Issuer Summary: KOGAS / Korea Gas Corporation

Date prepared: 2026-05-13

1. Business Snapshot and Recent Developments

KOGAS, meaning Korea Gas Corporation in this report, is a government-related LNG and natural gas wholesale infrastructure issuer at the core of Korea’s natural gas supply system. It is neither a normal private-sector gas distributor nor a pure overseas resource-development company. KOGAS imports LNG from overseas, regasifies it at receiving terminals, stores and sends it out, and supplies it wholesale to city gas companies and power plants through a nationwide pipeline network. The first credit question is how far this institutional indispensability and expected government support can absorb LNG procurement prices, foreign exchange movements, suspension of tariff adjustments, under-recovered amounts, impairments on overseas resource-development assets, and heavy financial debt.

KOGAS was established in August 1983 under the Korea Gas Corporation Act. According to its official Introduction, the company was established to improve public convenience and welfare through the supply of natural gas, and its main businesses include the construction of LNG terminals and gas supply pipeline networks, LNG import, regasification, and stable supply to city gas companies and power plants. As of December 2025, its nationwide pipeline network extended to 5,346km. As of December 2022, it supplied natural gas to 216 cities/counties and 19.99 million households, with a nationwide household penetration rate of 85.4%. KOGAS is a policy issuer responsible for the wholesale infrastructure behind Korea’s city-gas and power-generation natural gas supply, and its credit quality is closely linked not only to ordinary demand fluctuations but also to government tariff and energy policy.

The most recent change in 2025 was that operating profit remained high, while net income fell sharply due to valuation losses on overseas assets. In the audited consolidated financial statements for 2025, revenue was KRW 35,727bn, operating profit was KRW 2,101bn, and net income was KRW 132bn. Yonhap reported on 2026-02-26 that KOGAS reflected KRW 666.9bn of asset impairments related to overseas gas exploration projects in Australia and Mozambique. The audit report also explains that an impairment loss of KRW 424.38bn was recognized for Mozambique Area 4 Offshore, due to factors including lower long-term oil price assumptions and a higher discount rate.

This profit decline does not mean that the domestic gas supply franchise has been impaired in the same way. Domestic gas wholesale supply remains institutionally essential, and the tariff-setting framework includes mechanisms intended to recover supply costs, raw material costs, and a guaranteed return. At the same time, the sharp decline in net income highlights the risk of treating KOGAS simply as “stable because it has government support.” Domestic regulated-business tariffs and receivables, impairments in overseas resource development, refinancing of financial debt, and foreign-currency LNG procurement all sit within the same consolidated issuer, and standalone credit quality is constrained by this combination of risks.

On the KOGAS official IR Information board checked as of the preparation date of this report, 2026-05-13, the latest earnings material was Results of 2025 4Q, dated 2026-02-26. FY2026 Q1 earnings could not yet be confirmed on the official IR board and are therefore not incorporated in this report. Accordingly, this report uses the FY2025 audited financials and S&P’s bond-rating commentary dated 2026-05-06 as its reference point.

2. Industry Position and Franchise Strength

KOGAS’s business base is supported less by price competitiveness or brand power than by institutional indispensability. Korea has high dependence on energy imports, and natural gas is relevant to city gas, power generation, industrial fuel, heating, and energy security. KOGAS imports LNG from overseas producers, receives and regasifies it, and supplies it wholesale through its pipeline network. The official Natural Gas Business System shows the flow by which LNG is imported from overseas producers and then, through KOGAS’s wholesale process, unloaded, stored, compressed, vaporized, and sent out before reaching pipeline networks, supply management stations, power plants, city gas companies, and ordinary households, offices, and factories.

This position gives KOGAS high franchise value. The 2025 GMTN offering circular describes KOGAS as the only company engaged in wholesale natural gas supply in Korea and one of the world’s largest LNG importers. The same document states that natural gas supply volume was 34.1 million tons in 2024 and 11.9 million tons in January-March 2025, and that the natural gas supplied by KOGAS in 2024 accounted for about 20.1% of Korea’s primary energy consumption. As of end-2024, it had five receiving terminals and a 5,206km pipeline network, and KOGAS intends to expand its processing and storage capacity and pipeline network. The 5,346km figure on the official Introduction page as of December 2025 indicates that the network has continued to expand.

