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Ionis Pharmaceuticals, Inc.

IONSFDA catalysts, PDUFA dates & pipeline intelligence
$44.39
▲ +0.1 · +0.22%

Financials

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Total Assets
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52W LOW $42.0852W HIGH $86.74
Volume
1.83 M
Value Traded
136.80 M
Short % Float
12.68%
Days to Cover
7.7
+3.4%Week
-0.58%1 Month
-14.26%3 Month
-41.03%6 Month
+105.77%5 Year
+655.6%All Time

Cash Data

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Key Stats

Market Cap
7.38 B
EPS (TTM)
-3.40
P/E Ratio
-
Ent. Value
5.32 B
Total Shares
166.18 M
Float Shares
162.92 M
Insiders
1.97%
Institutions
107.66%

Upcoming Catalysts

FDA decisions, readouts and PDUFA dates · scored by probability of approval

Catalyst Drug / Treatment Stage Prob. of Approval Description Drug Type Therapeutic Area Source
Phase 3 data readout
Obudanersen
Angelman syndrome
Phase 3RNA-Based TherapiesNervous System
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Every FDA decision, readout and PDUFA date, with drug type, therapeutic area and a PoA score you can trade on.
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PoA blends historical approval base rates, trial design score and FDA review track record.

IONS Catalyst Timeline

Dated clinical, regulatory and corporate events for Ionis Pharmaceuticals, Inc.

Catalyst Timeline

Dated clinical, regulatory & corporate events for Ionis Pharmaceuticals, Inc.

458Total events
19Upcoming
205Tier-1 (high impact)
2018 to 2027Coverage

Upcoming catalysts 2

T2EU MAA Submission
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zilganersenApproved
T2PMDA Milestone
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zilganersenApproved

Event history 50

▲Primary Endpoint MetSefaxersenClinical Data
Sefaxersen met primary endpoint with 43.1% proteinuria reduction at 37 weeks in Phase 3 IMAgINATION
IgA nephropathy (IgAN)source ↗
▲Secondary Endpoint DataSefaxersenClinical Data
Greater proportion of patients achieved hematuria resolution at Week 37 with sefaxersen vs placebo
IgA nephropathy (IgAN)source ↗
▲Late-BreakerSefaxersenPresentation
Late-breaking oral presentation of Phase 3 IMAgINATION data at ASN Kidney Week 2026
IgA nephropathy (IgAN)source ↗
▲Safety Data UpdateSefaxersenClinical Data
Sefaxersen well tolerated with no new safety signals in Phase 3 IMAgINATION
IgA nephropathy (IgAN)source ↗
▲FDA ApprovalBepirovirsenApprovedFDA Decision
FDA approves Hibsago (bepirovirsen) for chronic hepatitis B
chronic hepatitis B (CHB)source ↗
▲CHMP Positive OpinionOlezarsenApprovedEx-US Regulatory
CHMP positive opinion recommending TRYNGOLZA indication extension for sHTG in EU
severe hypertriglyceridemia (sHTG)source ↗
▲Primary Endpoint MetSefaxersenClinical Data
IMAgINATION met primary endpoint with statistically significant proteinuria reduction vs placebo at 37 weeks
IgA nephropathy (IgAN)source ↗
▲Interim AnalysisSefaxersenTrial
Positive prespecified interim results from Phase 3 IMAgINATION study in IgAN
IgA nephropathy (IgAN)source ↗
▲Safety Data UpdateSefaxersenClinical Data
Safety and tolerability consistent with previously reported data; no new safety signals
IgA nephropathy (IgAN)source ↗
▲Topline ReadoutulefnersenClinical Data
Positive topline results from Phase 3 FUSION trial of ulefnersen in FUS-ALS
FUS-ALSsource ↗
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Past FDA Catalysts and PDUFA Decisions

How IONS actually traded into and out of each decision

Date Drug Catalyst Stage Reaction Event Move % Best Trade %
2026-10-21bepirovirsen PDUFA Date ApprovedPDUFA
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Reaction: 30 trading days around the event · Event Move: close to close on decision day · Best Trade: peak run-up from entry 10 days before the decision

