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Amphastar Pharmaceuticals Inc
NASDAQ:AMPH

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Amphastar Pharmaceuticals Inc
NASDAQ:AMPH
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Price: 20.45 USD 1.04% Market Closed
Market Cap: $927.8m

During the last 3 months Amphastar Pharmaceuticals Inc insiders have not bought any shares, and have not sold any shares. The stock price has dropped by 23% over this period (open performance analysis).

The last transaction was made on Dec 17, 2025 by Zhou Rong , who sold 256.4k USD worth of AMPH shares.

Last Transactions:
Zhou Rong
$-256.4k
Petersen Floyd F.
$-62.9k
Petersen Floyd F.
Director
$-44.6k
Prins Richard K
$-113.3k
Petersen Floyd F.
$-441.8k
Petersen Floyd F.
$-12.6k
Petersen Floyd F.
$-13.6k
Petersen Floyd F.
$-15.5k
Petersen Floyd F.
$-10.4k
Petersen Floyd F.
$-11.7k
Petersen Floyd F.
$-12.8k
Petersen Floyd F.
$-12k
Petersen Floyd F.
$-14.2k
Petersen Floyd F.
$-28k
Peters William J
$-116.5k
Zhou Rong
$-361.8k
Zhou Rong
$-311k
Prins Richard K
$-437.7k
Zhou Rong
$-336.9k
Prins Richard K
$-244k
Liawatidewi Yakob
$-271.4k
Peters William J
$-386.5k
Zhou Rong
$-144.8k
Petersen Floyd F.
$-139.4k
Zhou Rong
$-193.4k
Prins Richard K
$-736.6k
Peters William J
$-454.8k
Peters William J
$-120.9k
Petersen Floyd F.
$-124.2k
Petersen Floyd F.
$-21.3k
Petersen Floyd F.
$-20.8k
Petersen Floyd F.
$-21.7k
View All Transactions

During the last 3 months Amphastar Pharmaceuticals Inc insiders have not bought any shares, and have not sold any shares. The stock price has dropped by 23% over this period (open performance analysis).

The last transaction was made on Dec 17, 2025 by Zhou Rong , who sold 256.4k USD worth of AMPH shares.

Sold
0-3
months
0 USD
0
3-6
months
931.6k USD
3
6-9
months
39.5k USD
1
9-12
months
36.6k USD
1
Bought
0-3
months
No Insider Transactions
0
0 USD
3-6
months
0
0 USD
6-9
months
0
0 USD
9-12
months
0
0 USD

Amphastar Pharmaceuticals Inc
Insider Trading Chart

Amphastar Pharmaceuticals Inc
Insiders Performance

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Median Return
Win Rate

Amphastar Pharmaceuticals Inc
Last Insider Transactions

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Amphastar Pharmaceuticals Inc
Glance View

Amphastar Pharmaceuticals Inc., established in the heart of Rancho Cucamonga, California, has carved out a significant niche in the pharmaceuticals industry with its diverse portfolio centered on developing, manufacturing, and marketing generic and proprietary injectable and inhalation products. Emerging from its storied beginnings in the mid-1990s, the company’s pragmatic approach to pharmaceutical innovation emphasizes affordability and accessibility. Through strategic acquisitions and a robust in-house research and development team, Amphastar has consistently expanded its product lines, which include critical care, anti-infective, hormonal, and neuromuscular medications, seamlessly marrying clinical necessity with cost efficiency to serve both the domestic U.S. market and an expanding international clientele. Key to Amphastar's business model is its vertically integrated production process, which enables it to exercise stringent control over quality while simultaneously optimizing cost-effectiveness. The company's financial engine is fueled by its generic drug segment, where it capitalizes on the expiration of branded drug patents. By swiftly introducing generic counterparts, Amphastar taps into established demand, thus ensuring steady revenue streams. Additionally, the company's proprietary products, developed through committed R&D efforts, serve to differentiate its offerings in an otherwise commoditized sector, enabling premium pricing and fostering a competitive edge. This clever blend of generic and proprietary product strategy, paired with operational efficiency, underscores Amphastar's role as a formidable player in the pharmaceuticals market, adeptly navigating the complex landscape of regulatory compliance and healthcare trends.

AMPH Intrinsic Value
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What is Insider Trading?

Insider trading refers to the buying or selling of a company’s stock by individuals with access to non-public, material information about the company.

While legal insider trading occurs when insiders follow disclosure rules, illegal insider trading involves trading based on confidential information and is prohibited by law.

Why is Insider Trading Important?

It isn't a coincidence that corporate executives seem to always buy at the right times. After all, they have access to every bit of company information you could ever want.

However, the fact that company executives have unique insights doesn't mean that individual investors are always left in the dark. Insider trading data is out there for all who want to use it.

Peter Lynch

Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.

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