However, institutional strength should not be equated with stable margins. Demand for power generation is affected by the fuel mix of KEPCO generation subsidiaries, the operation of nuclear, coal, and renewable generation, the electricity market framework, and relative fuel prices. The SGX GMTN offering circular identifies as risk factors that KEPCO generation subsidiaries account for a substantial portion of KOGAS’s revenue, that KEPCO held 20.5% of KOGAS’s shares as of 2025-03-31, and that some KEPCO generation subsidiaries have begun directly importing LNG for their own consumption. KOGAS’s public role strengthens expectations of government support, but government policies on tariffs, prices, and support for low-income groups can constrain margins and the timing of cash collection.

3. Regulatory Framework, Tariff and Receivables

The most important point in KOGAS credit analysis is that the tariff system is both the basis for long-term cost recovery and a constraint on short-term cash flow. According to the 2025 GMTN offering circular, MOTIE determines the unit supply margin at the beginning of the year after consultation with MOEF and KOGAS. This supply margin is calculated based on the target sales volume, supply costs such as depreciation, selling and administrative expenses, and personnel costs, and a guaranteed return. KOGAS adds this unit supply margin to unit raw material costs, which include LNG costs, transportation costs, insurance, taxes, and provisions to recover under-collected amounts, to calculate the Formula Price. In terms of system design, the structure is intended to recover reasonable supply costs, raw material costs, and a guaranteed return.

This mechanism is a significant credit support. If the system functions normally, even if LNG prices or exchange rates rise, raw material costs can be passed through into selling prices, and KOGAS can recover supply costs and a certain return. It is not sufficient to read a normal corporate gross margin or operating margin directly as KOGAS’s operating-performance indicator. The GMTN offering circular also explains that when raw material costs rise, gross margin and operating margin decline, and therefore are not useful as operating-performance measures in the same way as for ordinary companies.

However, the tariff system does not provide fully automatic or immediate recovery. The government reserves the authority to suspend regular adjustments to selling prices. When LNG prices or the won exchange rate fluctuate significantly and policy objectives to ease inflation or household burden strengthen, MOTIE has suspended the bimonthly adjustment of selling prices charged to city gas companies. During periods of suspension, amounts that KOGAS would have been able to recover based on the Formula Price but could not bill are recorded as current or non-current non-financial assets depending on the expected timing of recovery. These are recognized in accounting terms as assets recoverable in the future, but they have not yet been received in cash. Under-collected amounts are therefore a key item that separates earnings from cash flow.

The GMTN offering circular explains that past adjustment suspensions significantly reduced KOGAS’s net cash inflow and increased borrowings, while cumulative amounts of KRW 5,341bn were recovered between February 2013 and October 2017. If the system functions, under-collected amounts can be recovered over time, but recovery can take several years, leaving a burden on borrowings and liquidity in the interim. The same issue remains in the most recent period. The same document states that, of under-collected amounts as of end-March 2025, KRW 3,133bn was expected to be recovered within one year and KRW 11,945bn after more than one year. The audited FY2025 financial statements also show current non-financial assets of KRW 2,885bn and non-current non-financial assets of KRW 12,209bn at end-2025, confirming the importance of balances related to natural gas sales tariff settlement gains and losses in Note 12.

It is also important that the audit report identified the “accuracy of measurement of natural gas sales tariff settlement gains and losses” as a key audit matter. Settlement gains and losses can become large due to differences between the estimated oil prices, exchange rates, and supply volumes reflected in government-approved tariffs and actual outcomes, while suspension of the raw material cost pass-through mechanism for residential use also makes the balance of under-collected non-financial assets significant. The calculation process is complex and the impact on the financial statements is material.

For bond investors, the conclusion of this section is straightforward. KOGAS’s tariff system is an institutional recovery mechanism that supports the company’s credit quality. In the short term, however, government policy on prices, household burden, and industry can halt tariff adjustments and increase under-collected amounts and borrowing. Therefore, when assessing KOGAS’s earnings, it is necessary to look not only at revenue and operating profit, but also at non-financial assets, operating cash flow, financial debt, and the government’s stance on tariff adjustments.

