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MARKETS / NASDAQ / IONS
NASDAQ · PHARMACEUTICAL PREPARATIONS · LARGE CAP

Ionis Pharmaceuticals Inc. IONS

18 fiscal years on record · USD · FY2025 reported · SEC filings only
$943.7M
▲ 33.8% YoY
$-381.4M
$-320.0M
In brief

What this company does

Ionis Pharmaceuticals, Inc. markets seven medicines to treat serious diseases: TRYNGOLZA (olezarsen), DAWNZERA (donidalorsen), WAINUA (eplontersen), SPINRAZA (nusinersen), QALSODY (tofersen), TEGSEDI (inotersen) and WAYLIVRA (volanesorsen). It manufactures most of the active pharmaceutical ingredients it uses for its research and development activities itself. It and AstraZeneca co-develop WAINUA globally and co-commercialize it in the U.S., with AstraZeneca holding exclusive rights to commercialize WAINUA outside of the U.S. Its manufacturing facility occupies a 26,800 square foot building in Carlsbad, California. As of February 19, 2026, it employed 1,402 people, the vast majority of whom reside in the U.S.

Written from the business description in Ionis Pharmaceuticals, Inc.'s annual report to the U.S. Securities and Exchange Commission, filed 26 February 2026. Every sentence was checked against that document before publication.

Growth
USD 943.7M
Revenue, FY2025 · full 18-year series below
Revenue $B Net income $B
FY2025 · Revenue 0.9 · Net income -0.4
0.4B0.8B-0.2B-0.4B2008201120142017202020232025
Compound annual growth
+17.1%
+5.3%
+12.8%
+15.5%
3 yrs
5 yrs
10 yrs
15 yrs

Revenue compounded at +5.3% a year over five years.

Compound annual rates per period — left blank where that exact year isn't on file, the series crosses a loss, or (per-share rows) a split falls inside the window.

Profitability
−40 cents
lost on every revenue dollar
Operating margin Net margin
FY2025 · Operating -40.4% · Net -40.4%
50%100%-50%2008201120142017202020232025
ROE
FY2025 · ROE -70.8%
20%40%-50%2008201120142017202020232025

Each USD of equity lost 71 cents this year.

Cash & shareholders
returned in FY2025 · dividends + net buybacks
Free cash flow $M
FY2025 · FCF -320.0
200M400M-200M-400M2008201120142017202020232025
Net buybacks $M Dividends $M
FY2022 · Dividends — · Net buybacks 0.0
40M80M-200M-400M201720182019202020212022

Total assetsUSD 3.5B
EquityUSD 489.1M
CashUSD 372.3M
Gross debtUSD 1.8B
Net debtUSD 1.4B
Current ratio3.83×

Net debt stands at 284% of equity.

The 18-year record
18 fiscal years
Every figure from documents filed with the SEC · USD
row low → row highnegative
Metric 202520242023202220212020201920182017201620152014201320122011201020092008
Revenue $B0.90.70.80.60.80.71.10.60.50.40.30.20.10.10.10.10.10.1
Operating income $B−0.4−0.5−0.4−0.4−0.0−0.20.4−0.10.0−0.0−0.1−0.0−0.1−0.1−0.1−0.0−0.0−0.0
EBITDA $B−0.4−0.5−0.3−0.4−0.0−0.20.4−0.10.0−0.0−0.1−0.0−0.0−0.1−0.1−0.0−0.0−0.0
Income tax $B0.0−0.00.00.0−0.00.30.1−0.3−0.00.00.0−0.0−0.0−0.00.00.00.0·
Net income $B−0.4−0.5−0.4−0.3−0.0−0.40.30.30.0−0.1−0.1−0.0−0.1−0.1−0.1−0.10.2−0.0
Free cash flow $B−0.3−0.5−0.3−0.30.00.00.30.60.1−0.10.0−0.00.10.0−0.1−0.1−0.10.2
EPS, diluted $−2.38−3.04−2.56−1.90−0.20−3.181.902.070.15−0.50−0.74−0.33−0.55−0.65−0.85−0.621.58−0.19
Dividend / sh $··················
Payout %··················
ROE %−70.8−93.1−76.3−40.1−3.8−40.122.141.20.2−40.2−38.5−12.3−21.6··−22.853.2·
Shares out B0.160.160.140.140.140.140.140.140.120.120.120.120.120.100.100.100.10·

Slide the table for earlier years · "·" marks a figure not available in our data for that year.

Provenance
Company facts, as filed
How we verify · 0 failures in 70 reconciliationsAUDITED

Reconciled in 18 of 19 fiscal years. 15 checks could not be computed.

EPS recomputationBalance-sheet identityGross profitBalance-sheet liquiditymoeda_consistente0 failures
ActivityPharmaceutical Preparations
Listed onNASDAQ
Incorporated inCalifornia
Fiscal year endsDecember 31
Data on record since2008

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