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  4. [Form 4] Arista Networks, Inc. Insider Trading Activity

Arista Networks (NYSE: ANET) director's trust sells 8,000 shares

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

Rhea-AI Filing Summary

At Arista Networks, Inc., a director, through a family trust for which the director is co-trustee, sold 8,000 shares of common stock on August 3, 2026 in multiple open-market transactions, at weighted-average prices ranging from about $174 to $186 per share.

These sales were effected under a Rule 10b5-1 trading plan entered on June 12, 2025. Following these transactions, the director also holds 971 shares of common stock directly.

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Insider Giancarlo Charles H
Role Director
Sold 8,000 shs ($1.45M)
Type Security Shares Price Value
Sale Common Stock F1, F2, F3 322 $174.4949 $56K
Sale Common Stock F1, F4, F3 817 $175.4648 $143K
Sale Common Stock F1, F5, F3 403 $176.5135 $71K
Sale Common Stock F1, F6, F3 382 $177.3921 $68K
Sale Common Stock F1, F7, F3 417 $178.8179 $75K
Sale Common Stock F1, F8, F3 536 $179.8464 $96K
Sale Common Stock F1, F9, F3 1,119 $180.7403 $202K
Sale Common Stock F1, F10, F3 825 $181.8137 $150K
Sale Common Stock F1, F11, F3 558 $182.8007 $102K
Sale Common Stock F1, F12, F3 478 $183.8722 $88K
Sale Common Stock F1, F13, F3 1,303 $184.6839 $241K
Sale Common Stock F1, F14, F3 738 $185.6168 $137K
Sale Common Stock F1, F15, F3 102 $186.347 $19K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 184,333 shares (Indirect, by Trust); Common Stock — 971 shares (Direct)
Footnotes (15)
  1. F1. This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 12, 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 $174.0141 to $175.0015, 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. These shares are held by a family trust for which the reporting person is co-trustee.
  4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $175.0785 to $176.0589, 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 $176.11 to $176.7783, 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. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.142 to $178.13, 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. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $178.1689 to $179.1092, 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. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $179.17 to $180.1592, 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. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $180.24 to $181.23, 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. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $181.25 to $182.24, 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. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.25 to $183.23, 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.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.25 to $184.24, 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.
  13. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.25 to $185.2409, 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.
  14. F14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.25 to $186.23, 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.
  15. F15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.252 to $186.52, 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 Arista Networks common shares sold on August 3, 2026 by the family trust
Lowest weighted-average sale price $174.4949 per share One of the open-market sale prices reported for August 3, 2026
Highest weighted-average sale price $186.3470 per share One of the open-market sale prices reported for August 3, 2026
Direct shares held 971 shares Common stock held directly by the reporting director as of August 3, 2026
Rule 10b5-1 plan date June 12, 2025 Date the trading plan governing the reported sales was entered
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. These shares..."
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..."
co-trustee financial
"These shares are held by a family trust for which the reporting person is co-trustee."

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Form 4 Insider Transactions: What Each Field Means →

FAQ

What insider stock activity did Arista Networks (ANET) disclose in this Form 4?
Arista Networks (ANET) disclosed that a company director, via a family trust, sold 8,000 common shares on August 3, 2026. The sales occurred in multiple open-market trades at weighted-average prices between roughly $174 and $186 per share under a pre-set trading plan.

How many Arista Networks (ANET) shares were sold and at what prices?
A total of 8,000 ANET shares were sold in 13 separate transactions on August 3, 2026. Weighted-average sale prices for each block ranged from about $174.49 to $186.35 per share, with individual trades executed within detailed price ranges noted in the footnotes.

Were the Arista Networks (ANET) insider sales made under a Rule 10b5-1 trading plan?
Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan entered into on June 12, 2025. Such plans pre-arrange trade parameters, and the footnote specifies that this plan governed the reported August 3, 2026 transactions.

Who actually held the Arista Networks (ANET) shares that were sold?
The sold ANET shares were held by a family trust for which the reporting person is co-trustee. The transactions are reported as indirect ownership, meaning the trust, rather than the individual personally, was the direct holder of the shares sold.

What Arista Networks (ANET) holdings does the director report after these transactions?
After the reported sales, the director reports 971 ANET common shares held directly. The Form 4 does not list the remaining balance in the family trust, but it distinguishes between these direct holdings and the indirectly held shares sold by the trust.

On what date did the Arista Networks (ANET) director’s trust sell shares, and how many trades were involved?
All reported sales occurred on August 3, 2026, with the trust executing 13 separate open-market transactions. Each transaction block has its own weighted-average price and detailed intraday price range, as described in the accompanying footnotes.
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)
08/03/2026		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 Stock08/03/2026S(1)322D$174.4949(2)192,011Iby Trust(3)
Common Stock08/03/2026S(1)817D$175.4648(4)191,194Iby Trust(3)
Common Stock08/03/2026S(1)403D$176.5135(5)190,791Iby Trust(3)
Common Stock08/03/2026S(1)382D$177.3921(6)190,409Iby Trust(3)
Common Stock08/03/2026S(1)417D$178.8179(7)189,992Iby Trust(3)
Common Stock08/03/2026S(1)536D$179.8464(8)189,456Iby Trust(3)
Common Stock08/03/2026S(1)1,119D$180.7403(9)188,337Iby Trust(3)
Common Stock08/03/2026S(1)825D$181.8137(10)187,512Iby Trust(3)
Common Stock08/03/2026S(1)558D$182.8007(11)186,954Iby Trust(3)
Common Stock08/03/2026S(1)478D$183.8722(12)186,476Iby Trust(3)
Common Stock08/03/2026S(1)1,303D$184.6839(13)185,173Iby Trust(3)
Common Stock08/03/2026S(1)738D$185.6168(14)184,435Iby Trust(3)
Common Stock08/03/2026S(1)102D$186.347(15)184,333Iby 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 $174.0141 to $175.0015, 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 $175.0785 to $176.0589, 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 $176.11 to $176.7783, 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 $177.142 to $178.13, 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 $178.1689 to $179.1092, 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 $179.17 to $180.1592, 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 $180.24 to $181.23, 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 $181.25 to $182.24, 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 $182.25 to $183.23, 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.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.25 to $184.24, 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.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.25 to $185.2409, 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.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.25 to $186.23, 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.
15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.252 to $186.52, 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 Giancarlo08/05/2026
** 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