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Hedge Funds Tracker

AMPH

Amphastar Pharmaceuticals, Inc.
Funds Buying10
Funds Selling16
# Funds Holding26
Total Value Held$288.3M

Current Holders

FundSharesValue% of PortfolioAs OfLatest MoveLatest Share Change
Context Capital Management93,631,000$85.2M2%2026-06-30ADDED+26,700,000
Neuberger Berman1,374,125$51.0M0%2024-12-31CLOSED-1,374,125
Oaktree Capital Management40,880,000$37.2M0%2026-06-30ADDED+2,844,000
Marshall Wace1,066,322$21.5M0%2026-06-30ADDED+40,682
Geode Capital Management969,840$19.6M0%2026-06-30TRIMMED-6,810
D. E. Shaw & Co.887,048$17.9M0%2026-06-30ADDED+221,506
Renaissance Technologies525,100$10.6M0%2026-06-30TRIMMED-28,800
Capstone Investment Advisors10,080,000$9.2M0%2026-06-30NEW+10,080,000
Charles Schwab Investment Management310,178$6.3M0%2026-06-30TRIMMED-10,861
Two Sigma Investments248,115$5.0M0%2026-06-30ADDED+109,967
Silverback Asset Management5,080,000$4.6M0%2026-03-31CLOSED-5,080,000
AQR Capital Management208,651$4.2M0%2026-06-30ADDED+129,873
Victory Capital Management149,612$3.0M0%2026-06-30TRIMMED-100,005
Qube Research & Technologies111,439$3.0M0%2025-12-31CLOSED-111,439
Arrowstreet Capital116,653$2.4M0%2026-06-30TRIMMED-208,638
Monashee Investment Management39,461$1.8M0%2023-09-30CLOSED-39,461
Squarepoint Ops78,795$1.6M0%2026-06-30ADDED+50,450
Point72 Asset Management54,964$1.1M0%2026-06-30NEW+54,964
Citadel Advisors37,631$0.8M0%2026-06-30TRIMMED-47,809
Millennium Management31,814$0.6M0%2026-06-30ADDED+33,628,627
Graham Capital Management20,288$0.5M0%2025-06-30CLOSED-20,288
Verition Fund Management18,597$0.4M0%2026-03-31CLOSED-18,597
Man Group17,342$0.3M0%2026-06-30TRIMMED-19,932
Walleye Capital8,666$0.3M0%2024-12-31CLOSED-8,666
Schonfeld Strategic Advisors10,340$0.2M0%2025-06-30CLOSED-10,340
Fisher Asset Management58$0.0M0%2023-12-31CLOSED-58

Move History

QuarterFundActionPrev SharesNew SharesValue Change
2026-03-31 → 2026-06-30Renaissance TechnologiesTRIMMED553,900525,100-$0.3M
2026-03-31 → 2026-06-30Citadel AdvisorsTRIMMED85,44037,631-$0.9M
2026-03-31 → 2026-06-30Point72 Asset ManagementNEW054,964$1.1M
2026-03-31 → 2026-06-30D. E. Shaw & Co.ADDED665,542887,048$4.9M
2026-03-31 → 2026-06-30Two Sigma InvestmentsADDED138,148248,115$2.3M
2026-03-31 → 2026-06-30Millennium ManagementADDED371,37334,000,000$23.7M
2026-03-31 → 2026-06-30AQR Capital ManagementADDED78,778208,651$2.7M
2026-03-31 → 2026-06-30Marshall WaceADDED1,025,6401,066,322$1.4M
2026-03-31 → 2026-06-30Arrowstreet CapitalTRIMMED325,291116,653-$4.0M
2026-03-31 → 2026-06-30Oaktree Capital ManagementADDED38,036,00040,880,000$2.7M
2026-03-31 → 2026-06-30Geode Capital ManagementTRIMMED976,650969,840$0.4M
