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Arista Networks (NYSE: ANET) executive sells 43K shares

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Arista Networks, Inc. (ANET) reported insider transactions by President and CTO Kenneth Duda involving option and restricted stock unit conversions and related share sales on August 20, 2026. Duda exercised derivatives for 52,507 shares of common stock and, in a series of open-market transactions (including through a children's trust and a 501(c) foundation), sold 43,333 shares at weighted-average prices around the mid‑$180s per share. A family trust withheld 15,541 shares to satisfy tax obligations upon RSU vesting. The filing also shows indirect holdings after these events of 757,755 shares held by GRAT JD and 756,272 shares held by GRAT KD. The option exercises and many sales were effected under Rule 10b5-1 trading plans entered into on March 11, 2026.

Positive

  • None.

Negative

  • None.
Insider Duda Kenneth
Role President and CTO
Sold 43,333 shs ($8.03M)
Approx. gross sale proceeds $8.03M
Approx. exercise cost $260K
Type Security Shares Price Value
Exercise Non-Qualified Stock Option (right to buy) F1, F15 3,999 $0.00 $0.00
Exercise Non-Qualified Stock Option (right to buy) F1, F16 13,334 $0.00 $0.00
Exercise Restricted Stock Unit - 17 F10, F17 1,350 $0.00 $0.00
Exercise Restricted Stock Unit-11 F10, F18 4,148 $0.00 $0.00
Exercise Restricted Stock Unit-11 F10, F18 4,148 $0.00 $0.00
Exercise Restricted Stock Unit-13 F10, F19 1,832 $0.00 $0.00
Exercise Restricted Stock Unit-14 F10, F20 19,816 $0.00 $0.00
Exercise Restricted Stock Unit-8 F10, F21 3,880 $0.00 $0.00
Exercise Common Stock F1 13,334 $15.2769 $204K
Exercise Common Stock F1 3,999 $14.1463 $57K
Sale Common Stock F1, F2 4,197 $184.3297 $774K
Sale Common Stock F1, F3 5,750 $185.1821 $1.06M
Sale Common Stock F1, F4 6,568 $186.1257 $1.22M
Sale Common Stock F1, F5 818 $186.9698 $153K
Sale Common Stock F6, F2, F7 3,875 $184.3297 $714K
Sale Common Stock F6, F3, F7 5,308 $185.1821 $983K
Sale Common Stock F6, F4, F7 6,063 $186.1257 $1.13M
Sale Common Stock F6, F5, F7 754 $186.9698 $141K
Sale Common Stock F8, F2, F9 2,422 $184.3297 $446K
Sale Common Stock F8, F3, F9 3,317 $185.1821 $614K
Sale Common Stock F8, F4, F9 3,789 $186.1257 $705K
Sale Common Stock F8, F5, F9 472 $186.9698 $88K
Exercise Common Stock F10, F11 3,880 $0.00 $0.00
Exercise Common Stock F10, F11 4,148 $0.00 $0.00
Exercise Common Stock F10, F11 1,832 $0.00 $0.00
Exercise Common Stock F10, F11 19,816 $0.00 $0.00
Exercise Common Stock F10, F11 1,350 $0.00 $0.00
Tax Withholding Common Stock F12, F11 15,541 $186.45 $2.90M
holding Common Stock F13 -- -- --
holding Common Stock F14 -- -- --
Holdings After Transaction: Non-Qualified Stock Option (right to buy) — 156,001 shares (Direct); Restricted Stock Unit - 17 — 17,550 shares (Direct); Restricted Stock Unit-11 — 16,588 shares (Direct); Restricted Stock Unit-13 — 16,516 shares (Direct); Restricted Stock Unit-14 — 317,056 shares (Direct); Restricted Stock Unit-8 — 3,884 shares (Direct); Common Stock — 12,976 shares (Direct); Common Stock — 1,015,168 shares (Indirect, By Childrens' Trust); Common Stock — 452,400 shares (Indirect, By Foundation); Common Stock — 122,375 shares (Indirect, by Trust); Common Stock — 757,755 shares (Indirect, By GRAT JD); Common Stock — 756,272 shares (Indirect, By GRAT KD)
Footnotes (21)
  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 March 11, 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 $183.72 to $184.7176, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.72 to $185.719, 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. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.7311 to $186.7213, 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 $186.7331 to $187.16, 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 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 11, 2026.
  7. F7. 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.
  8. F8. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2026 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.
  9. F9. These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.
  10. F10. Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
  11. F11. These shares are held by a family trust for which the reporting person is co-trustee.
  12. F12. Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.
  13. F13. Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts.
  14. F14. Reporting person is the trustee of the Kenneth Duda Annuity Trusts.
  15. F15. 1/48th of the shares subject to the option shall vest and become exercisable on December 1, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter.
  16. F16. 1/48th of the shares subject to the option shall vest and become exercisable on December 1, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter.
  17. F17. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2026 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
  18. F18. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on on February 20, 2024 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
  19. F19. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
  20. F20. Five percent (5%) of the restricted stock awarded vested on November 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
  21. F21. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2023 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
Total shares sold 43,333 shares SellShares in transactionSummary for August 20, 2026 transactions
Shares from derivative exercises 52,507 shares ExerciseShares in transactionSummary for option and RSU exercises
Shares withheld for taxes 15,541 shares at $186.4500 per share Code F transaction for tax withholding on RSU vesting
Sample sale price tranche 6,568 shares at $186.1257 per share One open‑market sale of common stock on August 20, 2026
Option exercise price $15.2769 per share Conversion or exercise price for 13,334-share non-qualified stock option
Indirect holdings by GRAT JD 757,755 shares Common stock held indirectly by GRAT JD after reported transactions
Indirect holdings by GRAT KD 756,272 shares Common stock held indirectly by GRAT KD after reported transactions
RSU vesting rate 6.25% per quarterly vest date Vesting schedule for several restricted stock unit awards
Rule 10b5-1 trading plan regulatory
"The exercise and/or sale of shares 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.
restricted stock unit financial
"Each restricted stock unit represents a contingent right to receive one share"
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
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.
grantor retained annuity trust (GRAT) financial
"By GRAT JD and By GRAT KD in the ownership nature descriptions"

