Teng-Yueh Tsai - 13 Mar 2026 Form 3 Insider Report for CHIPMOS TECHNOLOGIES INC (IMOS)

Reporting relationship
Executive Vice President
Issuer ticker
IMOS
Reported as of
13 Mar 2026
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 3 source fields
SEC form
3
Accepted by SEC
13 Mar 2026, 06:06:26 UTC
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Hsiu-Ling Teng, attorney-in-fact

Key filing fact

Teng-Yueh Tsai filed Form 3 for CHIPMOS TECHNOLOGIES INC (IMOS) on 13 Mar 2026.

Key facts

  • This page summarizes Teng-Yueh Tsai's Form 3 filing for CHIPMOS TECHNOLOGIES INC (IMOS).
  • 0 reported transactions and 0 derivative rows are listed below.
  • Accepted by SEC: 13 Mar 2026, 06:06.

Change

  • No earlier filing in this sequence is available for direct comparison.
  • Current net transaction value: $0.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0002114129 Primary reporting owner

Tsai Teng-Yueh

Relationship
Executive Vice President
Address
C/O NO 1 R&D ROAD 1, HSINCHU SCIENCE PARK, HSINCHU, TAIWAN
Signature
/s/ Hsiu-Ling Teng, attorney-in-fact
Signature date
13 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

IMOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
272,572
Date
13 Mar 2026
Ownership
Direct
IMOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
820,000
Date
13 Mar 2026
Ownership
Yung Hsiang Investment Co., Ltd.
Footnotes
F1
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Teng-Yueh Tsai serves as the representative and director of Yung Hsiang Investment Co., Ltd.

SEC remarks

Exhibit List: Exhibit 24 - Power of Attorney

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