Amphastar Pharmaceuticals Ownership | Who Owns Amphastar Pharmaceuticals?
Amphastar Pharmaceuticals Ownership Summary
Amphastar Pharmaceuticals is owned by 2.23% institutional investors, 23.19% insiders, and 74.58% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 12.58% of AMPH shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 4.77% of its assets in Amphastar Pharmaceuticals shares.
AMPH Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Amphastar Pharmaceuticals | 2.23% | 23.19% | 74.58% |
| Sector | Healthcare Stocks | 76.79% | 9.87% | 13.34% |
| Industry | Specialty & Generic Drug Manufacturers Stocks | 21.75% | 11.29% | 66.96% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 6.12M | 12.58% | $227.15M |
| Blackrock | 5.94M | 12.33% | $237.70M |
| Vanguard group | 2.71M | 5.58% | $100.79M |
| Td asset management | 1.84M | 3.79% | $68.33M |
| State street | 1.60M | 3.28% | $59.26M |
| Pacer advisors | 1.35M | 2.78% | $50.14M |
| Dimensional fund advisors lp | 1.20M | 2.47% | $44.50M |
| Fuller & thaler asset management | 1.13M | 2.33% | $42.07M |
| Epoch investment partners | 1.10M | 2.27% | $40.89M |
| Boston trust walden | 978.92K | 2.01% | $36.35M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Lam group | 130.80K | 3.46% | $4.86M |
| Aurora investment counsel | 54.70K | 1.11% | $2.03M |
| Mesirow institutional investment management | 380.39K | 1.09% | $14.12M |
| Bridge city capital | 70.09K | 0.69% | $2.60M |
| Granite investment partners | 396.70K | 0.64% | $14.73M |
| Shaker investments llc/oh | 18.52K | 0.29% | $687.65K |
| Boston trust walden | 978.92K | 0.26% | $36.35M |
| Systematic financial management lp | 246.35K | 0.23% | $9.15M |
| Entrypoint capital | 13.66K | 0.21% | $507.12K |
| Epoch investment partners | 1.10M | 0.20% | $40.89M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Pacer advisors | 1.35M | 0.11% | 1.35M |
| Millennium management | 868.55K | 0.01% | 612.00K |
| Boston trust walden | 978.92K | 0.26% | 439.28K |
| Boston partners | 426.64K | 0.02% | 426.64K |
| Systematic financial management lp | 246.35K | 0.23% | 246.35K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Neuberger berman group | - | - | -1.37M |
| Federated hermes | 823.49K | 0.07% | -1.12M |
| Boone capital management | - | - | -316.56K |
| Td asset management | 1.84M | 0.06% | -294.75K |
| Wealthfront advisers | - | - | -249.60K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Boston partners | 426.64K | 0.02% | 426.64K | $15.78M |
| Systematic financial management lp | 246.35K | 0.23% | 246.35K | $9.15M |
| Raymond james financial | 92.90K | 0.00% | 92.90K | $3.45M |
| Polaris capital management | 24.50K | 0.04% | 24.50K | $909.68K |
| Significant wealth partners | 7.13K | 0.14% | 7.13K | $264.92K |
Sold Out
| Holder | Change |
|---|---|
| Sjs investment consulting | -1.00 |
| Financial gravity asset management | -1.00 |
| Jfs wealth advisors | -3.00 |
| Nelson, van denburg & campbell wealth management group | -7.00 |
| Capital performance advisors llp | -11.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2025 | 5 | -98.12% | 1,063,934 | -97.00% | 2 | 0.04% | 3 | -97.50% | 2 | -98.02% |
| Dec 31, 2024 | 261 | -7.45% | 35,408,762 | 0.08% | 72 | 1.38% | 116 | -18.31% | 100 | 7.53% |
| Sep 30, 2024 | 280 | 2.94% | 35,359,697 | 2.73% | 72 | 1.47% | 140 | - | 93 | -4.12% |
| Jun 30, 2024 | 268 | -1.83% | 34,405,302 | 2.58% | 71 | 1.47% | 138 | 2.99% | 96 | -1.03% |
| Mar 31, 2024 | 273 | -2.85% | 33,540,017 | 0.70% | 69 | 1.46% | 134 | -8.84% | 97 | 6.59% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 2.27M | 4.77% | -2.40K |
| Vanguard US Total Market Shares ETF | 1.14M | 2.40% | 1.24K |
| FullerThaler Behavioral Small-Cap Equity | 1.08M | 2.27% | -113.40K |
| FullerThaler Behavioral Sm-Cp Eq R6 | 1.08M | 2.27% | -113.40K |
| iShares Russell 2000 ETF | 940.68K | 1.98% | 159.00 |
| TD U.S. Capital Reinvestment I | 920.14K | 1.93% | -27.55K |
| Vanguard Total Stock Mkt Idx Inv | 889.26K | 1.87% | -247.72K |
| Neuberger Berman Genesis Inv | 794.66K | 1.65% | -271.05K |
| Federated Hermes Kaufmann R | 615.00K | 1.26% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 594.17K | 1.25% | 14.32K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 01, 2025 | Petersen Floyd F. | - | Sell | $12.04K |
| Apr 01, 2025 | Petersen Floyd F. | - | Sell | $14.19K |
| Mar 06, 2025 | Petersen Floyd F. | - | Sell | $27.99K |
| Mar 04, 2025 | PETERS WILLIAM J | CFO, EVP & TREASURER | Sell | $116.52K |
| Dec 13, 2024 | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Sell | $361.84K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q2 | - | 2 |
| 2025 Q1 | - | 2 |
| 2024 Q4 | - | 7 |
| 2024 Q3 | - | 5 |
| 2024 Q2 | - | 6 |
AMPH Ownership FAQ
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