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Ionis Pharmaceuticals Inc

IONS
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0000874015

In the last 90 days, Ionis Pharmaceuticals Inc insiders filed 1 open-market purchase and 4 sales; 515 institutions reported holding it in 13F filings for Q2 2026, worth $14.3B in total; ARK Invest is the only superinvestor holding it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Ionis Pharmaceuticals Inc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
1 filing
1 insider, $1.06M in total
Open-market sells
4 filings
4 insiders, $3.55M in total
Insiders trading
5
Net value
−$2.49M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Ionis Pharmaceuticals Inc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Ionis Pharmaceuticals Inc
NameTitleLast reported holdingLast filingFilings, past year
Bennett C FrankEVP, Chief Scientific Officer60,128Sep 2, 20268
O'Neil Patrick R.EVP CLO & General Counsel59,205Sep 2, 202610
Monia Brett PChief Executive Officer242,760Sep 2, 202610
Birchler BrianEVP, Corp and Development Ops102,883Sep 2, 20268
Hayden Michael RDirector24,000IndirectJul 31, 20262
Reikes Peter NDirector14,222Jul 17, 20262
Hantson LudwigDirector–Jul 17, 20262
Herman Joan EDirector51,306Jul 17, 20263
Berthelsen Spencer RDirector161,233Jul 17, 20264
Diaz Allene M.Director3,811Jul 9, 20263
Kordasiewicz Holly B.EVP, Chief Development Officer22,096Jul 9, 20264
Yang Michael J.Director7,940Jul 6, 20262
Loscalzo JosephDirector36,330Jul 6, 20264
Klein Joseph IIIDirector11,014Jul 6, 20265
Baroldi JosephEVP, Chief Business Officer4,669IndirectJun 30, 20269
Schneider EugeneEVP, Chf Clinical Develop Ofcr77,114Jun 30, 20265
Swayze EricEVP Research21,759Jun 26, 20269
Parshall B LynneDirector51,344Apr 17, 20263
Jenne KyleEVP, Chf GL Pdt Str Ofcr23,713Apr 17, 20264
Devers Shannon L.EVP, Chief Human Resources Ofc16,348Apr 2, 20268
Hougen Elizabeth LEVP, Finance & CFO82,660Mar 18, 20265
Wender Joseph HDirector36,035IndirectDec 3, 20254
Geary Richard SEVP, Chief Development Officer59,657Nov 7, 20253
Cadoret-Manier OnaizaEVP,Chf GL Pdt Str & Oper Ofc35,788Sep 4, 20240
Muto Frederick TDirector59,597Jul 19, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jan 20, 2026 (view filing)Jan 164 daysSwayze EricEVP ResearchSSale−49$75.97−$3.72K−13.4%318 after
Jan 20, 2026 (view filing)Jan 164 daysSchneider EugeneEVP, Chf Clinical Develop OfcrSSale−9.30K$75.59−$703.1K−12.7%63.9K after
Jan 20, 2026 (view filing)Jan 164 daysO'Neil Patrick R.EVP CLO & General CounselSSale−9.19K$75.84−$697.0K−12.2%66.2K after
Jan 20, 2026 (view filing)Jan 164 daysMonia Brett PChief Executive OfficerSSale−44.0K$74.82−$3.29M−16.4%224.7K after
Jan 20, 2026 (view filing)Jan 164 daysKordasiewicz Holly B.EVP, Chief Development OfficerSSale−4.14K$75.66−$313.3K−22.0%14.7K after
