AMPH on Nasdaq

Amphastar Pharmaceuticals, Inc.

In its 2026 annual report the company says: “We are a biopharmaceutical company focusing on developing, manufacturing, and commercializing technically challenging generic and proprietary injectable, inhalation, and intranasal products, as well as active pharmaceutical ingredient, or API products. We currently manufacture and sell over 25 prescription pharmaceutical products, and an over-the-counter product, Primatene MIST ®.”4 It is headquartered in Rancho Cucamonga, California.1 Its shares trade on Nasdaq under the symbol AMPH.1

Price unavailable

Last updated Oct 21, 2026.

Overview

Compare with SUPERNUS PHARMACEUTICALS, INC., Pacira BioSciences, Inc. or Emergent BioSolutions, or pick any stock.

  • TickerAMPH on Nasdaq1
  • IndustryPharmaceutical Preparations1
  • HeadquartersRancho Cucamonga, California1
  • Business address11570 Sixth Street, Rancho Cucamonga, Ca 917302
  • Filer categoryLarge accelerated filer2

We are a biopharmaceutical company focusing on developing, manufacturing, and commercializing technically challenging generic and proprietary injectable, inhalation, and intranasal products, as well as active pharmaceutical ingredient, or API products. We currently manufacture and sell over 25 prescription pharmaceutical products, and an over-the-counter product, Primatene MIST ® .4 From its latest annual report

Financials

From the company’s reports to the SEC. Every number links to the filing it came from.

Key numbers, fiscal 2025

49.5%Gross margin5
19.5%Operating margin5
13.6%Net margin5
-1.7%Revenue growth, 20255
12.4%Return on equity5
0.79×Debt to equity5
$121.2MFree cash flow5

What sells

Revenue by product, business segment and region, as the company reports it to the SEC.

Regions

United States brought in 95% of the revenue Amphastar Pharmaceuticals, Inc. broke down this way in fiscal 2025.

  1. United States$681.4M595%down 4% from 2024
  2. France$35.3M55%up 77% from 2024
  3. China$3.2M50%down 27% from 2024
Regions by year
Regions202320242025
United States$635.2M$707.7M$681.4M
France$4.7M$19.9M$35.3M
China$4.5M$4.3M$3.2M

Where the money goes

Where each dollar of revenue went, fiscal 2025

  • Cost of revenue51¢$363.8M
  • Research and development12¢$85.8M
  • Other costs20¢$146.6M
  • Income tax4¢$25.5M
  • Profit14¢$98.1M

Out of $719.9M in revenue.5

Where each dollar of operating cash went, fiscal 2025

  • Capital spending22¢$34.9M
  • Share buybacks48¢$75.6M
  • Kept or used elsewhere29¢$45.6M

Out of $156.1M of cash from operations.5

Financial statements

Revenue67895$719.9M in 2025+123% since 2019
0$200.0M$400.0M$600.0M$800.0M2019: $322.4M$322.4M20192020: $349.8M$349.8M2020+9%2021: $437.8M$437.8M2021+25%2022: $499.0M$499.0M2022+14%2023: $644.4M$644.4M2023+29%2024: $732.0M$732.0M2024+14%2025: $719.9M$719.9M2025−2%
Gross profit67895$356.1M in 2025+170% since 2019
0$100.0M$200.0M$300.0M$400.0M2019: $131.9M$131.9M20192020: $143.3M$143.3M2020+9%2021: $199.7M$199.7M2021+39%2022: $248.9M$248.9M2022+25%2023: $351.1M$351.1M2023+41%2024: $373.9M$373.9M2024+6%2025: $356.1M$356.1M2025−5%
Operating income67895$140.4M in 2025
-$100.0M0$100.0M$200.0M$300.0M2019: -$39.0K-$39.0K20192020: $11.0M$11.0M20202021: $69.9M$69.9M2021+538%2022: $107.5M$107.5M2022+54%2023: $197.0M$197.0M2023+83%2024: $205.4M$205.4M2024+4%2025: $140.4M$140.4M2025−32%
Net income67895$98.1M in 2025+100% since 2019
0$50.0M$100.0M$150.0M$200.0M2019: $48.9M$48.9M20192020: $1.4M$1.4M2020−97%2021: $62.1M$62.1M2021+4327%2022: $91.4M$91.4M2022+47%2023: $137.5M$137.5M2023+51%2024: $159.5M$159.5M2024+16%2025: $98.1M$98.1M2025−39%

Every line of the income statement as filed: the last 3 fiscal years, latest first.5

