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Ionis Pharmaceuticals vs Kiniksa Pharmaceuticals International

Ionis Pharmaceuticals is the larger business, with $944m of revenue in fiscal 2025 against $678m for Kiniksa Pharmaceuticals International (1.4 times as much). Kiniksa Pharmaceuticals International grew faster (60.1% against 33.8%). Kiniksa Pharmaceuticals International kept more of each dollar of sales as profit: a net margin of 8.7% against -40.4%. Kiniksa Pharmaceuticals International carries less debt relative to equity (0.0% against 370.6%).

Latest fiscal yearIonis PharmaceuticalsIONS, 2025Kiniksa Pharmaceuticals InternationalKNSA, 2025
Revenue $944m $678m
Revenue growth 33.8% 60.1%
Net income −$381m $59.0m
Operating margin -40.4% 11.4%
Net margin -40.4% 8.7%
Return on equity -70.8% 11.7%
Free cash flow −$320m $136m
Cash $372m $166m
Total debt $1.81bn $0
Debt to equity 370.6% 0.0%
Dividend per share — —
Dividend yield — —
Share buybacks — —
Employees 1,402 366
Market value $6.75bn $7.91bn
Price vs our value range — Above our value range
Moat score 35 (Weak) 16 (Weak)
Insider trades, 12 months 2 buys, 116 sales 0 buys, 37 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.