Amphastar Pharmaceutical

Q2 2026 vs Q3 2026

Comparing institutional holders between quarters

Compare Detailed Historical Funds Options 13D/13G Peers Targeting Trading Summary Profile

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Union Bancaire Privee, UBP SA

NEW

Shares345,000,000

Change+345,000,000

Value$93

Filed 2026-11-04

Context Capital Management, LLC

DECREASED

Shares90,318,000 from 93,631,000

Change-3,313,000 (-4%)

Value$84.6M (-$604.4K)

Filed 2026-11-04

Russell Investments Group, Ltd.

INCREASED

Shares6,878,000 from 6,007,000

Change+871,000 (+15%)

Value$6.4M (+$926.7K)

Filed 2026-11-06

Calamos Advisors LLC

UNCHANGED

Shares5,000,000 from 5,000,000

Change0 (0%)

Value$4.7M (+$119.2K)

Filed 2026-11-02

Nykredit A/S

UNCHANGED

Shares2,750,000 from 2,750,000

Change0 (0%)

Value$2.6M (+$47.2K)

Filed 2026-11-06

Bank of New York Mellon Corp

UNCHANGED

Shares300,000 from 300,000

Change0 (0%)

Value$280.6K (+$8.1K)

Filed 2026-11-05

Crestwood Advisors Group, LLC

UNCHANGED

Shares35,000 from 35,000

Change0 (0%)

Value$32.7K (+$955)

Filed 2026-10-27

Barclays PLC

DECREASED

Shares34,000 from 81,000

Change-47,000 (-58%)

Value$31.4K (-$42.1K)

Filed 2026-11-06

Capital Investment Advisory Services, LLC

UNCHANGED

Shares16,000 from 16,000

Change0 (0%)

Value$15.0K (+$437)

Filed 2026-10-30

Wealth Enhancement Advisory Services, LLC

UNCHANGED

Shares10,000 from 10,000

Change0 (0%)

Value$9.3K (+$317)

Filed 2026-10-13

Chicago Capital Management, LLC

INCREASED

Shares5,500 from 5,440

Change+60 (+1%)

Value$5.1M (+$154.5K)

Filed 2026-10-21

Jefferies Financial Group Inc.

CLOSED

Shares0 from 16,000

Change-16,000 (-100%)

Value$0 (-$14.6K)

Filed 2026-11-05

DeepCurrents Investment Group LLC

N/A

Shares— from 45,016,000

Change-45,016,000 (-100%)

Value—

Oaktree Capital Management LP

N/A

Shares— from 40,880,000

Change-40,880,000 (-100%)

Value—

Millennium Management LLC

N/A

Shares— from 34,000,000

Change-34,000,000 (-100%)

Value—

Empyrean Capital Partners, LP

N/A

Shares— from 24,265,000

Change-24,265,000 (-100%)

Value—

Nuveen, LLC

N/A

Shares— from 21,584,000

Change-21,584,000 (-100%)

Value—

Camden Asset Management L P

N/A

Shares— from 15,327,000

Change-15,327,000 (-100%)

Value—

Fort Baker Capital Management LP

N/A

Shares— from 12,500,000

Change-12,500,000 (-100%)

Value—

Capstone Investment Advisors, LLC

N/A

Shares— from 10,080,000

Change-10,080,000 (-100%)

Value—

Wellesley Asset Management

N/A

Shares— from 8,460,000

Change-8,460,000 (-100%)

Value—

KIM, LLC

N/A

Shares— from 7,500,000

Change-7,500,000 (-100%)

Value—

BlackRock, Inc.

N/A

Shares— from 6,825,000

Change-6,825,000 (-100%)

Value—

Advent Capital Management

N/A

Shares— from 3,862,000

Change-3,862,000 (-100%)

Value—

FMR LLC

N/A

Shares— from 3,773,000

Change-3,773,000 (-100%)

Value—

Pinnacle Holdings, LLC

N/A

Shares— from 2,010,000

Change-2,010,000 (-100%)

Value—

Universal- Beteiligungs- und Servicegesellschaft mbH

N/A

Shares— from 1,200,000

Change-1,200,000 (-100%)

Value—

Morgan Stanley

N/A

Shares— from 890,000

Change-890,000 (-100%)

Value—

Cutler Capital Management, LLC

N/A

Shares— from 835,000

Change-835,000 (-100%)

Value—

Zazove Associates LLC

N/A

Shares— from 640,000

Change-640,000 (-100%)

Value—

UBS Asset Management Americas LLC

N/A

Shares— from 334,000

Change-334,000 (-100%)

Value—

Financial Sense Advisors, Inc.

N/A

Shares— from 220,000

Change-220,000 (-100%)

Value—

Raymond James Financial Inc

N/A

Shares— from 23,000

Change-23,000 (-100%)

Value—

Insigneo Advisory Services, LLC

N/A

Shares— from 12,000

Change-12,000 (-100%)

Value—

Wells Fargo & Company

N/A

Shares— from 4,000

Change-4,000 (-100%)

Value—

Steward Partners Investment Advisory, LLC

N/A

Shares— from 4,000

Change-4,000 (-100%)

Value—

Osaic Holdings, Inc.