Period ending2025-12-312024-12-312023-12-31
Revenues$719.9M$732.0M$644.4M
Cost of revenues$363.8M$358.1M$293.3M
Gross profit$356.1M$373.9M$351.1M
Selling, distribution, and marketing$43.9M$37.8M$28.9M
General and administrative$85.9M$56.7M$51.5M
Research and development$85.8M$73.9M$73.7M
Total operating expenses$215.7M$168.4M$154.1M
Income from operations$140.4M$205.4M$197.0M
Interest income$8.7M$10.6M$5.5M
Interest expense-$25.5M-$30.3M-$27.2M
Other income (expenses), net$23.0K$4.1M-$3.9M
Total non-operating income (expenses), net-$16.8M-$15.7M-$25.6M
Income before income taxes$123.6M$189.8M$171.4M
Income tax provision$25.5M$29.7M$31.8M
Income before equity in losses of unconsolidated affiliate$98.1M$160.1M$139.5M
Equity in losses of unconsolidated affiliates-$573.0K-$2.0M
Net income$98.1M$159.5M$137.5M
Basic$2.10$3.29$2.85
Diluted$2.03$3.06$2.60
Basic (in shares)46.7M shares48.4M shares48.3M shares
Diluted (in Shares)48.2M shares52.1M shares53.0M shares

Compare Amphastar Pharmaceuticals, Inc. with another company

Corporate structure

Amphastar Pharmaceuticals, Inc. sits at the top of its group. 7 entities, 4 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of Amphastar Pharmaceuticals, Inc.

  • DIMENSIONAL FUND ADVISORS LP Filed SCHEDULE 13G on Amphastar Pharmaceuticals, Inc., latest Jul 14, 2026
  • VANGUARD GROUP INC Filed SCHEDULE 13G/A on Amphastar Pharmaceuticals, Inc., latest Mar 26, 2026 (4 filings since Feb 9, 2022)
  • BlackRock Filed SCHEDULE 13G/A on Amphastar Pharmaceuticals, Inc., latest Oct 17, 2025 (5 filings since Jan 28, 2022)
  • Jack Y. Zhang Filed SCHEDULE 13G/A on Amphastar Pharmaceuticals, Inc., latest Feb 7, 2025 (4 filings since Feb 11, 2022)
  • Federated Hermes Filed SC 13G/A on Amphastar Pharmaceuticals, Inc., latest Mar 6, 2024 (4 filings since Feb 14, 2022)
  • Amphastar Pharmaceuticals, Inc. Rancho Cucamonga, California
    • Amphastar France Pharmaceuticals, S.A.S. Subsidiary · France
    • Amphastar Nanjing Pharmaceuticals, Inc. Subsidiary · China
    • Amphastar UK Limited Subsidiary · United Kingdom
    • Armstrong Pharmaceuticals, Inc. Subsidiary · Massachusetts, United States
    • International Medication Systems (UK) Limited Subsidiary · United Kingdom
    • International Medication Systems, Limited Subsidiary · California, United States

Built from subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What Amphastar Pharmaceuticals, Inc. reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Property and equipment

ItemLatestA year beforeChange
Computer equipment and software$6.8M5 Dec 31, 2025$05 Dec 31, 2024
Property and equipment, before depreciation$616.8M5 Dec 31, 2025$568.9M5 Dec 31, 2024+8.4%
Accumulated depreciation$306.3M5 Dec 31, 2025$271.6M5 Dec 31, 2024+12.8%
Property and equipment, net$310.6M5 Dec 31, 2025$297.3M5 Dec 31, 2024+4.4%
Finance-lease assets$221.0K5 Dec 31, 2025$383.0K5 Dec 31, 2024−42.3%
Operating-lease assets (leased space)$42.9M5 Dec 31, 2025$46.9M5 Dec 31, 2024−8.5%

Real estate and locations

ItemLatestA year beforeChange
Area of real estate225,167 sq ft5 Jul 31, 2025

Investments

ItemLatestA year beforeChange
Cash and cash equivalents$170.2M5 Dec 31, 2025$151.6M5 Dec 31, 2024+12.2%
Marketable securities, current$112.6M5 Dec 31, 2025$70.0M5 Dec 31, 2024+60.8%
Debt securities held to maturity$96.1M5 Dec 31, 2025$54.0M5 Dec 31, 2024+78.1%
Long-term investments$11.0M5 Dec 31, 2024$14.7M9 Dec 31, 2023−25.1%

Intangibles and goodwill

ItemLatestA year beforeChange
Goodwill$3.4M5 Dec 31, 2025$3.0M5 Dec 31, 2024+11.6%
Indefinite-lived intangibles (excluding goodwill)$29.2M9 Dec 31, 2024$29.2M8 Dec 31, 20230%
Finite-lived intangibles, gross$596.3M5 Dec 31, 2025$596.3M5 Dec 31, 20240%
Accumulated amortization$63.0M5 Dec 31, 2025$37.9M5 Dec 31, 2024+66.0%
Finite-lived intangibles, net$533.3M5 Dec 31, 2025$558.4M5 Dec 31, 2024−4.5%

