Ionis Pharmaceuticals, Inc.

IONS Healthcare Biotechnology

Ionis Pharmaceuticals, Inc.’s revenue for fiscal 2025 (year ended December 2025) was $943.7 million, up 33.8% from fiscal 2024. In the quarter to June 2026, revenue fell 40.7%, EPS fell 188.5%, free cash flow grew 299.3% and total debt rose 116.0%, each against the same quarter a year earlier. Insiders bought in the last twelve months.

42.94 1.18 −2.67%
Market cap
$7.3B
P/E
0.0×
Fwd P/E
−20.8×
Dividend yield
—
F-score
4/9
Altman Z
2.12
Beneish M
−3.13
Dividend safety
n/a

Insider Decisions trades per month

Total buys 1.06
Total sells 92.78
Totals in millions of $.
Dec 25 Mar 26 Jun 26 Sep 26
Buy — — — — — — — — 1 — — —
Sell 6 1 22 4 8 7 3 8 4 — — —
Insider Ownership 1.51%

Capital & Financial Ratios $m

Market Cap 7,330.00
Revenue 874.09
Net Income (565.17)
Free Cash Flow (567.50)
Net Debt (703.54)
Current Ratio 7.89 (at or above 1.5: strong)
Debt/Equity 3.07 (above 2: weak)
P/E ratio 0.00
Fwd P/E (20.80) (negative: loss-making)
P/S ratio 8.13
P/B ratio 16.15 (above 6: high)
Past 5Y EPS Growth —
This Y EPS Growth (51.17%) (below 0%: weak)
Next Y EPS Growth 42.46% (at or above 15%: strong)
Next Y revenue growth (2.61%) (below 0%: weak)
Next 5Y EPS Growth 22.02% (at or above 15%: strong)

Green and red mark values outside typical ranges. How we judge →

Valuation vs history

P/S against its own 10 years 33.58%
10-year low 10-year high
P/B against its own 10 years 61.30%
10-year low 10-year high
EV/Sales against its own 10 years 44.93%
10-year low 10-year high

Dividends

Payout Ratio —
Annual Dividend Rate —
Annual Dividend Yield —
total individual payouts
2025 Powerpack
2024 Powerpack
2023 Powerpack
2022 Powerpack
2021 Powerpack
2020 Powerpack
2019 Powerpack
2017 Powerpack
predictions special payouts not included in total or ratios

Assets vs Liabilities $m

2023 2024 2025 Q'26
Cash 2,331 2,298 2,677 2,055
Receivables 98 92 66 59
Inventory 7 13 10 51
Other 205 218 237 327
2,642 2,620 2,991 2,491
2023 2024 2025 Q'26
Payables 26 43 28 48
ST’ Debt 44 — 432 —
Other 9 9 23 25
448 309 782 316

Compound Annual Growth %

10y 5y 3y
Sales 12.77% 5.29% 17.12%
Cash Flow 0.00% 0.00% 0.00%
Earnings 0.00% 0.00% 0.00%
Book Value 9.31% (8.03%) (5.13%)

Revenue $m

Mar Jun Sep Dec Year
’26 246 268 — — —
’25 132 452 157 203 944
’24 119 225 134 227 705
’23 131 188 144 325 788
’22 142 134 160 152 587
’21 112 126 133 440 810
’20 133 146 160 290 729
Fiscal quarters ending in the months shown.

Operating Cash Flow $m

Mar Jun Sep Dec Year
’26 (793) 566 — — —
’25 (151) 151 (131) (138) (269)
’24 (150) (120) (115) (116) (501)
’23 (134) (97) (109) 33 (308)
’22 (32) (18) (24) (200) (274)
’21 (55) (63) (56) 204 31
’20 (8) (44) (10) 98 36
Fiscal quarters ending in the months shown.

Free Cash Flow $m

Mar Jun Sep Dec Year
’26 (816) 547 — — —
’25 (164) 137 (138) (160) (326)
’24 (156) (140) (111) (144) (551)
’23 (146) (110) (112) 33 (336)
’22 (34) (23) (31) 49 (40)
’21 (58) (70) (60) 200 13
’20 (18) (55) (23) 91 (5)
Fiscal quarters ending in the months shown.

