IONS

IONIS PHARMACEUTICALS INC

Nasdaq · Pharmaceutical Preparations · Inc. CA · CIK 0000874015
$73.54 -1.26% $12.2B
Insider Selling Cluster (6 insiders)High Impact Filing (7/10)
Vol
Market Cap$12.2B
Cap SizeLarge Cap
Analyst ConsensusStrong Buy (82%)
Inst. Holders10 funds
Inst. Value$3.9B
Inst. Activity2 buys / 1 sells
Insider Activity0B / 19S
Insider Net $-$29.5M
SEC Reports6
Exchange Nasdaq·Sector Pharmaceutical Preparations·Inc. CA·CIK 0000874015·Prev Close $74.48

Recent Activity

Oct 26, 2026 fda_pdufa
PDUFA: IONS — bepirovirsen in chronic hepatitis B (CHB) — 2026-10-26
FDA target action date 2026-10-26 for IONS (IONIS PHARMACEUTICALS INC). Drug: bepirovirsen. Indicati
Jun 8, 2026 SEC
Ionis Pharmaceuticals appointed Ludwig Hantson, Ph.D. to its Board of Directors effective June 4, 2026, and reported sha
8-K — Impact 3/10
Jun 4, 2026 Insider
HANTSON LUDWIG sold 10,753 shares
Director @ $0.00 ($0.00)
Jun 4, 2026 Insider
Reikes Peter N sold 10,753 shares
Director @ $0.00 ($0.00)
Jun 1, 2026 Insider
BERTHELSEN SPENCER R sold 8,000 shares
Director @ $0.00 ($0.00)
May 28, 2026 SEC
Ionis partner GSK reported positive Phase 3 data for bepirovirsen in chronic hepatitis B, showing a 19% functional cure
8-K — Impact 7/10
May 6, 2026 SEC
Two IONS directors sold approximately $5.1M in stock, which is trivial relative to the company's $12.4B market cap (0.04
CLUSTER — Impact 3/10
Inst.
TWO SIGMA INVESTMENTS, LP — ADD
2,658,646 shares ($210.3M)

Price Targets

$100.92 +35.3% upside Strong Buy
Current $74.58 Low $47.00 Median $105.00 High $130.00 25 analysts
$47.00 $130.00

Analyst Ratings

Strong Buy82% buy · 33 analysts
10Strong Buy
17Buy
6Hold
0Sell
0Strong Sell
Recent Analyst Actions
DateFirmActionRating
Jun 1, 2026 HC Wainwright & Co. REITERATE Buy → Buy
May 19, 2026 Citigroup INITIATE Buy
Apr 30, 2026 RBC Capital MAINTAIN Outperform → Outperform
Apr 30, 2026 Barclays MAINTAIN Overweight → Overweight
Apr 30, 2026 HC Wainwright & Co. MAINTAIN Buy → Buy

Earnings Estimates

PeriodEPS Est.RangeGrowth#
Current Q $-0.87 $-1.03 — $-0.64 -203% YoY 7
Next Q $-0.81 $-0.93 — $-0.61 -32% YoY 7
Current FY $-2.56 $-2.79 — $-2.04 -66% YoY 9
Next FY $-0.62 $-2.21 — $0.26 76% YoY 10

Top Institutional Holders

FundValueMove
FMR LLC$1.9B
VANGUARD GROUP INC$1.3B
TWO SIGMA INVESTMENTS, LP$210.3MADD
Tweedy, Browne Co LLC$195.0M
CHARLES SCHWAB INVESTMENT MANAGEMENT$122.0MNEW

Recent Insider Trades

DateInsiderTypeValue
Jun 4, 2026HANTSON LUDWIGA$0.00
Jun 4, 2026Reikes PeterA$0.00
Jun 1, 2026BERTHELSEN SPENCERM$0.00
Jun 1, 2026BERTHELSEN SPENCERSELL$605.4K
Jun 1, 2026BERTHELSEN SPENCERM$195.4K
10 institutional holders with $3.9B total value (49,805,274 shares) as of 2025-Q4. Top holders: FMR, VANGUARD, TWO. Net buying activity: 2 institutions added/increased vs 1 reduced.

