21.68
price up icon1.40%   0.30
after-market After Hours: 21.76 0.08 +0.37%
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Amphastar Pharmaceuticals Inc stock is traded at $21.68, with a volume of 389.11K. It is up +1.40% in the last 24 hours and up +19.25% over the past month. 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.
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Previous Close:
$21.38
Open:
$21.38
24h Volume:
389.11K
Relative Volume:
0.80
Market Cap:
$965.52M
Revenue:
$719.89M
Net Income/Loss:
$98.09M
P/E Ratio:
10.66
EPS:
2.0334
Net Cash Flow:
$118.98M
1W Performance:
+6.27%
1M Performance:
+19.25%
6M Performance:
-6.31%
1Y Performance:
-7.74%
1-Day Range:
Value
$21.19
$21.76
1-Week Range:
Value
$20.14
$21.76
52-Week Range:
Value
$17.03
$31.26

Amphastar Pharmaceuticals Inc Stock (AMPH) Company Profile

Name
Name
Amphastar Pharmaceuticals Inc
Name
Phone
909-980-9484
Name
Address
11570 SIXTH STREET, RANCHO CUCAMONGA, CA
Name
Employee
1,976
Name
Twitter
Name
Next Earnings Date
2024-12-06
Name
Latest SEC Filings
Name
AMPH's Discussions on Twitter

Compare AMPH vs TAK, ZTS, HLN, TEVA, UTHR

Stocks Price Market Cap Revenue Net Income Cash Flow EPS
AMPH icon
AMPH
Amphastar Pharmaceuticals Inc
21.68 952.16M 719.89M 98.09M 118.98M 2.0334
TAK icon
TAK
Takeda Pharmaceutical Co Adr
17.85 56.39B 29.85B 776.90M 4.35B 0.2408
ZTS icon
ZTS
Zoetis Inc
120.76 50.93B 9.47B 2.67B 2.28B 6.0218
HLN icon
HLN
Haleon Plc Adr
9.66 43.19B 14.54B 2.22B 2.58B 0.4871
TEVA icon
TEVA
Teva Pharmaceutical Industries Ltd Adr
31.61 36.99B 17.41B 1.43B 1.00B 1.2182
UTHR icon
UTHR
United Therapeutics Corp
577.58 25.36B 3.18B 1.33B 1.04B 27.90

Amphastar Pharmaceuticals Inc Stock (AMPH) Upgrades & Downgrades

Date Action Analyst Rating Change
Dec-09-25 Initiated Barclays Equal Weight
Aug-12-25 Upgrade Needham Hold → Buy
May-12-25 Downgrade JP Morgan Overweight → Neutral
Feb-04-25 Downgrade Piper Sandler Overweight → Neutral
Nov-22-24 Initiated Wells Fargo Equal Weight
Mar-05-24 Initiated JP Morgan Overweight
Nov-17-23 Initiated BofA Securities Neutral
Jul-25-23 Resumed Jefferies Buy
Oct-21-22 Resumed Jefferies Buy
Jul-29-22 Initiated CapitalOne Overweight
Jan-07-22 Upgrade Piper Sandler Neutral → Overweight
Jan-08-21 Downgrade Wells Fargo Overweight → Equal Weight
Oct-05-20 Upgrade Northland Capital Market Perform → Outperform
May-01-20 Initiated Northland Capital Outperform
Mar-13-19 Downgrade Needham Buy → Hold
Mar-13-19 Downgrade Piper Jaffray Overweight → Neutral
Aug-10-18 Reiterated Needham Buy
Mar-13-18 Reiterated Needham Buy
Dec-01-17 Reiterated Needham Buy
Nov-09-17 Downgrade Raymond James Outperform → Mkt Perform
Sep-27-17 Reiterated Needham Buy
Mar-14-17 Downgrade Raymond James Strong Buy → Outperform
Aug-09-16 Reiterated Needham Buy
May-10-16 Reiterated Needham Buy
Feb-19-16 Initiated Wells Fargo Outperform
Jun-19-15 Reiterated Needham Buy
Jun-03-15 Initiated Raymond James Strong Buy
Jul-21-14 Initiated Needham Buy
View All

Amphastar Pharmaceuticals Inc Stock (AMPH) Latest News

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Apr 14, 2026

Amphastar Pharmaceuticals Highlights Baqsimi Milestones, Primatene Growth at Needham Conference - MarketBeat

Apr 14, 2026
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Apr 13, 2026

Amphastar Pharmaceuticals, Inc. ($AMPH) CEO 2025 Pay Revealed - Quiver Quantitative

Apr 13, 2026
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Apr 13, 2026

Amphastar (NASDAQ: AMPH) outlines 2026 virtual meeting, director and pay votes - Stock Titan

