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Disclosery

AMPH AMPHASTAR PHARMACEUTICALS IN

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COM (common), issuer CIK 1297184

239 managers (246 13F filers) reported a position in AMPH shares at 2025-06-30, 32,717,079 shares in all. 42 filers opened a position and 40 filers sold out during the quarter.

Managers
239
13F filers
246
New
42
Added
91
Reduced
73
Sold out
40
Shares held by filers
32,717,079

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, Q2 2025

Filers in the available 13F reports with a share position at 2025-06-30, 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.5,668,793$130M<0.01%-478,86513F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding2,699,574$62M+268,901Timeline
TD Asset Management Inc2,034,930$46.7M0.04%-177,21213F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,626,884$37.4M0.01%+270,52413F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP1,576,233$36.2M<0.01%-28,38113F-HRTimelineGroup
FULLER & THALER ASSET MANAGEMENT, INC.1,263,772$29M0.11%+17413F-HRTimeline
Epoch Investment Partners, Inc.1,241,369$28.5M0.15%-19,93813F-HRTimeline
Boston Trust Walden Corpgroup of 2 filers holding1,176,453$27M-462,241Timeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC973,237$22.3M<0.01%+18,16113F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP848,685$19.5M0.02%-183,03713F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY681,222$15.6M<0.01%+159,11013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC618,984$14.2M0.01%-249,56713F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC576,500$13.2M0.02%+81,50013F-HRTimeline
Qube Research & Technologies Ltd469,492$10.8M0.01%+210,51113F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP421,136$9.67M<0.01%-173,30113F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.386,971$8.88M<0.01%+27,82813F-HRTimelineGroup
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC365,920$8.4M0.03%+95,77013F-HRTimeline
SYSTEMATIC FINANCIAL MANAGEMENT LP359,307$8.25M0.22%+32,76113F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC356,250$8.18M<0.01%-50,46213F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co346,784$7.96M<0.01%+20,55813F-HRTimelineGroup
Pacer Advisors, Inc.326,098$7.49M0.02%-153,29213F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC325,512$7.47M0.03%+109,51013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA318,717$7.32M<0.01%+292,63813F-HR/ATimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp314,803$7.23M<0.01%+48,72813F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.293,928$6.75M0.01%+264,74013F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC292,345$6.71M0.01%+136,36613F-HRTimelineGroup
ROYCE & ASSOCIATES LP283,187$6.5M0.07%+35,32913F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/273,288$6.28M<0.01%-267,93313F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management266,306$6.11M0.01%+104,16813F-HRTimelineGroup
CX Institutional263,283$6.04M0.21%+181,13613F-HR/ATimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC233,161$5.35M<0.01%-74,83213F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding219,060$5.03M+5,630Timeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 3 filers holding195,715$4.49M+9,920Timeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding175,330$4.03M+15,302Timeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC169,849$3.9M<0.01%+14,70313F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding160,486$3.68M-7,927Timeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC160,082$3.68M0.01%+113,41713F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO158,114$3.63M<0.01%+91,23413F-HRTimelineGroup
Trexquant Investment LP155,229$3.56M0.04%+63,93813F-HRTimeline
