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
Thomas M. StepienCEO2026-08-248,000$10.03
$80.24kSell
Constantin Ionel StefanCTO2026-08-2129,681$10.34
$306.93kSell
Thomas M. StepienCEO2026-08-2123,529$10.34
$243.31kSell
Kang SunDirector2026-08-2162,101$10.34
$642.19kSell
Donald R. DixonDirector2026-06-1585,000$17.17
$1.46MSell
Donald R. DixonDirector2026-06-0940,000$19.13
$765.20kSell
Thomas M. StepienChief Executive Officer2026-06-042,000$20.97
$41.94kSell
Kang SunDirector2026-05-27356$17.19
$6.12kSell
Constantin Ionel StefanChief Technology Officer2026-05-273,208$17.19
$55.16kSell
Thomas M. StepienChief Executive Officer2026-05-274,375$17.19
$75.22kSell

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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
Wen Hsuan Hsieh2.80%4,093,689$37.25MInsider
Amprius Inc1.71%2,500,071$22.75MInsider
Jonathan Bornstein1.02%1,485,025$13.51MInsider
Justin E. Mirro0.92%1,337,895$12.17MInsider
Kang Sun0.91%1,331,209$12.11MInsider
Sandra Wallach0.69%1,005,275$9.15MInsider
Constantin Ionel Stefan0.53%771,629$7.02MInsider
Thomas M. Stepien0.45%652,924$5.94MInsider
Donald R. Dixon0.31%446,954$4.07MInsider
Ricardo C. Rodriguez0.24%350,000$3.19MInsider

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AMPX vs Electrical Equipment & Part Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
AMPX0.07%10.15%Net SellingNet Selling
FCEL0.05%51.63%Net BuyingNet Buying
EOSE0.06%8.79%Net SellingNet Selling
ENR0.10%14.88%Net BuyingNet Buying
TE0.07%34.78%Net SellingNet Buying

Amprius Technologies Stock Ownership FAQ

Who owns Amprius Technologies?

Amprius Technologies (NYSE: AMPX) is owned by 0.07% institutional shareholders, 10.15% Amprius Technologies insiders, and 89.79% retail investors. Wen Hsuan Hsieh is the largest individual Amprius Technologies shareholder, owning 4.09M shares representing 2.80% of the company. Wen Hsuan Hsieh's Amprius Technologies shares are currently valued at $39.05M.

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