STOCK TITAN

Arista Networks (ANET) CTO Duda sells 58K shares after 32K option exercise

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

Rhea-AI Filing Summary

Arista Networks, Inc. President and CTO Kenneth Duda reported a mix of option exercise and share sales in Arista common stock on April 17, 2026.

He exercised options to acquire 32,000 shares at an exercise price of $15.2625 per share and, in a series of open‑market transactions, entities associated with him sold an aggregate of 58,000 shares at weighted average prices generally between about $160 and $165 per share, under Rule 10b5‑1 trading plans.

Following these transactions, Duda holds 43,652 shares directly and maintains significant indirect holdings, including 1,094,506 shares held by a children’s trust where he is co‑trustee, 501,986 shares held by a 501(c) foundation for which he and his spouse serve as co‑trustees, and additional shares in family and annuity trusts. Certain indirect holdings are reported with disclaimers of beneficial ownership.

Positive

  • None.

Negative

  • None.
Insider Duda Kenneth
Role President and CTO
Sold 58,000 shs ($9.47M)
Type Security Shares Price Value
Exercise Non-Qualified Stock Option (right to buy) 32,000 $0.00 --
Exercise Common Stock 32,000 $15.2625 $488K
Sale Common Stock 1,324 $161.1808 $213K
Sale Common Stock 9,892 $162.1464 $1.60M
Sale Common Stock 6,410 $163.0981 $1.05M
Sale Common Stock 9,592 $164.1796 $1.57M
Sale Common Stock 4,782 $164.8584 $788K
Sale Common Stock 662 $161.1808 $107K
Sale Common Stock 4,946 $162.1464 $802K
Sale Common Stock 3,205 $163.0981 $523K
Sale Common Stock 4,796 $164.1796 $787K
Sale Common Stock 2,391 $164.8584 $394K
Sale Common Stock 414 $161.1808 $67K
Sale Common Stock 3,091 $162.1464 $501K
Sale Common Stock 2,003 $163.0981 $327K
Sale Common Stock 2,998 $164.1796 $492K
Sale Common Stock 1,494 $164.8584 $246K
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Non-Qualified Stock Option (right to buy) — 32,000 shares (Direct, null); Common Stock — 44,976 shares (Direct, null); Common Stock — 1,094,506 shares (Indirect, By Childrens' Trust)
Footnotes (1)
  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 March 13, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $160.53 to $161.50, 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 $161.59 to $162.57, 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 $162.59 to $163.589, 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 $163.5911 to $164.59, 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 $164.60 to $165.24, 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. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's children on March 13, 2025. These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 13, 2025 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee. These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee. Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts. Reporting person is the trustee of the Kenneth Duda Annuity Trusts. These shares are held by a family trust for which the reporting person is co-trustee. 1/48th of the shares subject to the option shall vest and become exercisable on June 1, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter.
Shares sold 58,000 shares Aggregate open-market sales on April 17, 2026
Options exercised 32,000 shares Non-qualified stock option exercise on April 17, 2026
Option exercise price $15.2625 per share Exercise price of non-qualified stock option
Direct holdings after transactions 43,652 shares Common stock directly held after April 17, 2026 trades
Children’s trust holdings 1,094,506 shares Common stock held by children’s trust after trades
Foundation holdings 501,986 shares Common stock held by 501(c) foundation after trades
Family trust holdings 201,134 shares Common stock held by family trust after trades
Rule 10b5-1 plans date March 13, 2025 Date trading plans were 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.
Non-Qualified Stock Option financial
"security_title: "Non-Qualified Stock Option (right to buy)""
A non-qualified stock option (NSO) is a contract that lets an employee or service provider buy company shares at a fixed price for a set period, like a voucher to purchase stock later at today’s price. It matters to investors because exercising NSOs creates ordinary income for the holder and can increase share count, affecting a company’s earnings and ownership mix; think of it as a future sale that can dilute existing shareholders and has immediate tax consequences for the recipient.
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.
501(c) Foundation regulatory
"These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee."
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
beneficial ownership regulatory
"shares but disclaims beneficial ownership of the shares."
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
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*
Duda Kenneth

