Security key
03209R103
Amphastar Pharmaceuticals, Inc. - Common Stock (AMPH)
CUSIP: 03209R103
Q1 2025 13F Holders as of 31 Mar 2025
- Type / Class
- Equity / Common Stock
- Shares outstanding
- 46,377,939
- Total 13F shares
- 33,249,489
- Share change
- -1,472,596
- Total reported value
- $963,158,808
- Put/Call ratio
- 56%
- Price per share
- $28.99
- Number of holders
- 240
- Value change
- -$63,190,016
- Number of buys
- 111
- Number of sells
- 142
Report period
Q1 2025
Institutions
240
Top holders
10
AMPH full security history
Newer quarter: Q2 2025
Previous quarter: Q4 2024
Amphastar Pharmaceuticals, Inc. SEC filings
Amphastar Pharmaceuticals, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 03209R103
Recent filing periods:
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 first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings 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 |
|---|---|---|---|---|---|---|---|---|
| Jack Y. Zhang |
13D/G
|
— |
25%
|
12,524,153
|
$301,456,363 | $0 | 31 Dec 2024 | |
| BlackRock, Inc. |
13F
|
Company |
13%
|
6,117,822
|
$227,154,732 | — | 31 Dec 2024 | |
| VANGUARD GROUP INC |
13F
|
Company |
5.9%
|
2,714,628
|
$100,794,137 | — | 31 Dec 2024 | |
| TD ASSET MANAGEMENT INC |
13F
|
Company |
4%
|
1,840,286
|
$68,329,819 | — | 31 Dec 2024 | |
| STATE STREET CORP |
13F
|
Company |
3.4%
|
1,596,110
|
$59,263,564 | — | 31 Dec 2024 | |
| Neuberger Berman Group LLC |
13F
|
Company |
3%
|
1,374,125
|
$51,021,262 | — | 31 Dec 2024 | |
| Pacer Advisors, Inc. |
13F
|
Company |
2.9%
|
1,350,368
|
$50,139,164 | — | 31 Dec 2024 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
2.6%
|
1,198,590
|
$44,503,008 | — | 31 Dec 2024 | |
| FULLER & THALER ASSET MANAGEMENT, INC. |
13F
|
Company |
2.4%
|
1,132,926
|
$42,065,561 | — | 31 Dec 2024 | |
| Epoch Investment Partners, Inc. |
13F
|
Company |
2.4%
|
1,101,273
|
$40,890,266 | — | 31 Dec 2024 | |
| Boston Trust Walden Corp |
13F
|
Company |
2.1%
|
978,920
|
$36,347,299 | — | 31 Dec 2024 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2%
|
916,081
|
$34,022,127 | — | 31 Dec 2024 | |
| FEDERATED HERMES, INC. |
13F
|
Company |
1.8%
|
823,487
|
$30,576,072 | — | 31 Dec 2024 | |
| MORGAN STANLEY |
13F
|
Company |
1.4%
|
632,074
|
$23,468,938 | — | 31 Dec 2024 | |
| NORTHERN TRUST CORP |
13F
|
Company |
1.3%
|
613,170
|
$22,767,002 | — | 31 Dec 2024 | |
| MARSHALL WACE, LLP |
13F
|
Company |
1.3%
|
608,706
|
$22,601,255 | — | 31 Dec 2024 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
1.2%
|
566,656
|
$21,041,000 | — | 31 Dec 2024 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
1.1%
|
525,500
|
$19,511,815 | — | 31 Dec 2024 | |
| BESSEMER GROUP INC |
13F
|
Company |
1.1%
|
488,630
|
$18,144,000 | — | 31 Dec 2024 | |
| AMERICAN CENTURY COMPANIES INC |
13F
|
Company |
1%
|
472,017
|
$17,525,991 | — | 31 Dec 2024 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.92%
|
427,835
|
$15,885,514 | — | 31 Dec 2024 | |
| Boston Partners |
13F
|
Company |
0.92%
|
426,636
|
$15,778,141 | — | 31 Dec 2024 | |
| Granite Investment Partners, LLC |
13F
|
Company |
0.86%
|
396,702
|
$14,729,545 | — | 31 Dec 2024 | |
| Mesirow Institutional Investment Management, Inc. |
13F
|
Company |
0.82%
|
380,389
|
$14,123,844 | — | 31 Dec 2024 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.75%
|
347,512
|
$12,903,121 | — | 31 Dec 2024 | |
| Invesco Ltd. |
13F
|
Company |
0.64%
|
298,864
|