Apr 13, 2026
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Apr 12, 2026

Do options traders know something about Amphastar Pharmaceuticals stock we don't? - MSN

Apr 12, 2026
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Apr 12, 2026

How The Story Is Shifting For Amphastar Pharmaceuticals (AMPH) After Guidance Cut And New Launches - Yahoo Finance

Apr 12, 2026
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Apr 08, 2026

AMPH Financials: Revenue Breakdown, Margins & Competitor Comparison - Intellectia AI

Apr 08, 2026
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Apr 08, 2026

Barclays Lowers Price Target for Amphastar Pharma (AMPH) | AMPH Stock News - GuruFocus

Apr 08, 2026
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Apr 08, 2026

Amphastar Pharmaceuticals (NASDAQ:AMPH) Price Target Lowered to $23.00 at Barclays - MarketBeat

Apr 08, 2026
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Apr 08, 2026

Amphastar Pharmaceuticals, Inc. (NASDAQ:AMPH) Given Average Rating of "Hold" by Brokerages - MarketBeat

Apr 08, 2026
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Apr 08, 2026

Understanding Momentum Shifts in (AMPH) - Stock Traders Daily

Apr 08, 2026
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Apr 06, 2026

Amphastar Pharmaceuticals to Present at the 25th Annual Needham Healthcare Conference - ACCESS Newswire

Apr 06, 2026
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Apr 06, 2026

Amphastar CFO, regulatory chief to present April 14; replay lasts 30 days - Stock Titan

Apr 06, 2026
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Apr 05, 2026

Amphastar Pharmaceuticals, Inc. (AMPH) stock price, news, quote and history - Yahoo Finance Australia

Apr 05, 2026
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Apr 05, 2026

Amphastar Pharmaceuticals, Inc. (AMPH) Stock Price, News, Quote & History - Yahoo! Finance Canada

Apr 05, 2026
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Apr 04, 2026

AMPH Earning Date, Earning Analysis and Earning Prediction - intellectia.ai

Apr 04, 2026
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Apr 04, 2026

SG Americas Securities LLC Makes New Investment in Amphastar Pharmaceuticals, Inc. $AMPH - MarketBeat

Apr 04, 2026
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Apr 04, 2026

Amphastar Pharma (AMPH) Stock Analysis Report | Ratings, Financials & Performance - Benzinga Japan

Apr 04, 2026
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Apr 04, 2026

Amphastar Pharmaceuticals, Inc. (AMPH) Stock Forecasts - Yahoo! Finance Canada

Apr 04, 2026
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Apr 02, 2026

Amphastar Pharmaceuticals, Inc. (AMPH) Stock forecasts - Yahoo Finance UK

Apr 02, 2026
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Apr 01, 2026

Amphastar Pharmaceuticals (NASDAQ:AMPH) Share Price Passes Below Two Hundred Day Moving AverageShould You Sell? - MarketBeat

Apr 01, 2026
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Mar 26, 2026

Vanguard reports 0 shares of Amphastar (amendment) | AMPH SEC FilingForm SCHEDULE 13G/A - Stock Titan

Mar 26, 2026
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Mar 25, 2026

Volume Recap: Is Amphastar Pharmaceuticals Inc forming a double bottom2026 Volatility Report & High Accuracy Swing Trade Signals - baoquankhu1.vn

Mar 25, 2026
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Mar 22, 2026

Portfolio Update: Is Amphastar Pharmaceuticals Inc backed by strong institutional buyingPortfolio Risk Summary & Expert Approved Momentum Trade Ideas - baoquankhu1.vn

Mar 22, 2026
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Mar 21, 2026

Aug Outlook: Can Amphastar Pharmaceuticals Inc stock outperform in a bear marketWeekly Investment Recap & AI Driven Price Forecasts - baoquankhu1.vn

Mar 21, 2026
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Mar 20, 2026

Stock Market Recap: Is Amphastar Pharmaceuticals Inc a potential multi bagger2026 Volatility Report & Fast Gaining Stock Reports - baoquankhu1.vn

Mar 20, 2026
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Mar 17, 2026

Amphastar (AMPH) EVP Yakob has 1,033 shares withheld for RSU tax - Stock Titan

Mar 17, 2026
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Mar 17, 2026

[Form 4] Amphastar Pharmaceuticals, Inc. Insider Trading Activity - Stock Titan

Mar 17, 2026
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Mar 17, 2026

Tax withholding trims Amphastar (NASDAQ: AMPH) exec's RSU shares - Stock Titan

Mar 17, 2026
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Mar 17, 2026

Tax withholding on RSU vesting for Amphastar (AMPH) CFO Peters - Stock Titan

Mar 17, 2026
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Mar 17, 2026

Discipline and Rules-Based Execution in AMPH Response - Stock Traders Daily

Mar 17, 2026
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Mar 16, 2026

NeoGenomics, Natera, and Amphastar Pharmaceuticals Shares Skyrocket, What You Need To Know - Yahoo Finance

