1. South Korea Stocks

  2. •

    Electronic technology

  3. •

    Electronic production equipment
ATUM CO. LTD

ATUM CO. LTD

KKRX:355690
6,520.00
KRW
+20.00
(+0.31%)
-754.95EPS
45.90BMarket Cap
2019 Y
2020 Y
2021 Y
2022 Y
2023 Y
2024 Y
2024 Y
2025 Y
TTM
Revenue per Share
102,859.06
162,882.91
249,671.28
10,712.74
8,817.68
6,078.61
3,042.67
10,498.31
16,576.2
Basic EPS, GAAP
-74.11
-38,497.5
-90,734.83
-2,228.92
-1,451.58
-710.48
-322.21
-1,263.08
-873.88
Free Cash Flow per Basic Share
-35,049.36
-43,716.03
-32,016.06
-1,181.64
119.55
-813.4
-452.84
-942.35
-275.57
Dividend per Share
- -
- -
- -
- -
- -
- -
- -
- -
- -
Book Value per Share
-45.21
-724.45
874.12
191.5
348.67
2,112.44
1,639.64
415.08
1,367.41
Tangible Book Value per Share
-48.43
-2,737.63
-519.24
-525.46
-200.13
1,714.94
1,307.28
-1,837.87
-150.74
Basic Weighted Avg Shares
- -
- -
- -
5
5
6
7
7
7
Sales/Revenue/Turnover
14,096
23,456
55,809
53,634
47,971
38,503
20,440
70,426
111,572
Operating Margin (%)
1.01
-10.63
-8.25
-14.26
-12.35
-10.77
-12.78
-9.29
-3.99
Depreciation Expense
601
1,250
2,925
3,198
3,071
3,024
1,655
4,274
4,966
Net Income, GAAP
-10
-5,544
-20,282
-11,159
-7,897
-4,500
-2,165
-8,473
-5,882
Effective Tax Rate (%)
- -
- -
- -
- -
- -
- -
- -
- -
- -
Profit Margin (%)
-0.07
-23.64
-36.34
-20.81
-16.46
-11.69
-10.59
-12.03
-5.27
Working Capital
-2,500
-19,878
-9,478
-7,842
-8,259
2,954
4,841
-15,534
-6,670
LT Debt
4,786
7,926
6,969
7,081
4,978
4,945
5,952
6,445
3,256
Total Equity
-300
-1,945
8,438
3,061
3,612
15,384
12,129
14,125
24,409
Return on Invested Capital (%)
- -
- -
- -
- -
- -
- -
- -
- -
- -
Return on Capital (%)
- -
- -
- -
- -
- -
- -
- -
- -
- -
Return on Common Equity (%)
- -
- -
- -
-315.63
-440.64
-54.59
-17.2
-122.92
-74.84

Capital Structure

KRW

•

in mil. unless spec.
Dec'25
Mar'26
Jun'26
ST Debt
31,788
31,754
29,426
LT Borrowings
5,164
4,985
2,219
LT Finance Leases
1,281
1,173
1,037
Preferred Equity and Hybrid Capital
- -
- -
- -
Shares Outstanding
7
5
9
Market Capitalization
24,161
27,565
45,896

Working Capital

KRW

•

in mil. unless spec.
Dec'25
Mar'26
Jun'26
Total Current Assets
33,250
35,329
43,904
Cash, Cash Equivalents & STI
2,541
3,104
11,659
Accounts Receivable, Net
11,815
12,028
11,548
Inventories
15,468
17,659
17,935
Total Current Liabilities
48,785
53,636
50,574
Payables & Accruals
- -
- -
- -
ST Debt
31,788
31,754
29,426
Deferred Revenue
- -
- -
- -

Growth Rates

KRW

•

in mil. unless spec.

(avg. rate of change)

10 years
5 years
1 year
Total Equity
- -
55.1%
16.45%
Free Cash Flow
- -
-190.73%
107.8%
Net Income, GAAP
- -
24.47%
291.45%
Sales/Revenue/Turnover
- -
32.69%
244.55%
Total Cash Common Dividend
- -
- -
- -

Quarterly Revenue

KRW

•

in mil. unless spec.

Year

Q1
Q2
Q3
Q4
FY
2024
8,710
9,455
10,313
- -
20,440
2025
8,938
8,326
25,485
27,677
70,426
2026
26,115
32,295
- -
- -
- -

Quarterly Earnings Per Share

KRW

•

in mil. unless spec.

Year

Q1
Q2
Q3
Q4
FY
2024
-222.56
132.27
-254.65
- -
-322.21
2025
-231.99
-780.56
-452.3
202.18
-1,263.08
2026
-557.48
-147
- -
- -
- -

Quarterly Dividends Per Share

KRW

•

in mil. unless spec.

Year

Q1
Q2
Q3
Q4
FY
2024
- -
- -
- -
- -
- -
2025
- -
- -
- -
- -
- -
2026
- -
- -
- -
- -
- -

Company Description

Company Profile APIChatGPT
CEO
Taek-soo Han
Full Time Employees
35
Sector
Electronic technology
Industry
Electronic production equipment
Address
Seoul South Korea
IPO Date
Dec 1, 2023
Website
iatum.com
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Business
ATUM Co., Ltd. is a South Korea-based power electronics manufacturing company primarily engaged in the design, development, and production of advanced planar transformers and high-efficiency magnetic components for consumer mobile devices, electric vehicles, and industrial electronics. Founded in 2016 and headquartered in Pyeongtaek, Gyeonggi-do, South Korea, the company maintains domestic operations and oversees international manufacturing facilities through its overseas subsidiary, Atum Vina Co., Ltd., located in Vietnam. ATUM organizes its product portfolio into several key segments: Mobile Fast-Charging Solutions, including ultra-slim planar transformers, high-power charging modules, compact AC-DC converter components, and high-frequency power adapters for mobile devices and smartphones; Electric Vehicle and Automotive Power Systems, including on-board charger (OBC) transformers, high-voltage and low-voltage DC-DC converter inductors, electric vehicle fast-charging station components, and battery management electronic parts; Display and Home Appliance Components, including slim switch-mode power supply (SMPS) transformers, flat display board power modules, and consumer electronic magnetic units; and Industrial Power Infrastructure, including energy storage system (ESS) conversion transformers, solar inverter magnetics, and automated power distribution components. The company leverages proprietary planar winding technology and specialized automated molding processes that significantly reduce component thickness, improve thermal dissipation, and eliminate manual manufacturing constraints associated with traditional wire-wound transformers. In recent operational and strategic developments, ATUM completed its initial public offering on the KOSDAQ market of the Korea Exchange under ticker 355690; expanded automated production lines at its Vietnamese manufacturing base to support scaled supply contracts with international consumer electronics original equipment manufacturers; broadened its commercial focus by entering into collaborative development programs with automotive tier-one suppliers for next-generation electric vehicle high-voltage power conversion modules; and introduced new research and development programs aimed at high-power density magnetics for renewable energy storage systems and artificial intelligence data center power supply units.