DEEP RESEARCH · ZARAM TECHNOLOGY
Zaram Technology: 2025-2027 earnings estimates and the fabless transition
A review of the 0.9W XGSPON moat, 25GS-PON commercialization, and the automotive semiconductor option
0. Bottom line first
My read is that Zaram Technology has not lost structural competitiveness in 2025. It is passing through a technology death valley as it moves toward 25GS-PON and automotive semiconductors. The key question is whether 25GS-PON samples, field tests, and initial production orders in the first half of 2026 convert into revenue.
Official fact: The source reports 2024 consolidated revenue of KRW 22.17 billion and operating profit of KRW 360 million. For the first nine months of 2025, revenue was KRW 7.89 billion and operating loss was KRW 4.9 billion. R&D expense for the first nine months of 2025 was KRW 7.31 billion, equal to 92.68% of revenue.
Interpretation: The disappearance of KRW 12.54 billion of 2024 XGSPON service revenue, 56.59% of total revenue, created an earnings gap. But if the 0.9W low-power XGSPON Stick and RISC-V design capability remain intact, the 2025 loss looks more like transition spending for next-generation products than undisciplined cost growth.
1. Identity and technical moat
Zaram Technology was founded in January 2000 as a communications equipment and software company and has evolved into a non-memory semiconductor fabless company. Its core is proprietary CPU architecture and telecom SoC design. The business is divided into XGSPON SoC and XGSPON Stick, optical transceivers, GigaWire, tollgate terminal chips, and digital voice recorder semiconductors.
0.9W
The source says Zaram's XGSPON SoC operates around 0.9W, compared with typical 2.0-3.0W consumption for Broadcom, Intel/MaxLinear, and MediaTek chipsets.
Below 2.0W
The SFP+ ONU Stick has limited physical space, so thermal control is a survival condition. Low power becomes a barrier for 10G upgrades without replacing the chassis.
RISC-V
The RISC-V base reduces ARM licensing and flexibility constraints while supporting customer customization and expansion into automotive semiconductors and AI processors.
2. The 2024 profit year and the 2025 valley
2024 was unusual because XGSPON service revenue drove the return to profit. The source interprets this revenue as a large NRE or initial license from a specific customer, likely Customer A. Before follow-on production arrives, that revenue can leave a gap, and the first nine months of 2025 show that gap.
| Item | Source figure | Meaning |
|---|---|---|
| 2024 revenue | KRW 22.17bn | XGSPON service revenue drove results |
| 2024 operating profit | KRW 360mn | Returned to profit |
| 2024 XGSPON service revenue | KRW 12.54bn, 56.59% of revenue | Possible NRE or initial license |
| 9M 2025 revenue | KRW 7.89bn | Sharp decline year over year |
| 9M 2025 operating loss | KRW 4.9bn | Loss widened with R&D concentration |
| 9M 2025 R&D | KRW 7.31bn, 92.68% of revenue | Investment in 25GS-PON and automotive chips |
| Liquidity assets | About KRW 23.7bn | More than 2-3 years of R&D runway at KRW 1.5-2.0bn quarterly burn |
| Convertible bonds | KRW 33.0bn, refixed at KRW 37,322 | More a dilution overhang than a near-term repayment pressure |
3. 2025-2027 scenario
The source model is driven by 25GS-PON commercialization timing, global telecom capex cycles, and the pace of automotive semiconductor entry. It frames 2025 as bottoming, 2026 as the turnaround year, and 2027 as the quantum-jump period when upgraded telecom chips and automotive revenue may combine.
| Item | 2024 actual | 2025E | 2026E | 2027E |
|---|---|---|---|---|
| Revenue | KRW 22.2bn | KRW 12.0bn (11.5-12.5) | KRW 28.0bn (25.0-30.0) | KRW 50.0bn (45.0-55.0) |
| Product revenue | KRW 6.7bn | KRW 6.0bn | KRW 12.0bn | KRW 30.0bn |
| Service revenue | KRW 12.5bn | KRW 3.0bn | KRW 14.0bn | KRW 18.0bn |
| Operating profit | KRW 0.4bn | -KRW 6.0bn (-5.5~-6.5) | KRW 2.0bn (1.0-3.0) | KRW 10.0bn (8.0-11.0) |
| Operating margin | 1.6% | -50.0% | 7.1% | 20.0% |
| Key driver | Initial NRE recognition | R&D concentration | 25G commercialization/BEAD | Automotive and production ramp |
Official fact: The source estimates 2025 revenue of KRW 11.5-12.5 billion and operating loss of KRW 6.0-6.5 billion. It estimates 2026 revenue of KRW 25.0-30.0 billion and operating profit of KRW 1.0-3.0 billion, then 2027 revenue of KRW 45.0-55.0 billion and operating profit of KRW 8.0-11.0 billion.
4. Industry and competition
The telecom market is moving toward 1:N PON structures because 5G small cells make one-to-one fiber connections inefficient. The source uses the expectation that global small-cell base stations will exceed 13 million by 2027 as support for XGSPON backhaul demand. BEAD program spending from 2026 is another variable for North American XGSPON and 25GS-PON equipment demand.
2025 revenue expected at KRW 154.7bn
Focused on defense and 5G GaN transistors. It is larger, but the source says Zaram may have higher operating leverage as a fabless chip designer.
5G filters and antennas
The source notes recent large losses and financial difficulty. Zaram's cash liquidity and ongoing future investment are the comparison points.
Ultra-low-power SFP+ Stick niche
Rather than competing head-on with large players, Zaram is positioned as a solution provider for the heat problem they have not solved in this niche.
5. Risks and monitoring indicators
- Customer concentration: the top three customers were highly concentrated in 2024, and Customer A exceeded 50%, so order delays can create immediate earnings shocks.
- CB overhang: KRW 33.0 billion of outstanding convertible bonds can dilute existing shareholders if converted during a share-price recovery.
- Automotive qualification delay: if ISO 26262, AEC-Q100, and other automotive gates slip, the 2027 estimate becomes harder to reach.
- Leading indicators: watch 25GS-PON sample-chip disclosures, orders from Nokia, AT&T, and Korean telecom carriers, and automotive semiconductor demo news.
Sources
- Original: https://m.blog.naver.com/PostView.naver?blogId=star_of_self&logNo=224103720522
- Telecom trend report PDF: https://drive.google.com/open?id=1iQ1x_AnKdopb1ojWaFruJleJLdWfBkZ1