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Disclosery

AMPH AMPHASTAR PHARMACEUTICALS IN

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COM (common), issuer CIK 1297184

203 managers (211 13F filers) reported a position in AMPH shares at 2026-06-30, 28,318,237 shares in all. 30 filers opened a position and 32 filers sold out during the quarter.

Managers
203
13F filers
211
New
30
Added
63
Reduced
76
Sold out
32
Shares held by filers
28,318,237

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 2026

Filers in the available 13F reports with a share position at 2026-06-30, 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.5,224,934$105M<0.01%-196,40913F-HRTimelineGroup
VANGUARD GROUP INCgroup of 8 filers holding2,636,142$53.2M-19,331Timeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP2,305,107$46.5M0.01%+277,16013F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP1,642,126$33.1M<0.01%+34,61113F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC1,176,626$23.7M0.01%+159,08813F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP1,066,322$21.5M0.02%+40,68213F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC969,840$19.6M<0.01%-6,81013F-HRTimelineGroup
FULLER & THALER ASSET MANAGEMENT, INC.949,238$19.2M0.05%-445,90113F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.887,048$17.9M0.01%+221,50613F-HRTimelineGroup
LSV ASSET MANAGEMENT642,014$13M0.02%-9,70013F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC525,100$10.6M0.01%-28,80013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC505,360$10.2M<0.01%+175,97213F-HRTimelineGroup
SYSTEMATIC FINANCIAL MANAGEMENT LP437,384$8.83M0.18%-15,51413F-HRTimeline
UBS Group AGgroup of 2 filers holding437,172$8.82M-38,466Timeline
MORGAN STANLEYin group MORGAN STANLEY434,840$8.78M<0.01%+14,50313F-HRTimelineGroup
HRT FINANCIAL LP387,530$7.82M0.01%+331,34913F-HRTimeline
DENALI ADVISORS LLC375,965$7.59M0.76%+109,50013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP370,991$7.49M<0.01%-1,28813F-HRTimelineGroup
Bridge City Capital, LLC338,708$6.84M1.56%+3,60313F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co310,178$6.26M<0.01%-10,86113F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC298,954$6.03M0.11%-31,50313F-HRTimeline
ROYCE & ASSOCIATES LP294,758$5.95M0.05%-111,41713F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP248,115$5.01M<0.01%+109,96713F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP246,951$4.98M<0.01%+96,36013F-HRTimelineGroup
Pacer Advisors, Inc.241,181$4.87M0.01%-20,30213F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp232,343$4.69M<0.01%-10,88313F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC208,651$4.21M<0.01%+129,87313F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC204,250$4.12M<0.01%-4,88113F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND181,122$3.66M<0.01%+32,40013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC178,734$3.61M<0.01%+86,25913F-HRTimelineGroup
Empowered Funds, LLC162,812$3.29M0.02%-18,52013F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC159,427$3.22M0.01%+55,49813F-HRTimeline
Invesco Ltd.in group Invesco Ltd.158,064$3.19M<0.01%-446,71013F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC149,612$3.02M<0.01%-100,00513F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …139,402$2.81M<0.01%013F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/136,824$2.76M<0.01%-37,49913F-HRTimelineGroup
ALGERT GLOBAL LLC131,400$2.65M0.03%+69,04013F-HRTimeline
LAM GROUP, INC.130,800$2.64M1.31%013F-HRTimeline
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …126,931$2.56M<0.01%+3,10713F-HRTimelineGroup
BESSEMER GROUP INCin group BESSEMER GROUP INC121,345$2.45M<0.01%-70113F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …116,653$2.35M<0.01%-208,63813F-HRTimelineGroup
Public Sector Pension Investment Board116,648$2.35M0.01%-9,92613F-HR/ATimeline
Nuveen, LLCin group TIAA88,397$1.78M<0.01%+11,80213F-HRTimelineGroup
EXCHANGE TRADED CONCEPTS, LLC87,054$1.76M0.01%+4,63813F-HR/ATimeline
RHUMBLINE ADVISERS80,454$1.62M<0.01%-3,26713F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC78,795$1.59M<0.01%+50,45013F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc78,281$1.58M<0.01%-2,63513F-HRTimelineGroup
ASSETMARK, INCin group ASSETMARK, INC68,590$1.38M<0.01%+14,85213F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC68,244$1.38M<0.01%-10,53113F-HRTimelineGroup
Robeco Institutional Asset Management B…in group Robeco Institutional Asset Ma…66,407$1.34M<0.01%013F-HRTimelineGroup
Swiss National Bank64,800$1.31M<0.01%-7,80013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO57,563$1.19M<0.01%-47,01113F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC56,781$1.15M0.01%new13F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN55,913$1.13M<0.01%+13,89413F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC55,779$1.13M<0.01%+19,87513F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.54,964$1.11M<0.01%new13F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.56,430$1.11M<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS54,663$1.1M<0.01%-101,41413F-HRTimelineGroup
Creative Planningin group Creative Planning51,444$1.04M<0.01%+35,04113F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/51,103$1.03M<0.01%+6,20013F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC50,912$1.03M<0.01%-120,27613F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…50,565$1.02M<0.01%+35,96413F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC49,839$1.01M0.01%+25,63213F-HRTimeline
SteelPeak Wealth, LLC48,684$982K0.03%+22213F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd46,808$945K0.01%-40,92813F-HRTimelineGroup
Polaris Capital Management, LLC43,232$872K0.08%013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…36,151$730K<0.01%+7,85213F-HR/ATimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\35,307$712K<0.01%+2,17613F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC35,133$709K<0.01%-15,56013F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd34,704$700K0.01%new13F-HRTimeline
Vident Advisory, LLCin group Vident Advisory, LLC34,221$691K0.01%+10,97713F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…34,201$690K0.01%+22,58713F-HRTimelineGroup
Legato Capital Management LLC34,135$689K0.06%013F-HRTimeline
Janney Montgomery Scott LLC33,841$683K<0.01%+20,02413F-HRTimeline
SEGALL BRYANT & HAMILL, LLC33,318$672K0.01%013F-HRTimeline
SummerHaven Investment Management, LLC32,633$659K0.35%013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC31,814$642K<0.01%-339,55913F-HRTimelineGroup
SG Americas Securities, LLC31,709$640K<0.01%-1,09713F-HRTimeline
Engineers Gate Manager LP30,191$609K0.01%new13F-HRTimeline
Illumine Investment Management, LLC0$594K0.39%-28,07813F-HRTimelineAmount filed as zero, left out of ratios.
FMR LLCin group FMR LLC28,958$584K<0.01%+27,66413F-HRTimelineGroup
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co26,787$541K<0.01%-3,42913F-HRTimelineGroup
State of Alaska, Department of Revenue26,433$531K0.01%-97713F-HRTimeline
Advisor OS, LLCin group Advisor OS, LLC25,405$513K0.03%013F-HRTimelineGroup
ADVISORY RESEARCH INC25,337$511K0.05%+213F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC25,217$509K<0.01%+3,93413F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources24,986$504K<0.01%-114,31913F-HRTimelineGroup
Quadrature Capital Ltdin group Quadrature Capital Ltd24,428$493K<0.01%-6,13313F-HRTimelineGroup
