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Side-by-side financial comparison of Biogen (BIIB) and RESIDEO TECHNOLOGIES, INC. (REZI). Click either name above to swap in a different company.

Biogen is the larger business by last-quarter revenue ($2.3B vs $1.9B, roughly 1.2× RESIDEO TECHNOLOGIES, INC.). RESIDEO TECHNOLOGIES, INC. runs the higher net margin — 7.2% vs -2.1%, a 9.3% gap on every dollar of revenue. On growth, RESIDEO TECHNOLOGIES, INC. posted the faster year-over-year revenue change (2.0% vs -7.1%). Biogen produced more free cash flow last quarter ($468.0M vs $262.0M). Over the past eight quarters, RESIDEO TECHNOLOGIES, INC.'s revenue compounded faster (12.9% CAGR vs -0.2%).

Biogen Inc. is an American multinational biotechnology company based in Cambridge, Massachusetts, United States specializing in the treatment of neurological diseases. The company's primary products are dimethyl fumarate (Tecfidera), diroximel fumarate (Vumerity), interferon beta-1a (AVONEX), peginterferon beta-1a (Plegridy), and natalizumab (Tysabri), all for the treatment of multiple sclerosis ; nusinersen (Spinraza) for the treatment of spinal muscular atrophy ; omaveloxolone (Skyclarys) for ...

Resideo Technologies, Inc. is an American multinational company that was formed in 2018 out of a spin-off from Honeywell. It provides room air temperature, quality, and humidity control and security systems primarily in residential dwellings in the U.S. and internationally. The company operates in two segments: products and distribution. It manufactures and distributes smart-home and software products, including temperature and lighting control, security, and water and air monitoring. The com...

BIIB vs REZI — Head-to-Head

Bigger by revenue
BIIB
BIIB
1.2× larger
BIIB
$2.3B
$1.9B
REZI
Growing faster (revenue YoY)
REZI
REZI
+9.1% gap
REZI
2.0%
-7.1%
BIIB
Higher net margin
REZI
REZI
9.3% more per $
REZI
7.2%
-2.1%
BIIB
More free cash flow
BIIB
BIIB
$206.0M more FCF
BIIB
$468.0M
$262.0M
REZI
Faster 2-yr revenue CAGR
REZI
REZI
Annualised
REZI
12.9%
-0.2%
BIIB

Income Statement — Q4 FY2025 vs Q4 FY2025

Metric
BIIB
BIIB
REZI
REZI
Revenue
$2.3B
$1.9B
Net Profit
$-48.9M
$136.0M
Gross Margin
78.3%
29.6%
Operating Margin
-2.5%
7.4%
Net Margin
-2.1%
7.2%
Revenue YoY
-7.1%
2.0%
Net Profit YoY
-118.3%
491.3%
EPS (diluted)
$-0.35
$0.99

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
BIIB
BIIB
REZI
REZI
Q4 25
$2.3B
$1.9B
Q3 25
$2.5B
$1.9B
Q2 25
$2.6B
$1.9B
Q1 25
$2.4B
$1.8B
Q4 24
$2.5B
$1.9B
Q3 24
$2.5B
$1.8B
Q2 24
$2.5B
$1.6B
Q1 24
$2.3B
$1.5B
Net Profit
BIIB
BIIB
REZI
REZI
Q4 25
$-48.9M
$136.0M
Q3 25
$466.5M
$156.0M
Q2 25
$634.8M
$-825.0M
Q1 25
$240.5M
$6.0M
Q4 24
$266.7M
$23.0M
Q3 24
$388.5M
$20.0M
Q2 24
$583.6M
$30.0M
Q1 24
$393.4M
$43.0M
Gross Margin
BIIB
BIIB
REZI
REZI
Q4 25
78.3%
29.6%
Q3 25
73.4%
29.8%
Q2 25
77.1%
29.3%
Q1 25
74.1%
28.9%
Q4 24
76.2%
28.5%
Q3 24
74.1%
28.7%
Q2 24
77.8%
28.1%
Q1 24
76.3%
26.9%
Operating Margin
BIIB
BIIB
REZI
REZI
Q4 25
-2.5%
7.4%
Q3 25
22.0%
8.3%
Q2 25
28.1%
9.1%
Q1 25
12.8%
7.7%
Q4 24
11.9%
7.8%
Q3 24
18.3%
6.9%
Q2 24
28.3%
7.7%
Q1 24
20.3%
8.6%
Net Margin
BIIB
BIIB
REZI
REZI
Q4 25
-2.1%
7.2%
Q3 25
18.4%
8.4%
Q2 25
24.0%
-42.5%
Q1 25
9.9%
0.3%
Q4 24
10.9%
1.2%
Q3 24
15.8%
1.1%
Q2 24
23.7%
1.9%
Q1 24
17.2%
2.9%
EPS (diluted)
BIIB
BIIB
REZI
REZI
Q4 25
$-0.35
$0.99
Q3 25
$3.17
$0.85
Q2 25
$4.33
$-5.59
Q1 25
$1.64
$-0.02
Q4 24
$1.82
$0.06
Q3 24
$2.66
$0.07
Q2 24
$4.00
$0.19
Q1 24
$2.70
$0.29

