What the executives and directors of Arista Networks actually did with their own shares, decoded from their SEC Form 4 filings. Each figure says the stretch of time it covers.

The tape: three years of insider trades

Every marker sits at the price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the grey strip is the routine flow (grants, vestings, tax withholding and gifts) that a headline gets wrong by counting it as selling. The share count changed 4-for-1 on Nov 18, 2021 and 4-for-1 on Dec 6, 2024, so prices and share counts reported before then are restated to today's basis here; otherwise the tape would show a step the shares never took.

The 204 routine events on the chart, as a list

Date	Insider	Shares
Aug 20, 2026	TEMPLETON MARK B	538
Aug 20, 2026	CHEW LEWIS	538
Aug 20, 2026	Giancarlo Charles H	538
Aug 20, 2026	Scheinman Daniel	538
Aug 20, 2026	Duda Kenneth	64K
Aug 20, 2026	Ullal Jayshree	42K
Aug 20, 2026	Wassenaar Yvonne	538
Aug 20, 2026	Battles Kelly Bodnar	538
Aug 20, 2026	Breithaupt Chantelle Yvette	18K
Aug 20, 2026	Nightingale Todd	190K
Aug 20, 2026	Lavender Robert G	538
Jul 20, 2026	Duda Kenneth	17K
Jun 22, 2026	Duda Kenneth	17K
Jun 4, 2026	BECHTOLSHEIM ANDREAS	158K
May 20, 2026	Duda Kenneth	79K
May 20, 2026	TEMPLETON MARK B	971
May 20, 2026	CHEW LEWIS	971
May 20, 2026	Giancarlo Charles H	971
May 20, 2026	Scheinman Daniel	971
May 20, 2026	Ullal Jayshree	42K
May 20, 2026	Wassenaar Yvonne	971
May 20, 2026	Battles Kelly Bodnar	971
May 20, 2026	Breithaupt Chantelle Yvette	18K
May 20, 2026	Lavender Robert G	807
Apr 17, 2026	Duda Kenneth	32K
Mar 17, 2026	Duda Kenneth	32K
Feb 20, 2026	Duda Kenneth	196K
Feb 20, 2026	TEMPLETON MARK B	971
Feb 20, 2026	CHEW LEWIS	971
Feb 20, 2026	Giancarlo Charles H	971
Feb 20, 2026	Scheinman Daniel	971
Feb 20, 2026	Ullal Jayshree	336K
Feb 20, 2026	Wassenaar Yvonne	971
Feb 20, 2026	Battles Kelly Bodnar	971
Feb 20, 2026	Breithaupt Chantelle Yvette	63K
Feb 20, 2026	Nightingale Todd	15K
Feb 20, 2026	Lavender Robert G	808
Jan 20, 2026	Duda Kenneth	30K
Dec 17, 2025	Duda Kenneth	30K
Nov 20, 2025	Duda Kenneth	83K
Nov 20, 2025	TEMPLETON MARK B	971
Nov 20, 2025	CHEW LEWIS	971
Nov 20, 2025	Giancarlo Charles H	971
Nov 20, 2025	Scheinman Daniel	971
Nov 20, 2025	Ullal Jayshree	72K
Nov 20, 2025	Wassenaar Yvonne	971
Nov 20, 2025	Battles Kelly Bodnar	971
Nov 20, 2025	Breithaupt Chantelle Yvette	16K
Nov 20, 2025	Lavender Robert G	807
Nov 14, 2025	Ullal Jayshree	935K
Oct 17, 2025	Duda Kenneth	30K
Sep 17, 2025	Duda Kenneth	30K
Aug 20, 2025	Duda Kenneth	53K
Aug 20, 2025	Wassenaar Yvonne	1,971
Aug 20, 2025	TEMPLETON MARK B	971
Aug 20, 2025	CHEW LEWIS	971
Aug 20, 2025	Giancarlo Charles H	971
Aug 20, 2025	Scheinman Daniel	971
Aug 20, 2025	Ullal Jayshree	72K
Aug 20, 2025	Battles Kelly Bodnar	971

The 60 most recent of 204.

Where the shares went, last 12 months

Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price. The share count changed 4-for-1 on Nov 18, 2021 and 4-for-1 on Dec 6, 2024, so share counts reported before then are restated to today's basis here.

The chart, in numbers

Flow	Shares
From holdings	6.8M
Vested / exercised	1.2M
Other in	880K
Withheld for tax	373K
Planned sales (10b5-1)	6.7M
Gifts	935K
Other out	941K

Skin in the game

Directly held shares as reported after each trade, indexed to 100 at the start of the window, up to five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades. The share count changed 4-for-1 on Nov 18, 2021 and 4-for-1 on Dec 6, 2024, so share counts reported before then are restated to today's basis here.

The chart, in numbers

Insider	Start of the window	Latest reported	Indexed, start = 100
BECHTOLSHEIM ANDREAS	326K	0	0
Duda Kenneth	58K	13K	22.4
Giancarlo Charles H	195K	1,509	0.8
Scheinman Daniel	150K	159K	106

“Since trade” compares with the latest insider-implied price, not a market quote: these pages are built from filings alone. A role here is the one on that day's Form 4, so somebody promoted since appears under both titles. The share count changed 4-for-1 on Nov 18, 2021 and 4-for-1 on Dec 6, 2024. This table prints prices and share counts as they were filed, on the basis of the day, while the charts above are on today's; “Since trade” puts the filed price on today's basis first, which is why it does not divide into the price beside it.

Filing hygiene

How to read this

A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.

Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.

Every number on this page comes from Forms 3, 4 and 5 filed with the SEC. The insider export runs on its own schedule, so it can be a few days behind the rest of the site; the date below says how far it goes. Browse the source filings on SEC EDGAR. Data through Sep 18, 2026