Top Institutional Holders — 2025-Q4

#FundSharesValue% of TrackedLast Move
1FMR LLC24,072,101$1.9B48.3%
2VANGUARD GROUP INC16,440,459$1.3B33.0%
3TWO SIGMA INVESTMENTS, LP2,658,646$210.3M5.3%ADD +68.7%
4Tweedy, Browne Co LLC2,464,930$195.0M4.9%
5CHARLES SCHWAB INVESTMENT MANAGEMENT INC1,541,841$122.0M3.1%NEW
6MORGAN STANLEY1,019,906$80.7M2.0%ADD +29.4%
7BANK OF AMERICA CORP /DE/783,579$62.0M1.6%ADD +29.8%
8NORGES BANK320,160$25.3M0.6%NEW
9WELLS FARGO & COMPANY/MN280,045$22.2M0.6%ADD +35.9%
10RENAISSANCE TECHNOLOGIES LLC223,607$17.7M0.4%TRIM -54.1%

Recent Position Changes

FundActionPrev SharesCurr SharesChange %ValueQuarter
TWO SIGMA INVESTMENTS, LPADD1,575,9432,658,646+68.7%$210.3M2025-Q4
NORGES BANKNEW320,160$25.3M2025-Q4
RENAISSANCE TECHNOLOGIES LLCTRIM486,714223,607-54.1%$17.7M2025-Q4
UBS Group AGTRIM1,529,3231,046,990-31.5%$68.5M2025-Q3
RENAISSANCE TECHNOLOGIES LLCADD270,714486,714+79.8%$31.8M2025-Q3
WELLS FARGO & COMPANY/MNADD209,857285,293+35.9%$18.7M2025-Q3
NORGES BANKEXIT450,2540-100.0%$0.002025-Q3
BANK OF AMERICA CORP /DE/ADD767,432995,890+29.8%$39.3M2025-Q2
NORGES BANKNEW450,254$17.8M2025-Q2
RENAISSANCE TECHNOLOGIES LLCADD153,514270,714+76.3%$10.7M2025-Q2
CITADEL ADVISORS LLCADD2,263,4163,615,962+59.8%$109.1M2025-Q1
TWO SIGMA INVESTMENTS, LPADD921,4391,685,853+83.0%$50.9M2025-Q1
RENAISSANCE TECHNOLOGIES LLCTRIM205,514153,514-25.3%$4.6M2025-Q1
NORGES BANKEXIT1,714,7620-100.0%$0.002025-Q1
CITADEL ADVISORS LLCDOUBLED497,6512,263,416+354.8%$79.1M2024-Q4
UBS Group AGDOUBLED167,8801,917,608+1042.2%$67.0M2024-Q4
CHARLES SCHWAB INVESTMENT MANAGEMENT INCNEW1,443,020$57.8M2024-Q3
MORGAN STANLEYADD1,012,8051,310,451+29.4%$52.5M2024-Q3
14 unique insiders with 19 transactions. Net insider value: -$29.5M ($0.00 bought, $29.5M sold).

