Security key
03209R103
Amphastar Pharmaceuticals, Inc. - Common Stock (AMPH)
CUSIP: 03209R103
Q2 2023 13F Holders as of 30 Jun 2023
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 31,353,069
- Total 13F value
- $1,801,848,806
- Share change
- +1,142,574
- Put/Call ratio
- 69%
- SEC-reported price per share
- $57.47
- Number of holders
- 241
- Value change
- +$73,791,648
- Number of buys
- 126
- Number of sells
- 110
- Shares outstanding
- 44,328,981
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2023
Institutions
241
Top holders
10
AMPH full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Amphastar Pharmaceuticals, Inc. SEC filings
Amphastar Pharmaceuticals, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 03209R103
Recent filing periods:
Ownership snapshot
Top reported holders of AMPH - Amphastar Pharmaceuticals, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock Finance, Inc.
Disclosed value leader
BlackRock Finance, Inc.
Comparable rows
15/15
Latest evidence
31 Mar 2023
13F
Lead comparable stake: 15%
Showing 1-6 of 15 holder rows.
Quick read
BlackRock Finance, Inc. leads the comparable SEC ownership view at 15%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock Finance, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock Finance, Inc.
15%
FEDERATED HERMES, INC.
7.6%
VANGUARD GROUP INC
6%
DIMENSIONAL FUND ADVISORS LP
4.3%
STATE STREET CORP
3.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock Finance, Inc. |
13F
Company
|
15%
|
$246,265,353
6,567,076 shares
|
— | 31 Mar 2023 |
| FEDERATED HERMES, INC. |
13F
Company
|
7.6%
|
$126,997,988
3,386,613 shares
|
— | 31 Mar 2023 |
| VANGUARD GROUP INC |
13F
Company
|
6%
|
$99,435,189
2,651,605 shares
|
— | 31 Mar 2023 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
4.3%
|
$71,909,496
1,917,571 shares
|
— | 31 Mar 2023 |
| STATE STREET CORP |
13F
Company
|
3.1%
|
$50,981,063
1,359,495 shares
|
— | 31 Mar 2023 |
| FULLER & THALER ASSET MANAGEMENT, INC. |
13F
Company
|
1.8%
|
$30,438,525
811,694 shares
|
— | 31 Mar 2023 |
How to read this table
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.
13F holder rows
Institutional holders as of Q2 2023
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
241
Shares
31,353,069
Rows available
241
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2023 vs Q1 2023 Across Filers
Q1 2023 holders
216
Q2 2023 holders
241
Holder diff
25
| Investor | Q1 2023 Shares | Q2 2023 Shares | Share Diff | Share Chg % | Q1 2023 value | Q2 2023 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend