the reported period.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 04/17/2026 - 07:25 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).

X

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)
04/15/2026

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	04/15/2026		S(1)		78	D	$151.0697(2)	11,101	D
Common Stock	04/15/2026		S(1)		414	D	$152.3063(3)	10,687	D
Common Stock	04/15/2026		S(1)		607	D	$153.3513(4)	10,080	D
Common Stock	04/15/2026		S(1)		290	D	$154.075(5)	9,790	D
Common Stock	04/15/2026		S(1)		6	D	$154.72	9,784	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

Explanation of Responses:

1. 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.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $150.68 to $151.56, 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.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $151.69 to $152.68, 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.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $152.69 to $153.68, 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.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $153.72 to $154.46, 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.

	By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Yvonne Wassenaar	04/17/2026
	** 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)