Insider Transactions

DateInsiderTitleTypeSharesPriceValue
Jun 4, 2026HANTSON LUDWIGDirectorA10,753$0.00$0.00
Jun 4, 2026Reikes Peter NDirectorA10,753$0.00$0.00
Jun 1, 2026BERTHELSEN SPENCER RDirectorM8,000$0.00$0.00
Jun 1, 2026BERTHELSEN SPENCER RDirectorSELL8,000$75.67$605.4K
Jun 1, 2026BERTHELSEN SPENCER RDirectorM8,000$24.42$195.4K
May 14, 2026Monia Brett PChief Executive OfficerM3,220$32.60$105.0K
May 14, 2026Monia Brett PChief Executive OfficerM3,220$0.00$0.00
May 14, 2026Monia Brett PChief Executive OfficerSELL3,220$78.68$253.3K
May 13, 2026Monia Brett PChief Executive OfficerM1,316$32.60$42.9K
May 13, 2026Monia Brett PChief Executive OfficerSELL1,316$78.01$102.7K
May 13, 2026Monia Brett PChief Executive OfficerM1,316$0.00$0.00
May 4, 2026LOSCALZO JOSEPHDirectorM10,968$0.00$0.00
May 4, 2026LOSCALZO JOSEPHDirectorSELL59,508$74.90$4.5M
May 4, 2026LOSCALZO JOSEPHDirectorM10,968$38.06$417.4K
May 1, 2026KLEIN JOSEPH IIIDirectorM10,111$47.11$476.3K
May 1, 2026KLEIN JOSEPH IIIDirectorM10,111$0.00$0.00
May 1, 2026KLEIN JOSEPH IIIDirectorSELL8,680$73.35$636.7K
Apr 28, 2026Baroldi JosephEVP, Chief Business OfficerSELL1,626$71.79$116.7K
Apr 16, 2026Baroldi JosephEVP, Chief Business OfficerSELL5,619$74.56$419.0K
Apr 16, 2026Birchler BrianEVP, Corp and Development OpsSELL973$75.04$73.0K
Apr 16, 2026Jenne KyleEVP, Chf GL Pdt Str OfcrSELL4,902$75.17$368.5K
Apr 15, 2026Baroldi JosephEVP, Chief Business OfficerM10,837$0.00$0.00
Apr 15, 2026Jenne KyleEVP, Chf GL Pdt Str OfcrM12,226$0.00$0.00
Apr 15, 2026Baroldi JosephEVP, Chief Business OfficerM10,837$0.00$0.00
Apr 15, 2026Birchler BrianEVP, Corp and Development OpsM1,875$0.00$0.00
Apr 15, 2026Birchler BrianEVP, Corp and Development OpsM1,875$0.00$0.00
Apr 15, 2026PARSHALL B LYNNEDirectorSELL4,466$76.19$340.3K
Apr 15, 2026Jenne KyleEVP, Chf GL Pdt Str OfcrM12,226$0.00$0.00
Apr 2, 2026Devers Shannon L.EVP, Chief Human Resources OfcSELL6,193$74.05$458.6K
Apr 1, 2026KLEIN JOSEPH IIIDirectorM12,000$38.06$456.7K
Apr 1, 2026KLEIN JOSEPH IIIDirectorSELL20,105$75.50$1.5M
Apr 1, 2026KLEIN JOSEPH IIIDirectorM12,000$0.00$0.00
Mar 19, 2026Schneider EugeneEVP, Chf Clinical Develop OfcrSELL5,812$70.97$412.5K
Mar 17, 2026HOUGEN ELIZABETH LEVP, Finance & CFOSELL10,172$73.21$744.7K
Mar 16, 2026HOUGEN ELIZABETH LEVP, Finance & CFOM33,118$0.00$0.00
Mar 16, 2026HOUGEN ELIZABETH LEVP, Finance & CFOSELL205,608$72.38$14.9M
Mar 16, 2026HOUGEN ELIZABETH LEVP, Finance & CFOM60,299$60.89$3.7M
Mar 10, 2026Jenne KyleEVP, Chf GL Pdt Str OfcrM4,675$0.00$0.00
Mar 10, 2026Jenne KyleEVP, Chf GL Pdt Str OfcrSELL21,191$75.50$1.6M
Mar 10, 2026Jenne KyleEVP, Chf GL Pdt Str OfcrM32,602$46.10$1.5M
Mar 10, 2026Monia Brett PChief Executive OfficerM34,103$0.00$0.00
Mar 10, 2026Monia Brett PChief Executive OfficerM34,103$60.89$2.1M
Mar 10, 2026Monia Brett PChief Executive OfficerSELL16,512$75.47$1.2M
Mar 9, 2026Monia Brett PChief Executive OfficerM40,822$0.00$0.00
Mar 9, 2026Monia Brett PChief Executive OfficerSELL7,382$74.11$547.1K
Mar 9, 2026Monia Brett PChief Executive OfficerM40,822$60.89$2.5M
Mar 9, 2026O'NEIL PATRICK R.EVP CLO & General CounselSELL10,148$75.25$763.7K
Mar 4, 2026LOSCALZO JOSEPHDirectorM200$38.06$7.6K
Mar 4, 2026LOSCALZO JOSEPHDirectorM200$0.00$0.00
Mar 4, 2026Baroldi JosephEVP, Chief Business OfficerM238$56.78$13.5K

No press releases analyzed yet. Press releases are collected from GlobeNewsWire and analyzed by the LLM pipeline.

Current analyst consensus: Strong Buy (82% buy). Based on 33 analysts: 10 strong buy, 17 buy, 6 hold, 0 sell, 0 strong sell.