Inventory

ItemLatestA year beforeChange
Inventory, total$176.9M5 Dec 31, 2025$153.7M5 Dec 31, 2024+15.1%
Work in process$40.4M5 Dec 31, 2025$32.8M5 Dec 31, 2024+23.3%
Finished goods$29.6M5 Dec 31, 2025$39.4M5 Dec 31, 2024−24.9%

Properties, in its own words

Our manufacturing facilities are located in Rancho Cucamonga and South El Monte, California; Canton, Massachusetts; Éragny-sur-Epte, France; and Nanjing, China. As of December 31, 2025, we own or lease a total of 69 buildings at six locations in the U.S., France and China, that comprise 2.5 million square feet of manufacturing, research and development, distribution, packaging, laboratory, office and warehouse space. Our facilities are regularly inspected by the FDA in connection with our product approvals, and we believe that all of our facilities are being operated in material compliance with the FDA’s cGMP regulations.

The following table provides a summary of our owned properties:

The rest of Item 2

Aggregate

Facility Size

Location · (in square feet) · Primary Use

Rancho Cucamonga, CA · 267,674 · Headquarters, research and development, laboratories, manufacturing, packaging, warehousing and administrative offices

Éragny-sur-Epte, France · 251,983 · Manufacturing, laboratories, warehousing and administrative offices

Canton, MA · 216,590 · Manufacturing, packaging, warehousing, distribution and administrative offices

Nanjing, China · 1,103,737 · Manufacturing, procurement, research and development, warehousing, and administrative offices

Chino, CA · 57,968 · Research and development, and laboratories

South El Monte, CA · 21,200 · Manufacturing

The properties leased by us have expiration dates ranging from 2026 to 2035 (including certain renewal options). The following table provides a summary of our leased properties:

Aggregate

Facility Size

Location · (in square feet) · Primary Use

Rancho Cucamonga, CA · 191,180 · Warehousing, distribution and administrative offices

South El Monte, CA · 343,413 · Manufacturing, packaging, warehousing, distribution and administrative offices

We believe that our current manufacturing capacity is adequate for the near term. However, we are planning to increase capacity at our plant in Rancho Cucamonga, CA which should allow us to eventually quadruple the number of units produced at this facility. We are also increasing the capacity of our inhalation facility in Canton, MA and our insulin API production facility at ANP. We have in the past approached capacity at one of our facilities largely as a result of the FDA’s request that we reintroduce certain previously discontinued products to help cope with a nationwide shortage of these products. We believe that these capacity issues have been ameliorated as a result of certain other manufacturers re-entering the market and increasing the production of the products that were subject to the shortage.

Item 2 of the 10-K filed Feb 26, 2026.4

Leadership

Who has led Amphastar Pharmaceuticals, Inc., and when. Pick a name to see everywhere that person has worked.

Chief executive

  1. Mary Z. Luo2022–2023

Chief financial officer

  1. William J. Peters2014–now

Chief operating officer

  1. Mary Z. Luo2014–now
201520202025
Board members and other officers (20)

Subsidiaries and ownership

Subsidiaries (Exhibit 21)

  • Amphastar France Pharmaceuticals, S.A.S. France3
  • Amphastar Nanjing Pharmaceuticals, Inc. China3
  • Amphastar UK Limited United Kingdom3
  • Armstrong Pharmaceuticals, Inc. Massachusetts3
  • International Medication Systems (UK) Limited United Kingdom3
  • International Medication Systems, Limited California3

The subsidiaries the company lists in Exhibit 21 of its annual report, as filed.

Timeline

  1. Aug 6, 20268-K Results of operations37
  2. Jul 13, 20268-K Executive or director change38
  3. Jul 8, 20268-K Other events39
  4. Jun 3, 20268-K Shareholder vote40
  5. May 7, 20268-K Results of operations41
  6. Mar 16, 20268-K Other events42
  7. Mar 6, 20268-K Entered a material agreement43
  8. Mar 6, 20268-K Executive or director change44
  9. Feb 26, 20268-K Results of operations45
  10. Jan 12, 20268-K Entered a material agreement; Regulation FD disclosure46
  11. Nov 6, 20258-K Results of operations47
  12. Oct 24, 20258-K Entered a material agreement48
  13. Mar 17, 2022New chief executive Mary Z. Luo becomes CEO14

Calendar

Coming up

  1. Nov 5, 2026Reports results for the quarter ending Sep/2026 A year earlier it reported $0.83 a share, on Nov 6, 2025.49

