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Side-by-side financial comparison of Biogen (BIIB) and Xylem Inc. (XYL). Click either name above to swap in a different company.

Biogen is the larger business by last-quarter revenue ($2.5B vs $2.1B, roughly 1.2× Xylem Inc.). Biogen runs the higher net margin — 12.9% vs 8.9%, a 4.0% gap on every dollar of revenue. On growth, Xylem Inc. posted the faster year-over-year revenue change (2.7% vs 2.0%). Over the past eight quarters, Biogen's revenue compounded faster (0.3% CAGR vs -1.0%).

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 ...

Xylem is one of the two types of transport tissue in vascular plants, the other being phloem; both of these are part of the vascular bundle. The basic function of the xylem is to transport water upward from the roots to parts of the plants such as stems and leaves, but it also transports nutrients. The word xylem is derived from the Ancient Greek word ξύλον (xúlon), meaning "wood"; the best-known xylem tissue is wood, though it is found throughout a plant.

BIIB vs XYL — Head-to-Head

Bigger by revenue
BIIB
BIIB
1.2× larger
BIIB
$2.5B
$2.1B
XYL
Growing faster (revenue YoY)
XYL
XYL
+0.7% gap
XYL
2.7%
2.0%
BIIB
Higher net margin
BIIB
BIIB
4.0% more per $
BIIB
12.9%
8.9%
XYL
Faster 2-yr revenue CAGR
BIIB
BIIB
Annualised
BIIB
0.3%
-1.0%
XYL

Income Statement — Q1 FY2026 vs Q1 FY2026

Metric
BIIB
BIIB
XYL
XYL
Revenue
$2.5B
$2.1B
Net Profit
$319.5M
$189.0M
Gross Margin
37.8%
Operating Margin
11.5%
Net Margin
12.9%
8.9%
Revenue YoY
2.0%
2.7%
Net Profit YoY
32.8%
100.0%
EPS (diluted)
$2.15
$0.79

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
XYL
XYL
Q1 26
$2.5B
$2.1B
Q4 25
$2.3B
$2.4B
Q3 25
$2.5B
$2.3B
Q2 25
$2.6B
$2.3B
Q1 25
$2.4B
$2.1B
Q4 24
$2.5B
$2.3B
Q3 24
$2.5B
$2.1B
Q2 24
$2.5B
$2.2B
Net Profit
BIIB
BIIB
XYL
XYL
Q1 26
$319.5M
$189.0M
Q4 25
$-48.9M
$335.0M
Q3 25
$466.5M
$227.0M
Q2 25
$634.8M
$226.0M
Q1 25
$240.5M
$169.0M
Q4 24
$266.7M
$326.0M
Q3 24
$388.5M
$217.0M
Q2 24
$583.6M
$194.0M
Gross Margin
BIIB
BIIB
XYL
XYL
Q1 26
37.8%
Q4 25
78.3%
38.9%
Q3 25
73.4%
38.9%
Q2 25
77.1%
38.8%
Q1 25
74.1%
37.1%
Q4 24
76.2%
38.0%
Q3 24
74.1%
37.3%
Q2 24
77.8%
37.8%
Operating Margin
BIIB
BIIB
XYL
XYL
Q1 26
11.5%
Q4 25
-2.5%
14.7%
Q3 25
22.0%
14.7%
Q2 25
28.1%
13.3%
Q1 25
12.8%
11.2%
Q4 24
11.9%
11.8%
Q3 24
18.3%
13.3%
Q2 24
28.3%
11.7%
Net Margin
BIIB
BIIB
XYL
XYL
Q1 26
12.9%
8.9%
Q4 25
-2.1%
14.0%
Q3 25
18.4%
10.0%
Q2 25
24.0%
9.8%
Q1 25
9.9%
8.2%
Q4 24
10.9%
14.5%
Q3 24
15.8%
10.3%
Q2 24
23.7%
8.9%
EPS (diluted)
BIIB
BIIB
XYL
XYL
Q1 26
$2.15
$0.79
Q4 25
$-0.35
$1.37
Q3 25
$3.17
$0.93
Q2 25
$4.33
$0.93
Q1 25
$1.64
$0.69
Q4 24
$1.82
$1.33
Q3 24
$2.66
$0.89
Q2 24
$4.00
$0.80

