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

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Amprius Technologies Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Constantin Ionel StefanChief Technology Officer2026-01-2839,690$12.00
$476.36kSell
Constantin Ionel StefanChief Technology Officer2026-01-2890$0.62
$55.80Buy
Constantin Ionel StefanChief Technology Officer2026-01-2839,600$0.05
$1.98kBuy
Constantin Ionel StefanChief Technology Officer2026-01-231,600$12.00
$19.20kSell
Constantin Ionel StefanChief Technology Officer2026-01-231,600$0.05
$80.00Buy
Constantin Ionel StefanChief Technology Officer2026-01-22166,104$0.05
$8.31kBuy
Constantin Ionel StefanChief Technology Officer2026-01-22492,827$12.04
$5.93MSell
Constantin Ionel StefanChief Technology Officer2026-01-22253,928$0.05
$12.70kBuy
Constantin Ionel StefanChief Technology Officer2026-01-2272,795$0.45
$32.76kBuy
Constantin Ionel StefanChief Technology Officer2026-01-2141,563$0.62
$25.77kBuy

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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$109.45MInstitution
Vanguard Group Inc4.99%6,512,620$95.61MInstitution
Wen Hsuan Hsieh3.25%4,236,584$62.19MInsider
Driehaus Capital Management LLC2.37%3,090,669$45.37MInstitution
Morgan Stanley2.10%2,743,705$40.28MInstitution
Citadel Advisors LLC1.92%2,506,799$36.80MInstitution
Amprius Inc1.92%2,500,071$36.70MInsider
Geode Capital Management LLC1.86%2,424,888$35.60MInstitution
Invesco Ltd1.82%2,379,384$34.93MInstitution
State Street Corp1.68%2,189,782$32.15MInstitution

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AMPX vs Electrical Equipment & Part Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
AMPX48.76%11.84%Net SellingNet Selling
ENR87.32%12.68%Net SellingNet Selling
TE33.67%58.37%Net BuyingNet Buying
ENVX50.21%18.80%Net SellingNet Selling
PLPC37.39%62.61%Net SellingNet Selling
View Top Electrical Equipment & Part Stocks

Amprius Technologies Stock Ownership FAQ

Who owns Amprius Technologies?

Amprius Technologies (NYSE: AMPX) is owned by 48.76% institutional shareholders, 11.84% Amprius Technologies insiders, and 39.40% 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 $52.53M.

If you're new to stock investing, here's how to buy Amprius Technologies stock.
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