Analyst Price Targets

$100.92 mean target +35.3% upside Strong Buy (1.73)
$47.00 Low $130.00 High
MetricValue
Current Price$74.58
Target Low$47.00
Target Mean$100.92
Target Median$105.00
Target High$130.00
# Analysts25
RecommendationStrong Buy (1.73)

Earnings Estimates & Revisions

PeriodEPS AvgEPS LowEPS HighEPS Growth30d Rev.Up/DownRev. AvgRev. GrowthAnalysts
Current Q
2026-06-30
$-0.87 $-1.03 $-0.64 -203.3% +0.0% 4↑ 2↓ $0.2B -58.0% 7
Next Q
2026-09-30
$-0.81 $-0.93 $-0.61 -32.2% +0.0% 5↑ 0↓ $0.2B 29.8% 7
Current FY
2026-12-31
$-2.56 $-2.79 $-2.04 -65.7% -0.0% 7↑ 0↓ $0.9B -5.7% 9
Next FY
2027-12-31
$-0.62 $-2.21 $0.26 75.7% -0.3% 4↑ 3↓ $1.5B 66.8% 10

Current Quarter EPS Revision History

TimepointEPS EstimateChange
Current$-0.874
7d ago$-0.874
30d ago$-0.874
60d ago$-0.947+0.072
90d ago$-0.927+0.052
13 analyst firms have rated this stock: 0 upgrades, 0 downgrades, 2 initiations.

Individual Analyst Actions

DateAnalyst FirmActionPrevious RatingNew Rating
Jun 1, 2026 HC Wainwright & Co. REITERATE Buy Buy
May 19, 2026 Citigroup INITIATE Buy
Apr 30, 2026 RBC Capital MAINTAIN Outperform Outperform
Apr 30, 2026 Barclays MAINTAIN Overweight Overweight
Apr 30, 2026 HC Wainwright & Co. MAINTAIN Buy Buy
Apr 23, 2026 TD Cowen MAINTAIN Buy Buy
Apr 21, 2026 Canaccord Genuity INITIATE Buy
Apr 21, 2026 Morgan Stanley MAINTAIN Overweight Overweight
Apr 9, 2026 B of A Securities MAINTAIN Buy Buy
Mar 26, 2026 Barclays MAINTAIN Overweight Overweight
Mar 25, 2026 Needham MAINTAIN Buy Buy
Mar 25, 2026 HC Wainwright & Co. MAINTAIN Buy Buy
Mar 3, 2026 Leerink Partners MAINTAIN Outperform Outperform
Feb 27, 2026 Piper Sandler MAINTAIN Overweight Overweight
Feb 26, 2026 Stifel MAINTAIN Hold Hold
Feb 26, 2026 Needham MAINTAIN Buy Buy
Feb 6, 2026 Piper Sandler MAINTAIN Overweight Overweight
Jan 5, 2026 Wells Fargo MAINTAIN Overweight Overweight
Dec 17, 2025 RBC Capital MAINTAIN Outperform Outperform
Dec 15, 2025 Leerink Partners MAINTAIN Outperform Outperform

Monthly Consensus History

PeriodStrong BuyBuyHoldSellStrong SellBuy %Distribution
Jun 1, 2026101760082%
May 1, 202691660081%
Apr 1, 202691370076%
Mar 1, 202691370076%
Feb 1, 202691370076%
Jan 1, 202691370076%
Strong BuyBuyHoldSellStrong Sell

No congressional trading data available for this ticker. Data is sourced from Senate and House financial disclosure filings.

No Reddit sentiment data available yet. Sentiment is analyzed from Reddit investment communities on a rolling basis.

