# Amphastar Pharmaceuticals Inc. (AMPH)

Source: https://www.quantisnow.com/company/AMPH
Generated: 2026-11-09T05:49:06.093Z

- Ticker: AMPH
- Exchange: NASDAQ
- Sector: Health Care
- Industry: Biotechnology: Pharmaceutical Preparations
- IPO year: 2014
- SEC CIK: 0001297184
- Website: amphastar.com

## About

Amphastar Pharmaceuticals, Inc., a specialty 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 procainamide for documented ventricular arrhythmias; neostigmine methylsulfate injection to treat myasthenia gravis and to reverse the effects of muscle relaxants; medroxyprogesterone acetate injectable suspension for the prevention of pregnancy; and Isoproterenol hydrochloride injection for mild or transient episodes of heart block, as well as manufactures and 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.

## Latest AMPH news and filings

- 2026-11-06 21:17 UTC [SEC Form 4] [CFO, EVP & TREASURER Peters William J exercised 27,000 shares at a strike of $15.05 and sold $814,669 worth of shares (28,631 units at $28.45) as part of a pre-agreed trading plan, decreasing direct ownership by 0.97% to 167,076 units (SEC Form 4)](https://www.quantisnow.com/insight/cfo-evp-treasurer-peters-william-j-exercised-27000-shares-at-6779077)
- 2026-11-05 21:40 UTC [SEC Form 10-Q] [SEC Form 10-Q filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-10-q-filed-by-amphastar-pharmaceuticals-inc-6777100)
- 2026-11-05 21:26 UTC [SEC Form 8-K] [SEC Form 8-K filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-8-k-filed-by-amphastar-pharmaceuticals-inc-6776897)
- 2026-11-05 21:10 UTC [Earnings] [Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended September 30, 2026](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-reports-financial-results-for-the-three-months-ended-6776470)
- 2026-11-05 21:05 UTC [SEC Form 144] [SEC Form 144 filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-144-filed-by-amphastar-pharmaceuticals-inc-6776255)
- 2026-11-04 21:09 UTC [SEC Form 144] [SEC Form 144 filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-144-filed-by-amphastar-pharmaceuticals-inc-6772581)
- 2026-10-29 10:00 UTC [Earnings Date] [Amphastar Pharmaceuticals to Release Third Quarter Earnings and Hold Conference Call on November 5, 2026](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-to-release-third-quarter-earnings-and-hold-conference-6762026)
- 2026-09-23 22:02 UTC [SEC Form 4] [CFO, EVP & TREASURER Peters William J sold $103,475 worth of shares (4,139 units at $25.00) as part of a pre-agreed trading plan, decreasing direct ownership by 2% to 168,707 units (SEC Form 4)](https://www.quantisnow.com/insight/cfo-evp-treasurer-peters-william-j-sold-103475-worth-of-6724518)
- 2026-09-21 22:37 UTC [SEC Form 144] [SEC Form 144 filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-144-filed-by-amphastar-pharmaceuticals-inc-6722155)
- 2026-09-17 22:19 UTC [SEC Form 4] [SENIOR EVP, PRODUCTION CENTER Zhou Rong exercised 10,000 shares at a strike of $13.35 and sold $239,404 worth of shares (10,000 units at $23.94) (SEC Form 4)](https://www.quantisnow.com/insight/senior-evp-production-center-zhou-rong-exercised-10000-shares-at-6719754)
- 2026-09-03 23:42 UTC [SEC Form 4] [SENIOR EVP, PRODUCTION CENTER Zhou Rong sold $75,306 worth of shares (3,187 units at $23.63), decreasing direct ownership by 2% to 169,203 units (SEC Form 4)](https://www.quantisnow.com/insight/senior-evp-production-center-zhou-rong-sold-75306-worth-of-6705957)
