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Side-by-side financial comparison of Biogen (BIIB) and Simon Property Group (SPG). Click either name above to swap in a different company.

Biogen is the larger business by last-quarter revenue ($2.5B vs $1.8B, roughly 1.4× Simon Property Group). Simon Property Group runs the higher net margin — 197.6% vs 12.9%, a 184.7% gap on every dollar of revenue. On growth, Simon Property Group posted the faster year-over-year revenue change (13.2% vs 2.0%). Simon Property Group produced more free cash flow last quarter ($948.8M vs $594.3M). Over the past eight quarters, Simon Property Group's revenue compounded faster (11.4% CAGR vs 0.3%).

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 ...

Simon Media Properties, LLC, doing business as Simon Property Group, Inc., is an American real estate investment trust that invests in shopping malls, outlet centers, and community/lifestyle centers. It is the largest owner of shopping malls in the United States and is headquartered in Indianapolis, Indiana. As of December 31, 2024, it owned interests in 232 properties.

BIIB vs SPG — Head-to-Head

Bigger by revenue
BIIB
BIIB
1.4× larger
BIIB
$2.5B
$1.8B
SPG
Growing faster (revenue YoY)
SPG
SPG
+11.2% gap
SPG
13.2%
2.0%
BIIB
Higher net margin
SPG
SPG
184.7% more per $
SPG
197.6%
12.9%
BIIB
More free cash flow
SPG
SPG
$354.5M more FCF
SPG
$948.8M
$594.3M
BIIB
Faster 2-yr revenue CAGR
SPG
SPG
Annualised
SPG
11.4%
0.3%
BIIB

Income Statement — Q1 FY2026 vs Q4 FY2025

Metric
BIIB
BIIB
SPG
SPG
Revenue
$2.5B
$1.8B
Net Profit
$319.5M
$3.5B
Gross Margin
Operating Margin
49.7%
Net Margin
12.9%
197.6%
Revenue YoY
2.0%
13.2%
Net Profit YoY
32.8%
358.7%
EPS (diluted)
$2.15
$9.34

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
SPG
SPG
Q1 26
$2.5B
Q4 25
$2.3B
$1.8B
Q3 25
$2.5B
$1.6B
Q2 25
$2.6B
$1.5B
Q1 25
$2.4B
$1.5B
Q4 24
$2.5B
$1.6B
Q3 24
$2.5B
$1.5B
Q2 24
$2.5B
$1.5B
Net Profit
BIIB
BIIB
SPG
SPG
Q1 26
$319.5M
Q4 25
$-48.9M
$3.5B
Q3 25
$466.5M
$702.7M
Q2 25
$634.8M
$643.7M
Q1 25
$240.5M
$477.9M
Q4 24
$266.7M
$771.8M
Q3 24
$388.5M
$546.7M
Q2 24
$583.6M
$569.4M
Gross Margin
BIIB
BIIB
SPG
SPG
Q1 26
Q4 25
78.3%
Q3 25
73.4%
Q2 25
77.1%
Q1 25
74.1%
Q4 24
76.2%
Q3 24
74.1%
Q2 24
77.8%
Operating Margin
BIIB
BIIB
SPG
SPG
Q1 26
Q4 25
-2.5%
49.7%
Q3 25
22.0%
50.8%
Q2 25
28.1%
49.7%
Q1 25
12.8%
49.4%
Q4 24
11.9%
52.8%
Q3 24
18.3%
51.9%
Q2 24
28.3%
51.7%
Net Margin
BIIB
BIIB
SPG
SPG
Q1 26
12.9%
Q4 25
-2.1%
197.6%
Q3 25
18.4%
43.9%
Q2 25
24.0%
43.0%
Q1 25
9.9%
32.4%
Q4 24
10.9%
48.8%
Q3 24
15.8%
36.9%
Q2 24
23.7%
39.0%
EPS (diluted)
BIIB
BIIB
SPG
SPG
Q1 26
$2.15
Q4 25
$-0.35
$9.34
Q3 25
$3.17
$1.86
Q2 25
$4.33
$1.70
Q1 25
$1.64
$1.27
Q4 24
$1.82
$2.04
Q3 24
$2.66
$1.46
Q2 24
$4.00
$1.51

