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

TSM (NYSE: TSM) VP adds shares through ESPP and reports 2.7M held

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

Rhea-AI Filing Summary

TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD VP Chuang Tzu-Sou reported an indirect open-market purchase of 48 Common Shares (2330.TW) on May 8, 2026 at $71.82 per share. The shares were bought by the administrator of the company’s Employee Stock Purchase Plan on his behalf and are held by an ESPP trust.

Following this transaction, he indirectly holds 5,668 shares via the ESPP trust and 7,036 shares via a Long-Term Incentive bonus plan trust, and directly holds 2,695,165 shares. The filing shows a small net buy activity relative to his overall position.

Positive

  • None.

Negative

  • None.
Insider Chuang Tzu-Sou
Role VP
Bought 48 shs ($3K)
Type Security Shares Price Value
Purchase Common Shares (2330.TW) 48 $71.82 $3K
holding Common Shares (2330.TW) -- -- --
holding Common Shares (2330.TW) -- -- --
Holdings After Transaction: Common Shares (2330.TW) — 5,668 shares (Indirect, By ESPP Trust); Common Shares (2330.TW) — 2,695,165 shares (Direct, null)
Footnotes (1)
  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. The price was translated from the average purchase price of NT$2,257.1777 in New Taiwan dollars, at the rate of NT$31.429 to US$1. Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP"). 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.
Open-market purchase size 48 shares Common Shares (2330.TW) bought May 8, 2026 via ESPP trust
Purchase price $71.82 per share Average price for 48 Common Shares under ESPP
Direct holdings after transaction 2,695,165 shares Common Shares held directly following reported activity
ESPP trust holdings after transaction 5,668 shares Common Shares held indirectly via ESPP trust
LTI trust holdings 7,036 shares Common Shares held indirectly via LTI Bonus Plan trust
Average ESPP cost in NT$ NT$2,257.1777 Average purchase price translated to $71.82 at NT$31.429/US$1
FX rate used NT$31.429 to US$1 Rate applied to translate ESPP purchase price
Employee Stock Purchase Plan financial
"Common Shares purchased by the administrator of the issuer's Employee Stock Purchase Plan ("ESPP") on behalf of the filer"
An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.
Long-Term Incentive Bonus Plan financial
"Represents Common Shares purchased by a trust with cash received under the issuer's Long-Term Incentive ("LTI") Bonus Plan"
indirect ownership financial
"total_shares_following_transaction: 5,668.0000, ownership_type: indirect, nature_of_ownership: By ESPP Trust"
open-market purchase financial
"transaction_action: open-market purchase, transaction_code_description: Purchase in open market or private transaction"
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
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)
05/08/2026		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)2,695,165D
Common Shares (2330.TW)05/08/2026(1)PV48A$71.82(2)5,668(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$2,257.1777 in New Taiwan dollars, at the rate of NT$31.429 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-fact05/11/2026
** 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

FAQ

What insider transaction did TSM VP Chuang Tzu-Sou report on this Form 4?

TSM VP Chuang Tzu-Sou reported an indirect open-market purchase of 48 Common Shares (2330.TW) on May 8, 2026. The shares were acquired under the company’s Employee Stock Purchase Plan and are held by an ESPP trust on his behalf.

How many TSM shares did Chuang Tzu-Sou buy and at what price?

He indirectly bought 48 TSM Common Shares at an average price of $71.82 per share. The price reflects a translation from an average cost of NT$2,257.1777 using an exchange rate of NT$31.429 to US$1, as noted in the filing.

What are Chuang Tzu-Sou’s TSM shareholdings after this reported transaction?

After the transaction, he holds 2,695,165 Common Shares directly. Indirectly, he holds 5,668 shares through an ESPP trust and 7,036 shares through a Long-Term Incentive bonus plan trust, giving a substantial combined position according to this Form 4 disclosure.

How were the new TSM shares for Chuang Tzu-Sou acquired under the ESPP?

The new shares were purchased by the administrator of Taiwan Semiconductor’s Employee Stock Purchase Plan pursuant to predetermined terms. They were acquired on behalf of Chuang Tzu-Sou and are held by an ESPP trust, reflecting routine compensation-related share accumulation.

What is the role of the Long-Term Incentive (LTI) trust in Chuang Tzu-Sou’s TSM holdings?

The LTI trust holds Common Shares purchased with cash received under Taiwan Semiconductor’s Long-Term Incentive Bonus Plan. The filing states that Chuang Tzu-Sou has obtained investment control over these shares, which total 7,036 and are reported as indirect ownership.

Does this TSM Form 4 show any insider share sales by Chuang Tzu-Sou?

No sales are reported in this Form 4. The transaction summary shows one net-buy transaction of 48 shares and no sell transactions. Additional entries simply update direct and indirect holdings without indicating any disposition of Taiwan Semiconductor shares.