AMPHASTAR PHARMACEUTICALS, INC.

PublicCIK: 1297184

AMPHNASDAQ

Location

RANCHO CUCAMONGA, CA

PIERCE ANTHONY T

→AMPHASTAR PHARMACEUTICALS, INC.

Jul 13, 2026·3d ago

2 txn

PRINS RICHARD K

→AMPHASTAR PHARMACEUTICALS, INC.

Jun 4, 2026·Jun 4, 2026

3 txn

LEE HOWARD

→AMPHASTAR PHARMACEUTICALS, INC.

Jun 4, 2026·Jun 4, 2026

3 txn

ZASLOFF MICHAEL A

→AMPHASTAR PHARMACEUTICALS, INC.

Jun 4, 2026·Jun 4, 2026

2 txn

GERST DIANE G.

→AMPHASTAR PHARMACEUTICALS, INC.

Jun 4, 2026·Jun 4, 2026

2 txn

GAUGH DAVID RUSSELL

→AMPHASTAR PHARMACEUTICALS, INC.

Jun 4, 2026·Jun 4, 2026

2 txn

DEFLIN GAYLE

→AMPHASTAR PHARMACEUTICALS, INC.

Jun 4, 2026·Jun 4, 2026

2 txn

ZHOU RONG

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 17, 2026·Mar 17, 2026

3 txn

PETERS WILLIAM J

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 17, 2026·Mar 17, 2026

1 txn

ZHANG JACK Y.

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 17, 2026·Mar 17, 2026

3 txn

LIAWATIDEWI YAKOB

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 17, 2026·Mar 17, 2026

2 txn

PETERS WILLIAM J

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 11, 2026·Mar 11, 2026

3 txn

ZHOU RONG

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 11, 2026·Mar 11, 2026

5 txn

LIAWATIDEWI YAKOB

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 11, 2026·Mar 11, 2026

4 txn

ZHANG JACK Y.

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 11, 2026·Mar 11, 2026

7 txn

LIAWATIDEWI YAKOB

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 10, 2026·Mar 10, 2026

2 txn

ZHANG JACK Y.

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 10, 2026·Mar 10, 2026

3 txn

PETERS WILLIAM J

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 10, 2026·Mar 10, 2026

1 txn

ZHOU RONG

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 10, 2026·Mar 10, 2026

3 txn

ZHANG JACK Y.

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 7, 2026·Mar 7, 2026

3 txn

ZHOU RONG

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 7, 2026·Mar 7, 2026

3 txn

LIAWATIDEWI YAKOB

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 7, 2026·Mar 7, 2026

2 txn

PETERS WILLIAM J

→AMPHASTAR PHARMACEUTICALS, INC.

Mar 7, 2026·Mar 7, 2026

1 txn

ZHOU RONG

→AMPHASTAR PHARMACEUTICALS, INC.

Dec 18, 2025·Dec 18, 2025

5 txn

PETERSEN FLOYD F.

→AMPHASTAR PHARMACEUTICALS, INC.

Dec 15, 2025·Dec 15, 2025

2 txn

Page 1 of 19 · 462 total

Filer	Form	Target	Filed	Activity
PIERCE ANTHONY TCIK · 2141303	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Jul 13, 2026 3d ago	2txn
PRINS RICHARD KCIK · 1047579	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Jun 4, 2026 Jun 4, 2026	3txn
LEE HOWARDCIK · 1379941	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Jun 4, 2026 Jun 4, 2026	3txn
ZASLOFF MICHAEL ACIK · 1033511	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Jun 4, 2026 Jun 4, 2026	2txn
GERST DIANE G.CIK · 1611283	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Jun 4, 2026 Jun 4, 2026	2txn
GAUGH DAVID RUSSELLCIK · 2075974	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Jun 4, 2026 Jun 4, 2026	2txn
DEFLIN GAYLECIK · 1866024	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Jun 4, 2026 Jun 4, 2026	2txn
ZHOU RONGCIK · 1645326	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 17, 2026 Mar 17, 2026	3txn
PETERS WILLIAM JCIK · 1263136	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 17, 2026 Mar 17, 2026	1txn
ZHANG JACK Y.CIK · 1611157	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 17, 2026 Mar 17, 2026	3txn
LIAWATIDEWI YAKOBCIK · 1743927	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 17, 2026 Mar 17, 2026	2txn
PETERS WILLIAM JCIK · 1263136	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 11, 2026 Mar 11, 2026	3txn
ZHOU RONGCIK · 1645326	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 11, 2026 Mar 11, 2026	5txn
LIAWATIDEWI YAKOBCIK · 1743927	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 11, 2026 Mar 11, 2026	4txn
ZHANG JACK Y.CIK · 1611157	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 11, 2026 Mar 11, 2026	7txn
LIAWATIDEWI YAKOBCIK · 1743927	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 10, 2026 Mar 10, 2026	2txn
ZHANG JACK Y.CIK · 1611157	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 10, 2026 Mar 10, 2026	3txn
PETERS WILLIAM JCIK · 1263136	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 10, 2026 Mar 10, 2026	1txn
ZHOU RONGCIK · 1645326	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 10, 2026 Mar 10, 2026	3txn
ZHANG JACK Y.CIK · 1611157	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 7, 2026 Mar 7, 2026	3txn
ZHOU RONGCIK · 1645326	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 7, 2026 Mar 7, 2026	3txn
LIAWATIDEWI YAKOBCIK · 1743927	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 7, 2026 Mar 7, 2026	2txn
PETERS WILLIAM JCIK · 1263136	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Mar 7, 2026 Mar 7, 2026	1txn
ZHOU RONGCIK · 1645326	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Dec 18, 2025 Dec 18, 2025	5txn
PETERSEN FLOYD F.CIK · 1611286	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Dec 15, 2025 Dec 15, 2025	2txn

Page 1 of 19 · 462 total