NYSE: AMPX
Amprius Technologies Inc Stock Ownership - Who owns Amprius Technologies?

Insider buying vs selling

Have Amprius Technologies Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Kang SunChief Executive Officer2025-11-2168,655$10.08
$692.11kSell
Constantin Ionel StefanChief Technology Officer2025-11-2125,024$10.08
$252.27kSell
Kang SunChief Executive Officer2025-11-171,000,000$10.60
$10.60MSell
Kang SunChief Executive Officer2025-11-17727,950$0.05
$36.40kBuy
Kang SunChief Executive Officer2025-11-1727,463$0.62
$17.03kBuy
Kang SunChief Executive Officer2025-11-1741,653$0.62
$25.82kBuy
Kang SunChief Executive Officer2025-11-17202,934$0.98
$198.88kBuy
Sandra WallachChief Financial Officer2025-08-2128,390$6.82
$193.51kSell
Constantin Ionel StefanChief Technology Officer2025-08-2119,159$6.82
$130.59kSell
Kang SunChief Executive Officer2025-08-2165,654$6.82
$447.50kSell

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Net Insider Buy/Sell (L12M) Ownership

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AMPX Shareholders

What type of owners hold Amprius Technologies Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Blackrock Inc5.71%7,455,703$90.81MInstitution
Vanguard Group Inc4.99%6,512,620$79.32MInstitution
Wen Hsuan Hsieh3.25%4,236,584$51.60MInsider
Driehaus Capital Management LLC2.37%3,090,669$37.64MInstitution
Morgan Stanley2.10%2,743,705$33.42MInstitution
Citadel Advisors LLC1.92%2,506,799$30.53MInstitution
Amprius Inc1.92%2,500,071$30.45MInsider
Geode Capital Management LLC1.86%2,424,888$29.54MInstitution
Invesco Ltd1.82%2,379,384$28.98MInstitution
State Street Corp1.68%2,189,782$26.67MInstitution

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AMPX vs Electrical Equipment & Part Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
AMPX48.76%11.44%Net SellingNet Selling
ENR87.33%12.67%Net SellingNet Selling
ENVX50.14%18.87%Net SellingNet Selling
TE33.66%33.23%Net SellingNet Selling
MVST24.05%31.02%

Amprius Technologies Stock Ownership FAQ

Who owns Amprius Technologies?

Amprius Technologies (NYSE: AMPX) is owned by 48.76% institutional shareholders, 11.44% Amprius Technologies insiders, and 39.80% retail investors. Wen Hsuan Hsieh is the largest individual Amprius Technologies shareholder, owning 4.24M shares representing 3.25% of the company. Wen Hsuan Hsieh's Amprius Technologies shares are currently valued at $51.60M.

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