T.S.M.C. — AGM Information 2021

Oct 21, 2021

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Taiwan Styrene Monomer Corporation

1[st] Extraordinary General Meeting for FY2021 Meeting Agenda

(Summary Translation)

The 1[st] Extraordinary General Meeting for FY2021 Meeting Agenda (the

“Meeting”) of Taiwan Styrene Monomer Corporation (the “Company”) will be convened at No.311, Chi-Hsien 1st Road, Kaohsiung, Taiwan

(HOWARD PLAZA HOTEL KAOHSIUNG) at 9:30 a.m. on Thursday, October 14, 2021.

1. The agenda for the Meeting is as follows:

   • (1) Call Meeting to Order

   • (2) Chairman’s Remarks

   • (3) Directors Election

Election of the 15[th] Board of Directors (including Independent Directors)

• (4) Discussion Item

Release the directors and their representatives from non-competition Restrictions

• (5) Extemporary Motions

(6) Meeting Adjourned

1. Pursuant to Article 209 of the Company Act, it is proposed to submit the general meeting for resolution the proposal of releasing the noncompetition restrictions for Directors.

2. During COVID-19 epidemic period, shareholders are encouraged to make use of the electronic voting through STOCKVOTE platform of Taiwan Depository & Clearing Corporation (https://www.stockvote.com.tw) during the period from September 29, 2021 to October 11, 2021. If shareholders want to attend in person, please wear a mask all the time and temperature check is required before entering the venue. If shareholder’s forehead temperature is above

37.5°C or ear temperature is above 38°C, a shareholder would not be allowed to enter into the meeting.

Board of Directors Taiwan Styrene Monomer Corporation