Tlb

TLB is a printed circuit board (PCB) specialist founded in 2011 by personnel from Daeduck Electronics, focused mainly on memory module PCBs, SSD PCBs, and PCBs for semiconductor back-end test equipment.

Its principal customers are the three global memory semiconductor majors — Samsung Electronics, SK hynix, and Micron — with the company holding sole or limited-supplier status on a number of items for these clients.

TLB built its business by supplying SSD PCBs to Samsung Electronics' high-end products early on, later expanding its customer base to SK hynix and Micron. The company is understood to hold a leading position in SSD substrate share within Korea's two major memory makers.

Production is based at its Ansan, Gyeonggi Province headquarters plant and a Vietnam subsidiary plant (TLB VINA) that began operating in October 2024, with a second Ansan plant expansion and a new second Vietnam plant currently being pursued in parallel.

Competitors in the memory module PCB market include SIMMTECH and Korea Circuit, while in the broader PCB industry, Daeduck Electronics and ISU Petasys operate in adjacent or overlapping segments.

Recently, the company has concentrated resources on developing and ramping high-value-added new products such as SoCAMM2, the next-generation low-power memory module standard, the CXL next-generation interface, and DDR5-8000.

Its business structure of focusing exclusively on memory module PCBs is cited as a factor behind its technological gap relative to competitors.

Consolidated revenue in 2025 reached KRW 258.5 billion, up 43.6% from KRW 180.0 billion the prior year, while operating profit surged 673.2% to KRW 26.0 billion from KRW 3.36 billion, lifting the operating margin sharply from 1.9% to 10.0%.

Net profit attributable to owners also rose sharply to KRW 19.0 billion from KRW 3.6 billion a year earlier.

This marks a recovery from the trough that followed the 2022 peak (revenue KRW 221.5 billion, operating profit KRW 38.5 billion, operating margin 17.4%), through a downturn in 2023 (revenue KRW 171.3 billion, operating profit KRW 3.0 billion, operating margin 1.8%) and 2024 (operating margin 1.9%).

Operating cash flow, which was negative at KRW -1.5 billion in 2023, improved to KRW 8.2 billion in 2025.

On a quarterly basis, revenue and operating margin rose together for five straight quarters: from KRW 64.0 billion revenue and KRW 6.9 billion operating profit (10.7% margin) in Q2 2025, to KRW 68.9 billion and KRW 8.7 billion (12.6%) in Q3 2025, KRW 72.6 billion and KRW 8.6 billion (11.8%) in Q4 2025, KRW 75.8 billion and KRW 10.7 billion (14.1%) in Q1 2026, and KRW 88.2 billion and KRW 12.8 billion (14.5%) in Q2 2026.

Summed over the most recent four quarters (Q3 2025 through Q2 2026), revenue totaled roughly KRW 305.5 billion and net profit attributable to owners roughly KRW 32.9 billion, with profit scale clearly expanding quarter by quarter.

This trend is attributed to a rising share of high-value products tied to increasing layer counts in server memory modules combined with average selling price increases.

However, the debt ratio climbed to 95.4% in 2025 from 68.1% in 2024 and 56.5% in 2023, indicating that financial structure burden has grown alongside the earnings recovery.

Korea's semiconductor substrate industry is seen by some analysts as being in a structural growth phase driven by rising memory demand tied to AI server investment.

Shin Han Investment analysis has noted that domestic substrate sector average share prices have significantly outpaced both the KOSPI and KOSDAQ indices, alongside an industry view that demand for memory-dedicated substrates will keep growing.

TLB's core end market, server memory modules, is seeing rising layer counts (from 10-12 layers to 14-20-plus layers), increasing the share of high-value products, and Meritz Securities estimated the SoCAMM2-related substrate market could expand roughly four-fold, from KRW 57.9 billion this year to KRW 217.0 billion next year.

One brokerage report ranked the intensity of benefit among module PCB makers as TLB first, followed by Korea Circuit and SIMMTECH, then overseas players.

That said, this up-cycle also carries the structural risk of contracting again during a memory semiconductor downturn, as illustrated by the sharp slowdown seen in 2023-2024.

Competitors SIMMTECH and Korea Circuit are also frequently cited as beneficiaries of the memory substrate super-cycle, and valuation re-rating discussions are ongoing across the sector.

TLB plans to expand overall production capacity by roughly 20-25% through its second Ansan plant, which is set to begin contributing to results in the second half following operation from the end of Q2 2026.

Alongside this, the company raised funds through a KRW 120 billion rights offering combined with a 1-for-1 bonus issue; the rights-offering new shares were listed on July 27, 2026, and the bonus-issue new shares on August 7, 2026.

The proceeds are earmarked for building a second plant at its Vietnam subsidiary and constructing new PCB production lines; that facility, covering the full PCB process, is planned to involve up to KRW 200 billion in capital expenditure through this year and next, with completion targeted for the end of 2027.

However, the new capacity from this expansion is expected to be reflected in revenue mainly from 2028 onward, suggesting the investment carries more significance for the medium- to long-term growth path than near-term results.

On the product side, SoCAMM2 mass production began in Q2 2026, and the company is conducting advance development on next-generation LPDDR6-equipped SoCAMM substrates at the request of certain customers.

TLB is the sole supplier of CXL memory module PCB samples to Samsung Electronics and SK hynix, and whether Samsung's CXL 3.1 mass-production roadmap proceeds as planned is cited as a key point to watch going forward.

Revenue tied to DDR5-8000 is also expanding, with its higher per-unit pricing versus prior generations expected to contribute to average selling price gains.