2026-03-31 → 2026-06-30Charles Schwab Investment ManagementTRIMMED321,039310,178-$0.0M
2026-03-31 → 2026-06-30Victory Capital ManagementTRIMMED249,617149,612-$1.9M
2026-03-31 → 2026-06-30Verition Fund ManagementCLOSED18,5970-$0.4M
2026-03-31 → 2026-06-30Squarepoint OpsADDED28,34578,795$1.0M
2026-03-31 → 2026-06-30Capstone Investment AdvisorsNEW010,080,000$9.2M
2026-03-31 → 2026-06-30Man GroupTRIMMED37,27417,342-$0.4M
2026-03-31 → 2026-06-30Context Capital ManagementADDED66,931,00093,631,000$24.6M
2026-03-31 → 2026-06-30Silverback Asset ManagementCLOSED5,080,0000-$4.6M
2025-12-31 → 2026-03-31Renaissance TechnologiesADDED544,700553,900-$3.7M
2025-12-31 → 2026-03-31Citadel AdvisorsTRIMMED241,02485,440-$4.8M
2025-12-31 → 2026-03-31D. E. Shaw & Co.ADDED557,066665,542-$1.9M
2025-12-31 → 2026-03-31Two Sigma InvestmentsADDED98,678138,148$0.1M
2025-12-31 → 2026-03-31Millennium ManagementADDED290,673371,373-$0.5M
2025-12-31 → 2026-03-31AQR Capital ManagementADDED67,65278,778-$0.3M
2025-12-31 → 2026-03-31Marshall WaceTRIMMED1,237,2841,025,640-$13.0M
2025-12-31 → 2026-03-31Arrowstreet CapitalTRIMMED559,426325,291-$8.6M
2025-12-31 → 2026-03-31Oaktree Capital ManagementTRIMMED43,578,00038,036,000-$5.9M
2025-12-31 → 2026-03-31Geode Capital ManagementADDED886,825976,650-$4.6M
2025-12-31 → 2026-03-31Charles Schwab Investment ManagementTRIMMED350,707321,039-$3.1M
2025-12-31 → 2026-03-31Victory Capital ManagementTRIMMED305,161249,617-$3.3M
2025-12-31 → 2026-03-31Verition Fund ManagementNEW018,597$0.4M
2025-12-31 → 2026-03-31Squarepoint OpsADDED14,86028,345$0.2M
2025-12-31 → 2026-03-31Qube Research & TechnologiesCLOSED111,4390-$3.0M
2025-12-31 → 2026-03-31Man GroupADDED14,15137,274$0.4M
2025-12-31 → 2026-03-31Context Capital ManagementADDED31,700,00066,931,000$31.3M
2025-12-31 → 2026-03-31Silverback Asset ManagementTRIMMED9,080,0005,080,000-$3.8M
2025-09-30 → 2025-12-31Renaissance TechnologiesTRIMMED586,900544,700-$1.1M
2025-09-30 → 2025-12-31Citadel AdvisorsTRIMMED253,775241,024-$0.3M
2025-09-30 → 2025-12-31D. E. Shaw & Co.ADDED517,222557,066$1.1M
2025-09-30 → 2025-12-31Millennium ManagementTRIMMED697,765290,673-$10.8M
2025-09-30 → 2025-12-31AQR Capital ManagementADDED62,14567,652$0.2M
2025-09-30 → 2025-12-31Marshall WaceADDED874,0681,237,284$9.8M
2025-09-30 → 2025-12-31Arrowstreet CapitalADDED392,310559,426$4.5M
2025-09-30 → 2025-12-31Oaktree Capital ManagementADDED17,825,00043,578,000$24.2M
2025-09-30 → 2025-12-31Geode Capital ManagementTRIMMED922,577886,825-$0.8M
2025-09-30 → 2025-12-31Charles Schwab Investment ManagementTRIMMED356,409350,707-$0.1M
2025-09-30 → 2025-12-31Victory Capital ManagementADDED211,800305,161$2.5M
