Insider trade

Director sold ~$643K of ANET shares in the open market

Traded Dec 17, 2025 · Filed Dec 20, 2025

~$643K
Reported value · 5,255 sh @ $122.4343: 537K
Holds after · shares reported: +69.1%
stock since the trade · S&P 500 +15.4%, $122.36 → $206.90 on Oct 5

Why it stands out

A board member of Arista Networks sold $643K of Arista Networks shares. It was planned long ago, so it says very little.

Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell

View the official recordSEC Form 4 — Statement of Changes in Beneficial Ownership

All the details

Dates, kept separate

Transaction date: Dec 17, 2025
Reporting period: Not applicable
Filed with the SEC: Dec 20, 2025

DirectorIndirect holding$500K–$1MPre-arranged plan referenced

Context

Classification

open market sale

Code S — open-market or private sale

Absolute commitment

~$643,392

Shares × reported transaction price

Timing vs results

43 days after results of Nov 4, 2025, 57 days before results of Feb 12, 2026

Results dates are the company's own 8-K (Item 2.02). Many companies only let insiders trade in a window after results

Price at the time

Closed at $122.36 on Dec 17, 2025, 90% above its 52-week low and 24% below its high, after a 20% drop over the previous 30 trading days

52-week range $64.37 (Apr 4, 2025) to $162.03 (Oct 29, 2025), 59% of the way up, from 250 adjusted closes. 30 trading days earlier: $153.55 on Nov 4, 2025. Describes the past only, not a forecast

Planned / mechanical clue

Footnote references a pre-arranged trading plan (Rule 10b5-1)

Only flagged when a footnote says so; never inferred

After it was reported

After	Stock	S&P 500	Difference
7 days	+2.6%	+0.4%	+2.2%
30 days	-2.6%	+0.1%	-2.7%
90 days	+3.9%	-4.3%	+8.2%
180 days	+33.5%	+8.7%	+24.8%

Past results only. Not a forecast.

Source receipt

Record ID: 0001596532-25-000324
Filed / recorded: Dec 20, 2025, 12:10 AM UTC
Added to OQRO: Oct 2, 2026, 12:27 PM UTC
Parser: form4-xml-v1
Data quality: Verified: identifiers matched exactly
Issuer: Arista Networks, Inc.
Issuer CIK: 1596532
Ticker: ANET
Reporting person: Kenneth Duda
Relationship: Director, Officer
Officer title: President and CTO
Security: Common Stock
Table: Non-derivative (Table I)
Transaction date: Dec 17, 2025
Transaction code: S
Shares / units: 5,255
Price per share: $122.4343
Acquired / disposed: Disposed (D)
Shares owned after: 537,145
Ownership form: Indirect — By Foundation
Amendment: No

Footnotes from the filing

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.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $121.82 to $122.81, 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 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.