Jan 20, 2026 (view filing)Jan 164 daysJenne KyleEVP, Chf GL Pdt Str OfcrSSale−1.82K$75.96−$138.5K−10.0%16.4K after
Jan 20, 2026 (view filing)Jan 164 daysHougen Elizabeth LEVP, Finance & CFOSSale−12.9K$75.22−$972.0K−9.3%126.3K after
Jan 20, 2026 (view filing)Jan 164 daysDevers Shannon L.EVP, Chief Human Resources OfcSSale−8.35K$75.95−$634.4K−24.0%26.5K after
Jan 20, 2026 (view filing)Jan 164 daysBirchler BrianEVP, Corp and Development OpsSSale−8.48K$75.11−$636.9K−12.3%60.4K after
Jan 20, 2026 (view filing)Jan 164 daysBennett C FrankEVP, Chief Scientific OfficerSSale−8.98K$75.15−$674.6K−8.7%94.8K after
Jan 20, 2026 (view filing)Jan 164 daysBaroldi JosephEVP, Chief Business OfficerSSale−6.91K$75.75−$523.2K−14.6%40.4K after
Jan 20, 2026 (view filing)Jan 164 daysBaroldi JosephEVP, Chief Business OfficerSSale−1.15K$75.78−$87.1K−19.4%4.77K after
Jan 9, 2026 (view filing)Jan 72 daysDevers Shannon L.EVP, Chief Human Resources OfcSSale−44.2K$85.08−$3.76M−71.6%17.5K after5 lots10b5-1
Jan 6, 2026 (view filing)Jan 24 daysSwayze EricEVP ResearchSSale−23.5K$79.12−$1.86M−43.5%30.5K after2 lots10b5-1
Dec 3, 2025 (view filing)Dec 12 daysWender Joseph HDirectorSSale−28.0K$80.82−$2.26M−43.7%36.0K after2 lots10b5-1
Nov 28, 2025 (view filing)Nov 253 daysKlein Joseph IIIDirectorSSale−12.0K$80.00−$960.0K−100.0%0 after3 lots10b5-1
Nov 28, 2025 (view filing)Nov 253 daysDevers Shannon L.EVP, Chief Human Resources OfcSSale−16.8K$80.91−$1.36M−49.0%17.5K after10b5-1
Nov 20, 2025 (view filing)Nov 191 dayHerman Joan EDirectorSSale−44.0K$72.13−$3.17M−48.8%46.1K after2 lots
Nov 7, 2025 (view filing)Nov 61 dayBirchler BrianEVP, Corp and Development OpsSSale−8.00K$76.17−$609.4K−14.1%48.8K after10b5-1
Nov 7, 2025 (view filing)Nov 5-62 daysGeary Richard SEVP, Chief Development OfficerSSale−34.6K$75.69−$2.62M−36.7%59.7K after4 lots10b5-1
Nov 7, 2025 (view filing)Nov 34 daysGeary Richard SEVP, Chief Development OfficerSSale−1.68K$75.05−$126.1K−2.7%59.7K afterAmended2 lots10b5-1
Nov 3, 2025 (view filing)Oct 313 daysGeary Richard SEVP, Chief Development OfficerSSale−89.2K$75.11−$6.70M−59.9%59.7K afterFrom original3 lots10b5-1
Nov 3, 2025 (view filing)Oct 30-314 daysWender Joseph HDirectorSSale−28.0K$74.02−$2.07M−30.4%64.0K after4 lots10b5-1
Nov 3, 2025 (view filing)Oct 313 daysLoscalzo JosephDirectorSSale−16.0K$75.10−$1.20M−30.6%36.3K after10b5-1
Oct 16, 2025 (view filing)Oct 16Same daySwayze EricEVP ResearchSSale−53$73.62−$3.90K−17.2%256 after
Oct 16, 2025 (view filing)Oct 151 dayParshall B LynneDirectorSSale−5.00K$71.74−$358.7K−7.5%61.3K after10b5-1
Oct 16, 2025 (view filing)Oct 15-161 dayDevers Shannon L.EVP, Chief Human Resources OfcSSale−7.26K$73.06−$530.6K−29.3%17.5K after2 lots10b5-1