2025-09-30 → 2025-12-31Squarepoint OpsTRIMMED49,31014,860-$0.9M
2025-09-30 → 2025-12-31Qube Research & TechnologiesTRIMMED241,212111,439-$3.4M
2025-09-30 → 2025-12-31Man GroupTRIMMED32,38514,151-$0.5M
2025-09-30 → 2025-12-31Context Capital ManagementADDED19,20031,700,000$11.9M
2025-09-30 → 2025-12-31Silverback Asset ManagementTRIMMED10,008,0009,080,000-$0.7M
2025-06-30 → 2025-09-30Renaissance TechnologiesADDED576,500586,900$2.4M
2025-06-30 → 2025-09-30Citadel AdvisorsTRIMMED322,945253,775-$0.7M
2025-06-30 → 2025-09-30D. E. Shaw & Co.ADDED293,928517,222$7.0M
2025-06-30 → 2025-09-30Two Sigma InvestmentsADDED80,13098,678$0.8M
2025-06-30 → 2025-09-30Millennium ManagementADDED618,984697,765$4.4M
2025-06-30 → 2025-09-30AQR Capital ManagementTRIMMED75,84562,145-$0.1M
2025-06-30 → 2025-09-30Marshall WaceADDED848,685874,068$3.8M
2025-06-30 → 2025-09-30Arrowstreet CapitalADDED81,239392,310$8.6M
2025-06-30 → 2025-09-30Oaktree Capital ManagementNEW017,825,000$16.2M
2025-06-30 → 2025-09-30Geode Capital ManagementTRIMMED973,237922,577$2.2M
2025-06-30 → 2025-09-30Charles Schwab Investment ManagementADDED346,784356,409$1.5M
2025-06-30 → 2025-09-30Victory Capital ManagementADDED76,862211,800$3.9M
2025-06-30 → 2025-09-30Squarepoint OpsADDED23,02649,310$0.8M
2025-06-30 → 2025-09-30Schonfeld Strategic AdvisorsCLOSED10,3400-$0.2M
2025-06-30 → 2025-09-30Qube Research & TechnologiesTRIMMED469,492241,212-$4.4M
2025-06-30 → 2025-09-30Graham Capital ManagementCLOSED20,2880-$0.5M
2025-06-30 → 2025-09-30Man GroupADDED20,30032,385$0.4M
2025-06-30 → 2025-09-30Context Capital ManagementTRIMMED27,20019,200-$6.1M
2025-06-30 → 2025-09-30Silverback Asset ManagementADDED4,923,00010,008,000$4.8M
2025-03-31 → 2025-06-30Renaissance TechnologiesADDED495,000576,500-$1.1M
2025-03-31 → 2025-06-30Citadel AdvisorsADDED188,379322,945$2.0M
2025-03-31 → 2025-06-30D. E. Shaw & Co.ADDED29,188293,928$5.9M
2025-03-31 → 2025-06-30Two Sigma InvestmentsADDED75,32880,130-$0.3M
2025-03-31 → 2025-06-30Millennium ManagementTRIMMED868,551618,984-$11.0M
2025-03-31 → 2025-06-30AQR Capital ManagementADDED53,63875,845$0.2M
2025-03-31 → 2025-06-30Marshall WaceTRIMMED1,031,722848,685-$10.4M
2025-03-31 → 2025-06-30Arrowstreet CapitalNEW081,239$1.9M
2025-03-31 → 2025-06-30Geode Capital ManagementADDED955,076973,237-$5.3M
2025-03-31 → 2025-06-30Charles Schwab Investment ManagementADDED326,226346,784-$1.5M
2025-03-31 → 2025-06-30Victory Capital ManagementTRIMMED81,08776,862-$0.6M
2025-03-31 → 2025-06-30Squarepoint OpsTRIMMED69,77023,026-$1.5M
2025-03-31 → 2025-06-30Schonfeld Strategic AdvisorsNEW010,340$0.2M
2024-12-31 → 2025-06-30Qube Research & TechnologiesADDED115,292469,492$6.5M