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …152,015$3.49M<0.01%+1,08313F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/145,125$3.33M<0.01%+38,43513F-HRTimelineGroup
Bridge City Capital, LLC138,644$3.18M0.89%+22,78913F-HRTimeline
LAM GROUP, INC.130,800$3M2.01%013F-HRTimeline
Public Sector Pension Investment Board125,363$2.88M0.01%+6,47813F-HRTimeline
ALGERT GLOBAL LLC124,290$2.85M0.06%+106,99013F-HR/ATimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC117,119$2.69M<0.01%+87,44713F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc101,154$2.32M<0.01%-42213F-HRTimelineGroup
RHUMBLINE ADVISERS95,287$2.19M<0.01%+6,32913F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP94,305$2.17M<0.01%+76,45313F-HRTimelineGroup
TWINBEECH CAPITAL LP88,530$2.03M0.05%+44,54413F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC85,112$1.95M0.05%new13F-HRTimeline
Empowered Funds, LLC85,112$1.95M0.02%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC82,087$1.88M<0.01%+15,13513F-HR/ATimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …81,239$1.87M<0.01%new13F-HRTimelineGroup
Nuveen, LLCin group TIAA81,142$1.86M<0.01%-14,52313F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC76,862$1.76M<0.01%-4,22513F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC41,951$1.75M<0.01%+4,33713F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC75,845$1.74M<0.01%+22,20713F-HRTimelineGroup
Swiss National Bank72,600$1.67M<0.01%-1,90013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS71,689$1.65M<0.01%+63,74413F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC63,334$1.45M0.02%new13F-HR/ATimelineGroup
Quantbot Technologies LP60,955$1.4M0.04%+39,84613F-HRTimeline
GSA CAPITAL PARTNERS LLP57,057$1.31M0.09%+11,76013F-HRTimeline
SteelPeak Wealth, LLC55,795$1.28M0.05%013F-HRTimeline
Engineers Gate Manager LP53,348$1.22M0.02%+14,80313F-HRTimeline
Aurora Investment Counsel53,253$1.22M0.64%-82813F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC51,071$1.17M0.01%-9,21813F-HRTimeline
ALLIANCEBERNSTEIN L.P.50,630$1.16M<0.01%013F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…48,920$1.12M0.01%+40,33513F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND48,369$1.11M<0.01%-33,19613F-HR/ATimeline
ASSETMARK, INCin group ASSETMARK, INC43,766$1M<0.01%+3,22913F-HRTimelineGroup
LSV ASSET MANAGEMENT43,200$992K<0.01%013F-HRTimeline
Creative Planningin group Creative Planning42,620$979K<0.01%+22,49313F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC42,220$969K<0.01%-35,51713F-HRTimelineGroup
HRT FINANCIAL LP42,080$966K<0.01%-44,28413F-HRTimeline
CAPITAL FUND MANAGEMENT S.A.40,570$931K0.01%new13F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC40,309$925K0.01%new13F-HRTimeline
Edgestream Partners, L.P.37,112$852K0.02%new13F-HRTimeline
Legato Capital Management LLC36,060$828K0.1%+6,36113F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…35,877$824K<0.01%-49213F-HRTimeline
Arkadios Wealth Advisors35,163$807K0.02%+1,19713F-HRTimeline
Polaris Capital Management, LLC35,100$806K0.05%+4,30013F-HRTimeline
ARISTEIA CAPITAL, L.L.C.33,835$777K0.02%013F-HRTimeline
Dynamic Technology Lab Private Ltd33,300$765K0.1%new13F-HRTimeline
ExodusPoint Capital Management, LP32,444$745K0.01%-310,84813F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co30,216$694K<0.01%-1,04613F-HRTimelineGroup
DANSKE BANK A/S29,898$686K<0.01%new13F-HRTimeline
AlphaQuest LLC28,882$663K0.07%+17,28913F-HRTimeline
Illumine Investment Management, LLC27,126$623K0.5%+59613F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…27,036$621K<0.01%-51113F-HR/ATimelineGroup
Advisor OS, LLCin group Advisor OS, LLC25,405$583K0.06%013F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD25,332$582K<0.01%-26013F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\25,178$578K<0.01%-5,73213F-HRTimelineGroup
