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Disclosery

AMPH AMPHASTAR PHARMACEUTICALS IN

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COM (common), issuer CIK 1297184

234 managers (242 13F filers) reported a position in AMPH shares at 2025-03-31, 33,236,197 shares in all. 29 filers opened a position and 49 filers sold out during the quarter.

Managers
234
13F filers
242
New
29
Added
81
Reduced
96
Sold out
49
Shares held by filers
33,236,197

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2025

Filers in the available 13F reports with a share position at 2025-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.6,147,658$178M<0.01%+29,83613F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding2,430,673$70.5M-283,955Timeline
TD Asset Management Inc2,212,142$64.1M0.06%+371,85613F-HRTimeline
Boston Trust Walden Corpgroup of 2 filers holding1,638,694$47.2M+233,138Timeline
STATE STREET CORPin group STATE STREET CORP1,604,614$46.5M<0.01%+8,50413F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,356,360$39.3M0.01%+157,77013F-HRTimelineGroup
FULLER & THALER ASSET MANAGEMENT, INC.1,263,598$36.6M0.14%+130,67213F-HRTimeline
Epoch Investment Partners, Inc.1,261,307$36.6M0.19%+160,03413F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP1,031,722$29.9M0.04%+423,01613F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC955,076$27.7M<0.01%+38,99513F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC868,551$25.2M0.02%+611,99513F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP594,437$17.2M<0.01%-18,73313F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.585,115$17M0.04%-238,37213F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/541,221$15.7M<0.01%-25,43513F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY522,112$15.1M<0.01%-109,96213F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC495,000$14.4M0.02%-30,50013F-HRTimeline
Pacer Advisors, Inc.479,390$13.9M0.03%-870,97813F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC406,712$11.8M<0.01%-21,12313F-HR/ATimelineGroup
Granite Investment Partners, LLC375,778$10.9M0.55%-20,92413F-HRTimeline
Invesco Ltd.in group Invesco Ltd.359,143$10.4M<0.01%+60,27913F-HRTimelineGroup
ExodusPoint Capital Management, LP343,292$9.95M0.13%new13F-HRTimeline
SYSTEMATIC FINANCIAL MANAGEMENT LP326,546$9.47M0.27%+80,19813F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co326,226$9.46M<0.01%-21,28613F-HR/ATimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC307,993$8.93M0.01%-164,02413F-HRTimelineGroup
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC270,150$7.83M0.03%+32,63013F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp266,075$7.71M<0.01%-19,78813F-HRTimelineGroup
Qube Research & Technologies Ltd258,981$7.51M0.01%+143,68913F-HRTimeline
ROYCE & ASSOCIATES LP247,858$7.19M0.08%+238,95613F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC216,002$6.26M0.02%+72,56613F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding213,430$6.19M+4,669Timeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding185,795$5.39M+154,529Timeline
UBS Group AGgroup of 2 filers holding168,413$4.88M-68,560Timeline
SILVERCREST ASSET MANAGEMENT GROUP LLC165,856$4.81M0.03%-95813F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management162,138$4.7M0.01%new13F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding160,028$4.64M-24,056Timeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC155,979$4.52M<0.01%+15,56613F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC155,146$4.5M<0.01%+9,13113F-HRTimelineGroup
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …150,932$4.32M<0.01%-128,78213F-HRTimelineGroup
LAM GROUP, INC.130,800$3.79M2.79%013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson124,402$3.54M<0.01%-64,94513F-HRTimelineGroup
