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Amphastar Pharmaceuticals (AMPH) Institutional Ownership

Amphastar Pharmaceuticals logo
$23.88 -0.53 (-2.17%)
Closing price 05/1/2025 04:00 PM Eastern
Extended Trading
$23.87 -0.01 (-0.04%)
As of 05/1/2025 07:04 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.
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Institutional Ownership Changes (13F Filings) for Amphastar Pharmaceuticals (NASDAQ:AMPH)

Current
Institutional Ownership
Percentage
65.09%
Number of
Institutional Buyers
(last 12 months)
153
Total
Institutional Inflows
(last 12 months)
$343.55M
Number of
Institutional Sellers
(last 12 months)
93
Total
Institutional Outflows
(last 12 months)
$176.07M
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AMPH Institutional Buying and Selling by Quarter

Amphastar Pharmaceuticals Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/1/2025Aurora Investment Counsel54,081$1.57M0.9%-1.1%0.114%
5/1/2025New York State Common Retirement Fund81,565$2.37M0.0%+15.7%0.172%
5/1/2025SteelPeak Wealth LLC55,795$1.62M0.1%N/A0.117%
4/30/2025 Cornerstone Investment Partners LLC8,028$233K0.0%-8.0%0.017%
4/30/2025 Significant Wealth Partners LLC10,215$296K0.2%+43.2%0.022%
4/30/2025 China Universal Asset Management Co. Ltd.9,644$280K0.0%-5.4%0.020%
4/28/2025 Principal Financial Group Inc.212,647$6.17M0.0%+2.2%0.448%
4/28/2025 Teacher Retirement System of Texas10,358$300K0.0%-10.3%0.022%
4/24/2025 Allspring Global Investments Holdings LLC15,326$434K0.0%+9.0%0.032%
4/24/2025 Oakworth Capital Inc.6,000$174K0.0%+19.5%0.013%
4/24/2025 Illinois Municipal Retirement Fund20,355$590K0.0%-2.9%0.043%
4/22/2025 Illumine Investment Management LLC26,530$769K0.6%+55.6%0.056%
4/22/2025 Cambridge Investment Research Advisors Inc.13,790$400K0.0%+14.0%0.029%
4/21/2025 Boston Trust Walden Corp1,215,624$35.24M0.3%+24.2%2.559%
4/21/2025 State of Alaska Department of Revenue20,781$602K0.0%-2.6%0.044%
4/17/2025 Exchange Traded Concepts LLC8,866$257K0.0%N/A0.019%
4/15/2025 CX Institutional82,147$2.38M0.1%N/A0.172%
4/15/2025 Assenagon Asset Management S.A.15,216$441K0.0%-90.6%0.032%
4/15/2025 GAMMA Investing LLC1,333$39K0.0%+46.6%0.003%
4/14/2025 Bridge City Capital LLC115,855$3.36M1.0%+65.3%0.243%
4/8/2025 Rhumbline Advisers88,958$2.58M0.0%+1.9%0.187%
4/7/2025 GAMMA Investing LLC38,644$1.12M0.0%+4,151.3%0.081%
3/24/2025Wellington Management Group LLP17,784$660K0.0%-9.8%0.037%
3/18/2025California State Teachers Retirement System36,369$1.35M0.0%-1.6%0.076%
2/19/2025Invst LLC11,346$421K0.1%-21.2%0.024%
2/19/2025 GF Fund Management CO. LTD.1,010$38K0.0%N/A0.002%
2/17/2025UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC83,231$3.09M0.0%-85.6%0.173%
2/17/2025Voloridge Investment Management LLC143,436$5.33M0.0%+16.2%0.298%
2/17/2025Squarepoint Ops LLC17,664$656K0.0%+208.0%0.037%
2/17/2025Twinbeech Capital LP46,797$1.74M0.0%N/A0.097%
2/17/2025Two Sigma Advisers LP85,900$3.19M0.0%-12.6%0.179%
2/17/2025Two Sigma Investments LP98,184$3.65M0.0%-0.6%0.204%
2/17/2025Systematic Financial Management LP246,348$9.15M0.2%N/A0.512%
2/17/2025Silvercrest Asset Management Group LLC166,814$6.19M0.0%-1.0%0.347%
2/17/2025Point72 Asset Management L.P.9,200$342K0.0%-76.3%0.019%
2/17/2025ProShare Advisors LLC13,852$514K0.0%+27.2%0.029%
2/17/2025Man Group plc21,825$810K0.0%N/A0.045%
2/17/2025Nuveen Asset Management LLC95,665$3.55M0.0%-54.0%0.199%
