TSMWF's three largest insider shareholders as of September 17, 2026 are Fang Churng Tseng (Director, 34.61Mn shares), Che-Chia Wei (Chairman And Ceo, 7.66Mn shares), Yung-Pei Chin (Evp And Co Coo, 5.20Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Fang Churng Tseng | Director | 24,472,675 | 10,132,855 | 34,605,530 | 99.0% | 31 Jul, 2026 |
| 2 | Tzonz-Sheng Chang | Svp | 0 | 178,481 | 178,481 | 0.5% | 09 Sep, 2026 |
| 3 | Che-Chia Wei | Chairman And Ceo | 0 | 18,136 | 18,136 | 0.1% | 09 Sep, 2026 |
| 4 | Shu-Hua Fang | Svp And Gc | 0 | 14,914 | 14,914 | 0.0% | 09 Sep, 2026 |
| 5 | Yung-Pei Chin | Evp And Co Coo | 0 | 8,506 | 8,506 | 0.0% | 09 Sep, 2026 |
| 6 | Yuh-Jier Mii | Evp And Co Coo | 0 | 8,170 | 8,170 | 0.0% | 09 Sep, 2026 |
| 7 | Yung-Chin Hou | Svp And Deputy Co Coo | 0 | 7,521 | 7,521 | 0.0% | 09 Sep, 2026 |
| 8 | Kevin Xiaoqiang Zhang | Svp And Deputy Co Coo | 0 | 7,347 | 7,347 | 0.0% | 09 Sep, 2026 |
| 9 | Shien-Yang Wu | Svp | 0 | 6,862 | 6,862 | 0.0% | 09 Sep, 2026 |
| 10 | Min Cao | Vp | 0 | 6,773 | 6,773 | 0.0% | 09 Sep, 2026 |
| 11 | Kuo-Chin Hsu | Vp | 0 | 6,729 | 6,729 | 0.0% | 09 Sep, 2026 |
| 12 | Chue-San Yoo | Vp | 0 | 6,694 | 6,694 | 0.0% | 09 Sep, 2026 |
| 13 | Choh Fei Yeap | Svp | 0 | 6,547 | 6,547 | 0.0% | 09 Sep, 2026 |
| 14 | Ying-Lang Wang | Svp | 0 | 6,499 | 6,499 | 0.0% | 09 Sep, 2026 |
| 15 | Lee-Chung Lu | Vp | 0 | 6,485 | 6,485 | 0.0% | 09 Sep, 2026 |
| 16 | Yung-Haw Liaw | Vp | 0 | 6,241 | 6,241 | 0.0% | 09 Jul, 2026 |
| 17 | Chun-Hsien Lee | Svp | 0 | 6,041 | 6,041 | 0.0% | 09 Sep, 2026 |
| 18 | Chris Horng-Dar Lin | Vp And Cio | 0 | 5,978 | 5,978 | 0.0% | 09 Sep, 2026 |
| 19 | Syun-Ming Jang | Vp | 0 | 5,942 | 5,942 | 0.0% | 09 Sep, 2026 |
| 20 | Tzu-Sou Chuang | Vp | 0 | 5,853 | 5,853 | 0.0% | 09 Sep, 2026 |
| 21 | Bor-Zen Tien | Vp | 132 | 5,398 | 5,530 | 0.0% | 09 Sep, 2026 |
| 22 | Jun He | Vp | 0 | 5,407 | 5,407 | 0.0% | 09 Sep, 2026 |
| 23 | Shyue-Shyh Lin | Vp | 0 | 5,340 | 5,340 | 0.0% | 09 Sep, 2026 |
| 24 | Juiping Chuang | Vp | 0 | 4,292 | 4,292 | 0.0% | 09 Sep, 2026 |
| 25 | Jen-Chau Huang | Svp And Cfo | 0 | 3,583 | 3,583 | 0.0% | 09 Sep, 2026 |
| 26 | Lipen Yuan | Vp | 0 | 3,301 | 3,301 | 0.0% | 09 Sep, 2026 |
| 27 | Ursula M Burns | Director | 3,000 | 0 | 3,000 | 0.0% | 01 Apr, 2026 |
| 28 | Pei-Hung Chen | Vp | 0 | 1,395 | 1,395 | 0.0% | 09 Sep, 2026 |
