2025 4Q Results Presentation

‌FY 2025 Results Mar. 2026

1

‌Financials

2

3

4

Market Fundamental Industry Outlook Plant Operation

2

Agenda

‌Financial Status

(Unit: NTD Million)

16.8%

Sales Breakdown By Segment

0.6%

7.0%

75.6%

Refinery Olefin

Utility Others

QoQ

• Refinery -12.4 %

• Olefin -11.7 %

• Utilities -12.1 %

3

‌Market Fundamentals

FPCC vs. Singapore complex margin

Dubai Crude vs. Product Differentials

Source: Reuters, ICIS,IHS, company data

(US$/BBL)

Jet Fuel/Kero Gasoline

Fuel Oil

Diesel Naphtha-MOPJ

Base Oil 150N

50

45

40

35

30

25

20

(US$/BBL)

Singapore Complex Margin 4Q $15

25

20

15

10

5

0

FPCC Export Raw Material Margin

15

10

5

0

-5

-10

-15

FPCC's Olefin Spread

(US$/KT)

Ethylene

Propylene

Butadiene

1,000

800

600

400

200

0

4

2025/2026 Global Capacity Additions

‌Industry Outlook- Refinery

Source: IEA, PIRA, company research

Unit: KB/D

Americas

-573

Middle East 413

Africa 230

Europe & Russia

-377

China 170

Asia 418

India 331

Japan

-208

others 125

5

2025/2026 Global Ethylene Capacity Additions

‌Industry Outlook-Olefin

Source: CMA

Asia Capacity Additions

(KTA)

7,000

6,800

6,600

6,400

6,441

(KTA)

9,500

7,500

5,500

3,500

1,500

(500)

6,907

504

6,021

6,200

6,000

5,800

5,600

5,400

420

6,021

2025 2026

Asia Russia

2025 2026

China SouthKorea Indonesia Australia

6

‌Utilization Rate

100%

90%

Plant Operation

85%

90%

80%

70%

78% 76% 76%

71%

78%

62%

78%

60%

50%

40%

53% 57%

47%

58% 59%

53%

59%

1Q24 2Q24 3Q24 4Q24 1Q25 2Q25 3Q25 4Q25

Schedule Maintenance

Refinery Olefins

7

‌Disclaimer

This document has been prepared by Formosa Petrochemical Corporation ("FPCC" or the "Company") solely for meetings with potential investors

The information contained in this document has not been independently verified. No representation or warranty express or implied is made as to, and no reliance should be placed on, the fairness, accuracy, completeness or correctness of such information or opinions contained herein. None of the Company nor any of its respective affiliates, advisers or representatives shall have any liability whatsoever (in negligence or otherwise) for any loss howsoever arising from any use of this document or its contents or otherwise arising in connection with this document

This document does not constitute an offer or invitation to purchase or subscribe for any securities in the Company and neither any part of it shall form the basis of or be relied upon in connection with any contract or commitment whatsoever. Any decision to purchase securities in the offering should be made solely on the basis of the information contained in the Offering Circular

included in this document contain forward-looking statements and information relating to the Company. The Company has generally identified forward-looking statements by the use of terms such as "may", "might", "will", "expect", "intend", "plan", "estimate", "anticipate", "believe" or similar words or phrases. The Company bases these statements and financial information on its beliefs as well as its assumptions made using information currently available to it.

Because these statements and financial information reflect the Company's current views concerning future events, these statements and financial information necessarily involve risks, uncertainties and assumptions. Actual future performance could differ materially from these forward-looking statements and financial information. The Company does not undertake to release the results of any revisions of forward-looking statements and financial information to reflect future events or circumstances. The Company cautions investors not to place undue reliance on these forward-looking statements. All written and oral forward-looking statements attributable to the Company or persons acting on the Company's behalf are qualified in their entirety by these cautionary statements

No part of this document may be distributed, reproduced or transmitted to any third party

Thank you

8