FRONTIER CAPITAL MANAGEMENT CO LLC119,628$3.47M0.04%-3,73213F-HRTimeline
Public Sector Pension Investment Board118,885$3.45M0.01%+25,45513F-HRTimeline
Bridge City Capital, LLC115,855$3.36M1.01%+45,76013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/106,690$3.09M<0.01%-5,40413F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc101,576$2.94M<0.01%-2,16513F-HRTimelineGroup
Nuveen, LLCin group TIAA95,665$2.77M<0.01%13F-HRTimelineGroup
Trexquant Investment LP91,291$2.65M0.03%-14,23713F-HRTimeline
RHUMBLINE ADVISERS88,958$2.58M<0.01%+1,63113F-HR/ATimeline
HRT FINANCIAL LP86,364$2.5M0.02%new13F-HRTimeline
CX Institutional82,147$2.38M0.09%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND81,565$2.36M<0.01%+11,07513F-HR/ATimeline
VICTORY CAPITAL MANAGEMENT INC81,087$2.35M<0.01%+17,70013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC77,737$2.25M<0.01%+14,56613F-HRTimelineGroup
Swiss National Bank74,500$2.16M<0.01%-1,90013F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC69,770$2.02M<0.01%+52,10613F-HR/ATimelineGroup
BARCLAYS PLCin group BARCLAYS PLC66,952$1.94M<0.01%-17,83813F-HR/ATimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO66,880$1.94M<0.01%-86,69113F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC60,289$1.75M0.02%+18,13313F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC37,614$1.67M<0.01%-1,08013F-HRTimelineGroup
SteelPeak Wealth, LLC55,795$1.62M0.07%new13F-HRTimeline
Aurora Investment Counsel54,081$1.57M0.87%-62413F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC53,638$1.55M<0.01%+24,16713F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.50,630$1.47M<0.01%013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC46,665$1.35M<0.01%-52,82213F-HR/ATimelineGroup
Campbell & CO Investment Adviser LLC45,789$1.33M0.1%-1,77713F-HRTimeline
GSA CAPITAL PARTNERS LLP45,297$1.31M0.12%+27,86313F-HRTimeline
TWINBEECH CAPITAL LP43,986$1.28M0.02%-2,81113F-HRTimeline
LSV ASSET MANAGEMENT43,200$1.25M<0.01%+6,80013F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC40,537$1.18M<0.01%-1,38413F-HRTimelineGroup
Engineers Gate Manager LP38,545$1.12M0.02%+9,43713F-HRTimeline
Man Group plcin group Man Group plc38,237$1.11M<0.01%+16,41213F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…36,369$1.05M<0.01%013F-HRTimeline
Numerai GP LLC34,006$986K0.19%new13F-HRTimeline
Arkadios Wealth Advisors33,966$985K0.04%+6,00213F-HRTimeline
ARISTEIA CAPITAL, L.L.C.33,835$981K0.03%-9,40013F-HRTimeline
Connor, Clark & Lunn Investment Managem…32,241$935K<0.01%-35,12613F-HRTimeline
HUSSMAN STRATEGIC ADVISORS, INC.31,500$913K0.22%new13F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co31,262$907K<0.01%-3,78313F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\30,910$896K<0.01%-3,17213F-HRTimelineGroup
Polaris Capital Management, LLC30,800$893K0.05%+6,30013F-HRTimeline
Legato Capital Management LLC29,699$861K0.12%+11,23813F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC29,672$860K<0.01%-63,23213F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN29,361$851K<0.01%+5,80913F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.29,188$846K<0.01%-89,66313F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…27,547$799K<0.01%-1,44113F-HR/ATimelineGroup
Illumine Investment Management, LLC26,530$769K0.63%+9,48113F-HRTimeline
Graham Capital Management, L.P.26,424$766K0.02%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA26,079$756K<0.01%-2,55313F-HR/ATimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD25,592$742K<0.01%-5713F-HRTimeline
Advisor OS, LLCin group Advisor OS, LLC25,405$736K0.08%013F-HRTimelineGroup
MARTINGALE ASSET MANAGEMENT L P24,542$711K0.02%-15,66313F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding24,098$698K+620Timeline
