T vs. TIGO: AT&T vs. Millicom International Cellular Stock Comparison

November 11, 2026

How do AT&T (T) and Millicom International Cellular (TIGO) stack up? This page sets them side by side across company profile, performance and risk, profitability, growth, financial strength, dividends, and valuation, with selected fundamentals also measured against each stock's industry-group peers.

Company Profile

AT&T (T) and Millicom International Cellular (TIGO) both fall under the Telecommunication Services industry group, but T is classified in Diversified Telecommunication Services while TIGO is classified in Wireless Telecommunication Services.

Company profile comparison for AT&T (T) and Millicom International Cellular (TIGO)
Profile Item	T	TIGO
Name	AT&T Inc.	Millicom International Cellular S.A.
Country/Region	United States	Luxembourg
GICS Sector	Communication Services	Communication Services
GICS Industry Group	Telecommunication Services	Telecommunication Services
GICS Industry	Diversified Telecommunication Services	Wireless Telecommunication Services
GICS Sub-Industry	Integrated Telecommunication Services	Wireless Telecommunication Services
Market Capitalization	145.71 billion USD	13.96 billion USD
Currency	USD	USD
Exchange	NYSE	Nasdaq
Listing Date	November 21, 1983	January 9, 2019
Security Type	Common Stock	Common Stock

Price Performance

Cumulative Growth

TIGO

GSPC

AT&T (T) vs. Millicom International Cellular (TIGO), with S&P 500 (GSPC) for reference: Growth of a $10,000 investment over the past five years. Adjusted for dividends and splits.

Trailing Returns

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Trailing total returns for AT&T (T) and Millicom International Cellular (TIGO). Returns over one year are annualized.

Calendar-Year Returns

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Calendar-year total returns for AT&T (T) and Millicom International Cellular (TIGO). Each bar is that year's total return, measured year-end to year-end.

Performance Metrics

Price performance metrics for AT&T (T) and Millicom International Cellular (TIGO)
Metric	T	TIGO
Total Return (1Y)	-8.35%	88.87%
Total Return (3Y, Annualized)	17.33%	85.47%
Total Return (5Y, Annualized)	9.18%	23.36%

Risk Profile

Drawdown History

TIGO

GSPC

AT&T (T) vs. Millicom International Cellular (TIGO), with S&P 500 (GSPC) for reference: Drawdown from the running peak over the past five years. Each line shows the decline from its prior peak; 0% marks a new high.

Return Distribution

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Distribution of monthly total returns for AT&T (T) and Millicom International Cellular (TIGO). Each bar is the share of months whose return fell in that 5% bucket.

Risk Metrics

AT&T (T) is heavily traded at around 42.07M shares per day, whereas Millicom International Cellular (TIGO) sees a more moderate 924.74K — larger orders in the latter may require more patience and tighter control over order sizing.

Risk profile metrics for AT&T (T) and Millicom International Cellular (TIGO)
Metric	T	TIGO
Volatility (1Y, Annualized)	28.75%	41.65%
Beta (5Y)	0.27	0.96
Max Drawdown (5Y)	-32.01%	-71.26%
Avg. Volume (3M)	42.07M	924.74K

Risk-Adjusted Performance

Risk-Return Positioning

T and TIGO are plotted by 1-year volatility (risk) and 1-year return. The dashed Capital Allocation Line runs from the risk-free rate through the shared industry median.

Risk-Adjusted Metrics

Risk-adjusted metrics for AT&T (T) and Millicom International Cellular (TIGO)
Metric	T	TIGO
Sharpe Ratio (1Y)	-0.44	2.03
Sortino Ratio (1Y)	-0.57	3.02

Profitability

ROE (TTM)

Millicom International Cellular (TIGO) at 19.54% sits in the top ROE quartile, while AT&T (T) at 11.61% is closer to the peer norm — stronger capital efficiency for TIGO.

T

Telecommunication Services industry group

11.61%

Max: 31.74%
Q3: 17.02%
T: 11.61%
Median: 7.32%
Q1: -5.16%
Min: -20.26%

TIGO

Telecommunication Services industry group

19.54%

Max: 31.74%
TIGO: 19.54%
Q3: 17.02%
Median: 7.32%
Q1: -5.16%
Min: -20.26%

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their ROE against the Telecommunication Services industry group benchmark.