2025-03-31 → 2025-06-30Graham Capital ManagementTRIMMED26,42420,288-$0.3M
2025-03-31 → 2025-06-30Man GroupTRIMMED38,23720,300-$0.6M
2025-03-31 → 2025-06-30Context Capital ManagementADDED25,70027,200$0.7M
2025-03-31 → 2025-06-30Silverback Asset ManagementTRIMMED8,423,0004,923,000-$3.2M
2024-12-31 → 2025-03-31Renaissance TechnologiesTRIMMED525,500495,000-$5.2M
2024-12-31 → 2025-03-31Citadel AdvisorsTRIMMED6,000,000188,379-$0.1M
2024-12-31 → 2025-03-31Point72 Asset ManagementCLOSED9,2000-$0.3M
2024-12-31 → 2025-03-31D. E. Shaw & Co.TRIMMED118,85129,188-$3.6M
2024-12-31 → 2025-03-31Two Sigma InvestmentsTRIMMED98,18475,328-$1.5M
2024-12-31 → 2025-03-31Millennium ManagementADDED256,556868,551$15.7M
2024-12-31 → 2025-03-31AQR Capital ManagementADDED29,47153,638$0.5M
2024-12-31 → 2025-03-31Marshall WaceADDED608,7061,031,722$7.3M
2024-12-31 → 2025-03-31Neuberger BermanCLOSED1,374,1250-$51.0M
2024-12-31 → 2025-03-31Geode Capital ManagementADDED916,081955,076-$6.3M
2024-12-31 → 2025-03-31Charles Schwab Investment ManagementTRIMMED347,512326,226-$3.4M
2024-12-31 → 2025-03-31Victory Capital ManagementADDED63,38781,087-$0.0M
2024-12-31 → 2025-03-31Verition Fund ManagementCLOSED6,3380-$0.2M
2024-12-31 → 2025-03-31Walleye CapitalCLOSED8,6660-$0.3M
2024-12-31 → 2025-03-31Squarepoint OpsADDED17,66469,770$1.4M
2024-12-31 → 2025-03-31Schonfeld Strategic AdvisorsCLOSED42,6140-$1.6M
2024-12-31 → 2025-03-31Graham Capital ManagementNEW026,424$0.8M
2024-12-31 → 2025-03-31Man GroupADDED21,82538,237$0.3M
2024-12-31 → 2025-03-31Context Capital ManagementADDED4,00025,700$19.2M
2024-12-31 → 2025-03-31Silverback Asset ManagementNEW08,423,000$7.5M
2024-09-30 → 2024-12-31Renaissance TechnologiesADDED489,400525,500-$4.2M
2024-09-30 → 2024-12-31Citadel AdvisorsADDED163,3376,000,000-$2.3M
2024-09-30 → 2024-12-31Point72 Asset ManagementTRIMMED38,8179,200-$1.5M
2024-09-30 → 2024-12-31D. E. Shaw & Co.ADDED23,659118,851$3.3M
2024-09-30 → 2024-12-31Two Sigma InvestmentsTRIMMED98,79898,184-$1.1M
2024-09-30 → 2024-12-31Millennium ManagementTRIMMED259,650256,556-$3.1M
2024-09-30 → 2024-12-31AQR Capital ManagementTRIMMED41,66729,471-$0.9M
2024-09-30 → 2024-12-31Marshall WaceADDED568,494608,706-$5.0M
2024-09-30 → 2024-12-31Neuberger BermanTRIMMED1,615,0881,374,125-$27.4M
2024-09-30 → 2024-12-31Geode Capital ManagementTRIMMED920,363916,081-$10.7M
2024-09-30 → 2024-12-31Charles Schwab Investment ManagementTRIMMED350,056347,512-$4.1M
2024-09-30 → 2024-12-31Victory Capital ManagementTRIMMED218,53163,387-$8.3M
2024-09-30 → 2024-12-31Verition Fund ManagementADDED5,1626,338-$0.0M
2024-09-30 → 2024-12-31Walleye CapitalNEW08,666$0.3M
2024-09-30 → 2024-12-31Squarepoint OpsADDED5,73517,664$0.4M
