Stocks · Health care · Pharmaceutical Preparations

Amphastar Pharmaceuticals, Inc.

AMPH Clue Score64
United States Fiscal year ends December CIK 0001297184
26.62
+3.14%
Close, 9 Oct 2026 · USD

Price, with every insider trade on it

Closing prices, 12 months · point at a dot for who traded, or at the line for the close
26.62 on 9 Oct 2026
29 23 17 Oct 2025 Apr 2026 Oct 2026 13 Oct 2025 $23.51 14 Oct 2025 $23.86 15 Oct 2025 $23.14 16 Oct 2025 $23.22 17 Oct 2025 $23.78 20 Oct 2025 $23.73 21 Oct 2025 $24.26 22 Oct 2025 $24.52 23 Oct 2025 $24.72 24 Oct 2025 $24.52 27 Oct 2025 $24.04 28 Oct 2025 $24.18 29 Oct 2025 $24.24 30 Oct 2025 $24.66 31 Oct 2025 $25.50 3 Nov 2025 $25.30 4 Nov 2025 $25.26 5 Nov 2025 $25.31 6 Nov 2025 $24.23 7 Nov 2025 $24.03 10 Nov 2025 $26.12 11 Nov 2025 $27.16 12 Nov 2025 $27.83 13 Nov 2025 $26.37 14 Nov 2025 $26.06 17 Nov 2025 $26.02 18 Nov 2025 $25.90 19 Nov 2025 $25.37 20 Nov 2025 $25.36 21 Nov 2025 $26.01 24 Nov 2025 $26.71 25 Nov 2025 $27.69 26 Nov 2025 $27.36 28 Nov 2025 $27.70 1 Dec 2025 $27.45 2 Dec 2025 $26.67 3 Dec 2025 $27.58 4 Dec 2025 $27.15 5 Dec 2025 $26.77 8 Dec 2025 $26.01 9 Dec 2025 $25.65 10 Dec 2025 $25.71 11 Dec 2025 $25.90 12 Dec 2025 $25.27 15 Dec 2025 $26.31 16 Dec 2025 $25.61 17 Dec 2025 $26.07 18 Dec 2025 $26.50 19 Dec 2025 $26.60 22 Dec 2025 $27.32 23 Dec 2025 $26.45 24 Dec 2025 $26.81 26 Dec 2025 $27.12 29 Dec 2025 $26.79 30 Dec 2025 $27.00 31 Dec 2025 $26.78 2 Jan 2026 $26.46 5 Jan 2026 $26.72 6 Jan 2026 $27.62 7 Jan 2026 $27.33 8 Jan 2026 $27.74 9 Jan 2026 $27.74 12 Jan 2026 $29.40 13 Jan 2026 $28.91 14 Jan 2026 $27.76 15 Jan 2026 $26.00 16 Jan 2026 $26.07 20 Jan 2026 $25.95 21 Jan 2026 $26.22 22 Jan 2026 $26.15 23 Jan 2026 $25.92 26 Jan 2026 $26.60 27 Jan 2026 $26.25 28 Jan 2026 $26.12 29 Jan 2026 $26.15 30 Jan 2026 $26.49 2 Feb 2026 $27.92 3 Feb 2026 $28.24 4 Feb 2026 $28.61 5 Feb 2026 $28.63 6 Feb 2026 $29.26 9 Feb 2026 $28.61 10 Feb 2026 $28.57 11 Feb 2026 $28.59 12 Feb 2026 $27.55 13 Feb 2026 $28.50 17 Feb 2026 $28.45 18 Feb 2026 $28.66 19 Feb 2026 $28.54 20 Feb 2026 $28.53 23 Feb 2026 $27.55 24 Feb 2026 $27.67 25 Feb 2026 $27.97 26 Feb 2026 $26.49 27 Feb 2026 $20.23 2 Mar 2026 $21.01 3 Mar 2026 $19.83 4 Mar 2026 $19.96 5 Mar 2026 $20.44 6 Mar 2026 $19.34 9 Mar 2026 $19.21 10 Mar 2026 $18.91 11 Mar 2026 $18.77 12 Mar 2026 $18.18 13 Mar 2026 $18.18 16 Mar 2026 $19.41 17 Mar 2026 $19.51 18 Mar 2026 $19.00 19 Mar 2026 $19.54 20 Mar 2026 $19.50 23 Mar 2026 $19.23 24 Mar 2026 $19.23 25 Mar 2026 $19.57 26 Mar 2026 $19.53 27 Mar 2026 $19.01 30 Mar 2026 $19.22 31 Mar 2026 $19.59 1 Apr 2026 $20.24 2 Apr 2026 $20.45 6 Apr 2026 $20.58 7 Apr 2026 $20.58 8 Apr 2026 $20.40 9 Apr 2026 $20.87 10 Apr 2026 $20.37 13 Apr 2026 $21.36 14 Apr 2026 $21.38 15 Apr 2026 $21.68 16 Apr 2026 $21.81 17 Apr 2026 $22.88 20 Apr 2026 $22.92 21 Apr 2026 $21.21 22 Apr 2026 $20.99 23 Apr 2026 $21.01 24 Apr 2026 $21.41 27 Apr 2026 $21.65 28 Apr 2026 $21.82 29 Apr 2026 $21.63 30 Apr 2026 $21.96 1 May 2026 $21.88 4 May 2026 $22.74 5 May 2026 $23.39 6 May 2026 $23.90 7 May 2026 $24.03 8 May 2026 $19.00 11 May 2026 $18.45 12 May 2026 $17.50 13 May 2026 $18.32 14 May 2026 $17.30 15 May 2026 $16.87 18 May 2026 $17.20 19 May 2026 $17.82 20 May 2026 $18.08 21 May 2026 $18.16 22 May 2026 $18.41 26 May 2026 $18.81 27 May 2026 $19.10 28 May 2026 $19.30 29 May 2026 $18.85 1 Jun 2026 $18.42 2 Jun 2026 $18.45 3 Jun 2026 $18.12 4 Jun 2026 $18.70 5 Jun 2026 $19.74 8 Jun 2026 $19.39 9 Jun 2026 $20.16 10 Jun 2026 $20.29 11 Jun 2026 $20.53 12 Jun 2026 $20.09 15 Jun 2026 $19.71 16 Jun 2026 $19.96 17 Jun 2026 $19.41 18 Jun 2026 $18.81 22 Jun 2026 $18.33 23 Jun 2026 $19.53 24 Jun 2026 $21.02 25 Jun 2026 $21.04 26 Jun 2026 $21.78 29 Jun 2026 $20.71 30 Jun 2026 $20.18 1 Jul 2026 $20.10 2 Jul 2026 $19.64 6 Jul 2026 $19.61 7 Jul 2026 $20.08 8 Jul 2026 $18.88 9 Jul 2026 $19.02 10 Jul 2026 $18.72 13 Jul 2026 $19.29 14 Jul 2026 $18.81 15 Jul 2026 $19.40 16 Jul 2026 $19.86 17 Jul 2026 $19.75 20 Jul 2026 $19.63 21 Jul 2026 $19.59 22 Jul 2026 $19.30 23 Jul 2026 $18.87 24 Jul 2026 $18.72 27 Jul 2026 $19.18 28 Jul 2026 $20.15 29 Jul 2026 $20.58 30 Jul 2026 $20.38 31 Jul 2026 $19.94 3 Aug 2026 $20.22 4 Aug 2026 $19.90 5 Aug 2026 $20.24 6 Aug 2026 $19.81 7 Aug 2026 $20.78 10 Aug 2026 $20.31 11 Aug 2026 $20.42 12 Aug 2026 $19.98 13 Aug 2026 $20.18 14 Aug 2026 $20.91 17 Aug 2026 $20.86 18 Aug 2026 $21.34 19 Aug 2026 $21.74 20 Aug 2026 $21.68 21 Aug 2026 $21.60 24 Aug 2026 $21.52 25 Aug 2026 $21.98 26 Aug 2026 $22.02 27 Aug 2026 $21.88 28 Aug 2026 $22.01 31 Aug 2026 $22.53 1 Sep 2026 $22.96 2 Sep 2026 $23.74 3 Sep 2026 $23.84 4 Sep 2026 $23.18 8 Sep 2026 $22.93 9 Sep 2026 $23.04 10 Sep 2026 $23.54 11 Sep 2026 $23.78 14 Sep 2026 $23.91 15 Sep 2026 $23.64 16 Sep 2026 $23.95 17 Sep 2026 $23.82 18 Sep 2026 $23.62 21 Sep 2026 $24.48 22 Sep 2026 $24.32 23 Sep 2026 $24.96 24 Sep 2026 $26.27 25 Sep 2026 $26.13 28 Sep 2026 $27.39 29 Sep 2026 $26.68 30 Sep 2026 $25.81 1 Oct 2026 $25.35 2 Oct 2026 $25.43 5 Oct 2026 $25.37 6 Oct 2026 $25.91 7 Oct 2026 $25.54 8 Oct 2026 $25.81 9 Oct 2026 $26.62 Petersen Floyd F. Director Sold on a plan $12.63K 3 Nov 2025 · at $25.27 · 0.7% of stake Petersen Floyd F. Director Sold at will $441.84K 13 Nov 2025 · at $26.49 · 18.1% of stake PRINS RICHARD K Director Sold at will $113.25K 25 Nov 2025 · at $27.10 · 10.6% of stake Petersen Floyd F. Director Sold at will $44.62K 11 Dec 2025 · at $25.69 · 2.3% of stake Petersen Floyd F. Director Sold at will $62.89K 12 Dec 2025 · at $25.92 · 3.3% of stake Zhou Rong SENIOR EVP, PRODUCTION CENTER Sold at will $256.38K 17 Dec 2025 · at $26.20 · 6.6% of stake PETERS WILLIAM J CFO, EVP & TREASURER Sold on a plan $183.89K 7 Aug 2026 · at $22.48 · 4.5% of stake PRINS RICHARD K Director Sold at will $161.85K 11 Aug 2026 · at $20.30 · 21.2% of stake Zhou Rong SENIOR EVP, PRODUCTION CENTER Sold at will $75.31K 2 Sep 2026 · at $23.63 · 1.8% of stake Zhou Rong SENIOR EVP, PRODUCTION CENTER Sold at will $239.40K 16 Sep 2026 · at $23.94 · 5.6% of stake PETERS WILLIAM J CFO, EVP & TREASURER Sold on a plan $103.48K 21 Sep 2026 · at $25.00 · 2.4% of stake
0 buys8 sales at will3 planned sales