MARTINGALE ASSET MANAGEMENT L P24,542$563K0.01%013F-HRTimeline
SG Americas Securities, LLC24,448$561K<0.01%new13F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN24,396$560K<0.01%-4,96513F-HRTimelineGroup
Centiva Capital, LP24,161$555K0.04%new13F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…23,732$545K<0.01%-13413F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…23,093$530K<0.01%013F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC23,026$529K<0.01%-46,74413F-HR/ATimelineGroup
Campbell & CO Investment Adviser LLC22,433$515K0.03%-23,35613F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding22,159$509K-1,939Timeline
State of Alaska, Department of Revenue21,892$502K0.01%+1,11113F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.21,199$487K0.08%new13F-HRTimeline
Aquatic Capital Management LLC21,195$487K0.01%new13F-HRTimeline
DekaBank Deutsche Girozentrale20,848$475K<0.01%013F-HRTimeline
Man Group plcin group Man Group plc20,300$466K<0.01%-17,93713F-HRTimelineGroup
Graham Capital Management, L.P.20,288$466K0.01%-6,13613F-HRTimeline
Illinois Municipal Retirement Fund19,937$458K0.01%-41813F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …18,688$429K<0.01%-1,13813F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC18,099$416K<0.01%-4313F-HRTimelineGroup
Cynosure Group, LLC17,820$409K0.05%+5,41913F-HRTimeline
Y-Intercept (Hong Kong) Ltd17,727$407K0.01%new13F-HRTimeline
Vident Advisory, LLCin group Vident Advisory, LLC17,279$397K<0.01%new13F-HRTimelineGroup
Louisiana State Employees Retirement Sy…17,200$395K0.01%-50013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson16,868$387K<0.01%-107,53413F-HRTimelineGroup
Assenagon Asset Management S.A.16,610$381K<0.01%+1,39413F-HRTimeline
Significant Wealth Partners LLC16,178$371K0.18%+5,96313F-HRTimeline
OCCUDO QUANTITATIVE STRATEGIES LP15,774$362K0.04%new13F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…15,618$359K<0.01%-1,29513F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.15,236$357K<0.01%-90613F-HR/ATimelineGroup
ADVISORY RESEARCH INC14,898$342K0.05%+1,00913F-HRTimeline
PDT Partners, LLC14,630$336K0.02%new13F-HRTimeline
Handelsbanken Fonder AB14,400$331K<0.01%013F-HRTimeline
Gotham Asset Management, LLC14,014$322K<0.01%+3,14413F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC13,337$306K<0.01%new13F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL12,916$297K<0.01%-8,87713F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO12,672$291K<0.01%+3,08113F-HRTimelineGroup
HOHIMER WEALTH MANAGEMENT, LLC11,845$272K0.05%+3,84013F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/11,790$271K<0.01%+3,58413F-HRTimelineGroup
TEACHERS RETIREMENT SYSTEM OF THE STATE…11,691$268K<0.01%013F-HRTimeline
COMERICA BANK11,553$265K<0.01%-1013F-HRTimeline
CIM, LLC11,429$262K0.04%+1,54113F-HRTimeline
Quantinno Capital Management LP11,269$259K<0.01%new13F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.11,224$258K<0.01%-573,89113F-HRTimelineGroup
SEGALL BRYANT & HAMILL, LLC11,185$257K<0.01%013F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM11,090$255K<0.01%+7813F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC11,078$254K<0.01%-3713F-HRTimeline
Maryland State Retirement & Pension Sys…10,936$251K0.01%013F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…10,913$251K<0.01%013F-HRTimeline
AMALGAMATED BANK10,549$242K<0.01%-21213F-HRTimeline
Schonfeld Strategic Advisors LLC10,340$237K<0.01%new13F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS10,251$235K<0.01%-10713F-HRTimeline
Sterling Capital Management LLC10,217$235K<0.01%+89813F-HR/ATimeline
ProShare Advisors LLC10,039$230K<0.01%-1,03813F-HRTimeline
