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TSM · TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD

Everything on this page is public record — SEC Form 4 filings and congressional disclosures — alongside any INSIDER SCANNER research case for this company.

Open-market buys31
Open-market sells0
Total purchased$121,467
Unique insiders buying30
Most senior buyerCEO
Avg price paid$79.39
Research cases0
Last filing2026-10-07

Average price paid is weighted by shares, so a large purchase counts for more than a small one. It is what insiders reported paying, not a target or a fair value.

Insider flow: Buying only — a count of disclosed transactions, not a rating or a recommendation.

Insider transaction timeline

Every reported transaction, positioned by trade date. Purchases sit above the axis, sales below; circle area is proportional to dollar value. No share-price line is drawn — this feed carries transaction prices only, and a price history inferred from them would imply market data the filings do not contain.

Open-market purchase Open-market sale
2026-10-07 — Chen Chih-Ho · bought 31 @ $79.39 2026-10-07 — Chen Pei-Hung · bought 43 @ $79.39 2026-10-07 — Chuang Juiping · bought 46 @ $79.39 2026-10-07 — Fang Shu-Hua · bought 53 @ $79.39 2026-10-07 — Chang Tzonz-Sheng · bought 51 @ $79.39 2026-10-07 — Chin Yung-Pei · bought 67 @ $79.39 2026-10-07 — Cao Min · bought 51 @ $79.39 2026-10-07 — Chuang Tzu-Sou · bought 46 @ $79.39 2026-10-07 — He Jun · bought 43 @ $79.39 2026-10-07 — Hsu Kuo-Chin · bought 52 @ $79.39 2026-10-07 — Hou Yung-Chin · bought 60 @ $79.39 2026-10-07 — Jang Syun-Ming · bought 46 @ $79.39 2026-10-07 — Huang Jen-Chau · bought 28 @ $79.39 2026-10-07 — Hwang Yuan-Ko · bought 39 @ $79.39 2026-10-07 — Ku Yao-Ching · bought 46 @ $79.39 2026-10-07 — Lee Chun-Hsien · bought 51 @ $79.39 2026-10-07 — Lin Chris Horng-Dar · bought 44 @ $79.39 2026-10-07 — Lin Shyue-Shyh · bought 44 @ $79.39 2026-10-07 — Lu Lee-Chung · bought 49 @ $79.39 2026-10-07 — Lu Chin-Sheng · bought 36 @ $79.39 2026-10-07 — Tien Bor-Zen · bought 40 @ $79.39 2026-10-07 — Tien Bor-Zen · bought 7 @ $79.39 2026-10-07 — Mii Yuh-Jier · bought 68 @ $79.39 2026-10-07 — Wang Ying-Lang · bought 52 @ $79.39 2026-10-07 — Wu Yi-Huang · bought 39 @ $79.39 2026-10-07 — Wei Che-Chia · bought 144 @ $79.39 2026-10-07 — Wu Shien-Yang · bought 53 @ $79.39 2026-10-07 — Yoo Chue-San · bought 50 @ $79.39 2026-10-07 — Zhang Kevin Xiaoqiang · bought 59 @ $79.39 2026-10-07 — Yeap Choh Fei · bought 52 @ $79.39 2026-10-07 — Yuan Lipen · bought 40 @ $79.39
2026-10-072026-10-07

Insider cost basis

Share-weighted average price across 31 reported purchases, with the full range of prices paid. Purchases only — averaging a sale into an "insider cost" would describe a price nobody paid.

$79.39 $79.39
$79.39 weighted average insider purchase price

Insider participation

One row per insider, one cell per reported transaction, shaded by value. Repeat buying and activity clustered in time are visible at a glance.

Tien Bor-Zen VP
Chen Chih-Ho Controller
Chen Pei-Hung VP
Chuang Juiping VP
Fang Shu-Hua SVP and GC
Chang Tzonz-Sheng SVP
Chin Yung-Pei EVP and Co-COO
Cao Min VP
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The analysis built on top of these filings

The filings above are public record and stay public here. What an account adds for $TSM is the reading of them — and for this company, that is what the list below says it is, no more.