When it reported results

  1. Aug 6, 2026Reported quarterly or annual results37
  2. May 7, 2026Reported quarterly or annual results41
  3. Feb 26, 2026Reported quarterly or annual results45
  4. Nov 6, 2025Reported quarterly or annual results47
  5. Aug 7, 2025Reported quarterly or annual results50
  6. May 7, 2025Reported quarterly or annual results51
  7. Feb 27, 2025Reported quarterly or annual results52
  8. Nov 6, 2024Reported quarterly or annual results53

Drug trials and FDA: recently

  1. Jun 22, 2026Phase 2/3 trial completed Phase 2/3 trial of I004 and NovoLog in Pharmacokinetics: primary completion Jun 22, 2026, no results posted yet (ClinicalTrials.gov NCT07560150).54
  2. Jun 16, 2026FDA approved a new use FDA approved an efficacy supplement for Rextovy (naloxone hydrochloride), a new use or patient group (NDA 208969, supplement 2).55
  3. Mar 17, 2025FDA approved a new use FDA approved an efficacy supplement for Baqsimi (glucagon), a new use or patient group (NDA 210134, supplement 4).56
  4. Jan 29, 2023Phase 2/3 trial completed Phase 2/3 trial of I004 and NovoLog in Pharmacokinetics: primary completion Jan 29, 2023, results posted Mar 5, 2026 (ClinicalTrials.gov NCT05539872).57

Upcoming dates from Nasdaq's calendar; past results from the company's 8-K filings (Item 2.02). Trials from ClinicalTrials.gov, as the sponsor registered them (expected dates are the sponsor's own and often move); approvals and advisory committee meetings from the FDA. The FDA does not publish its decision (PDUFA) dates. The full markets calendar

Filings

401 filings to the SEC since October 2021: 5 annual reports, 15 quarterly reports, 46 major events, 229 insider forms, 18 large holders, 88 other. The latest 20:

  1. Sep 23, 20264 EDGAR
  2. Sep 21, 2026144 EDGAR
  3. Sep 17, 20264 EDGAR
  4. Sep 3, 20264 EDGAR
  5. Sep 1, 2026144 EDGAR
  6. Aug 18, 2026144 EDGAR
  7. Aug 12, 20264 EDGAR
  8. Aug 11, 2026144 EDGAR
  9. Aug 11, 20264 EDGAR
  10. Aug 7, 2026144 EDGAR
  11. Aug 6, 202610-Q EDGAR
  12. Aug 6, 20268-K EDGAR
  13. Jul 14, 2026SCHEDULE 13G EDGAR
  14. Jul 13, 20264 EDGAR
  15. Jul 13, 20263 EDGAR
  16. Jul 13, 20268-K EDGAR
  17. Jul 8, 20268-K EDGAR
  18. Jun 3, 20264 EDGAR
  19. Jun 3, 20264 EDGAR
  20. Jun 3, 20264 EDGAR

The 401 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Insider trades

134 open-market trades by officers, directors and large owners since October 2021: 0 buys and 134 sales. Grants, option exercises and gifts are left out.

DateWhoTradeSharesPriceValueFiling
Sep 21, 2026PETERS WILLIAM JCFO, EVP & TREASURERSale4,139$25.00$103.5KForm 4
Sep 16, 2026Zhou RongSENIOR EVP, PRODUCTION CENTERSale10,000$23.94$239.4KForm 4
Sep 2, 2026Zhou RongSENIOR EVP, PRODUCTION CENTERSale3,187$23.63$75.3KForm 4
Aug 11, 2026PRINS RICHARD KDirectorSale7,973$20.30$161.9KForm 4
Aug 7, 2026PETERS WILLIAM JCFO, EVP & TREASURERSale8,180$22.48$183.9KForm 4
Dec 17, 2025Zhou RongSENIOR EVP, PRODUCTION CENTERSale9,787$26.20$256.4KForm 4
Dec 12, 2025Petersen Floyd F.DirectorSale2,426$25.92$62.9KForm 4
Dec 11, 2025Petersen Floyd F.DirectorSale1,737$25.69$44.6KForm 4
Nov 25, 2025PRINS RICHARD KDirectorSale4,179$27.10$113.3KForm 4
Nov 13, 2025Petersen Floyd F.DirectorSale16,679$26.49$441.8KForm 4
Nov 3, 2025Petersen Floyd F.DirectorSale500$25.27$12.6KForm 4
Oct 1, 2025Petersen Floyd F.DirectorSale500$27.20$13.6KForm 4
Sep 2, 2025Petersen Floyd F.DirectorSale500$30.98$15.5KForm 4
Aug 1, 2025Petersen Floyd F.DirectorSale500$20.83$10.4KForm 4
Jul 2, 2025Petersen Floyd F.DirectorSale500$23.47$11.7KForm 4
Jun 2, 2025Petersen Floyd F.DirectorSale500$25.67$12.8KForm 4
May 1, 2025Petersen Floyd F.DirectorSale500$24.08$12.0KForm 4
Apr 1, 2025Petersen Floyd F.DirectorSale500$28.38$14.2KForm 4
Mar 6, 2025Petersen Floyd F.DirectorSale1,000$27.99$28.0KForm 4
Mar 4, 2025PETERS WILLIAM JCFO, EVP & TREASURERSale4,231$27.54$116.5KForm 4

All 134 trades can be filtered by person here when JavaScript is on.

