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Ambarella Inc. insider trading

In twelve months insiders at Ambarella bought nothing and sold $16.6M on the open market; 16 of the 43 sales were under plans set months before.

Bought on the open marketNonein twelve months
Sold on the open market$16.6M43 sales
Sales set in advance16 of 43under Rule 10b5-1 plans
Pay taken in stockNone
New to this? How to read this page
  1. Insiders are the people who run the company: officers, directors and owners of 10% or more. They must report a trade on Form 4 within two business days.
  2. A purchase on the open market is the strongest sign: the insider spent their own money.
  3. A sale under a trading plan (Rule 10b5-1) says little: its dates were fixed months before. Sales outside a plan say more, but insiders sell for many reasons, such as taxes or a house.
  4. Grants, option exercises and shares held back for tax are left out.
  5. What is a Form 4? · Form 4 codes

What kind of trades

Insiders only sold: 43 sales worth $16.6M, and 16 of them were under plans set months before, which say little.

Purchasebought with their own money
Pay in stock, own choiceowed cash, chose shares
Sale outside a planthe insider picked the day
Sale under a plandates fixed months before
Says littlecompany plans, board pay, cash units
Bought
none
Sold
27 outside a plan16 under a plan

Every Form 4 line of the last twelve months, counted by kind. The grades come from the filing itself: whether the insider paid cash, whether a plan set the date, whether pay was taken in stock by choice.

Insider trades on the share price

last twelve months

36 marks over twelve months, each in its grade: solid for the stronger signs, hollow or grey for the ones that say little.

PurchasePay in stock, own choiceSale outside a planSale under a planSays little

The blue line is the daily close over twelve months. Each mark is one insider's trades on one day, on that day's price, sized by dollar value. Solid marks are the stronger signs; hollow and grey marks say little. Hover or tap a mark for who, how much and why.

Trades worth a closer look

A purchase stands out when two or more of these hold: a senior insider, several insiders buying within 90 days, a fall of 10% or more in the three months before, or over $1 million. A sale outside a plan is judged the same way. These are the Feed's rules.

Who traded

dollars, twelve months

7 insiders traded. The most: Wang Feng-Ming, sale outside a plan $2.6M; sale under a plan $7.5M.

One row per insider, sold to the left and bought to the right, split by grade: the paler part of a bar is the part that says little.

How it compares

every company on the site

Open-market sales, twelve months

Open-market purchases, twelve months

    The bar ranks every company on the site from the lowest on the left to the highest on the right, in three equal thirds; the small figures under it are the values where each third starts, and the black tick is the middle company. The orange dot is this company; the grey ticks are the other companies in its industry (hover or tap for names). A hatched block is companies tied at none.

