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Amphastar Pharmaceuticals (AMPH) Ownership Overview
28.21% Insiders
21.72% Mutual Funds
9.70% Other Institutional Investors
25.46% ETFs
14.91% Public Companies and
Individual Investors
The ownership structure of Amphastar Pharmaceuticals (AMPH) stock is a mix of institutional, retail, and individual investors. Approximately 56.88% of the company’s stock is owned by Institutional Investors, 28.21% is owned by Insiders, and 14.91% is owned by Public Companies and Individual Investors.
Recent Insider Trading Activity
Date | Name | Activity | Value |
|---|---|---|---|
Aug 12, 2026 | xxxxxxxxxxxxx | $161852 | |
Dec 18, 2025 | xxxxxxxxxxxxx | $256322 | |
Dec 15, 2025 | xxxxxxxxxxxxx | $107488 | |
Nov 25, 2025 | xxxxxxxxxxxxx | $113251 |
Recent Hedge Fund Trading Activity
Date | Firm | Activity | Value |
|---|---|---|---|
Jun 30, 2026 | xxxxxxxxxxxxx | $5948216 |
Top Shareholders
Holder | # of Shares | Type | % Holding | Value |
|---|---|---|---|---|
| 11,062,856 | Insider | 26.01% | 243,161,575 | |
| 3,875,456 | Institution | 9.11% | 85,182,523 | |
| 2,537,019 | Institution | 5.96% | 55,763,678 | |
| 1,999,034 | Institution | 4.70% | 43,938,767 | |
| 1,505,361 | Institution | 3.54% | 33,087,835 | |
| 1,232,450 | Institution | 2.90% | 27,089,251 | |
| 1,127,877 | Institution | 2.65% | 24,790,736 | |
| 1,008,411 | Institution | 2.37% | 22,164,874 | |
| 938,013 | Institution | 2.21% | 20,617,526 | |
| 404,317 | Institution | 0.95% | 8,886,888 |
Top Mutual Fund Holders
Holder | # of Shares | Type | % Holding | Value |
|---|---|---|---|---|
| 2,537,019 | Institution | 5.96% | 55,763,678 | |
| 1,505,361 | Institution | 3.54% | 33,087,835 | |
| 1,127,877 | Institution | 2.65% | 24,790,736 | |
| 404,317 | Institution | 0.95% | 8,886,888 | |
| 382,841 | Institution | 0.90% | 8,414,845 | |
| 366,019 | Institution | 0.86% | 8,045,098 | |
| 344,400 | Institution | 0.81% | 7,569,912 | |
| 274,530 | Institution | 0.65% | 6,034,169 | |
| 269,433 | Institution | 0.63% | 5,922,137 | |
| 236,986 | Institution | 0.56% | 5,208,952 |
Top ETF Holders
Holder | # of Shares | Type | % Holding | Value |
|---|---|---|---|---|
| 2,063,980 | Institution | 4.85% | 45,366,280 | |
| 1,125,797 | Institution | 2.65% | 24,227,151 | |
| 1,055,676 | Institution | 2.48% | 21,050,179 | |
| 829,214 | Institution | 1.95% | 18,226,124 | |
| 391,718 | Institution | 0.92% | 7,810,857 | |
| 332,533 | Institution | 0.78% | 7,156,110 | |
| 325,600 | Institution | 0.77% | 7,006,912 | |
| 301,650 | Institution | 0.71% | 6,630,267 | |
| 299,359 | Institution | 0.70% | 6,442,206 | |
| 260,238 | Institution | 0.61% | 5,600,322 |
FAQ
Who Owns Amphastar Pharmaceuticals (AMPH)?
According to the latest TipRanks data, approximately 9.70% of the company's stock is held by institutional investors, 28.21% is held by insiders, and 14.91% is held by retail investors.
What percentage of Amphastar Pharmaceuticals (AMPH) stock is held by institutional investors?
According to the latest TipRanks data, approximately 9.70% 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 14.91% 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.