KOSDAQMachinery256150

Handok Clean Tech

₩5,020▼ 0.20%2026-10-02 close

Market Cap

₩42.1B

Turnover

₩7,518,975

Volume

1,499 shares

Shares out.

8.4M

PER

8.0×

PBR

0.6×

EPS

₩599

Dividend Yield

5.21%

PER, EPS, PBR and BPS are calculated in-house from the last 4 quarters (2025Q3–2026Q2) · Dividend yield is based on ₩250 per share · Prices as of the 2026-10-02 close

Report overview

Water Filter Leader Shows Signs of Margin Recovery

Handok Clean Tech, the leading domestic carbon block filter maker, saw operating profit rebound sharply in the first half of 2026 after a period of margin pressure in 2025.

1
The company is assessed as the No.1 player with a majority share of the domestic water purifier carbon block filter market.
2
2025 revenue grew modestly to KRW 69.4 billion, but the operating margin fell to 4.1%, before profit rebounded sharply in the first half of 2026.
3
Overseas revenue is growing, driven by a new major Chinese customer and expansion of a US B2B distribution channel.
4
The company is expanding into B2C with finished water purifiers under its Aquon brand and has secured factory land in Cheongju to support future capacity.
5
The company has paid cash dividends for six consecutive years, maintaining a shareholder return policy.

Business structure

Handok Clean Tech is a filter materials and components company specializing in carbon block filters for water purifiers and air purifiers.

The company operates businesses including carbon block filters, composite filters, and deodorizing filter manufacturing, and as of 2024 water purifier filters accounted for 99.8% of total revenue. As of the first quarter of 2026, the revenue mix is estimated at 88% carbon block filters and 12% composite filters.

Major customers include most domestic water purifier brands such as Coway, LG Electronics, SK Magic, and Samsung Electronics, and the company participates in joint development from the early stages of purifier development, which helps secure recurring replacement-filter demand on an exclusive basis.

Competitors in filter manufacturing include Altwelltech, Picogram, Microfilter, and Woongjin Coway, with the company competing in a market that has structural entry barriers.

More recently, the company has been diversifying based on its carbon block compression-molding technology into automotive cabin filters, industrial filters, and electrodeionization (EDI) technology.

Overseas, it has been expanding exports to the United States, China, Southeast Asia, and Japan under its "Aquon" brand, while also strengthening its B2C portfolio through finished products such as the Aquon Pitcher (auto-pitcher purifier) and Aquon Countertop (direct-connection purifier).

To support future capacity needs, the company reportedly secured factory land in Cheongju, laying the groundwork to respond to potential order growth.

Earnings trend

Quarterly revenue · Operating profit

₩17.9B₩1.1B25Q2₩18.4B₩800M25Q3₩16.7B₩70,632,73325Q4₩19.3B₩900M26Q1₩21.1B₩2.4B26Q2

RevenueOperating profit

Annual revenue · Operating profit

₩59.1B₩5.1B2022₩65.1B₩5.2B2023₩68.2B₩3.5B2024₩69.4B₩2.8B2025

RevenueOperating profit

Quarterly results · Last 5 quarters
Quarter	Revenue	Operating profit	Op. margin
2025Q2	₩17.9B	₩1.1B	6.2%
2025Q3	₩18.4B	₩800M	4.3%
2025Q4	₩16.7B	₩70,632,733	0.4%
2026Q1	₩19.3B	₩900M	4.7%
2026Q2	₩21.1B	₩2.4B	11.5%

Annual results
Year	Revenue	Operating profit	Net income (parent)	Op. margin	ROE	Debt-to-equity
2022	₩59.1B	₩5.1B	₩5.1B	8.6%	9.5%	10.6%
2023	₩65.1B	₩5.2B	₩5.3B	8.0%	9.4%	10.8%
2024	₩68.2B	₩3.5B	₩3.6B	5.1%	6.4%	10.8%
2025	₩69.4B	₩2.8B	₩2.7B	4.1%	4.7%	11.4%

Consolidated basis (financial statements including subsidiaries) · Final figures from DART filings · Net income attributable to owners of the parent · Data as of 2026-08-23

Earnings analysis

Handok Clean Tech's annual revenue rose for four consecutive years, from KRW 59.1 billion in 2022 to KRW 65.1 billion in 2023, KRW 68.2 billion in 2024, and KRW 69.4 billion in 2025.

However, the operating margin clearly declined, from 8.6% in 2022 and 8.0% in 2023 to 5.1% in 2024 and 4.1% in 2025, with 2025 operating profit falling to KRW 2.82 billion from KRW 3.50 billion a year earlier, and owners' net profit falling to KRW 2.73 billion from KRW 3.62 billion.

On a quarterly basis, profitability bottomed out as operating profit fell sharply from KRW 786 million in the third quarter of 2025 (on revenue of KRW 18.4 billion) to just KRW 71 million in the fourth quarter (on revenue of KRW 16.7 billion).