From Forms 4 filed with the SEC.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

Executive pay

What the company paid its top executives, from the summary compensation table in its proxy statement. Total pay includes salary, bonus, stock and option awards and other pay, as the company valued them.

YearExecutiveAgeSalaryTotal pay
2025Jack Yongfeng Zhang$950.9K$8.3M63
2025Mary Ziping Luo$775.1K$4.0M63
2025William J. Peters58$649.8K$3.2M63
2025Rong Zhou67$717.6K$2.5M63
2025Jacob Liawatidewi52$499.9K$2.0M63
2024Chief Executive Officer,$915.3K$7.7M63
2024Chief Operating OfficerChief$746.0K$3.8M63
2024Chief Financial Officer,$625.5K$2.9M63
2024Senior Executive VicePresident$564.5K$2.1M63
2024Executive VicePresident of$480.8K$1.8M63
2023PresidentChief Scientific Officer$898.0K$7.7M63
2023Scientist and Chairman$732.0K$3.8M63
2023Executive Vice President ofFinance, Treasurer, President of International Medication Systems, Limited, and Director$612.6K$2.9M63
2023of Production and President ofAmphastar Nanjing Pharmaceuticals, Co., Ltd$542.3K$2.0M63
2023Sales and Marketing, Executive Vice President of Corporate Administration Center andPresident of Amphastar France Pharmaceuticals, S.A.S.$495.5K$1.8M63

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 100. Change is in shares since the quarter before.

FundSharesValueShare of the fundChange
BlackRock, Inc.5,224,934$105.4M0.0%−196,409
Dimensional Fund Advisors LP2,305,107$46.5M0.0%+277,160
State Street Corp1,642,126$33.1M0.0%+34,611
Vanguard Capital Management LLC1,481,952$29.9M0.0%−61,703
American Century Companies Inc1,176,626$23.7M0.0%+159,088
Marshall Wace, Llp1,066,322$21.5M0.0%+40,682
Geode Capital Management, LLC969,840$19.6M0.0%−6,810
Fuller & Thaler Asset Management, Inc.949,238$19.2M0.1%−445,901
D. E. Shaw & Co., Inc.887,048$17.9M0.0%+221,506
Vanguard Portfolio Management LLC809,568$16.3M0.0%+21,752
Renaissance Technologies LLC525,100$10.6M0.0%−28,800
Goldman Sachs Group Inc505,360$10.2M0.0%+175,972
Systematic Financial Management LP437,384$8.8M0.2%−15,514
Morgan Stanley434,840$8.8M0.0%+14,503
UBS Group AG393,110$7.9M0.0%−27,153
Denali Advisors LLC375,965$7.6M0.8%+109,500
Northern Trust Corp370,991$7.5M0.0%−1,288
Bridge City Capital, LLC338,708$6.8M1.6%+3,603
Charles Schwab Investment Management Inc310,178$6.3M0.0%−10,861
Bridgeway Capital Management, LLC298,954$6.0M0.1%−31,503
Royce & Associates LP294,758$5.9M0.0%−111,417
Two Sigma Investments, LP248,115$5.0M0.0%+109,967
First Trust Advisors LP246,951$5.0M0.0%+96,360
Bank of New York Mellon Corp232,343$4.7M0.0%−10,883
Vanguard Fiduciary Trust Co224,478$4.5M0.0%−6,566

13F reports cover disclosed long positions in U.S. stocks only.

SEC filer profile

How Amphastar Pharmaceuticals, Inc. is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARAmphastar Pharmaceuticals, Inc.1
  • CIK0001297184
  • Employer ID (EIN)33-07022054
  • Filer statusLarge accelerated filer not an emerging growth company; not a smaller reporting company; not a shell company4
  • Incorporated inDelaware4
  • Fiscal year endsDecember 311
  • Industry code (SIC)2834 Pharmaceutical Preparations1
  • SEC reviewing officeOffice of Life Sciences, Division of Corporation Finance1
  • Business address11570 Sixth Street, Rancho Cucamonga, CA 917301
  • Phone909-980-94841
  • Shares outstanding42,537,944 as of Jul 31, 202611
  • Public float$632.6M as of Jun 30, 20254
  • AuditorErnst & Young LLP, Irvine, California PCAOB ID 42; it also attests to the company’s internal control over financial reporting4
  • On EDGAR sinceFeb 11, 20051
  • Filings953 in all: 4 (576), 8-K (102), 144 (65), 10-Q (37), SC 13G/A (26), 3 (20), DEFA14A (15), 10-K (12)1
    All 35 form types

