What does CUSIP 03209R103 represent in this 13F holders report?

CUSIP 03209R103 is the security identifier for AMPH - Amphastar Pharmaceuticals, Inc. - Common Stock used to aggregate holder disclosures.

How many institutions held AMPH - Amphastar Pharmaceuticals, Inc. - Common Stock in Q4 2018?

129 institutional investors reported AMPH - Amphastar Pharmaceuticals, Inc. - Common Stock for Q4 2018. Use the holders table for investor-level position and value details.

Amphastar Pharmaceuticals, Inc. - Common Stock (AMPH)

CUSIP: 03209R103

Q4 2018 13F Holders as of 31 Dec 2018

Type / Class: Equity / Common Stock
Shares outstanding: 46,377,939
Total 13F shares: 22,224,435
Share change: +1,576,663
Total reported value: $442,228,625
Price per share: $19.90
Number of holders: 129
Value change: +$31,389,222
Number of buys: 71
Number of sells: 39

Quarterly Holders Quick Answers

What is CUSIP 03209R103?
CUSIP 03209R103 identifies AMPH - Amphastar Pharmaceuticals, Inc. - Common Stock in SEC institutional holdings data.

Need full ownership history?
Open the full security ownership history page.

Next holder-history checks

These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.

Back to full security ownership history for the broader multi-quarter picture.
Latest 13F filings for newly reported positions across managers.
Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
SEC investors directory for manager drilldown.

Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q1 2019
Previous quarter: Q3 2018