EPS $

Mar Jun Sep Dec Year
’26 (0.56) (0.69) — — —
’25 (0.93) 0.70 (0.80) (1.41) (2.38)
’24 (0.98) (0.45) (0.95) (0.66) (3.04)
’23 (0.87) (0.60) (1.03) (0.06) (2.56)
’22 (0.46) (0.74) (0.33) (0.37) (1.90)
’21 (0.64) (0.57) (0.58) 1.41 (0.20)
’20 (0.35) (0.23) (0.22) (2.44) (3.23)
Fiscal quarters ending in the months shown.

Target Price Range

Analyst price targets

Recommendation Rating

1.5
1Buy 2 3Hold 4 5Sell

Ten years at a glance Fiscal years to December

Group Line 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 Trend 2026e 2027e 2028e
Price, $
Price, $ Low 19.59 37.26 39.07 52.45 39.32 25.04 28.25 32.69 33.33 23.95

Analyst estimates 2026–2028

Powerpack
High 62.68 65.51 59.81 86.58 64.34 64.37 48.82 52.27 54.44 83.61
People
People Employees 435 547 737 817 757 660 796 927 1,069 1,402
Revenue/emp, $m 0.86 0.94 0.81 1.37 0.96 1.23 0.74 0.85 0.66 0.67
Income, $m
Income, $m Revenue 373 514 600 1,123 729 810 587 788 705 944
Gross margin, % 100.00 100.00 99.70 99.61 98.36 98.66 97.60 98.84 98.41 98.31
EBT (57) (17) (76) 339 (135) (29) (258) (334) (460) (380)
EBT margin, % (15.42) (3.26) (12.70) 30.18 (18.45) (3.60) (43.92) (42.40) (65.25) (40.22)
Net income (60) (11) 215 287 (480) (29) (270) (366) (454) (381)
Depreciation 48 51 47 11 32 42 35 0 (9) 6
Per share, $
Per share, $ Revenue 3.08 4.15 4.53 8.02 5.22 5.75 4.14 5.50 4.72 5.90
Earnings (0.50) (0.09) 2.09 2.12 (3.23) (0.20) (1.90) (2.56) (3.04) (2.38)
Cash flow (0.93) 1.40 4.56 2.47 0.26 0.22 (1.93) (2.15) (3.35) (1.68)
Capex (0.10) (0.31) (0.13) (0.26) (0.29) (0.13) 1.65 (0.20) (0.34) (0.36)
Free cash flow (1.02) 1.10 4.42 2.21 (0.04) 0.09 (0.28) (2.34) (3.69) (2.04)
Book value 0.82 2.95 8.97 12.03 5.32 5.47 4.04 2.70 3.94 3.06
Shares, m 121 124 132 140 140 141 142 143 150 160
Valuation, ×
Valuation, × P/E 0.00 723.20 27.17 28.50 0.00 0.00 0.00 0.00 0.00 0.00
P/S 15.36 11.88 11.93 7.53 10.82 5.29 9.08 9.61 7.41 13.41
P/B 57.50 16.72 6.03 5.02 10.62 5.56 9.30 19.58 8.88 25.88
EV/Sales 14.96 11.07 9.53 6.01 9.52 4.21 7.72 8.27 5.98 12.46
EV/FCF (45.11) 41.77 9.77 21.81 (1,346.18) 292.06 (108.29) (19.41) (7.65) (36.11)
Cash, $m
Cash, $m Operating cash flow (112) 174 603 346 36 31 (274) (308) (501) (269)
Capex (12) (38) (18) (36) (41) (18) 234 (28) (50) (57)
Free cash flow (124) 136 585 309 (5) 13 (40) (336) (551) (326)
Balance, $m
Balance, $m Working capital 664 925 1,928 2,448 1,532 2,104 1,891 2,194 2,311 2,209
Total debt 517 607 647 788 940 1,232 1,191 1,274 1,245 1,779
Net debt (148) (415) (1,437) (1,712) (953) (883) (796) (1,057) (1,052) (898)
Shareholders’ equity 100 365 1,187 1,685 743 772 573 387 588 489
Returns, %
Returns, % ROA (6.49) 0.03 13.72 9.43 (15.80) (1.14) (10.48) (13.26) (15.15) (11.69)
ROIC 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
ROE (40.22) 0.15 35.27 19.37 (36.60) (3.78) (40.12) (76.34) (93.10) (70.80)
Negative figures in brackets.

