Insider trading

Period: 12 months Stock: PLAB Plan: Not on a plan × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

43 decisions over 12 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

43 decisions over 12 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

43 decisions over 12 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

43 decisions over 12 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
43 decisions over 12 months Remove this filter
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
43 decisions over 12 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

43 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
29 Sep 2026
Lee Kang Jyh Director
Sold at will
$307.50K 10,000 at 30.75
2.9%
Not planned
25 Sep 2026
Park Han Kyung SVP & GM of FPD Ops
Sold at will
$288.52K 9,500 at 30.37
12.6%
Not planned
24 Sep 2026
Lee Kang Jyh Director
Sold at will
$221.25K 7,500 at 29.50
2.1%
Not planned
22 Sep 2026
Lee Kang Jyh Director
Sold at will
$297.00K 10,000 at 29.70
2.7%
Not planned
17 Apr 2026
ZHANG RUI VP, CAO & Corporate Controller
Sold at will
$212.77K 4,556 at 46.70
14.4%
Not planned
16 Apr 2026
Lee Kang Jyh Director
Sold at will 2×
$918.50K 20,000 at 45.93
5.3%
Not planned
15 Apr 2026
Lee Kang Jyh Director
Sold at will
$451.00K 10,000 at 45.10
2.6%
Not planned
14 Apr 2026
MACRICOSTAS CONSTANTINE S Director · indirect
Sold at will
$2.27M 50,000 at 45.35
100%
Sold half or more
14 Apr 2026
Wang Hsueh-Chun SVP/COO IC & US/EU Mnstrm Ops
Sold at will
$872.03K 19,250 at 45.30
14.5%
Not planned
13 Apr 2026
Lee Kang Jyh Director
Sold at will
$225.00K 5,000 at 45.00
1.3%
Not planned
13 Apr 2026
Rivera Eric President, CFO
Sold at will
$44.77K 1,000 at 44.77
0.7%
Not planned
9 Apr 2026
Rivera Eric President, CFO
Sold at will 2×
$1.83M 41,517 at 44.00
23.4%
Not planned
9 Apr 2026
Wang Hsueh-Chun SVP/COO IC & US/EU Mnstrm Ops
Sold at will
$525.47K 11,875 at 44.25
8.2%
Not planned
9 Apr 2026
Lee Kang Jyh Director
Sold at will
$220.00K 5,000 at 44.00
1.3%
Not planned
8 Apr 2026
Sold at will 3×
$5.20M 121,194 at 42.94
26.6%
Not planned
8 Apr 2026
Wang Hsueh-Chun SVP/COO IC & US/EU Mnstrm Ops
Sold at will
$426.90K 10,000 at 42.69
6.5%
Not planned
8 Apr 2026
Lee Kang Jyh Director
Sold at will
$216.35K 5,000 at 43.27
1.3%
Not planned
8 Apr 2026
ZHANG RUI VP, CAO & Corporate Controller
Sold at will
$76.21K 1,752 at 43.50
5.2%
Not planned
6 Apr 2026
Lee Kang Jyh Director
Sold at will
$202.65K 5,000 at 40.53
1.3%
Not planned
1 Apr 2026
TYSON MITCHELL G Director
Sold at will
$423.10K 10,000 at 42.31
23.1%
Not planned
1 Apr 2026
Wang Hsueh-Chun SVP/COO IC & US/EU Mnstrm Ops
Sold at will 3×
$420.83K 10,000 at 42.08
6.1%
Not planned
1 Apr 2026
Lee Kang Jyh Director
Sold at will
$210.00K 5,000 at 42.00
1.3%
Not planned
26 Mar 2026
Lee Kang Jyh Director
Sold at will
$204.00K 5,000 at 40.80
1.3%
Not planned
23 Mar 2026
Lee Kang Jyh Director
Sold at will
$390.00K 10,000 at 39.00
2.5%
Not planned
19 Mar 2026
Lee Kang Jyh Director
Sold at will
$358.00K 10,000 at 35.80
2.4%
Not planned
16 Jan 2026
Lee Kang Jyh Director
Sold at will
$345.10K 10,000 at 34.51
2.4%
Not planned
16 Jan 2026
Park Han Kyung SVP & GM of FPD Ops
Sold at will
$218.06K 6,250 at 34.89
7.6%
Not planned
15 Jan 2026
Lee Kang Jyh Director
Sold at will
$341.30K 10,000 at 34.13
2.3%
Not planned
13 Jan 2026
Lee Kang Jyh Director
Sold at will
$344.20K 10,000 at 34.42
2.3%
Not planned
13 Jan 2026
Park Han Kyung SVP & GM of FPD Ops
Sold at will
$252.75K 7,500 at 33.70
8.4%
Not planned
12 Jan 2026
Lee Kang Jyh Director
Sold at will
$330.50K 10,000 at 33.05
2.2%
Not planned
7 Jan 2026
Lee Kang Jyh Director
Sold at will
$348.30K 10,000 at 34.83
2.2%
Not planned
6 Jan 2026
Paladino Mary Director
Sold at will
$394.99K 11,250 at 35.11
32.1%
Not planned
6 Jan 2026
Lee Kang Jyh Director
Sold at will
$354.10K 10,000 at 35.41
2.1%
Not planned
6 Jan 2026
TYSON MITCHELL G Director
Sold at will
$176.05K 5,000 at 35.21
10.4%
Not planned
5 Jan 2026
Lee Kang Jyh Director
Sold at will
$339.00K 10,000 at 33.90
2.1%
Not planned
2 Jan 2026
Lee Kang Jyh Director
Sold at will
$293.48K 8,750 at 33.54
1.8%
Not planned
22 Dec 2025
Lee Kang Jyh Director
Sold at will
$300.21K 8,750 at 34.31
1.8%
Not planned
15 Dec 2025
Lee Kang Jyh Director
Sold at will
$729.00K 20,000 at 36.45
3.9%
Not planned
12 Dec 2025
Progler Christopher J EVP, Chief Technology Officer
Sold at will
$894.50K 25,000 at 35.78
13.1%
Not planned
12 Dec 2025
Lee Kang Jyh Director
Sold at will
$770.60K 20,000 at 38.53
3.9%
Not planned
12 Dec 2025
Park Han Kyung SVP & GM of FPD Ops
Sold at will
$522.36K 13,750 at 37.99
13.3%
Not planned
12 Dec 2025
TYSON MITCHELL G Director
Sold at will
$180.85K 5,000 at 36.17
9.6%
Not planned
Showing 1–43 of 43.