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Amphastar Pharmaceuticals, Inc.

AMPH
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001297184

In the last 90 days, Amphastar Pharmaceuticals, Inc. insiders filed 0 open-market purchases and 5 sales; 212 institutions reported holding it in 13F filings for Q2 2026, worth $572.1M in total; no superinvestor holds it.

Q2 2025 vs. Q1 2025

How the institutions holding Amphastar Pharmaceuticals, Inc. changed between Q1 2025 and Q2 2025.

All holders in Q2 2025All holders in Q1 2025

13F holders of AMPH: Q1 2025 compared with Q2 2025
MeasureQ1 2025Of which not filed for Q2 2025Q2 2025Change
Holders2411245+5
Shares33.2M20932.7M−518.9K (−1.6%)
Value$963.6M$6.06K$752.0M−$211.6M (−22.0%)

1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (45)

Institutions that held Amphastar Pharmaceuticals, Inc. at the end of Q2 2025 but not at the end of Q1 2025.

Institutions new to AMPH in Q2 2025
InstitutionSharesValue% of portfolio
Bridgeway Capital Management, LLC85,112$1.95M0.05%
Empowered Funds, LLC85,112$1.95M0.02%
Arrowstreet Capital, Limited Partnership81,239$1.87M0.00%
Jump Financial, LLC63,334$1.45M0.02%
Capital Fund Management S.A.40,570$931.5K0.01%
O'Shaughnessy Asset Management, LLC40,309$925.5K0.01%
Susquehanna Portfolio Strategies, LLC39,564$908.4K0.02%
Edgestream Partners, L.P.37,112$852.1K0.02%
Dynamic Technology Lab Private Ltd33,300$765.0K0.10%
Danske Bank A/S29,898$686.5K0.00%
SG Americas Securities, LLC24,448$561.0K0.00%
Centiva Capital, LP24,161$554.7K0.04%
Fox Run Management, L.L.C.21,199$486.7K0.08%
Aquatic Capital Management LLC21,195$486.6K0.01%
Y-Intercept (Hong Kong) Ltd17,727$407.0K0.01%
Vident Advisory, LLC17,279$396.7K0.00%
Occudo Quantitative Strategies LP15,774$362.2K0.04%
PDT Partners, LLC14,630$335.9K0.02%
Magnetar Financial LLC13,337$306.2K0.00%
Quantinno Capital Management LP11,269$258.7K0.00%
Schonfeld Strategic Advisors LLC10,340$237.4K0.00%
Deerfield Management Company, L.P. (Series C)9,579$219.9K0.00%
Lazard Asset Management LLC6,344$145.0K0.00%
Simplex Trading, LLC1,379$31.0K0.00%
Global Retirement Partners, LLC321$7.37K0.00%
BNP PARIBAS ASSET MANAGEMENT Holding S.A.199$5.00K0.00%
WealthCollab, LLC207$4.75K0.00%
MAI Capital Management186$4.27K0.00%
Essential Partners LLC156$3.58K0.00%
TD Waterhouse Canada Inc.100$2.33K0.00%
SRS Capital Advisors, Inc.81$1.86K0.00%
Northwestern Mutual Wealth Management Co62$1.42K0.00%
First Horizon Advisors, Inc.58$1.33K0.00%
Private Trust Co NA49$1.13K0.00%
Avion Wealth60$1.00K0.00%
UMA Financial Services, Inc.41$9420.00%
Atlantic Trust, LLC33$7580.00%
Rialto Wealth Management, LLC20$4600.00%
HighMark Wealth Management LLC20$4590.00%
Bare Financial Services, Inc19$4360.00%
Annis Gardner Whiting Capital Advisors, LLC16$3680.00%
Kilter Group LLC15$3450.00%
Elequin Capital LP14$3210.00%
Legacy Investment Solutions, LLC10$2300.00%
WealthTrak Capital Management LLC5$1150.00%

Sold out (40)

Institutions that held Amphastar Pharmaceuticals, Inc. at the end of Q1 2025 and filed for Q2 2025 without it.

Institutions that sold out of AMPH in Q2 2025
InstitutionShares, Q1 2025Value, Q1 2025
Boston Partners423,070$11.9M
Granite Investment Partners, LLC375,778$10.9M
Silvercrest Asset Management Group LLC165,856$4.81M
Frontier Capital Management Co LLC119,628$3.47M
Numerai GP LLC34,006$985.8K
Connor, Clark & Lunn Investment Management Ltd.32,241$934.7K
Hussman Strategic Advisors, Inc.31,500$913.2K
Franklin Resources Inc20,260$587.3K
Jain Global LLC20,136$583.7K
Corebridge Financial, Inc.19,756$572.7K
XTX Topco Ltd18,358$532.2K
Allspring Global Investments Holdings, LLC15,326$433.6K
LPL Financial LLC14,300$414.6K
Amundi14,925$406.6K
Cambridge Investment Research Advisors, Inc.13,790$400.0K
Pathstone Holdings, LLC10,328$299.7K
Envestnet Asset Management Inc9,938$288.1K
EntryPoint Capital, LLC8,498$246.4K
Shaker Investments LLC8,475$245.7K
CIBC World Markets Corp8,399$243.5K
Quadrant Capital Group LLC8,277$240.0K
Rafferty Asset Management, LLC8,126$235.6K
Cornerstone Investment Partners, LLC8,028$232.7K
Hennion & Walsh Asset Management, Inc.7,764$225.1K
Corient IA LLC7,500$217.4K
CI Private Wealth, LLC7,230$209.6K
Tiemann Investment Advisors, LLC6,962$201.8K
FORA Capital, LLC6,903$200.1K
EMC Capital Management3,113$90.0K
KBC Group NV2,159$63.0K
BI Asset Management Fondsmaeglerselskab A/S1,359$39.0K
Coldstream Capital Management Inc334$9.68K
Capital Advisors, Ltd. LLC75$2.00K
Cherry Tree Wealth Management, LLC58$1.68K
Boston Private Wealth LLC34$986
Barrow Hanley Mewhinney & Strauss LLC20$580
Bell Investment Advisors, Inc15$435
Stephens Consulting, LLC15$435
True Wealth Design, LLC9$261
Bruce G. Allen Investments, LLC9$261

Not filed for Q2 2025 yet (1)

Institutions that held Amphastar Pharmaceuticals, Inc. at the end of Q1 2025 and haven't filed a 13F for Q2 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding AMPH in Q1 2025 that haven't filed for Q2 2025
InstitutionShares, Q1 2025Value, Q1 2025
Lindbrook Capital, LLC209$6.06K