IONS (Ionis Pharmaceuticals, Inc. Common Stock)

Insider Trading Activity

Every open-market purchase and sale reported by IONS officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.

Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.

Form 4 Filings
50
most recent
Open-Market Buys
1
code P
Sales
7
code S
Reporting Insiders
25
current holders
IONS — Recent Form 4 Transactions (latest 2026-09-02)
FiledInsiderRole TypeSharesValue
2026-09-02 C FRANK BENNETT EVP, Chief Scientific Officer J
2026-09-02 Brian Birchler EVP, Corp and Development Ops J
2026-09-02 PATRICK R. O'NEIL EVP CLO & General Counsel J
2026-09-02 Brett P Monia Chief Executive Officer J
2026-07-31 Michael R Hayden Director Buy
2026-07-17 LUDWIG HANTSON Director A
2026-07-17 Peter N Reikes Director A
2026-07-17 JOAN E HERMAN Director M
2026-07-17 SPENCER R BERTHELSEN Director M
2026-07-09 Holly B. Kordasiewicz EVP, Chief Development Officer Sell
2026-07-09 Allene M. Diaz Director MIXED
2026-07-09 C FRANK BENNETT EVP, Chief Scientific Officer MIXED
2026-07-06 SPENCER R BERTHELSEN Director A
2026-07-06 JOAN E HERMAN Director A
2026-07-06 Michael R Hayden Director A
2026-07-06 JOSEPH LOSCALZO Director A
2026-07-06 MICHAEL J. YANG Director A
2026-07-06 JOSEPH KLEIN III Director MIXED
2026-07-06 Allene M. Diaz Director A
2026-06-26 Brett P Monia Chief Executive Officer MIXED
2026-06-26 Eric Swayze EVP Research Sell
2026-06-16 SPENCER R BERTHELSEN Director MIXED
2026-06-16 Holly B. Kordasiewicz EVP, Chief Development Officer MIXED
2026-06-08 Peter N Reikes Director A
2026-06-08 LUDWIG HANTSON Director A
2026-06-03 SPENCER R BERTHELSEN Director MIXED
2026-05-15 Brett P Monia Chief Executive Officer MIXED
2026-05-06 JOSEPH LOSCALZO Director MIXED
2026-05-05 JOSEPH KLEIN III Director MIXED
2026-04-30 Joseph Baroldi EVP, Chief Business Officer Sell
2026-04-17 Joseph Baroldi EVP, Chief Business Officer MIXED
2026-04-17 Brian Birchler EVP, Corp and Development Ops MIXED
2026-04-17 Kyle Jenne EVP, Chf GL Pdt Str Ofcr MIXED
2026-04-17 B LYNNE PARSHALL Director Sell
2026-04-02 Shannon L. Devers EVP, Chief Human Resources Ofc Sell
2026-04-02 JOSEPH KLEIN III Director MIXED
2026-03-23 Eugene Schneider EVP, Chf Clinical Develop Ofcr Sell
2026-03-18 ELIZABETH L HOUGEN EVP, Finance & CFO MIXED
2026-03-11 Kyle Jenne EVP, Chf GL Pdt Str Ofcr MIXED
2026-03-11 Brett P Monia Chief Executive Officer MIXED
2026-03-11 PATRICK R. O'NEIL EVP CLO & General Counsel Sell
2026-03-05 Joseph Baroldi EVP, Chief Business Officer MIXED
2026-03-05 C FRANK BENNETT EVP, Chief Scientific Officer MIXED
2026-03-05 Shannon L. Devers EVP, Chief Human Resources Ofc MIXED
2026-03-05 Allene M. Diaz Director MIXED
2026-03-05 JOSEPH KLEIN III Director MIXED
2026-03-05 JOSEPH LOSCALZO Director MIXED
2026-03-03 C FRANK BENNETT EVP, Chief Scientific Officer J
2026-03-03 Brian Birchler EVP, Corp and Development Ops J
2026-03-03 Brett P Monia Chief Executive Officer J
IONS — Current Insider Holders
InsiderRole Shares HeldValue
Exec Chairman of the Board 496,412
EVP, Finance & CFO 254,221
Chief Executive Officer 242,760
Director 161,303
EVP, Corp and Development Ops 102,883
EVP, Chief Development Officer 77,957
Director 73,298
EVP, Chf Clinical Develop Ofcr 63,890
EVP, Chief Scientific Officer 60,128
EVP CLO & General Counsel 59,205
Director 58,432
Director 52,035
Director 51,344
Director 51,306
EVP, Chief Business Officer 49,256
Director 47,298
EVP,Chf GL Pdt Str & Oper Ofc 35,788
EVP, Chf GL Pdt Str Ofcr 28,615
Director 22,633
EVP, Chief Development Officer 22,096
EVP Research 22,077
Director 18,516
EVP, Chief Human Resources Ofc 16,348
Director 14,222
Chief Business Officer 11,127
How to read Form 4 activity

Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.

Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.

Full filing history and per-insider positions are on the IONS quote page; the site-wide leaderboard is on the insider transactions hub.