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$AMPH

$18.71 -$0.01 (0.05%)

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Insider Transactions

Insider Transaction Summary

Physics & Chemistry Laboratories, Inc. Applied

7,461,594 shares

Net: 0 B/S: -

Physics Chemistry Laboratories, Inc. Applied

7,327,679 shares

Net: 0 B/S: -

Jack Y. Zhang

6,827,679 shares

Net: 0 B/S: -

Mary Z. Luo

2,990,052 shares

Net: +142,393 B/S: ∞

Richard Koo

259,289 shares

Net: 0 B/S: -

Jason B. Shandell

179,276 shares

Net: 0 B/S: -

WILLIAM J PETERS

175,063 shares

Net: +49,533 B/S: ∞

Rong Zhou

171,554 shares

Net: +33,511 B/S: 5.03

Howard Lee

159,350 shares

Net: +7,374 B/S: ∞

Yakob Liawatidewi

121,892 shares

Net: +30,438 B/S: ∞

Floyd F. Petersen

71,368 shares

Net: -6,163 B/S: 0.73

MICHAEL A ZASLOFF

37,667 shares

Net: +8,143 B/S: ∞

RICHARD K PRINS

37,598 shares

Net: +8,143 B/S: 2.95

Diane G. Gerst

31,899 shares

Net: +8,143 B/S: ∞

Stephen B. Shohet

30,706 shares

Net: 0 B/S: -

David Maris

19,170 shares

Net: 0 B/S: -

Gayle Deflin

19,057 shares

Net: +8,143 B/S: ∞

David Russell Gaugh

14,447 shares

Net: +14,447 B/S: ∞

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
Physics & Chemistry Laboratories, Inc. Applied	7,461,594	0	-
Physics Chemistry Laboratories, Inc. Applied	7,327,679	0	-
Jack Y. Zhang	6,827,679	0	-
Mary Z. Luo	2,990,052	+142,393	∞
Richard Koo	259,289	0	-
Jason B. Shandell	179,276	0	-
WILLIAM J PETERS	175,063	+49,533	∞
Rong Zhou	171,554	+33,511	5.03
Howard Lee	159,350	+7,374	∞
Yakob Liawatidewi	121,892	+30,438	∞
Floyd F. Petersen	71,368	-6,163	0.73
MICHAEL A ZASLOFF	37,667	+8,143	∞
RICHARD K PRINS	37,598	+8,143	2.95
Diane G. Gerst	31,899	+8,143	∞
Stephen B. Shohet	30,706	0	-
David Maris	19,170	0	-
Gayle Deflin	19,057	+8,143	∞
David Russell Gaugh	14,447	+14,447	∞

Individual Transactions

June 02, 2026

Howard Lee

Tax Payment

Change: -769

Price: $18.45

Shares: 159,350

Value: -$14,188

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Howard Lee	Jun 03	Tax Payment (F) Tax Payment	159,350	-769	$18.45	-$14,188

June 01, 2026

MICHAEL A ZASLOFF

Grant/Award Acquisition

Change: +8,143

Price: $0.00

Shares: 37,667

Value: +$0

RICHARD K PRINS

Grant/Award Acquisition

Change: +8,143

Price: $0.00

Shares: 37,598

Value: +$0

Howard Lee

Grant/Award Acquisition

Change: +8,143

Price: $0.00

Shares: 160,119

Value: +$0

Diane G. Gerst

Grant/Award Acquisition

Change: +8,143

Price: $0.00

Shares: 31,899

Value: +$0

Gayle Deflin

Grant/Award Acquisition

Change: +8,143

Price: $0.00

Shares: 19,057

Value: +$0

David Russell Gaugh

Grant/Award Acquisition

Change: +8,143

Price: $0.00

Shares: 14,447

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
MICHAEL A ZASLOFF	Jun 03	Grant/Award Acquisition (A) Compensation/Award	37,667	+8,143	$0.00	+$0
RICHARD K PRINS	Jun 03	Grant/Award Acquisition (A) Compensation/Award	37,598	+8,143	$0.00	+$0
Howard Lee	Jun 03	Grant/Award Acquisition (A) Compensation/Award	160,119	+8,143	$0.00	+$0
Diane G. Gerst	Jun 03	Grant/Award Acquisition (A) Compensation/Award	31,899	+8,143	$0.00	+$0
Gayle Deflin	Jun 03	Grant/Award Acquisition (A) Compensation/Award	19,057	+8,143	$0.00	+$0
David Russell Gaugh	Jun 03	Grant/Award Acquisition (A) Compensation/Award	14,447	+8,143	$0.00	+$0

