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

Arista insider Bechtolsheim sells 300K shares

A ten percent owner of ANET reported 300,000 trust-held shares sold in multiple Rule 10b5-1 plan transactions on September 17, 2026.

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

Rhea-AI Filing Summary

Arista Networks, Inc. (ANET) reported that ten percent owner Andreas Bechtolsheim filed to disclose multiple indirect sales of common stock on September 17, 2026. A family trust for which he is trustee sold an aggregate 300,000 shares in 12 open-market transactions at weighted average prices ranging from the low $190s to low $200s per share. The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on February 20, 2026, and the shares are held by a family trust.

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Insider BECHTOLSHEIM ANDREAS
Role 10% Owner
Sold 300,000 shs ($59.69M)
Type Security Shares Price Value
Sale Common Stock F1, F2, F3 7,168 $193.6132 $1.39M
Sale Common Stock F1, F4, F3 29,271 $194.5232 $5.69M
Sale Common Stock F1, F5, F3 32,836 $195.4723 $6.42M
Sale Common Stock F1, F6, F3 20,418 $196.2902 $4.01M
Sale Common Stock F1, F7, F3 17,947 $197.5058 $3.54M
Sale Common Stock F1, F8, F3 26,435 $198.331 $5.24M
Sale Common Stock F1, F9, F3 38,920 $199.5811 $7.77M
Sale Common Stock F1, F10, F3 58,043 $200.3797 $11.63M
Sale Common Stock F1, F11, F3 16,239 $201.3352 $3.27M
Sale Common Stock F1, F12, F3 15,701 $202.3952 $3.18M
Sale Common Stock F1, F13, F3 25,096 $203.5602 $5.11M
Sale Common Stock F1, F14, F3 11,926 $204.3062 $2.44M
Holdings After Transaction: Common Stock — 180,543,048 shares (Indirect, by Trust)
Footnotes (14)
  1. F1. The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on February 20, 2026.
  2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $192.98 to $193.96, 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 a 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 $194.00 to $194.99, 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 $195.00 to $195.99, 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 $196.00 to $196.99, 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 $197.00 to $197.9975, 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 $198.00 to $198.94, 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 $199.00 to $199.99, 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 $200.00 to $200.985, 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 $201.00 to $201.95, 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 $202.00 to $202.99, 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 $203.00 to $203.9975, 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 $204.00 to $204.84, 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.
Total shares sold 300,000 shares Aggregate common stock sales reported for September 17, 2026
Number of sale transactions 12 transactions Non-derivative sales of common stock on September 17, 2026
Example sale price $193.6132 per share One block of 7,168 shares sold on September 17, 2026
Highest reported weighted average price range $204.00–$204.84 Price range for one sale block as described in footnote F14
Net buy/sell shares 300,000 shares sold Netted across all reported transactions in the filing
Rule 10b5-1 plan adoption date February 20, 2026 Date the trading plan governing these transactions was entered into
Rule 10b5-1 trading plan regulatory
"The exercise and/or sale of shares 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 were sold in multiple transactions..."
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 a trustee."

FAQ

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

What insider activity did ANET report for Andreas Bechtolsheim on this Form 4?
The filing reports that a family trust associated with ten percent owner Andreas Bechtolsheim sold 300,000 shares of Arista Networks, Inc. common stock in 12 open-market transactions on September 17, 2026.

At what prices were the 300,000 ANET shares sold on September 17, 2026?
The transactions were reported at weighted average prices per block, with ranges disclosed in footnotes. These ranges span from approximately $192.98–$193.96 on the low end up to about $204.00–$204.84 on the high end.

Were the ANET stock sales by Andreas Bechtolsheim under a Rule 10b5-1 plan?
Yes. The filing states the exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on February 20, 2026.

Who actually holds the ANET shares involved in these Form 4 transactions?
The filing states the shares are held by a family trust for which Andreas Bechtolsheim is a trustee, and the ownership is reported as indirect "by Trust."

How many sale transactions of ANET stock were reported and were there any purchases?
The transaction summary shows 12 sale transactions totaling 300,000 shares and 0 purchase transactions, resulting in net reported activity of 300,000 shares sold.

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

Form 4 Insider Transactions: What Each Field Means →
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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*
BECHTOLSHEIM ANDREAS
(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)
DirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/17/2026		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 Stock09/17/2026S(1)7,168D$193.6132(2)180,835,880Iby Trust(3)
Common Stock09/17/2026S(1)29,271D$194.5232(4)180,806,609Iby Trust(3)
Common Stock09/17/2026S(1)32,836D$195.4723(5)180,773,773Iby Trust(3)
Common Stock09/17/2026S(1)20,418D$196.2902(6)180,753,355Iby Trust(3)
Common Stock09/17/2026S(1)17,947D$197.5058(7)180,735,408Iby Trust(3)
Common Stock09/17/2026S(1)26,435D$198.331(8)180,708,973Iby Trust(3)
Common Stock09/17/2026S(1)38,920D$199.5811(9)180,670,053Iby Trust(3)
Common Stock09/17/2026S(1)58,043D$200.3797(10)180,612,010Iby Trust(3)
Common Stock09/17/2026S(1)16,239D$201.3352(11)180,595,771Iby Trust(3)
Common Stock09/17/2026S(1)15,701D$202.3952(12)180,580,070Iby Trust(3)
Common Stock09/17/2026S(1)25,096D$203.5602(13)180,554,974Iby Trust(3)
Common Stock09/17/2026S(1)11,926D$204.3062(14)180,543,048Iby 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on February 20, 2026.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $192.98 to $193.96, 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 a trustee.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $194.00 to $194.99, 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 $195.00 to $195.99, 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 $196.00 to $196.99, 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 $197.00 to $197.9975, 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 $198.00 to $198.94, 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 $199.00 to $199.99, 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 $200.00 to $200.985, 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 $201.00 to $201.95, 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 $202.00 to $202.99, 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 $203.00 to $203.9975, 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 $204.00 to $204.84, 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: Andreas Bechtolsheim09/21/2026
** 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

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