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

Kellanova is the larger business by last-quarter revenue ($3.3B vs $2.5B, roughly 1.3× Biogen). Biogen runs the higher net margin — 12.9% vs 9.5%, a 3.4% gap on every dollar of revenue. On growth, Biogen posted the faster year-over-year revenue change (2.0% vs 0.8%). Biogen produced more free cash flow last quarter ($594.3M vs $359.0M). Over the past eight quarters, Biogen's revenue compounded faster (0.3% CAGR vs -9.0%).

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 ...

Kellanova, formerly known as the Kellogg Company, is an American multinational food manufacturing company owned by Mars Inc. headquartered in Chicago, Illinois. The renaming took effect on October 2, 2023, and the company's North American cereal operations were spun off to form the WK Kellogg Co at the same time.

BIIB vs K — Head-to-Head

Bigger by revenue
K
K
1.3× larger
K
$3.3B
$2.5B
BIIB
Growing faster (revenue YoY)
BIIB
BIIB
+1.2% gap
BIIB
2.0%
0.8%
K
Higher net margin
BIIB
BIIB
3.4% more per $
BIIB
12.9%
9.5%
K
More free cash flow
BIIB
BIIB
$235.3M more FCF
BIIB
$594.3M
$359.0M
K
Faster 2-yr revenue CAGR
BIIB
BIIB
Annualised
BIIB
0.3%
-9.0%
K

Income Statement — Q1 FY2026 vs Q3 FY2025

Metric
BIIB
BIIB
K
K
Revenue
$2.5B
$3.3B
Net Profit
$319.5M
$309.0M
Gross Margin
33.3%
Operating Margin
13.9%
Net Margin
12.9%
9.5%
Revenue YoY
2.0%
0.8%
Net Profit YoY
32.8%
-15.8%
EPS (diluted)
$2.15
$0.88

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
K
K
Q1 26
$2.5B
Q4 25
$2.3B
Q3 25
$2.5B
$3.3B
Q2 25
$2.6B
$3.2B
Q1 25
$2.4B
$3.1B
Q4 24
$2.5B
$3.1B
Q3 24
$2.5B
$3.2B
Q2 24
$2.5B
$3.2B
Net Profit
BIIB
BIIB
K
K
Q1 26
$319.5M
Q4 25
$-48.9M
Q3 25
$466.5M
$309.0M
Q2 25
$634.8M
$299.0M
Q1 25
$240.5M
$304.0M
Q4 24
$266.7M
$365.0M
Q3 24
$388.5M
$367.0M
Q2 24
$583.6M
$344.0M
Gross Margin
BIIB
BIIB
K
K
Q1 26
Q4 25
78.3%
Q3 25
73.4%
33.3%
Q2 25
77.1%
34.0%
Q1 25
74.1%
34.3%
Q4 24
76.2%
37.7%
Q3 24
74.1%
36.4%
Q2 24
77.8%
36.4%
Operating Margin
BIIB
BIIB
K
K
Q1 26
Q4 25
-2.5%
Q3 25
22.0%
13.9%
Q2 25
28.1%
13.7%
Q1 25
12.8%
13.9%
Q4 24
11.9%
17.0%
Q3 24
18.3%
14.1%
Q2 24
28.3%
15.4%
Net Margin
BIIB
BIIB
K
K
Q1 26
12.9%
Q4 25
-2.1%
Q3 25
18.4%
9.5%
Q2 25
24.0%
9.3%
Q1 25
9.9%
9.9%
Q4 24
10.9%
11.7%
Q3 24
15.8%
11.4%
Q2 24
23.7%
10.8%
EPS (diluted)
BIIB
BIIB
K
K
Q1 26
$2.15
Q4 25
$-0.35
Q3 25
$3.17
$0.88
Q2 25
$4.33
$0.85
Q1 25
$1.64
$0.87
Q4 24
$1.82
$1.05
Q3 24
$2.66
$1.05
Q2 24
$4.00
$1.00