March 15, 2026

Yakob Liawatidewi

Tax Payment

Change: -1,033

Price: $18.18

Shares: 121,892

Value: -$18,779

Rong Zhou

Tax Payment

Change: -1,225

Price: $18.18

Shares: 171,554

Value: -$22,270

Mary Z. Luo

Tax Payment

Change: -9,784

Price: $18.18

Shares: 2,990,052

Value: -$177,873

WILLIAM J PETERS

Tax Payment

Change: -1,973

Price: $18.18

Shares: 175,063

Value: -$35,869

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Yakob Liawatidewi	Mar 17	Tax Payment (F) Tax Payment	121,892	-1,033	$18.18	-$18,779
Rong Zhou	Mar 17	Tax Payment (F) Tax Payment	171,554	-1,225	$18.18	-$22,270
Mary Z. Luo	Mar 17	Tax Payment (F) Tax Payment	2,990,052	-9,784	$18.18	-$177,873
WILLIAM J PETERS	Mar 17	Tax Payment (F) Tax Payment	175,063	-1,973	$18.18	-$35,869

March 10, 2026

Yakob Liawatidewi

Tax Payment

Change: -1,870

Price: $18.91

Shares: 122,925

Value: -$35,361

Rong Zhou

Tax Payment

Change: -2,215

Price: $18.91

Shares: 172,779

Value: -$41,885

Mary Z. Luo

Tax Payment

Change: -14,785

Price: $18.91

Shares: 2,999,836

Value: -$279,584

WILLIAM J PETERS

Tax Payment

Change: -3,297

Price: $18.91

Shares: 177,036

Value: -$62,346

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Yakob Liawatidewi	Mar 11	Tax Payment (F) Tax Payment	122,925	-1,870	$18.91	-$35,361
Rong Zhou	Mar 11	Tax Payment (F) Tax Payment	172,779	-2,215	$18.91	-$41,885
Mary Z. Luo	Mar 11	Tax Payment (F) Tax Payment	2,999,836	-14,785	$18.91	-$279,584
WILLIAM J PETERS	Mar 11	Tax Payment (F) Tax Payment	177,036	-3,297	$18.91	-$62,346

March 09, 2026

Yakob Liawatidewi

Grant/Award Acquisition

Change: +35,450

Price: $0.00

Shares: 124,795

Value: +$0

Rong Zhou

Grant/Award Acquisition

Change: +39,432

Price: $0.00

Shares: 174,994

Value: +$0

Mary Z. Luo

Grant/Award Acquisition

Change: +180,504

Price: $0.00

Shares: 3,014,621

Value: +$0

WILLIAM J PETERS

Grant/Award Acquisition

Change: +58,693

Price: $0.00

Shares: 180,333

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Yakob Liawatidewi	Mar 11	Grant/Award Acquisition (A) Compensation/Award	124,795	+35,450	$0.00	+$0
Rong Zhou	Mar 11	Grant/Award Acquisition (A) Compensation/Award	174,994	+39,432	$0.00	+$0
Mary Z. Luo	Mar 11	Grant/Award Acquisition (A) Compensation/Award	3,014,621	+180,504	$0.00	+$0
WILLIAM J PETERS	Mar 11	Grant/Award Acquisition (A) Compensation/Award	180,333	+58,693	$0.00	+$0

March 06, 2026

Yakob Liawatidewi

Tax Payment

Change: -1,144

Price: $19.34

Shares: 89,345

Value: -$22,124

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Yakob Liawatidewi	Mar 10	Tax Payment (F) Tax Payment	89,345	-1,144	$19.34	-$22,124