SK

SK Inc. is the operating holding company of the SK Group; on a standalone basis it runs IT services and digital businesses plus portfolio management, while most revenue comes from consolidated subsidiaries.

The consolidation scope includes SK Innovation in energy and chemicals, SK Telecom in wireless, intermediate holding company SK Square which owns the semiconductor stake, SK Ecoplant which has pivoted from construction and environment toward semiconductor infrastructure, and SK Networks, SKC and SK Biopharmaceuticals.

Segment revenue mix is not available from confirmed filings, so no figures are cited here, but the bulk of sales appears to come from energy and chemicals, telecom, and the recently fast-growing semiconductor infrastructure construction business.

Through unlisted subsidiaries the group supplies engineering, procurement and construction plus integrated power and water infrastructure solutions for semiconductor fabs and clusters, and Samsung Securities noted that once new fab investment in Yongin, Cheongju and the southwestern region ramps up, most early spending lands in construction and infrastructure.

SK Ecoplant posted first-half 2026 consolidated revenue of KRW 10tn and operating profit of KRW 1.465tn, up 82.8% and 584.1% year on year, with high-tech revenue up 53.7%, gas and materials up 139.5% and asset lifecycle up 239.2%.

In April 2026 SK Inc. bought shares held by financial investors to lift its SK Ecoplant stake from 66.7% to 71.2%, positioning the unit as an infrastructure player linking fab and AI data center construction, industrial gases and materials, and semiconductor module and e-waste recycling.

By contrast, semiconductor materials assets held directly by the holding company are being divested: after specialty gases, control of wafer operations was also transferred, totalling roughly KRW 5tn of semiconductor-related assets, which is read as a reassessment of efficiency asset by asset rather than direct ownership.

Competition is defined less by operations than by capital allocation, with LG, Samsung C&T, Hanwha, CJ and Lotte Holdings compared on dividends, treasury shares and net asset value discounts.

The annual trajectory shows a clear decline followed by a reversal.

Revenue fell three years running, from KRW 134.55tn in 2022 to KRW 131.24tn in 2023, KRW 124.69tn in 2024 and KRW 122.70tn in 2025, while operating profit shrank faster: KRW 8.00tn (5.9% margin), KRW 5.06tn (3.9%), KRW 2.36tn (1.9%) and KRW 1.82tn (1.5%).

Net profit attributable to owners swung from losses of KRW 0.78tn in 2023 and KRW 1.29tn in 2024 to a KRW 1.60tn profit in 2025, with total consolidated net profit of KRW 3.56tn. Operating cash flow fell from KRW 11.35tn in 2023 to KRW 6.10tn in 2025, moving in the same direction as operating profit.

Quarterly data illustrate the volatility: second-quarter 2025 revenue of KRW 30.14tn with operating profit of just KRW 0.20tn, third quarter KRW 31.04tn and KRW 0.83tn, fourth quarter KRW 30.29tn and KRW 0.39tn, with a KRW 2.25tn net loss attributable to owners in the fourth quarter of 2025.

The picture then flipped: first-quarter 2026 revenue of KRW 36.75tn, operating profit of KRW 3.67tn and owners' net profit of KRW 3.38tn, followed by second-quarter revenue of KRW 42.20tn, operating profit of KRW 4.84tn and owners' net profit of KRW 5.96tn, lifting quarterly operating margins into the 10-11% area.

Net profit exceeding operating profit reflects equity-method gains from affiliates on top of consolidated operations, consistent with SK hynix reporting record second-quarter 2026 revenue of KRW 79.32tn and operating profit of KRW 60.54tn, figures that were prepared before the external auditor completed its review and therefore preliminary.

On the balance sheet, liabilities of KRW 127.83tn against equity of KRW 85.69tn brought the debt-to-equity ratio down from 170.9% in 2022 to 149.2% in 2025, yet KRW 60.50tn of that equity belongs to non-controlling interests versus KRW 25.19tn for owners, so a large share of consolidated profit still accrues to minority shareholders.

Holding company share prices are driven less by their own results than by subsidiary values, discounts to net asset value and shareholder return policies.

In a January 2026 report SK Securities calculated that the combined NAV discount of the nine holding companies it covers stood at 51.9%, close to the post-2020 low of 49.8%, with individual discounts as of the 14 January close at 59.0% for SK, 51.0% for LG, 60.8% for Hanwha, 49.6% for SK Square and 55.4% for Samsung C&T.

The same broker put SK's NAV discount at 53.5% in materials dated late August 2026.

The end-market driver is AI infrastructure spending: the Korea Data Center Council estimates the domestic private data center market growing from about KRW 3.9tn in 2022 to roughly KRW 10.2tn by 2028, with about 75% of the 64 facilities under construction or planned opening between 2026 and 2028.

On 29 June 2026 the SK Group announced plans to build a total of 15GW of AI data center capacity. SK Telecom launched SK Hyper, a dedicated data center development entity, committing KRW 750bn through 2030 to secure sites and shared infrastructure such as substations and transmission lines.

That said, memory pricing and capital spending, the engine of this cycle, have reversed sharply many times before, and because they reach the holding company amplified through equity-method accounting, sensitivity runs both ways.

Differentiation among peers comes down to where divestment cash is redeployed: SK said it will use the KRW 2.3tn from the SK Siltron sale as funding for high-bandwidth memory, energy and data center investment, whereas Doosan gains front-end wafer manufacturing through the same deal, strengthening its semiconductor and advanced materials competitiveness.

The largest confirmed items on the calendar are asset sales and shareholder returns. SK Inc. contracted to sell 47,322,350 SK Siltron shares, or 70.6%, to Doosan for KRW 2.3tn, with closing scheduled for 31 January 2027 and a clause allowing additional payments tied to future earnings.

Under that earn-out, if SK Siltron's EBITDA exceeds set thresholds between 2027 and 2034, SK receives 40% of the excess adjusted for its former stake. Because closing is still pending, the proceeds have not yet been received.

On returns, both policy and execution plans are on the table: the company sets an annual minimum dividend per share and, using gains from asset sales, buys back and cancels treasury shares or pays additional dividends equivalent to 1-2% of market capitalisation.

SK Securities noted that of the 24.8% treasury stake, KRW 4.8tn worth, or 20.3%, is due to be cancelled in January 2027. The same broker forecast 2026 consolidated operating profit of KRW 13.4tn, a 638% year-on-year increase.

Key earnings variables include SK Ecoplant's high-tech contribution from SK hynix orders in the second half and the pace at which its KRW 25.4tn order backlog as of end-June is converted, along with the second-half production ramp of HBM4, which SK hynix began shipping in volume in the second quarter.

At its second-quarter investor briefing, the company framed the period through 2025 as portfolio rebalancing, 2026 onward as core competitiveness reinforcement and post-2027 as capital structure optimisation.