Balance Sheet & Financial Strength

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

Metric
BIIB
BIIB
XYL
XYL
Cash + ST InvestmentsLiquidity on hand
$3.4B
$808.0M
Total DebtLower is stronger
$1.9B
Stockholders' EquityBook value
$18.7B
$11.0B
Total Assets
$29.5B
$17.0B
Debt / EquityLower = less leverage
0.18×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
BIIB
BIIB
XYL
XYL
Q1 26
$3.4B
$808.0M
Q4 25
$1.5B
Q3 25
$1.2B
Q2 25
$1.2B
Q1 25
$1.1B
Q4 24
$1.1B
Q3 24
$989.0M
Q2 24
$815.0M
Total Debt
BIIB
BIIB
XYL
XYL
Q1 26
$1.9B
Q4 25
$6.3B
$2.0B
Q3 25
$6.3B
$2.0B
Q2 25
$6.3B
$2.0B
Q1 25
$4.5B
$2.0B
Q4 24
$6.3B
$2.0B
Q3 24
$4.5B
Q2 24
$6.3B
Stockholders' Equity
BIIB
BIIB
XYL
XYL
Q1 26
$18.7B
$11.0B
Q4 25
$18.3B
$11.5B
Q3 25
$18.2B
$11.2B
Q2 25
$17.6B
$11.1B
Q1 25
$17.0B
$10.8B
Q4 24
$16.7B
$10.6B
Q3 24
$16.4B
$10.6B
Q2 24
$15.9B
$10.3B
Total Assets
BIIB
BIIB
XYL
XYL
Q1 26
$29.5B
$17.0B
Q4 25
$29.4B
$17.6B
Q3 25
$29.2B
$17.3B
Q2 25
$28.3B
$17.2B
Q1 25
$28.0B
$16.6B
Q4 24
$28.0B
$16.5B
Q3 24
$28.3B
$16.0B
Q2 24
$26.8B
$15.8B
Debt / Equity
BIIB
BIIB
XYL
XYL
Q1 26
0.18×
Q4 25
0.34×
0.17×
Q3 25
0.35×
0.18×
Q2 25
0.36×
0.18×
Q1 25
0.27×
0.19×
Q4 24
0.38×
0.19×
Q3 24
0.28×
Q2 24
0.40×

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
XYL
XYL
Operating Cash FlowLast quarter
Free Cash FlowOCF − Capex
$594.3M
FCF MarginFCF / Revenue
24.0%
Capex IntensityCapex / Revenue
4.2%
Cash ConversionOCF / Net Profit
TTM Free Cash FlowTrailing 4 quarters
$2.4B

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
BIIB
BIIB
XYL
XYL
Q1 26
Q4 25
$511.9M
$543.0M
Q3 25
$1.3B
$360.0M
Q2 25
$160.9M
$305.0M
Q1 25
$259.3M
$33.0M
Q4 24
$760.9M
$575.0M
Q3 24
$935.6M
$311.0M
Q2 24
$625.8M
$288.0M
Free Cash Flow
BIIB
BIIB
XYL
XYL
Q1 26
$594.3M
Q4 25
$468.0M
$460.0M
Q3 25
$1.2B
$281.0M
Q2 25
$134.3M
$207.0M
Q1 25
$222.2M
$-38.0M
Q4 24
$721.6M
$475.0M
Q3 24
$900.6M
$237.0M
Q2 24
$592.3M
$215.0M
FCF Margin
BIIB
BIIB
XYL
XYL
Q1 26
24.0%
Q4 25
20.5%
19.2%
Q3 25
48.4%
12.4%
Q2 25
5.1%
9.0%
Q1 25
9.1%
-1.8%
Q4 24
29.4%
21.1%
Q3 24
36.5%
11.3%
Q2 24
24.0%
9.9%
Capex Intensity
BIIB
BIIB
XYL
XYL
Q1 26
4.2%
Q4 25
1.9%
3.5%
Q3 25
1.8%
3.5%
Q2 25
1.0%
4.3%
Q1 25
1.5%
3.4%
Q4 24
1.6%
4.4%
Q3 24
1.4%
3.5%
Q2 24
1.4%
3.4%
Cash Conversion
BIIB
BIIB
XYL
XYL
Q1 26
Q4 25
1.62×
Q3 25
2.73×
1.59×
Q2 25
0.25×
1.35×
Q1 25
1.08×
0.20×
Q4 24
2.85×
1.76×
Q3 24
2.41×
1.43×
Q2 24
1.07×
1.48×

Financial Flow Comparison

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

Revenue Breakdown by Segment

BIIB
BIIB

Product revenue, net$1.8B71%
Royalty revenue on sales of OCREVUS$317.2M13%
Contract manufacturing, royalty and other revenue$246.9M10%
Biogen's share of pre-tax profits in the U.S. for RITUXAN, GAZYVA and LUNSUMIO$94.7M4%
Alzheimer's collaboration Revenue$59.5M2%
Other revenue from anti-CD20 therapeutic programs$7.2M0%

XYL
XYL

Revenue from products$1.8B83%
Revenue from services$368.0M17%

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