Balance Sheet & Financial Strength

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

Metric
BIIB
BIIB
K
K
Cash + ST InvestmentsLiquidity on hand
$3.4B
$240.0M
Total DebtLower is stronger
$4.3B
Stockholders' EquityBook value
$18.7B
$4.2B
Total Assets
$29.5B
$15.6B
Debt / EquityLower = less leverage
1.02×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
BIIB
BIIB
K
K
Q1 26
$3.4B
Q4 25
Q3 25
$240.0M
Q2 25
$354.0M
Q1 25
$330.0M
Q4 24
$694.0M
Q3 24
$569.0M
Q2 24
$272.0M
Total Debt
BIIB
BIIB
K
K
Q1 26
Q4 25
$6.3B
Q3 25
$6.3B
$4.3B
Q2 25
$6.3B
$4.3B
Q1 25
$4.5B
$5.0B
Q4 24
$6.3B
$5.0B
Q3 24
$4.5B
$5.1B
Q2 24
$6.3B
$5.0B
Stockholders' Equity
BIIB
BIIB
K
K
Q1 26
$18.7B
Q4 25
$18.3B
Q3 25
$18.2B
$4.2B
Q2 25
$17.6B
$4.1B
Q1 25
$17.0B
$3.9B
Q4 24
$16.7B
$3.8B
Q3 24
$16.4B
$3.6B
Q2 24
$15.9B
$3.3B
Total Assets
BIIB
BIIB
K
K
Q1 26
$29.5B
Q4 25
$29.4B
Q3 25
$29.2B
$15.6B
Q2 25
$28.3B
$15.9B
Q1 25
$28.0B
$15.5B
Q4 24
$28.0B
$15.6B
Q3 24
$28.3B
$15.8B
Q2 24
$26.8B
$15.3B
Debt / Equity
BIIB
BIIB
K
K
Q1 26
Q4 25
0.34×
Q3 25
0.35×
1.02×
Q2 25
0.36×
1.05×
Q1 25
0.27×
1.28×
Q4 24
0.38×
1.32×
Q3 24
0.28×
1.40×
Q2 24
0.40×
1.51×

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
K
K
Operating Cash FlowLast quarter
$503.0M
Free Cash FlowOCF − Capex
$594.3M
$359.0M
FCF MarginFCF / Revenue
24.0%
11.0%
Capex IntensityCapex / Revenue
4.4%
Cash ConversionOCF / Net Profit
1.63×
TTM Free Cash FlowTrailing 4 quarters
$2.4B
$599.0M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
BIIB
BIIB
K
K
Q1 26
Q4 25
$511.9M
Q3 25
$1.3B
$503.0M
Q2 25
$160.9M
$169.0M
Q1 25
$259.3M
$116.0M
Q4 24
$760.9M
$467.0M
Q3 24
$935.6M
$553.0M
Q2 24
$625.8M
$376.0M
Free Cash Flow
BIIB
BIIB
K
K
Q1 26
$594.3M
Q4 25
$468.0M
Q3 25
$1.2B
$359.0M
Q2 25
$134.3M
$21.0M
Q1 25
$222.2M
$-60.0M
Q4 24
$721.6M
$279.0M
Q3 24
$900.6M
$410.0M
Q2 24
$592.3M
$234.0M
FCF Margin
BIIB
BIIB
K
K
Q1 26
24.0%
Q4 25
20.5%
Q3 25
48.4%
11.0%
Q2 25
5.1%
0.7%
Q1 25
9.1%
-1.9%
Q4 24
29.4%
8.9%
Q3 24
36.5%
12.7%
Q2 24
24.0%
7.3%
Capex Intensity
BIIB
BIIB
K
K
Q1 26
Q4 25
1.9%
Q3 25
1.8%
4.4%
Q2 25
1.0%
4.6%
Q1 25
1.5%
5.7%
Q4 24
1.6%
6.0%
Q3 24
1.4%
4.4%
Q2 24
1.4%
4.4%
Cash Conversion
BIIB
BIIB
K
K
Q1 26
Q4 25
Q3 25
2.73×
1.63×
Q2 25
0.25×
0.57×
Q1 25
1.08×
0.38×
Q4 24
2.85×
1.28×
Q3 24
2.41×
1.51×
Q2 24
1.07×
1.09×

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%

K
K

Retail Channel Snacks$2.0B62%
Retail Channel Cereal$678.0M21%
Noodlesand Other$280.0M9%
Frozen And Specialty Channels$275.0M8%

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