| 29 | Chih-Ho Chen | Controller | 0 | 565 | 565 | 0.0% | 09 Sep, 2026 |
| 30 | Yuan-Ko Hwang | Vp | 0 | 299 | 299 | 0.0% | 09 Sep, 2026 |
| 31 | Yao-Ching Ku | Vp | 0 | 188 | 188 | 0.0% | 09 Sep, 2026 |
| 32 | Yi-Huang Wu | Vp | 0 | 160 | 160 | 0.0% | 09 Sep, 2026 |
| 33 | Chin-Sheng Lu | Vp | 0 | 151 | 151 | 0.0% | 09 Sep, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 07 Sep, 2026 | Che-Chia Wei | Chairman And Ceo | Acquired P | 149 | $76.20 | $11.35K | 18,136 | Indirect |
| 07 Sep, 2026 | Chih-Ho Chen | Controller | Acquired P | 32 | $76.20 | $2.44K | 202 | Indirect |
| 07 Sep, 2026 | Syun-Ming Jang | Vp | Acquired P | 49 | $76.20 | $3.73K | 5,942 | Indirect |
| 07 Sep, 2026 | Tzonz-Sheng Chang | Svp | Acquired P | 53 | $76.20 | $4.04K | 5,481 | Indirect |
| 07 Sep, 2026 | Lee-Chung Lu | Vp | Acquired P | 51 | $76.20 | $3.89K | 6,485 | Indirect |
| 07 Sep, 2026 | Chue-San Yoo | Vp | Acquired P | 53 | $76.20 | $4.04K | 6,694 | Indirect |
| 07 Sep, 2026 | Yung-Chin Hou | Svp And Deputy Co Coo | Acquired P | 61 | $76.20 | $4.65K | 7,521 | Indirect |
| 07 Sep, 2026 | Min Cao | Vp | Acquired P | 56 | $76.20 | $4.27K | 6,773 | Indirect |
| 07 Sep, 2026 | Shu-Hua Fang | Svp And Gc | Acquired P | 56 | $76.20 | $4.27K | 6,708 | Indirect |
| 07 Sep, 2026 | Choh Fei Yeap | Svp | Acquired P | 54 | $76.20 | $4.11K | 6,547 | Indirect |
| 07 Sep, 2026 | Shyue-Shyh Lin | Vp | Acquired P | 44 | $76.20 | $3.35K | 340 | Indirect |
| 07 Sep, 2026 | Shien-Yang Wu | Svp | Acquired P | 57 | $76.20 | $4.34K | 6,862 | Indirect |
| 07 Sep, 2026 | Lipen Yuan | Vp | Acquired P | 41 | $76.20 | $3.12K | 1,301 | Indirect |
| 07 Sep, 2026 | Ying-Lang Wang | Svp | Acquired P | 54 | $76.20 | $4.11K | 6,499 | Indirect |
| 07 Sep, 2026 | Jen-Chau Huang | Svp And Cfo | Acquired P | 30 | $76.20 | $2.29K | 3,583 | Indirect |
| 07 Sep, 2026 | Chin-Sheng Lu | Vp | Acquired P | 38 | $76.20 | $2.90K | 151 | Indirect |
| 07 Sep, 2026 | Tzu-Sou Chuang | Vp | Acquired P | 47 | $76.20 | $3.58K | 5,853 | Indirect |
| 07 Sep, 2026 | Chun-Hsien Lee | Svp | Acquired P | 52 | $76.20 | $3.96K | 6,041 | Indirect |
| 07 Sep, 2026 | Yao-Ching Ku | Vp | Acquired P | 47 | $76.20 | $3.58K | 188 | Indirect |
| 07 Sep, 2026 | Pei-Hung Chen | Vp | Acquired P | 46 | $76.20 | $3.51K | 1,395 | Indirect |