Oct 26, 2026
fda_pdufa
PDUFA: IONS — bepirovirsen in chronic hepatitis B (CHB) — 2026-10-26
FDA target action date 2026-10-26 for IONS (IONIS PHARMACEUTICALS INC). Drug: bepirovirsen. Indication: chronic hepatitis B (CHB). NDA accepted for Pr
Sep 22, 2026
fda_pdufa
PDUFA: IONS — zilganersen in Alexander disease — 2026-09-22
FDA target action date 2026-09-22 for IONS (IONIS PHARMACEUTICALS INC). Drug: zilganersen. Indication: Alexander disease. PDUFA action date set for zi
Jun 30, 2026
fda_pdufa
PDUFA: IONS — olezarsen in severe hypertriglyceridemia (sHTG) — 2026-06-30
FDA target action date 2026-06-30 for IONS (IONIS PHARMACEUTICALS INC). Drug: olezarsen. Indication: severe hypertriglyceridemia (sHTG). sNDA accepted
Jun 9, 2026
short_volume
Short Volume: IONS — 57.0% short (0.3M / 0.6M)
Short: 316,982 | Exempt: 73 | TRF Vol: 556,432 | Short Ratio: 57.0% | Off-exchange volume (dark pool + OTC)
Jun 2, 2026
short_volume
Short Volume: IONS — 66.5% short (0.5M / 0.8M)
Short: 533,630 | Exempt: 31 | TRF Vol: 802,247 | Short Ratio: 66.5% | Off-exchange volume (dark pool + OTC)
Jun 1, 2026
short_volume
Short Volume: IONS — 63.0% short (0.3M / 0.5M)
Short: 318,576 | Exempt: 4,545 | TRF Vol: 505,974 | Short Ratio: 63.0% | Off-exchange volume (dark pool + OTC)
May 28, 2026
short_volume
Short Volume: IONS — 76.6% short (0.6M / 0.7M)
Short: 563,932 | Exempt: 615 | TRF Vol: 735,804 | Short Ratio: 76.6% | Off-exchange volume (dark pool + OTC)
May 22, 2026
short_volume
Short Volume: IONS — 58.1% short (0.4M / 0.6M)
Short: 362,241 | Exempt: 14 | TRF Vol: 623,981 | Short Ratio: 58.1% | Off-exchange volume (dark pool + OTC)
May 21, 2026
short_volume
Short Volume: IONS — 76.9% short (0.9M / 1.1M)
Short: 874,404 | Exempt: 1,202 | TRF Vol: 1,137,660 | Short Ratio: 76.9% | Off-exchange volume (dark pool + OTC)
May 20, 2026
short_volume
Short Volume: IONS — 73.4% short (0.6M / 0.8M)
Short: 620,303 | Exempt: 940 | TRF Vol: 844,909 | Short Ratio: 73.4% | Off-exchange volume (dark pool + OTC)
May 19, 2026
short_volume
Short Volume: IONS — 56.6% short (0.3M / 0.6M)
Short: 320,655 | Exempt: 398 | TRF Vol: 566,292 | Short Ratio: 56.6% | Off-exchange volume (dark pool + OTC)
May 18, 2026
dark_pool
Dark Pool: IONS — 3.4M shares, 49,283 trades
Week starting 2026-05-18. Total ATS volume: 3,442,223 shares across 49,283 trades.
May 15, 2026
short_volume
Short Volume: IONS — 67.4% short (0.5M / 0.7M)
Short: 490,283 | Exempt: 58 | TRF Vol: 727,164 | Short Ratio: 67.4% | Off-exchange volume (dark pool + OTC)
May 14, 2026
short_volume
Short Volume: IONS — 58.3% short (0.4M / 0.7M)
Short: 423,666 | Exempt: 250 | TRF Vol: 726,983 | Short Ratio: 58.3% | Off-exchange volume (dark pool + OTC)
May 13, 2026
short_volume
Short Volume: IONS — 58.2% short (0.3M / 0.6M)
Short: 328,229 | Exempt: 526 | TRF Vol: 563,607 | Short Ratio: 58.2% | Off-exchange volume (dark pool + OTC)
May 8, 2026
Clinical Trial
An Extension Study of Donidalorsen (IONIS-PKK-LRx) in Participants With Hereditary Angioedema
Phase Phase 2 — COMPLETED
Apr 23, 2026
Clinical Trial
A Study of Olezarsen (Formerly Known as AKCEA-APOCIII-LRx) in Adults With Hypertriglyceridemia and Atherosclerotic Cardiovascular Disease (Established or at Increased Risk for), and/or With Severe Hypertriglyceridemia
Phase Phase 2 — COMPLETED
Apr 2, 2026
Clinical Trial
FUSION: A Study to Evaluate the Efficacy, Safety, Pharmacokinetics and Pharmacodynamics of ION363 in Amyotrophic Lateral Sclerosis Participants With Fused in Sarcoma Mutations (FUS-ALS)
Phase Phase 3 — ACTIVE_NOT_RECRUITING