Recent filing periods for CUSIP 03209R103:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of AMPH - Amphastar Pharmaceuticals, Inc. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
BlackRock Finance, Inc.	13F	Company	13%	5,987,805	$115,205,000	—	30 Sep 2018	13F
VANGUARD GROUP INC	13F	Company	4.8%	2,243,393	$43,162,000	—	30 Sep 2018	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	4.1%	1,909,883	$36,746,000	—	30 Sep 2018	13F
FEDERATED HERMES, INC.	13F	Company	2.8%	1,276,508	$24,560,000	—	30 Sep 2018	13F
STATE STREET CORP	13F	Company	2.3%	1,049,056	$20,189,000	—	30 Sep 2018	13F
TEACHERS ADVISORS, LLC	13F	Company	1.2%	566,984	$10,909,000	—	30 Sep 2018	13F
Invesco Ltd.	13F	Company	1.1%	505,438	$9,725,000	—	30 Sep 2018	13F
NORTHERN TRUST CORP	13F	Company	1%	480,430	$9,243,000	—	30 Sep 2018	13F
Bank of New York Mellon Corp	13F	Company	0.9%	418,903	$8,060,000	—	30 Sep 2018	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.84%	388,517	$7,475,000	—	30 Sep 2018	13F
Cortina Asset Management, LLC	13F	Company	0.76%	352,170	$6,776,000	—	30 Sep 2018	13F
ROTHSCHILD & CO ASSET MANAGEMENT US INC.	13F	Company	0.69%	322,173	$6,199,000	—	30 Sep 2018	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	0.66%	306,772	$5,902,293	—	30 Sep 2018	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	0.6%	280,115	$5,389,000	—	30 Sep 2018	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.52%	241,037	$4,638,000	—	30 Sep 2018	13F
NORDEA INVESTMENT MANAGEMENT AB	13F	Company	0.52%	239,159	$4,601,000	—	30 Sep 2018	13F
ARGENT CAPITAL MANAGEMENT LLC	13F	Company	0.51%	235,775	$4,536,000	—	30 Sep 2018	13F
MORGAN STANLEY	13F	Company	0.5%	233,864	$4,499,000	—	30 Sep 2018	13F
MACKAY SHIELDS LLC	13F	Company	0.44%	205,100	$3,946,000	—	30 Sep 2018	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.42%	194,932	$3,751,000	—	30 Sep 2018	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.42%	194,630	$3,744,000	—	30 Sep 2018	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.4%	187,419	$3,606,000	—	30 Sep 2018	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.4%	186,100	$3,581,000	—	30 Sep 2018	13F
Skandinaviska Enskilda Banken AB (publ)	13F	Company	0.33%	152,300	$2,930,000	—	30 Sep 2018	13F
DEUTSCHE BANK AG\	13F	Company	0.28%	127,586	$2,455,000	—	30 Sep 2018	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	0.27%	124,100	$2,388,000	—	30 Sep 2018	13F
JPMORGAN CHASE & CO	13F	Company	0.27%	123,581	$2,377,000	—	30 Sep 2018	13F
PARAMETRIC PORTFOLIO ASSOCIATES LLC	13F	Company	0.25%	115,806	$2,228,000	—	30 Sep 2018	13F
Allianz Asset Management GmbH	13F	Company	0.24%	110,465	$2,125,000	—	30 Sep 2018	13F
MARTINGALE ASSET MANAGEMENT L P	13F	Company	0.23%	105,629	$2,033,000	—	30 Sep 2018	13F
RHUMBLINE ADVISERS	13F	Company	0.19%	87,863	$1,690,000	—	30 Sep 2018	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.18%	84,506	$1,626,000	—	30 Sep 2018	13F
QS Investors, LLC	13F	Company	0.16%	74,279	$1,429,000	—	30 Sep 2018	13F
Legal & General Group Plc	13F	Company	0.16%	74,224	$1,425,000	—	30 Sep 2018	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.16%	73,819	$1,420,000	—	30 Sep 2018	13F
KBC Group NV	13F	Company	0.15%	71,653	$1,379,000	—	30 Sep 2018	13F
SEI INVESTMENTS CO	13F	Company	0.15%	67,934	$1,307,000	—	30 Sep 2018	13F
Swiss National Bank	13F	Company	0.13%	61,700	$1,187,000	—	30 Sep 2018	13F
PRUDENTIAL FINANCIAL INC	13F	Company	0.12%	56,910	$1,095,000	—	30 Sep 2018	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.12%	54,411	$1,047,000	—	30 Sep 2018	13F
Arizona State Retirement System	13F	Company	0.11%	50,325	$968,000	—	30 Sep 2018	13F
BOSTON ADVISORS LLC	13F	Company	0.1%	44,216	$851,000	—	30 Sep 2018	13F
Matarin Capital Management, LLC	13F	Company	0.09%	43,941	$845,425	—	30 Sep 2018	13F
CANADA LIFE ASSURANCE Co	13F	Company	0.09%	43,863	$844,000	—	30 Sep 2018	13F
VOYA INVESTMENT MANAGEMENT LLC	13F	Company	0.09%	39,942	$768,000	—	30 Sep 2018	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.09%	39,612	$762,000	—	30 Sep 2018	13F
BARCLAYS PLC	13F	Company	0.08%	38,112	$733,000	—	30 Sep 2018	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.08%	37,900	$729,000	—	30 Sep 2018	13F
CITIGROUP INC	13F	Company	0.08%	37,127	$715,000	—	30 Sep 2018	13F
STATE OF WISCONSIN INVESTMENT BOARD	13F	Company	0.08%	36,200	$696,000	—	30 Sep 2018	13F

Institutional Holders of Amphastar Pharmaceuticals, Inc. - Common Stock (AMPH) as of Q4 2018

As of 31 Dec 2018, Amphastar Pharmaceuticals, Inc. - Common Stock (AMPH) was held by 129 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 22,224,435 shares. The largest 10 holders included BlackRock Inc., Vanguard Group Inc, DIMENSIONAL FUND ADVISORS LP, FEDERATED INVESTORS INC /PA/, Invesco Ltd., STATE STREET CORP, TEACHERS ADVISORS, LLC, NORTHERN TRUST CORP, Bank of New York Mellon Corp, and GEODE CAPITAL MANAGEMENT, LLC. This page lists 129 institutional shareholders reporting positions in this security for the Q4 2018 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q4 2018 vs Q3 2018 Across Filers

Q3 2018 holders

104

Q4 2018 holders

129

Holder diff

Investor	Q3 2018 Shares	Q4 2018 Shares	Share Diff	Share Chg %	Q3 2018 Value $	Q4 2018 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.