2/17/2025Millennium Management LLC256,556$9.53M0.0%-1.2%0.534%
2/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.21,876$812K0.0%+3.8%0.045%
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2/17/2025Janus Henderson Group PLC189,347$7.03M0.0%+28.8%0.394%
2/17/2025Gotham Asset Management LLC28,448$1.06M0.0%-20.4%0.059%
2/17/2025Clark Capital Management Group Inc.148,075$5.50M0.0%-3.7%0.308%
2/17/2025Deutsche Bank AG34,082$1.27M0.0%+46.6%0.071%
2/17/2025D. E. Shaw & Co. Inc.118,851$4.41M0.0%+402.4%0.247%
2/17/2025Centiva Capital LP9,803$364K0.0%+51.6%0.020%
2/17/2025Brevan Howard Capital Management LP6,905$256K0.0%N/A0.014%
2/17/2025BNP Paribas Financial Markets36,964$1.37M0.0%-60.9%0.077%
2/17/2025Ameriprise Financial Inc.146,015$5.42M0.0%+1.0%0.304%
2/17/2025Aristeia Capital L.L.C.43,235$1.61M0.1%N/A0.090%
2/14/2025Jane Street Group LLC99,487$3.69M0.0%+23.0%0.207%
2/14/2025Comerica Bank11,805$438K0.0%-25.8%0.025%
2/14/2025PDT Partners LLC90,484$3.36M0.3%+11.5%0.188%
2/14/2025Schonfeld Strategic Advisors LLC42,614$1.58M0.0%+343.6%0.089%
2/14/2025Northern Trust Corp613,170$22.77M0.0%+5.1%1.275%
2/14/2025The Manufacturers Life Insurance Company 21,257$789K0.0%-2.8%0.044%
2/14/2025Aquatic Capital Management LLC7,036$261K0.0%N/A0.015%
2/14/2025Oberweis Asset Management Inc.184,595$6.85M0.3%+14.5%0.384%
2/14/2025Voya Investment Management LLC16,785$623K0.0%-2.5%0.035%
2/14/2025Fuller & Thaler Asset Management Inc.1,132,926$42.07M0.2%-10.1%2.356%
2/14/2025Price T Rowe Associates Inc. MD566,656$21.04M0.0%-0.4%1.179%
2/14/2025Hsbc Holdings PLC8,991$330K0.0%+23.4%0.019%
2/14/2025State of Tennessee Department of Treasury16,792$623K0.0%-15.4%0.035%
2/14/2025Tower Research Capital LLC TRC 1,145$43K0.0%+43.7%0.002%
2/14/2025MetLife Investment Management LLC23,452$871K0.0%+3.7%0.049%
2/14/2025Mesirow Institutional Investment Management Inc.380,389$14.12M1.1%-8.1%0.791%
2/14/2025Dimensional Fund Advisors LP1,198,590$44.50M0.0%+9.6%2.493%
2/14/2025First Trust Advisors LP81,129$3.01M0.0%+350.0%0.169%
2/14/2025Epoch Investment Partners Inc.1,101,273$40.89M0.2%-7.5%2.291%
2/13/2025CANADA LIFE ASSURANCE Co35,045$1.30M0.0%-5.1%0.073%
2/13/2025Marshall Wace LLP608,706$22.60M0.0%+7.1%1.266%
2/13/2025Portolan Capital Management LLC131,123$4.87M0.3%-60.0%0.273%
2/13/2025Walleye Capital LLC8,666$322K0.0%N/A0.018%
2/13/2025Barclays PLC84,790$3.15M0.0%+13.9%0.176%
2/13/2025Granite Investment Partners LLC396,702$14.73M0.6%-2.2%0.825%
2/13/2025LSV Asset Management36,400$1.35M0.0%-54.7%0.076%
2/13/2025 Bessemer Group Inc.488,630$18.14M0.0%+2.4%1.016%
2/13/2025Raymond James Financial Inc.92,904$3.45M0.0%N/A0.193%
2/13/2025Renaissance Group LLC99,572$3.70M0.2%+42.5%0.207%
2/13/2025Renaissance Technologies LLC525,500$19.51M0.0%+7.4%1.093%
2/13/2025Legal & General Group Plc103,741$3.85M0.0%-3.6%0.216%
2/13/2025Bank of Montreal Can8,215$305K0.0%+4.6%0.017%
2/13/2025 Trek Financial LLC7,638$284K0.0%+15.4%0.016%
2/13/2025Aster Capital Management DIFC Ltd2,869$107K0.0%N/A0.006%
2/13/2025Federated Hermes Inc.823,487$30.58M0.1%-57.7%1.713%
2/13/2025 Envestnet Asset Management Inc.32,203$1.20M0.0%-7.1%0.067%
2/13/2025Dynamic Technology Lab Private Ltd19,150$711K0.1%+309.0%0.040%
2/12/2025Huntington National Bank1,340$50K0.0%+36.9%0.003%
2/12/2025Trexquant Investment LP105,528$3.92M0.0%+18.2%0.219%
2/12/2025Geode Capital Management LLC916,081$34.02M0.0%-0.5%1.905%
Here’s How to Claim Your Stake in Elon’s Private Company, xAI (Ad)

