Amphastar Pharmaceuticals Inc
Amphastar Pharmaceuticals Inc (AMPH) Options Open Interest
AMPH options open interest is 709 contracts. The 2-week average daily volume is 13 contracts across the chain.
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Monitoring AMPH open interest helps you see where real money is positioned on Amphastar Pharmaceuticals Inc's options and which strikes are attracting the most commitment from traders. Amphastar Pharmaceuticals Inc's open interest reflects the total number of outstanding contracts that have not been closed or exercised, making it a powerful gauge of liquidity, conviction, and potential support and resistance zones. Use our scanner to monitor AMPH options open interest in real time and find the strikes that matter.
Open interest is distinct from volume: volume counts how many contracts are traded in a session, while open interest counts how many remain open at the end of the day. Rising AMPH options open interest alongside rising volume suggests new positions are being built, while falling open interest signals positions are being closed. Heavy open interest at specific strikes often acts as a magnet near expiration and can hint at where dealers and large traders expect Amphastar Pharmaceuticals Inc to settle.
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. The company operates through two segments, Finished Pharmaceutical Products and API. It offers Primatene Mist, an over-the-counter epinephrine inhalation product for the temporary relief of mild symptoms of intermittent asthma; Enoxaparin, a low molecular weight heparin to prevent and treat deep vein thrombosis; Naloxone for opioid overdose; Glucagon for injection emergency kit; and Cortrosyn, a lyophilized powder for use as a diagnostic agent in the screening of patients with adrenocortical insufficiency.
The company also provides Amphadase, a bovine-sourced hyaluronidase injection to absorb and disperse other injected drugs; Epinephrine injection for the emergency treatment of 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; emergency syringe products for emergency use in hospital settings; morphine injection for use with patient controlled analgesia pumps; and lorazepam injection for surgery and medical procedures. In addition, it offers neostigmine methylsulfate injection to treat myasthenia gravis and to reverse the effects of muscle relaxants; and Isoproterenol hydrochloride injection for mild or transient episodes of heart block. Further, the company distributes recombinant human insulin active pharmaceutical ingredients (API) and porcine insulin API. It serves hospitals, care facilities, alternate care sites, clinics, and doctors' offices. The company was founded in 1996 and is headquartered in Rancho Cucamonga, California.
Pin risk into expiration, dealer positioning, liquidity checks for large orders — all of it starts with knowing where AMPH open interest is concentrated. Our scanner maps Amphastar Pharmaceuticals Inc's open interest across every strike and expiry, flags unusual buildups, and lets you drill into the contracts that institutional money is actually holding. Trade Amphastar Pharmaceuticals Inc's options open interest as the signal it is, not as an afterthought.
| 22.50 | 0.70 | 3.70 | 2.20 | 213% | +0.6923 | 201 |
| 40.00 | — | 3.40 | 3.40 | 1,000% | +0.3416 | 89 |
| 30.00 | — | 1.15 | 1.15 | 457% | +0.2866 | 22 |
| 25.00 | — | 2.50 | 2.50 | 450% | +0.5061 | 15 |
| 20.00 | 2.10 | 6.10 | 4.10 | 206% | +0.9116 | 14 |
| 12.50 | — | 3.40 | 3.40 | 1,000% | -0.0980 | 60 |
| 22.50 | — | 3.40 | 3.40 | 651% | -0.3582 | 10 |
| 17.50 | — | 2.55 | 2.55 | 934% | -0.2087 | 8 |
| 15.00 | — | 3.40 | 3.40 | 1,000% | -0.1523 | 5 |
| 20.00 | — | 3.40 | 3.40 | 872% | -0.2740 | 4 |
As of September 17, 2026
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