Slide 1: 2025.1Q Earnings Briefing
2025.1Q 실적발표 EARNINGS BRIEFING May 2025
Slide 2: Disclaimer
BRAS] Hoot OftS B71 Slot DISCLAIMER AH QLICt. L = BI TAp Ag HHS | At 2 2 ApS/At2| 42 a Ch, fo} (K-IFRS)O4] thet SA |Z aayeHa ot XpwoQ| WS Bee = SALSA? BREFLICH. SABE FASS! SAPAatol] Chol HH Seo AHO] ATHO] SUlA-EEM Ab aA AHO!
Slide 3: Net debt and net debt dependence
순차입금 순차입금 의존도 12.0 39% 39% 39% 45% 35% 40% 10.0 29% 28% 35% 8.0 30% 25% 6.0 11.0 11.0 10.5 20% 9.5 4.0 8.1 15% 6.9 10% 2.0 5% 0.0 0% 1Q24 2Q24 3Q24 4Q24 1Q25 FY20 FY21 FY22 FY23 FY24 1Q25
Slide 4: SK materials subsidiaries share exchange
62.1% → 65.9% 트리켐/레조낙/제이엔씨/퍼포먼스 현물출자 · 포괄적 주식교환 (‘25.12.2 완료 예정) SK SK SK SK머티리얼즈 SK머티리얼즈 에센코어 에어플러스 트리켐 레조낙 제이엔씨 퍼포먼스
Slide 5: 1Q25 consolidated results
△3.7% △72.8% +49.1% 1.24 △36.3% 0.61 △70.5% 0.47 +442.6% 18.86 +12.1% 0.62 적자전환 0.02 적자전환 0.50 △20.0% 0.32 +415.6% 0.35 +382.9% 4.47 △0.4% 0.50 +14.0% 0.44 +15.9% 2.08 △21.2% 0.02 - 0.00 - 0.40 +10.0% △0.07 - △0.13 - 2.06 +26.7% 0.06 - 0.07 - 0.08 +12.5% 0.01 +100% 0.01 - 0.48 △4.2% 0.04 - 0.04 △25.
Slide 6: 1Q25 results: SK siltron EBITDA
1Q25 agaa a st : SK#ES 2025.10 EARNINGS BRIEFING sR. DH AY AW BY Beh Apel S| x|Co|/= si wafer nha HA S| chy] A Sr} LTA J] BF Cro SS SIS Bt SAFE HA AL Oil pep oftI| AAA s|= AA — SKHE® EBITDA — @ Highlights Tetel : Yoel] . ” . 2 Ha2tH| o Si Wafer EHO] S7/GHOLf, SiC Wafer ZtOy ZAz = 8Yo|o1 183 HZ (YoY
Slide 7: 1Q25 results: SK materials EBITDA
1Q25 AMAIA oS : SK Inc. HE|z|Iaa cIC 2025.10 EARNINGS BRIEFING sR. — SK HEl2|/42% CIC EBITDA @ Highlights 22H tate) -weten us = Yeo a 0 ASAE SiS Ae Sa, U7 REZE|S Sch B NAb JA SS Sl OHA (voy +14.0%), YYO]2! (YoY +31.4% 27 28 29 29 o6 + Precursor : Al} 1243} Hioy Shc} 3! Bj AB Oe BAS +014 @r| ; 7 6 +
Slide 8: 1Q25 results: CGT business
pe SK Inc. 2025.1 EARNINGS BRIEFING std . a CGT OHS Sth FR Als S Sa — SKBEIz Yolo] — A34 A40 A55 A58 A70 1024 2024 3024 4Q24 1025 1025 1024 YoY 4024 Qoa One 238 172 +38,3% 264 A9.8% sHolo} A40 ATO AALS 434 MAIS EBITDADHE = A1.3% A25.2% +23.9%p 0.8% A2.1%p % SKA AAS SAF Us 71Zo|| Olah Arasi Rony, Zar
Slide 9: (YoY +6.9%) (YoY +4.7%p)
(YoY +6.9%) (YoY +4.7%p) 47 27 29 24 1
Slide 10: Appendix: quarterly results by subsidiary
_ [Appendix] 2Q HAA AES|AE 7] Hi Al een ma 2025.1 EARNINGS BRIEFING pe SK Inc. SKMR cIC SKHES SK C&C 2% SKHE|2| SX CIC SHY EBITDA EBITDA Margin one Beolo} EBITDA EBITDA Margin ones BeYol2} EBITDA EBITDA Margin 1022 2Q22 3022 4Q22 FY22 1023 2Q23 83 22 27 32% 555 119 219 39% 412 11 32 8% 102 33 38 37%
Slide 11: Thank You
THANK YOU 2025.1Q EARNINGS BRIEFING SK Inc.