According to recent filings covering the 90 days ending February 19, 2026, the three most significant insider holders at Ionis Pharmaceuticals are Chief Executive Officer Brett P Monia (254.50K shares), Director Spencer R Berthelsen (156.01K shares), Evp And Finance & Cfo Elizabeth L Hougen (132.88K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Brett P Monia | Chief Executive Officer | 254,497 | 09 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 |
| Richard S Geary | Evp And Chief Development Officer | 59,657 | 07 Nov, 2025 |
| Frederick T Muto | 59,597 | 19 Jul, 2022 | |
| B Lynne Parshall | 56,344 | 12 Feb, 2026 | |
| 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 |
| 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 |
| Eric Swayze | Evp Research | 32,423 | 13 Feb, 2026 |
| 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.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 13 Feb, 2026 | Eric Swayze | Common Stock | D | 9,435 | $81.56 | 38,312 | D | S |
| 13 Feb, 2026 | Eric Swayze | Common Stock | D | 6,207 | $82.07 | 32,105 | D | S |
| 11 Feb, 2026 | B Lynne Parshall | Common Stock | D | 5,000 | $82.72 | 56,344 | D | S |
| 06 Feb, 2026 | Brett P Monia | Common Stock | D | 29,430 | $85.79 | 254,497 | D | S |
| 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 | 48,626 | $60.89 | 128,919 | 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 | A | 16,463 | $32.60 | 96,756 | D | M |
| 02 Feb, 2026 | C Frank Bennett | Common Stock | D | 20,000 | $82.60 | 80,293 | D | S |
| 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 |