NEW YORK STATE TEACHERS RETIREMENT SYST…23,866$692K<0.01%013F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…23,093$669K<0.01%-35913F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL21,793$632K0.01%new13F-HRTimeline
Quantbot Technologies LP21,109$612K0.02%-4,34513F-HRTimeline
State of Alaska, Department of Revenue20,781$602K0.01%-54413F-HRTimeline
Illinois Municipal Retirement Fund20,355$590K0.01%-60413F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources20,260$587K<0.01%-7,14513F-HRTimelineGroup
Jain Global LLC20,136$584K0.01%+2,16213F-HRTimeline
Creative Planningin group Creative Planning20,127$583K<0.01%+20,11413F-HRTimelineGroup
DekaBank Deutsche Girozentrale20,848$580K<0.01%013F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …19,826$575K<0.01%-1,43113F-HRTimelineGroup
Corebridge Financial, Inc.in group Corebridge Financial, Inc.19,756$573K<0.01%-69313F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd18,358$532K0.03%new13F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC18,142$526K<0.01%+1,35713F-HR/ATimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP17,852$518K<0.01%-63,27713F-HRTimelineGroup
Louisiana State Employees Retirement Sy…17,700$513K0.01%-40013F-HRTimeline
ALGERT GLOBAL LLC17,300$502K0.01%new13F-HR/ATimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…16,913$490K<0.01%-87113F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.16,142$468K<0.01%-5813F-HRTimelineGroup
Assenagon Asset Management S.A.15,216$441K<0.01%-146,18313F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …15,326$434K<0.01%+1,26213F-HRTimelineGroup
Corient Private Wealth LPgroup of 2 filers holding14,730$427K-651Timeline
Handelsbanken Fonder AB14,400$417K<0.01%013F-HRTimeline
LPL Financial LLC14,300$415K<0.01%-6,06613F-HRTimeline
Amundiin group Amundi14,925$407K<0.01%-4,65813F-HRTimelineGroup
ADVISORY RESEARCH INC13,889$403K0.07%+3613F-HRTimeline
Cambridge Investment Research Advisors,…13,790$400K<0.01%+1,69413F-HRTimeline
Cynosure Group, LLC12,401$360K0.05%+4,78313F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…11,691$338K<0.01%013F-HRTimeline
AlphaQuest LLC11,593$336K0.04%+6,73113F-HRTimeline
COMERICA BANK11,563$335K<0.01%-24213F-HRTimeline
PROFUND ADVISORS LLC11,256$326K0.01%+3,33613F-HRTimeline
SEGALL BRYANT & HAMILL, LLC11,185$324K<0.01%-7,69613F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC11,115$322K<0.01%-23113F-HRTimeline
ProShare Advisors LLC11,077$321K<0.01%-2,77513F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM11,012$319K<0.01%-29213F-HRTimeline
Maryland State Retirement & Pension Sys…10,936$317K0.01%-1,69413F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…10,913$316K<0.01%013F-HRTimeline
Gotham Asset Management, LLC10,870$315K<0.01%-17,57813F-HRTimeline
AMALGAMATED BANK10,761$312K<0.01%-23713F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS10,358$300K<0.01%-1,19013F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC10,328$300K<0.01%+63413F-HRTimelineGroup
Significant Wealth Partners LLC10,215$296K0.15%+3,08013F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC9,938$288K<0.01%-22,26513F-HRTimelineGroup
CIM, LLC9,888$287K0.04%-19013F-HRTimeline
China Universal Asset Management Co., L…9,644$280K0.03%-55113F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO9,591$278K<0.01%-18,53413F-HR/ATimelineGroup
VIRGINIA RETIREMENT SYSTEMS ET Al9,562$277K<0.01%13F-HRTimeline
Vestcor Inc9,383$272K0.01%013F-HRTimeline
Sterling Capital Management LLC9,319$270K<0.01%013F-HRTimeline
State of Tennessee, Department of Treas…9,300$270K<0.01%-7,49213F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…8,975$260K<0.01%+96913F-HRTimeline
