Photronics, Inc. PLAB NASDAQ

NASDAQ Global Select • Technology • Semiconductors • US • USD

SharesGrow Score

64/100

3/7 Pass

SharesGrow Intrinsic Value

Photronics, Inc. (PLAB) has 20 known insider and institutional holders on record. The largest holder is MACRICOSTAS CONSTANTINE S with 460,895 shares. Other notable holders include MACRICOSTAS GEORGE and KIRLIN PETER S.

Over the last 12 months, insiders have made 66 transactions in PLAB stock — 20 buys (valued at $721.41K) and 34 sells (valued at $11.58M). Insider selling has exceeded buying during this period.

PLAB Insider Ownership

Top Holder

MACRICOSTAS CONSTANTINE S

460,895 shares

Buys (12 mo)

$721.41K value

Sells (12 mo)

$11.58M value

12-Month Transaction Activity

Buy 30%

Sell 52%

Top Insider Holders

#	Name	Role	Shares Owned	Last Filed	Relative Size
1	Macricostas Constantine S	Director	460,895	2026-01-07	100%
2	Macricostas George	CEO	455,262	2026-01-07	99%
3	Kirlin Peter S	Chief Executive Officer	438,571	2022-03-02	95%
4	Burr Richelle E	EVP, CAO, Gc & Secretary	269,354	2024-05-22	58%
5	Fiorita Joseph A Jr	Director	202,100	2020-02-20	44%
6	Rivera Eric	President, CFO	177,690	2026-02-11	39%
7	Progler Christopher J	EVP, Chief Technology Officer	165,591	2025-12-16	36%
8	Wang Hsueh-chun	SVP/coo Ic & Us/eu Mnstrm Ops	154,685	2026-04-03	34%
9	Jordan John P	EVP, CFO	138,756	2024-02-27	30%
10	Hsia Liang Choo	Director	90,000	2020-01-07	20%
11	Park Han Kyung	SVP & GM of Fpd Ops	81,750	2026-01-20	18%
12	Liao Daniel Jl	Director	68,782	2026-01-22	15%
13	Paladino Mary	Director	35,070	2026-01-07	8%
14	Tyson Mitchell G	Director	33,199	2026-04-03	7%
15	Zhang Rui	VP, CAO & Corporate Controller	31,920	2026-02-11	7%
16	Lewis Adam M	Director	31,070	2026-01-07	7%
17	Jeong Soo Hong	President and COO Asia	30,000	2014-12-23	7%
18	Alesio Todd Anthony	SVP, CAO	16,963	2026-02-11	4%
19	Smith Sean T	Officer	12,500	2017-12-05	3%
20	Garcia David A.	Director	11,470	2026-01-07	2%

Recent Transactions (last 12 months)

Date	Name	Role	Type	Shares	Price	Value
2026-04-01	Wang Hsueh-chun	SVP/coo Ic & Us/eu Mnstrm Ops	Informative Sell	1,714	$42.15	$72.25K
2026-04-01	Lee Kang Jyh	Director	Option Exercise (Sell)	5,000	$10.75	$53.75K
2026-04-01	Tyson Mitchell G	Director	Informative Sell	10,000	$42.31	$423.1K
2026-03-26	Lee Kang Jyh	Director	Option Exercise (Sell)	5,000	$10.75	$53.75K
2026-03-23	Lee Kang Jyh	Director	Informative Sell	10,000	$39.00	$390K
2026-03-19	Lee Kang Jyh	Director	Informative Sell	10,000	$35.80	$358K
2026-02-09	Zhang Rui	VP, CAO & Corporate Controller	RSU Award	1,467	-	-
2026-01-12	Zhang Rui	VP, CAO & Corporate Controller	Unknown	-	-	-
2026-02-09	Alesio Todd Anthony	SVP, CAO	RSU Award	983	-	-
2026-01-12	Alesio Todd Anthony	SVP, CAO	Unknown	-	-	-
2026-02-09	Rivera Eric	President, CFO	RSU Award	22,641	-	-
2026-01-12	Zhang Rui	VP, CAO & Corporate Controller	Unknown	-	-	-
2026-01-12	Alesio Todd Anthony	SVP, CAO	Unknown	-	-	-
2026-01-20	Almeida Michelle	Director	RSU Award	1,234	-	-
2026-01-20	Liao Daniel Jl	Director	RSU Award	1,234	-	-
2026-01-16	Park Han Kyung	SVP & GM of Fpd Ops	Informative Sell	6,250	$34.89	$218.06K
2026-01-13	Park Han Kyung	SVP & GM of Fpd Ops	Informative Sell	7,500	$33.70	$252.75K
2026-01-16	Lee Kang Jyh	Director	Informative Sell	10,000	$34.51	$345.1K
2026-01-15	Lee Kang Jyh	Director	Informative Sell	10,000	$34.13	$341.3K
2026-01-13	Lee Kang Jyh	Director	Informative Sell	10,000	$34.42	$344.2K
2026-01-01	Almeida Michelle	Director	Unknown	-	-	-
2026-01-12	Lee Kang Jyh	Director	Informative Sell	10,000	$33.05	$330.5K
2026-01-07	Lee Kang Jyh	Director	Informative Sell	10,000	$34.83	$348.3K
2026-01-03	Garcia David A.	Director	RSU Award	1,272	-	-
2026-01-03	Wang Hsueh-chun	SVP/coo Ic & Us/eu Mnstrm Ops	RSU Award	28,435	-	-