Amphastar Pharmaceuticals, Inc. AMPH · SEC Filings

2K

Amphastar Pharmaceuticals, Inc., established in 1996 and based in Rancho Cucamonga, California, func...

Price29.38

Market Cap1.25 B

Float31.38 M

CountryUS

SectorHealthcare

ExchangeNASDAQ

Overview Filings Insights Dilution News Transcripts

Search in Documents

Open in Studio Login

Financials

TYPE

HEADLINE

FILED AT

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Nov 5, 2026

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Aug 6, 2026

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

May 7, 2026

10-K

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]

Feb 26, 2026

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Nov 6, 2025

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Aug 7, 2025

News

TYPE

HEADLINE

FILED AT

8-K

Amphastar Pharmaceuticals Reports Third Quarter 2026 Financial Results and Announces $50 Million Share Buyback Increase

Nov 5, 2026

8-K

Amphastar Pharmaceuticals Reports Financial Results for the Second Quarter 2026

Aug 6, 2026

8-K

Amphastar Pharmaceuticals, Inc. Appoints Anthony Pierce to Board of Directors

Jul 13, 2026

8-K

Amphastar Pharmaceuticals Subsidiary Receives FDA Warning Letter

Jul 7, 2026

8-K

Amphastar Pharmaceuticals, Inc. Announces Results of 2026 Annual Meeting of Stockholders

Jun 3, 2026

8-K

Amphastar Pharmaceuticals Reports Financial Results for the First Quarter of 2026

May 7, 2026

Prospectus

TYPE

HEADLINE

FILED AT

424B4

Form 424B4 - Prospectus [Rule 424(b)(4)]

Jun 25, 2014

Registrations

TYPE

HEADLINE

FILED AT

S-8

Form S-8 - Securities to be offered to employees in employee benefit plans

Feb 29, 2024

S-8

Form S-8 - Securities to be offered to employees in employee benefit plans

Mar 1, 2023

S-8

Form S-8 - Securities to be offered to employees in employee benefit plans

Mar 11, 2022

S-3

Common Stock- EFFECTIVE

Nov 9, 2021

S-8

Form S-8 - Securities to be offered to employees in employee benefit plans

Mar 15, 2021

S-8

Form S-8 - Securities to be offered to employees in employee benefit plans

Mar 16, 2020

Proxies

TYPE

HEADLINE

FILED AT

DEFA14A

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

Apr 13, 2026

DEF 14A

Form DEF 14A - Other definitive proxy statements

Apr 13, 2026

DEFA14A

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

Apr 14, 2025

DEF 14A

Form DEF 14A - Other definitive proxy statements

Apr 14, 2025

PRE 14A

Form PRE 14A - Other preliminary proxy statements

Apr 2, 2025

DEFA14A

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

Apr 19, 2024

Ownerships

TYPE

HEADLINE

FILED AT

4

PETERS WILLIAM J (Reporting)

Nov 6, 2026

144

Form 144 - Report of proposed sale of securities

Nov 5, 2026

144

Form 144 - Report of proposed sale of securities

Nov 4, 2026

4

PETERS WILLIAM J (Reporting)

Sep 23, 2026

144

Form 144 - Report of proposed sale of securities

Sep 21, 2026

4

Zhou Rong (Reporting)

Sep 17, 2026

Other

TYPE

HEADLINE

FILED AT

EFFECT

Form EFFECT - Notice of Effectiveness

Nov 22, 2021

CORRESP

Form CORRESP - Correspondence

Nov 17, 2021

LETTER

Form UPLOAD - SEC-generated letter

Nov 15, 2021

EFFECT

Form EFFECT - Notice of Effectiveness

Nov 21, 2018

CORRESP

Form CORRESP - Correspondence

Nov 16, 2018

LETTER

Form UPLOAD - SEC-generated letter

Nov 15, 2018