IONIS PHARMACEUTICALS INC (IONS) — real insider trading activity disclosed to the SEC, tracked automatically as new Form 4 filings are reported. Most recent: Hayden Michael R — 2 open-market purchases between 2026-07-30 and 2026-07-31, totaling $1,058,700.
Transactions disclosed by company insiders to the SEC on Form 4, most recent first.
| Insider | Role | Date | Shares | Value |
|---|---|---|---|---|
| Hayden Michael R | Director | 2026-07-31 | 5,000 | $258,000 |
| Hayden Michael R | Director | 2026-07-30 | 15,000 | $800,700 |
Position changes disclosed in SEC Form 13F filings. These report a quarterly snapshot, not exact trade dates.
| Fund | Change | Quarter |
|---|---|---|
| Capital International Investors | Capital International Investors opened a new position worth $65,316,248. | 2026-06-30 |
| Sixth Street Partners Management Company, L.P. | Sixth Street Partners Management Company, L.P. opened a new position worth $127,260,529. | 2026-06-30 |
| RENAISSANCE TECHNOLOGIES LLC | RENAISSANCE TECHNOLOGIES LLC increased this position by 93% ($22,943,674 -> $44,355,936). | 2026-06-30 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ increased this position by 16948% ($301,336 -> $51,370,722). | 2026-06-30 |
| Capital World Investors | Capital World Investors increased this position by 8% ($1,590,884,448 -> $1,718,152,930). | 2026-06-30 |
| Artisan Partners Limited Partnership | Artisan Partners Limited Partnership increased this position by 35% ($154,558,340 -> $209,327,536). | 2026-06-30 |
| Davern Capital Partners, LP | Davern Capital Partners, LP increased this position by 118% ($29,052,546 -> $63,329,637). | 2026-06-30 |
| VANGUARD CAPITAL MANAGEMENT LLC | VANGUARD CAPITAL MANAGEMENT LLC increased this position by 7% ($534,515,400 -> $571,799,597). | 2026-06-30 |
Largest reported positions as of 2026-06-30.
| Fund | Value | Shares |
|---|---|---|
| Capital World Investors | $1,718,152,930 | 21,669,226 |
| FMR LLC | $1,062,239,646 | 13,396,893 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $623,182,054 | 7,859,529 |
| VANGUARD CAPITAL MANAGEMENT LLC | $571,799,597 | 7,211,497 |
| WELLINGTON MANAGEMENT GROUP LLP | $558,240,214 | 7,289,000 |
| TWO SIGMA INVESTMENTS, LP | $495,748,197 | 6,252,342 |
| GEODE CAPITAL MANAGEMENT, LLC | $260,920,005 | 3,157,327 |
| Artisan Partners Limited Partnership | $209,327,536 | 2,640,024 |
| Deep Track Capital, LP | $174,438,000 | 2,200,000 |
| BAKER BROS. ADVISORS LP | $162,364,274 | 2,047,727 |
Data compiled from public SEC filings. This is informational reporting, not investment advice.
A fresh Form 4 filing shows Ionis Pharmaceuticals Inc (NASDAQ: IONS) director Michael R. Hayden purchased 5,000 shares of the company on the open market on July 31, 2026, paying $51.60 per share for a total outlay of $258,000. Following the purchase, Hayden’s stake stood at 24,000 shares, held indirectly through a trust or similar … Read more