As of June 30, 2015
| Company | Location | Business | Ownership |
|---|---|---|---|
| SK hyeng Inc. | Korea | Domestic subsidiary | 100.00 |
| SK hystec Inc. | Korea | Domestic subsidiary | 100.00 |
| Siliconfile Technologies Inc. | Korea | Development and manufacturing of electronic component | 100.00 |
| SK hynix America Inc.(SKHYA) | U.S.A. | Overseas sales subsidiary | 97.74 |
| Hynix Semiconductor Manufacturing America Inc. (HSMA) | U.S.A. | Discontinued subsidiary | 100.00 |
| SK hynix U.K. Ltd.(SKHYU) | U.K. | Overseas sales subsidiary | 100.00 |
| SK hynix Deutschland GmbH(SKHYD) | Germany | Overseas sales subsidiary | 100.00 |
| SK hynix Asia Pte.Ltd.(SKHYS) | Australia | Overseas sales subsidiary | 100.00 |
| SK hynix Semiconductor India Private Limited(SKHYIS) | India | Overseas sales subsidiary | 100.00 |
| SK hynix Semiconductor HongKong Ltd.(SKHYH) | Hong Kong | Overseas sales subsidiary | 100.00 |
| SK hynix Japan Inc.(SKHYJ) | Japan | Overseas sales subsidiary | 100.00 |
| SK hynix Semiconductor Taiwan Inc.(SKHYT) | Taiwan | Overseas sales subsidiary | 100.00 |
| SK hynix Semiconductor (Shanghai) Co.,Ltd.(SKHYCS) | China | Overseas sales subsidiary | 100.00 |
| SK hynix Semiconductor (China) Ltd.(SKHYCL) | China | Overseas manufacturing subsidiary | 100.00 |
| SK hynix Semiconductor (Wuxi) Ltd.(SKHYMC) | China | Overseas manufacturing subsidiary | 100.00 |
| SK hynix Semiconductor (Chongqing) Ltd. (SKHYCQL) | China | Overseas manufacturing subsidiary | 100.00 |
| SK APTECH Ltd. (SKAPTECH) | Hong Kong | Holding company | 100.00 |
| SK hynix(Wuxi) Semiconductor Sales Ltd.(SKHYCW) | China | Overseas sales subsidiary | 100.00 |
| SK hynix Italy S.r.l. (SKHYIT) | Italy | Overseas R&D center | 100.00 |
| SK hynix memory solutions Inc. (SKHMS) | U.S.A. | Overseas R&D center | 100.00 |
| SK hynix Flash Solution Taiwan Ltd. (SKHYFST) | Taiwan | Overseas R&D center | 100.00 |
| Softeq Flash Solutions LLC.(SOFTEQ) | Belarus | Overseas R&D center | 100.00 |
| MMT (Money Market Trust) | Korea | Money Market Trust | 100.00 |