Balance Sheet & Financial Strength

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

Metric
BIIB
BIIB
SPG
SPG
Cash + ST InvestmentsLiquidity on hand
$3.4B
$823.1M
Total DebtLower is stronger
$28.4B
Stockholders' EquityBook value
$18.7B
$5.2B
Total Assets
$29.5B
$40.6B
Debt / EquityLower = less leverage
5.46×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
BIIB
BIIB
SPG
SPG
Q1 26
$3.4B
Q4 25
$823.1M
Q3 25
$1.6B
Q2 25
$1.2B
Q1 25
$1.4B
Q4 24
$1.4B
Q3 24
$2.5B
Q2 24
$2.5B
Total Debt
BIIB
BIIB
SPG
SPG
Q1 26
Q4 25
$6.3B
$28.4B
Q3 25
$6.3B
$25.8B
Q2 25
$6.3B
$25.4B
Q1 25
$4.5B
$24.8B
Q4 24
$6.3B
$24.3B
Q3 24
$4.5B
$25.4B
Q2 24
$6.3B
$25.3B
Stockholders' Equity
BIIB
BIIB
SPG
SPG
Q1 26
$18.7B
Q4 25
$18.3B
$5.2B
Q3 25
$18.2B
$2.3B
Q2 25
$17.6B
$2.5B
Q1 25
$17.0B
$2.6B
Q4 24
$16.7B
$2.9B
Q3 24
$16.4B
$2.7B
Q2 24
$15.9B
$2.9B
Total Assets
BIIB
BIIB
SPG
SPG
Q1 26
$29.5B
Q4 25
$29.4B
$40.6B
Q3 25
$29.2B
$33.6B
Q2 25
$28.3B
$33.3B
Q1 25
$28.0B
$32.5B
Q4 24
$28.0B
$32.4B
Q3 24
$28.3B
$33.3B
Q2 24
$26.8B
$33.4B
Debt / Equity
BIIB
BIIB
SPG
SPG
Q1 26
Q4 25
0.34×
5.46×
Q3 25
0.35×
10.98×
Q2 25
0.36×
10.36×
Q1 25
0.27×
9.50×
Q4 24
0.38×
8.25×
Q3 24
0.28×
9.37×
Q2 24
0.40×
8.59×

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
SPG
SPG
Operating Cash FlowLast quarter
$1.2B
Free Cash FlowOCF − Capex
$594.3M
$948.8M
FCF MarginFCF / Revenue
24.0%
53.0%
Capex IntensityCapex / Revenue
14.2%
Cash ConversionOCF / Net Profit
0.34×
TTM Free Cash FlowTrailing 4 quarters
$2.4B
$3.2B

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
BIIB
BIIB
SPG
SPG
Q1 26
Q4 25
$511.9M
$1.2B
Q3 25
$1.3B
$890.3M
Q2 25
$160.9M
$1.2B
Q1 25
$259.3M
$827.2M
Q4 24
$760.9M
$1.1B
Q3 24
$935.6M
$892.9M
Q2 24
$625.8M
$1.1B
Free Cash Flow
BIIB
BIIB
SPG
SPG
Q1 26
$594.3M
Q4 25
$468.0M
$948.8M
Q3 25
$1.2B
$685.0M
Q2 25
$134.3M
$971.3M
Q1 25
$222.2M
$597.0M
Q4 24
$721.6M
$867.7M
Q3 24
$900.6M
$706.5M
Q2 24
$592.3M
$874.8M
FCF Margin
BIIB
BIIB
SPG
SPG
Q1 26
24.0%
Q4 25
20.5%
53.0%
Q3 25
48.4%
42.8%
Q2 25
5.1%
64.8%
Q1 25
9.1%
40.5%
Q4 24
29.4%
54.8%
Q3 24
36.5%
47.7%
Q2 24
24.0%
60.0%
Capex Intensity
BIIB
BIIB
SPG
SPG
Q1 26
Q4 25
1.9%
14.2%
Q3 25
1.8%
12.8%
Q2 25
1.0%
16.3%
Q1 25
1.5%
15.6%
Q4 24
1.6%
13.8%
Q3 24
1.4%
12.6%
Q2 24
1.4%
12.9%
Cash Conversion
BIIB
BIIB
SPG
SPG
Q1 26
Q4 25
0.34×
Q3 25
2.73×
1.27×
Q2 25
0.25×
1.89×
Q1 25
1.08×
1.73×
Q4 24
2.85×
1.41×
Q3 24
2.41×
1.63×
Q2 24
1.07×
1.87×

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%

SPG
SPG

Real Estate Segment$1.7B95%
Other$86.3M5%

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