21 insiders reported 371 Form 4 transactions for IONIS PHARMACEUTICALS INC (IONS) over the past 18 months (most recent 2026-07-31). Recent activity: Hayden Michael R (Director) Buy 5,000 shares, Hayden Michael R (Director) Buy 15,000 shares, BERTHELSEN SPENCER R (Director) Buy 5,220 shares, HERMAN JOAN E (Director) Buy 5,220 shares, BENNETT C FRANK (EVP, Chief Scientific Officer) Sell 5,536 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-31 | Hayden Michael R | Director | Buy | 5,000 | $258,000 |
| 2026-07-31 | Hayden Michael R | Director | Buy | 15,000 | $800,700 |
| 2026-07-17 | BERTHELSEN SPENCER R | Director | Buy | 5,220 | $0 |
| 2026-07-17 | HERMAN JOAN E | Director | Buy | 5,220 | $0 |
| 2026-07-09 | BENNETT C FRANK | EVP, Chief Scientific Officer | Sell | 5,536 | $462,693 |
| 2026-07-09 | Diaz Allene M. | Director | Buy | 10,111 | $476,329 |
| 2026-07-09 | Kordasiewicz Holly B. | EVP, Chief Development Officer | Sell | 362 | $30,517 |
| 2026-07-09 | BENNETT C FRANK | EVP, Chief Scientific Officer | Buy | 15,000 | $0 |
| 2026-07-09 | Diaz Allene M. | Director | Sell | 10,111 | $863,637 |
| 2026-07-09 | BENNETT C FRANK | EVP, Chief Scientific Officer | Sell | 15,000 | $1.3M |
| 2026-07-06 | KLEIN JOSEPH III | Director | Sell | 11,419 | $902,551 |
| 2026-07-06 | KLEIN JOSEPH III | Director | Sell | 99 | $7,866 |
| 2026-07-06 | KLEIN JOSEPH III | Director | Buy | 11,518 | $460,029 |
| 2026-06-30 | O'NEIL PATRICK R. | EVP CLO & General Counsel | Sell | 3,069 | $245,520 |
| 2026-06-30 | Schneider Eugene | EVP, Chf Clinical Develop Ofcr | Buy | 26,000 | $1.6M |
| 2026-06-30 | Baroldi Joseph | EVP, Chief Business Officer | Buy | 1,769 | $57,669 |
| 2026-06-30 | Schneider Eugene | EVP, Chf Clinical Develop Ofcr | Sell | 26,000 | $2.1M |
| 2026-06-30 | Baroldi Joseph | EVP, Chief Business Officer | Sell | 5,635 | $451,699 |
| 2026-06-30 | Baroldi Joseph | EVP, Chief Business Officer | Buy | 3,866 | $219,511 |
| 2026-06-26 | Monia Brett P | Chief Executive Officer | Buy | 50,000 | $2.8M |
| 2026-06-26 | Monia Brett P | Chief Executive Officer | Buy | 14,565 | $474,819 |
| 2026-06-26 | Swayze Eric | EVP Research | Sell | 10,602 | $839,492 |
| 2026-06-26 | Monia Brett P | Chief Executive Officer | Sell | 14,565 | $1.1M |
| 2026-06-26 | Monia Brett P | Chief Executive Officer | Buy | 21,072 | $686,947 |
| 2026-06-26 | Monia Brett P | Chief Executive Officer | Sell | 21,072 | $1.7M |
Source: SEC Form 4 filings · as of 2026-07-31