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Side-by-side financial comparison of Iridium Communications Inc. (IRDM) and SL GREEN REALTY CORP (SLG). Click either name above to swap in a different company.

SL GREEN REALTY CORP is the larger business by last-quarter revenue ($276.5M vs $219.1M, roughly 1.3× Iridium Communications Inc.). Iridium Communications Inc. runs the higher net margin — 9.9% vs -36.5%, a 46.3% gap on every dollar of revenue. On growth, SL GREEN REALTY CORP posted the faster year-over-year revenue change (12.4% vs 1.9%). Over the past eight quarters, SL GREEN REALTY CORP's revenue compounded faster (21.3% CAGR vs 4.4%).

Iridium Communications Inc. is a publicly traded American company headquartered in McLean, Virginia, United States. Iridium operates the Iridium satellite constellation, a system of 80 satellites: 66 are active satellites and the remaining fourteen function as in-orbit spares. Iridium Satellites are used for worldwide voice and data communication from handheld satellite phones, satellite messenger communication devices and integrated transceivers, as well as for two-way satellite messaging se...

SL Green Realty Corp. is a real estate investment trust that primarily invests in office buildings and shopping centers in New York City. As of December 31, 2024, the company owned interests in 39 properties comprising 25,297,353 square feet, primarily in Manhattan. It has been referred to as "New York City’s largest office landlord".

IRDM vs SLG — Head-to-Head

Bigger by revenue
SLG
SLG
1.3× larger
SLG
$276.5M
$219.1M
IRDM
Growing faster (revenue YoY)
SLG
SLG
+10.5% gap
SLG
12.4%
1.9%
IRDM
Higher net margin
IRDM
IRDM
46.3% more per $
IRDM
9.9%
-36.5%
SLG
Faster 2-yr revenue CAGR
SLG
SLG
Annualised
SLG
21.3%
4.4%
IRDM

Income Statement — Q1 FY2026 vs Q4 FY2025

Metric
IRDM
IRDM
SLG
SLG
Revenue
$219.1M
$276.5M
Net Profit
$21.6M
$-100.8M
Gross Margin
Operating Margin
23.2%
64.2%
Net Margin
9.9%
-36.5%
Revenue YoY
1.9%
12.4%
Net Profit YoY
-870.0%
EPS (diluted)
$-1.49

Green = leading value per metric. Periods may differ when fiscal calendars don't align.

8-Quarter Revenue & Profit Trend

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

Revenue
IRDM
IRDM
SLG
SLG
Q1 26
$219.1M
Q4 25
$212.9M
$276.5M
Q3 25
$226.9M
$244.8M
Q2 25
$216.9M
$241.9M
Q1 25
$214.9M
$239.8M
Q4 24
$213.0M
$245.9M
Q3 24
$212.8M
$229.7M
Q2 24
$201.1M
$222.8M
Net Profit
IRDM
IRDM
SLG
SLG
Q1 26
$21.6M
Q4 25
$24.9M
$-100.8M
Q3 25
$37.1M
$28.6M
Q2 25
$22.0M
$-7.4M
Q1 25
$30.4M
$-17.3M
Q4 24
$36.3M
$19.1M
Q3 24
$24.4M
$-9.5M
Q2 24
$32.3M
$1.6M
Operating Margin
IRDM
IRDM
SLG
SLG
Q1 26
23.2%
Q4 25
25.9%
64.2%
Q3 25
30.9%
85.5%
Q2 25
23.2%
53.4%
Q1 25
28.1%
56.7%
Q4 24
24.5%
59.8%
Q3 24
25.8%
65.1%
Q2 24
21.7%
79.2%
Net Margin
IRDM
IRDM
SLG
SLG
Q1 26
9.9%
Q4 25
11.7%
-36.5%
Q3 25
16.4%
11.7%
Q2 25
10.1%
-3.0%
Q1 25
14.2%
-7.2%
Q4 24
17.1%
7.8%
Q3 24
11.5%
-4.2%
Q2 24
16.1%
0.7%
EPS (diluted)
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
$0.24
$-1.49
Q3 25
$0.35
$0.34
Q2 25
$0.20
$-0.16
Q1 25
$0.27
$-0.30
Q4 24
$0.30
$0.13
Q3 24
$0.21
$-0.21
Q2 24
$0.27
$-0.04

Balance Sheet & Financial Strength

Snapshot of each company's liquidity, leverage and book value from the latest quarter.

