In Singapore's stock market, anomalies occasionally emerge that look like attractive opportunities.

One such case is Koh Brothers Eco Engineering, an engineering/construction firm whose market capitalization significantly undervalues its substantial stake in Oiltek International.

 
Koh Eco's 68.14% direct stake in Oiltek, a sizzling stock performer, translates to roughly SGD 319 million—exceeding its own market cap by over 40%, as estimated below: 

Description

SGD

Details

Koh Eco Share Price (Aug 4, 2025)

0.08

 

Koh Eco Market Capitalization

225 million

Based on 2.82 billion outstanding shares.

Oiltek Share Price (Aug 4, 2025)

1.09

 

Oiltek Market Capitalization

468 million

Based on 429 million outstanding shares.

Koh Eco's Stake in Oiltek

68.14%

Koh Eco's direct ownership in Oiltek.

Value of Koh Eco’s Stake in Oiltek

319 million

Calculated as 68.14% of Oiltek’s SGD 468 million market capitalization.

Value Excess Over Koh Eco’s Market Cap

>40%

Koh Eco’s stake in Oiltek exceeds its own market cap by over 40%.



This disparity raises a compelling question: Why is the market assigning such a discount, even when a broad array of Singapore construction stocks have made strong gains?

Or is it just market inefficiency?



Koh Eco has a track record of delivering major projects as illustrated below: 

 KohEco projects7.25

 Losses in construction segment 


Several factors contribute to this undervaluation.
 

Koh Eco CEO Paul Shin
PaulShin KohEco"The impact of COVID-19 on the construction industry has been significant and widespread, with delays in project timelines being a common challenge faced by many companies, including the Company. These delays, typically ranging from two to three years, have resulted in ongoing operational costs, such as staff salaries and the upkeep of site offices, which must be borne by the companies even when work is stalled or progressing slowly."

(Source: Minutes of FY2024 AGM)

Primarily, Koh Eco has grappled with operational headwinds, including persistent losses.

However, much of this can be attributed to legacy COVID-19-era projects impacted by post-pandemic cost escalations, supply chain disruptions, and labor shortages.


For FY2024, the company reported a net loss of SGD 17.1 million (FY23: SGD 13.4 million loss), with revenue dipping 16% to SGD 149 million.


These metrics erode investor confidence in its core engineering and construction segment.


Koh Brothers Eco FY2024 financials

 SGD

Details

Net Loss Attributable to Equity Holders

17.1 million

Reported net loss for Koh Eco.

Oiltek Net Profit (FY2024)

8.89 million

Oiltek's net profit of RM 29.6 million, converted at RM 3.33 to SGD 1.

Koh Eco's Stake in Oiltek

68.14%

Koh Eco's ownership in Oiltek.

Attributable Profit from Oiltek to Koh Eco

6.06 million

Calculated as 68.14% of Oiltek’s SGD 8.89 million net profit.

Minority Interest Deduction

2.83 million

31.86% non-controlling interest in Oiltek’s net profit.

Net Loss Without Oiltek’s Contribution

23.16 million

Adjusted net loss for FY2024 (SGD 17.1 million + SGD 6.06 million).

Engineering and Construction Segment Losses

20.2 million

Primary driver of Koh Eco’s overall losses in FY2024.

 

Furthermore, as a small-cap stock, Koh Eco does not entice institutional investors even when the stock's price implies a negative valuation for Koh Eco's non-Oiltek businesses.

However, Koh Eco's fundamentals suggest room for optimism, bolstered by a string of large contract wins as illustrated below: 


Date

Contract Value (SGD)

Client

Project Description

June 2025

999 million

Changi Airport Group

Construction of intra-terminal tunnels at Terminal 5. Secured by subsidiary holding 30% in JV with Penta Ocean

December 2024

313.9 million

Land Transport Authority 

Multi-storey bus depot at Lorong Halus

November 2024

77.6 million

Sport Singapore

Piling works for the Toa Payoh Integrated Development



And one may assume that the contract wins come with decent profit margins, though industry risks remain for cost over-runs, etc as the projects progress.

These wins have swelled Koh Eco's order book to SGD 1.1 billion, signaling robust revenue visibility amid Singapore's construction boom.

Oiltek's Momentum, Construction's Comeback

 

Oiltek's performance has been nothing short of breathtaking, and it is what amplifies Koh Eco's undervaluation.

Oiltek price 

$1.08

52-week range

$0.145-$1.16

Market cap

S$468 m

PE (ttm)

46

Dividend yield 

0.8%

P/B

17

Source: Yahoo!

As a leader in edible and non-edible oil refining and renewable energy solutions, Oiltek has seen its shares surge 212% year-to-date (to $1.08), driven by a record RM 332.5 million order book as of July 2025.

Analysts are bullish, with forecasts projecting strong EPS growth --- but should this not materialise, Oiltek risks falling badly from its current high PE valuation.

Ultimately, the valuation gap in Koh Eco's stock could present an opportunity for investors.

To fully reflect its 68.14% stake in Oiltek, Koh Eco’s stock price should theoretically be approximately 11.3 cents, compared to its recent price of 8 cents.

This represents a potential upside of about 41%, while still assigning (a ridiculous and unjustified) zero value to its construction and engineering segment.


The key catalyst to a re-rating is likely to be a turnaround in the engineering/construction segment.

In fact, it has materialised: Koh Eco last night said it expected to report a net profit for 1H2025.

That is "mainly attributable to the increase in revenue due to higher contributions from new projects secured under the Engineering and Construction segment as well as net profit contributed from the Bio-Refinery and Renewable Energy segment."




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