(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
XOfficer (give title below)Other (specify below)
President and CTO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/17/2026
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 Stock04/17/2026M(1)32,000A$15.262544,976D
Common Stock04/17/2026S(1)1,324D$161.1808(2)43,652D
Common Stock04/17/2026S(1)9,892D$162.1464(3)33,760D
Common Stock04/17/2026S(1)6,410D$163.0981(4)27,350D
Common Stock04/17/2026S(1)9,592D$164.1796(5)17,758D
Common Stock04/17/2026S(1)4,782D$164.8584(6)12,976D
Common Stock04/17/2026S(7)662D$161.1808(2)1,094,506IBy Childrens' Trust(8)
Common Stock04/17/2026S(7)4,946D$162.1464(3)1,089,560IBy Childrens' Trust(8)
Common Stock04/17/2026S(7)3,205D$163.0981(4)1,086,355IBy Childrens' Trust(8)
Common Stock04/17/2026S(7)4,796D$164.1796(5)1,081,559IBy Childrens' Trust(8)
Common Stock04/17/2026S(7)2,391D$164.8584(6)1,079,168IBy Childrens' Trust(8)
Common Stock04/17/2026S(9)414D$161.1808(2)501,986IBy Foundation(10)
Common Stock04/17/2026S(9)3,091D$162.1464(3)498,895IBy Foundation(10)
Common Stock04/17/2026S(9)2,003D$163.0981(4)496,892IBy Foundation(10)
Common Stock04/17/2026S(9)2,998D$164.1796(5)493,894IBy Foundation(10)
Common Stock04/17/2026S(9)1,494D$164.8584(6)492,400IBy Foundation(10)
Common Stock702,147IBy GRAT JD(11)
Common Stock702,147IBy GRAT KD(12)
Common Stock201,134Iby Trust(13)
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
Non-Qualified Stock Option (right to buy)$15.262504/17/2026M(1)32,000 (14)04/12/2028Common Stock32,000$0.032,000D
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 March 13, 2025.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $160.53 to $161.50, 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 $161.59 to $162.57, 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 $162.59 to $163.589, 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 $163.5911 to $164.59, 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 $164.60 to $165.24, 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.
7. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's children on March 13, 2025.
8. These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.
9. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 13, 2025 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.
10. These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.
11. Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts.
12. Reporting person is the trustee of the Kenneth Duda Annuity Trusts.
13. These shares are held by a family trust for which the reporting person is co-trustee.
14. 1/48th of the shares subject to the option shall vest and become exercisable on June 1, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter.
By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Kenneth Duda04/21/2026
** 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)

FAQ

What insider transactions did ANET executive Kenneth Duda report on April 17, 2026?

Kenneth Duda reported exercising options for 32,000 Arista Networks (ANET) shares and related sales of 58,000 shares. The sales occurred through direct holdings, a family foundation, and a children’s trust in open‑market transactions under pre‑arranged Rule 10b5‑1 trading plans.

How many Arista Networks (ANET) shares did Kenneth Duda sell in this Form 4 filing?

Entities associated with Kenneth Duda sold an aggregate of 58,000 Arista Networks (ANET) shares. These open‑market sales were split among his direct holdings, a 501(c) foundation, and a children’s trust, and were executed at weighted average prices around $160–$165 per share.

What stock options did Kenneth Duda exercise in Arista Networks (ANET)?

Kenneth Duda exercised non‑qualified stock options covering 32,000 Arista Networks (ANET) shares at an exercise price of $15.2625 per share. The corresponding derivative line shows 32,000 underlying common shares remaining subject to the option after the transaction, with expiration on April 12, 2028.

How many Arista Networks (ANET) shares does Kenneth Duda hold directly after these transactions?

After the reported transactions, Kenneth Duda directly holds 43,652 Arista Networks (ANET) common shares. This direct position reflects the combined effect of his open‑market sales and the 32,000‑share option exercise disclosed in the Form 4 filing.

What indirect Arista Networks (ANET) holdings does Kenneth Duda report via trusts and a foundation?

Indirectly, Kenneth Duda reports 1,094,506 ANET shares held by a children’s trust, 501,986 shares held by a 501(c) foundation, 201,134 shares in a family trust, and 702,147 shares in each of the Kenneth and Jennifer Duda annuity trusts, with some positions accompanied by beneficial‑ownership disclaimers.

Were Kenneth Duda’s Arista Networks (ANET) share sales pre‑planned?

Yes. The filing states the exercise and sales, including those by the children’s trust and the 501(c) foundation, were effected under Rule 10b5‑1 trading plans entered into on March 13, 2025. Such pre‑arranged plans automate trades according to preset instructions.