Deep Intelligence Across Industries

Hyosung TNC is the world's largest spandex producer, with about 30% of global supply. It sells under the creora brand from plants in China, Vietnam, India, Türkiye, Brazil and Korea. Alongside spandex it makes nylon and polyester filament and runs one of Korea's oldest general trading businesses, which handles steel and chemicals. Since February 2025 it has also owned Hyosung Neochem. Neochem is the world's second-largest producer of nitrogen trifluoride (NF3), a gas used to clean chip and display fabrication chambers, and it sells to Samsung Electronics, SK hynix and display makers. Neochem is the company's direct link to the semiconductor fabrication supply chain. Earnings depend mostly on the spread between spandex prices and raw-material costs. That spread bottomed in 2022–2025, when Chinese capacity was in oversupply, and widened sharply in 2026. The company's strategic agenda has three parts: grow specialty gases, build bio-based materials (a USD 1bn bio-BDO and bio-spandex complex in Vietnam), and reduce debt after the KRW 920bn Neochem acquisition roughly doubled net borrowings. --- ### What the company does Hyosung TNC reports two segments: Textile and Trade & Others. **Textile:** makes spandex (elastane), nylon 6 filament, polyester filament, and the spandex polymer intermediate PTMG (polytetramethylene ether glycol). Revenue is product sales to mills that knit, weave and dye fabric for apparel brands and for hygiene products such as diapers. Spandex supplies nearly all of the segment's profit. Nylon and polyester have swung between losses and break-even for most of the past four years. **Trade & Others:** includes the steel and chemical trading business inherited from Hyosung Mulsan, a tire-cord yarn operation in Dong Nai, Vietnam (Dong Nai Techyarn), and from February 2025 the specialty-gas subsidiary Hyosung Neochem. Neochem makes NF3, fluorine/nitrogen mixtures, chlorine, deuterium (D2), C4F7N and hydrogen chloride. ### Revenue model Almost all revenue comes from selling physical products: fibre, chemical intermediates, specialty gases and traded steel and chemicals. The company has no subscription or licensing income. Trading earns low margins on high volumes and has made up around 60% of revenue but well under a third of operating profit. Textile is the smaller segment by revenue but generates most of the profit. Neochem sells gases and, increasingly, purchased gases to semiconductor and display fabs under supply contracts. ### Value-chain position In spandex the company is unusually integrated. It makes PTMG in-house in China and Vietnam, and from 2026 makes bio-based BDO (1,4-butanediol, the PTMG feedstock) in Vietnam. Its Chinese plants run on coal-derived BDO. This insulated it from the oil-price spike that followed Middle East supply disruption in 2026, while the same spike raised prices of oil-based polyester and nylon and made spandex relatively more attractive to fabric makers. Downstream, the company sells to fabric mills but markets directly to brands such as Lululemon, Nike and H&M so that they specify creora in their garments. ### Customers and end markets | End market | Products | Customer type | |---|---|---| | Activewear, athleisure, swimwear, denim, intimates, hosiery | creora spandex, regen recycled fibres, regen BIO bio-based spandex, nylon and polyester filament | Fabric mills; brand programmes | | Hygiene (diapers) | Spandex for hygiene applications | Personal-care converters | | Semiconductor and display fabrication | NF3 and other specialty gases | Memory and logic chipmakers; display panel makers | | Industrial and automotive | Tire-cord yarn (Dong Nai Techyarn); bio-BDO for TPU, PBAT resin and shoe soles (planned) | Tire makers; plastics converters | | Steel and chemicals distribution | Traded steel products and chemicals | Industrial buyers in Europe, Asia and the Middle East | **Activewear, athleisure, swimwear, denim, intimates, hosiery:** Products: creora spandex, regen recycled fibres, regen BIO bio-based spandex, nylon and polyester filament; Customer type: Fabric mills; brand programmes **Hygiene (diapers):** Products: Spandex for hygiene applications; Customer type: Personal-care converters **Semiconductor and display fabrication:** Products: NF3 and other specialty gases; Customer type: Memory and logic chipmakers; display panel makers **Industrial and automotive:** Products: Tire-cord yarn (Dong Nai Techyarn); bio-BDO for TPU, PBAT resin and shoe soles (planned); Customer type: Tire makers; plastics converters **Steel and chemicals distribution:** Products: Traded steel products and chemicals; Customer type: Industrial buyers in Europe, Asia and the Middle East ### Company description and independent view The company describes itself as a global textile and trading company that has added specialty gases to become a high-value-added materials business. In plainer terms, it is a cyclical commodity-fibre producer with a dominant cost position in spandex, a large low-margin trading arm, and a new, leveraged bet on semiconductor gases. The textile cycle matters far more than anything else to group profit. In 2021, at the peak of the spandex cycle, operating profit was KRW 1.42tn. In 2022 it was KRW 124bn. That swing exceeds any plausible contribution from the gas business.

