GERST DIANE G.

PrivateCIK: 1611283

Location

RANCHO CUCAMONGA, CA

PRINS RICHARD K

→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

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

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

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

PETERSEN FLOYD F.

144

→AMPHASTAR PHARMACEUTICALS, INC.

Dec 11, 2025·Dec 11, 2025

-5

PETERSEN FLOYD F.

144

→AMPHASTAR PHARMACEUTICALS, INC.

Dec 10, 2025·Dec 10, 2025

-4

ZHOU RONG

144

→AMPHASTAR PHARMACEUTICALS, INC.

Nov 28, 2025·Nov 28, 2025

PRINS RICHARD K

144

→AMPHASTAR PHARMACEUTICALS, INC.

Nov 25, 2025·Nov 25, 2025

PRINS RICHARD K

→AMPHASTAR PHARMACEUTICALS, INC.

Nov 25, 2025·Nov 25, 2025

3 txn

PETERSEN FLOYD F.

→AMPHASTAR PHARMACEUTICALS, INC.

Nov 17, 2025·Nov 17, 2025

3 txn

PETERSEN FLOYD F.

144

→AMPHASTAR PHARMACEUTICALS, INC.

Nov 13, 2025·Nov 13, 2025

-4

PETERSEN FLOYD F.

→AMPHASTAR PHARMACEUTICALS, INC.

Nov 5, 2025·Nov 5, 2025

1 txn

PETERSEN FLOYD F.

144

→AMPHASTAR PHARMACEUTICALS, INC.

Nov 3, 2025·Nov 3, 2025

-4

Page 1 of 19 · 453 total

Filer	Form	Target	Filed	Activity
PRINS RICHARD KCIK · 1047579	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
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
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
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
PETERSEN FLOYD F.CIK · 1611286	144 Sale	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Dec 11, 2025 Dec 11, 2025	—
PETERSEN FLOYD F.CIK · 1611286	144 Sale	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Dec 10, 2025 Dec 10, 2025	—
ZHOU RONGCIK · 1645326	144 Sale	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Nov 28, 2025 Nov 28, 2025	—
PRINS RICHARD KCIK · 1047579	144 Sale	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Nov 25, 2025 Nov 25, 2025	—
PRINS RICHARD KCIK · 1047579	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Nov 25, 2025 Nov 25, 2025	3txn
PETERSEN FLOYD F.CIK · 1611286	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Nov 17, 2025 Nov 17, 2025	3txn
PETERSEN FLOYD F.CIK · 1611286	144 Sale	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Nov 13, 2025 Nov 13, 2025	—
PETERSEN FLOYD F.CIK · 1611286	4 Trade	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Nov 5, 2025 Nov 5, 2025	1txn
PETERSEN FLOYD F.CIK · 1611286	144 Sale	AMPHASTAR PHARMACEUTICALS, INC.CIK · 1297184	Nov 3, 2025 Nov 3, 2025	—

Page 1 of 19 · 453 total