Net Margin (TTM)

Both AT&T (T) at 10.19% and Millicom International Cellular (TIGO) at 7.01% keep about the typical share of revenue as profit for their industries — neither bottom line stands out from peers.

T

Telecommunication Services industry group

10.19%

Max: 30.45%
Q3: 11.78%
T: 10.19%
Median: 7.20%
Q1: -3.86%
Min: -18.49%

TIGO

Telecommunication Services industry group

7.01%

Max: 30.45%
Q3: 11.78%
Median: 7.20%
TIGO: 7.01%
Q1: -3.86%
Min: -18.49%

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their net margin against the Telecommunication Services industry group benchmark.

Operating Margin (TTM)

Both AT&T (T) at 24.65% and Millicom International Cellular (TIGO) at 26.63% convert sales into operating profit at a top-quartile rate, pointing to tighter cost discipline before financing and tax.

T

Telecommunication Services industry group

24.65%

Max: 35.53%
T: 24.65%
Q3: 22.79%
Median: 12.87%
Q1: 0.82%
Min: -29.20%

TIGO

Telecommunication Services industry group

26.63%

Max: 35.53%
TIGO: 26.63%
Q3: 22.79%
Median: 12.87%
Q1: 0.82%
Min: -29.20%

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their operating margin against the Telecommunication Services industry group benchmark.

Profitability Metrics

Profitability metrics for AT&T (T) and Millicom International Cellular (TIGO)
Metric	T	TIGO
ROE (TTM)	11.61%	19.54%
ROA (TTM)	4.19%	6.70%
Net Margin (TTM)	10.19%	7.01%
Operating Margin (TTM)	24.65%	26.63%
Gross Margin (TTM)	59.74%	76.25%

Growth

Revenue Growth

AT&T (T) at 2.71% is around its peer norm for revenue growth, while Millicom International Cellular (TIGO) at 0.26% drops into the bottom quartile, signaling weaker demand or pricing momentum.

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their Revenue Growth across different time periods.

EPS Growth

Both companies show strong earnings momentum, but Millicom International Cellular (TIGO) at 438.36% is the standout with EPS growth above its industry range; AT&T (T) at 104.03% also sits in the top quartile.

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their EPS Growth across different time periods.

Growth Metrics

Growth metrics for AT&T (T) and Millicom International Cellular (TIGO)
Metric	T	TIGO
Revenue Growth (YoY)	2.71%	0.26%
Revenue Growth (3Y CAGR)	1.34%	1.14%
EPS Growth (YoY)	104.03%	438.36%
EPS Growth (3Y CAGR)	--	83.60%

Financial Strength

Current Ratio (MRQ)

AT&T (T) at 0.87 keeps current ratio within its industry’s typical mid-range, while Millicom International Cellular (TIGO) at 0.56 runs in the tighter-liquidity quartile — a thinner cushion against current liabilities for TIGO.

T

Telecommunication Services industry group

0.87

Max: 2.85
Q3: 1.64
Median: 0.97
T: 0.87
Q1: 0.78
Min: 0.26

TIGO

Telecommunication Services industry group

0.56

Max: 2.85
Q3: 1.64
Median: 0.97
Q1: 0.78
TIGO: 0.56
Min: 0.26

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their current ratio against the Telecommunication Services industry group benchmark.

Debt / Equity (MRQ)

AT&T (T) at 1.45 is near its industry mid-range for debt-to-equity ratio, while Millicom International Cellular (TIGO) at 5.29 sits above its benchmark range, pointing to a heavier debt load relative to equity.

T

Telecommunication Services industry group

1.45

Max: 3.94
Q3: 2.11
T: 1.45
Median: 1.32
Q1: 0.65
Min: 0.00

TIGO

Telecommunication Services industry group

5.29

TIGO: 5.29
Max: 3.94
Q3: 2.11
Median: 1.32
Q1: 0.65
Min: 0.00

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their debt-to-equity ratio against the Telecommunication Services industry group benchmark.