SK Specialty is the world's largest producer of nitrogen trifluoride (NF3) and tungsten hexafluoride (WF6). NF3 is the dominant chamber-cleaning gas in semiconductor and display fabs, and WF6 is the precursor for tungsten contacts and word-lines in DRAM and 3D NAND. From its integrated complex in Yeongju and an NF3 plant in Jiangsu, China, it runs 13,500 t/yr of NF3, 2,000 t/yr of WF6 and 2,000 t/yr of monosilane (SiH4). Its customers are the Korean memory and display majors, led by Samsung Electronics, SK hynix and LG Display, plus fabs across Asia. Revenue was KRW 749.4 bn in FY2025. After a carve-out in March 2025 it is controlled by Hahn & Co, Korea's largest private-equity firm, and SK Inc. keeps 15%. The company combines scale-driven cost leadership in a concentrated oligopoly with a pipeline of next-node materials: molybdenum precursors, high-purity HF and atomic-layer etch chemistries. Its main exposures are memory-cycle volatility and tungsten and fluorine feedstock security. --- ### Company's own description In its FY2025 business report, SK Specialty describes itself as a company that manufactures and sells specialty gases such as NF3, SiH4 and WF6, used to produce semiconductors, displays and solar cells. It says it ranks first in the world in both production volume and market share for NF3 and WF6. It describes the market as an oligopoly, with competitors characterised as giant multinational chemical companies. Prices are set by negotiation with end users and reflect changes in raw-material and production costs. The company reported no significant product price changes during FY2025. ### Independent characterisation SK Specialty is a single-segment, product-based manufacturer of electronic specialty gases. All revenue comes from selling manufactured gas products. Licensing, subscription and service revenue are immaterial today. Two new service-type businesses are being prepared: an exhaust-gas scrubber service and liquefied-CO2 recycling. The economics rest on three pillars: 1. **Scale and cost position in fluorine chemistry.** NF3 is made by fluorinating ammonia-based intermediates using electrolytically generated fluorine from anhydrous hydrogen fluoride (AHF). WF6 is made by reacting tungsten powder with fluorine or fluorinated gases. Electrolysis, purification to 5N–6N purity and cylinder/ISO-tube logistics are capital-intensive and safety-critical. That favours incumbents with large, fully depreciated cell rooms and long qualification histories. 2. **Qualification lock-in.** A gas is qualified per fab, per tool and per process step. Once qualified, switching costs are high, and supply contracts with memory makers usually run on annual or multi-year volume frameworks. 3. **Proximity to the world's largest memory cluster.** Yeongju is within trucking distance of Samsung's Giheung, Hwaseong and Pyeongtaek sites, SK hynix's Icheon and Cheongju sites, and LG Display's Paju site. ### Revenue model | Revenue type | Share of FY2025 revenue | Notes | |---|---|---| | Product sales: specialty gases | 100% | NF3, WF6, SiH4, DCS, Si2H6, high-purity HF and related gases | | Services (scrubber operation, CO2 recycling) | Not yet revenue-generating | Demo tests with customers were targeted for 1H2026 | | Licensing / royalties | Not material | 30 registered patents are used internally | **Product sales: specialty gases:** Share of FY2025 revenue: 100%; Notes: NF3, WF6, SiH4, DCS, Si2H6, high-purity HF and related gases **Services (scrubber operation, CO2 recycling):** Share of FY2025 revenue: Not yet revenue-generating; Notes: Demo tests with customers were targeted for 1H2026 **Licensing / royalties:** Share of FY2025 revenue: Not material; Notes: 30 registered patents are used internally ### Value-chain position SK Specialty sits in the middle of the chain. Upstream it buys AHF, tungsten powder and silicon powder: KRW 143.7 bn of main raw materials in FY2025, mostly imported and therefore priced in foreign currency. Downstream it sells to device makers (IDMs and foundries) and display-panel makers. In Korea it sells directly. Abroad it sells directly and through trading companies, on telegraphic-transfer (T/T) terms. ### Customer types and end-markets | Customer type | End-market | Products consumed | Comment | |---|---|---|---| | Memory IDMs (DRAM, NAND, HBM) | Semiconductors | NF3, WF6, SiH4, DCS, Si2H6 | The core demand base. SK hynix was about 19% of FY2023 revenue (KRW 129 bn of KRW 681.7 bn). | | Logic and foundry | Semiconductors | NF3, WF6, SiH4 | Served through the Taiwan and China subsidiaries | | Display-panel makers (LCD/OLED) | Displays | NF3, SiH4 | NF3 cleans the large-area CVD chambers used to make displays | | Thin-film PV makers | Solar | SiH4, NF3 | Minor | | Battery-materials makers | Silicon-anode batteries | SiH4 | SiH4 is an emerging feedstock for silicon-carbon anodes | **Memory IDMs (DRAM, NAND, HBM):** End-market: Semiconductors; Products consumed: NF3, WF6, SiH4, DCS, Si2H6; Comment: The core demand base. SK hynix was about 19% of FY2023 revenue (KRW 129 bn of KRW 681.7 bn). **Logic and foundry:** End-market: Semiconductors; Products consumed: NF3, WF6, SiH4; Comment: Served through the Taiwan and China subsidiaries **Display-panel makers (LCD/OLED):** End-market: Displays; Products consumed: NF3, SiH4; Comment: NF3 cleans the large-area CVD chambers used to make displays **Thin-film PV makers:** End-market: Solar; Products consumed: SiH4, NF3; Comment: Minor **Battery-materials makers:** End-market: Silicon-anode batteries; Products consumed: SiH4; Comment: SiH4 is an emerging feedstock for silicon-carbon anodes SK Group affiliates accounted for about 31% of 1H2024 revenue (KRW 108.4 bn of KRW 355.3 bn). Rating agencies describe the fixed customer base of Samsung, LG and SK as high-quality.