N/A

Shares— from 6

Change-6 (-100%)

Value—

Erste Asset Management GmbH

N/A

Shares— from 0

Change0

Value—

	Status
Union Bancaire Privee, UBP SA	NEW	345,000,000	—	+345,000,000	—	—	$93	—	2026-11-04
Context Capital Management, LLC	DECREASED	90,318,000	93,631,000	-3,313,000	-4%	$85.2M	$84.6M	-$604.4K	2026-11-04
Russell Investments Group, Ltd.	INCREASED	6,878,000	6,007,000	+871,000	+15%	$5.5M	$6.4M	+$926.7K	2026-11-06
Calamos Advisors LLC	UNCHANGED	5,000,000	5,000,000	0	0%	$4.5M	$4.7M	+$119.2K	2026-11-02
Nykredit A/S	UNCHANGED	2,750,000	2,750,000	0	0%	$2.5M	$2.6M	+$47.2K	2026-11-06
Bank of New York Mellon Corp	UNCHANGED	300,000	300,000	0	0%	$272.4K	$280.6K	+$8.1K	2026-11-05
Crestwood Advisors Group, LLC	UNCHANGED	35,000	35,000	0	0%	$31.8K	$32.7K	+$955	2026-10-27
Barclays PLC	DECREASED	34,000	81,000	-47,000	-58%	$73.6K	$31.4K	-$42.1K	2026-11-06
Capital Investment Advisory Services, LLC	UNCHANGED	16,000	16,000	0	0%	$14.5K	$15.0K	+$437	2026-10-30
Wealth Enhancement Advisory Services, LLC	UNCHANGED	10,000	10,000	0	0%	$9.0K	$9.3K	+$317	2026-10-13
Chicago Capital Management, LLC	INCREASED	5,500	5,440	+60	+1%	$5.0M	$5.1M	+$154.5K	2026-10-21
Jefferies Financial Group Inc.	CLOSED	0	16,000	-16,000	-100%	$14.6K	$0	-$14.6K	2026-11-05
DeepCurrents Investment Group LLC	N/A	—	45,016,000	-45,016,000	-100%	$41.0M	—	—	—
Oaktree Capital Management LP	N/A	—	40,880,000	-40,880,000	-100%	$37.2M	—	—	—
Millennium Management LLC	N/A	—	34,000,000	-34,000,000	-100%	$31.0M	—	—	—
Empyrean Capital Partners, LP	N/A	—	24,265,000	-24,265,000	-100%	$22.0M	—	—	—
Nuveen, LLC	N/A	—	21,584,000	-21,584,000	-100%	$19.6M	—	—	—
Camden Asset Management L P	N/A	—	15,327,000	-15,327,000	-100%	$13.9M	—	—	—
Fort Baker Capital Management LP	N/A	—	12,500,000	-12,500,000	-100%	$11.4M	—	—	—
Capstone Investment Advisors, LLC	N/A	—	10,080,000	-10,080,000	-100%	$9.2M	—	—	—
Wellesley Asset Management	N/A	—	8,460,000	-8,460,000	-100%	$7.7M	—	—	—
KIM, LLC	N/A	—	7,500,000	-7,500,000	-100%	$6.8M	—	—	—
BlackRock, Inc.	N/A	—	6,825,000	-6,825,000	-100%	$6.2M	—	—	—
Advent Capital Management	N/A	—	3,862,000	-3,862,000	-100%	$3.5M	—	—	—
FMR LLC	N/A	—	3,773,000	-3,773,000	-100%	$3.4M	—	—	—
Pinnacle Holdings, LLC	N/A	—	2,010,000	-2,010,000	-100%	$1.8M	—	—	—
Universal- Beteiligungs- und Servicegesellschaft mbH	N/A	—	1,200,000	-1,200,000	-100%	$1.1M	—	—	—
Morgan Stanley	N/A	—	890,000	-890,000	-100%	$807.7K	—	—	—
Cutler Capital Management, LLC	N/A	—	835,000	-835,000	-100%	$758.2K	—	—	—
Zazove Associates LLC	N/A	—	640,000	-640,000	-100%	$581.2K	—	—	—
UBS Asset Management Americas LLC	N/A	—	334,000	-334,000	-100%	$303.1K	—	—	—
Financial Sense Advisors, Inc.	N/A	—	220,000	-220,000	-100%	$200.9K	—	—	—
Raymond James Financial Inc	N/A	—	23,000	-23,000	-100%	$20.9K	—	—	—
Insigneo Advisory Services, LLC	N/A	—	12,000	-12,000	-100%	$10.9K	—	—	—
Wells Fargo & Company	N/A	—	4,000	-4,000	-100%	$3.6K	—	—	—
Steward Partners Investment Advisory, LLC	N/A	—	4,000	-4,000	-100%	$3.6K	—	—	—
Osaic Holdings, Inc.	N/A	—	6	-6	-100%	$5.4K	—	—	—
Erste Asset Management GmbH	N/A	—	0	0	—	$0	—	—	—

Showing 38 of 38 institutions