AMPH Insider Trading

Insider Ownership Percentage: 27.10%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $3,963,385.79

Amphastar Pharmaceuticals Insider Trading History Chart

This chart shows the insider buying and selling history at Amphastar Pharmaceuticals by year and by quarter.

Skip ChartChart Data in Insider Trading History Table
2022202320242025$0bought$117ksoldQ1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1-$10M$0$10MTotal Insider BuyingTotal Insider Selling

Amphastar Pharmaceuticals Share Price & Price History

Current Price: $28.43
Price Change: Price Decrease of -0.07 (-0.25%)
As of 03/28/2025 05:00 PM ET

This chart shows the closing price history over time for AMPH up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365
MayJunJulAugSepOctNovDecJanFebMar$28.43Closing price on 03/29/25:

SEC Filings (Institutional Ownership Changes) for Amphastar Pharmaceuticals (NASDAQ:AMPH)

65.09% of Amphastar Pharmaceuticals stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at AMPH by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table
2022202320242025$110Mbought$89MsoldQ1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1-$100M-$50M$0$50M$100MTotal InflowsTotal Outflows
Amphastar Pharmaceuticals logo
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 nasal spray for the treatment of severe hypoglycemia; Primatene Mist, an over-the-counter epinephrine inhalation product for the temporary relief of mild symptoms of intermittent asthma; Enoxaparin, to prevent and treat deep vein thrombosis; REXTOVY and Naloxone for opioid overdose; Glucagon for injection emergency kit; and Cortrosyn, for use as a diagnostic agent in the screening of patients with adrenocortical insufficiency. The company provides Amphadase, an injection to absorb and disperse other injected drugs; 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; emergency syringe products; 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; Isoproterenol hydrochloride injection for mild or transient episodes of heart block; Ganirelix Acetate injection for the inhibition of premature luteinizing hormone surges; Vasopressin to increase blood pressure; and Regadenoson, a stress agent for radionuclide myocardial perfusion imaging. Further, the company distributes recombinant human insulin APIs and porcine insulin API. Additionally, it develops generic product candidates, such as injectable, inhalation, and analytical technologies; biosimial product candidates; and intranasal epinephrine for the treatment of allergic reactions. The company was founded in 1996 and is headquartered in Rancho Cucamonga, California.
Read More on Amphastar Pharmaceuticals

Today's Range

Now: $28.43
Low: $28.23
High: $28.71

50 Day Range

MA: $31.07
Low: $26.24
High: $37.12

52 Week Range

Now: $28.43
Low: $25.89
High: $53.96

Volume

386,842 shs

Average Volume

438,844 shs

Market Capitalization

$1.35 billion

P/E Ratio

9.48

Dividend Yield

N/A

Beta

0.77

Who are the company insiders with the largest holdings of Amphastar Pharmaceuticals?

Amphastar Pharmaceuticals' top insider shareholders include:
  1. Mary Z Luo (COO)
  2. Howard Lee (Director)
  3. Rong Zhou (EVP)
  4. William J Peters (CFO)
  5. Floyd F Petersen (Director)
  6. Yakob Liawatidewi (EVP)
  7. Richard K Prins (Director)
  8. Michael A Zasloff (Director)
Learn More about top insider investors at Amphastar Pharmaceuticals.

Who are the major institutional investors of Amphastar Pharmaceuticals?

Amphastar Pharmaceuticals' top institutional shareholders include:
  1. Vanguard Group Inc. — 5.65%
  2. Pacer Advisors Inc. — 2.81%
  3. Dimensional Fund Advisors LP — 2.49%
  4. Fuller & Thaler Asset Management Inc. — 2.36%
  5. Epoch Investment Partners Inc. — 2.29%
  6. Boston Trust Walden Corp — 2.04%
Learn More about top institutional investors of Amphastar Pharmaceuticals stock.

Which institutional investors are selling Amphastar Pharmaceuticals stock?

During the previous quarter, AMPH stock was sold by these institutional investors:
  1. Federated Hermes Inc.
  2. UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
  3. JPMorgan Chase & Co.
  4. Portolan Capital Management LLC
  5. American Century Companies Inc.
  6. Victory Capital Management Inc.
  7. Fuller & Thaler Asset Management Inc.
  8. Nuveen Asset Management LLC
In the last year, company insiders that have sold Amphastar Pharmaceuticals company stock include:
  1. Mary Z Luo (COO)
  2. Howard Lee (Director)
  3. Rong Zhou (EVP)
  4. William J Peters (CFO)
  5. Floyd F Petersen (Director)
Learn More investors selling Amphastar Pharmaceuticals stock.

Which institutional investors are buying Amphastar Pharmaceuticals stock?

During the last quarter, AMPH stock was bought by institutional investors including:
  1. Pacer Advisors Inc.
  2. Boston Trust Walden Corp
  3. Boston Partners
  4. Wealthfront Advisers LLC
  5. Systematic Financial Management LP
  6. Dimensional Fund Advisors LP
  7. D. E. Shaw & Co. Inc.
  8. Raymond James Financial Inc.