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  4. [Form 4] TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD Insider Trading Activity

TAIWAN SEMICONDUCTOR (TSM) VP adds shares through ESPP and LTI trusts

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD VP Chuang Tzu-Sou reported a small open-market-equivalent purchase of 47 Common Shares on 2026-08-07 at $73.31 per share. The shares were bought in New York–listed form by the administrator of the issuer’s Employee Stock Purchase Plan (ESPP) and are held in an ESPP trust for Chuang’s benefit.

After this transaction, Chuang’s positions include 1,495,165 Common Shares held directly, 5,806 shares held indirectly via the ESPP trust, and 7,036 shares held indirectly by a trust funded through the issuer’s Long-Term Incentive (LTI) Bonus Plan, over which Chuang has investment control.

Positive

  • None.

Negative

  • None.
Insider Chuang Tzu-Sou
Role VP
Bought 47 shs ($3K)
Type Security Shares Price Value
Purchase Common Shares (2330.TW) F1, F2, F3 47 $73.31 $3K
holding Common Shares (2330.TW) -- -- --
holding Common Shares (2330.TW) F4 -- -- --
Holdings After Transaction: Common Shares (2330.TW) — 5,806 shares (Indirect, By ESPP Trust); Common Shares (2330.TW) — 1,495,165 shares (Direct); Common Shares (2330.TW) — 7,036 shares (Indirect, By LTI Trust)
Footnotes (4)
  1. F1. Common Shares purchased by the administrator of the issuer's Employee Stock Purchase Plan ("ESPP") on behalf of the filer pursuant to terms predetermined by the issuer.
  2. F2. The price was translated from the average purchase price of NT$2,367.1117 in New Taiwan dollars, at the rate of NT$32.288 to US$1.
  3. F3. Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP").
  4. F4. Represents Common Shares purchased by a trust with cash received under the issuer's Long-Term Incentive ("LTI") Bonus Plan, over which the filer has obtained investment control.
Shares purchased 47 Common Shares ESPP-related purchase on 2026-08-07
Purchase price $73.31 per share Translated from NT$2,367.1117 at NT$32.288 to US$1
Direct holdings after transaction 1,495,165 Common Shares Directly held by Chuang Tzu-Sou after 2026-08-07
Indirect ESPP trust holdings 5,806 Common Shares Held indirectly by ESPP Trust after purchase
Indirect LTI trust holdings 7,036 Common Shares Held indirectly by LTI Trust with investment control
ESPP NT$ price NT$2,367.1117 Average purchase price before FX translation
FX rate NT$32.288 to US$1 Exchange rate used to translate ESPP purchase price
Employee Stock Purchase Plan ("ESPP") financial
"Common Shares purchased by the administrator of the issuer's Employee Stock Purchase Plan ("ESPP")"
ESPP Trust financial
"Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP")."
Long-Term Incentive ("LTI") Bonus Plan financial
"cash received under the issuer's Long-Term Incentive ("LTI") Bonus Plan, over which the filer has obtained investment control"
indirect ownership financial
"total_shares_following_transaction": "5806.0000", "direct_or_indirect": "I""
beneficial ownership financial
"Represents Common Shares purchased by a trust ... over which the filer has obtained investment control."
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

FAQ

What did TSM VP Chuang Tzu-Sou report in this Form 4 transaction for TSM?
TSM VP Chuang Tzu-Sou reported buying 47 Common Shares on 2026-08-07 at $73.31 per share. The purchase was made through the administrator of TSM’s Employee Stock Purchase Plan (ESPP) and is held indirectly via an ESPP trust.

How many TSM shares does Chuang Tzu-Sou hold directly after this Form 4?
After the reported activity, Chuang directly holds 1,495,165 TSM Common Shares. This direct position is separate from additional indirect holdings in an ESPP trust and an LTI Bonus Plan trust, which are reported as indirect beneficial ownership.

What is the additional LTI trust position in TSM reported by Chuang Tzu-Sou?
Chuang also reports 7,036 TSM Common Shares held indirectly “By LTI Trust.” A footnote states these shares were bought by a trust using cash from TSM’s Long-Term Incentive (LTI) Bonus Plan, over which Chuang has obtained investment control.

How was the $73.31 purchase price for TSM shares determined in this Form 4?
The per-share price of $73.31 was derived from an average purchase price of NT$2,367.1117 in New Taiwan dollars, translated at a stated exchange rate of NT$32.288 to US$1, according to the filing’s pricing footnote.

Were the reported TSM share purchases by Chuang Tzu-Sou under a Rule 10b5-1 plan?
The filing’s Rule 10b5-1 checkbox is marked negative, indicating the transaction was not affirmed as made under a Rule 10b5-1 trading plan. However, the ESPP purchase followed terms predetermined by TSM under the plan’s rules.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Chuang Tzu-Sou
(Last)(First)(Middle)
NO. 8, LI-HSIN ROAD 6
HSINCHU SCIENCE PARK
(Street)
HSINCHUTAIWAN300096
(City)(State)(Zip)
TAIWAN
(Country)		2. Issuer Name and Ticker or Trading Symbol
TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD [ TSM ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
VP
2a. Foreign Trading Symbol
[2330.TW]
3. Date of Earliest Transaction (Month/Day/Year)
08/07/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Shares (2330.TW)1,495,165D
Common Shares (2330.TW)08/07/2026(1)P47A$73.31(2)5,806(3)IBy ESPP Trust
Common Shares (2330.TW)7,036(4)IBy LTI Trust
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Common Shares purchased by the administrator of the issuer's Employee Stock Purchase Plan ("ESPP") on behalf of the filer pursuant to terms predetermined by the issuer.
2. The price was translated from the average purchase price of NT$2,367.1117 in New Taiwan dollars, at the rate of NT$32.288 to US$1.
3. Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP").
4. Represents Common Shares purchased by a trust with cash received under the issuer's Long-Term Incentive ("LTI") Bonus Plan, over which the filer has obtained investment control.
Remarks:
/s/ Jen-Chau Huang, as attorney-in-fact08/10/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR