Company · Ownership research

PHOTRONICS INC PLAB

CIK 0000810136

Form 4 transactions dated Nov 1, 2023 to Nov 7, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 37 rows; the complete set is available through the API.

Insider filings on file run through Oct 2, 2026.

Insider purchases & sales

Purchased: $50.35K
Sold: $35.68M

Nov 1, 2023 – Oct 2, 2026
Available records · partial months are marked ·

202610 of 30 preview events · 37 available in 2026

Date	Insider	Activity	Trade value (USD)	% of prior holding
Sep 29, 2026	Lee Kang Jyh Director	Sale	$307.50K 10,000 shares sold	2.88% sold Direct holding	▾
Sep 25, 2026	Park Han Kyung SVP & GM of FPD Ops	Sale	$288.51K 9,500 shares sold	12.58% sold Direct holding	▾
Sep 24, 2026	Lee Kang Jyh Director	Sale	$221.25K 7,500 shares sold	2.11% sold Direct holding	▾
Sep 22, 2026	Lee Kang Jyh Director	Sale	$297.00K 10,000 shares sold	2.74% sold Direct holding	▾
Apr 17, 2026	ZHANG RUI VP, CAO & Corporate Controller	Sale	$212.77K 4,556 shares sold	14.40% sold Direct holding	▾
Apr 16, 2026	Lee Kang Jyh Director	Sale	$918.50K 20,000 shares sold	5.32% sold Direct holding	▾
Apr 15, 2026	Lee Kang Jyh Director	Sale	$451.00K 10,000 shares sold	2.59% sold Direct holding	▾
Apr 14, 2026	Wang Hsueh-Chun SVP/COO IC & US/EU Mnstrm Ops	Sale	$872.02K 19,250 shares sold	14.49% sold Direct holding	▾
Apr 14, 2026	MACRICOSTAS CONSTANTINE S Director	Sale	$2.27M 50,000 shares sold	100.00% sold Indirect holding	▾
Apr 13, 2026	Lee Kang Jyh Director	Sale	$225.00K 5,000 shares sold	1.28% sold Direct holding	▾

Showing 30 / 37 record groups in 2026. The complete set is available through the API.

PHOTRONICS INC · PLAB

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 30 of 37 purchase / sale groups and 30 of 38 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"PLAB","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.