    DEF 14A (12), S-8 (12), CORRESP (10), S-1/A (10), UPLOAD (9), SC 13G (6), ARS (5), EFFECT (4), 4/A (3), 8-K/A (3), CT ORDER (3), DRS/A (3), S-3 (3), SCHEDULE 13G/A (3), S-1 (2), 3/A (1), 424B4 (1), 8-A12B (1), CERTNAS (1), DRS (1), DRSLTR (1), FWP (1), PRE 14A (1), REGDEX (1), RW (1), S-1MEF (1), SCHEDULE 13G (1)

  • Latest filingsAnnual report (10-K) Feb 26, 2026
    Quarterly report (10-Q) Aug 6, 2026
    Proxy statement (DEF 14A) Apr 13, 2026
    Latest 8-K (8-K) Aug 6, 2026

Securities registered for trading

ClassSymbolExchange
Common Stock, par value $0.0001 per shareAMPHThe NASDAQ Stock Market LLC

From the cover page of the 10-K filed Feb 26, 2026 (Section 12(b) of the Exchange Act).4

Risk factors and legal proceedings

The risks Amphastar Pharmaceuticals, Inc. names in Item 1A of its 10-K filed Feb 26, 2026: 74 risks under these headings, as written.4

  • Risks Relating to our Business and Industry
  • Our success depends on our ability to develop and/or acquire and commercialize additional pharmaceutical products.
  • Our BAQSIMI®, Primatene MIST®, glucagon, epinephrine, and lidocaine products collectively represent a significant portion of our net revenues. If the sales volume or pricing of these products decline, or if we are unable to satisfy market demand for these products, they could have a material adverse effect on our business, financial position and results of operations.
  • Our ability to develop new products and additional revenue streams depends upon our ability to invest ongoing revenue, borrow funds or raise additional capital when needed.
  • Our success depends on the integrity of our supply chain, including multiple single source suppliers, and reliance on a third party for the manufacture of BAQSIMI®, the disruption of which could negatively impact our business.
  • Underutilization of our manufacturing capacity could negatively impact our gross margins.
  • We face significant competition in the pharmaceutical industry with respect to both our proprietary and generic drugs, which may result in others developing or commercializing products before or more successfully than we do, which could significantly limit our growth and materially and adversely affect our financial results.
  • Our current and future indebtedness has and may continue to adversely affect our operating results and cash flows.
  • Our outstanding loan agreements contain restrictive covenants that may limit our operating flexibility.
  • We may not have sufficient cash to settle conversions of the 2029 Convertible Notes in cash, to repurchase the 2029 Convertible Notes upon a fundamental change, or to repay the principal amount of the 2029 Convertible Notes in cash at their maturity, and our future debt may contain limitations on our ability to pay cash upon conversion or repurchase of the 2029 Convertible Notes.
  • The conditional conversion feature of the 2029 Convertible Notes, if triggered, may adversely affect our financial condition and operating results.
  • If we fail to obtain exclusive marketing rights for our generic pharmaceutical products or fail to introduce these generic products on a timely basis, our revenues, gross margin and operating results may decline significantly.
The other 63 risks
  • Our generic products face, and our generic product candidates will face, additional competitive pressures that are specific to the generic pharmaceutical industry.
  • If the market for any of our reference brand products significantly declines, sales or potential sales of our generic and biosimilar products and product candidates may suffer and our business would be materially impacted.
  • Health care providers may not be receptive to our products, particularly those that incorporate our proprietary drug delivery platforms.
  • If we are unable to maintain our group purchasing organization relationships, our revenues could decline and future profitability could be jeopardized.
  • Consolidation in the health care industry could lead to demands for price concessions or for the exclusion of some suppliers from certain of our markets, which could have an adverse effect on our business, financial condition or results of operations.
  • Sales of our products may be adversely affected by the continuing consolidation of our customer base.
  • If our business partners do not fulfill their obligations with respect to our distribution or collaboration agreements, our revenues and our business will suffer.
  • We depend upon our key personnel, the loss of whom could adversely affect our operations. If we fail to attract and retain the talent required for our business, our business could be materially harmed.
  • Our business may be adversely affected by challenging macroeconomic conditions globally.
  • We may be exposed to product liability claims and may not be able to obtain or maintain adequate product liability insurance.
  • If serious adverse events or deaths are identified relating to any of our products once they are on the market, we may be required to withdraw our products from the market, which would hinder or preclude our ability to generate revenues.
  • Any acquisitions of technologies, products and businesses may be difficult to integrate, could adversely affect our relationships with key customers and/or could result in significant charges to earnings.
  • We may engage in acquisitions or strategic partnerships that could disrupt our business, cause dilution to our stockholders, reduce our financial resources, cause or to incur debt or assume contingent liabilities, and subject us to other risks.
  • Charges to earnings resulting from acquisitions could have a material adverse effect on our business, financial position and results of operations and could cause the market value of our common stock to decline.
  • We may evaluate asset dispositions and other transactions that may impact our results of operations, and we may not achieve the expected results from these transactions.
  • Significant balances of intangible assets, including goodwill, are subject to impairment testing and may result in impairment charges, which may materially and adversely affect our results of operations and financial condition.
  • Counterfeit versions of our products could harm our patients and reputation.
  • Our business and operations have been impacted in the past, and may be impacted in the future, in the event of system breach or failure.
  • We have incurred losses in the past and we may operate at a loss in future years while continuing to invest in developing and acquiring new products.
  • Risks Relating to Regulatory Matters
  • The FDA approval process for changes to existing products (such as change of components or API supplier) is time-consuming and complicated, and we may not obtain the FDA approval required for such changes within the timeline we desire, or at all.
  • Clinical failure can occur at any stage of clinical development. The results of earlier clinical trials are not necessarily predictive of future results and any product candidate we advance through clinical trials may not have favorable results in later clinical trials or receive regulatory approval.
  • If clinical studies for our product candidates are unsuccessful or significantly delayed, we will be unable to meet our anticipated development and commercialization timelines, which would have an adverse impact on our business.
  • Even if our clinical trials and laboratory testing are completed as planned, their results may fail to provide support for approval of our products or for label claims that will make our products commercially viable.
  • The novel use of particle engineering or synthetic APIs for any of our product candidates, may not receive regulatory approval, and without regulatory approval we will not be able to market our product candidates.
  • A fast track designation by the regulatory agencies, even if granted for any of our product candidates, may not lead to a faster development or regulatory review or approval process and does not increase the likelihood that our product candidates will receive marketing approval.
  • The commercial success of our NDA product candidates will depend in significant measure on the scope of the indication(s) and claims that the FDA approves for such products.
