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NASDAQ: AMPH
Amphastar Pharmaceuticals Inc Stock Ownership - Who owns Amphastar Pharmaceuticals?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Amphastar Pharmaceuticals Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Floyd F. PetersenDirector2025-04-01500$28.38
$14.19kSell
William J. PetersCFO EVP TREASURER2025-03-173,004$27.69
$83.18kSell
Jack Y. ZhangCEO CHIEF SCIENTIFIC OFFICER2025-03-177,223$27.69
$200.00kSell
Jack Y. ZhangCEO CHIEF SCIENTIFIC OFFICER2025-03-1716,150$27.69
$447.19kSell
Rong ZhouSENIOR EVP PRODUCTION CENTER2025-03-171,967$27.69
$54.47kSell
Yakob LiawatidewiEVP CORP ADMIN CENTER2025-03-171,731$27.69
$47.93kSell
Yakob LiawatidewiEVP CORP ADMIN CENTER2025-03-151,031$26.66
$27.49kSell
William J. PetersCFO EVP TREASURER2025-03-151,968$26.66
$52.47kSell
Rong ZhouSENIOR EVP PRODUCTION CENTER2025-03-151,222$26.66
$32.58kSell
Jack Y. ZhangCEO CHIEF SCIENTIFIC OFFICER2025-03-154,115$26.66
$109.71kSell

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Net Insider Buy/Sell (L12M) Ownership

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AMPH Shareholders

What type of owners hold Amphastar Pharmaceuticals Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Jack Y. Zhang36.33%17,311,932$424.14MInsider
Mary Z. Luo18.76%8,941,010$219.05MInsider
Applied Physics Chemistry Laboratories Inc15.38%7,327,679$179.53MInsider
Blackrock Inc12.84%6,117,822$149.89MInstitution
Vanguard Group Inc5.70%2,714,628$66.51MInstitution
Td Asset Management Inc3.86%1,840,286$45.09MInstitution
State Street Corp3.35%1,596,110$39.10MInstitution
Neuberger Berman Group LLC2.88%1,374,125$33.67MInstitution
Pacer Advisors Inc2.83%1,350,368$33.08MInstitution
Dimensional Fund Advisors LP2.52%1,198,590$29.37MInstitution

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AMPH vs Pharmaceutical Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
AMPH50.42%49.58%Net BuyingNet Buying
PCRX68.43%31.57%Net Selling
INDV62.35%0.00%
HROW28.51%71.49%Net SellingNet Selling
DVAX65.89%34.11%Net SellingNet Selling
View Top Pharmaceutical Stocks

Amphastar Pharmaceuticals Stock Ownership FAQ

Who owns Amphastar Pharmaceuticals?

Amphastar Pharmaceuticals (NASDAQ: AMPH) is owned by 74.36% institutional shareholders, 73.11% Amphastar Pharmaceuticals insiders, and 0.00% retail investors. Jack Y. Zhang is the largest individual Amphastar Pharmaceuticals shareholder, owning 17.31M shares representing 36.33% of the company. Jack Y. Zhang's Amphastar Pharmaceuticals shares are currently valued at $422.58M.

If you're new to stock investing, here's how to buy Amphastar Pharmaceuticals stock.
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