This was followed by a recovery, with first-quarter 2026 revenue of KRW 19.3 billion and operating profit of KRW 911 million, and a sharp rebound in the second quarter of 2026 to revenue of KRW 21.1 billion and operating profit of KRW 2.43 billion, lifting the operating margin to roughly 11.5%.

Second-quarter owners' net profit of KRW 2.52 billion exceeded operating profit, suggesting some non-operating gains were also reflected.

Over the trailing four quarters (third quarter 2025 through second quarter 2026), cumulative revenue reached KRW 75.5 billion, operating profit KRW 4.20 billion, and owners' net profit KRW 4.62 billion, an improvement over full-year 2025 levels for both operating and net profit.

This quarterly volatility illustrates how cost structure and the timing of customer orders can cause significant swings in profitability.

Industry analysis

The domestic water purifier filter market has developed a stable, recurring revenue structure driven by the shift toward rental services and periodic replacement demand.

Handok Clean Tech is regarded as the domestic No.1 player with a majority market share in this space, with commentary suggesting there are limited alternative suppliers capable of replacing it in the carbon block filter market.

The competitive landscape is a mix of specialized filter makers such as Altwelltech, Picogram, and Microfilter, and purifier brand companies such as Woongjin Coway that also maintain in-house production capacity.

Because filters are jointly developed with brand companies from the purifier design stage and must receive water-quality certification, once a filter is adopted it tends to be used exclusively over a long period.

Overseas, purifier rental and sales markets have been expanding in China, Southeast Asia, the United States, and Japan, and the overseas expansion of domestic purifier brands is linked to Handok Clean Tech's own revenue as their filter supplier.

That said, overseas revenue previously contracted amid intensifying competition in the Chinese market, so the durability of overseas growth can vary depending on competitive conditions in each individual market.

More recently, some assessments suggest the company is undergoing a strategic shift from a filter supplier toward a comprehensive water-treatment solutions provider.

Outlook

In a March 2026 report, the Korea IR Council forecast Handok Clean Tech's 2026 revenue at KRW 75.2 billion (up 8.2% year over year) and operating profit at KRW 5.3 billion (up 88.8%), expecting the operating margin to improve to 7.1% on the back of cost efficiencies from production-line automation and higher selling prices to key customers.

Actual first-half 2026 revenue came in at KRW 40.35 billion with operating profit of KRW 3.34 billion, meaning a substantial portion of the full-year operating profit guidance was already achieved in the first half.

In its overseas business, the company reportedly secured a large Chinese appliance maker as a new customer in 2025, while in the United States, commercial water purifier filter sales through a B2B channel with an industrial-supplies distributor are said to be continuing.

The company has completed an initial order in Southeast Asia as part of expanding its own "Aquon" branded finished products, and has reportedly been preparing to enter additional markets including Japan and the United States.

The secured factory land in Cheongju is cited as a production base to respond to future order growth. However, how much these targets and new-market plans ultimately translate into actual results will need to be confirmed through upcoming quarterly disclosures.

Valuation

PER

8.0×

PBR

0.6×

ROE

8.0%

EPS

₩599

BPS

₩7,722

Dividend per share

₩250

Since its 2019 listing, Handok Clean Tech has generally traded at double-digit valuation multiples, at one point rising toward the upper end of its historical range on overseas growth expectations before falling toward the lower end amid intensifying competition and cost pressure, and it has reportedly continued to fluctuate in the lower-to-middle portion of that historical band more recently.

The stock tends to trade below the company's net asset value per share, suggesting the premium over book value is not large.

In a March 2026 report, the Korea IR Council assessed that, based on the company's hegemony in the domestic water filter market, earnings visibility, and its historical valuation average, the valuation level at that time was in an attractive range, though this reflects a view from a specific point in time and could change with subsequent share price and earnings trends.

The company has maintained cash dividends for several consecutive years since 2020, and the continuity of this shareholder-return policy may be a relevant consideration for dividend-focused investors.

Given that the 2025 profit decline and the first-half-2026 rebound occurred together, whether the margin recovery proves durable remains an important variable for valuation assessment.

PER, EPS, PBR and BPS are all calculated in-house (the same method as Naver and Toss) · Dividend yield = cash dividend per share from DART filings (supplemented by KRX) ÷ current price · As of 2026-08-23

Bull factors

Structural Position with Majority Domestic Filter Share

Handok Clean Tech is assessed as the No.1 player with a majority share of the domestic carbon block filter market. Because filters are co-developed with brand companies from the purifier design stage and must be certified, once adopted they tend to be used exclusively over a long period.

This gives the company a business structure in which continued expansion of the purifier rental market and periodic replacement demand can translate into recurring revenue.

Overseas Channel Diversification and Branded Finished Products

In 2025, the company secured a large Chinese appliance maker as a new customer, and in the United States, B2B channel revenue through an industrial-supplies distributor is said to be continuing.

The company has also expanded into the B2C space, completing an initial order in Southeast Asia for finished pitcher-type and direct-connection purifiers under its own "Aquon" brand. This diversification of customers and regions could reduce dependence on any single market.

