| Investor | Value | Of portfolio | Shares | Change | Quarter |
|---|---|---|---|---|---|
| Oaktree Capital · Howard Marks | $37.2M | 0.52% | 40.88M | +7.5% | Q2 2026 |
| Renaissance Technologies | $10.6M | 0.01% | 525.10K | −5.2% | Q2 2026 |
From each investor's quarterly 13F filing with the SEC: positions at the quarter's end, reported up to 45 days later. All investors
No member of Congress has disclosed a AMPH trade since 2025.
From House and Senate STOCK Act reports. Members disclose trades, not holdings, as value ranges up to 45 days later, so amounts are estimates and “last move” is a hint at who still holds it, not a position. All recent congress trades
| Date | Insider | Transaction | Shares | Value |
|---|---|---|---|---|
| Sep 20, 2026 | Peters William JChief Financial Officer | Sale at price 25.00 per share. | 4.1K | $103.47K |
| Sep 15, 2026 | Zhou RongOfficer | Sale at price 23.94 per share. | 10K | $239.40K |
| Sep 15, 2026 | Zhou RongOfficer | Conversion of Exercise of derivative security at price 13.35 per share. | 10K | $133.50K |
| Sep 1, 2026 | Zhou RongOfficer | Sale at price 23.63 per share. | 3.2K | $75.31K |
| Aug 10, 2026 | Prins Richard KDirector | Sale at price 20.30 per share. | 8K | $161.85K |
| Aug 6, 2026 | Peters William JChief Financial Officer | Sale at price 22.48 per share. | 8.2K | $183.89K |
| Aug 6, 2026 | Peters William JChief Financial Officer | Conversion of Exercise of derivative security at price 19.79 per share. | 5.1K | $100.00K |
| Jul 8, 2026 | Pierce Anthony TDirector | Stock Award(Grant) at price 0.00 per share. | 7.9K | — |
| May 31, 2026 | Zasloff Michael ADirector | Stock Award(Grant) at price 0.00 per share. | 8.1K | — |
| May 31, 2026 | Prins Richard KDirector | Stock Award(Grant) at price 0.00 per share. | 8.1K | — |
| May 31, 2026 | Lee Howard SDirector | Stock Award(Grant) at price 0.00 per share. | 8.1K | — |
| May 31, 2026 | Gerst Diane G.Director | Stock Award(Grant) at price 0.00 per share. | 8.1K | — |
| May 31, 2026 | Deflin GayleDirector | Stock Award(Grant) at price 0.00 per share. | 8.1K | — |
| May 31, 2026 | Gaugh David RussellDirector | Stock Award(Grant) at price 0.00 per share. | 8.1K | — |
| Mar 8, 2026 | Peters William JChief Financial Officer | Stock Award(Grant) at price 0.00 per share. | 58.7K | — |
| Mar 8, 2026 | Zhou RongOfficer | Stock Award(Grant) at price 0.00 per share. | 39.4K | — |
| Mar 8, 2026 | Liawatidewi YakobOfficer and Director | Stock Award(Grant) at price 0.00 per share. | 35.5K | — |
| Mar 8, 2026 | Zhang Jack YongfengChief Executive Officer | Stock Award(Grant) at price 0.00 per share. | 253K | — |
| Dec 16, 2025 | Zhou RongOfficer | Sale at price 26.20 per share. | 9.8K | $256.38K |
| Dec 16, 2025 | Zhou RongOfficer | Conversion of Exercise of derivative security at price 11.33 per share. | 9.8K | $110.89K |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | -1.1 | -23.6 | -3.2 | 12.1 | -14.2 | 7.1 | -1.2 | 13.0 | 14.6 | 3.6 | −0.1% | ||
| 2025 | -6.1 | -18.5 | 2.0 | -15.8 | 5.3 | -10.7 | -8.8 | 46.2 | -13.0 | -4.3 | 8.6 | -3.3 | −27.9% |
