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SG (formerly Seoul Ascon) is a KOSDAQ-listed construction materials company whose core business is the manufacture and sale of asphalt concrete, diversified into road paving construction, construction equipment rental, and ready-mix concrete.

The company operates multiple asphalt plants across the greater Seoul metropolitan area and is known as Korea's largest asphalt concrete producer.

Its key competitive edge is Eco Steel Asphalt Concrete, an environmentally friendly, patented product made by recycling steel slag generated during iron-ore smelting, offering higher durability than conventional asphalt while reducing use of natural aggregate.

Raw-material slag is sourced domestically from POSCO and, overseas, through a ten-year agreement for roughly 42 million tons of steel slag with Ukraine's largest steelmaker, Metinvest Group.

Its main customers are local governments and the Public Procurement Service on the public side and private construction firms on the private side, and it has recently begun supplying product to industrial-complex sites such as SK Hynix's Yongin semiconductor cluster.

A partial lifting of the SME-only sector protection rule in 2025 opened the public asphalt procurement market that the company had previously been barred from entering.

Overseas, building on a 2024 partnership with POSCO International, SG has established a Ukraine subsidiary (SG Ukraine) and an Indonesia joint venture targeting road infrastructure demand tied to Ukraine's reconstruction and Indonesia's new capital relocation.

In a domestic market fragmented among numerous regional small and mid-size asphalt producers, SG stands out as a mid-cap player with the scale to pursue both overseas expansion and large public and private contracts.

SG's consolidated revenue fell from KRW 89.86 billion in 2022 to KRW 80.92 billion in 2023, rose to KRW 118.94 billion in 2024, then declined again to KRW 102.25 billion in 2025.

Operating profit swung from a small gain of KRW 0.57 billion (0.6% margin) in 2022 to losses of KRW -13.47 billion (-16.6%) in 2023 and KRW -6.07 billion (-5.1%) in 2024, before returning to a slim KRW 0.75 billion (0.7%) profit in 2025.

Net income attributable to owners, however, has remained negative for four straight years — KRW 3.01 billion in 2022 followed by KRW -29.73 billion in 2023, KRW -35.66 billion in 2024 and KRW -2.15 billion in 2025 — showing that the operating-line recovery has not yet fully translated into bottom-line improvement.

On a quarterly basis, 2025 Q2 was solid with revenue of KRW 35.14 billion, operating profit of KRW 2.15 billion and net income of KRW 3.57 billion, but 2025 Q3 revenue fell to KRW 21.98 billion and operating profit swung back to a loss of KRW -2.33 billion.

Q4 2025 improved to revenue of KRW 30.85 billion and operating profit of KRW 3.36 billion, yet net income was KRW -6.26 billion, suggesting one-off items below the operating line.

Q1 2026 showed a pronounced seasonal dip with revenue of only KRW 8.95 billion, an operating loss of KRW -6.04 billion and a net loss of KRW -9.92 billion, before Q2 2026 rebounded to revenue of KRW 23.03 billion, operating profit of KRW 0.69 billion and net income of KRW 1.34 billion.

On the balance sheet, the debt ratio improved steadily from 266.9% in 2023 to 168.3% in 2024 and 119.6% in 2025. Still, 2025 operating cash flow was negative at KRW -28.54 billion despite the operating profit, pointing to significant cash absorbed by inventory and contract-related working capital.

Korea's asphalt and road-paving industry is heavily driven by central and local government SOC budgets, road maintenance demand, and the intensity of environmental regulation.

Public asphalt procurement had long been restricted mainly to small firms under the SME-only sector protection system, but a partial lifting of this rule in 2025 opened public-tender participation to mid-size players such as SG.

Expanded government support for air-pollution abatement facilities is also cited as a favorable backdrop for SG's proprietary emissions-reduction equipment business.

Looking abroad, large-scale road infrastructure demand tied to Ukraine's reconstruction and Indonesia's capital relocation to Nusantara is emerging as a new growth axis, and it is unusual for a domestic asphalt producer to gain direct access to overseas SOC markets of this scale.

Both overseas markets, however, carry execution uncertainty tied to political variables such as the pace of Russia-Ukraine ceasefire negotiations and the speed of local permitting and joint-venture progress.

Competitively, the domestic market remains fragmented among many regional small producers, giving SG a relative edge in scale and eco-friendly slag-asphalt technology, but the industry's fortunes remain tied to the broader construction cycle and SOC budget swings.

Through 2026, SG has been conducting multiple rounds of capital raising to fund growth investment.

The company has stated that proceeds from its ongoing rights offering will be directed toward expanding production capacity in the greater Seoul area, overseas investment including Indonesia, and securing raw materials, and it reported that CEO Park Chang-ho subscribed to 120% of his entitled shares in the offering on September 4.

Overseas, on September 2 the company announced it would pursue roughly 960 kilometers of road infrastructure projects in Indonesia, including roads connecting to the new capital of Nusantara, through its joint venture with POSCO International.

On the Ukraine business, of the KRW 4.2 billion earmarked for the local subsidiary's capital injection in a 2024 rights offering, only about KRW 0.7 billion had actually been disbursed by the end of June 2026, and the company aims to raise cumulative capital injection to KRW 9.1 billion by year-end, making the pace of actual execution a key point to watch.

Domestically, reports of Eco Steel Asphalt Concrete being supplied to industrial-complex sites such as SK Hynix's Yongin semiconductor cluster point to potential demand growth beyond public contracts into private industrial-complex projects.

The company itself has noted that further capital raising through the securities market remains possible if earnings improvement does not materialize, meaning the success of the current offering hinges on whether expanded domestic capacity and the Ukraine and Indonesia businesses actually translate into revenue and cash generation.