- 2026-09-01 10:00 UTC [Earnings Date] [Amphastar Pharmaceuticals to Present at the Wells Fargo 21st Annual Healthcare Conference](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-to-present-at-the-wells-fargo-21st-annual-6700320)
- 2026-08-12 22:14 UTC [SEC Form 4] [Director Prins Richard K sold $161,852 worth of shares (7,973 units at $20.30), decreasing direct ownership by 21% to 29,625 units (SEC Form 4)](https://www.quantisnow.com/insight/director-prins-richard-k-sold-161852-worth-of-shares-7973-6678742)
- 2026-08-11 20:57 UTC [SEC Form 4] [CFO, EVP & TREASURER Peters William J exercised 5,053 shares at a strike of $19.79 and sold $183,886 worth of shares (8,180 units at $22.48) as part of a pre-agreed trading plan, decreasing direct ownership by 2% to 172,846 units (SEC Form 4)](https://www.quantisnow.com/insight/cfo-evp-treasurer-peters-william-j-exercised-5053-shares-at-6676342)
- 2026-08-11 15:53 UTC [SEC Form 144] [SEC Form 144 filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-144-filed-by-amphastar-pharmaceuticals-inc-6675388)
- 2026-08-07 20:09 UTC [SEC Form 144] [SEC Form 144 filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-144-filed-by-amphastar-pharmaceuticals-inc-6671540)
- 2026-08-06 20:50 UTC [SEC Form 10-Q] [SEC Form 10-Q filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-10-q-filed-by-amphastar-pharmaceuticals-inc-6669800)
- 2026-08-06 20:32 UTC [SEC Form 8-K] [Amphastar Pharmaceuticals Inc. filed SEC Form 8-K: Results of Operations and Financial Condition, Financial Statements and Exhibits](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-inc-filed-sec-form-8-k-results-of-operations-6669577)
- 2026-08-06 20:05 UTC [Earnings] [Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended June 30, 2026](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-reports-financial-results-for-the-three-months-ended-6668822)
- 2026-07-29 10:00 UTC [Earnings Date] [Amphastar Pharmaceuticals to Release Second Quarter Earnings and Hold Conference Call on August 6, 2026](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-to-release-second-quarter-earnings-and-hold-conference-6652335)
- 2026-07-14 17:27 UTC [SEC Form SCHEDULE 13G filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-schedule-13g-filed-by-amphastar-pharmaceuticals-inc-6636533)
- 2026-07-13 23:38 UTC [SEC Form 4] [Director Pierce Anthony T was granted 7,886 shares (SEC Form 4)](https://www.quantisnow.com/insight/director-pierce-anthony-t-was-granted-7886-shares-sec-form-6635796)
- 2026-07-13 23:36 UTC [SEC Form 3] [SEC Form 3 filed by new insider Pierce Anthony T](https://www.quantisnow.com/insight/sec-form-3-filed-by-new-insider-pierce-anthony-t-6635794)
- 2026-07-13 10:01 UTC [SEC Form 8-K] [Amphastar Pharmaceuticals Inc. filed SEC Form 8-K: Leadership Update](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-inc-filed-sec-form-8-k-leadership-update-6634635)
- 2026-07-08 00:03 UTC [SEC Form 8-K] [Amphastar Pharmaceuticals Inc. filed SEC Form 8-K: Other Events](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-inc-filed-sec-form-8-k-other-events-6630727)
- 2026-06-29 12:54 UTC [Analyst Downgrade] [Amphastar Pharmaceuticals downgraded by BofA Securities with a new price target](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-downgraded-by-bofa-securities-with-a-new-price-6618455)
- 2026-06-16 12:20 UTC [FDA Approval for REXTOVY issued to AMPHASTAR PHARMS INC](https://www.quantisnow.com/insight/fda-approval-for-rextovy-issued-to-amphastar-pharms-inc-6604038)
- 2026-06-04 01:22 UTC [SEC Form 4] [Director Prins Richard K gifted 1,500 shares and was granted 8,143 shares, increasing direct ownership by 21% to 37,598 units (SEC Form 4)](https://www.quantisnow.com/insight/director-prins-richard-k-gifted-1500-shares-and-was-granted-6588287)
