Based on data from the past 90 days ending December 12, 2025, Ionis Pharmaceuticals's three largest insider shareholders are Chief Executive Officer Brett P Monia (179.57K shares), Director B Lynne Parshall (61.34K shares), EVP And Chief Development Officer Richard S Geary (59.66K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Stanley T Crooke | Exec Chairman Of The Board | 496,412 | 28 Jan, 2021 |
| Brett P Monia | Chief Executive Officer | 179,572 | 08 Oct, 2025 |
| Spencer R Berthelsen | 156,013 | 17 Jul, 2025 | |
| Elizabeth L Hougen | EVP And Finance & Cfo | 110,500 | 01 Oct, 2025 |
| C Frank Bennett | EVP And Chief Scientific Officer | 82,679 | 09 Sep, 2025 |
| 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 | |
| Patrick R. O'Neil | EVP Clo & General Counsel | 53,889 | 08 Oct, 2025 |
| Joseph H Wender | 52,035 | 20 Nov, 2025 | |
| Eugene Schneider | EVP And CHF Clinical Develop Ofcr | 51,507 | 04 Sep, 2025 |
| Brian Birchler | EVP And Corp And Development Ops | 48,826 | 07 Nov, 2025 |
| 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 |
| Joseph Baroldi | EVP And Chief Business Officer | 33,372 | 08 Oct, 2025 |
| Eric Swayze | EVP Research | 30,709 | 08 Oct, 2025 |
| Allene M. Diaz | 18,368 | 26 Aug, 2025 | |
| Shannon L. Devers | EVP And Chief Human Resources Ofc | 17,494 | 28 Nov, 2025 |
| Joseph Iii Klein | 16,346 | 17 Nov, 2023 | |
| Peter N Reikes | 14,222 | 19 Oct, 2021 | |
| Kyle Jenne | EVP And CHF Gl Pdt Str Ofcr | 11,199 | 17 Apr, 2025 |
| Michael J. Yang | 6,010 | 17 Jul, 2025 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 01 Dec, 2025 | Joseph H Wender | Common Stock | D | 20,571 | $80.67 | 43,464 | I | S |
| 01 Dec, 2025 | Joseph H Wender | Common Stock | D | 7,429 | $81.23 | 36,035 | I | S |
| 25 Nov, 2025 | Joseph Iii Klein | Common Stock | A | 4,000 | $0.00 | 4,000 | I | M |
| 25 Nov, 2025 | Shannon L. Devers | Common Stock | A | 16,777 | $53.77 | 34,271 | D | M |
| 25 Nov, 2025 | Joseph Iii Klein | Common Stock | D | 4,000 | $80.00 | 0 | I | S |
| 25 Nov, 2025 | Shannon L. Devers | Common Stock | D | 16,777 | $80.91 | 17,494 | D | S |
| 25 Nov, 2025 | Joseph Iii Klein | Common Stock | A | 4,000 | $0.00 | 4,000 | I | M |
| 25 Nov, 2025 | Joseph Iii Klein | Common Stock | D | 4,000 | $80.00 | 0 | I | S |
| 25 Nov, 2025 | Joseph Iii Klein | Common Stock | A | 4,000 | $0.00 | 4,000 | I | M |
| 25 Nov, 2025 | Joseph Iii Klein | Common Stock | D | 4,000 | $80.00 | 0 | I | S |
| 19 Nov, 2025 | Joan E Herman | Common Stock | A | 12,000 | $40.05 | 58,086 | D | M |
| 19 Nov, 2025 | Joan E Herman | Common Stock | D | 12,000 | $72.13 | 46,086 | D | S |
| 19 Nov, 2025 | Joan E Herman | Common Stock | A | 32,000 | $63.90 | 78,086 | D | M |
| 19 Nov, 2025 | Joan E Herman | Common Stock | D | 32,000 | $72.13 | 46,086 | D | S |
| 18 Nov, 2025 | Joseph H Wender | Common Stock | A | 16,000 | $24.42 | 16,000 | D | M |
| 06 Nov, 2025 | Brian Birchler | Common Stock | D | 8,000 | $76.17 | 48,826 | D | S |
| 05 Nov, 2025 | Richard S Geary | Common Stock | A | 800 | $56.78 | 60,457 | D | M |
| 05 Nov, 2025 | Richard S Geary | Common Stock | D | 800 | $75.01 | 59,657 | D | S |
| 05 Nov, 2025 | Richard S Geary | Common Stock | A | 801 | $60.89 | 60,458 | D | M |
| 05 Nov, 2025 | Richard S Geary | Common Stock | D | 801 | $75.01 | 59,657 | D | S |