EXCHANGE TRADED CONCEPTS, LLC9,831$226K<0.01%+96513F-HRTimeline
PROFUND ADVISORS LLC9,638$221K0.01%-1,61813F-HRTimeline
DEERFIELD MANAGEMENT COMPANY, L.P.in group DEERFIELD MANAGEMENT COMPANY,…9,579$220K<0.01%new13F-HRTimelineGroup
China Universal Asset Management Co., L…9,468$217K0.02%-17613F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…9,440$217K<0.01%+46513F-HRTimeline
Vestcor Inc9,383$215K0.01%013F-HRTimeline
State of Tennessee, Department of Treas…9,300$214K<0.01%013F-HRTimeline
VIRGINIA RETIREMENT SYSTEMS ET Al8,762$201K<0.01%-80013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND8,442$194K<0.01%-10013F-HRTimeline
Police & Firemen's Retirement System of…8,288$190K<0.01%013F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…7,504$172K<0.01%013F-HRTimeline
KLP KAPITALFORVALTNING AS7,400$170K<0.01%013F-HRTimeline
FMR LLCin group FMR LLC7,203$165K<0.01%+2,39713F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…6,483$149K<0.01%+1,70013F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC6,344$145K<0.01%new13F-HRTimelineGroup
OAKWORTH CAPITAL, INC.6,000$138K0.01%013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…5,265$121K<0.01%013F-HRTimeline
CWM, LLCin group CWM, LLC4,502$103K<0.01%+3,83413F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD4,200$96.4K<0.01%+1,50013F-HRTimeline
SHELL ASSET MANAGEMENT CO4,173$96K<0.01%-46013F-HRTimeline
Brooklyn Investment Group3,778$86.7K0.01%+3,62913F-HR/ATimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,762$86.4K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,583$82.3K<0.01%+2,59613F-HRTimelineGroup
State of Wyoming2,723$62.5K0.01%-2,13713F-HRTimeline
IFP Advisors, Inc2,035$51.9K<0.01%+87713F-HRTimeline
GAMMA Investing LLC2,162$49.6K<0.01%+82913F-HRTimeline
Blue Trust, Inc.1,776$40.8K<0.01%+31713F-HRTimeline
TD PRIVATE CLIENT WEALTH LLC1,695$38.9K<0.01%-3213F-HRTimeline
Allworth Financial LP1,545$35.5K<0.01%-2113F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.1,377$32K<0.01%+1,33813F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
SIMPLEX TRADING, LLC1,379$31K<0.01%new13F-HRTimeline
SIGNATUREFD, LLC1,272$29.2K<0.01%+40013F-HRTimeline
MassMutual Private Wealth & Trust, FSB1,262$29K<0.01%+83113F-HRTimeline
GF FUND MANAGEMENT CO. LTD.1,230$28.2K<0.01%013F-HRTimeline
Pinnacle Financial Partners Inc1,000$23K<0.01%013F-HRTimeline
Leonteq Securities AG1,000$23K<0.01%013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…835$19.2K<0.01%-1,22313F-HRTimelineGroup
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.721$16.6K<0.01%-7613F-HRTimelineGroup
1620 INVESTMENT ADVISORS, INC.682$15.7K0.01%-1,59513F-HRTimeline
Versant Capital Management, Inc624$14.3K<0.01%+26813F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…480$11K<0.01%+10813F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\431$9.9K<0.01%+2913F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…414$9.51K<0.01%+5713F-HRTimeline
NISA INVESTMENT ADVISORS, LLC374$8.59K<0.01%-85013F-HRTimeline
Caitong International Asset Management …372$8.54K0.01%+24913F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP367$8.47K<0.01%+23613F-HRTimelineGroup
Global Retirement Partners, LLC321$7.37K<0.01%13F-HRTimeline
Truvestments Capital LLC317$7.28K<0.01%013F-HRTimeline
Parallel Advisors, LLC302$6.93K<0.01%+24413F-HRTimeline
HARBOUR INVESTMENTS, INC.270$6.2K<0.01%013F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.266$6K<0.01%+3913F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…259$5.95K<0.01%+25513F-HRTimelineGroup
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK253$5.81K<0.01%-37113F-HRTimelineGroup
BESSEMER GROUP INCin group BESSEMER GROUP INC200$5K<0.01%-36113F-HRTimelineGroup
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …199$5K<0.01%new13F-HRTimelineGroup