PER, EPS, PBR and BPS are calculated in-house from the last 4 quarters (2025Q3–2026Q2) · Dividend yield is based on ₩0 per share · Prices as of the 2026-10-02 close
Compound semiconductor package specialist RF Materials has posted improving quarterly results following its 2025 turnaround to profit, driven by expanding optical module and pump-laser package shipments to Lumentum and growth in its defense equipment business.
2025 consolidated revenue reached KRW 64.08bn (+44% YoY) with operating profit of KRW 7.37bn, turning profitable after two straight years of losses
Revenue and operating profit both rose sequentially in Q1 and Q2 2026, with operating margin expanding along the way
A roughly KRW 42bn rights offering in April 2026, with 100% participation by controlling shareholder RFHIC, funded new facility investment
Growing AI data center and CPO-related optical module demand, plus a new plant (targeted completion in Q4 2027 to double capacity), form the core growth drivers
Business diversification is underway via subsidiary RF Systems' defense orders and participation in a national space-semiconductor research program
RF Materials manufactures and sells semiconductor packages that mount compound semiconductors such as indium phosphide (InP), gallium arsenide (GaAs) and gallium nitride (GaN) onto transistors and power amplifiers.
Its main product lines include optical communication packages, RF power transistor packages, laser module packages, and military infrared sensor packages. In 2025, revenue from military equipment components rose 22% year-on-year to KRW 33.6bn, driving overall improvement together with communication packages.
The controlling shareholder is wireless communication equipment maker RFHIC, holding a 41.54% stake as of the securities registration filing date, or 47.04% including related parties.
The company supplies heat-dissipation modules for AI-server optical transceivers and pump-laser packages to Lumentum in the United States, and expanding volumes there have been cited as the key driver of recent earnings improvement.
The defense segment is handled by subsidiary RF Systems, which supplies military equipment components to domestic and overseas defense contractors.
The company was recently selected as a participating institution in a space-aerospace semiconductor strategic research consortium overseen by the Ministry of Science and ICT and ETRI, expanding into space-grade semiconductor packages.
It has also localized cold plate liquid-cooling components, aiming to extend beyond laser modules into AI semiconductor and data center cooling markets.
| Quarter | Revenue | Operating profit | Op. margin |
|---|---|---|---|
| 2025Q2 | ₩16.6B | ₩1.9B | 11.3% |
| 2025Q3 | ₩14.6B | ₩1.9B | 13.0% |
| 2025Q4 | ₩21.1B | ₩2.8B | 13.1% |
| 2026Q1 | ₩20B | ₩3.2B | 16.0% |
| 2026Q2 | ₩25.1B | ₩5.3B | 21.1% |
| Year | Revenue | Operating profit | Net income (parent) | Op. margin | ROE | Debt-to-equity |
|---|---|---|---|---|---|---|
| 2022 | ₩50.4B | ₩2.7B | ₩3.3B | 5.4% | 7.8% | 81.5% |
| 2023 | ₩47.9B | -₩34,626,044 | -₩700M | −0.1% | −1.5% | 61.9% |
| 2024 | ₩44.5B | -₩1.5B | -₩4.8B | −3.3% | −11.7% | 62.5% |
| 2025 | ₩64.1B | ₩7.4B | ₩7.1B | 11.5% | 13.4% | 48.4% |
Consolidated basis (financial statements including subsidiaries) · Final figures from DART filings · Net income attributable to owners of the parent · Data as of 2026-09-04
RF Materials' annual results moved from revenue of KRW 50.44bn and operating profit of KRW 2.73bn (5.4% margin) in 2022, to revenue of KRW 47.91bn with an operating loss of KRW 0.03bn in 2023, and revenue of KRW 44.50bn with an operating loss of KRW 1.45bn in 2024, marking two consecutive years of declining sales and losses; the 2024 owners' net loss deepened to KRW 4.79bn.
In 2025, however, revenue rebounded 44% year-on-year to KRW 64.08bn, operating profit reached KRW 7.37bn (11.5% margin), and owners' net income turned positive at KRW 7.06bn, marking a clear turnaround.