Clear Operating Margin Rebound in First-Half 2026

After the operating margin fell to just 0.4% in the fourth quarter of 2025, operating profit recovered clearly to KRW 911 million and KRW 2.43 billion in the first and second quarters of 2026, respectively.

The Korea IR Council explained that cost efficiencies from production-line automation and higher selling prices underpinned the expected 2026 margin improvement. The fact that a substantial portion of the full-year guidance was already achieved in the first half can be read as a signal of profit recovery.

Bear factors

Multi-Year Trend of Declining Operating Margin

The operating margin declined for four consecutive years, from 8.6% in 2022 to 8.0% in 2023, 5.1% in 2024, and 4.1% in 2025. The fact that margins were under continuous pressure even as revenue grew each year suggests structural burdens in cost structure or the competitive environment.

Whether the first-half 2026 rebound represents a temporary improvement or a structural shift will need to be confirmed with additional quarterly results.

High Quarterly Earnings Volatility

Quarterly earnings showed wide swings, with operating profit falling sharply from KRW 786 million in the third quarter of 2025 to KRW 71 million in the fourth quarter, before jumping to KRW 2.43 billion in the second quarter of 2026.

This shows that results in any given quarter can be skewed by the timing of customer orders or cost recognition. Such volatility makes it difficult to judge the annual trend from a single quarter's results.

Small-Cap Characteristics and Customer Concentration

Handok Clean Tech is a small-cap stock with relatively limited market capitalization, which can mean thinner trading.

A significant portion of revenue is concentrated among a small number of domestic water purifier brands such as Coway, LG Electronics, SK Magic, and Samsung Electronics, so changes in any single customer's ordering policy or expansion of in-house production could affect results.

The existence of brand companies such as Woongjin Coway that maintain their own production capacity also remains a long-term competitive variable.

Risk factors

Raw Material and Cost Pressure

Fluctuations in the prices of raw materials such as activated carbon and binder, the core inputs for carbon block filters, directly affect manufacturing costs.

The company has previously stated a goal of developing raw materials and new materials to secure cost competitiveness, but if raw material price increases continue, the pace of operating margin recovery could be slower than expected. The margin decline seen in recent years is presumed to be related, at least in part, to this cost pressure.

Customer Concentration and In-House Production Competition

Because revenue is concentrated among a small number of large purifier brands, changes in their ordering policies or production strategies can directly affect results.

A competitive landscape exists in which companies such as Woongjin Coway maintain in-house production capacity, so the possibility that the share of outsourced filter supply could shrink over the long term cannot be ruled out.

New customer wins and overseas channel diversification may help ease this concentration, but the absolute majority of revenue still depends on a small number of domestic customers.

Intensifying Overseas Competition and Currency Volatility

Given that overseas revenue previously contracted amid intensifying competition in the Chinese market, the possibility that competitive conditions could deteriorate again in China, the United States, Southeast Asia, or elsewhere cannot be ruled out.

As the export share grows, currency fluctuations could have a greater impact on revenue and profitability. Entry into new finished-product markets such as Japan and the United States is also still at an early stage, carrying the risk that plans may not proceed as intended.

What to watch next

Around November 2026
Third-quarter 2026 results disclosures should be checked to see whether the second-quarter operating margin rebound continues and whether the company is on track to meet its full-year guidance of KRW 75.2 billion in revenue and KRW 5.3 billion in operating profit.
Second half of 2026 into early 2027
It is worth monitoring progress on the Aquon brand's entry into the Japanese and US markets, as well as whether follow-on orders for finished products in Southeast Asia materialize.
Fourth quarter of 2026
It is worth checking whether concrete plans for expansion or commissioning related to the Cheongju factory land materialize and how capacity expansion is progressing.
Around February 2027
Full-year 2026 results and the board's decision on a cash dividend will show whether the company extends its dividend streak to a seventh consecutive year.

Overall view

Handok Clean Tech is the No.1 player with a majority share of the domestic carbon block filter market, having sustained steady revenue growth on the back of recurring replacement demand tied to the expanding water purifier rental market.

However, profitability came under clear pressure as the operating margin declined continuously from 8.6% in 2022 to 4.1% in 2025, before rebounding to double-digit levels in the first half of 2026.

Overseas, the company has pursued diversification through a new large Chinese customer, an expanding US B2B channel, and entry into Southeast Asia with finished products under its Aquon brand.

On the other hand, the concentration of revenue among a small number of large domestic customers, raw material costs, and intensifying overseas competition remain variables to watch.

Whether the first-half 2026 earnings rebound continues in line with full-year guidance, and whether new overseas market entries translate into meaningful revenue, will require ongoing confirmation through future quarterly disclosures.

The company's six consecutive years of cash dividends can be referenced as an indicator of the consistency of its shareholder-return policy.

Sources

Korea Exchange (KRX) — Prices · Market Cap · Volume
FSS electronic disclosure system (DART) — Financial statements · Dividend filings

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Report written 2026-09-05 · Data as of 2026-09-04

This content is AI analysis of market data and web search results, provided for information only. It is not a solicitation or recommendation to invest. Investment decisions and their consequences are the investor's own responsibility. Data may be delayed or contain errors.