EXCHANGE TRADED CONCEPTS, LLC8,866$257K<0.01%new13F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…8,585$249K0.01%+1,68013F-HRTimelineGroup
OREGON PUBLIC EMPLOYEES RETIREMENT FUND8,542$248K<0.01%-30013F-HRTimeline
EntryPoint Capital, LLC8,498$246K0.11%-5,16013F-HRTimeline
SHAKER INVESTMENTS LLC/OH8,475$246K0.12%-10,04513F-HRTimeline
CIBC WORLD MARKETS CORP8,399$243K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…8,288$240K<0.01%013F-HRTimeline
QUADRANT CAPITAL GROUP LLC8,277$240K0.01%+7,53713F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/8,206$238K<0.01%-913F-HRTimelineGroup
Rafferty Asset Management, LLC8,126$236K<0.01%new13F-HRTimeline
Cornerstone Investment Partners, LLC8,028$233K0.01%-70213F-HRTimeline
HOHIMER WEALTH MANAGEMENT, LLC8,005$232K0.05%+52013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS7,945$230K<0.01%-29,01913F-HRTimelineGroup
Hennion & Walsh Asset Management, Inc.7,764$225K0.01%-17513F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…7,504$218K<0.01%013F-HRTimeline
KLP KAPITALFORVALTNING AS7,400$215K<0.01%013F-HRTimeline
TIEMANN INVESTMENT ADVISORS, LLC6,962$202K0.09%013F-HRTimeline
FORA Capital, LLC6,903$200K0.02%new13F-HRTimeline
OAKWORTH CAPITAL, INC.6,000$174K0.01%+97713F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…5,265$153K<0.01%013F-HRTimeline
State of Wyoming4,860$141K0.02%new13F-HRTimeline
FMR LLCin group FMR LLC4,806$139K<0.01%-16,53913F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…4,783$139K<0.01%+58013F-HRTimelineGroup
SHELL ASSET MANAGEMENT CO4,633$134K0.01%-20113F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,762$109K<0.01%013F-HRTimelineGroup
EMC Capital Management3,113$90K0.05%013F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD2,700$78.3K<0.01%+2,60013F-HRTimeline
1620 INVESTMENT ADVISORS, INC.2,277$66K0.05%-1113F-HRTimeline
KBC Group NVin group KBC Group NV2,159$63K<0.01%013F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…2,058$59.7K<0.01%+1,86213F-HRTimelineGroup
TD PRIVATE CLIENT WEALTH LLC1,727$50.1K<0.01%-37213F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT1,608$46K<0.01%+1,58413F-HRTimeline
Blue Trust, Inc.1,459$42.3K<0.01%+24313F-HRTimeline
BI Asset Management Fondsmaeglerselskab…in group BI Asset Management Fondsmaeg…1,359$39K<0.01%new13F-HRTimelineGroup
GAMMA Investing LLC1,333$38.6K<0.01%+42413F-HR/ATimeline
Allworth Financial LP1,566$37.7K<0.01%+14013F-HRTimeline
Pinnacle Financial Partners Inc1,000$37.1K<0.01%013F-HRTimeline
GF FUND MANAGEMENT CO. LTD.1,230$35.7K<0.01%+22013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC1,224$35.5K<0.01%+45113F-HRTimeline
IFP Advisors, Inc1,158$33.7K<0.01%+1,15813F-HRTimeline
Parkside Financial Bank & Trust1,006$29.2K<0.01%+2713F-HRTimeline
Leonteq Securities AG1,000$29K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…987$28.6K<0.01%-15813F-HRTimelineGroup
SIGNATUREFD, LLC872$25.3K<0.01%+52013F-HRTimeline
CWM, LLCin group CWM, LLC668$19K<0.01%-48613F-HRTimelineGroup
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.797$18.9K<0.01%+23613F-HRTimelineGroup
Larson Financial Group LLC625$18.1K<0.01%new13F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK624$18.1K<0.01%-71613F-HRTimelineGroup
BESSEMER GROUP INCin group BESSEMER GROUP INC561$17K<0.01%-488,06913F-HRTimelineGroup
Smartleaf Asset Management LLC567$16.1K<0.01%-14813F-HRTimeline
MassMutual Private Wealth & Trust, FSB431$12.5K<0.01%+33413F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\402$11.7K<0.01%-44613F-HRTimelineGroup
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…372$10.8K<0.01%-5113F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…357$10.3K<0.01%+6813F-HRTimeline
Versant Capital Management, Inc356$10.3K<0.01%+13513F-HRTimeline
COLDSTREAM CAPITAL MANAGEMENT INC334$9.68K<0.01%new13F-HRTimeline