Campbell & CO Investment Adviser LLC23,211$468K0.02%new13F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…22,295$450K<0.01%-1,32313F-HRTimelineGroup
NEW YORK STATE TEACHERS RETIREMENT SYST…21,180$427K<0.01%-64513F-HRTimeline
Quantinno Capital Management LP20,827$420K<0.01%new13F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…20,761$419K<0.01%013F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC19,313$390K<0.01%+25813F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…18,108$365K<0.01%+14,66313F-HRTimelineGroup
Illinois Municipal Retirement Fund17,452$352K<0.01%-2,07613F-HRTimeline
Man Group plcin group Man Group plc17,342$350K<0.01%-19,93213F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD17,039$344K<0.01%-34913F-HRTimeline
Jupiter Topco LLCin group Janus Henderson16,868$340K<0.01%13F-HRTimelineGroup
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding16,845$340K-2,367Timeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC16,231$328K<0.01%-49,30913F-HRTimelineGroup
Assenagon Asset Management S.A.15,216$307K<0.01%013F-HR/ATimeline
Louisiana State Employees Retirement Sy…14,900$301K<0.01%-80013F-HR/ATimeline
FOX RUN MANAGEMENT, L.L.C.14,556$294K0.05%new13F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …14,247$288K<0.01%-1,63213F-HRTimelineGroup
Jain Global LLC14,183$286K<0.01%new13F-HRTimeline
HOHIMER WEALTH MANAGEMENT, LLC13,128$265K0.03%+6213F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.12,742$257K<0.01%-29813F-HRTimelineGroup
PROFUND ADVISORS LLC12,015$242K0.01%+1,35713F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC11,999$242K<0.01%-6,26913F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD11,500$232K<0.01%-4,80013F-HRTimeline
ALLSTATE CORPin group ALLSTATE CORP11,353$229K<0.01%new13F-HRTimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…10,913$220K<0.01%013F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC10,906$220K<0.01%-32913F-HRTimelineGroup
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…10,440$211K<0.01%-2,12413F-HRTimelineGroup
Significant Wealth Partners LLC10,424$210K0.23%new13F-HRTimeline
Police & Firemen's Retirement System of…10,263$207K<0.01%013F-HRTimeline
Gotham Asset Management, LLC10,139$205K<0.01%new13F-HRTimeline
Sterling Capital Management LLC9,912$200K<0.01%-47313F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…9,053$182K<0.01%013F-HRTimeline
State of Tennessee, Department of Treas…8,619$174K<0.01%013F-HRTimeline
KLP KAPITALFORVALTNING AS7,900$159K<0.01%013F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…7,783$157K<0.01%013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND7,742$156K<0.01%-30013F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…7,300$147K<0.01%-1,45013F-HRTimelineGroup
State of Wyoming7,022$142K0.01%new13F-HRTimeline
China Universal Asset Management Co., L…7,017$142K0.01%-1,03413F-HRTimeline
Corient IA LPin group Corient Private Wealth LP6,670$135K0.12%013F-HRTimelineGroup
Vestcor Inc5,743$116K<0.01%-5,20613F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…5,265$106K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…5,004$101K<0.01%-44513F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA4,739$97K<0.01%+1,21613F-HRTimelineGroup
Basecamp Wealth Advisors LLC4,416$89.1K0.02%+6013F-HRTimeline
New Age Alpha Advisors, LLC3,147$63.5K<0.01%new13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,101$62.6K<0.01%013F-HRTimelineGroup
Parallel Advisors, LLC2,988$60.3K<0.01%+2,33113F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.2,910$58.7K<0.01%-11,16913F-HRTimelineGroup
HANTZ FINANCIAL SERVICES, INC.2,417$49K<0.01%+39013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
TD PRIVATE CLIENT WEALTH LLC2,379$48K<0.01%013F-HRTimeline
Quantbot Technologies LP1,924$38.8K<0.01%new13F-HRTimeline