Drug Pipeline Intelligence

Pipeline Score
Pipeline Value
Commercial Value
Valuation Signal
20
Drugs Scored
rNPV / MCap
Top Drug
Top 4%
Small Cap
(rank 27 of 657)
Percentile Rank
Commercial products (revenue basis: trailing 4 quarters of total revenue (10-Q), to Jun 2026; product lines from the latest annual filing)
ProductRevenuePrior periodChange
TRYNGOLZA
DAWNZERA
Showing 38 of 88 assets
DrugIndicationPhasePTRSrNPVStatusEnrollVelocityDesignEst. CompletionML SignalLast Change
ION775 Small moleculeNCT07604974HypertriglyceridemiaPhase 2 RECRUITING 72Mar 1, 2028
ION717 Small moleculeNCT06153966Prion DiseasePhase 1 ACTIVE NOT_RECRUITING 85Aug 1, 2030
ION337 Small moleculeNCT07531745Dravet SyndromePhase 1 RECRUITING 32Dec 1, 2030
obudanersen RNA therapyNCT06914609Angelman SyndromePhase 3 ACTIVE NOT_RECRUITING 186Apr 1, 2030
ION582 Small moleculeNCT05127226Angelman SyndromePhase 1 ACTIVE NOT_RECRUITING 71Mar 1, 2029
ION356 Small moleculeNCT06150716Pelizaeus-Merzbacher DiseasePhase 1 RECRUITING 24Jun 1, 2028
ION440 Small moleculeNCT06430385Methyl CpG Binding Protein 2 (MECP2) Duplication SyndromePhase 1 RECRUITING 48Apr 1, 2030
ION464 Small moleculeNCT04165486Multiple System AtrophyPhase 1 RECRUITING 40Sep 1, 2027
zilganersen RNA therapyMarketedNCT04849741Alexander DiseasePhase 3 ACTIVE NOT_RECRUITING 54Jul 1, 2034
Olezarsen RNA therapyMarketedNCT05681351Severe HypertriglyceridemiaPhase 3 ACTIVE NOT_RECRUITING 1,948Mar 1, 2027
Donidalorsen RNA therapyMarketedNCT05392114Hereditary AngioedemaPhase 3 ACTIVE NOT_RECRUITING 308Mar 1, 2027
Olezarsen RNA therapyMarketedNCT05130450Familial Chylomicronemia SyndromePhase 3 ACTIVE NOT_RECRUITING 162Feb 1, 2028
Eplontersen RNA therapyMarketedNCT05071300Hereditary Transthyretin-Mediated Amyloid PolyneuropathyPhase 3 ACTIVE NOT_RECRUITING 151Aug 1, 2029
ION363 Small moleculeNCT04768972Amyotrophic Lateral SclerosisPhase 3 ACTIVE NOT_RECRUITING 89Mar 1, 2028
IONIS-FB-LRx Small moleculeCompletedNCT04014335Primary IgA NephropathyPhase 2 COMPLETED 23Apr 11, 2024
IONIS-FB-LRx Small moleculeCompletedNCT03815825Macular DegenerationPhase 2 COMPLETED 332Jun 12, 2024
ISIS 681257 Small moleculeCompletedNCT03426033Elevated Lipoprotein(a)Phase 2 COMPLETED 322Feb 25, 2018
Pelacarsen RNA therapyCompletedNCT05337878UndisclosedPhase 1 COMPLETED 29Dec 18, 2019
ISIS 681257 Small moleculeCompletedNCT03506854Renal ImpairmentPhase 1 COMPLETED 16Oct 11, 2018
IONIS-APO-LRx Small moleculeCompletedNCT02414594Elevated Lipoprotein(a)Phase 1 COMPLETED 60Feb 1, 2016
ION224 Small moleculeCompletedNCT04932512Steatohepatitis, NonalcoholicPhase 2 COMPLETED 160Feb 28, 2024
Ionis AGT-LRx Small moleculeCompletedNCT04714320HypertensionPhase 2 COMPLETED 160Oct 3, 2022
Ionis AGT-LRx Small moleculeCompletedNCT04836182Chronic Heart Failure With Reduced Ejection FractionPhase 2 COMPLETED 72Jan 11, 2023
ION904 Small moleculeCompletedNCT05314439HypertensionPhase 2 COMPLETED 48Feb 15, 2023
sapablursen RNA therapyCompletedNCT05143957Phlebotomy Dependent Polycythemia VeraPhase 2 COMPLETED 50Jun 2, 2026
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PTRS, rNPV, enrollment velocity, trial design quality and ML risk signals for every asset above.
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Clinical Trial Results