All 10 years →

Fiscal years to Dec 2025 · latest quarter Jun 2026

Charts ten years each

Ionis Pharmaceuticals, Inc. vs peers in Biotechnology (Q) = latest quarter vs a year earlier

Company Market cap P/E Fwd P/E Revenue growth (Q) EPS growth (Q) FCF growth (Q) Gross margin (Q) EBIT margin (Q) Compare
TGTX TG Therapeutics, Inc. $8.6B 17.8× 29.4× +70.27% (above 0%: growing) −73.68% (below 0%: shrinking) +427.05% (above 0%: growing) 82.86% 9.02% Compare
AXSM Axsome Therapeutics, Inc. $8.5B — (loss-making) — (loss-making) +45.54% (above 0%: growing) n/m −2.98% (below 0%: shrinking) 93.79% (22.73%) Compare
ARWR Arrowhead Pharmaceuticals, Inc. $8.3B — (loss-making) — (loss-making) +171.02% (above 0%: growing) n/m −15.43% (below 0%: shrinking) 100.00% (226.03%) Compare
ABVX Abivax SA Sponsored ADR $8.1B — (loss-making) — — n/m −48.28% (below 0%: shrinking) 0.00% 0.00% Compare
SYRE Spyre Therapeutics, Inc. $7.4B — (loss-making) — (loss-making) −100.00% (below 0%: shrinking) n/m −50.07% (below 0%: shrinking) 0.00% 0.00% Compare
IONS Ionis Pharmaceuticals, Inc. $7.3B — (loss-making) — (loss-making) −40.73% (below 0%: shrinking) n/m +299.29% (above 0%: growing) 98.98% (38.18%)
PRAX Praxis Precision Medicines, Inc. $6.9B — (loss-making) — (loss-making) +1,349.13% (above 0%: growing) n/m −43.54% (below 0%: shrinking) 100.00% 0.00% Compare
IOVA Iovance Biotherapeutics, Inc. $6.7B — (loss-making) — (loss-making) +65.65% (above 0%: growing) n/m +11.52% (above 0%: growing) 56.10% (52.26%) Compare
BLTE Belite Bio, Inc. Sponsored ADR $6.2B — (loss-making) — — n/m +64.67% (above 0%: growing) — 0.00% Compare
Median of peers $7.7B — — +67.96% — −9.20% 82.86% 0.00%

All 614 Biotechnology stocks →

Ionis Pharmaceuticals, Inc. (IONS) key facts

  • Strength: Ionis Pharmaceuticals, Inc.’s revenue for fiscal 2025 (year ended December 2025) was $943.7 million, up 33.8% from fiscal 2024.
  • Ionis Pharmaceuticals, Inc. (IONS) is a Biotechnology company in the Healthcare sector, listed on Nasdaq.
  • As of October 16, 2026, IONS traded at $42.94, a market capitalization of $7.3 billion.
  • Return on equity was −70.8% and debt-to-equity 3.07.
  • Its Piotroski F-score is 4 out of 9 and its Altman Z-score is 2.12 (grey zone) for fiscal 2025.

Source: company filings (standardised) and stockrow calculations.

Ionis Pharmaceuticals, Inc. (IONS) Latest News

7 Aug

Impact 4 · transcript
stockrow.com/IONS · Data as of Jun 30, 2026 · For information only; not investment advice. · © 2026 stockrow.com