Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended

Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended September 30, 2025

RANCHO CUCAMONGA, CA - November 6, 2025 - Amphastar Pharmaceuticals, Inc. (NASDAQ: AMPH) ("Amphastar" or the "Company"), a biopharmaceutical company focused on developing, manufacturing, and marketing complex generic and proprietary injectable, inhalation, and intranasal products, today reported results for the three months ended September 30, 2025.

"Amphastar delivered another strong quarter, led by double-digit growth from BAQSIMI , which achieved a 14% increase in revenue compared to the same period last year. Additionally, we received FDA approval and launched iron sucrose injection, a key generic alternative which expands patient access to affordable therapies while contributing to our revenue growth. This achievement underscores our commitment to advancing complex generics and leveraging our domestic in-house manufacturing expertise to deliver high-quality therapies to patients. In addition, we bolstered our proprietary pipeline through an exclusive licensing agreement with Nanjing Anji Biotechnology to develop and commercialize three novel peptides targeting high-growth markets across oncology and ophthalmology," said Dr. Jack Zhang, Amphastar's President and Chief Executive Officer. "Together, our sustained commercial momentum, strategic pipeline expansion, and recent FDA approval, position Amphastar to accelerate growth and drive long-term value across its portfolio."

* Adjusted non-GAAP net income and adjusted non-GAAP diluted EPS are non-GAAP financial measures. Please see the discussion in the section entitled "Non-GAAP Financial Measures" and the reconciliation of GAAP to non-GAAP financial measures in Table III of this press release.

Third Quarter Results

Changes in product revenues, net as compared to the third quarter of the prior year were primarily driven by:

Changes in the cost of revenues and gross margin were primarily driven by:

The change in non-operating expenses, net is primarily due to a change in Other income (expenses), net, as a result of foreign currency fluctuation, as well as mark-to-market adjustments relating to our interest rate swap contracts during the three months ended September 30, 2025.

Cash flow provided by operating activities for the nine months ended September 30, 2025, was $123.3 million.

Pipeline Information

The Company currently has three abbreviated new drug applications ("ANDAs") and one biosimilar insulin candidate filed with the FDA targeting products with a combined market size exceeding $2 billion, along with three biosimilar products in development targeting products with a market size exceeding $6 billion, and two generic products in development targeting products with a market size of over $1 billion. This market information is based on IQVIA data for the 12 months ended September 30, 2025. The Company is developing multiple proprietary products with injectable and intranasal dosage forms.

The Company entered into an exclusive license agreement with Anji for the development, manufacturing, use, and commercialization of three proprietary peptides. The first product is based on the discovery by Anji of an endogenous peptide that demonstrates a novel mechanism of action that potentially suppresses the growth and metastasis of multiple poorly treated cancers. The second product is a novel peptide-docetaxel conjugate that targets a specific receptor, designed to improve the selectivity and bioavailability of docetaxel. It is designed to reduce docetaxel-induced toxicity, which will improve the efficacy and safety of current taxane therapies. The third product is an anti-vascular endothelial growth factor receptor (VEGFR) peptide of novel design, developed as a topical eye drop for the treatment of wet age-related macular degeneration (wAMD). It is intended to be an alternative to the routine eye injections used for current treatment.

Conference Call Information

The Company will hold a conference call to discuss its financial results today, November 6, 2025, at 2:00 p.m. Pacific Time.

To access the conference call, dial toll-free (877) 407-0989 or (201) 389-0921 for international callers, ten minutes before the conference.

The call can also be accessed on the Investors page on the Company's website at www.amphastar.com.

Non-GAAP Financial Measures

To supplement its consolidated financial statements, which are prepared and presented in accordance with U.S. generally accepted accounting principles ("GAAP"), the Company is disclosing non-GAAP financial measures when providing financial results. The Company believes that an evaluation of its ongoing operations (and comparisons of its current operations with historical and future operations) would be difficult if the disclosure of its financial results were limited to financial measures prepared only in accordance with GAAP. As a result, the Company is disclosing certain non-GAAP results, including (i) Adjusted non-GAAP net income (loss) and (ii) Adjusted non-GAAP diluted EPS, which generally excludes amortization expense, share-based compensation, impairment charges, expenses related to our acquisition of

