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Impax Laboratories
What Does Impax Laboratories Do?
Impax Laboratories, Inc. was a specialty pharmaceutical company that developed, manufactured, and marketed bioequivalent and brand-name Klonopin (generic name clonazepam) Klonopin is used to treat seizure disorders and panic disorder.pharmaceuticals. Its operations focused on two main segments: generic drugs (Impax Generics) and proprietary brand products (Impax Specialty Pharma), particularly for central nervous system (CNS) disorders. In May 2018, Impax Laboratories was acquired by Amneal Pharmaceuticals, LLC, and the combined company now operates as Amneal Pharmaceuticals, Inc. (NYSE: AMRX). This page reflects information about Impax Laboratories prior to and including its acquisition, as well as its integration into Amneal.
Where Is Impax Laboratories's Headquarters?
HQ Function
Served as the primary corporate office, housing executive leadership, administrative functions, research and development, and some manufacturing operations.
Notable Features:
The Hayward facility included modern office spaces, advanced research and development laboratories, and manufacturing capabilities tailored for pharmaceutical production.
Work Culture:
Impax fostered a work culture centered on innovation, scientific rigor, quality, and collaboration, aimed at developing and delivering valuable pharmaceutical products.
HQ Significance:
The Hayward headquarters was central to Impax's strategic decision-making, R&D efforts for both generic and specialty drugs, and overall operational management before its integration into Amneal.
Values Reflected in HQ: The headquarters embodied Impax's commitment to quality in manufacturing, innovation in drug development, and its focus on addressing unmet medical needs.
Location:
Prior to its acquisition, Impax Laboratories had a focused global presence with primary operations in the United States (California for HQ, R&D, and manufacturing; Pennsylvania area for specialty pharma commercial operations) and a significant manufacturing and R&D facility in Taiwan. These operations supported drug development, manufacturing, and commercialization for U.S. and select international markets. Its functions are now integrated into Amneal Pharmaceuticals' broader global footprint.
Street Address:
30831 Huntwood Ave
City:
Hayward
State/Province:
California
Country:
USA
Where Else Does Impax Laboratories Operate Around the World?
New Taipei City, Taiwan
Address: No. 35, Keyuan Rd., Zhunan Township, Miaoli County 350, Taiwan, R.O.C.
Supported Impax's generics division by providing cost-effective manufacturing, API sourcing, and product development for various international markets.
Philadelphia, Pennsylvania, USA (Area)
Address: Specific address varied, but operations were centered in the greater Philadelphia area.
Focused on the marketing, sales, and strategic development of Impax's branded pharmaceutical portfolio in the U.S. market.
Buying Intent Signals for Impax Laboratories
Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.
Who's Leading Impax Laboratories? Meet the Executive Team
As of April 2025, Impax Laboratories' leadership includes:
Who's Investing in Impax Laboratories?
Impax Laboratories has been backed by several prominent investors over the years, including:
What Leadership Changes Has Impax Laboratories Seen Recently?
Impax Laboratories was acquired by Amneal Pharmaceuticals in May 2018 and ceased to operate as an independent entity. Therefore, there have been no executive hires or exits specifically for 'Impax Laboratories' in the last 12 months. Any leadership changes would be within the context of Amneal Pharmaceuticals.
What Technology (Tech Stack) Is Used byImpax Laboratories?
Discover the tools Impax Laboratories uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.
Impax Laboratories Email Formats and Examples
Historically, Impax Laboratories likely used common corporate email formats. Given the company's acquisition by Amneal Pharmaceuticals, email addresses with the @impaxlabs.com domain are no longer active. For current communication, refer to Amneal Pharmaceuticals' contact information.
[first_initial][last]@impaxlabs.com or [first].[last]@impaxlabs.com
Format
jdoe@impaxlabs.com or john.doe@impaxlabs.com
Example
0%
Success rate
What's the Latest News About Impax Laboratories?
Amneal Pharmaceuticals • May 7, 2018
Amneal Pharmaceuticals and Impax Laboratories Complete Business Combination
Amneal Pharmaceuticals LLC and Impax Laboratories, Inc. announced the successful completion of their business combination, creating Amneal Pharmaceuticals, Inc., a new leader in generics and specialty pharmaceuticals. The combined entity began trading on the New York Stock Exchange under the ticker symbol AMRX....more
GlobeNewswire (Impax Press Release) • October 17, 2017
Amneal Pharmaceuticals and Impax Laboratories to Combine, Creating Diversified Leader in U.S. Generics and Specialty Pharma
Impax Laboratories announced it entered into a definitive agreement to combine with Amneal Pharmaceuticals. The transaction was valued at approximately $1.5 billion and aimed to create a more robust and diversified pharmaceutical company....more
Impax Laboratories (via PR Newswire) • January 9, 2015
Impax Receives FDA Approval of RYTARY™ (carbidopa and levodopa) Extended-Release Capsules for Treatment of Parkinson's Disease
Impax Laboratories announced that the U.S. Food and Drug Administration (FDA) approved RYTARY (IPX066), an extended-release oral capsule formulation of carbidopa-levodopa, for the treatment of Parkinson's disease, post-encephalitic parkinsonism, and parkinsonism that may follow carbon monoxide intoxication or manganese intoxication. This was a significant milestone for Impax's specialty pharma division....more
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