On a quarterly basis, revenue of KRW 16.56bn and operating profit of KRW 1.87bn in Q2 2025 gave way to a seasonal dip in Q3 revenue to KRW 14.59bn while operating profit held at KRW 1.89bn, before Q4 expanded sharply to revenue of KRW 21.13bn, operating profit of KRW 2.77bn, and owners' net income of KRW 4.08bn.
The improvement continued into 2026, with Q1 revenue of KRW 20.02bn and operating profit of KRW 3.20bn, followed by Q2 revenue of KRW 25.06bn and operating profit of KRW 5.29bn, pushing the operating margin to 21.1%, above market expectations; by segment, communication package revenue is estimated to have grown 119.2% year-on-year to KRW 11.7bn and military equipment component revenue grew 17.5% to KRW 10.6bn.
Cumulative owners' net income over the trailing four quarters (Q3 2025 through Q2 2026) reached roughly KRW 12.07bn, far surpassing the scale of the 2024 annual loss. This improvement is attributed largely to operating leverage from expanding shipment volumes to Lumentum exceeding prior expectations.
Expanding global AI data center investment is fast-tracking demand for optical modules and co-packaged optics (CPO) that replace copper wiring inside servers with optical signals, which in turn is lifting demand for pump-laser modules and the packages that house them.
At the same time, U.S.-China tensions are pushing Chinese optical module and telecom equipment makers out of U.S. and European markets, a supply-chain realignment that analysts say could benefit Korean suppliers.
Hana Securities assessed that RF Materials' communication package production utilization remains below 50%, yet viewed the company's continued capacity expansion as evidence of strong underlying customer demand. Other research has similarly estimated utilization in the 30-50% range.
However, some technology majors, including Broadcom on an earnings call, have suggested that copper interconnects may remain in use for scale-up applications longer than expected due to cost considerations, giving rise to a so-called 'CPO too-early' argument within the industry.
In the defense and space sectors, a government-led space-aerospace semiconductor strategic research program with a total budget of roughly KRW 105bn through 2030 is viewed as an opportunity for participating firms to build mid- to long-term technological competitiveness.
RF Materials, together with parent RFHIC, is also exposed to telecom infrastructure investment events such as 5G-SA and 6G spectrum auctions, giving it a business structure sensitive to cycle shifts on both the optical and RF fronts.
The company allocated KRW 25bn of the roughly KRW 42bn raised via its April 2026 rights offering to facility investment, with the remainder earmarked for raw material purchases and production-related working capital.
Of this, KRW 8.2bn is designated for additional purchases of PGC, a key raw material, to be executed sequentially from August 2026 through Q1 2027, while KRW 8.75bn is planned for new plant startup preparation and production stabilization from Q4 2027 through Q4 2030.
Korea Investment & Securities said in a July 2026 report that production capacity is expected to double once the new plant is completed, enhancing the company's ability to meet pump-laser and CPO demand.
The company targets mass production of CPO laser packages starting in 2027 and plans to extend its cold plate technology, built on laser module references, into the AI semiconductor and data center cooling markets.
Controlling shareholder RFHIC's full participation in the rights offering is viewed as a signal of committed management.
In the defense segment, order flow at subsidiary RF Systems and progress in the national space-aerospace semiconductor research program are cited as points to watch for mid- to long-term diversification.
Having moved from consecutive losses in 2023-2024 to a 2025 turnaround and continued quarterly profit improvement into 2026, RF Materials' valuation reference point has shifted substantially from the loss-making period.
The stock trades at a notable premium to net asset value, a level understood to be above the historical trading range seen during the years of weaker performance.
The company currently pays no dividend, limiting its appeal from a yield perspective, and is in a growth-investment phase that prioritizes allocating raised capital toward facility investment and raw material securing.
Hana Securities, in a March 2026 report, maintained a buy rating on RF Materials with a target price of KRW 80,000, assessing that its valuation multiple was low relative to domestic and overseas optical module peers.
Korea Investment & Securities also said in a July 2026 report that it raised its target price citing expanding shipment volumes to Lumentum.
These are the respective views of each institution, however, and future earnings and any re-rating by the market could differ depending on variables such as new plant ramp-up performance and the pace of CPO adoption.