  • Even if we are able to obtain regulatory approval for our generic products, state pharmacy boards or state agencies may conclude that our products are not substitutable at the pharmacy level for the reference listed drug. If our generic products are not substitutable at the pharmacy level for their reference listed drugs, or if our drug products do not gain the acceptance of healthcare providers, payors, and patients, this could materially reduce sales of our products and our business would suffer.
  • Our investments in biosimilar products may not result in products that are approved by the FDA or other foreign regulatory authorities and, even if approved by such authorities, may not result in commercially successful products.
  • Some of our products are used with drug delivery or companion diagnostic devices which have their own regulatory, manufacturing, reimbursement and other risks.
  • Obtaining and maintaining regulatory approval of our product candidates in one jurisdiction does not mean that we will be successful in obtaining regulatory approval of our product candidates in other jurisdictions. Failure to obtain regulatory approval in foreign jurisdictions would prevent our product candidates from being marketed abroad.
  • If branded pharmaceutical companies are successful in limiting the use of generics through their legislative, regulatory and/or other efforts, our sales of generic products may suffer.
  • Our revenues may be adversely affected if we fail to obtain insurance coverage or adequate reimbursement for our products from third-party payers and administrators.
  • We must manufacture our drug products at our facilities in conformity with cGMP regulations; failure to maintain compliance with cGMP regulations may prevent or delay the manufacture or marketing of our products or product candidates and may prevent us from gaining approval of our products.
  • Our operations are subject to environmental, health and safety and other laws and regulations, with which compliance is costly and which exposes us to penalties for non-compliance.
  • The Affordable Care Act and certain legislation and regulatory proposals may increase our costs of compliance and negatively impact our profitability over time.
  • Complying with laws in the U.S., Europe, and other jurisdictions that impose restrictive regulations addressing the collection, use, and other processing of personal information may be expensive, and failure to comply with such laws and regulations could cause substantial harm to our business.
  • Our products may be subject to federal and state laws and certain initiatives relating to cost control, which may decrease our profitability.
  • Our reporting and payment obligations under the Medicare and/or Medicaid drug rebate programs and other governmental purchasing and rebate programs are complex and may involve subjective decisions that could change as a result of new business circumstances, new regulatory guidance or advice of legal counsel. Any determination of failure to comply with those obligations could subject us to penalties and sanctions which could have a material adverse effect on our business, financial position and results of operations and the market value of our common stock could decline.
  • We may be subject to enforcement action if we engage in the off-label promotion of our products.
  • The pharmaceutical industry is highly regulated and pharmaceutical companies are subject to various federal and state fraud and abuse laws, including, without limitation, the federal Anti-Kickback Statute and the federal False Claims Act.
  • Our employees, independent contractors, consultants, commercial partners, and vendors may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements.
  • Risks Relating to our International Business
  • Because a portion of our manufacturing takes place in China, a significant disruption in the construction or operation of our manufacturing facility in China, political unrest in China, tariffs, impacts of outbreaks of health epidemics, or changes in social, political, trade, health, economic, environmental, or climate-related conditions or in laws, regulations and policies governing foreign trade could materially and adversely affect our business, financial condition and results of operations.
  • We are exposed to risks related to our international operations and failure to manage these risks may adversely affect our operating results and financial condition.
  • Adverse changes to import restrictions relating to certain animal-derived products or raw materials we use from affected countries could disrupt our supply chain and result in delays in the manufacturing of our products.
  • Enhanced trade tariffs, import restrictions, export restrictions, Chinese regulations or other trade barriers may materially harm our business.
  • We are subject to various governmental export control and trade sanctions laws and regulations that could impair our ability to compete in international markets or subject us to liability if we violate these controls.
  • The Chinese government may exert substantial influence over the manner in which we conduct our business operations in China.
  • The Chinese legal system can be uncertain and could limit the legal protections available to us.
  • Our financial performance is impacted by the financial performance of our Chinese operating subsidiary, ANP.
  • Our business may be affected by increasing sanctions and export controls targeting Russia and other responses to Russia’s invasion of Ukraine.
  • Risks Relating to our Intellectual Property
  • Our success depends on our ability to obtain, protect, and enforce our intellectual property.
  • We have in the past and in the future may become involved in patent litigations or other intellectual property proceedings relating to our future product approvals, which could result in liability for damages or delay or stop our development and commercialization efforts.
  • With respect to our proprietary products, if we fail to adequately protect or enforce our intellectual property rights, we could lose sales to generic versions of our proprietary products which could cause a material adverse effect on our business, financial position and results of operations and could cause the market value of our common stock to decline.
  • Our unpatented trade secrets, know-how, confidential and proprietary information and technology may be inadequately protected.
  • There can be no assurance of timely patent and trademark review and approval to minimize competition and generate sufficient revenues.
  • We may be subject to claims that we, our board members, employees or consultants have used or disclosed alleged trade secrets or other proprietary information belonging to third parties and any such individuals who are currently affiliated with one of our competitors may disclose our proprietary technology or information.
  • Risks Related to Ownership of our Common Stock
  • Sales of substantial amounts of our common stock, or indications of an intent to sell, may cause our stock price to decline.
  • Jack Y. Zhang and Mary Z. Luo, each of whom serves as a director and an executive officer, own a significant percentage of our stock and will be able to exert significant control over matters subject to stockholder approval.
  • We do not intend to pay dividends for the foreseeable future.
  • While we have engaged in repurchases of our common stock, any future decisions to reduce or discontinue repurchasing our common stock pursuant to our previously announced repurchase program could cause the market price for our common stock to decline.
  • Some provisions of our charter documents and Delaware law may have anti-takeover effects that could discourage an acquisition of us by others, even if an acquisition would be beneficial to our stockholders, and may prevent attempts by our stockholders to replace or remove our current management.
  • General Risk Factors
  • Global macroeconomic conditions may negatively affect us and may magnify certain risks that affect our business.
  • We could be materially and adversely affected by violations of the U.S. Foreign Corrupt Practices Act and similar worldwide anti-bribery laws.

