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Side-by-side financial comparison of KT CORP (KT) and Lumen Technologies, Inc. (LUMN). Click either name above to swap in a different company.

KT Corporation, formerly Korea Telecom, is a South Korean telecommunications company, mobile network operator (MNO) and mobile virtual network operator (MVNO). KT is the large wireless carrier in South Korea, with 13.5 million subscribers as of Q4 2023.

Lumen Technologies, Inc. is an American telecommunications company headquartered in Monroe, Louisiana. It offers network, security, cloud, voice, and other managed communications services through its fiber optic and copper networks, data centers and cloud computing services. The company has been included in the S&P 600 index since March 2023, and was previously listed among the S&P 500.

8-Quarter Revenue & Profit Trend

Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.

Revenue
KT
KT
LUMN
LUMN
Q4 25
$2.7B
Q3 25
$2.8B
Q2 25
$2.9B
Q1 25
$2.9B
Q4 24
$3.1B
Q3 24
$3.0B
Q2 24
$3.0B
Q1 24
$3.1B
Net Profit
KT
KT
LUMN
LUMN
Q4 25
$-2.0M
Q3 25
$-621.0M
Q2 25
$-915.0M
Q1 25
$-201.0M
Q4 24
$85.0M
Q3 24
$-148.0M
Q2 24
$-49.0M
Q1 24
$57.0M
Gross Margin
KT
KT
LUMN
LUMN
Q4 25
40.7%
Q3 25
39.4%
Q2 25
43.4%
Q1 25
42.0%
Q4 24
44.7%
Q3 24
43.0%
Q2 24
45.2%
Q1 24
46.0%
Operating Margin
KT
KT
LUMN
LUMN
Q4 25
-7.3%
Q3 25
-4.1%
Q2 25
-21.0%
Q1 25
3.7%
Q4 24
5.0%
Q3 24
4.2%
Q2 24
4.5%
Q1 24
1.5%
Net Margin
KT
KT
LUMN
LUMN
Q4 25
-0.1%
Q3 25
-22.1%
Q2 25
-31.9%
Q1 25
-6.9%
Q4 24
2.8%
Q3 24
-5.0%
Q2 24
-1.6%
Q1 24
1.9%
EPS (diluted)
KT
KT
LUMN
LUMN
Q4 25
$-0.01
Q3 25
$-0.62
Q2 25
$-0.92
Q1 25
$-0.20
Q4 24
$0.08
Q3 24
$-0.15
Q2 24
$-0.05
Q1 24
$0.06

Financial Flow Comparison

Revenue → gross profit → operating profit → net profit for each company.

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