| 2024 | -13.7 | -12.7 | -5.7 | -6.1 | 2.6 | -5.5 | 8.8 | 12.0 | -0.4 | 4.1 | -10.6 | -17.8 | −40.0% |
| 2023 | 8.0 | 5.3 | 17.7 | -4.6 | 24.0 | 29.5 | 5.6 | -12.2 | -13.7 | -1.6 | 24.4 | 9.8 | +120.7% |
| 2022 | -0.9 | 20.0 | 29.6 | -1.2 | 4.7 | -6.3 | 7.5 | -20.8 | -5.1 | 10.0 | -4.6 | -5.0 | +20.3% |
| 2021 | -9.6 | -3.6 | 4.5 | -5.0 | 8.7 | 6.6 | 3.9 | -6.2 | -3.3 | -1.7 | 4.7 | 19.1 | +15.8% |
| 2020 | -2.0 | -18.6 | -3.6 | 14.2 | 10.0 | 20.5 | -10.9 | 1.8 | -8.0 | 4.5 | -9.3 | 13.2 | +4.3% |
| 2019 | 14.4 | 9.2 | -17.8 | 5.7 | -10.8 | 9.7 | -4.5 | 11.5 | -11.7 | -2.6 | 1.0 | -1.1 | −3.1% |
| 2018 | -3.1 | -1.5 | 2.1 | 1.8 | -17.2 | -3.4 | 14.4 | 8.8 | 1.4 | -6.7 | 21.0 | -8.4 | +3.4% |
| 2017 | -14.5 | -1.8 | -6.3 | 4.1 | 13.0 | 4.6 | -3.2 | -7.3 | 11.6 | 1.1 | 8.4 | -1.8 | +4.5% |
| 2016 | -15.3 | -12.6 | 14.0 | 2.5 | 27.9 | 2.5 | 0.4 | 17.4 | -0.2 | -4.4 | 11.7 | -9.1 | +29.4% |
| 2015 | 4.5 | 15.4 | 6.9 | -3.3 | 6.1 | 14.6 | -7.5 | -20.8 | -9.2 | 1.3 | 29.6 | -7.3 | +22.6% |
| 2014 | -11.3 | 36.1 | -3.6 | -13.0 | 2.9 | 11.3 | +16.0% |
Amphastar Pharmaceuticals, Inc., a bio-pharmaceutical company, develops, manufactures, markets, and sells generic and proprietary injectable, inhalation, and intranasal products in the United States, China, and France. It offers BAQSIMI, a dry nasal spray used in an emergency for the treatment of severe hypoglycemia; Primatene MIST, an epinephrine inhalation product for the temporary relief of mild symptoms of intermittent asthma; Glucagon for injection emergency kit; Enoxaparin, an injectable form of low molecular weight heparin for the prevention and treatment of deep vein thrombosis; and REXTOVY and Naloxone for opioid overdose. The company also provides Cortrosyn, a lyophilized power for use as a diagnostic agent in the screening of patients with adrenocortical insufficiency; Amphadase, a bovine-sourced hyaluronidase injection; Epinephrine injection for allergic reactions; Lidocaine jelly, an anesthetic product for urological procedures; Lidocaine topical solution for various procedures; Phytonadione injection, a vitamin K1 injection for newborn babies; and emergency syringe products, including atropine, calcium chloride, dextrose, epinephrine, lidocaine, and sodium bicarbonate. In addition, it offers Albuterol sulfate inhalation aerosol for the treatment or prevention of bronchospasm; Iron sucrose injection, an iron replacement product for the treatment of iron deficiency anemia in patients with chronic kidney disease; Teriparatide injection for managing daily osteoporosis therapy; and Ipratropium Bromide HFA inhalation aerosol, an anticholinergic indicated for the maintenance treatment of bronchospasm associated with chronic obstructive pulmonary disease. Further, the company provides active pharmaceutical ingredient (API) products, such as Recombinant Human Insulin and porcine insulin API. The company was founded in 1996 and is headquartered in Rancho Cucamonga, California.
Buy / hold / sell counts