Readouts, endpoints and source filings for every IONS program

Drug Name Indication Phase Date Trial Results SummaryTitleSource
sefaxersen IgA nephropathyPhase 32026-10-2343.1% reduction in proteinuria (95% confidence interval [CI]: 32.5 - 52.0, P<0.0001)Read MoreIonis partner Roche announces new Phase 3 data showing sefaxersen significantly reduced proteinuria in people with IgA nephropathy (IgAN)Read More
Scroll for more · summaries link to the source press release
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Inside Trades

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Monthly insider buys and sells against the stock price, with the insider sentiment reading.
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InsiderSideSharesPriceValueDate
Swayze EricOfficer (EVP Research)Sell -53 390 held$43.54 10/16/2026
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Hedge Fund 13F Activity

Fund % of Portfolio Current MV Shares Owned Activity
Deep Track Capital, LP 2.5 % (4.2 %) 174.44 M 2.20 M 12.82% ( 250.00 K)
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Shares held by hedge funds each quarter, and who bought or sold.

IONS Institutional Ownership Trends

IONS Short Interest

Shares sold short, counted twice a month.

12.68%
Short % of Float
of tradable shares sold short
20.7M
Shares Sold Short
-8.2% vs prior count
7.7 High
Days to Cover
trading days of normal volume to buy every short share back
2.7M
Avg Daily Volume
the average used for days to cover
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Two years of days to cover and shares sold short, with every count and its change.
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Options Data

Option Volume

Open Interest
Call OI
Put OI
Put-Call Ratio
OI 30-day avg
Today vs avg
Option Volume
Call Vol
Put Vol
Put-Call Ratio
Vol 30-day avg
Today vs avg

Option Chain Statistics

ExpiryCall VolPut VolVol P/CCall OIPut OIOI P/CIV CallIV Call OI-WtdIV Call Vol-WtdIV PutIV Put OI-WtdIV Put Vol-Wtd
2026-11-20
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Per-expiry call and put volume, open interest, put-call ratios and implied volatility.
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Real-Time Option Chain

CallsStrikePuts
LastVolOILastVolOI
No data available
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Calls vs Puts by Expiry

CallsPutsLog scale
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Competitive positioning

How IONS ranks across every disease it competes in

Competitive Position is a premium feature
See how IONS ranks against every competitor across each disease it develops in: phase, best drug, trials and likelihood of approval.
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IONS News

IONS
Oct 23, 2026
IONSPhases

Ionis partner Roche announces new Phase 3 data showing sefaxersen significantly reduced proteinuria in people with IgA nephropathy (IgAN)

Roche announced Phase 3 data showing that sefaxersen significantly reduced proteinuria by 43.1% in patients with IgA nephropathy compared to placebo. This investigational treatment aims to slow disease progression and is designed for monthly self-administration. The results indicate a strong potential for sefaxersen to improve outcomes for patients at risk of kidney failure.

Read more →
IONS
Oct 22, 2026
IONSGeneral

Ionis ranked #1 on Science’s Top Employers list

Ionis Pharmaceuticals has been named the top employer by Science in its annual survey, rising from second place last year. The recognition highlights Ionis's commitment to innovation and a strong corporate culture. CEO Brett P. Monia emphasized the company's patient-centric purpose and the importance of fostering a supportive work environment.

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IONS
Oct 21, 2026
IONSFDA Updates

Ionis partner GSK announces Hibsago (bepirovirsen) approved in the U.S. for the treatment of chronic hepatitis B (CHB)

GSK announced FDA approval for Hibsago (bepirovirsen) to treat chronic hepatitis B. This first-in-class RNA-targeted medicine demonstrated a 19% functional cure rate in Phase 3 trials, significantly outperforming existing therapies. The treatment offers the possibility of at-home administration after the initial dose, addressing a critical need for effective hepatitis B management.