BAQSIMI , certain debt issuance costs, legal settlements, and other one-time events in order to supplement investors' and other readers' understanding and assessment of the Company's financial performance because the Company's management uses these measures internally for forecasting, budgeting, and measuring its operating performance. Whenever the Company uses such non-GAAP measures, it will provide a reconciliation of non-GAAP financial measures to their most directly comparable GAAP financial measures. Investors and other readers are encouraged to review the related GAAP financial measures and the reconciliation of non-GAAP measures to their most directly comparable GAAP measures set forth below and should consider non-GAAP measures only as a supplement to, not as a substitute for or as a superior measure to, measures of financial performance prepared in accordance with GAAP.

This press release contains market data that we obtained from industry sources. These sources do not guarantee the accuracy or completeness of the information. Although we believe that our industry sources are reliable, we do not independently verify the information. The market data may include projections that are based on a number of other projections. While we believe these assumptions to be reasonable and sound as of the date of this press release, actual results may differ from the projections.

About Amphastar Pharmaceuticals, Inc.

Amphastar is a biopharmaceutical company that focuses primarily on developing, manufacturing, marketing, and selling technically-challenging generic and proprietary injectable, inhalation, and intranasal products. Additionally, the Company sells insulin API products. Most of the Company's finished products are used in hospital or urgent care clinical settings and are primarily contracted and distributed through group purchasing organizations and drug wholesalers. More information and resources are available at www.amphastar.com.

Amphastar's logo and other trademarks or service marks of Amphastar, including, but not limited to Amphastar , BAQSIMI , Primatene MIST , REXTOVY , Amphadase , and Cortrosyn , are the property of Amphastar.

Forward-Looking Statements

All statements in this press release and in the conference call referenced above that are not historical are forward-looking statements, including, among other things, statements relating to our expectations regarding future financial performance and business trends, our future growth, sales and marketing of our products, market size and expansion, product portfolio, product development, the timing of FDA filings or approvals, the timing of product launches, acquisitions and other matters related to our pipeline of product candidates, the timing and results of clinical trials, the impact of our products, including their potential for continued revenue growth, the strategic trajectory of and market for our product pipeline, our ability to leverage our existing expertise and technology, the impacts of any licensing agreements and ability to commercialize additional therapies, our manufacturing in-house expertise, our commercial momentum and position in the market. These statements are not facts but rather are based on Amphastar's historical performance and our current expectations, estimates, and projections regarding our business, operations, and other similar or related factors. Words such as "may," "might," "will," "could," "would," "should," "anticipate," "predict," "potential," "continue," "expect," "intend," "plan," "project," "believe," "estimate," and other similar or related expressions are used to identify these forward-looking statements, although not all forward-looking statements contain these words. You should not place undue reliance on forward-looking statements because they involve known and unknown risks, uncertainties, and assumptions that are difficult or impossible to predict and, in some cases, beyond Amphastar's control. Actual results may differ materially from those in the forward-looking statements as a result of a number of factors, including those described in Amphastar's filings with the Securities and Exchange Commission ("SEC"), including in our Annual Report on Form 10-K for the year ended December 31, 2024, filed with the SEC on March 3, 2025, in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2025, filed with the SEC on May 8, 2025, in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2025, filed with the SEC on August 7, 2025, and our other filings or reports that we may file with the SEC. In particular, there can be no guarantee that our sales strategies will be successful, or that we will continue to experience significant sales of BAQSIMI . You can locate these reports through our website at http://ir.amphastar.com and on the SEC's website at www.sec.gov. The forward-looking statements in this release speak only as of the date of the release. Amphastar undertakes no obligation to revise or update information or any forward-looking statements in this press release or the conference call referenced above to reflect events or circumstances in the future, even if new information becomes available or if subsequent events cause our expectations to change.

Contact Information:

Amphastar Pharmaceuticals, Inc.

Chief Financial Officer

Amphastar Pharmaceuticals, Inc.

Condensed Consolidated Statement of Operations

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Amphastar Pharmaceuticals, Inc.

Condensed Consolidated Balance Sheets

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Amphastar Pharmaceuticals, Inc.

Reconciliation of Non-GAAP Measures

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