Arax Advisory Partners1,807$36.5K<0.01%+1,74713F-HRTimeline
Fulcrum Asset Management LLP1,750$36.2K<0.01%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,514$30.6K<0.01%-2,40413F-HRTimelineGroup
Blue Trust, Inc.1,273$25.7K<0.01%-33413F-HRTimeline
CX Institutional1,259$25K<0.01%-1,71413F-HRTimeline
Pinnacle Wealth Planning Services, Inc.1,165$23.5K<0.01%+88213F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\1,119$22.6K<0.01%+80113F-HRTimelineGroup
GF FUND MANAGEMENT CO. LTD.963$19.4K<0.01%-6113F-HRTimeline
Farther Finance Advisors, LLC774$15.7K<0.01%-36213F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…754$15.2K<0.01%+16513F-HRTimeline
1620 INVESTMENT ADVISORS, INC.615$12.4K0.01%-10313F-HRTimeline
Nykredit A/Sin group Nykredit A/S595$12K<0.01%13F-HRTimelineGroup
Allworth Financial LP563$11.4K<0.01%+52013F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK525$10.6K<0.01%new13F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC502$10.1K<0.01%+14113F-HRTimeline
MassMutual Private Wealth & Trust, FSB433$8.74K<0.01%+20913F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.391$8K<0.01%013F-HRTimeline
GAMMA Investing LLC312$6.3K<0.01%-2713F-HRTimeline
UMB Bank, n.a.292$5.89K<0.01%+11213F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Global Retirement Partners, LLC291$5.87K<0.01%13F-HRTimeline
Smartleaf Asset Management LLC273$5.65K<0.01%013F-HRTimeline
SIGNATUREFD, LLC277$5.59K<0.01%-31113F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP228$4.97K<0.01%-6013F-HRTimelineGroup
Aster Capital Management (DIFC) Ltd238$4.8K<0.01%new13F-HR/ATimeline
Versant Capital Management, Inc218$4.4K<0.01%013F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC217$4.38K<0.01%013F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management206$4.16K<0.01%013F-HRTimelineGroup
Integrated Wealth Concepts LLC204$4.12K<0.01%new13F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.192$3.88K<0.01%+16413F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC177$3.57K<0.01%+17613F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…152$3.07K<0.01%+12813F-HRTimelineGroup
City State Bank150$3.03K<0.01%013F-HRTimeline
WealthCollab, LLC116$2.34K<0.01%+5213F-HRTimeline
Bank of New Hampshire110$2.22K<0.01%-9613F-HRTimeline
MCF Advisors LLC100$2.02K<0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…100$2.02K<0.01%013F-HRTimeline
Essential Partners LLC90$1.82K<0.01%-3113F-HRTimeline
Salomon & Ludwin, LLC81$1.63K<0.01%new13F-HRTimeline
IFP Advisors, Inc70$1.41K<0.01%013F-HRTimeline
HighMark Wealth Management LLC55$1.11K<0.01%013F-HRTimeline
SBI Securities Co., Ltd.51$1.03K<0.01%+713F-HRTimeline
Covestor Ltd65$1K<0.01%+2813F-HRTimeline
ZIONS BANCORPORATION, NATIONAL ASSOCIAT…37$747<0.01%new13F-HRTimeline
Wealth Enhancement Trust Services, Inc.35$706<0.01%new13F-HR/ATimeline
Keating Financial Advisory Services, In…28$565<0.01%new13F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…25$505<0.01%013F-HRTimelineGroup
Bare Financial Services, Inc23$464<0.01%-2313F-HRTimeline
Larson Financial Group LLC20$404<0.01%013F-HRTimeline
Clearstead Advisors, LLC17$344<0.01%new13F-HRTimeline
Continuum Advisory, LLC17$343<0.01%new13F-HRTimeline
Trust Co15$303<0.01%013F-HRTimeline
Torren Management, LLC15$303<0.01%013F-HRTimeline
Elequin Capital, LP11$222<0.01%+413F-HRTimeline
GILPIN WEALTH MANAGEMENT, LLC8$162<0.01%+313F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…7$141<0.01%-11713F-HRTimelineGroup
JFS WEALTH ADVISORS, LLC6$122<0.01%new13F-HRTimeline
SJS Investment Consulting Inc.6$122<0.01%new13F-HRTimeline
JPL Wealth Management, LLC5$101<0.01%new13F-HRTimeline
Abound Wealth Management4$81<0.01%013F-HRTimeline
Davis Capital Management2$40<0.01%new13F-HRTimeline