4. Segment Assessment

KOGAS’s business segments are broadly divided into domestic gas introduction and sales, and other businesses including overseas resource development, maintenance and engineering, and LNG-related services. In credit analysis, the domestic gas wholesale business should be placed at the center of repayment capacity and government support expectations, while other businesses should be treated as supplementary earnings sources and also as sources of impairment and capital-consumption risk.

In the 2025 segment data, the gas introduction and sales business had revenue of KRW 34,018bn, operating profit of KRW 1,792bn, and total assets of KRW 50,086bn. Other businesses had revenue of KRW 3,194bn, operating profit of KRW 294bn, and total assets of KRW 11,958bn. After eliminating intersegment transactions, the consolidated total was revenue of KRW 35,727bn, operating profit of KRW 2,101bn, and total assets of KRW 53,628bn. The bulk of revenue and assets is in the gas introduction and sales business, and the center of the company’s credit quality is the domestic gas wholesale system.

The gas introduction and sales business has both earnings stability and policy burdens. Demand from city gas companies and for power generation is basic, and the tariff system provides a path for cost recovery. At the same time, this business is directly exposed to LNG prices, USD/KRW, adjustment suspensions, receivables, support for low-income groups, and the power-generation fuel mix. In 2025, lower wholesale gas prices and increased subsidies for low-income groups were reported as factors behind lower operating profit, showing that policy objectives can pressure earnings even in a domestic regulated business.

Other businesses support KOGAS’s technical base and overseas procurement strategy, but need to be viewed cautiously from a credit perspective. Overseas resource-development and LNG projects, including KOGAS Canada, KOGAS Australia, KOGAS Iraq, KOGAS Badra, and Mozambique-related interests, may contribute over the long term to supply-source diversification and resource security. However, they are affected by oil and gas prices, reserves, development costs, partners, geopolitics, operating delays, and impairment testing. The decline in 2025 net income is exactly an example of this overseas-business risk appearing in consolidated earnings.

This segment structure is also why KOGAS should not be treated simply as a gas version of KEPCO. KEPCO is centered on transmission and distribution, electricity sales, power purchase costs, generation subsidiaries, and the electricity tariff system. KOGAS is centered on LNG import, storage, regasification, wholesale supply, raw material cost pass-through, under-collected amounts, and overseas resource-development investment. Both are Korean energy quasi-sovereigns, but their deterioration paths differ.

By segment, the domestic gas wholesale business is the support for credit quality, while other businesses are a variable factor that constrains the upper end of the assessment. Bondholders should not look only at domestic-business stability and understate overseas impairments, but they should also not look only at overseas impairments and underestimate the institutional importance of the domestic business. KOGAS is an issuer in which these two characteristics coexist.

5. Financial Profile and Analysis

KOGAS has strong market access as a government-related utility, while its standalone balance sheet is heavy. In 2025, total liabilities declined and operating cash flow increased, but net income fell sharply due to impairments, and tariff settlement-related assets and financial debt remain large. It is therefore insufficient to describe FY2025 simply as “bad results,” or to conclude that there is no issue because operating cash flow was strong. Earnings, cash flow, under-collected amounts, financial debt, and government support need to be assessed together.

Revenue declined from KRW 44,556bn in 2023 to KRW 38,389bn in 2024 and KRW 35,727bn in 2025. Because wholesale natural gas prices are linked to international energy prices, changes in revenue do not necessarily indicate changes in demand volume or franchise strength. Operating profit improved to KRW 3,003bn in 2024 and then declined to KRW 2,101bn in 2025. Net income was limited to KRW 132bn in 2025, with overseas resource-development impairments and financial expenses having a major impact. Even if overseas resource-development impairments are non-cash losses, they reduce capital and leave questions about investment discipline and future earnings prospects.

Operating cash flow of KRW 6,539bn in 2025 is an important support for KOGAS’s credit quality. Even though operating profit declined, cash from operating activities increased from KRW 3,630bn in 2024. This shows that working capital and settlement items have a significant effect on cash flow. However, increased operating cash flow alone should not lead to a conclusion that liquidity is sufficient. Current financial liabilities at end-2025 were KRW 13,381bn, while non-current financial liabilities were KRW 21,802bn. Cash and cash equivalents of KRW 1,147bn are small relative to short-term financial liabilities. KOGAS is an issuer that continues refinancing with support from high ratings and expected government support; it is not an issuer that absorbs short-term debt with cash alone.