PER, EPS, PBR and BPS are all calculated in-house (the same method as Naver and Toss) · Dividend yield = cash dividend per share from DART filings (supplemented by KRX) ÷ current price · As of 2026-09-04
Rising AI server traffic is boosting demand for optical transceivers and pump-laser packages, with expanding shipment volumes to Lumentum acting as the key driver of recent quarterly earnings improvement. Communication package revenue is estimated to have grown substantially year-on-year again in Q2 2026.
The exclusion of Chinese optical module makers amid U.S.-China tensions is cited as a potential tailwind for domestic suppliers.
Funds raised via the 2026 rights offering were prioritized for facility investment, and the new plant targets completion in Q4 2027 to double production capacity. The company aims for mass production of CPO laser packages in 2027 and is extending its cold plate technology into the cooling market. With utilization currently assessed as low, volume growth could bring operating leverage benefits.
Military equipment component revenue via subsidiary RF Systems is contributing to earnings improvement, growing 22% year-on-year in 2025. Participation in a government-led space-aerospace semiconductor research consortium is expanding the business into new application areas.
Controlling shareholder RFHIC's full participation in the rights offering is viewed as a signal of committed management.
A significant portion of revenue is concentrated among a small number of customers, including controlling shareholder RFHIC and Lumentum, meaning demand shifts at any single customer can directly affect results.
Some technology majors, including Broadcom, have expressed caution about the pace of CPO adoption, leaving uncertainty around the speed of optical module demand growth. Telecom infrastructure investment tends to be influenced by external variables such as policy and spectrum auction timing.
The company has repeatedly relied on external funding, following earlier convertible bond issuances with a roughly KRW 42bn rights offering in 2026. New share issuance can dilute existing shareholders, and additional capital raises could recur if further expansion funding needs arise.
If facility investment outcomes fall short of expectations, questions about the efficiency of raised capital could emerge.
The company posted operating losses in both 2023 and 2024, so a renewed downturn in end-market demand could again weigh on results. Quarter-to-quarter volatility exists, as seen in the seasonal revenue dip in Q3 2025. If new plant ramp-up and CPO mass production do not proceed as planned, it could delay the growth narrative.
A large share of revenue is concentrated among a small number of customers, including controlling shareholder RFHIC and U.S.-based Lumentum. Order fluctuations or inventory adjustments at these customers could directly affect results. Customer diversification has not yet progressed sufficiently.
The company was designated an investment-alert stock in September 2025, and similar exchange actions could recur amid sharp price swings. A stock price that has risen rapidly over a short period can be a source of heightened volatility going forward.
Price fluctuations and supply stability for key raw materials such as PGC could affect the cost structure.
Operating capital execution for new plant startup preparation is planned to continue from Q4 2027 through 2030, and if funds are not deployed as planned or additional financing is needed, financial burden could increase.
As the supply contract for pump-laser packages to Lumentum in the U.S. approaches its expiration, it is worth checking for disclosures on contract renewal or follow-on supply agreements.
The Q3 2026 quarterly report will reveal whether actual revenue and operating profit improved further versus Q2, and whether growth continued across the communication package and military equipment component segments.
It is worth monitoring, via disclosures or IR materials, whether additional raw material purchases (August 2026 through Q1 2027) and new plant construction progress are proceeding as planned.
This is the targeted timing for new plant completion and doubled production capacity, so it is important to confirm actual startup and progress on CPO laser package mass production.
RF Materials returned to profit in 2025 after consecutive losses in 2023-2024, and has continued to expand revenue and operating profit on a quarterly basis into 2026.
The key driver has been expanding optical module and pump-laser package shipment volumes to Lumentum in the United States, complemented by growth in subsidiary RF Systems' defense business.
The company secured funding for new plant expansion and its CPO business through a large 2026 rights offering, targeting completion of the new plant in Q4 2027 to double production capacity.
However, revenue concentration among a small number of customers, dilution concerns from repeated external financing, and the earnings volatility evident in its past loss history are factors that warrant continued attention.
Differing industry views on the pace of CPO adoption also exist, making it important to continue tracking new plant ramp-up and new business progress. This report is provided for informational purposes and does not constitute a buy or sell recommendation.
Report written 2026-09-05 · Data as of 2026-09-04
This content is AI analysis of market data and web search results, provided for information only. It is not a solicitation or recommendation to invest. Investment decisions and their consequences are the investor's own responsibility. Data may be delayed or contain errors.