    Every Form 4 line

    Purchase: bought on the open market with their own moneyTook pay in stock, own choice: owed cash, chose shares instead; a softer signSale: sold on the open market, not under a plan set in advanceSale, trading plan: under a Rule 10b5-1 plan set up months before, so the date was fixed in advanceGrey lines: plan purchases, pay in stock taken by the whole board or under a company plan, and units paid in cash; they say little about the insider's own view
    TradedInsiderRoleTypeSharesPriceValueFiling
    25 September 2026Paisley Christopher BDirectorSaletrading plan set in advance · Form 144 notice 25 September 2026250$70.76$17,690Form 4
    18 September 2026Young John AlexanderCFOSaletrading plan set in advance · Form 144 notice 18 September 20261,896$67.28$127,563Form 4
    17 September 2026Wang Feng-MingCEOSaleafter a 4% fall over three months · 30% below its one-year high · Form 144 notice 1 July 20266,086$64.83$394,555Form 4
    17 September 2026Ju Chi-HongSenior VP, Systems & GMSaleafter a 4% fall over three months · 30% below its one-year high · Form 144 notice 1 July 20262,009$64.83$130,243Form 4
    17 September 2026Lee Chan WChief Operations OfficerSaleafter a 4% fall over three months · 30% below its one-year high2,893$64.83$187,553Form 4
    17 September 2026Young John AlexanderCFOSaleafter a 4% fall over three months · 30% below its one-year high · Form 144 notice 18 September 20263,126$64.83$202,659Form 4
    9 July 2026Chen Yun-LungVP, Business Dev. & MarketingSaleafter a 47% rise over three months · 18% below its one-year high · Form 144 notice 9 July 20265,958$78.66$468,656Form 4
    1 July 2026Ju Chi-HongSenior VP, Systems & GMSaleafter a 73% rise over three months · 8% below its one-year high · Form 144 notice 1 July 202610,000$88.84$888,400Form 4
    1 July 2026Wang Feng-MingCEOSaletrading plan set in advance · Form 144 notice 1 July 202616,250$90.08$1.5 millionForm 4
    26 June 2026Paisley Christopher BDirectorSaletrading plan set in advance · Form 144 notice 26 June 2026250$62.01$15,502Form 4
    17 June 2026Young John AlexanderCFOSaletrading plan set in advance · Form 144 notice 17 June 20263,186$67.87$216,234Form 4
    17 June 2026Young John AlexanderCFOSaletrading plan set in advance · Form 144 notice 17 June 20261,847$66.98$123,712Form 4
    17 June 2026Lee Chan WChief Operations OfficerSaleafter a 22% rise over three months · 31% below its one-year high2,951$67.87$200,284Form 4
    17 June 2026Ju Chi-HongSenior VP, Systems & GMSaleafter a 22% rise over three months · 31% below its one-year high2,017$67.87$136,894Form 4
    17 June 2026Wang Feng-MingCEOSaleafter a 22% rise over three months · 31% below its one-year high · Form 144 notice 26 May 20266,204$67.87$421,065Form 4
    12 June 2026Chen Yun-LungVP, Business Development andSaleafter a 30% rise over three months · 29% below its one-year high · Form 144 notice 12 June 20269,856$67.06$660,943Form 4
    26 May 2026Young John AlexanderCFOSaletrading plan set in advance · Form 144 notice 26 May 2026400$96.00$38,400Form 4
    26 May 2026Wang Feng-MingCEOSaletrading plan set in advance · Form 144 notice 26 May 202617,285$90.38$1.6 millionForm 4
    26 May 2026Wang Feng-MingCEOSaletrading plan set in advance · Form 144 notice 26 May 20266,065$91.23$553,306Form 4
    26 May 2026Wang Feng-MingCEOSaletrading plan set in advance · Form 144 notice 26 May 20269,150$92.05$842,246Form 4
    21 April 2026Young John AlexanderCFOSaletrading plan set in advance · Form 144 notice 21 April 20261,971$60.00$118,260Form 4
    19 March 2026Young John AlexanderCFOSaleafter a 21% fall over three months · 42% below its one-year high3,038$54.14$164,477Form 4
    19 March 2026Lee Chan WChief Operations OfficerSaleafter a 21% fall over three months · 42% below its one-year high3,641$54.14$197,124Form 4
    19 March 2026Ju Chi-HongSenior VP, Systems & GM, AsiaSaleafter a 21% fall over three months · 42% below its one-year high · Form 144 notice 5 January 20262,155$54.14$116,672Form 4
    19 March 2026Wang Feng-MingCEOSaleafter a 21% fall over three months · 42% below its one-year high · Form 144 notice 2 March 20268,083$54.14$437,614Form 4
    17 March 2026Young John AlexanderCFOSaleafter a 27% fall over three months · 45% below its one-year high · Form 144 notice 18 December 20254,577$52.77$241,528Form 4
    17 March 2026Lee Chan WChief Operations OfficerSaleafter a 27% fall over three months · 45% below its one-year high6,729$52.77$355,089Form 4
    17 March 2026Ju Chi-HongSenior VP, Systems & GM, AsiaSaleafter a 27% fall over three months · 45% below its one-year high · Form 144 notice 5 January 20264,729$52.77$249,549Form 4
    17 March 2026Wang Feng-MingCEOSaleafter a 27% fall over three months · 45% below its one-year high · Form 144 notice 2 March 202618,976$52.77$1.0 millionForm 4
    2 March 2026Wang Feng-MingCEOSaletrading plan set in advance · Form 144 notice 2 March 20261,000$56.83$56,832Form 4
    2 March 2026Wang Feng-MingCEOSaletrading plan set in advance · Form 144 notice 2 March 20261,900$58.77$111,663Form 4
    2 March 2026Wang Feng-MingCEOSaletrading plan set in advance · Form 144 notice 2 March 20262,600$59.53$154,770Form 4
    2 March 2026Wang Feng-MingCEOSaletrading plan set in advance · Form 144 notice 2 March 202632,460$60.91$2.0 millionForm 4
    2 March 2026Wang Feng-MingCEOSaletrading plan set in advance · Form 144 notice 2 March 202612,040$61.42$739,540Form 4
    5 January 2026Ju Chi-HongSenior VP, Systems & GM, AsiaSaleafter a 10% fall over three months · 19% below its one-year high · Form 144 notice 5 January 20267,728$75.58$584,105Form 4
    30 December 2025Ju Chi-HongSenior VP, Systems & GM, AsiaSaleafter a 15% fall over three months · 27% below its one-year high · Form 144 notice 30 December 20253,765$70.32$264,755Form 4
    26 December 2025Paisley Christopher BDirectorSaleafter a 14% fall over three months · 25% below its one-year high500$72.18$36,090Form 4
    18 December 2025Young John AlexanderCFOSaleafter a 15% fall over three months · 26% below its one-year high · Form 144 notice 18 December 20253,791$72.96$276,591Form 4
    17 December 2025Young John AlexanderCFOSaleafter a 12% fall over three months · 27% below its one-year high · Form 144 notice 18 December 20252,579$71.82$185,224Form 4
    17 December 2025Lee Chan WChief Operations OfficerSaleafter a 12% fall over three months · 27% below its one-year high2,406$71.82$172,799Form 4
    17 December 2025Ju Chi-HongSenior VP, Systems & GM, AsiaSaleafter a 12% fall over three months · 27% below its one-year high1,342$71.82$96,382Form 4
    17 December 2025Wang Feng-MingCEOSaleafter a 12% fall over three months · 27% below its one-year high4,950$71.82$355,509Form 4
    16 December 2025Schwarting Elizabeth MDirectorSaleafter a 9% fall over three months · 25% below its one-year high · Form 144 notice 16 December 2025624$72.38$45,163Form 4
    A filing with several lines appears once per line.
    Read morePay taken in stock by the insider's own choice has the filing's footnote, word for word, in the note under it; for the others, hold the pointer on the type. An award filed at no price shows n/a.