Stocks / BIIB vs ILMN

BIIB vs ILMN: Which Stock Is the Better Buy?

Biogen Inc. and Illumina, Inc. side by side — fundamentals from SEC filings, refreshed nightly. Sector: Healthcare.

BIIB is the larger company ($30.0B vs $24.7B). On the fundamentals, ILMN grows revenue faster (6.0% vs -6.0%); ILMN earns a higher net margin (19.6% vs 13.1%); ILMN has the stronger return on equity (31.2% vs 7.1%). Both carry 1 potential red flag in the filings. Full numbers below — the stronger figure on each row is in green.

AI verdict — BIIB vs ILMN, read from the filings

The stronger business, the cheaper stock, and the risks — synthesised from both companies’ SEC filings, every figure computed not guessed. Not investment advice.

 Biogen Inc. (BIIB)Illumina, Inc. (ILMN)
Market cap$30.0B$24.7B
Revenue (latest FY)$9.89B$4.34B
Net income (latest FY)$1.29B$850.00M
Revenue growth (5y CAGR)-6.0%6.0%
Net margin13.1%19.6%
Return on equity7.1%31.2%
P/E ratio36.129.6
Dividend yield
Profitable years (of last 10)107
Positive free cash flowYesYes

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See the full BIIB vs ILMN breakdown

Both companies across 19 years of income statement, balance sheet and cash flow — with ratios, health checks and Ask, the SEC-grounded research assistant. Free, no account needed.

Open BIIB's full financials →   Open ILMN's full financials →

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Frequently asked questions

Which is bigger, BIIB or ILMN?

Biogen Inc. is larger by market capitalization — $30.0B versus $24.7B.

Which grows faster, BIIB or ILMN?

Over the last five fiscal years, Illumina, Inc. grew revenue faster — 6.0%/yr versus -6.0%/yr, computed from SEC-filed statements.

Where does this data come from?

All figures are computed from official SEC filings (10-K), refreshed nightly. This is a data comparison, not investment advice.

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