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Korro Bio vs Korsana Biosciences

Korro Bio is the larger business, with $6.4m of revenue in fiscal 2025 against $2.1m for Korsana Biosciences (3.1 times as much). Korro Bio grew faster (181.5% against 3.7%). Korsana Biosciences kept more of each dollar of sales as profit: a net margin of -170.1% against -1834.5%.

Latest fiscal yearKorro BioKRRO, 2025Korsana BiosciencesKRSA, 2025
Revenue $6.4m $2.1m
Revenue growth 181.5% 3.7%
Net income −$117m −$3.5m
Operating margin — -239.8%
Net margin -1834.5% -170.1%
Return on equity -110.7% -39.3%
Free cash flow −$79.1m −$3.3m
Cash $21.8m $3.2m
Total debt $0 $0
Debt to equity — 0.0%
Dividend per share — —
Dividend yield — —
Share buybacks — —
Employees 58 —
Market value $233m $135m
Price vs our value range — —
Moat score — —
Insider trades, 12 months 16 buys, 33 sales 0 buys, 0 sales

Each figure is from the company's latest annual report and links to the page it comes from. Fiscal years can end on different dates. Market value and the value verdict use the delayed price shown on the stock pages. Not a recommendation.

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Figures from each company's latest annual report filed with the SEC (10-K or 20-F), as reported, with the fiscal year shown. Not investment advice. How we read filings: methodology.