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IONS
Oct 16, 2026
IONSFDA Updates

TRYNGOLZA® (olezarsen) recommended for approval in the EU by CHMP for severe hypertriglyceridemia (sHTG)

Ionis Pharmaceuticals announced that the CHMP has recommended approval for TRYNGOLZA (olezarsen) for treating severe hypertriglyceridemia (sHTG) in the EU. This recommendation is based on positive results from Phase 3 studies showing significant reductions in triglyceride levels. If approved by the European Commission, it would be the first RNA-targeted therapy for sHTG in the EU.

Read more →
IONS
Sep 23, 2026
IONSPhases

Ionis announces positive interim data from partner Roche’s Phase 3 IMAgINATION study in IgA nephropathy (IgAN)

Ionis Pharmaceuticals and Roche reported positive interim results from the Phase 3 IMAgINATION study of sefaxersen in adults with IgA nephropathy. The investigational treatment achieved significant improvements in proteinuria reduction compared to placebo at 37 weeks. This marks a successful milestone for the ongoing clinical trial.

Read more →
IONS
Sep 22, 2026
IONSPhases

Ionis announces positive topline results from Phase 3 FUSION study of ulefnersen marking significant milestone in advancing first potential disease modifying treatment for FUS-ALS

Ionis Pharmaceuticals announced positive topline results from the Phase 3 FUSION trial of ulefnersen, an investigational treatment for FUS-ALS. The study met its primary endpoint, showing significant improvements in functional impairment and survival. Ulefnersen is the first treatment targeting the genetic cause of FUS-ALS, with plans for expedited regulatory submissions to the FDA.

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IONS
Sep 4, 2026
IONSPhases

Ionis partner Novartis announces Lp(a)HORIZON Phase 3 topline results for pelacarsen in patients with elevated Lp(a) and established cardiovascular disease (CVD)

Ionis Pharmaceuticals' partner Novartis reported that the pelacarsen Phase 3 Lp(a)HORIZON study failed to achieve its primary goal of reducing cardiovascular event risks. The study aimed to evaluate the drug's effectiveness in patients with elevated Lp(a) and established cardiovascular disease but did not show significant benefits compared to placebo. This outcome is consistent with previous research findings.

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IONS
Sep 3, 2026
IONSFDA Updates

ZANVASTRO™ (zilganersen) approved by the FDA as the first and only disease modifying treatment for Alexander disease (AxD) in pediatric and adult patients

Ionis Pharmaceuticals has received FDA approval for ZANVASTRO (zilganersen), the first disease-modifying treatment for Alexander disease (AxD) in both pediatric and adult patients. This approval represents a significant advancement in the management of this ultra-rare and progressive neurological disorder, which has previously lacked effective treatment options.

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IONS
Sep 3, 2026
IONSConferences/Events
▼ -5.2%on this newsshared move

Ionis to present at upcoming investor conferences

Ionis Pharmaceuticals has announced its participation in two upcoming investor conferences. The management will engage in fireside chats at the 21st Annual Wells Fargo Healthcare Conference and the Morgan Stanley 24th Annual Global Healthcare Conference. Live webcasts of these presentations will be available on the company's website.

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IONS
Aug 24, 2026
IONSFDA Updates

Ionis partner GSK announces Hibsago (bepirovirsen) approved in Japan as first and only functional cure for chronic hepatitis B

GSK has received approval from Japan's MHLW for Hibsago (bepirovirsen) as the first functional cure for chronic hepatitis B. This treatment is aimed at adults who have undergone prior nucleos(t)ide analogue therapy. The approval is based on phase III trial results showing a 19% functional cure rate, significantly higher than the current standard of care. GSK plans to pursue regulatory submissions in other regions, including the US.

Read more →
IONS
Aug 20, 2026
IONSConferences/Events

Ionis to present new data strengthening leadership in the management of severe hypertriglyceridemia (sHTG) at the European Society of Cardiology Congress 2026

Ionis Pharmaceuticals announced that it will present new data on the management of severe hypertriglyceridemia (sHTG) at the European Society of Cardiology Congress 2026. The presentation will include one-year data from the long-term extension study of TRYNGOLZA® (olezarsen), which is the first approved treatment for sHTG in the U.S. The congress is scheduled for August 28-31 in Munich.

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IONS
Jul 29, 2026
IONSGeneral

Ionis announces Dr. Frank Bennett, chief scientific officer, to retire

Ionis Pharmaceuticals announced the retirement of Dr. Frank Bennett, its chief scientific officer, effective February 2027. As a founding scientist, Bennett has played a crucial role in developing RNA-targeted therapies. His contributions have been pivotal in advancing antisense medicine, particularly in neurology, according to CEO Brett P. Monia.

