Photronics PLAB Insider Ownership

NASDAQ PLAB

$28.62 +0.27 (+0.95%)

At close: Oct 20, 2026 · 4:00 PM EDT

Insider Holdings by Owner

4.19Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

3.06%

▼-0.050% pp QoQ

Shares Held by Insiders

1.78Mn

filed for Sep 2026

▼-1.55% QoQ

Shares Outstanding

58.20Mn

58,195,000 shares

Direct Holdings

1.78Mn

Indirect: 0

Net Shares Traded (QoQ)

-28.00K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past year, PLAB insiders sold $24.17 million of stock (609.39K shares) on the open market and bought none.

Counted by insider, open-market selling of PLAB stock in the past 12 months came from 10 insiders, with no insider buying.
Kang Jyh Lee (Director) was the top open-market seller of Photronics over the past 12 months, with $8.72 million sold (235K shares) and the latest sale on September 29, 2026.
Apart from open-market trades, PLAB insiders received 301.54K shares in stock awards, acquired 51K shares through option exercises and conversions, gave up 3.29K shares to cover taxes or exercise prices and gave away 50K shares as gifts in the past 12 months.
According to Business Quant data, insiders at Photronics reported 1.78Mn shares in total in their latest Form 4 filings, down 1.73% from 1.81Mn shares at the end of Q2 2026.
PLAB's insiders hold all 1.78Mn shares directly, in their own names, with no indirect holdings.
PLAB's insider total is spread across 16 insiders who have filed a Form 4 in the past two years.
Photronics' top three insider holders by shares held are Constantine S. Macricostas (Director, 410.89K shares), Kang Jyh Lee (Director, 337.35K shares) and George Macricostas (CEO, 334.07K shares).
The largest insider, Constantine S. Macricostas, holds 23.14% of PLAB's insider total.
Institutional investors held 94.63% of Photronics stock at the end of Q2 2026, while the latest Form 4 filings of its insiders account for about 3.05%; other investors, including the public, hold roughly 2.32%.
Over the trailing 12 months, 15 insiders reported transactions in PLAB stock across 63 Form 4 filings.
The insider holdings and trades above for Photronics reflect Form 4 filings through October 2, 2026.

Form 4 Holdings

Insiders Holding PLAB

Insiders 19

Shares held 4.19Mn

Of outstanding 7.20%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Constantine S Macricostas	Director	882,192	882,192	21.1%	15 Apr, 2026
2	Kang Jyh Lee	Chief Executive Officer	731,950	731,950	17.5%	01 Oct, 2026
3	Richelle E Burr	Evp, Cao, Gc Secretary	540,446	540,446	12.9%	22 May, 2024
4	Peter S Kirlin	Chief Executive Officer	438,571	438,571	10.5%	02 Mar, 2022
5	George Macricostas	Ceo	417,068	417,068	10.0%	10 Apr, 2026
6	Eric Rivera	President, Cfo	235,050	235,050	5.6%	02 Oct, 2026
7	Christopher J Progler	Evp, Chief Technology Officer	165,591	165,591	4.0%	16 Dec, 2025
8	John P Jordan	Evp, Cfo	138,756	138,756	3.3%	27 Feb, 2024
9	Daniel Jl Liao	Director	117,504	117,504	2.8%	15 Apr, 2026
10	Hsueh-Chun Wang	Svp/Coo Ic Us/Eu Mnstrm Ops	113,560	113,560	2.7%	16 Apr, 2026
11	Mitchell G Tyson	Director	108,300	108,300	2.6%	15 Apr, 2026
12	Han Kyung Park	Svp Gm Of Fpd Ops	66,000	66,000	1.6%	29 Sep, 2026
13	Adam M Lewis	Director	61,792	61,792	1.5%	15 Apr, 2026
14	Mary Paladino	Director	55,272	55,272	1.3%	21 Apr, 2026
15	Walter M Fiederowicz	Other	52,000	52,000	1.2%	17 Apr, 2025
16	Rui Zhang	Vp, Cao Corporate Controller	26,687	26,687	0.6%	02 Oct, 2026
17	Todd Anthony Alesio	Svp, Cao	17,946	17,946	0.4%	11 Feb, 2026
18	David A. Garcia	Director	15,192	15,192	0.4%	15 Apr, 2026
19	Michelle Almeida	Director	4,956	4,956	0.1%	15 Apr, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

1,788 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
01 Oct, 2026	Eric Rivera	President, Cfo	Disposed F	2,897	$30.83	$89.31K	133,276	Direct
01 Oct, 2026	Rui Zhang	Vp, Cao Corporate Controller	Disposed F	392	$30.83	$12.09K	26,687	Direct
29 Sep, 2026	Kang Jyh Lee	Director	Disposed S	10,000	$30.75	$307.50K	337,350	Direct
25 Sep, 2026	Han Kyung Park	Svp Gm Of Fpd Ops	Disposed S	9,500	$30.37	$288.52K	66,000	Direct
24 Sep, 2026	Kang Jyh Lee	Director	Disposed S	7,500	$29.50	$221.25K	347,350	Direct
22 Sep, 2026	Kang Jyh Lee	Director	Disposed S	10,000	$29.70	$297.00K	354,850	Direct
17 Apr, 2026	Rui Zhang	Vp, Cao Corporate Controller	Disposed S	4,556	$46.70	$212.77K	27,079	Direct
17 Apr, 2026	Mary Paladino	Director	Disposed D	22,548	$47.77	$1.08Mn	1,272	Direct
16 Apr, 2026	Kang Jyh Lee	Director	Disposed S	10,000	$46.05	$460.50K	365,850	Direct
16 Apr, 2026	Kang Jyh Lee	Director	Disposed S	10,000	$45.80	$458.00K	355,850	Direct
15 Apr, 2026	Kang Jyh Lee	Director	Disposed S	10,000	$45.10	$451.00K	375,850	Direct
14 Apr, 2026	Hsueh-Chun Wang	Svp/Coo Ic Us/Eu Mnstrm Ops	Disposed S	19,250	$45.30	$872.03K	113,560	Direct
13 Apr, 2026	Constantine S Macricostas	Director	Acquired A	3,722	$0.00	$0	414,617	Direct
13 Apr, 2026	Michelle Almeida	Director	Acquired A	3,722	$0.00	$0	4,956	Direct
13 Apr, 2026	Adam M Lewis	Director	Acquired A	3,722	$0.00	$0	34,792	Direct
13 Apr, 2026	Mitchell G Tyson	Director	Acquired A	3,722	$0.00	$0	36,921	Direct
13 Apr, 2026	Kang Jyh Lee	Director	Acquired M	5,000	$8.60	$43.00K	390,850	Direct
13 Apr, 2026	Daniel Jl Liao	Director	Acquired A	3,722	$0.00	$0	72,504	Direct
13 Apr, 2026	Eric Rivera	President, Cfo	Acquired M	1,000	$9.78	$9.78K	137,173	Direct
13 Apr, 2026	David A. Garcia	Director	Acquired A	3,722	$0.00	$0	15,192	Direct

Showing 1 to 20 of 1,788 transactions