As of May 04, 2026, the three largest insider holders of IONS are Brett P Monia (Chief Executive Officer, 242.66K shares), Brett P Monia (Chief Executive Officer, 242.66K shares), Spencer R Berthelsen (Director, 156.01K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Brett P Monia | Chief Executive Officer | 242,662 | 0 | 11 Mar, 2026 |
| Brett P Monia | Chief Executive Officer | 242,662 | 0 | 11 Mar, 2026 |
| Spencer R Berthelsen | - | 156,013 | 0 | 17 Jul, 2025 |
| Elizabeth L Hougen | Evp, Finance Cfo | 82,660 | 0 | 18 Mar, 2026 |
| C Frank Bennett | Evp, Chief Scientific Officer | 80,554 | 0 | 05 Mar, 2026 |
| Brian Birchler | Evp, Corp And Development Ops | 67,500 | 0 | 17 Apr, 2026 |
| Eugene Schneider | Evp, Chf Clinical Develop Ofcr | 63,890 | 0 | 23 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 |
| Patrick R. O'Neil | Evp Clo General Counsel | 62,211 | 0 | 11 Mar, 2026 |
| Richard S Geary | Evp, Chief Development Officer | 59,657 | 0 | 07 Nov, 2025 |
| Frederick T Muto | - | 59,597 | 0 | 18 Jul, 2022 |
| Frederick T Muto | - | 59,597 | 0 | 18 Jul, 2022 |
| Michael R Hayden | - | 54,298 | 0 | 17 Jul, 2025 |
| B Lynne Parshall | Coo | 51,344 | 0 | 17 Apr, 2026 |
| Joseph Baroldi | Evp, Chief Business Officer | 46,535 | 0 | 17 Apr, 2026 |
| Joan E Herman | - | 46,086 | 0 | 20 Nov, 2025 |
| Joseph Loscalzo | - | 36,330 | 0 | 05 Mar, 2026 |
| Joseph H Wender | - | 0 | 36,035 | 03 Dec, 2025 |
| Joseph H Wender | - | 0 | 36,035 | 03 Dec, 2025 |
| Onaiza Cadoret-Manier | Evp, Chf Gl Pdt Str Oper Ofc | 35,825 | 0 | 02 Feb, 2024 |
| Eric Swayze | Evp Research | 32,361 | 0 | 03 Mar, 2026 |
| Eric Swayze | Evp Research | 32,361 | 0 | 03 Mar, 2026 |
| Kyle Jenne | Evp, Chf Gl Pdt Str Ofcr | 23,713 | 0 | 17 Apr, 2026 |
| Shannon L. Devers | Evp, Chief Human Resources Ofc | 16,348 | 0 | 02 Apr, 2026 |
| Joseph H Wender | - | 16,000 | 0 | 19 Nov, 2025 |
| Joseph H Wender | - | 16,000 | 0 | 19 Nov, 2025 |
| Holly B. Kordasiewicz | Evp, Chief Development Officer | 14,718 | 0 | 20 Jan, 2026 |
| Holly B. Kordasiewicz | Evp, Chief Development Officer | 14,718 | 0 | 20 Jan, 2026 |
| Peter N Reikes | - | 14,222 | 0 | 19 Oct, 2021 |
| Peter N Reikes | - | 14,222 | 0 | 19 Oct, 2021 |
| Joseph Iii Klein | - | 11,014 | 0 | 02 Apr, 2026 |
| Michael J. Yang | - | 7,940 | 0 | 20 Jan, 2026 |
| Michael J. Yang | - | 7,940 | 0 | 20 Jan, 2026 |
| Joseph Baroldi | Evp, Chief Business Officer | 0 | 4,347 | 05 Mar, 2026 |
| Allene M. Diaz | - | 3,811 | 0 | 05 Mar, 2026 |
| Eric Swayze | Evp Research | 0 | 318 | 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.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 15 Apr, 2026 | Joseph Baroldi | Common Stock | A | 10,837 | $0.00 | 52,154 | D | M |
| 15 Apr, 2026 | Kyle Jenne | Common Stock | A | 12,226 | $0.00 | 28,615 | D | M |
| 15 Apr, 2026 | Brian Birchler | Common Stock | A | 1,875 | $0.00 | 68,473 | D | M |
| 15 Apr, 2026 | B Lynne Parshall | Common Stock | D | 4,466 | $76.19 | 51,878 | D | S |
| 16 Apr, 2026 | Joseph Baroldi | Common Stock | D | 5,619 | $74.56 | 46,535 | D | S |
| 15 Apr, 2026 | B Lynne Parshall | Common Stock | D | 534 | $76.97 | 51,344 | D | S |
| 16 Apr, 2026 | Kyle Jenne | Common Stock | D | 4,902 | $75.17 | 23,713 | D | S |
| 16 Apr, 2026 | Brian Birchler | Common Stock | D | 973 | $75.04 | 67,500 | D | S |
| 15 Apr, 2026 | Kyle Jenne | Restricted Stock Unit | D | 12,226 | $0.00 | 74,402 | D | M |
| 15 Apr, 2026 | Brian Birchler | Restricted Stock Unit | D | 1,875 | $0.00 | 48,926 | D | M |
| 15 Apr, 2026 | Joseph Baroldi | Restricted Stock Unit | D | 10,837 | $0.00 | 48,312 | D | M |
| 02 Apr, 2026 | Shannon L. Devers | Common Stock | D | 6,193 | $74.05 | 16,348 | D | S |
| 01 Apr, 2026 | Joseph Iii Klein | Common Stock | A | 12,000 | $38.06 | 23,014 | D | M |
| 01 Apr, 2026 | Joseph Iii Klein | Common Stock | A | 10,321 | $41.08 | 33,335 | D | M |
| 01 Apr, 2026 | Joseph Iii Klein | Common Stock | D | 20,105 | $75.50 | 13,230 | D | S |
| 01 Apr, 2026 | Joseph Iii Klein | Common Stock | D | 2,216 | $75.95 | 11,014 | D | S |
| 01 Apr, 2026 | Joseph Iii Klein | Non-Qualified Stock Option (right to buy) | D | 12,000 | $0.00 | 0 | D | M |
| 01 Apr, 2026 | Joseph Iii Klein | Non-Qualified Stock Option (right to buy) | D | 10,321 | $0.00 | 0 | D | M |
| 19 Mar, 2026 | Eugene Schneider | Common Stock | D | 5,812 | $70.97 | 63,890 | D | S |
| 19 Mar, 2026 | Eugene Schneider | Common Stock | D | 5,812 | $70.97 | 63,890 | D | S |