I predict this single breakthrough could make Elon the world’s first trillionaire — and mint more new millionaires than any tech advance in history. And for a limited time, you have the chance to claim a stake in this project, even though it’s housed inside Elon’s private company, xAI.

All the details are waiting for you now — but you need to act before the May 1st funding window clos
2/12/2025Franklin Resources Inc.27,405$1.02M0.0%-3.7%0.057%
2/12/2025Alliancebernstein L.P.50,630$1.88M0.0%+1.8%0.105%
2/12/2025Wellington Management Group LLP17,784$660K0.0%-9.8%0.037%
2/12/2025JPMorgan Chase & Co.153,571$5.70M0.0%-71.5%0.319%
2/11/2025EntryPoint Capital LLC13,658$507K0.2%+46.7%0.028%
2/11/2025Prudential Financial Inc.38,694$1.44M0.0%-1.6%0.080%
2/11/2025Corebridge Financial Inc.20,449$759K0.0%-7.3%0.043%
2/11/2025Vanguard Group Inc.2,714,628$100.79M0.0%+0.1%5.646%
2/11/2025 Bridge City Capital LLC70,095$2.60M0.7%-1.4%0.146%
2/11/2025LPL Financial LLC20,366$756K0.0%+8.0%0.042%
(Data available from 1/1/2016 forward)

AMPH Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of AMPH shares?

During the previous two years, 285 institutional investors and hedge funds held shares of Amphastar Pharmaceuticals. The most heavily invested institutionals were Vanguard Group Inc. ($100.79M), State Street Corp ($74.27M), TD Asset Management Inc ($67.66M), Pacer Advisors Inc. ($50.14M), Dimensional Fund Advisors LP ($44.50M), Fuller & Thaler Asset Management Inc. ($42.07M), and Epoch Investment Partners Inc. ($40.89M).Learn more on AMPH's institutional investors.

What percentage of Amphastar Pharmaceuticals stock is owned by institutional investors?

65.09% of Amphastar Pharmaceuticals stock is owned by institutional investors. Learn more on AMPH's institutional investor holdings.

Which institutional investors have been buying Amphastar Pharmaceuticals stock?

Of the 241 institutional investors that purchased Amphastar Pharmaceuticals stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: TD Asset Management Inc ($1.48M), Pacer Advisors Inc. ($1.35M), Boston Trust Walden Corp ($1.22M), Epoch Investment Partners Inc. ($1.08M), Granite Investment Partners LLC ($581.57K), Boston Partners ($426.64K), and Boone Capital Management LLC ($400K).

How much institutional buying is happening at Amphastar Pharmaceuticals?

Institutional investors have bought a total of 14,256,824 shares in the last 24 months. This purchase volume represents approximately $646.63M in transactions.

Which Amphastar Pharmaceuticals major shareholders have been selling company stock?

Of the 139 institutional investors that sold Amphastar Pharmaceuticals stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Federated Hermes Inc. ($1.43M), Dimensional Fund Advisors LP ($662.15K), UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($493.21K), JPMorgan Chase & Co. ($385.35K), Portolan Capital Management LLC ($354.99K), Assenagon Asset Management S.A. ($331.32K), and LSV Asset Management ($281.20K).

How much institutional selling is happening at Amphastar Pharmaceuticals?

Institutional investors have sold a total of 7,173,213 shares in the last 24 months. This volume of shares sold represents approximately $321.41M in transactions.


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This page (NASDAQ:AMPH) was last updated on 5/2/2025 by MarketBeat.com Staff
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