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TSMC (NYSE: TSM) VP Tien Bor-Zen adds 17 ADS to direct stake

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

Rhea-AI Filing Summary

TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD VP Bor-Zen Tien reported open-market purchases of 17 American Depositary Shares, buying 10 ADS at 391.8064 per share on 2026-05-19 and 7 ADS at 400.0000 per share on 2026-05-20. Following these trades, he directly holds 107 ADS, with each ADS representing five common shares. As of 2026-05-19, he also directly holds 11,051 common shares and has additional indirect common share holdings through an immediate family member and an ESPP trust, indicating these ADS purchases are small relative to his overall position.

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Insider Tien Bor-Zen
Role VP
Bought 17 shs ($7K)
Type Security Shares Price Value
Purchase American Depositary Shares (TSM) 7 $400.00 $3K
Purchase American Depositary Shares (TSM) 10 $391.8064 $4K
holding Common Shares (2330.TW) -- -- --
holding Common Shares (2330.TW) -- -- --
holding Common Shares (2330.TW) -- -- --
Holdings After Transaction: American Depositary Shares (TSM) — 107 shares (Direct, null); Common Shares (2330.TW) — 11,051 shares (Direct, null); Common Shares (2330.TW) — 145 shares (Indirect, By ESPP Trust)
Footnotes (1)
  1. Each American Depositary Share represents five (5) Common Shares. Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP").
ADS purchased May 19, 2026 10 ADS at 391.8064 per share Open-market purchase, American Depositary Shares (TSM)
ADS purchased May 20, 2026 7 ADS at 400.0000 per share Open-market purchase, American Depositary Shares (TSM)
Total ADS after transactions 107 ADS Directly held following May 20, 2026 purchase
Direct common shares 11,051 shares Direct TSM common share holdings as of May 19, 2026
Indirect family holdings 60 common shares Held by immediate family member, indirect ownership
ESPP trust holdings 145 common shares Common shares purchased and held under ESPP trust
ADS to common ratio 1 ADS = 5 common shares From footnote on American Depositary Shares
Net ADS bought 17 ADS Net open-market purchases reported, Form 4 transactionSummary
American Depositary Shares financial
"Each American Depositary Share represents five (5) Common Shares."
American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.
Employee Stock Purchase Plan financial
"Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP")."
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.
indirect ownership financial
"Common Shares (2330.TW) held with nature of ownership noted as indirect, including by immediate family member and by ESPP Trust."
immediate family member financial
"Nature of ownership is described as "By Immediate Family Member" for 60 common shares."
ESPP Trust financial
"Nature of ownership is listed as "By ESPP Trust" for 145 common shares."
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*
Tien Bor-Zen
(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)
05/19/2026		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)11,051D
American Depositary Shares (TSM)(1)05/19/2026PV10A$391.8064100D
American Depositary Shares (TSM)(1)05/20/2026PV7A$400107D
Common Shares (2330.TW)145(2)IBy ESPP Trust
Common Shares (2330.TW)60IBy Immediate Family Member
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. Each American Depositary Share represents five (5) Common Shares.
2. Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP").
Remarks:
/s/ Jen-Chau Huang, as attorney-in-fact05/21/2026
** 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 transactions did TSM VP Bor-Zen Tien report on this Form 4 for TSM?

Bor-Zen Tien reported buying 17 American Depositary Shares in open-market transactions. He purchased 10 ADS at 391.8064 per share on May 19, 2026 and 7 ADS at 400.0000 per share on May 20, 2026, increasing his direct ADS holdings.

How many TSM American Depositary Shares does Bor-Zen Tien hold after these purchases?

After the reported purchases, Bor-Zen Tien directly holds 107 American Depositary Shares. Each ADS represents five common shares of TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, so these ADS complement his larger direct and indirect common share holdings disclosed in the filing.

What other TSM common share holdings does Bor-Zen Tien report on this Form 4?

As of May 19, 2026, Tien reports direct ownership of 11,051 common shares. He also has indirect holdings of 60 common shares held by an immediate family member and 145 common shares held by an ESPP trust, in addition to his American Depositary Shares position.

How significant are the 17 ADS TSM purchases compared with Bor-Zen Tien’s total holdings?

The 17 ADS purchases are relatively small compared with Tien’s overall stake. He holds 107 ADS after the trades plus 11,051 directly held common shares and additional indirect common share positions, so the new ADS purchases modestly increase an already established ownership base.

What does each TSM American Depositary Share represent according to the Form 4 footnotes?

Each American Depositary Share represents five common shares of TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD. This ratio means Tien’s 107 ADS correspond economically to 535 common shares, separate from his directly and indirectly held common shares reported in the same filing.