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Amphastar Pharmaceuticals (AMPH)
NASDAQ:AMPH
Amphastar Pharmaceuticals (AMPH) Ownership Overview
25.35% Insiders
20.19% Mutual Funds
16.51% Other Institutional Investors
20.36% ETFs
17.59% Public Companies and
Individual Investors
The ownership structure of Amphastar Pharmaceuticals (AMPH) stock is a mix of institutional, retail, and individual investors. Approximately 57.05% of the company’s stock is owned by Institutional Investors, 25.35% is owned by Insiders, and 17.59% is owned by Public Companies and Individual Investors.
Recent Insider Trading Activity
Date | Name | Activity | Value |
|---|---|---|---|
Dec 18, 2025 | xxxxxxxxxxxxx | $256322 | |
Dec 15, 2025 | xxxxxxxxxxxxx | $107488 | |
Nov 25, 2025 | xxxxxxxxxxxxx | $113251 | |
Nov 17, 2025 | xxxxxxxxxxxxx | $441827 |
Recent Hedge Fund Trading Activity
Date | Firm | Activity | Value |
|---|---|---|---|
Sep 30, 2025 | xxxxxxxxxxxxx | $349115 | |
Sep 30, 2025 | xxxxxxxxxxxxx | $8692776 | |
Sep 30, 2025 | xxxxxxxxxxxxx | $9762481 |
Top Shareholders
Holder | # of Shares | Type | % Holding | Value |
|---|---|---|---|---|
| 10,860,813 | Insider | 23.64% | 288,897,626 | |
| 4,141,129 | Institution | 9.01% | 110,154,031 | |
| 2,490,346 | Institution | 5.42% | 66,243,204 | |
| 2,019,285 | Institution | 4.39% | 53,712,981 | |
| 1,526,745 | Institution | 3.32% | 40,611,417 | |
| 887,438 | Institution | 1.93% | 23,605,851 | |
| 707,544 | Institution | 1.54% | 18,820,670 | |
| 597,319 | Institution | 1.30% | 15,888,685 | |
| 521,065 | Institution | 1.13% | 13,860,329 | |
| 480,861 | Institution | 1.05% | 12,790,903 |
Top Mutual Fund Holders
Holder | # of Shares | Type | % Holding | Value |
|---|---|---|---|---|
| 2,490,346 | Institution | 5.42% | 66,243,204 | |
| 1,526,745 | Institution | 3.32% | 40,611,417 | |
| 887,438 | Institution | 1.93% | 23,605,851 | |
| 480,861 | Institution | 1.05% | 12,790,903 | |
| 423,742 | Institution | 0.92% | 11,271,537 | |
| 377,403 | Institution | 0.82% | 10,038,920 | |
| 344,400 | Institution | 0.75% | 9,161,040 | |
| 269,433 | Institution | 0.59% | 7,166,918 | |
| 246,995 | Institution | 0.54% | 6,570,067 | |
| 220,396 | Institution | 0.48% | 5,862,534 |
Top ETF Holders
Holder | # of Shares | Type | % Holding | Value |
|---|---|---|---|---|
| 2,184,122 | Institution | 4.75% | 58,097,645 | |
| 1,109,376 | Institution | 2.41% | 30,729,715 | |
| 963,021 | Institution | 2.10% | 25,616,359 | |
| 434,377 | Institution | 0.95% | 11,510,991 | |
| 383,201 | Institution | 0.83% | 10,614,668 | |
| 331,569 | Institution | 0.72% | 8,819,735 | |
| 320,259 | Institution | 0.70% | 8,486,864 | |
| 307,419 | Institution | 0.67% | 8,177,345 | |
| 202,776 | Institution | 0.44% | 5,373,564 | |
| 190,557 | Institution | 0.41% | 5,068,816 |
FAQ
Who Owns Amphastar Pharmaceuticals (AMPH)?
According to the latest TipRanks data, approximately 16.51% of the company's stock is held by institutional investors, 25.35% is held by insiders, and 17.59% is held by retail investors.
What percentage of Amphastar Pharmaceuticals (AMPH) stock is held by institutional investors?
According to the latest TipRanks data, approximately 16.51% of Amphastar Pharmaceuticals (AMPH) stock is held by institutional investors.
What percentage of Amphastar Pharmaceuticals (AMPH) stock is held by retail investors?
According to the latest TipRanks data, approximately 17.59% of Amphastar Pharmaceuticals (AMPH) stock is held by retail investors.
Who owns the most shares of Amphastar Pharmaceuticals (AMPH)?
Jack Zhang owns the most shares of Amphastar Pharmaceuticals (AMPH).
What is the significance of the ownership structure for a publicly traded company?
The ownership structure can impact the company's decision making, as large institutional investors may exert influence on the company's management and can also affect the company's stock price with their buying and selling patterns.