TSM VP buys 51 common shares via ESPP plan

TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD VP Bor-Zen Tien reported routine share purchases and updated holdings.

Rhea-AI Filing Summary

TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD VP Bor-Zen Tien reported routine share purchases and updated holdings. On 2026-05-08, indirect accounts bought 7 and 44 Common Shares (2330.TW) at $71.82 per share through open-market transactions executed under the company’s Employee Stock Purchase Plan (ESPP).

After these transactions, indirect holdings were 60 and 145 Common Shares, while direct holdings were 90 American Depositary Shares (each representing five Common Shares) and 9,051 Common Shares. The Form 4 shows a net purchase of 51 Common Shares across these ESPP-related transactions.

Insights

Insider trading analyst

VP Bor-Zen Tien recorded small, plan-based net share purchases.

The filing shows two open-market purchase entries totaling 51 Common Shares (2330.TW) at $71.82 per share, attributed to an ESPP trust and an immediate family member. Footnotes state these were made under the issuer’s Employee Stock Purchase Plan pursuant to predetermined terms.

Because the trades are ESPP-driven and relatively small versus reported direct holdings of 9,051 Common Shares and 90 American Depositary Shares, they appear as routine compensation and savings activity rather than a discretionary directional bet. The filing reports no derivative exercises and no sales.

Insider Trade Summary

Net Buyer: 51 shares

Net Buy 4 txns

Insider Tien Bor-Zen

Role VP

Bought 51 shs ($4K)

Type	Security	Shares	Price	Value
Purchase	Common Shares (2330.TW)	44	$71.82	$3K
Purchase	Common Shares (2330.TW)	7	$71.82	$502.74
holding	Common Shares (2330.TW)	--	--	--
holding	American Depositary Shares (TSM)	--	--	--

Holdings After Transaction: Common Shares (2330.TW) — 145 shares (Indirect, By ESPP Trust); Common Shares (2330.TW) — 60 shares (Indirect, By Immediate Family Member); Common Shares (2330.TW) — 9,051 shares (Direct); American Depositary Shares (TSM) — 90 shares (Direct)

Footnotes (5)

1. F1. Each American Depositary Share represents five (5) Common Shares.
2. F2. 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.
3. F3. 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.
4. F4. Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP").
5. F5. Common Shares purchased by the administrator of the issuer's Employee Stock Purchase Plan ("ESPP") on behalf of the filer's Immediate Family Member, who is a TSMC employee, pursuant to terms predetermined by the issuer.

Key Figures

Common shares purchased (ESPP/family): 51 shares Purchase price: $71.82 per share Direct common share holdings: 9,051 shares +3 more

6 metrics

Common shares purchased (ESPP/family) 51 shares Net open-market purchases on May 8, 2026 under ESPP

Purchase price $71.82 per share Common Shares (2330.TW) open-market transactions

Direct common share holdings 9,051 shares Common Shares (2330.TW) held directly after transactions

ADS holdings 90 ADS American Depositary Shares after transactions, each equals five Common Shares

Indirect ESPP trust holdings 145 shares Common Shares held indirectly by ESPP trust after purchase

FX rate used NT$31.429 to US$1 Translating NT$2,257.1777 average price into US dollars

Key Terms

American Depositary Shares, Employee Stock Purchase Plan, Immediate Family Member, open-market purchase, +1 more

5 terms

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 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.

Immediate Family Member financial

"on behalf of the filer's Immediate Family Member, who is a TSMC employee"

open-market purchase financial

"transaction_action": "open-market purchase""

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.

indirect ownership financial

"ownership_type": "indirect""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did TSM (TSM) VP Bor-Zen Tien report on May 8, 2026?

VP Bor-Zen Tien reported two open-market purchases totaling 51 Common Shares (2330.TW) on May 8, 2026, at $71.82 per share. These transactions were executed under Taiwan Semiconductor’s Employee Stock Purchase Plan through an ESPP trust and an immediate family member account.

At what price did the TSM insider purchase Taiwan Semiconductor common shares?

The reported purchases of Taiwan Semiconductor common shares were made at $71.82 per share. A footnote explains this reflects an average purchase price of NT$2,257.1777, translated using an exchange rate of NT$31.429 to US$1 under the Employee Stock Purchase Plan.

How many Taiwan Semiconductor shares did TSM VP Bor-Zen Tien hold after the reported Form 4 transactions?

After the transactions, the Form 4 shows direct holdings of 9,051 Common Shares and 90 American Depositary Shares, plus indirect holdings of 60 and 145 Common Shares. Each American Depositary Share represents five Common Shares, according to the filing’s footnote disclosure.

Were Bor-Zen Tien’s TSM share transactions discretionary buys or plan-based purchases?

The purchases were plan-based under Taiwan Semiconductor’s Employee Stock Purchase Plan. Footnotes state the ESPP administrator bought Common Shares on predetermined terms for the filer and an immediate family member, indicating routine program participation rather than ad hoc trading decisions in the open market.

Does the TSM Form 4 show any stock option exercises or share sales by Bor-Zen Tien?

The Form 4 does not show any derivative exercises or sales by Bor-Zen Tien. Transaction summaries indicate two non-derivative open-market purchases, no sales, and no option exercises, tax-withholding dispositions, gifts, or restructuring-related movements in this particular filing.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 05/11/2026 - 07:27 AM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED 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)

HSINCHU TAIWAN 300096

(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)

	Director		10% Owner
X	Officer (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)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Shares (2330.TW)								9,051	D
American Depositary Shares (TSM)(1)								90	D
Common Shares (2330.TW)	05/08/2026(2)		P	V	44	A	$71.82(3)	145(4)	I	By ESPP Trust
Common Shares (2330.TW)	05/08/2026(5)		P	V	7	A	$71.82(3)	60	I	By 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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Each American Depositary Share represents five (5) Common Shares.

2. 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.

3. 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.

4. Common Shares purchased and held under the issuer's Employee Stock Purchase Plan ("ESPP").

5. Common Shares purchased by the administrator of the issuer's Employee Stock Purchase Plan ("ESPP") on behalf of the filer's Immediate Family Member, who is a TSMC employee, pursuant to terms predetermined by the issuer.

Remarks:

	/s/ Jen-Chau Huang, as attorney-in-fact	05/11/2026
	** Signature of Reporting Person	Date
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)