Filing analysis / Ownership / Amphastar Pharmaceuticals, Inc.

Top 10 companies

AMPH Amphastar Pharmaceuticals		589
Peters William J		84
Floyd F. Petersen		79
Jack Y. Zhang		63
Zhou Rong		59
Luo Mary Z.		56
Liawatidewi Yakob		51
Prins Richard K		49
Shandell Jason B.		42
Gerst Diane G.		35

Relative stock performance:

1M 3M 6M 1Y

Search information

Ownership

Filing Types

Amphastar Pharmaceuticals, Inc.

Companies

SEC filings

Source

By filing date (month)

Jan 2015

Jan 2025

By filing type

4		505
144		45
SC 13G/A		27
3		5
4/A		3
SC 13G		3
3/A		1

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