Amphastar Pharmaceuticals, Inc. reports

Company location: Rancho Cucamonga, CA
Fiscal year end: 31 December

Amphastar Pharmaceuticals, Inc. has filed 948 SEC EDGAR filings since 11 Feb 2005

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SEC filing history

Showing 351-375 of 939 matching filings.

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25

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15

4

OWNERSHIP DOCUMENT

Filing date: 03 May 2022
Reporting date: 02 May 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-36509

8-K

Filing date: 22 Apr 2022
Reporting date: 19 Apr 2022
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

DEFA14A File 001-36509

DEFA14A

Filing date: 14 Apr 2022
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

DEF 14A File 001-36509

DEF 14A

Filing date: 14 Apr 2022
Reporting date: 10 Jun 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 04 Apr 2022
Reporting date: 01 Apr 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 18 Mar 2022
Reporting date: 16 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 18 Mar 2022
Reporting date: 16 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 18 Mar 2022
Reporting date: 16 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 18 Mar 2022
Reporting date: 16 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 17 Mar 2022
Reporting date: 15 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 17 Mar 2022
Reporting date: 15 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 17 Mar 2022
Reporting date: 16 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 17 Mar 2022
Reporting date: 15 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 17 Mar 2022
Reporting date: 15 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 17 Mar 2022
Reporting date: 15 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

S-8 File 333-263491

S-8

Filing date: 11 Mar 2022
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

10-K File 001-36509

10-K

Filing date: 11 Mar 2022
Reporting date: 31 Dec 2021
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

8-K File 001-36509

8-K

Filing date: 10 Mar 2022
Reporting date: 10 Mar 2022
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 09 Mar 2022
Reporting date: 07 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 01 Mar 2022
Reporting date: 01 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 01 Mar 2022
Reporting date: 25 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 01 Mar 2022
Reporting date: 25 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

SC 13G/A File 005-88204

SC 13G/A filing

Filing date: 14 Feb 2022
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

SC 13G/A File 005-88204

SC 13G/A

Filing date: 11 Feb 2022
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 09 Feb 2022
Reporting date: 08 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

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