2024-09-30 → 2024-12-31Schonfeld Strategic AdvisorsADDED9,60742,614$1.1M
2024-09-30 → 2024-12-31Qube Research & TechnologiesTRIMMED116,678115,292-$1.4M
2024-09-30 → 2024-12-31Man GroupNEW021,825$0.8M
2024-09-30 → 2024-12-31Context Capital ManagementTRIMMED6,5004,000-$3.2M
2024-06-30 → 2024-09-30Renaissance TechnologiesTRIMMED537,700489,400$2.2M
2024-06-30 → 2024-09-30Citadel AdvisorsTRIMMED274,951163,337-$3.1M
2024-06-30 → 2024-09-30Point72 Asset ManagementTRIMMED235,83638,817-$7.5M
2024-06-30 → 2024-09-30D. E. Shaw & Co.NEW023,659$1.1M
2024-06-30 → 2024-09-30Two Sigma InvestmentsADDED96,43098,798$0.9M
2024-06-30 → 2024-09-30Millennium ManagementTRIMMED738,748259,650-$16.9M
2024-06-30 → 2024-09-30AQR Capital ManagementTRIMMED55,79641,667-$0.2M
2024-06-30 → 2024-09-30Marshall WaceADDED227,127568,494$18.5M
2024-06-30 → 2024-09-30Neuberger BermanTRIMMED1,622,6091,615,088$13.5M
2024-06-30 → 2024-09-30Geode Capital ManagementADDED906,348920,363$8.4M
2024-06-30 → 2024-09-30Charles Schwab Investment ManagementTRIMMED359,222350,056$2.6M
2024-06-30 → 2024-09-30Victory Capital ManagementADDED197,001218,531$2.7M
2024-06-30 → 2024-09-30Verition Fund ManagementTRIMMED6,5115,162-$0.0M
2024-06-30 → 2024-09-30Walleye CapitalCLOSED5,0170-$0.2M
2024-06-30 → 2024-09-30Squarepoint OpsTRIMMED90,5525,735-$3.3M
2024-06-30 → 2024-09-30Schonfeld Strategic AdvisorsTRIMMED11,7509,607-$0.0M
2024-06-30 → 2024-09-30Qube Research & TechnologiesTRIMMED206,219116,678-$2.6M
2024-06-30 → 2024-09-30Capstone Investment AdvisorsCLOSED7,9440-$0.3M
2024-06-30 → 2024-09-30Man GroupCLOSED8,7760-$0.4M
2024-06-30 → 2024-09-30Context Capital ManagementNEW06,500$6.9M
2024-03-31 → 2024-06-30Renaissance TechnologiesTRIMMED599,100537,700$21.5M
2024-03-31 → 2024-06-30Citadel AdvisorsADDED94,797274,951$6.8M
2024-03-31 → 2024-06-30Point72 Asset ManagementTRIMMED262,400235,836-$2.1M
2024-03-31 → 2024-06-30Two Sigma InvestmentsTRIMMED96,80496,430-$0.4M
2024-03-31 → 2024-06-30Millennium ManagementADDED400,095738,748$12.0M
2024-03-31 → 2024-06-30AQR Capital ManagementTRIMMED57,05455,796-$0.3M
2024-03-31 → 2024-06-30Marshall WaceNEW0227,127$9.1M
2024-03-31 → 2024-06-30Neuberger BermanTRIMMED1,659,8171,622,609-$8.0M
2024-03-31 → 2024-06-30Arrowstreet CapitalCLOSED22,5390-$0.0M
2024-03-31 → 2024-06-30Geode Capital ManagementADDED866,032906,348-$1.8M
2024-03-31 → 2024-06-30Charles Schwab Investment ManagementADDED356,405359,222-$1.3M
2024-03-31 → 2024-06-30Victory Capital ManagementTRIMMED212,686197,001-$1.5M
2024-03-31 → 2024-06-30Verition Fund ManagementNEW06,511$0.3M
2024-03-31 → 2024-06-30Walleye CapitalNEW05,017$0.2M
2024-03-31 → 2024-06-30Squarepoint OpsADDED82,05190,552$0.0M
