Dong-Ah Geological Engineering
Daily close in US$ at the latest USD/KRW close. Source: KRX via FinanceDataReader.
Dong-Ah Geological Engineering is a Korean civil-engineering contractor that stabilises and prepares ground for construction, work that includes soil improvement, underground diaphragm walls, mechanised tunnel boring, and conventional drilling and grouting.
Its clients are broadly public and private project owners who need specialist ground-engineering services before and during major infrastructure builds. Listed on KOSPI, Korea's main stock exchange, the company covers the full cycle from ground investigation and testing through design and construction, which it describes as its core competitive capability.
Summary is AI-generated and may contain errors · figures from DART filings
The filing shows the company operates as a group with a parent ('controlling company') and subsidiaries, all engaged in the same construction business.
Dong-Ah Geological Engineering in five facts
What does Dong-Ah Geological Engineering do?
Dong-Ah Geological Engineering is a Korean civil-engineering contractor that stabilises and prepares ground for construction, work that includes soil improvement, underground diaphragm walls, mechanised tunnel boring, and conventional drilling and grouting.
Where is Dong-Ah Geological Engineering listed and in which sector?
Dong-Ah Geological Engineering (Korean name: 동아지질) trades under KRX code 028100 on KOSPI, the main board of the Korea Exchange. It is classified in the Industrials sector, Construction & Engineering.
How large is Dong-Ah Geological Engineering?
Its market capitalisation was US$161.8M on 2026-10-21, which puts it in this site's small-cap group. US$ amounts are converted from won at 1 USD ≈ ₩1,325 (2026-10-21).
What were Dong-Ah Geological Engineering's latest annual revenue and operating profit?
For fiscal year 2025, Dong-Ah Geological Engineering reported revenue of US$353M, operating profit of US$13.6M and net income of US$14.1M, per its annual report on DART (data retrieved from DART on 2026-09-08). Revenue was up 18.9% on the previous year.
Where does this data come from?
Financial statements and filings come from DART, Korea's official corporate-filing system. Share prices, market capitalisation and trading status come from KRX. Company summaries are AI-generated from the filings and may contain errors; financial figures are mapped directly from DART.
Data sources and last updated
- Filings and financial statements
- DART (dart.fss.or.kr), Korea's official corporate-filing system
- Prices, market cap, trading status
- KRX (Korea Exchange), via FinanceDataReader
- Latest annual financials
- Fiscal year 2025, data retrieved from DART on 2026-09-08
- Share price and market cap
- Close of 2026-10-21
- Currency
- US$, converted from won at 1 USD ≈ ₩1,325 (2026-10-21 close)
- Company data updated
- 2026-10-21
- Company summary
- AI-generated from filings; may contain errors. Information only, not investment advice.
- [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Hyundai Engineering & Construction, now worth US$25M, about 9.6% of its recent annual revenue, running through Nov 2026.
Supply contract · Oct 19 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with a company, now worth US$16.2M, about 6.3% of its recent annual revenue, running through Dec 2027.
Supply contract · Oct 16 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with SHANGHAI TUNNEL ENGINEERING CO (SINGAPORE) PTE LTD, now worth US$40M, about 15% of its recent annual revenue, running through Sep 2026.
Supply contract · Sep 30 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Hyundai Engineering & Construction, now worth US$24.5M, about 9.6% of its recent annual revenue.
Supply contract · Sep 30 - Clarification of rumor or media report (unconfirmed)Sep 23
- DisclosureSep 9
- [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Hyundai Engineering & Construction, now worth US$24.2M, about 9.6% of its recent annual revenue, running through Sep 2026.
Supply contract · Sep 1 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Hyundai Engineering & Construction, now worth US$24.3M, about 9.6% of its recent annual revenue.
Supply contract · Aug 31 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Hyundai Engineering & Construction, now worth US$24.1M, about 9.5% of its recent annual revenue, running through Nov 2025.
Supply contract · Aug 31 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Maintenance Foundation of the Roman Catholic Diocese of Busan, now worth US$18.2M, about 9.4% of its recent annual revenue.
Supply contract · Aug 28 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract, now worth US$20M, about 10.4% of its recent annual revenue, running through Apr 2027.
