Were the Arista Networks (ANET) share sales by the Giancarlo trust pre-planned?

Yes. The filing states the sale was effected under a Rule 10b5-1 trading plan that the reporting person entered into on June 12, 2025 , indicating the transactions were pre-arranged rather than discretionary at the time of sale.

Trust linked to Arista (NYSE: ANET) director sells 8,000 shares

Q: What did Arista Networks (ANET) director Charles H. Giancarlo report in this Form 4?

He reported that a family trust associated with him sold 8,000 shares of Arista Networks common stock in open-market transactions on May 1, 2026, while retaining over 200,000 shares indirectly after the sales.

Q: At what prices were the 8,000 Arista Networks (ANET) shares sold?

The Form 4 lists weighted-average prices for each line item, with underlying trades executed in ranges from about $172.6688 to $176.9387 per share, reflecting multiple individual transactions within each reported price range.

Q: Who actually holds the Arista Networks (ANET) shares reported in this Form 4?

The shares are held by a family trust for which Charles H. Giancarlo serves as co-trustee . The Form 4 classifies the position as indirect ownership , meaning the holdings are attributed to him through the trust rather than directly.

Filing Impact

(High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Arista Networks director Charles H. Giancarlo, through a family trust for which he is co-trustee, reported selling a total of 8,000 shares of Arista Networks common stock in a series of open-market sales on May 1, 2026.

The sales were executed under a Rule 10b5-1 trading plan entered into on June 12, 2025, at weighted-average prices that reflect multiple trades in ranges from $172.6688 to $176.9387 per share. After these transactions, the family trust continues to hold over 200,000 Arista Networks shares indirectly attributed to Giancarlo.

Insider Trade Summary 10b5-1

Net Seller: 8,000 shares ($1,403,202)

Net Sell 5 txns

Insider Giancarlo Charles H

Role null

Sold 8,000 shs ($1.40M)

Type	Security	Shares	Price	Value
Sale	Common Stock	467	$173.3876	$81K
Sale	Common Stock	1,000	$174.2526	$174K
Sale	Common Stock	3,203	$175.3003	$561K
Sale	Common Stock	3,151	$176.0794	$555K
Sale	Common Stock	179	$176.8936	$32K

Holdings After Transaction: Common Stock — 215,866 shares (Indirect, by Trust)

Footnotes (1)

This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 12, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $172.6688 to $173.66, 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. These shares are held by a family trust for which the reporting person is co-trustee. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $173.67 to $174.6679, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $174.6874 to $175.6868, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $175.69 to $176.6631, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $176.778 to $176.9387, 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: 8,000 shares Lowest trade price range: $172.6688–$173.66 Highest trade price range: $176.778–$176.9387 +4 more

7 metrics

Shares sold 8,000 shares Total common shares sold on May 1, 2026

Lowest trade price range $172.6688–$173.66 Price range for one weighted-average sale bucket

Highest trade price range $176.778–$176.9387 Price range for another weighted-average sale bucket

Post-sale holdings (approximate) Over 200,000 shares Indirect shares held by family trust after transactions

Number of sale transactions reported 5 entries Separate Form 4 line items, all coded as open-market sales

Trading plan date June 12, 2025 Date Rule 10b5-1 plan was entered into

Transaction date May 1, 2026 Date of reported open-market sales

Key Terms

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

5 terms

Rule 10b5-1 trading plan regulatory

"This sale was effected pursuant to a Rule 10b5-1 trading plan entered into..."

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.

family trust financial

"These shares are held by a family trust for which the reporting person is co-trustee."

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.

indirect ownership financial

"ownership_type: indirect, nature_of_ownership: by Trust"

Form 4 Insider Transactions: What Each Field Means →

05/05/2026 - 05:52 PM

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^*

Giancarlo Charles H

(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)
05/01/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/01/2026		S⁽¹⁾		467	D	$173.3876⁽²⁾	215,866	I	by Trust⁽³⁾
Common Stock	05/01/2026		S⁽¹⁾		1,000	D	$174.2526⁽⁴⁾	214,866	I	by Trust⁽³⁾
Common Stock	05/01/2026		S⁽¹⁾		3,203	D	$175.3003⁽⁵⁾	211,663	I	by Trust⁽³⁾
Common Stock	05/01/2026		S⁽¹⁾		3,151	D	$176.0794⁽⁶⁾	208,512	I	by Trust⁽³⁾
Common Stock	05/01/2026		S⁽¹⁾		179	D	$176.8936⁽⁷⁾	208,333	I	by Trust⁽³⁾

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 12, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $172.6688 to $173.66, 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. These shares are held by a family trust for which the reporting person is co-trustee.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $173.67 to $174.6679, 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 $174.6874 to $175.6868, 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.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $175.69 to $176.6631, 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.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $176.778 to $176.9387, 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: Charles Giancarlo	05/05/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What did Arista Networks (ANET) director Charles H. Giancarlo report in this Form 4?

He reported that a family trust associated with him sold 8,000 shares of Arista Networks common stock in open-market transactions on May 1, 2026, while retaining over 200,000 shares indirectly after the sales.

At what prices were the 8,000 Arista Networks (ANET) shares sold?

The Form 4 lists weighted-average prices for each line item, with underlying trades executed in ranges from about $172.6688 to $176.9387 per share, reflecting multiple individual transactions within each reported price range.

Who actually holds the Arista Networks (ANET) shares reported in this Form 4?

The shares are held by a family trust for which Charles H. Giancarlo serves as co-trustee. The Form 4 classifies the position as indirect ownership, meaning the holdings are attributed to him through the trust rather than directly.

How many Arista Networks (ANET) shares remain held after the reported sales?

After the 8,000-share sale, the Form 4 line items show the family trust still holding more than 200,000 shares of Arista Networks common stock indirectly attributable to Charles H. Giancarlo, indicating a substantial remaining position.