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RUI ZHANG

CIK 2107725 · VP, CAO & Corporate Controller · last filed 2026-04-21

RUI ZHANG is a VP, CAO & Corporate Controller who has filed 5 SEC Form 4 insider transactions across 1 company since 2026. The most recent filing shows the insider sold $212.8K of PLAB on Apr 21, 2026. Across all open-market trades the lifetime net is −$289.0K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $806.4K across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$806.4K

Companies

1

Total Filings

5

Lifetime Open-Market Net

-$289.0K

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
PLAB VP, CAO & Corporate Controller 27,079 $29.78 $806.4K -$289.0K 3 2026-04-21

Recent Filings

5 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-04-21 PLAB Sell (S) −4,556 -$212.8K EDGAR
2026-04-17 PLAB Notice (144) −4,556 -$212.8K EDGAR
2026-04-10 PLAB Sell (S) −1,752 -$76.2K EDGAR
2026-04-08 PLAB Notice (144) −1,752 -$76.2K EDGAR
2026-02-11 PLAB Grant (A) +1,467 $0 EDGAR
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.