Supply contract · Aug 28 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with SK ecoplant, now worth US$76.1M, about 34.5% of its recent annual revenue, running through Dec 2026.
Supply contract · Aug 26 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Wohhup (Private)Limited, now worth US$31.6M, about 16.8% of its recent annual revenue.
Supply contract · Aug 14 - Supply contract signed
Dong-Ah Geological Engineering disclosed a supply contract with KTC CIVIL E&C PTE LTD, worth US$17.1M, about 5.2% of its recent annual revenue, running through Oct 2027.
Supply contract · Aug 6 - [Amended] Supply contract signed (voluntary)
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Hyundai Engineering & Construction Co., Ltd. and others, now worth US$10.1M, about 5.4% of its recent annual revenue, running through Jan 2027.
Supply contract · Aug 6 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Korea Electric Power Corp. (KEPCO), now worth US$17.5M, about 7.2% of its recent annual revenue, running through Jan 2029.
Supply contract · Aug 3 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Maintenance Foundation of the Roman Catholic Diocese of Busan, now worth US$17.6M, about 9.4% of its recent annual revenue, running through Aug 2026.
Supply contract · Jul 30 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract, now worth US$11.2M, about 6.1% of its recent annual revenue, running through Feb 2027.
Supply contract · Jul 27 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Maintenance Foundation of the Roman Catholic Diocese of Busan, now worth US$16.2M, about 9.4% of its recent annual revenue.
Supply contract · Jun 30 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with SK ecoplant, now worth US$66.3M, about 33.6% of its recent annual revenue, running through Dec 2026.
Supply contract · Jun 30 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract, now worth US$21.5M, about 12.5% of its recent annual revenue, running through Dec 2026.
Supply contract · Jun 30 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Hyundai Engineering & Construction, now worth US$21.5M, about 9.6% of its recent annual revenue, running through Aug 2026.
Supply contract · Jun 30 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Philippines Department of Transportation, now worth US$56.8M, about 23.08% of its recent annual revenue, running through Dec 2028.
Supply contract · Jun 25 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Hyundai Engineering & Construction, now worth US$77.7M, about 30.5% of its recent annual revenue, running through Dec 2027.
Supply contract · May 29 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Obayashi Singapore Private Limited, now worth US$24.6M, about 9.3% of its recent annual revenue.
Supply contract · May 18 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Obayashi Singapore Private Limited, now worth US$25.2M, about 9.3% of its recent annual revenue, running through May 2026.
Supply contract · May 8 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract, now worth US$19M, about 9% of its recent annual revenue, running through Dec 2026.
Supply contract · Apr 29 - [Amended] Supply contract signed (voluntary)
Dong-Ah Geological Engineering updated a previously disclosed supply contract with Busan Transportation Corporation, now worth US$18.5M, about 8.42% of its recent annual revenue, running through Nov 2026.
Supply contract · Apr 27 - Supply contract signed
Dong-Ah Geological Engineering disclosed a supply contract, worth US$45.9M, about 14.5% of its recent annual revenue, running through Apr 2028.
Supply contract · Apr 9 - [Amended] Cash/in-kind dividend decision
Dong-Ah Geological Engineering updated its declared cash dividend of US$0.40 per share, equal to about 3.3% of the recent share price.
Dividend · Mar 17 · 2 versions - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract, now worth US$11.4M, about 6.1% of its recent annual revenue, running through Jul 2026.
Supply contract · Feb 27 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract, now worth US$11.3M, about 6.1% of its recent annual revenue, running through Feb 2026.
Supply contract · Feb 12 - [Amended] Supply contract signed
Dong-Ah Geological Engineering updated a previously disclosed supply contract with a company, now worth US$14.6M, about 6.2% of its recent annual revenue, running through May 2027.
Supply contract · Feb 6 - Change of 30% or more in revenue or profit/loss structure (15% for large companies)Earnings · Feb 2
- [Amended] Supply contract signedSupply contract · Jan 29
- [Amended] Supply contract signed (voluntary)Supply contract · Jan 23
- [Amended] Supply contract signedSupply contract · Jan 12
- Supply contract signedSupply contract · Jan 9
