Iljin Diamond

일진다이아 · 081000

Materials Chemicals · KOSPI

Small-cap

Market cap US$108.1M (₩149.1B)

Overview

Iljin Diamond makes synthetic industrial diamonds, lab-grown diamonds used as the cutting material in tools for drilling, grinding, and machining.

Its products serve a wide range of industries, including construction, mining, automotive, shipbuilding, aerospace, IT devices, and semiconductors. Listed on KOSPI, Korea's main stock exchange, the company operates sales subsidiaries in the United States, Japan, China, and Germany, and runs a production facility in Vietnam alongside its domestic headquarters.

Summary is AI-generated and may contain errors · figures from DART filings

Financials

Source: DART · FY ending Dec · latest FY2025

Revenue · FY2025

US$117.7M

▲ +3.4% YoY

Operating profit · FY2025

−US$4.9M

Loss widened

Net income · FY2025

US$4.2M

▼ −57.5% YoY

Revenue, operating profit and net income by fiscal year (USD; KRW in parentheses).
Metric	FY2023	FY2024	FY2025
Revenue	US$111.9M(₩154.5B)	US$113.8M(₩157.1B)	US$117.7M(₩162.4B)
Operating profit	−US$3.2M(−₩4.4B)	−US$3.4M(−₩4.6B)	−US$4.9M(−₩6.8B)
Net income	US$7.7M(₩10.6B)	US$9.9M(₩13.6B)	US$4.2M(₩5.8B)

Revenue

FY2023US$111.9M
FY2024US$113.8M
FY2025US$117.7M

Operating profit

FY2023−US$3.2M
FY2024−US$3.4M
FY2025−US$4.9M

Net income

FY2023US$7.7M
FY2024US$9.9M
FY2025US$4.2M

Key ratios (FY2025)

ROE

1.1%

Debt/Eq

13.5%

Op. margin

-4.2%

Net margin

3.6%

Rev. YoY

▲ +3.4%

Why it matters

The company co-developed its core synthetic-diamond technology with KIST (Korea Institute of Science and Technology) and maintains an in-house industrial research institute at its headquarters.

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