FAQ

What did ANET executive Kenneth Duda report in this Form 4?
Kenneth Duda reported option and RSU exercises for 52,507 shares of Arista Networks, Inc. common stock and related sales of 43,333 shares (direct and indirect) on August 20, 2026, plus 15,541 shares withheld to cover tax obligations on RSU vesting.

How many ANET shares did Kenneth Duda sell on August 20, 2026?
The filing’s transaction summary shows total sellShares of 43,333 shares of Arista Networks, Inc. common stock sold on August 20, 2026, across multiple open‑market transactions by Duda, a children’s trust, and a 501(c) foundation.

At what prices were Kenneth Duda’s ANET share sales executed?
Reported per‑share prices include weighted averages of $184.3297, $185.1821, $186.1257, and $186.9698. Footnotes state these are weighted averages for multiple trades within price ranges between about $183.72 and $187.16.

Were Kenneth Duda’s ANET transactions under a Rule 10b5-1 plan?
Yes. Footnotes state that the option exercises and certain sales, including sales for the benefit of his children and a 501(c) foundation, were effected pursuant to Rule 10b5-1 trading plans entered into on March 11, 2026.

How many ANET shares were withheld for Kenneth Duda’s tax obligations?
A transaction coded F reports 15,541 shares of Arista Networks, Inc. common stock withheld at a price of $186.45 per share, with a footnote explaining these shares were withheld to satisfy tax withholding obligations on the vesting of restricted stock units.

What indirect ANET holdings by Kenneth Duda are disclosed?
The filing lists indirect holdings of 757,755 shares of Arista Networks, Inc. common stock held by GRAT JD and 756,272 shares held by GRAT KD, in addition to trusts for children and a family trust referenced in the footnotes.