Oct 16, 2025 (view filing)Oct 14-152 daysBirchler BrianEVP, Corp and Development OpsSSale−23.9K$72.13−$1.72M−29.6%56.8K after2 lots10b5-1
Oct 8, 2025 (view filing)Oct 62 daysSwayze EricEVP ResearchSSale−6.85K$69.02−$472.7K−18.4%30.5K after10b5-1
Oct 8, 2025 (view filing)Oct 62 daysO'Neil Patrick R.EVP CLO & General CounselSSale−13.4K$69.74−$937.4K−20.0%53.9K after2 lots10b5-1
Oct 8, 2025 (view filing)Oct 62 daysMonia Brett PChief Executive OfficerSSale−437$69.26−$30.3K−0.2%179.6K after10b5-1
Oct 8, 2025 (view filing)Oct 62 daysBaroldi JosephEVP, Chief Business OfficerSSale−1.63K$69.37−$112.7K−5.1%30.3K after10b5-1
Oct 2, 2025 (view filing)Oct 11 dayWender Joseph HDirectorSSale−16.8K$65.50−$1.10M−15.4%92.0K after10b5-1
Oct 2, 2025 (view filing)Oct 1-21 daySwayze EricEVP ResearchSSale−27.1K$66.16−$1.79M−42.1%37.3K after2 lots10b5-1
Oct 2, 2025 (view filing)Oct 2Same dayO'Neil Patrick R.EVP CLO & General CounselSSale−64.7K$67.69−$4.38M−53.1%57.1K after2 lots10b5-1
Oct 2, 2025 (view filing)Oct 2Same dayBaroldi JosephEVP, Chief Business OfficerSSale−15.0K$68.01−$1.02M−32.0%31.9K after10b5-1
Oct 1, 2025 (view filing)Sep 29-302 daysO'Neil Patrick R.EVP CLO & General CounselSSale−25.3K$64.62−$1.63M−30.7%57.1K after2 lots10b5-1
Oct 1, 2025 (view filing)Sep 301 dayGeary Richard SEVP, Chief Development OfficerSSale−57.9K$65.24−$3.78M−42.1%79.7K after10b5-1
Oct 1, 2025 (view filing)Sep 301 dayHougen Elizabeth LEVP, Finance & CFOSSale−49.8K$65.26−$3.25M−31.1%110.5K after10b5-1
Sep 16, 2025 (view filing)Sep 124 daysO'Neil Patrick R.EVP CLO & General CounselSSale−1.70K$64.58−$109.8K−2.9%57.1K after10b5-1
Sep 11, 2025 (view filing)Sep 92 daysBaroldi JosephEVP, Chief Business OfficerSSale−11.9K$62.16−$742.8K−27.2%31.9K after10b5-1
Sep 11, 2025 (view filing)Sep 92 daysO'Neil Patrick R.EVP CLO & General CounselSSale−21.0K$64.56−$1.36M−26.9%57.1K after2 lots10b5-1
Sep 9, 2025 (view filing)Sep 54 daysBaroldi JosephEVP, Chief Business OfficerSSale−250$62.00−$15.5K−0.8%31.9K after10b5-1
Sep 9, 2025 (view filing)Sep 54 daysBennett C FrankEVP, Chief Scientific OfficerSSale−6.00K$59.60−$357.6K−6.8%82.7K after10b5-1
Sep 4, 2025 (view filing)Sep 22 daysSwayze EricEVP ResearchSSale−11.1K$49.67−$552.9K−23.0%37.3K after2 lots10b5-1
Sep 4, 2025 (view filing)Sep 2-32 daysWender Joseph HDirectorSSale−28.0K$57.58−$1.61M−20.5%108.8K after3 lots10b5-1Duplicate filing
Sep 4, 2025 (view filing)Sep 22 daysParshall B LynneDirectorSSale−20.0K$50.91−$1.02M−23.2%66.3K after2 lots10b5-1
Sep 4, 2025 (view filing)Sep 31 dayMonia Brett PChief Executive OfficerSSale−203.8K$60.32−$12.3M−53.1%180.0K after3 lots
Sep 4, 2025 (view filing)Sep 31 dayKlein Joseph IIIDirectorSSale−28.0K$60.00−$1.68M−100.0%0 after10b5-1Duplicate filing
Sep 4, 2025 (view filing)Sep 31 dayKlein Joseph IIIDirectorSSale−28.0K$60.00−$1.68M−100.0%0 after10b5-1