Amphastar Pharmaceuticals Inc (AMPH)
NASDAQ:AMPH
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Amphastar Pharmaceuticals (AMPH) Ownership Overview
27.14% Insiders
21.18% Mutual Funds
15.75% Other Institutional Investors
24.77% ETFs
11.15% Public Companies and
Individual Investors
The ownership structure of Amphastar Pharmaceuticals (AMPH) stock is a mix of institutional, retail, and individual investors. Approximately 61.70% of the company’s stock is owned by Institutional Investors, 27.14% is owned by Insiders, and 11.15% 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 |
|---|---|---|---|
Mar 31, 2024 | xxxxxxxxxxxxx | $846915 | |
Mar 31, 2024 | xxxxxxxxxxxxx | $1234170 | |
Mar 31, 2024 | xxxxxxxxxxxxx | $7956968 |
Top Shareholders
Holder | # of Shares | Type | % Holding | Value |
|---|---|---|---|---|
| 11,062,856 | Insider | 25.09% | 197,140,094 | |
| 4,019,346 | Institution | 9.12% | 71,624,746 | |
| 2,537,019 | Institution | 5.75% | 45,209,679 | |
| 2,043,304 | Institution | 4.63% | 36,411,677 | |
| 1,490,832 | Institution | 3.38% | 26,566,626 | |
| 990,268 | Institution | 2.25% | 17,646,576 | |
| 926,376 | Institution | 2.10% | 16,508,020 | |
| 877,979 | Institution | 1.99% | 15,645,586 | |
| 721,803 | Institution | 1.64% | 12,862,529 | |
| 496,073 | Institution | 1.13% | 8,840,021 |
Top Mutual Fund Holders
Holder | # of Shares | Type | % Holding | Value |
|---|---|---|---|---|
| 2,537,019 | Institution | 5.75% | 45,209,679 | |
| 1,490,832 | Institution | 3.38% | 26,566,626 | |
| 926,376 | Institution | 2.10% | 16,508,020 | |
| 418,861 | Institution | 0.95% | 7,464,103 | |
| 398,365 | Institution | 0.90% | 7,098,864 | |
| 364,289 | Institution | 0.83% | 6,491,630 | |
| 344,400 | Institution | 0.78% | 6,137,208 | |
| 269,433 | Institution | 0.61% | 4,801,296 | |
| 241,954 | Institution | 0.55% | 4,311,620 | |
| 226,024 | Institution | 0.51% | 4,027,748 |
Top ETF Holders
Holder | # of Shares | Type | % Holding | Value |
|---|---|---|---|---|
| 2,164,308 | Institution | 4.91% | 37,875,390 | |
| 1,109,376 | Institution | 2.52% | 21,732,676 | |
| 899,618 | Institution | 2.04% | 15,743,315 | |
| 846,044 | Institution | 1.92% | 14,805,770 | |
| 396,213 | Institution | 0.90% | 7,761,813 | |
| 346,647 | Institution | 0.79% | 6,066,323 | |
| 327,331 | Institution | 0.74% | 5,630,093 | |
| 284,185 | Institution | 0.64% | 4,973,238 | |
| 252,686 | Institution | 0.57% | 4,662,057 | |
| 252,368 | Institution | 0.57% | 4,656,190 |
FAQ
Who Owns Amphastar Pharmaceuticals Inc (AMPH)?
According to the latest TipRanks data, approximately 15.75% of the company's stock is held by institutional investors, 27.14% is held by insiders, and 11.15% is held by retail investors.
What percentage of Amphastar Pharmaceuticals Inc (AMPH) stock is held by institutional investors?
According to the latest TipRanks data, approximately 15.75% of Amphastar Pharmaceuticals Inc (AMPH) stock is held by institutional investors.
What percentage of Amphastar Pharmaceuticals Inc (AMPH) stock is held by retail investors?
According to the latest TipRanks data, approximately 11.15% of Amphastar Pharmaceuticals Inc (AMPH) stock is held by retail investors.
Who owns the most shares of Amphastar Pharmaceuticals Inc (AMPH)?
Jack Zhang owns the most shares of Amphastar Pharmaceuticals Inc (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.