$11,096,821 | — | 31 Dec 2024 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.62%
|
285,863
|
$10,614,092 | — | 31 Dec 2024 | |
| NORDEA INVESTMENT MANAGEMENT AB |
13F
|
Company |
0.6%
|
279,714
|
$10,385,780 | — | 31 Dec 2024 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.55%
|
256,556
|
$9,525,924 | — | 31 Dec 2024 | |
| SYSTEMATIC FINANCIAL MANAGEMENT LP |
13F
|
Company |
0.53%
|
246,348
|
$9,146,925 | — | 31 Dec 2024 | |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.51%
|
237,520
|
$8,819,118 | — | 31 Dec 2024 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.45%
|
207,978
|
$7,722,223 | — | 31 Dec 2024 | |
| JANUS HENDERSON GROUP PLC |
13F
|
Company |
0.41%
|
189,347
|
$7,030,285 | — | 31 Dec 2024 | |
| OBERWEIS ASSET MANAGEMENT INC/ |
13F
|
Company |
0.4%
|
184,595
|
$6,854,012 | — | 31 Dec 2024 | |
| SILVERCREST ASSET MANAGEMENT GROUP LLC |
13F
|
Company |
0.36%
|
166,814
|
$6,193,804 | — | 31 Dec 2024 | |
| Assenagon Asset Management S.A. |
13F
|
Company |
0.35%
|
161,399
|
$5,992,745 | — | 31 Dec 2024 | |
| UBS Group AG |
13F
|
Company |
0.33%
|
153,742
|
$5,708,441 | — | 31 Dec 2024 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.33%
|
153,571
|
$5,702,090 | — | 31 Dec 2024 | |
| Clark Capital Management Group, Inc. |
13F
|
Company |
0.32%
|
148,075
|
$5,498,025 | — | 31 Dec 2024 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.31%
|
146,015
|
$5,421,537 | — | 31 Dec 2024 | |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
0.31%
|
143,436
|
$5,325,779 | — | 31 Dec 2024 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.3%
|
140,413
|
$5,213,534 | — | 31 Dec 2024 | |
| Portolan Capital Management, LLC |
13F
|
Company |
0.28%
|
131,123
|
$4,868,597 | — | 31 Dec 2024 | |
| LAM GROUP, INC. |
13F
|
Company |
0.28%
|
130,800
|
$4,856,604 | — | 31 Dec 2024 | |
| FRONTIER CAPITAL MANAGEMENT CO LLC |
13F
|
Company |
0.27%
|
123,360
|
$4,580,345 | — | 31 Dec 2024 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
0.26%
|
118,851
|
$4,412,938 | — | 31 Dec 2024 | |
| Qube Research & Technologies Ltd |
13F
|
Company |
0.25%
|
115,292
|
$4,280,792 | — | 31 Dec 2024 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.24%
|
112,094
|
$4,162,050 | — | 31 Dec 2024 | |
| Trexquant Investment LP |
13F
|
Company |
0.23%
|
105,528
|
$3,918,255 | — | 31 Dec 2024 | |
| Legal & General Group Plc |
13F
|
Company |
0.22%
|
103,741
|
$3,851,904 | — | 31 Dec 2024 |
Institutional Holders of Amphastar Pharmaceuticals, Inc. - Common Stock (AMPH) as of Q1 2025
As of 31 Mar 2025,
Amphastar Pharmaceuticals, Inc. - Common Stock (AMPH) was held by
240 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
33,249,489 shares.
The largest 10 holders included
BlackRock, Inc., VANGUARD GROUP INC, TD Asset Management Inc, STATE STREET CORP, DIMENSIONAL FUND ADVISORS LP, FULLER & THALER ASSET MANAGEMENT, INC., Epoch Investment Partners, Inc., Boston Trust Walden Corp, MARSHALL WACE, LLP, and GEODE CAPITAL MANAGEMENT, LLC.
This page lists
240
institutional shareholders reporting positions in this security
for the Q1 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q1 2025 vs Q4 2024 Across Filers
Q4 2024 holders
261
Q1 2025 holders
240
Holder diff
-21
| Investor | Q4 2024 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q4 2024 Value $ | Q1 2025 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.
An asterisk sign (*) next to the price indicates that the price is likely invalid.