Mar 16, 2026
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Mar 16, 2026

NeoGenomics, Natera, and Amphastar Pharmaceuticals shares skyrocket, what you need to know - MSN

Mar 16, 2026
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Mar 16, 2026

Amphastar Pharmaceuticals Inc authorizes $50 million increase to share buyback program on March 12, 2026SEC filing - marketscreener.com

Mar 16, 2026
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Mar 16, 2026

Amphastar Pharmaceuticals IncAuthorizes $50 Million Increase To Share Buyback Program On March 12, 2026SEC Filing - TradingView

Mar 16, 2026
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Mar 16, 2026

Amphastar Expands Share Repurchase Authorization to Manage Equity - TipRanks

Mar 16, 2026
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Mar 16, 2026

Amphastar Pharmaceuticals boosts buyback program by $50 million - TradingView

Mar 16, 2026
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Mar 16, 2026

Amphastar (NASDAQ: AMPH) adds $50 million to share buyback program - Stock Titan

Mar 16, 2026
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Mar 16, 2026

Clark Capital Management Group Inc. Invests $7.56 Million in Amphastar Pharmaceuticals, Inc. $AMPH - MarketBeat

Mar 16, 2026
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Mar 16, 2026

Algert Global LLC Acquires 268,612 Shares of Amphastar Pharmaceuticals, Inc. $AMPH - MarketBeat

Mar 16, 2026
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Mar 16, 2026

Amphastar Pharmaceuticals: Why I Like Bull Put Options Strategy Here (NASDAQ:AMPH) - Seeking Alpha

Mar 16, 2026
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Mar 14, 2026

Amphastar Pharmaceuticals, Inc. (NASDAQ:AMPH) Receives Average Rating of "Hold" from Analysts - MarketBeat

Mar 14, 2026
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Mar 13, 2026

Amphastar reports FDA approval for teriparatide injection - MSN

Mar 13, 2026
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Mar 13, 2026

Amphastar Pharmaceuticals, Inc. (AMPH) Presents at Barclays 28th Annual Global Healthcare ConferenceSlideshow - Seeking Alpha

Mar 13, 2026
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Mar 12, 2026

Amphastar Pharmaceuticals (NASDAQ:AMPH) Reaches New 12-Month LowShould You Sell? - MarketBeat

Mar 12, 2026
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Mar 11, 2026

Amphastar (AMPH) CFO granted RSUs, stock options and withholds shares for taxes - Stock Titan

Mar 11, 2026
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Mar 11, 2026

Risk Report: Can Amphastar Pharmaceuticals Inc maintain its current growth rateRate Hike & Daily Profit Maximizing Trade Tips - baoquankhu1.vn

Mar 11, 2026
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Mar 11, 2026

Amphastar (AMPH) exec granted RSUs, options and reports tax share withholding - Stock Titan

Mar 11, 2026
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Mar 11, 2026

Amphastar (NASDAQ: AMPH) EVP receives RSUs and stock option grant - Stock Titan

Mar 11, 2026
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Mar 11, 2026

Equity awards and tax withholding for Amphastar Pharmaceuticals (AMPH) insiders - Stock Titan

Mar 11, 2026
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Mar 10, 2026

Amphastar (AMPH) CFO Peters reports 2,146-share tax-withholding on RSU vesting - Stock Titan

Mar 10, 2026
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Mar 10, 2026

Amphastar (AMPH) CEO logs 10,850-share RSU tax withholding, retains large stake - Stock Titan

Mar 10, 2026

Amphastar Pharmaceuticals Inc Stock (AMPH) Financials Data

Revenue

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Net Income

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Cash Flow

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EPS

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Amphastar Pharmaceuticals Inc Stock (AMPH) Insider Trading

Insider Trading Relationship Date Transaction Cost #Shares Value ($) #Shares Total
Zhou Rong
SENIOR EVP, PRODUCTION CENTER
Dec 17 '25
Sale
26.20
9,787
256,379
138,043
Petersen Floyd F.
Director
Dec 12 '25
Sale
25.92
2,426
62,888
71,368
Petersen Floyd F.
Director
Dec 11 '25
Sale
25.69
1,737
44,620
73,794
RDY RDY
$12.94
price down icon 1.45%
$23.23
price down icon 3.65%
$131.44
price up icon 0.48%
RGC RGC
$29.81
price down icon 1.00%
$13.86
price down icon 0.36%
$577.58
price down icon 0.17%
Cap:     |  Volume (24h):