Balance Sheet & Financial Strength

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

Metric
BIIB
BIIB
REZI
REZI
Cash + ST InvestmentsLiquidity on hand
$661.0M
Total DebtLower is stronger
$6.3B
$3.2B
Stockholders' EquityBook value
$18.3B
$2.9B
Total Assets
$29.4B
$8.4B
Debt / EquityLower = less leverage
0.34×
1.11×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
BIIB
BIIB
REZI
REZI
Q4 25
$661.0M
Q3 25
$345.0M
Q2 25
$753.0M
Q1 25
$577.0M
Q4 24
$692.0M
Q3 24
$531.0M
Q2 24
$413.0M
Q1 24
$603.0M
Total Debt
BIIB
BIIB
REZI
REZI
Q4 25
$6.3B
$3.2B
Q3 25
$6.3B
$3.2B
Q2 25
$6.3B
$2.0B
Q1 25
$4.5B
$2.0B
Q4 24
$6.3B
$2.0B
Q3 24
$4.5B
$2.0B
Q2 24
$6.3B
$2.0B
Q1 24
$6.3B
$1.4B
Stockholders' Equity
BIIB
BIIB
REZI
REZI
Q4 25
$18.3B
$2.9B
Q3 25
$18.2B
$2.8B
Q2 25
$17.6B
$2.6B
Q1 25
$17.0B
$3.3B
Q4 24
$16.7B
$3.3B
Q3 24
$16.4B
$3.4B
Q2 24
$15.9B
$3.3B
Q1 24
$15.2B
$2.8B
Total Assets
BIIB
BIIB
REZI
REZI
Q4 25
$29.4B
$8.4B
Q3 25
$29.2B
$8.2B
Q2 25
$28.3B
$8.5B
Q1 25
$28.0B
$8.1B
Q4 24
$28.0B
$8.2B
Q3 24
$28.3B
$8.1B
Q2 24
$26.8B
$8.0B
Q1 24
$26.6B
$6.5B
Debt / Equity
BIIB
BIIB
REZI
REZI
Q4 25
0.34×
1.11×
Q3 25
0.35×
1.17×
Q2 25
0.36×
0.77×
Q1 25
0.27×
0.60×
Q4 24
0.38×
0.61×
Q3 24
0.28×
0.60×
Q2 24
0.40×
0.61×
Q1 24
0.41×
0.51×

Cash Flow & Capital Efficiency

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

Metric
BIIB
BIIB
REZI
REZI
Operating Cash FlowLast quarter
$511.9M
$299.0M
Free Cash FlowOCF − Capex
$468.0M
$262.0M
FCF MarginFCF / Revenue
20.5%
13.8%
Capex IntensityCapex / Revenue
1.9%
2.0%
Cash ConversionOCF / Net Profit
2.20×
TTM Free Cash FlowTrailing 4 quarters
$2.1B
$-1.3B

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
BIIB
BIIB
REZI
REZI
Q4 25
$511.9M
$299.0M
Q3 25
$1.3B
$-1.6B
Q2 25
$160.9M
$200.0M
Q1 25
$259.3M
$-65.0M
Q4 24
$760.9M
$203.0M
Q3 24
$935.6M
$147.0M
Q2 24
$625.8M
$92.0M
Q1 24
$553.2M
$2.0M
Free Cash Flow
BIIB
BIIB
REZI
REZI
Q4 25
$468.0M
$262.0M
Q3 25
$1.2B
$-1.6B
Q2 25
$134.3M
$180.0M
Q1 25
$222.2M
$-96.0M
Q4 24
$721.6M
$181.0M
Q3 24
$900.6M
$125.0M
Q2 24
$592.3M
$77.0M
Q1 24
$507.3M
$-19.0M
FCF Margin
BIIB
BIIB
REZI
REZI
Q4 25
20.5%
13.8%
Q3 25
48.4%
-85.8%
Q2 25
5.1%
9.3%
Q1 25
9.1%
-5.4%
Q4 24
29.4%
9.7%
Q3 24
36.5%
6.8%
Q2 24
24.0%
4.8%
Q1 24
22.1%
-1.3%
Capex Intensity
BIIB
BIIB
REZI
REZI
Q4 25
1.9%
2.0%
Q3 25
1.8%
1.5%
Q2 25
1.0%
1.0%
Q1 25
1.5%
1.8%
Q4 24
1.6%
1.2%
Q3 24
1.4%
1.2%
Q2 24
1.4%
0.9%
Q1 24
2.0%
1.4%
Cash Conversion
BIIB
BIIB
REZI
REZI
Q4 25
2.20×
Q3 25
2.73×
-10.07×
Q2 25
0.25×
Q1 25
1.08×
-10.83×
Q4 24
2.85×
8.83×
Q3 24
2.41×
7.35×
Q2 24
1.07×
3.07×
Q1 24
1.41×
0.05×

Financial Flow Comparison

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

Revenue Breakdown by Segment

BIIB
BIIB

Products$1.7B73%
Tysabri Product$244.5M11%
AVONEX$119.2M5%
SKYCLARYS$88.9M4%
Alzheimers Collaboration$47.1M2%
IMRALDI$43.5M2%
TECFIDERA$36.9M2%
PLEGRIDY$24.7M1%
QALSODY$7.8M0%
BYOOVIZ$4.3M0%

REZI
REZI

ADI Global Distribution Segment$1.2B62%
Safety And Security$257.0M14%
Air$211.0M11%
Energy Service$153.0M8%
Public Utilities Inventory Water$91.0M5%

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