TSM at a glance
Taiwan Semiconductor Mfg (TSM, SEC CIK 1046179) filed Form 4 insider filings as recently as September 9, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- As of June 30, 2026, 65 institutional investment managers tracked by SignalX reported holding Taiwan Semiconductor Mfg (TSM) shares worth $106.9 billion in 13F-HR filings.
- The most recent insider open-market purchase reported on Form 4 was by Mii Yuh-Jier on September 7, 2026 of 71 shares at $76.20 per share.
- In the last 90 days, TSM insiders reported 80 open-market purchases ($1.2M) and 1 open-market sale ($4K) on Form 4, a net purchase of $1.2M.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Insiders · 90 days
- 80 buys · 1 sell
- Net +$1.2M
- 13F holders
- 65 funds
- $106.9B · +4 vs prior quarter
SignalX for TSM
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Mii Yuh-Jier | Buy | Sep 7, 2026 | 71 | $76.20 |
| Tien Bor-Zen | Buy | Sep 7, 2026 | 43 | $76.20 |
| Yeap Choh Fei | Buy | Sep 7, 2026 | 54 | $76.20 |
| Yuan Lipen | Buy | Sep 7, 2026 | 41 | $76.20 |
| Wu Shien-Yang | Buy | Sep 7, 2026 | 57 | $76.20 |
| Wei Che-Chia | Buy | Sep 7, 2026 | 149 | $76.20 |
| Wu Yi-Huang | Buy | Sep 7, 2026 | 40 | $76.20 |
| Yoo Chue-San | Buy | Sep 7, 2026 | 53 | $76.20 |
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate TSM share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 65 | $106.88B |
| Q1 2026 | 61 | $74.86B |
| Q4 2025 | 57 | $70.76B |
| Q3 2025 | 57 | $77.70B |
| Q2 2025 | 58 | $55.95B |
| Q1 2025 | 51 | $36.60B |
| Q4 2024 | 49 | $29.38B |
| Q3 2024 | 45 | $14.34B |
- Goldman Sachs Group+6.72M (+72%)
- T. Rowe Price Group+3.16M (+39%)
- BlackRock+1.89M (+10%)
- Bank of America Corp+1.17M (+8%)
- Morgan Stanley+1.08M (+7%)
- Citadel Advisors LLC−3.51M (-87%)
- D.E. Shaw & Co−2.29M (-75%)
- FMR LLC (Fidelity)−1.46M (-2%)
- BNY Mellon−1.38M (-15%)
- Viking Global Investors−1.30M (-29%)
Source: 13F-HR filings on SEC EDGAR (aggregated from 443 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing date | Period | Analysis | SEC |
|---|---|---|---|---|
| 6-K | Sep 24, 2026 | - | - | - |
| 6-K | Sep 10, 2026 | - | - | - |
| 4 | Sep 9, 2026 | - | - | - |
| 4 | Sep 9, 2026 | - | - | - |
| 4 | Sep 9, 2026 | - | - | - |
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| 4 | Sep 9, 2026 | - | - | - |
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TSM SEC filings: frequently asked questions
Are TSM insiders buying or selling?
In the last 90 days, Taiwan Semiconductor Mfg (TSM) officers, directors and 10% owners reported 80 open-market purchases worth $1.2 million by 30 insiders and 1 open-market sale worth $3,761 by 1 insider on Form 4, a net purchase of $1.2 million. Many insider sales are pre-planned or for taxes, so purchases usually carry more information.
Which institutions hold TSM stock?
As of June 30, 2026, the largest Taiwan Semiconductor Mfg (TSM) holders among the 13F filers tracked by SignalX were FMR LLC (Fidelity) ($28.1 billion), JPMorgan Chase & Co ($10.8 billion), BlackRock ($9.6 billion), Goldman Sachs Group ($7.7 billion), Morgan Stanley ($7.6 billion). 13F-HR reports are filed up to 45 days after each quarter ends.
What are the latest TSM SEC filings?
Taiwan Semiconductor Mfg (TSM) filed a Form 4 insider filing on September 9, 2026.
What is TSM's SEC CIK number?
Taiwan Semiconductor Mfg (TSM)'s SEC Central Index Key (CIK) is 1046179. EDGAR lists every TSM filing under that number.
Ask anything about TSM
The research agent reads TSM's filings, financials, insider trades and 13F holders, then answers with sources.