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Ambarella, Inc.

TechnologyRussell 2000

Ambarella, Inc. insider trading

Ambarella, Inc. files with the SEC as a Semiconductors & Related Devices company headquartered in Santa Clara, CA. Every time one of its executives or directors buys or sells the stock, the filing appears here the moment it reaches the SEC — with grants and option exercises set apart from the trades that cost the insider their own money.

From SEC filings

Recent AMBA insider transactions

6 insiders traded AMBA on the open market between Mar 19, 2026 and Sep 18, 2026 — 24 sales worth $9.7M, of which 10 were pre-scheduled under a 10b5-1 plan.

Bought
—
Sold
$9.7M

10 of 24 on a 10b5-1 plan

Net
−$9.7M
Insiders
6

Open-market purchases (code P) and sales (code S) from Ambarella, Inc.'s own SEC Form 4 filings. Grants and option exercises are excluded — they are compensation, not decisions. Share counts are derived from the reported value and price. Verify any figure against the original filing before acting on it; this is monitoring, not advice.

Filing history last read from EDGAR on Sep 22, 2026. The live dashboard shows new filings the moment they clear.

Every AMBA Form 4 on SEC.gov

SEC Form 4 data, Q3 2024 to Q2 2026

AMBA insider trading by quarter

Between Jul 01, 2024 and Jun 30, 2026, 10 insiders traded AMBA on the open market: 0 purchases and 103 sales worth $23.8M, 15 of the sales pre-scheduled under a 10b5-1 plan. In the last four quarters alone: 0 purchases and 44 sales ($16.1M), by 8 insiders.

QuarterBoughtSold
Q2 2026—−$4.9M12 sales · 8 on a plan
Q1 2026—−$6.4M14 sales · 5 on a plan
Q4 2025—−$3.1M12 sales
Q3 2025—−$1.7M6 sales
Q2 2025—−$683.3K7 sales · 1 on a plan
Q1 2025—−$2.2M24 sales
Q4 2024—−$1.7M15 sales
Q3 2024—−$3.1M13 sales · 1 on a plan
Largest sale
−$2M of AMBA by Wang Feng-Ming (CEO · Director) on Mar 02, 2026, under a 10b5-1 plan.

Open-market transactions through Jun 30, 2026most recent first

  • Wang Feng-Ming10b5-1

    CEO · Director

    −$1.6M

    May 26, 2026

    17,285 sh · $90.38

  • Wang Feng-Ming10b5-1

    CEO · Director

    −$842.3K

    May 26, 2026

    9,150 sh · $92.05

  • Wang Feng-Ming10b5-1

    CEO · Director

    −$553.3K

    May 26, 2026

    6,065 sh · $91.23

  • Wang Feng-Ming

    CEO · Director

    −$1M

    Mar 17, 2026

    18,976 sh · $52.77

  • Lee Chan W

    Chief Operations Officer

    −$355.1K

    Mar 17, 2026

    6,729 sh · $52.77

  • Ju Chi-Hong

    Senior VP, Systems & GM, Asia

    −$249.5K

    Mar 17, 2026

    4,729 sh · $52.77

  • Young John Alexander

    CFO

    −$241.5K

    Mar 17, 2026

    4,577 sh · $52.77

  • Wang Feng-Ming10b5-1

    CEO · Director

    −$2M

    Mar 02, 2026

    32,460 sh · $60.91

  • Wang Feng-Ming10b5-1

    CEO · Director

    −$739.5K

    Mar 02, 2026

    12,040 sh · $61.42

  • Wang Feng-Ming10b5-1

    CEO · Director

    −$154.8K

    Mar 02, 2026

    2,600 sh · $59.53

  • Wang Feng-Ming10b5-1

    CEO · Director

    −$111.7K

    Mar 02, 2026

    1,900 sh · $58.77

  • Wang Feng-Ming10b5-1

    CEO · Director

    −$56.8K

    Mar 02, 2026

    1,000 sh · $56.83

  • Ju Chi-Hong

    Senior VP, Systems & GM, Asia

    −$584.1K

    Jan 05, 2026

    7,728 sh · $75.58

  • Ju Chi-Hong

    Senior VP, Systems & GM, Asia

    −$558.1K

    Dec 30, 2025

    7,945 sh · $70.25

  • Ju Chi-Hong

    Senior VP, Systems & GM, Asia

    −$264.8K

    Dec 30, 2025

    3,765 sh · $70.32

From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.

Ambarella, Inc. company record

SEC industry classification
Semiconductors & Related Devices
Headquarters
Santa Clara, CA
Listed on
Nasdaq
SEC Central Index Key
0001280263

Sourced from this company's own SEC submissions record. The industry label is SEC's Standard Industrial Classification, which is more specific than the Technology sector shown above.

After insiders bought AMBA

What the stock actually did in the 90 days following each open-market purchase

Don't check AMBA — let it ping you

Get told the moment an insider moves on AMBA

Pro watches Ambarella, Inc. for you and sends a Telegram ping within moments of a Form 4 clearing EDGAR — a C-suite open-market buy, a cluster, a 10b5-1 regime break — long before it reaches the press. Add AMBA to a watchlist, see each mover's benchmark-measured track record and which legendary funds hold it, and read the full filing history instead of the last 72 hours.

Track AMBA on the live dashboardFilings on SEC.gov

The live dashboard is free to open. Alerts, watchlists, full filing history and each mover's benchmark-measured track record are Pro. Monitoring, not advice.

How to read AMBA insider activity

Open-market purchase (code P)
An insider spending their own money at market price. This is the only buy code that reliably carries signal — it is a decision, not compensation.
Grants and option exercises (codes A, M)
Scheduled compensation. Most "insider buying" headlines are really this, which is why InsiderPulse weights it at a fraction of a real purchase.
Cluster buy
Two or more different insiders buying on the open market in the same window. One executive buying can mean anything; three is much harder to explain away.

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This week on the tape: who actually chose to sellThe weekly split of scheduled 10b5-1 selling vs deliberate sales, with the deciders named.

Questions

Are AMBA insiders buying or selling?
Between Mar 19, 2026 and Sep 18, 2026, 6 Ambarella, Inc. insiders made no open-market purchases and 24 sales worth $9.7M, a net sale of $9.7M. 10 of the sales were pre-scheduled under a Rule 10b5-1 plan.
How much AMBA stock have insiders bought and sold in the last two years?
Between Jul 01, 2024 and Jun 30, 2026, 10 Ambarella, Inc. insiders made no open-market purchases and 103 sales worth $23.8M. 15 of the sales were pre-scheduled under a Rule 10b5-1 plan. In the four quarters to Jun 30, 2026: no purchases and 44 sales ($16.1M). The largest sale was Wang Feng-Ming selling $2M on Mar 02, 2026.
What was the largest recent AMBA insider trade?
Wang Feng-Ming (CEO · Director) sold $1.6M of AMBA stock on May 26, 2026 at about $90.38 a share, under a pre-scheduled 10b5-1 plan.
When did an insider last buy AMBA shares?
No open-market purchase by a Ambarella, Inc. insider appears in the filings from Mar 19, 2026 to Sep 18, 2026 — every recorded open-market transaction in that period was a sale.
Where does AMBA insider trading data come from?
From the Form 4 filings Ambarella, Inc.'s officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.

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