Financial Strength Metrics

Financial strength metrics for AT&T (T) and Millicom International Cellular (TIGO)
Metric	T	TIGO
Current Ratio (MRQ)	0.87	0.56
Debt / Equity (MRQ)	1.45	5.29
Net Debt / EBITDA	3.70	3.15

Dividends

Dividend Yield (TTM)

Both AT&T (T) at 5.09% and Millicom International Cellular (TIGO) at 3.79% offer top-quartile dividend income relative to share price within their industries.

T

Telecommunication Services industry group

5.09%

Max: 6.10%
T: 5.09%
Q3: 2.63%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

TIGO

Telecommunication Services industry group

3.79%

Max: 6.10%
TIGO: 3.79%
Q3: 2.63%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their dividend yield against the Telecommunication Services industry group benchmark.

Dividend Payout Ratio (TTM)

AT&T (T) at 59.36% pays out a band-typical share of earnings, while Millicom International Cellular (TIGO) at 88.91% distributes more than its industry norm — less retained, thinner cover.

T

Telecommunication Services industry group

59.36%

Max: 121.72%
Q3: 68.18%
T: 59.36%
Median: 4.06%
Q1: 0.00%
Min: 0.00%

TIGO

Telecommunication Services industry group

88.91%

Max: 121.72%
TIGO: 88.91%
Q3: 68.18%
Median: 4.06%
Q1: 0.00%
Min: 0.00%

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their payout ratio against the Telecommunication Services industry group benchmark.

Dividend Metrics

Dividend metrics for AT&T (T) and Millicom International Cellular (TIGO)
Metric	T	TIGO
Dividend Yield (TTM)	5.09%	3.79%
Dividend Payout Ratio (TTM)	59.36%	88.91%

Valuation

P/E Ratio (TTM)

AT&T (T) at 11.57 is near its industry’s usual P/E ratio, while Millicom International Cellular (TIGO) at 24.70 sits in the richer quartile — TIGO needs stronger growth or earnings quality to justify the premium.

T

Telecommunication Services industry group

11.57

Max: 30.40
Q3: 23.75
Median: 13.30
T: 11.57
Q1: 8.65
Min: 2.50

TIGO

Telecommunication Services industry group

24.70

Max: 30.40
TIGO: 24.70
Q3: 23.75
Median: 13.30
Q1: 8.65
Min: 2.50

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their P/E ratio against the Telecommunication Services industry group benchmark.

P/S Ratio (TTM)

On P/S ratio, both AT&T (T) at 1.13 and Millicom International Cellular (TIGO) at 1.72 are priced roughly in line with their industries — neither looks cheap nor rich on a sales basis.

T

Telecommunication Services industry group

1.13

Max: 3.01
Q3: 1.73
T: 1.13
Median: 0.81
Q1: 0.36
Min: 0.00

TIGO

Telecommunication Services industry group

1.72

Max: 3.01
Q3: 1.73
TIGO: 1.72
Median: 0.81
Q1: 0.36
Min: 0.00

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their P/S ratio against the Telecommunication Services industry group benchmark.

P/B Ratio (MRQ)

AT&T (T) at 1.37 is valued about in line with its industry on P/B ratio, while Millicom International Cellular (TIGO) at 6.24 carries an above-peer premium to book — TIGO is pricier on assets.

T

Telecommunication Services industry group

1.37

Max: 8.10
Q3: 3.98
Median: 1.53
T: 1.37
Q1: 0.65
Min: -2.39

TIGO

Telecommunication Services industry group

6.24

Max: 8.10
TIGO: 6.24
Q3: 3.98
Median: 1.53
Q1: 0.65
Min: -2.39

AT&T (T) vs. Millicom International Cellular (TIGO): A comparison of their P/B ratio against the Telecommunication Services industry group benchmark.

Valuation Metrics

Valuation metrics for AT&T (T) and Millicom International Cellular (TIGO)
Metric	T	TIGO
P/E Ratio (TTM)	11.57	24.70
P/S Ratio (TTM)	1.13	1.72
P/B Ratio (MRQ)	1.37	6.24
Free Cash Flow Yield (TTM)	8.21%	14.20%