Ionis Pharmaceuticals Inc (IONS) Insider Ownership

Historic Insider Ownership Trends

IONS's three largest insider shareholders as of March 23, 2026 are Brett P Monia (Chief Executive Officer, 242.66K shares), Spencer R Berthelsen (Director, 156.01K shares), Elizabeth L Hougen (Evp, Finance Cfo, 132.88K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Brett P Monia Chief Executive Officer 242,662 0 11 Mar, 2026
Elizabeth L Hougen Evp, Finance Cfo 82,660 0 18 Mar, 2026
Eugene Schneider Evp, Chf Clinical Develop Ofcr 63,890 0 23 Mar, 2026
Patrick R. O'Neil Evp Clo General Counsel 62,211 0 11 Mar, 2026
Frederick T Muto 59,597 0 18 Jul, 2022
B Lynne Parshall 56,344 0 12 Feb, 2026
Joseph Loscalzo 36,330 0 05 Mar, 2026
Joseph H Wender 0 36,035 03 Dec, 2025
Eric Swayze Evp Research 32,361 0 03 Mar, 2026
Kyle Jenne Evp, Chf Gl Pdt Str Ofcr 16,389 0 11 Mar, 2026
Joseph H Wender 16,000 0 19 Nov, 2025
Holly B. Kordasiewicz Evp, Chief Development Officer 14,718 0 20 Jan, 2026
Peter N Reikes 14,222 0 19 Oct, 2021
Joseph Iii Klein 11,014 0 05 Mar, 2026
Michael J. Yang 7,940 0 20 Jan, 2026
Eric Swayze Evp Research 0 318 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
19 Mar, 2026 Eugene Schneider Common Stock D 5,812 $70.97 63,890 D S
16 Mar, 2026 Elizabeth L Hougen Common Stock A 60,299 $60.89 193,180 D M
16 Mar, 2026 Elizabeth L Hougen Common Stock A 61,041 $56.78 254,221 D M
16 Mar, 2026 Elizabeth L Hougen Common Stock A 33,118 $32.60 287,339 D M
16 Mar, 2026 Elizabeth L Hougen Common Stock A 20,541 $37.58 307,880 D M
16 Mar, 2026 Elizabeth L Hougen Common Stock D 205,608 $72.38 102,272 D S
16 Mar, 2026 Elizabeth L Hougen Common Stock D 9,440 $72.77 92,832 D S
17 Mar, 2026 Elizabeth L Hougen Common Stock D 10,172 $73.21 82,660 D S
16 Mar, 2026 Elizabeth L Hougen Non-Qualified Stock Option (right to buy) D 33,118 $0.00 0 D M
16 Mar, 2026 Elizabeth L Hougen Non-Qualified Stock Option (right to buy) D 20,541 $0.00 5,405 D M
16 Mar, 2026 Elizabeth L Hougen Non-Qualified Stock Option (right to buy) D 61,041 $0.00 0 D M
16 Mar, 2026 Elizabeth L Hougen Non-Qualified Stock Option (right to buy) D 60,299 $0.00 0 D M
09 Mar, 2026 Brett P Monia Common Stock A 40,822 $60.89 295,803 D M
09 Mar, 2026 Patrick R. O'Neil Common Stock D 10,148 $75.25 62,211 D S
10 Mar, 2026 Kyle Jenne Common Stock A 32,602 $46.10 48,991 D M
09 Mar, 2026 Brett P Monia Common Stock A 73,529 $60.89 369,332 D M
10 Mar, 2026 Kyle Jenne Common Stock D 21,191 $75.50 27,800 D S
09 Mar, 2026 Brett P Monia Common Stock D 7,382 $74.11 361,950 D S
10 Mar, 2026 Kyle Jenne Common Stock D 16,086 $76.30 11,714 D S
09 Mar, 2026 Brett P Monia Common Stock D 117,604 $75.26 244,346 D S