2024-03-31 → 2024-06-30Schonfeld Strategic AdvisorsADDED6,22911,750$0.2M
2024-03-31 → 2024-06-30Qube Research & TechnologiesADDED125,835206,219$2.7M
2024-03-31 → 2024-06-30Capstone Investment AdvisorsNEW07,944$0.3M
2024-03-31 → 2024-06-30Graham Capital ManagementCLOSED6,3390-$0.3M
2024-03-31 → 2024-06-30Man GroupNEW08,776$0.4M
2023-12-31 → 2024-03-31Renaissance TechnologiesTRIMMED641,900599,100-$0.0M
2023-12-31 → 2024-03-31Citadel AdvisorsTRIMMED136,09994,797-$4.3M
2023-12-31 → 2024-03-31Point72 Asset ManagementNEW0262,400$11.5M
2023-12-31 → 2024-03-31D. E. Shaw & Co.CLOSED77,0800-$4.8M
2023-12-31 → 2024-03-31Two Sigma InvestmentsADDED41,77596,804$1.7M
2023-12-31 → 2024-03-31Millennium ManagementADDED205,017400,095$4.9M
2023-12-31 → 2024-03-31Fisher Asset ManagementCLOSED580-$0.0M
2023-12-31 → 2024-03-31AQR Capital ManagementADDED12,74457,054$1.7M
2023-12-31 → 2024-03-31Neuberger BermanTRIMMED1,693,0021,659,817-$31.8M
2023-12-31 → 2024-03-31Arrowstreet CapitalNEW022,539$0.0M
2023-12-31 → 2024-03-31Geode Capital ManagementADDED846,652866,032-$14.3M
2023-12-31 → 2024-03-31Charles Schwab Investment ManagementTRIMMED379,480356,405-$7.8M
2023-12-31 → 2024-03-31Victory Capital ManagementTRIMMED237,474212,686-$5.3M
2023-12-31 → 2024-03-31Squarepoint OpsTRIMMED83,44482,051-$1.6M
2023-12-31 → 2024-03-31Schonfeld Strategic AdvisorsNEW06,229$0.3M
2023-12-31 → 2024-03-31Qube Research & TechnologiesADDED55,404125,835$2.1M
2023-12-31 → 2024-03-31Graham Capital ManagementNEW06,339$0.3M
2023-09-30 → 2023-12-31Renaissance TechnologiesADDED603,100641,900$0.0M
2023-09-30 → 2023-12-31Citadel AdvisorsTRIMMED140,115136,099$2.0M
2023-09-30 → 2023-12-31Point72 Asset ManagementCLOSED1,2830-$0.1M
2023-09-30 → 2023-12-31D. E. Shaw & Co.TRIMMED100,17377,080$0.2M
2023-09-30 → 2023-12-31Two Sigma InvestmentsTRIMMED95,48441,775-$1.8M
2023-09-30 → 2023-12-31Millennium ManagementTRIMMED296,307205,017-$0.9M
2023-09-30 → 2023-12-31AQR Capital ManagementTRIMMED28,99012,744-$0.5M
2023-09-30 → 2023-12-31Neuberger BermanADDED1,487,9791,693,002$36.3M
2023-09-30 → 2023-12-31Arrowstreet CapitalCLOSED28,2300-$0.0M
2023-09-30 → 2023-12-31Geode Capital ManagementADDED809,626846,652$15.1M
2023-09-30 → 2023-12-31Charles Schwab Investment ManagementADDED352,378379,480$7.3M
2023-09-30 → 2023-12-31Victory Capital ManagementADDED24,460237,474$13.6M
2023-09-30 → 2023-12-31Verition Fund ManagementCLOSED8,5970-$0.4M
2023-09-30 → 2023-12-31Walleye CapitalCLOSED39,8540-$1.8M
2023-09-30 → 2023-12-31Squarepoint OpsTRIMMED101,50283,444$0.5M
2023-09-30 → 2023-12-31Qube Research & TechnologiesTRIMMED102,32455,404-$1.3M
2023-09-30 → 2023-12-31Monashee Investment ManagementCLOSED39,4610-$1.8M