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IONS
Jul 29, 2026
IONSGeneral

Ionis reports second quarter 2026 financial results and highlights progress on key programs

Ionis Pharmaceuticals reported its financial results for Q2 2026, highlighting the approval of TRYNGOLZA, the first treatment aimed at reducing triglycerides and preventing acute pancreatitis in patients with severe hypertriglyceridemia. The company expressed optimism about the early momentum of the product's launch and its potential for revenue growth.

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IONS
Jul 15, 2026
IONSConferences/Events

Ionis to hold second quarter 2026 financial results webcast

Ionis Pharmaceuticals, Inc. will host a live webcast on July 29, 2026, at 8:30 a.m. ET to discuss its second quarter financial results. The event will also cover progress on key programs. A replay will be available for a limited time after the live presentation.

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IONS
Jul 14, 2026
IONSPhases

Ionis Partner Biogen Presents Phase 2 CELIA Data at AAIC Demonstrating Meaningful Clinical Outcomes and Robust Tau Reduction with Diranersen in Early Alzheimer’s Disease

Ionis Pharmaceuticals and Biogen presented new data from the Phase 2 CELIA study at the AAIC 2026. The study evaluated diranersen, an investigational therapy targeting tau in early Alzheimer's disease. The results indicate significant clinical benefits and a notable reduction in tau levels, building on earlier findings.

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IONS
Jul 13, 2026
IONSPhases

Ionis doses first participant in Phase 1-2 ASCEND study of ION337 in Dravet syndrome

Ionis Pharmaceuticals has initiated the Phase 1-2 ASCEND study by dosing the first participant with ION337. This investigational RNA-targeted medicine aims to treat Dravet syndrome, a severe neurological disorder that begins in infancy. The study represents a significant step forward in addressing the needs of patients affected by this condition.

Read more →
IONS
Jul 9, 2026
IONSPhases
▼ -23.9%on this news· ran to -35% by day 3shared move

Update on CARDIO-TTRansform Phase 3 trial of eplontersen in adults with transthyretin-mediated amyloid cardiomyopathy

Ionis Pharmaceuticals and AstraZeneca reported that the CARDIO-TTRansform Phase 3 trial for eplontersen in patients with transthyretin-mediated amyloid cardiomyopathy failed to meet its primary efficacy endpoint. The trial assessed cardiovascular mortality and recurrent clinical events but showed no significant difference compared to placebo. This outcome raises concerns about the drug's future prospects.

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IONS
Jul 6, 2026
IONSPhases

Ionis completes enrollment in pivotal cohort of the Phase 3 REVEAL study evaluating obudanersen in Angelman syndrome

Ionis Pharmaceuticals has completed enrollment in the pivotal cohort of the Phase 3 REVEAL study. This study is evaluating the efficacy of obudanersen in patients with Angelman syndrome. The completion of enrollment marks a significant step in the clinical trial process for this rare genetic disorder.

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IONS
Jun 25, 2026
IONSGeneral

Ionis announces license agreement with Recordati for zilganersen in Alexander disease (AxD) in all countries outside the U.S.

Ionis Pharmaceuticals has entered into a licensing agreement with Recordati for the development of zilganersen, a treatment for Alexander disease (AxD). This agreement grants Recordati rights to market the drug in all countries outside the United States. This collaboration aims to advance the treatment options available for patients suffering from AxD.

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IONS
Jun 24, 2026
IONSFDA Updates

TRYNGOLZA® (olezarsen) approved by the FDA as the first and only treatment to reduce triglycerides and the risk of acute pancreatitis in patients with severe hypertriglyceridemia (sHTG)

The FDA has approved TRYNGOLZA® (olezarsen) as the first treatment specifically designed to reduce triglycerides and the risk of acute pancreatitis in patients suffering from severe hypertriglyceridemia (sHTG). This approval represents a significant advancement in managing this serious condition, offering hope for improved patient outcomes.

Read more →

About Ionis Pharmaceuticals, Inc.

Carlsbad, CA 1,402 employees ionis.com
Headquarters2855 GAZELLE COURT, CARLSBAD, CA, 92010
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