🕵️ Ionis Pharmaceuticals Inc ($IONS)
SEC insider & ownership activity, last 12 months · CIK 874015 · every row links its SEC filing
Over the last 12 months insiders sold $192.5M with no open-market buying against it. Brett P. Monia sold $42.8M (Jul–Jun). Capital World Investors added 11.1% → 12.8%. No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 19 sellers, $192.5M (185 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Brett P. Monia | 0 | – | 18 | $42.8M | Jun 26, 2026 |
| Elizabeth L. Hougen | 0 | – | 6 | $21.1M | Mar 17, 2026 |
| Bennett C Frank | 0 | – | 14 | $19.8M | Jul 7, 2026 |
| Patrick R. O'Neil | 0 | – | 16 | $16.0M | Jun 26, 2026 |
| Richard S. Geary | 0 | – | 14 | $14.3M | Nov 6, 2025 |
| Klein Joseph III | 0 | – | 14 | $9.4M | Jul 1, 2026 |
| Shannon L. Devers | 0 | – | 15 | $8.9M | Apr 2, 2026 |
| Joseph Wender | 0 | – | 13 | $8.7M | Dec 1, 2025 |
| Swayze Eric | 0 | – | 14 | $8.1M | Jun 25, 2026 |
| Loscalzo Joseph | 0 | – | 6 | $8.0M | May 4, 2026 |
| Baroldi Joseph | 0 | – | 17 | $6.4M | Jun 26, 2026 |
| Schneider Eugene | 0 | – | 7 | $5.3M | Jun 26, 2026 |
| Allene M. Diaz | 0 | – | 5 | $5.3M | Jul 7, 2026 |
| Holly B. Kordasiewicz | 0 | – | 4 | $4.8M | Jul 7, 2026 |
| Birchler Brian | 0 | – | 6 | $3.6M | Apr 16, 2026 |
| Jenne Kyle | 0 | – | 4 | $3.3M | Apr 16, 2026 |
| Joan E. Herman | 0 | – | 2 | $3.2M | Nov 19, 2025 |
| Parshall B Lynne | 0 | – | 8 | $2.4M | Apr 15, 2026 |
| Spencer R. Berthelsen | 0 | – | 2 | $1.2M | Jun 15, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Capital World Investors | 12.8% | 13G | May 14, 2026 | filing ↗ | |
| Blackrock, Inc. | 5.7% | 13G | Apr 17, 2025 | filing ↗ | |
| Vanguard Capital Management | 5.0% | 13G | Apr 30, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Allene M. Diaz | $864K | Jul 7, 2026 | filing ↗ |
| Holly B. Kordasiewicz | $108K | Jul 7, 2026 | filing ↗ |
| Bennett C Frank | $5.7M | Jul 7, 2026 | filing ↗ |
| Klein Joseph III | $910K | Jul 1, 2026 | filing ↗ |
| Baroldi Mariana | $452K | Jun 26, 2026 | filing ↗ |
| Patrick R. O'Neil | $246K | Jun 26, 2026 | filing ↗ |
| Schneider Eugene | $3.9M | Jun 26, 2026 | filing ↗ |
| Swayze Eric | $839K | Jun 25, 2026 | filing ↗ |
| Spencer R. Berthelsen | $588K | Jun 15, 2026 | filing ↗ |
| Holly B. Kordasiewicz | $4.5M | Jun 12, 2026 | filing ↗ |
| Spencer R. Berthelsen | $605K | Jun 1, 2026 | filing ↗ |
| Brett P. Monia | $7.8M | May 13, 2026 | filing ↗ |
| Loscalzo Joseph | $4.3M | May 4, 2026 | filing ↗ |
| Baroldi Joseph | $117K | Apr 28, 2026 | filing ↗ |
| Jenne Kyle | $370K | Apr 16, 2026 | filing ↗ |
| Birchler Brian | $73K | Apr 16, 2026 | filing ↗ |
| Baroldi Joseph | $424K | Apr 16, 2026 | filing ↗ |
| Schneider Eugene | $412K | Mar 19, 2026 | filing ↗ |
| Elizabeth L. Hougen | $16.3M | Mar 16, 2026 | filing ↗ |
| Jenne Kyle | $4.4M | Mar 10, 2026 | filing ↗ |
| Patrick R. O'Neil | $995K | Mar 9, 2026 | filing ↗ |
| Allene M. Diaz | $5.5M | Mar 3, 2026 | filing ↗ |
| Bennett C Frank | $7.1M | Mar 3, 2026 | filing ↗ |
| Loscalzo Joseph | $1.9M | Mar 3, 2026 | filing ↗ |
| Baroldi Mariana | $656K | Mar 3, 2026 | filing ↗ |
| Baroldi Joseph | $325K | Mar 3, 2026 | filing ↗ |
| Klein Joseph III | $5.0M | Mar 3, 2026 | filing ↗ |
| Shannon L. Devers | $3.1M | Mar 3, 2026 | filing ↗ |
| Swayze Eric | $1.3M | Feb 13, 2026 | filing ↗ |
| Parshall B Lynne | $827K | Feb 11, 2026 | filing ↗ |
| Brett P. Monia | $24.8M | Feb 6, 2026 | filing ↗ |
| Baroldi Joseph | $440K | Jan 30, 2026 | filing ↗ |
| Birchler Brian | $512K | Jan 30, 2026 | filing ↗ |
| Bennett C Frank | $488K | Jan 30, 2026 | filing ↗ |
| Elizabeth L. Hougen | $580K | Jan 30, 2026 | filing ↗ |
| Brett P. Monia | $5.2M | Jan 30, 2026 | filing ↗ |
| Patrick R. O'Neil | $513K | Jan 30, 2026 | filing ↗ |
| Swayze Eric | $513K | Jan 30, 2026 | filing ↗ |
| Schneider Eugene | $513K | Jan 30, 2026 | filing ↗ |
| Shannon L. Devers | $323K | Jan 22, 2026 | filing ↗ |
| Baroldi Mariana | $94K | Jan 16, 2026 | filing ↗ |
| Swayze Eric | $754K | Jan 16, 2026 | filing ↗ |
| Baroldi Joseph | $560K | Jan 16, 2026 | filing ↗ |
| Bennett C Frank | $684K | Jan 16, 2026 | filing ↗ |
| Birchler Brian | $646K | Jan 16, 2026 | filing ↗ |
| Elizabeth L. Hougen | $985K | Jan 16, 2026 | filing ↗ |
| Brett P. Monia | $3.4M | Jan 16, 2026 | filing ↗ |
| Patrick R. O'Neil | $701K | Jan 16, 2026 | filing ↗ |
| Schneider Eugene | $709K | Jan 16, 2026 | filing ↗ |
| Shannon L. Devers | $637K | Jan 16, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 29, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 9, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 9, 2026 | filing ↗ |
| Other events (8.01) | Jul 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 9, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 24, 2026 | filing ↗ |
| Other events (8.01) | Jun 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 24, 2026 | filing ↗ |
| Other events (8.01) | Jun 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 12, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 4, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 4, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 4, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 28, 2026 | filing ↗ |
| Other events (8.01) | May 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 28, 2026 | filing ↗ |
| Earnings (2.02) | Apr 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 29, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 21, 2026 | filing ↗ |
| Other events (8.01) | Apr 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 21, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 3, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 3, 2026 | filing ↗ |
| Earnings (2.02) | Feb 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 25, 2026 | filing ↗ |
| Earnings (2.02) | Jan 12, 2026 | filing ↗ |