  • Insider cost basisShare-weighted average price paid across the 31 reported purchases, with the full range, against the current price.
  • Insider participationWho bought, how often, and how the buying is distributed across the people filing — one person repeating is not several agreeing.
  • Transaction timelineThe [{'transaction_date': '2026-10-07', 'insider_name': 'Chen Chih-Ho', 'insider_title': 'Controller', 'transaction_type': 'Open-market buy', 'shares': 31.0, 'price': 79.39, 'value': 2461.09, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Chen Pei-Hung', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 43.0, 'price': 79.39, 'value': 3413.77, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Chuang Juiping', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 46.0, 'price': 79.39, 'value': 3651.94, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Fang Shu-Hua', 'insider_title': 'SVP and GC', 'transaction_type': 'Open-market buy', 'shares': 53.0, 'price': 79.39, 'value': 4207.67, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Chang Tzonz-Sheng', 'insider_title': 'SVP', 'transaction_type': 'Open-market buy', 'shares': 51.0, 'price': 79.39, 'value': 4048.89, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Chin Yung-Pei', 'insider_title': 'EVP and Co-COO', 'transaction_type': 'Open-market buy', 'shares': 67.0, 'price': 79.39, 'value': 5319.13, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Cao Min', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 51.0, 'price': 79.39, 'value': 4048.89, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Chuang Tzu-Sou', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 46.0, 'price': 79.39, 'value': 3651.94, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'He Jun', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 43.0, 'price': 79.39, 'value': 3413.77, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Hsu Kuo-Chin', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 52.0, 'price': 79.39, 'value': 4128.28, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Hou Yung-Chin', 'insider_title': 'SVP and Deputy Co-COO', 'transaction_type': 'Open-market buy', 'shares': 60.0, 'price': 79.39, 'value': 4763.4, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Jang Syun-Ming', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 46.0, 'price': 79.39, 'value': 3651.94, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Huang Jen-Chau', 'insider_title': 'SVP and CFO', 'transaction_type': 'Open-market buy', 'shares': 28.0, 'price': 79.39, 'value': 2222.92, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Hwang Yuan-Ko', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 39.0, 'price': 79.39, 'value': 3096.21, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Ku Yao-Ching', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 46.0, 'price': 79.39, 'value': 3651.94, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Lee Chun-Hsien', 'insider_title': 'SVP', 'transaction_type': 'Open-market buy', 'shares': 51.0, 'price': 79.39, 'value': 4048.89, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Lin Chris Horng-Dar', 'insider_title': 'VP and CIO', 'transaction_type': 'Open-market buy', 'shares': 44.0, 'price': 79.39, 'value': 3493.16, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Lin Shyue-Shyh', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 44.0, 'price': 79.39, 'value': 3493.16, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Lu Lee-Chung', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 49.0, 'price': 79.39, 'value': 3890.11, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Lu Chin-Sheng', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 36.0, 'price': 79.39, 'value': 2858.04, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Tien Bor-Zen', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 40.0, 'price': 79.39, 'value': 3175.6, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Tien Bor-Zen', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 7.0, 'price': 79.39, 'value': 555.73, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Mii Yuh-Jier', 'insider_title': 'EVP and Co-COO', 'transaction_type': 'Open-market buy', 'shares': 68.0, 'price': 79.39, 'value': 5398.52, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Wang Ying-Lang', 'insider_title': 'SVP', 'transaction_type': 'Open-market buy', 'shares': 52.0, 'price': 79.39, 'value': 4128.28, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Wu Yi-Huang', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 39.0, 'price': 79.39, 'value': 3096.21, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Wei Che-Chia', 'insider_title': 'Chairman and CEO, Director', 'transaction_type': 'Open-market buy', 'shares': 144.0, 'price': 79.39, 'value': 11432.16, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Wu Shien-Yang', 'insider_title': 'SVP', 'transaction_type': 'Open-market buy', 'shares': 53.0, 'price': 79.39, 'value': 4207.67, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Yoo Chue-San', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 50.0, 'price': 79.39, 'value': 3969.5, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Zhang Kevin Xiaoqiang', 'insider_title': 'SVP and Deputy Co-COO', 'transaction_type': 'Open-market buy', 'shares': 59.0, 'price': 79.39, 'value': 4684.01, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Yeap Choh Fei', 'insider_title': 'SVP', 'transaction_type': 'Open-market buy', 'shares': 52.0, 'price': 79.39, 'value': 4128.28, 'is_buy': True}, {'transaction_date': '2026-10-07', 'insider_name': 'Yuan Lipen', 'insider_title': 'VP', 'transaction_type': 'Open-market buy', 'shares': 40.0, 'price': 79.39, 'value': 3175.6, 'is_buy': True}] reported transactions plotted over the window rather than listed, so concentration is visible.

Not available for TSM today: no research case — nothing here has cleared the scoring threshold. Both appear on this page on their own if that changes.

A free account opens all of it.

Not financial advice. This page reports public filings and past research output. It is not a recommendation to buy or sell, and no price target here is a prediction. Trade at your own risk.