The scale of non-financial assets should also not be overlooked. At end-2025, current non-financial assets were KRW 2,885bn and non-current non-financial assets were KRW 12,209bn, and assets related to tariff settlement gains and losses are large. These have a character of being recoverable in the future under the institutional framework, but the timing of recovery depends on policy decisions. Financial expenses are also a constraint, with 2025 financial expenses of KRW 2,318bn large relative to operating profit. High ratings reduce funding costs, but because the absolute amount of financial debt is large, changes in interest rates, foreign exchange, and foreign-currency bond-market conditions have cumulative effects.

In assessing the financial profile, the decline in total liabilities at end-2025 should be viewed positively, while the decline in net income, overseas impairments, current financial liabilities, non-financial assets, and financial expenses should remain constraints. KOGAS has strong credit support including government support, but its standalone financial profile is that of a refinancing-based utility dependent on the tariff system and market access. Even when operating cash flow improves, it is necessary to confirm whether tariff recovery and debt reduction continue for several years.

6. Government Linkage and Bondholder Structural Considerations

KOGAS has strong government linkage. For bondholders, however, the most important point is to separate government linkage into several layers. First, there are public shareholders and a policy mission. Second, there is a support route to operating revenue through the tariff system and regulatory supervision. Third, there is the likelihood of extraordinary government support incorporated by rating agencies. Fourth, under the KOGAS Act, there is institutional room for the government to guarantee KOGAS bonds. Fifth, there is the contractual fact of whether an individual bond actually has a government guarantee. These five points are similar, but they are not the same.

According to the 2025 GMTN offering circular, as of 2025-03-31, the Korean government directly and indirectly held 46.7% of KOGAS’s outstanding shares, and local governments held a further 7.9%. The document explains that the government has historically influenced KOGAS’s strategy, operations, and management, and is likely to continue to do so. This government linkage lowers default risk through the public nature of natural gas supply, the tariff system, policy finance, capital-market access, and explicit support if needed, while public-policy objectives may not always align with KOGAS’s standalone commercial interests.

At the same time, government linkage does not automatically turn bondholder rights into Korean government obligations. In the English translation of the Korea Gas Corporation Act by KLRI, Article 14(3) states that the government may guarantee repayment of principal and interest on bonds issued by KOGAS. However, the 2025 GMTN offering circular clearly identifies “Notes are not guaranteed by the Republic of Korea” as a risk factor and explains that no government guarantee is provided for the Notes under the program. In other words, the government can guarantee bonds under certain conditions, but the GMTN Notes referenced in this report are not guaranteed by the Korean government.

Subsidiary and guarantee structures also need to be checked. Under the SGX GMTN program, Notes can be issued by KOGAS itself or by subsidiaries that have acceded to the program, and Notes issued by subsidiaries can be guaranteed by KOGAS on a senior basis. Therefore, it is essential to confirm whether the investment target is a bond issued by KOGAS itself, a Guaranteed Issuer bond with a KOGAS guarantee, a bond with a government guarantee, or an unsecured senior bond. Expected government support is credit support at the issuer level, not a substitute for individual bond guarantee provisions or recovery ranking.

Given this government linkage, KOGAS’s default risk cannot be explained by standalone financials alone. The government has a strong incentive to maintain the company’s function, and ratings reflect this. At the same time, when assessing spreads, expected loss on individual bonds, liquidity, and relative value, investors need to incorporate both the strength of expected government support and the fact that ordinary debt is not direct government debt.

7. Capital Structure, Liquidity and Funding

KOGAS’s funding is supported by access to domestic and overseas bond markets, high ratings, expected government support, and Korea’s policy-finance ecosystem. At end-2025, financial liabilities were KRW 13,381bn current and KRW 21,802bn non-current, totaling KRW 35,184bn. Cash and cash equivalents were KRW 1,147bn, and the balance sheet is clearly refinancing-based. KOGAS should not be viewed as a company that holds large cash balances and repays debt with cash, but rather as an issuer that manages funding through tariff recovery, operating cash flow, domestic and overseas bond issuance, and bank borrowings while maintaining high ratings and market access.