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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*
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)
08/20/2026		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 Stock08/20/2026M(1)13,334A$15.276926,310D
Common Stock08/20/2026M(1)3,999A$14.146330,309D
Common Stock08/20/2026S(1)4,197D$184.3297(2)26,112D
Common Stock08/20/2026S(1)5,750D$185.1821(3)20,362D
Common Stock08/20/2026S(1)6,568D$186.1257(4)13,794D
Common Stock08/20/2026S(1)818D$186.9698(5)12,976D
Common Stock08/20/2026S(6)3,875D$184.3297(2)1,027,293IBy Childrens' Trust(7)
Common Stock08/20/2026S(6)5,308D$185.1821(3)1,021,985IBy Childrens' Trust(7)
Common Stock08/20/2026S(6)6,063D$186.1257(4)1,015,922IBy Childrens' Trust(7)
Common Stock08/20/2026S(6)754D$186.9698(5)1,015,168IBy Childrens' Trust(7)
Common Stock08/20/2026S(8)2,422D$184.3297(2)459,978IBy Foundation(9)
Common Stock08/20/2026S(8)3,317D$185.1821(3)456,661IBy Foundation(9)
Common Stock08/20/2026S(8)3,789D$186.1257(4)452,872IBy Foundation(9)
Common Stock08/20/2026S(8)472D$186.9698(5)452,400IBy Foundation(9)
Common Stock08/20/2026M3,880A$0.0(10)110,770Iby Trust(11)
Common Stock08/20/2026M4,148A$0.0(10)114,918Iby Trust(11)
Common Stock08/20/2026M1,832A$0.0(10)116,750Iby Trust(11)
Common Stock08/20/2026M19,816A$0.0(10)136,566Iby Trust(11)
Common Stock08/20/2026M1,350A$0.0(10)137,916Iby Trust(11)
Common Stock08/20/2026F(12)15,541D$186.45122,375Iby Trust(11)
Common Stock757,755IBy GRAT JD(13)
Common Stock756,272IBy GRAT KD(14)
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)$14.146308/20/2026M(1)3,999 (15)02/07/2029Common Stock3,999$0.0156,001D
Non-Qualified Stock Option (right to buy)$15.276908/20/2026M(1)13,334 (16)11/08/2028Common Stock13,334$0.00D
Restricted Stock Unit - 17$0.0(10)08/20/2026M1,350 (17) (17)Common Stock1,350$0.017,550D
Restricted Stock Unit-11$0.0(10)08/20/2026M4,148 (18) (18)Common Stock4,148$0.020,736D
Restricted Stock Unit-11$0.0(10)08/20/2026M4,148 (18) (18)Common Stock4,148$0.016,588D
Restricted Stock Unit-13$0.0(10)08/20/2026M1,832 (19) (19)Common Stock1,832$0.016,516D
Restricted Stock Unit-14$0.0(10)08/20/2026M19,816 (20) (20)Common Stock19,816$0.0317,056D
Restricted Stock Unit-8$0.0(10)08/20/2026M3,880 (21) (21)Common Stock3,880$0.03,884D
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 11, 2026.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.72 to $184.7176, 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 $184.72 to $185.719, 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 $185.7311 to $186.7213, 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 $186.7331 to $187.16, 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 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 11, 2026.
7. 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.
8. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2026 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.
9. These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.
10. Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
11. These shares are held by a family trust for which the reporting person is co-trustee.
12. Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.
13. Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts.
14. Reporting person is the trustee of the Kenneth Duda Annuity Trusts.
15. 1/48th of the shares subject to the option shall vest and become exercisable on December 1, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter.
16. 1/48th of the shares subject to the option shall vest and become exercisable on December 1, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter.
17. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2026 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
18. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on on February 20, 2024 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
19. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
20. Five percent (5%) of the restricted stock awarded vested on November 20, 2025 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
21. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2023 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.
By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Kenneth Duda08/24/2026
** 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