Ambarella, Inc. (AMBA) Insider Trading

Over the last 3 months, AMBA insiders made 0 open-market buys and 13 sales, a net sale of -$5.9M (SEC Form 4). Over the last 6 months, 233 institutions increased and 210 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
13
Net (3m)
-$5.9M
Insider trades by month Buys Sells
Oct
Dec
Jan
Mar
Apr
May
Context3-month price +30%Institutions mixed (13F)
DateInsiderTypeSharesPrice
May 28, 2026Wang Feng-Mingdirector, officer: CEOSell9,150$92.05
May 28, 2026Young John Alexanderofficer: CFOOption400$55.80
May 28, 2026Wang Feng-Mingdirector, officer: CEOSell17,285$90.38
May 28, 2026Wang Feng-Mingdirector, officer: CEOSell6,065$91.23
May 28, 2026Young John Alexanderofficer: CFOSell400$96.00
Apr 22, 2026Young John Alexanderofficer: CFOSell1,971$60.00
Mar 19, 2026Lee Chan Wofficer: Chief Operations OfficerSell3,641$54.14
Mar 19, 2026Young John Alexanderofficer: CFOGrant5,560
Mar 19, 2026Young John Alexanderofficer: CFOSell4,577$52.77
Mar 19, 2026Ju Chi-Hongofficer: Senior VP, Systems & GM, AsiaSell4,729$52.77
Mar 19, 2026Wang Feng-Mingdirector, officer: CEOSell18,976$52.77
Mar 19, 2026Ju Chi-Hongofficer: Senior VP, Systems & GM, AsiaSell2,155$54.14
Mar 19, 2026Wang Feng-Mingdirector, officer: CEOSell8,083$54.14
Mar 19, 2026Lee Chan Wofficer: Chief Operations OfficerGrant7,320
Mar 19, 2026Ju Chi-Hongofficer: Senior VP, Systems & GM, AsiaGrant5,930
Mar 19, 2026Ju Chi-Hongofficer: Senior VP, Systems & GM, AsiaOption9,553
Mar 19, 2026Young John Alexanderofficer: CFOOption3,556
Mar 19, 2026Lee Chan Wofficer: Chief Operations OfficerSell6,729$52.77
Mar 19, 2026Wang Feng-Mingdirector, officer: CEOOption27,598
Mar 19, 2026Young John Alexanderofficer: CFOSell3,038$54.14
Mar 19, 2026Chen Yun-Lungofficer: VP, Business Development and MGrant2,849
Mar 19, 2026Chen Yun-Lungofficer: VP, Business Development and MOption4,651
Mar 19, 2026Lee Chan Wofficer: Chief Operations OfficerOption13,678
Mar 19, 2026Wang Feng-Mingdirector, officer: CEOGrant15,686
Mar 4, 2026Wang Feng-Mingdirector, officer: CEOSell12,040$61.42
Mar 4, 2026Wang Feng-Mingdirector, officer: CEOSell32,460$60.91
Mar 4, 2026Wang Feng-Mingdirector, officer: CEOSell1,000$56.83
Mar 4, 2026Chen Yun-Lungofficer: VP, Business Development and MGrant7,220
Mar 4, 2026Wang Feng-Mingdirector, officer: CEOSell2,600$59.53
Mar 4, 2026Lee Chan Wofficer: Chief Operations OfficerGrant24,701

Source: AMBA SEC Form 4 filings, latest May 28, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their AMBA positions over the last 6 months (SEC Form 13F).

Increased
233
New positions
110
Reduced
210
Sold out
134
Largest moves
InstitutionActionSharesFiled
VANGUARD GROUP INCIncreased5.5MJan 29, 2026
BLACKROCK, INC.Reduced3.8MFeb 12, 2026
BLACKROCK, INC.Reduced3.8MMay 13, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position3.7MMay 8, 2026
STATE STREET CORPIncreased2.0MMay 15, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position1.8MMay 15, 2026
STATE STREET CORPIncreased1.7MFeb 13, 2026
JERICHO CAPITAL ASSET MANAGEMENT L.P.Increased1.6MFeb 17, 2026
MANUFACTURERS LIFE INSURANCE COMPANY, THEIncreased1.6MMay 15, 2026
MILLENNIUM MANAGEMENT LLCIncreased1.5MMay 15, 2026
MANUFACTURERS LIFE INSURANCE COMPANY, THEIncreased1.1MFeb 13, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased1.0MMay 15, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased1.0MFeb 9, 2026
PRICE T ROWE ASSOCIATES INC /MD/Increased952KMay 15, 2026
CITADEL ADVISORS LLCIncreased932KMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.