Operating cash flow of KRW 6,539bn in 2025 is an important element that eases short-term debt pressure. However, compared with current financial liabilities of KRW 13,381bn, one year of operating cash flow is not sufficient to absorb the full amount. If tariff adjustment suspension is prolonged, non-financial assets will increase, cash inflow will be delayed even if accounting operating profit remains, and additional borrowings or bond issuance will be required. Conversely, if recovery of under-collected amounts progresses, operating cash flow will improve and there will be room to reduce financial debt.

KOGAS’s foreign-currency funding and LNG procurement are also important. LNG procurement contracts are mainly denominated in US dollars, and won depreciation increases the burden of raw material costs and foreign-currency debt. The Formula Price is intended to reflect raw material costs and exchange rates, but if the pass-through timing is delayed or the government suspends adjustments to selling prices, KOGAS bears the funding burden first. For foreign-currency bonds, it is necessary to confirm hedging, debt by currency, maturity distribution, and the issuer and guarantor of each bond, but this report treats the detailed currency-by-currency maturity table as not yet obtained.

The SGX 2025 GMTN program is an important indication of KOGAS’s funding access. The program limit is USD 11bn, and KOGAS or acceded subsidiaries can issue senior Notes in multiple currencies. On 2026-05-06, S&P assigned an AA rating to KOGAS’s Australian dollar-denominated senior unsecured notes, placing the rating at the same level as the issuer credit rating. However, the terms of each issue, maturity, currency, swaps, listing market, investor demand, and use of proceeds need to be checked separately, and this report does not verify live spread or pricing data.

For liquidity assessment, the practical approach is to view KOGAS as an issuer whose cash balance alone is thin, but whose market access and expected government support are substantial. Short-term liquidity depends not only on cash, but also on the domestic bond market, bank borrowings, policy finance, foreign-currency bonds, tariff recovery, and the government’s stance. If credit quality deteriorates rapidly, it is likely to appear before operating profit and loss in under-collected amounts, short-term financial liabilities, foreign-currency funding conditions, rating comments, and the government’s tariff stance.

8. Rating Agency View

KOGAS’s official ratings page lists overseas ratings of S&P AA, Moody's Aa2, and Fitch AA-, and domestic ratings of KR AAA, KIS AAA, and NICE AAA. The latest assessment year for the overseas ratings is 2025 in each case, and the five-year history also shows S&P AA, Moody's Aa2, and Fitch AA- being maintained. This indicates that KOGAS’s issuer credit quality is positioned at a high level as a Korean quasi-sovereign.

S&P’s bond-rating commentary dated 2026-05-06 places KOGAS’s bonds at the same level as the issuer rating and views the likelihood of government support for the company as extremely high. KOGAS’s business is essential to Korea’s natural gas supply, and government influence, public-policy importance, the tariff system, and importance to energy security support the rating. The rating-agency view reinforces why KOGAS should not be assessed solely on standalone financials.

However, rating agencies’ assessment of government support is not a contractual government guarantee. A rating is an assessment of default risk and incorporates the likelihood and capacity of the government to provide support. The legal recovery rights of a bond, by contrast, follow the issuer, guarantor, contractual terms, governing law, and payment ranking. Therefore, an S&P AA rating cannot be read as meaning the bond is guaranteed by the Korean government.

When using KOGAS’s ratings in this report, the rating agencies’ assessments should not be substituted for the analysis. Ratings provide a guide to the credit level including government support. The core of the report is to separate why support expectations are strong, how far that support can absorb standalone tariff, receivables, impairment, and debt risks, and what guarantees exist for individual bonds.

9. Credit Positioning

Within Korean quasi-sovereigns, KOGAS is positioned as an energy infrastructure issuer with high expected government support. However, the directness of support is one step below the Korean sovereign and policy banks such as KDB and KEXIM, while the weight of government supplementation in its standalone business risk is larger than for ordinary private-sector utilities. When comparing KOGAS with KEPCO, KNOC, KHNP, and others, grouping them simply as energy quasi-sovereigns is insufficient; tariff systems, commodity prices, asset impairments, legal guarantees, customer mix, and financial debt need to be separated.

