Ionis Pharmaceuticals Inc (IONS) Insider Ownership

Historic Insider Ownership Trends

Over the 90-day window ending February 07, 2026, Ionis Pharmaceuticals's three dominant insider ownership positions are held by Chief Executive Officer Brett P Monia (283.93K shares), Director Spencer R Berthelsen (156.01K shares), Evp And Finance & Cfo Elizabeth L Hougen (132.88K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Brett P Monia Chief Executive Officer 283,927 02 Feb, 2026
Spencer R Berthelsen 156,013 17 Jul, 2025
Elizabeth L Hougen Evp And Finance & Cfo 132,881 02 Feb, 2026
C Frank Bennett Evp And Chief Scientific Officer 80,293 04 Feb, 2026
Patrick R. O'Neil Evp Clo & General Counsel 71,983 02 Feb, 2026
Eugene Schneider Evp And Chf Clinical Develop Ofcr 69,702 02 Feb, 2026
Brian Birchler Evp And Corp And Development Ops 66,247 02 Feb, 2026
B Lynne Parshall 61,344 16 Oct, 2025
Richard S Geary Evp And Chief Development Officer 59,657 07 Nov, 2025
Frederick T Muto 59,597 19 Jul, 2022
Michael R Hayden 54,298 17 Jul, 2025
Joseph H Wender 52,035 20 Nov, 2025
Joseph Baroldi Evp And Chief Business Officer 50,185 02 Feb, 2026
Eric Swayze Evp Research 48,065 02 Feb, 2026
Joan E Herman 46,086 20 Nov, 2025
Joseph Loscalzo 36,330 03 Nov, 2025
Onaiza Cadoret-Manier Evp And Chf Gl Pdt Str & Oper Ofc 35,825 02 Feb, 2024
Shannon L. Devers Evp And Chief Human Resources Ofc 22,541 23 Jan, 2026
Allene M. Diaz 18,368 26 Aug, 2025
Kyle Jenne Evp And Chf Gl Pdt Str Ofcr 16,389 20 Jan, 2026
Joseph Iii Klein 16,346 17 Nov, 2023
Holly B. Kordasiewicz Evp And Chief Development Officer 14,718 20 Jan, 2026
Peter N Reikes 14,222 19 Oct, 2021
Michael J. Yang 7,940 20 Jan, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
02 Feb, 2026 C Frank Bennett Common Stock D 48,626 $83.03 80,293 D S
02 Feb, 2026 C Frank Bennett Common Stock A 16,463 $32.60 96,756 D M
02 Feb, 2026 C Frank Bennett Common Stock D 16,463 $83.03 80,293 D S
02 Feb, 2026 C Frank Bennett Common Stock D 20,000 $82.60 80,293 D S
02 Feb, 2026 C Frank Bennett Common Stock A 48,626 $60.89 128,919 D M
30 Jan, 2026 C Frank Bennett Common Stock D 5,885 $82.95 100,293 D S
30 Jan, 2026 Elizabeth L Hougen Common Stock D 6,988 $83.24 132,881 D S
30 Jan, 2026 Brett P Monia Common Stock D 62,970 $82.72 283,927 D S
30 Jan, 2026 Patrick R. O'Neil Common Stock D 6,179 $83.53 71,983 D S
30 Jan, 2026 Eric Swayze Common Stock D 6,179 $82.93 47,747 D S
30 Jan, 2026 Joseph Baroldi Common Stock D 5,296 $82.96 45,413 D S
30 Jan, 2026 Eugene Schneider Common Stock D 6,179 $83.45 69,702 D S
30 Jan, 2026 Brian Birchler Common Stock D 6,179 $83.03 66,247 D S
29 Jan, 2026 C Frank Bennett Common Stock A 11,421 $0.00 106,178 D A
29 Jan, 2026 Elizabeth L Hougen Common Stock A 13,562 $0.00 139,869 D A
29 Jan, 2026 Brett P Monia Common Stock A 122,214 $0.00 346,897 D A
29 Jan, 2026 Patrick R. O'Neil Common Stock A 11,991 $0.00 78,162 D A
29 Jan, 2026 Eric Swayze Common Stock A 11,991 $0.00 53,926 D A
29 Jan, 2026 Joseph Baroldi Common Stock A 10,278 $0.00 50,709 D A
29 Jan, 2026 Eugene Schneider Common Stock A 11,991 $0.00 75,881 D A