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Giancarlo family trust sells 8,000 Arista (NYSE: ANET) shares under 10b5-1 plan

Filing Impact
(High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Arista Networks, Inc. director Charles H. Giancarlo reported that a family trust for which he is co-trustee sold 8,000 shares of Arista common stock on July 1, 2026 in a series of open-market transactions under a pre-arranged Rule 10b5-1 trading plan. Sale prices for the individual trades, reported as weighted averages, ranged across multiple levels, including $170.0306 and $163.9981 per share. Following these transactions, the filing shows the trust holding 200,305 shares indirectly, while Giancarlo also holds 971 shares directly.

Positive

  • None.

Negative

  • None.
Insider Giancarlo Charles H
Role null
Sold 8,000 shs ($1.34M)
Type Security Shares Price Value
Sale Common Stock 28 $162.3357 $5K
Sale Common Stock 279 $162.617 $45K
Sale Common Stock 490 $163.9981 $80K
Sale Common Stock 799 $165.371 $132K
Sale Common Stock 1,321 $166.3336 $220K
Sale Common Stock 2,133 $167.3551 $357K
Sale Common Stock 1,785 $168.1151 $300K
Sale Common Stock 1,002 $169.2338 $170K
Sale Common Stock 163 $170.0306 $28K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 200,305 shares (Indirect, by Trust); Common Stock — 971 shares (Direct, null)
Footnotes (1)
  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 $161.44 to $162.39, 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 $162.54 to $163.47, 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 $163.67 to $164.20, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $164.80 to $165.7995, 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 $165.80 to $166.7925, 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 $166.80 to $167.79, 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 $167.80 to $168.78, 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 $168.82 to $169.8153, 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 $169.8442 to $170.41, 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.
Shares sold 8,000 shares Total common stock sold on July 1, 2026
Sale price example $170.0306 per share Weighted average price for one sale block
Sale price example $163.9981 per share Weighted average price for another sale block
Indirect holdings after sale 200,305 shares Common stock held by family trust after transactions
Direct holdings after sale 971 shares Common stock held directly after transactions
Net share change 8,000 shares Net-sell shares from transaction summary
Rule 10b5-1 trading plan regulatory
"This sale was effected pursuant to a Rule 10b5-1 trading plan"
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.
family trust financial
"These shares are held by a family trust for which the reporting person is co-trustee."
indirect ownership financial
""direct_or_indirect": "I","nature_of_ownership": "by Trust""
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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock07/01/2026S(1)28D$162.3357(2)200,305Iby Trust(3)
Common Stock07/01/2026S(1)279D$162.617(4)200,026Iby Trust(3)
Common Stock07/01/2026S(1)490D$163.9981(5)199,536Iby Trust(3)
Common Stock07/01/2026S(1)799D$165.371(6)198,737Iby Trust(3)
Common Stock07/01/2026S(1)1,321D$166.3336(7)197,416Iby Trust(3)
Common Stock07/01/2026S(1)2,133D$167.3551(8)195,283Iby Trust(3)
Common Stock07/01/2026S(1)1,785D$168.1151(9)193,498Iby Trust(3)
Common Stock07/01/2026S(1)1,002D$169.2338(10)192,496Iby Trust(3)
Common Stock07/01/2026S(1)163D$170.0306(11)192,333Iby Trust(3)
Common Stock971D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
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 $161.44 to $162.39, 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 $162.54 to $163.47, 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 $163.67 to $164.20, 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.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $164.80 to $165.7995, 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 $165.80 to $166.7925, 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.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $166.80 to $167.79, 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.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $167.80 to $168.78, 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.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $168.82 to $169.8153, 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.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $169.8442 to $170.41, 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- For: Charles Giancarlo07/06/2026
** Signature of Reporting PersonDate
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 insider transaction did Arista Networks (ANET) report for Charles H. Giancarlo?

Arista Networks reported that a family trust associated with director Charles H. Giancarlo sold 8,000 shares of common stock. The transactions occurred on July 1, 2026, as multiple open-market sales disclosed in a Form 4 insider trading report.

At what prices did the 8,000 Arista Networks (ANET) shares sell in Giancarlo’s Form 4?

The reported sales used weighted average prices for each trade block, including $170.0306 and $163.9981 per share. Footnotes state the underlying trades occurred across narrower ranges for each block, executed as open-market transactions on July 1, 2026.

Was Charles H. Giancarlo’s Arista Networks (ANET) stock sale pre-planned?

Yes. A footnote explains the sale was executed under a Rule 10b5-1 trading plan Giancarlo entered into on June 12, 2025. Such plans pre-schedule trades, helping separate personal trading decisions from nonpublic information.

How many Arista Networks (ANET) shares does Giancarlo hold after this Form 4 transaction?

After these sales, the Form 4 shows a family trust holding 200,305 Arista Networks shares indirectly for which Giancarlo is co-trustee. It also reports 971 shares held directly, providing a snapshot of his remaining ownership position.

Are Giancarlo’s Arista Networks (ANET) shares held directly or through a trust?

The filing shows a mix of ownership: 200,305 shares are held indirectly by a family trust for which Giancarlo serves as co-trustee, while 971 shares are listed as directly owned. The trust structure is explained in a dedicated footnote.

What does the Rule 10b5-1 reference mean in the Arista Networks (ANET) Form 4?

The Form 4 notes the sale was made under a Rule 10b5-1 trading plan entered June 12, 2025. These SEC-sanctioned plans allow insiders to schedule trades in advance, providing a framework for more routine, pre-arranged transactions.