Legal proceedings

From time to time, we may also be involved in a variety of other claims, lawsuits, investigations, and proceedings related to securities laws, product liability, patent infringement, contract disputes, employment, and other matters that arise in the normal course of our business. In addition, third parties may, from time to time, assert claims against us in the form of letters and other communications.

The results of any litigation cannot be predicted with certainty, and an unfavorable resolution in any legal proceedings could materially affect our future business, results of operations, or financial condition. Regardless of the outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of management resources, and other factors.

For information on legal proceedings, see “Part II – Item 8. Financial Statements and Supplementary Data – Notes to Consolidated Financial Statements – Note. 19 Litigation.”

The opening of Item 3, Legal Proceedings.4

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  26. 26
  27. 27
  28. 28
  29. 29
  30. 30
  31. 31
  32. 32
  33. 33
  34. 34
  35. 35
  36. 36
  37. 37
  38. 38
  39. 39
    SEC EDGAROther events
  40. 40
  41. 41
  42. 42
    SEC EDGAROther events
  43. 43
  44. 44
  45. 45
  46. 46
  47. 47
  48. 48
  49. 49
  50. 50
  51. 51
  52. 52
  53. 53
  54. 54
  55. 55
  56. 56
  57. 57
  58. 58
  59. 59
  60. 60
  61. 61
  62. 62
  63. 63