- 2026-06-04 01:20 UTC [SEC Form 4] [Director Lee Howard covered exercise/tax liability with 769 shares and was granted 8,143 shares, increasing direct ownership by 5% to 159,350 units (SEC Form 4)](https://www.quantisnow.com/insight/director-lee-howard-covered-exercisetax-liability-with-769-shares-and-6588284)
- 2026-06-04 00:34 UTC [SEC Form 4] [Director Zasloff Michael A was granted 8,143 shares, increasing direct ownership by 28% to 37,667 units (SEC Form 4)](https://www.quantisnow.com/insight/director-zasloff-michael-a-was-granted-8143-shares-increasing-direct-6588237)
- 2026-06-04 00:33 UTC [SEC Form 4] [Director Gerst Diane G. was granted 8,143 shares, increasing direct ownership by 34% to 31,899 units (SEC Form 4)](https://www.quantisnow.com/insight/director-gerst-diane-g-was-granted-8143-shares-increasing-direct-6588236)
- 2026-06-04 00:31 UTC [SEC Form 4] [Director Gaugh David Russell was granted 8,143 shares, increasing direct ownership by 129% to 14,447 units (SEC Form 4)](https://www.quantisnow.com/insight/director-gaugh-david-russell-was-granted-8143-shares-increasing-direct-6588232)
- 2026-06-04 00:29 UTC [SEC Form 4] [Director Deflin Gayle was granted 8,143 shares, increasing direct ownership by 75% to 19,057 units (SEC Form 4)](https://www.quantisnow.com/insight/director-deflin-gayle-was-granted-8143-shares-increasing-direct-ownership-6588228)
- 2026-06-03 20:15 UTC [SEC Form 8-K] [Amphastar Pharmaceuticals Inc. filed SEC Form 8-K: Submission of Matters to a Vote of Security Holders](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-inc-filed-sec-form-8-k-submission-of-matters-6586924)
- 2026-05-27 10:00 UTC [Market Insight] [Amphastar Pharmaceuticals to Present at the 2026 Jefferies Healthcare Conference](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-to-present-at-the-2026-jefferies-healthcare-conference-6573581)
- 2026-05-14 12:29 UTC [Analyst Downgrade] [Amphastar Pharmaceuticals downgraded by Wells Fargo with a new price target](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-downgraded-by-wells-fargo-with-a-new-price-6552617)
- 2026-05-08 12:12 UTC [Analyst Downgrade] [Amphastar Pharmaceuticals downgraded by Needham](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-downgraded-by-needham-6541120)
- 2026-05-07 20:48 UTC [SEC Form 10-Q] [SEC Form 10-Q filed by Amphastar Pharmaceuticals Inc.](https://www.quantisnow.com/insight/sec-form-10-q-filed-by-amphastar-pharmaceuticals-inc-6540024)
- 2026-05-07 20:22 UTC [SEC Form 8-K] [Amphastar Pharmaceuticals Inc. filed SEC Form 8-K: Results of Operations and Financial Condition, Financial Statements and Exhibits](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-inc-filed-sec-form-8-k-results-of-operations-6539612)
- 2026-05-07 20:05 UTC [Market Insight] [Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended March 31, 2026](https://www.quantisnow.com/insight/amphastar-pharmaceuticals-reports-financial-results-for-the-three-months-ended-6538747)

## More

- Live page with ratings, short volume, options and peers: https://www.quantisnow.com/company/AMPH
- Earnings history: https://www.quantisnow.com/earnings/AMPH
- Dividend history: https://www.quantisnow.com/dividends/AMPH
- Insider transactions: https://www.quantisnow.com/insiders/AMPH
- Options chain: https://www.quantisnow.com/options/AMPH
- SEC 8-K filings only: https://www.quantisnow.com/company/AMPH/8-k
- RSS and alerts for AMPH: https://www.quantisnow.com/docs/rss-feeds.md