Compared with the Korean sovereign and policy banks, KOGAS has strong expected government support, but it is not the government itself. KDB/KEXIM have high directness of support as policy financial institutions. KOGAS, as physical infrastructure for energy supply, bears business risks including the tariff system, LNG procurement, working capital, and overseas impairments. Compared with KEPCO, KEPCO is centered on electricity tariffs, purchased power costs, and transmission and distribution investments, while KOGAS is centered on LNG wholesale supply, raw material cost pass-through, under-collected amounts, and overseas resource-development impairments. Compared with KNOC, KOGAS has a stronger domestic regulated-tariff infrastructure character, while KNOC is more sensitive to oil development, stockpiling, upstream assets, and oil prices.

When using KOGAS for an investment decision, it is necessary to compare live spreads with same-maturity Korean sovereigns, KDB/KEXIM, KEPCO, KNOC, and other Asian quasi-sovereigns. This report does not verify market data and therefore does not conclude whether the bonds are cheap or rich. Qualitatively, KOGAS is a defensive Korean energy quasi-sovereign, but unlike policy banks, it should be positioned as an issuer carrying tariff, under-collected-amount, LNG, and overseas impairment risks.

10. Key Credit Strengths and Constraints

The greatest support for KOGAS’s credit quality is the difficulty of substituting its role in Korea’s natural gas supply. LNG import, receiving, regasification, storage, pipelines, and wholesale supply to city gas companies and power plants are directly connected to daily life and industrial activity. This public-policy importance, public ownership, tariff-setting framework for cost recovery, high ratings, and capital-market access including the GMTN program support credit quality including government support.

At the same time, standalone credit quality is constrained by tariff adjustment suspension and under-collected amounts, financial debt and interest payments, impairments on overseas resource-development and LNG-related investments, and the distinction between expected government support and explicit guarantee. The tariff system provides a basis for cost recovery, but the government can suspend adjustments due to prices, household burden, and policy objectives. At end-2025, current and non-current financial liabilities totaled more than KRW 35tn, and valuation losses on overseas gas exploration projects significantly pressured net income. For individual bond investment, it is necessary to separately confirm expected government support, KOGAS guarantee, government guarantee, collateral, subordination, and contractual terms.

Taken together, KOGAS has very strong credit quality including support, while the upper end of its standalone financial assessment is constrained by under-collected amounts, financial debt, overseas impairments, and policy-driven tariff restraint. Bondholders should value the low default risk while seeking compensation in relative value for tariff-system lags and the presence or absence of government guarantees.

11. Downside Scenarios and Monitoring Triggers

The most realistic downside scenario is a combination of rising LNG prices, won depreciation, and suspension of tariff adjustments. If LNG procurement costs and transportation costs rise, USD/KRW worsens, and MOTIE suspends city-gas tariff adjustments as a household and inflation measure, KOGAS will have a recovery right under the Formula Price but will not be able to recover it in cash. Under-collected amounts will accumulate as non-financial assets, operating cash flow will weaken, and reliance on short-term borrowings and bond issuance will increase. The GMTN materials’ explanation that past adjustment suspensions reduced net cash inflow and increased borrowings shows that this channel is realistic.

The second downside is a case in which recovery of under-collected amounts is delayed politically or institutionally. Under-collected amounts are recorded as accounting assets, but if the pace of recovery is slow, financial debt remains high. If tariff normalization is delayed due to inflation, elections, household burden, or consideration for industrial competitiveness, KOGAS may remain in a state where standalone financials struggle to improve despite continued support expectations.

The third downside is additional impairment on overseas resource-development and LNG projects. In 2025, impairments related to overseas gas exploration projects significantly pressured net income. Impairment is not a cash outflow in the period, but it constrains the upper end of standalone credit quality through capital capacity, future earnings, investment discipline, and the risk of further impairment. If lower long-term oil and gas price assumptions, higher discount rates, weaker reserve assessments, project delays, partner risk, and geopolitical risk overlap, additional impairments could arise and affect investor confidence.

