AMPH (Amphastar Pharmaceuticals) Insider Ownership: 3.11 % (As of Jul. 31, 2026)

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AMPH Amphastar Pharmaceuticals Inc AMPH
84 GF Score
Price $19.73
GF Value $49.09
Valuation Significantly Undervalued
! 4 Warning Signs
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What is Amphastar Pharmaceuticals Insider Ownership?

Amphastar Pharmaceuticals AMPH -3.09% 84 Insider Ownership is 3.11 % as of Jul. 31, 2026. GuruFocus rates AMPH with a GF Score™ of 84/100 and a GF Value™ of $49.09 (Significantly Undervalued). The stock has 4 warning signs investors should review.

Insider ownership is the percentage of shares that are owned by company insiders relative to the total shares outstanding. As of today, Amphastar Pharmaceuticals's insider ownership is 3.11%.

Institutional Ownership is the percentage of shares that are owned by institutions out of the total shares outstanding. As of today, Amphastar Pharmaceuticals's Institutional Ownership is 79.57%.

Float Percentage Of Total Shares Outstanding is the percentage of float shares relative to the total shares outstanding. As of today, Amphastar Pharmaceuticals's Float Percentage Of Total Shares Outstanding is 47.79%.

Amphastar Pharmaceuticals Insider Ownership Historical Data

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The historical data trend for Amphastar Pharmaceuticals's Insider Ownership can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Amphastar Pharmaceuticals Insider Ownership Chart

Amphastar Pharmaceuticals Historical Data

The historical data trend for Amphastar Pharmaceuticals can be seen below:

2025-06-30 2025-07-31 2025-08-31 2025-09-30 2025-10-31 2025-11-30 2026-01-31 2026-02-28 2026-05-31 2026-06-30
Insider Ownership 2.58 2.59 2.62 2.62 2.62 2.65 2.64 2.66 3.01 3.11
AMPH
84GF Score
Amphastar Pharmaceuticals Inc AMPH
Insider Ownership is just one metric. See GF Score™, valuation, warning signs, and more.
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Amphastar Pharmaceuticals Insider Ownership Calculation

The percentage of shares that are owned by company insiders relative to the total shares outstanding.

Frequently Asked Questions Learn more about Insider Ownership →
What does a Insider Ownership of 3.11 % mean?
Amphastar Pharmaceuticals (AMPH) has a Insider Ownership of 3.11 % as of Jul. 31, 2026. Insider ownership equals the percent of shares owned by company insiders relative to total shares. View historical data on Amphastar Pharmaceuticals and its competitors.
Is Amphastar Pharmaceuticals' Insider Ownership too high?
Amphastar Pharmaceuticals' current Insider Ownership is 3.11 %. Overall, Amphastar Pharmaceuticals has a GF Score™ of 84/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Amphastar Pharmaceuticals' Insider Ownership compare to ESPR and NIKA?
Amphastar Pharmaceuticals' Insider Ownership of 3.11 % can be compared against companies in the Drug Manufacturers industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Insider Ownership for a Drug Manufacturers company?
A good Insider Ownership depends on the Drug Manufacturers industry context. However, Insider Ownership should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Insider Ownership mean?
A high Insider Ownership can signal that a stock is expensive relative to its fundamentals. Insider ownership equals the percent of shares owned by company insiders relative to total shares. View historical data on Amphastar Pharmaceuticals and its competitors. Amphastar Pharmaceuticals's current Insider Ownership is 3.11 %. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Amphastar Pharmaceuticals stock overvalued right now?
Based on GuruFocus' analysis, Amphastar Pharmaceuticals (AMPH) is currently considered Significantly Undervalued. The stock's GF Value™ is $49.09, compared to a current price of $19.73 — trading 59.8% below its estimated fair value. The current Insider Ownership is 3.11 %. Amphastar Pharmaceuticals' overall GF Score™ is 84/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Insider Ownership calculated?
Insider Ownership is calculated from a company's financial statements. For Amphastar Pharmaceuticals (AMPH), the current Insider Ownership is 3.11 % as of Jul. 31, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is Amphastar Pharmaceuticals (AMPH) Overvalued in 2026?

Based on GuruFocus' analysis, Amphastar Pharmaceuticals stock appears to be undervalued. The current stock price of $19.73 is trading 59.8% below its estimated GF Value™ of $49.09. GuruFocus considers Amphastar Pharmaceuticals to be Significantly Undervalued.

Key valuation signals for AMPH:

  • Insider Ownership: 3.11 %
  • GF Value™: $49.09 vs. price of $19.73 (59.8% below fair value)
  • GF Score™: 84/100 with 4 warning signs

No single metric tells the full story. See the AMPH stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.

Amphastar Pharmaceuticals Business Description

Other Exchanges 29A:Germany
Address 11570 6th Street, Rancho Cucamonga, CA, USA, 91730
Amphastar Pharmaceuticals Inc is a bio-pharmaceutical company focusing on developing, manufacturing, marketing, and selling technically challenging generic and proprietary injectable, inhalation, and intranasal products, as well as insulin active pharmaceutical ingredient (or insulin API products. The company's finished products are used in hospital or urgent care clinical settings and are contracted and distributed through group purchasing organizations and drug wholesalers. The company has one reportable segment: pharmaceutical products. Geographically, the business presence of the firm is seen in the United States, China, and France, of which the U.S. accounts for the majority of the revenue.
84GF Score

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Insider Ownership is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$19.73
Price
$49.09
GF Value