Insider trading

Period: 12 months Stock: TSM Plan: Not on a plan × Share of holding: 50% or more × + Add filter Clear all
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When

Period

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

19 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.

19 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.

19 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.

19 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.
19 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
19 decisions over 12 months Remove this filter
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.

19 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
7 Oct 2026
Yeap Choh Fei SVP · indirect
Bought
$4.13K 52 at 79.39
×52
Cluster · 30 buyers
7 Oct 2026
Chang Tzonz-Sheng SVP · indirect
Bought
$4.05K 51 at 79.39
×51
Cluster · 30 buyers
7 Oct 2026
Chuang Juiping VP · indirect
Bought
$3.65K 46 at 79.39
×23
Cluster · 30 buyers
7 Oct 2026
Chuang Tzu-Sou VP · indirect
Bought
$3.65K 46 at 79.39
×46
Cluster · 30 buyers
7 Oct 2026
Lin Chris Horng-Dar VP and CIO · indirect
Bought
$3.49K 44 at 79.39
×44
Cluster · 30 buyers
7 Oct 2026
He Jun VP · indirect
Bought
$3.41K 43 at 79.39
×22
Cluster · 30 buyers
7 Aug 2026
Ku Yao-Ching VP · indirect
Bought
$3.45K 47 at 73.31
50.0%
Cluster · 30 buyers
7 Aug 2026
Wu Yi-Huang VP · indirect
Bought
$3.01K 41 at 73.31
51.9%
Cluster · 30 buyers
7 Aug 2026
Lu Chin-Sheng VP · indirect
Bought
$2.86K 39 at 73.31
52.7%
Cluster · 30 buyers
21 Jul 2026
Tien Bor-Zen VP · indirect
Bought 3×
$223.17K 3,000 at 74.39
300%
Cluster · 30 buyers
7 Jul 2026
Ku Yao-Ching VP · indirect
Bought
$3.52K 46 at 76.62
95.8%
Cluster · 30 buyers
7 Jul 2026
Wu Yi-Huang VP · indirect
Bought
$2.99K 39 at 76.62
97.5%
Cluster · 30 buyers
7 Jul 2026
Lu Chin-Sheng VP · indirect
Bought
$2.83K 37 at 76.62
100%
Cluster · 30 buyers
8 May 2026
Tien Bor-Zen VP · indirect
Bought 2×
$3.66K 51 at 71.82
54.3%
Cluster · 30 buyers
8 May 2026
Chen Chih-Ho Controller · indirect
Bought
$2.44K 34 at 71.82
85.0%
Cluster · 30 buyers
9 Apr 2026
Tien Bor-Zen VP · indirect
Bought 2×
$3.59K 62 at 57.87
159%
Cluster · 30 buyers
9 Apr 2026
Lin Shyue-Shyh VP · indirect
Bought
$3.36K 58 at 57.87
109%
Cluster · 30 buyers
9 Apr 2026
Hwang Yuan-Ko VP · indirect
Bought
$2.95K 51 at 57.87
111%
Cluster · 30 buyers
31 Mar 2026
BURNS URSULA M Director
Bought
$322.05K 1,000 at 322.05
50.0%
Cluster · 30 buyers
Showing 1–19 of 19.