The fourth downside is deterioration in the refinancing environment. KOGAS has access to domestic and overseas markets because of its high ratings and expected government support, but it depends on short-term financial liabilities and foreign-currency bond funding. If a downgrade of the Korean sovereign, higher global rates, weaker Korean credit-market supply-demand conditions, sharp USD/KRW moves, and geopolitical risks overlap, refinancing costs will rise and financial expenses will pressure operating profit.

The fifth downside is a reassessment of expected government support. If government ownership declines, the credibility of the tariff system weakens, under-collected amounts are left unresolved for a long period, government guarantees become more ambiguous, KOGAS’s policy importance declines, or Korean sovereign credit deteriorates, the market could reassess KOGAS as a higher-risk quasi-sovereign than before. The probability is not high in normal periods, but because KOGAS bonds are not government-guaranteed bonds, changes in support expectations can be reflected in spreads.

The highest-priority items to review in the next update are 2026 Q1 earnings, tariff revision status, changes in under-collected amounts, operating cash flow, current financial liabilities, and whether there were additional overseas impairments. As of 2026-05-13, Q1 materials could not yet be confirmed on the official IR board, so once those materials are released, it will be necessary to check whether the improvement in operating cash flow seen in 2025 is continuing and whether the impairment impact on net income remains one-off.

12. Credit View and Monitoring Focus

KOGAS’s current credit quality is very high as a Korean energy quasi-sovereign including government support, but on a standalone basis it is constrained by tariff adjustment suspensions, under-collected amounts, overseas impairments, and heavy financial debt. The credit direction has positive elements in that total liabilities declined and operating cash flow increased at end-2025, but because net income fell sharply due to overseas impairments and tariff settlement-related assets and short-term financial liabilities remain large, the standalone view is limited to confirmation of gradual improvement. The probability of a rapid change in the credit level or direction is not high in normal conditions, but if LNG prices, won depreciation, tariff adjustment suspensions, additional impairments, and a deterioration in Korea’s sovereign rating overlap, standalone financials and market spreads could weaken over a short period.

This credit view is supported by KOGAS’s difficult-to-substitute role in Korea’s natural gas wholesale supply, substantial public ownership and government involvement, the tariff system’s framework for cost recovery and guaranteed returns, and high ratings of S&P AA, Moody's Aa2, and Fitch AA-, which support market access. If KOGAS’s functions stopped, the effects would spread to city gas, power generation, households, industry, prices, and energy security. The government has a strong incentive to maintain the company’s credit, and expected government support should be central to the default-risk assessment.

At the same time, the constraints on standalone financials are clear. At end-2025, financial liabilities were KRW 13.4tn current and KRW 21.8tn non-current, while cash was only KRW 1.1tn. Operating cash flow improved to KRW 6.5tn, but it is not enough to cover short-term financial liabilities on a standalone basis. Current and non-current non-financial assets totaled KRW 15.1tn and include a large amount of tariff settlement-related under-collected amounts. These have an institutional basis for future recovery, but the timing of cash conversion depends on policy decisions.

For bond investors, the most important point is to treat KOGAS as an issuer that is strong including support, but is not a government-guaranteed bond issuer. Under Article 14(3) of the Korea Gas Corporation Act, the government may guarantee repayment of principal and interest on bonds issued by KOGAS, but the SGX GMTN materials clearly state that the Notes are neither obligations of, nor guaranteed by, the Korean government. Expected government support is central to default-risk assessment, but recovery and covenant protection must be checked in the terms of each bond. Therefore, for individual bond investments, it is necessary to confirm the issuer, KOGAS guarantee, government guarantee, ranking, currency, maturity, collateral, cross default, and change-of-control provisions.

For investment use, KOGAS has lower directness of support than the Korean sovereign or KDB/KEXIM, but it is a defensive core energy quasi-sovereign alongside KEPCO and KNOC. However, KOGAS-specific incremental risks are LNG procurement, tariff pass-through lag, under-collected amounts, overseas asset impairments, and foreign-currency funding. Live spreads, OAS, and comparisons with same-maturity Korean sovereigns, KDB, KEXIM, KEPCO, and KNOC have not been checked in this report, so it does not conclude whether the bonds are cheap or rich. For relative-value judgment, market data should separately confirm how much compensation is being offered for the tariff system and under-collected amounts, the presence or absence of government guarantee, and uncertainty around overseas impairments, against the stability of a high-rated quasi-sovereign.