Metric
IRDM
IRDM
SLG
SLG
Cash + ST InvestmentsLiquidity on hand
$155.7M
Total DebtLower is stronger
Stockholders' EquityBook value
$3.7B
Total Assets
$11.1B
Debt / EquityLower = less leverage

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
$96.5M
$155.7M
Q3 25
$88.5M
$187.0M
Q2 25
$79.3M
$182.9M
Q1 25
$50.9M
$180.1M
Q4 24
$93.5M
$184.3M
Q3 24
$159.6M
$188.2M
Q2 24
$63.5M
$199.5M
Total Debt
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
$1.8B
Q3 25
Q2 25
Q1 25
Q4 24
$1.8B
Q3 24
Q2 24
Stockholders' Equity
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
$462.6M
$3.7B
Q3 25
$450.5M
$3.8B
Q2 25
$473.6M
$3.8B
Q1 25
$518.4M
$3.8B
Q4 24
$576.6M
$4.0B
Q3 24
$663.8M
$3.6B
Q2 24
$786.7M
$3.7B
Total Assets
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
$2.5B
$11.1B
Q3 25
$2.6B
$11.1B
Q2 25
$2.6B
$11.3B
Q1 25
$2.6B
$11.4B
Q4 24
$2.7B
$10.5B
Q3 24
$2.8B
$10.2B
Q2 24
$2.7B
$9.5B
Debt / Equity
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
3.80×
Q3 25
Q2 25
Q1 25
Q4 24
3.05×
Q3 24
Q2 24

Cash Flow & Capital Efficiency

How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.

Metric
IRDM
IRDM
SLG
SLG
Operating Cash FlowLast quarter
$82.9M
Free Cash FlowOCF − Capex
FCF MarginFCF / Revenue
Capex IntensityCapex / Revenue
13.7%
Cash ConversionOCF / Net Profit
TTM Free Cash FlowTrailing 4 quarters

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
$108.6M
$82.9M
Q3 25
$100.8M
$-6.8M
Q2 25
$129.6M
$54.5M
Q1 25
$61.1M
$6.7M
Q4 24
$104.8M
$129.6M
Q3 24
$118.6M
$16.7M
Q2 24
$81.1M
$79.4M
Free Cash Flow
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
$75.1M
Q3 25
$79.2M
Q2 25
$108.9M
Q1 25
$36.5M
Q4 24
$80.5M
Q3 24
$100.0M
Q2 24
$68.7M
FCF Margin
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
35.3%
Q3 25
34.9%
Q2 25
50.2%
Q1 25
17.0%
Q4 24
37.8%
Q3 24
47.0%
Q2 24
34.2%
Capex Intensity
IRDM
IRDM
SLG
SLG
Q1 26
13.7%
Q4 25
15.7%
Q3 25
9.5%
Q2 25
9.5%
Q1 25
11.4%
Q4 24
11.4%
Q3 24
8.7%
Q2 24
6.2%
Cash Conversion
IRDM
IRDM
SLG
SLG
Q1 26
Q4 25
4.37×
Q3 25
2.71×
-0.24×
Q2 25
5.90×
Q1 25
2.01×
Q4 24
2.88×
6.77×
Q3 24
4.85×
Q2 24
2.51×
50.33×

Financial Flow Comparison

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

Revenue Breakdown by Segment

IRDM
IRDM

Voice and data$57.4M26%
IoT data (2)$46.0M21%
Government$39.5M18%
Government service revenue (5)$27.6M13%
Subscriber equipment$20.2M9%
Hosted payload and other data service (4)$14.8M7%
Broadband (3)$12.2M6%
Commercial$1.3M1%

SLG
SLG

Real Estate Segment$223.1M81%
Other$35.9M13%
Debt And Preferred Equity Segment$17.4M6%

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