Key numbers

Fiscal year 2025, ended 31 Dec 2025, as filed
Revenue
$719.89M
Net income
$98.09M
Free cash flow
$121.23M
Gross margin
49.5%
Operating margin
19.5%
Net margin
13.6%
Return on equity
12.4%
Return on capital
7.9%
Debt to equity
0.79
Revenue growth, 1 yr
-1.7%
Revenue growth, 5 yr
15.5% a year
EPS growth, 1 yr
-33.7%

Revenue and net income

Fiscal years, as filed with the SEC · point at a year for the detail
350M 1M FY20 Fiscal year 2020 Revenue $349.85M Net income $1.40M Margin 0.4% 438M 62M FY21 Fiscal year 2021 Revenue $437.77M Net income $62.12M Margin 14.2% · growth +25.1% 499M 91M FY22 Fiscal year 2022 Revenue $498.99M Net income $91.39M Margin 18.3% · growth +14.0% 644M 138M FY23 Fiscal year 2023 Revenue $644.40M Net income $137.55M Margin 21.3% · growth +29.1% 732M 160M FY24 Fiscal year 2024 Revenue $731.97M Net income $159.52M Margin 21.8% · growth +13.6% 720M 98M FY25 Fiscal year 2025 Revenue $719.89M Net income $98.09M Margin 13.6% · growth -1.7%
RevenueNet incomeLoss

Latest insider transactions

From Form 4, most recent first
All of them →
DateInsiderTypeValueOf own stake
21 Sep 2026 PETERS WILLIAM J
CFO, EVP & TREASURER
Sold on a plan $103.48K 2.4%
16 Sep 2026 Zhou Rong
SENIOR EVP, PRODUCTION CENTER
Sold at will $239.40K 5.6%
2 Sep 2026 Zhou Rong
SENIOR EVP, PRODUCTION CENTER
Sold at will $75.31K 1.8%
11 Aug 2026 PRINS RICHARD K
Director
Sold at will $161.85K 21.2%
7 Aug 2026 PETERS WILLIAM J
CFO, EVP & TREASURER
Sold on a plan $183.89K 4.5%
17 Dec 2025 Zhou Rong
SENIOR EVP, PRODUCTION CENTER
Sold at will $256.38K 6.6%