Going forward, monitoring should prioritize 2026 Q1 and subsequent earnings, tariff revisions, under-collected amounts, current and non-current non-financial assets, operating cash flow, current financial liabilities, overseas impairments, GMTN issuance terms, S&P/Moody's/Fitch support assessments, and Korea’s sovereign rating. KOGAS’s credit quality is strong including government support, but normalization of the standalone financial profile can only be confirmed if tariff recovery and debt reduction continue.

13. Short Summary & Conclusion

KOGAS is a core government-related natural gas infrastructure issuer responsible for Korea’s LNG imports, receiving terminals, regasification, storage, nationwide pipelines, and wholesale supply to city gas companies and power plants. Expected government support, the tariff system, and high ratings strongly support credit quality, while standalone financials are constrained by tariff adjustment suspensions, under-collected amounts, overseas resource-development impairments, and heavy financial debt. In investment decisions, KOGAS should be valued highly as a Korean energy quasi-sovereign, but ordinary debt should not be confused with government-guaranteed bonds, and tariff recovery, current financial liabilities, overseas impairments, and guarantee provisions of individual bonds need to be monitored continuously.

14. Sources

• KOGAS official Introduction page: https://www.kogas.or.kr/site/eng/1010100000000
• KOGAS official Natural Gas Business System page: https://www.kogas.or.kr/site/eng/1030601000000
• KOGAS official IR Information board: https://www.kogas.or.kr/site/eng/goBoard.do?Key=1050103000000&boardNo=82&pageIndex=1&pageOffset=0&searchKey=&searchValue=
• KOGAS official Credit rating page: https://www.kogas.or.kr/site/eng/1050104020000
• KLRI, Korea Gas Corporation Act, Article 14(3): https://elaw.klri.re.kr/eng_mobile/ganadaDetail.do?hseq=42766&key=KOREA+GAS+CORPORATION+ACT&param=K&type=abc
• Korea Gas Corporation FY2025 consolidated audit report, filed 2026-03-23: https://cdn.financialreports.eu/financialreports/media/filings/15412/2026/RNS/15412_rns_2026-03-23_f82bf7f9-595a-47ab-b28f-3821b7b9208a.html
• KRX/DART FY2025 annual report HTML, filed 2026-03-23: https://kind.krx.co.kr/external/2026/03/23/001414/20260323006197/11011.htm
• SGX, KOGAS 2025 GMTN Update Offering Circular, dated 2025-06-23: https://links.sgx.com/FileOpen/KOGAS%202025%20GMTN%20Update%20-%20Offering%20Circular%20%28dd%2023.06.25%29.ashx?App=Prospectus&FileID=66508
• S&P Global Ratings, Korea Gas Corp. proposed Australian dollar-denominated senior unsecured notes rated AA, 2026-05-06: https://www.spglobal.com/ratings/en/regulatory/article/-/view/type/HTML/id/3557168
• Yonhap News Agency, KOGAS 2025 net plunges 88.5 pct on asset valuation losses, 2026-02-26: https://en.yna.co.kr/view/AEN20260226009851320

15. Unverified / Pending

• FY2026 Q1 earnings were not yet visible on the official KOGAS IR Information board as of this report's 2026-05-13 check. They should be reviewed after posting.
• Live bond prices, spreads, OAS, CDS, same-maturity Korean sovereign, KDB, KEXIM, KEPCO and KNOC comparisons were not available in this workspace and are not used for a relative-value conclusion.
• Detailed currency-by-currency debt maturity, hedge ratio, committed bank lines and unused facilities were not fully extracted. These should be checked before a bond-specific investment decision.
• Specific pricing supplements and final terms for individual KOGAS notes were not reviewed. Confirm issuer, KOGAS guarantee, government guarantee language, ranking, negative pledge, cross default, change of control, governing law, listing venue, currency and maturity before investing in a specific issue.
• Moody's and Fitch full rating reports after the latest official KOGAS rating page update were not reviewed. The report uses the public rating table and S&P 2026-05-06 note.
• Latest city gas tariff notices, post-FY2025 recovery schedule for under-collected amounts and any new MOTIE/MOEF policy changes should be checked in the next update.