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Ionis Pharmaceut (IONS)
NASDAQ
$75.98+$0.08 (+0.11%)
Price as of Jun 23, 2026 4:15 PM EDT- $12.5BMarket Cap
- 101.46%1-Year Change
- BiotechnologyIndustry
Ionis Pharmaceut (IONS)
$75.98+$0.08 (+0.11%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
DLD ASSET MANAGEMENT, LP | 15.13% | 25.0M | +25.0M (+100.00%) | Sep 30, 2025 |
FMR LLC | 14.86% | 24.6M | +484,536 (+1.97%) | Mar 31, 2026 |
CAPITAL WORLD INVESTORS | 12.82% | 21.2M | +3.2M (+15.22%) | Mar 31, 2026 |
VANGUARD GROUP INC | 9.95% | 16.4M | -41,271 (-0.25%) | Dec 31, 2025 |
BLACKROCK FUNDING, INC. /DE | 7.06% | 11.7M | +852,525 (+7.31%) | Dec 31, 2024 |
BLACKROCK, INC. | 6.32% | 10.4M | -205,387 (-1.97%) | Mar 31, 2026 |
BLACKROCK INC. | 6.25% | 10.3M | +549,139 (+5.32%) | Jun 30, 2024 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
CALAMOS INVESTMENT TRUST/IL | 18.30% | 30.3M | 0 (0.00%) | Jan 31, 2026 |
COLUMBIA FUNDS SERIES TRUST | 9.56% | 15.8M | 0 (0.00%) | Jan 31, 2026 |
MAINSTAY FUNDS | 8.77% | 14.5M | 0 (0.00%) | Jan 31, 2026 |
FIDELITY MT VERNON STREET TRUST | 7.58% | 12.5M | -77,503 (-0.62%) | Feb 28, 2026 |
VANGUARD INDEX FUNDS | 7.53% | 12.4M | -174,058 (-1.40%) | Mar 31, 2026 |
MAINSTAY VP FUNDS TRUST | 5.04% | 8.3M | 0 (0.00%) | Mar 31, 2026 |
Virtus Investment Trust | 4.96% | 8.2M | +170,000 (+2.08%) | Mar 31, 2026 |
Current Ownership Distribution
- Institutions2.7B (61.62%)
- Mutual Funds1.7B (38.34%)
- Insiders1.6M (0.04%)
- Other0 (0.00%)
Insider Transactions
- 0.04% (1.6M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 17Number of InsiderSelling (last 12 months)
- $506.1MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Kordasiewicz Holly B. EVP, Chief Development Officer | Exempt | Jun 12, 2026 | $0.00 | 12,000 | $0.00 | 0 |
Kordasiewicz Holly B. EVP, Chief Development Officer | Exempt | Jun 12, 2026 | $0.00 | 19,895 | $0.00 | 0 |
Kordasiewicz Holly B. EVP, Chief Development Officer | Exempt | Jun 12, 2026 | $0.00 | 7,951 | $0.00 | 21,000 |
Kordasiewicz Holly B. EVP, Chief Development Officer | Exempt | Jun 12, 2026 | $0.00 | 21,000 | $0.00 | 0 |
Kordasiewicz Holly B. EVP, Chief Development Officer | Exempt | Jun 12, 2026 | $484,136.39 | 7,951 | $60.89 | 30,409 |
Kordasiewicz Holly B. EVP, Chief Development Officer | Exempt | Jun 12, 2026 | $1.3M | 21,000 | $60.89 | 51,409 |
Kordasiewicz Holly B. EVP, Chief Development Officer | Exempt | Jun 12, 2026 | $391,200.00 | 12,000 | $32.60 | 63,409 |
Kordasiewicz Holly B. EVP, Chief Development Officer | Exempt | Jun 12, 2026 | $1.1M | 19,895 | $56.78 | 83,304 |
Kordasiewicz Holly B. EVP, Chief Development Officer | Sell | Jun 12, 2026 | $3.0M | 41,004 | $73.09 | 42,300 |
Kordasiewicz Holly B. EVP, Chief Development Officer | Sell | Jun 12, 2026 | $1.5M | 19,842 | $74.05 | 22,458 |
KLEIN JOSEPH III | Exempt | Apr 01, 2026 | $0.00 | 12,000 | $0.00 | 0 |
KLEIN JOSEPH III | Exempt | Apr 01, 2026 | $0.00 | 10,321 | $0.00 | 0 |
KLEIN JOSEPH III | Exempt | Apr 01, 2026 | $456,720.00 | 12,000 | $38.06 | 23,014 |
KLEIN JOSEPH III | Exempt | Apr 01, 2026 | $423,986.68 | 10,321 | $41.08 | 33,335 |
KLEIN JOSEPH III | Sell | Apr 01, 2026 | $1.5M | 20,105 | $75.50 | 13,230 |
KLEIN JOSEPH III | Sell | Apr 01, 2026 | $168,314.06 | 2,216 | $75.95 | 11,014 |
Schneider Eugene EVP, Chf Clinical Develop Ofcr | Sell | Mar 19, 2026 | $412,486.36 | 5,812 | $70.97 | 63,890 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Sell | Mar 17, 2026 | $744,661.60 | 10,172 | $73.21 | 82,660 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Exempt | Mar 16, 2026 | $0.00 | 33,118 | $0.00 | 0 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Exempt | Mar 16, 2026 | $0.00 | 20,541 | $0.00 | 5,405 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Exempt | Mar 16, 2026 | $0.00 | 61,041 | $0.00 | 0 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Exempt | Mar 16, 2026 | $0.00 | 60,299 | $0.00 | 0 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Exempt | Mar 16, 2026 | $3.7M | 60,299 | $60.89 | 193,180 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Exempt | Mar 16, 2026 | $3.5M | 61,041 | $56.78 | 254,221 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Exempt | Mar 16, 2026 | $1.1M | 33,118 | $32.60 | 287,339 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Exempt | Mar 16, 2026 | $771,930.78 | 20,541 | $37.58 | 307,880 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Sell | Mar 16, 2026 | $14.9M | 205,608 | $72.38 | 102,272 |
HOUGEN ELIZABETH L EVP, Finance & CFO | Sell | Mar 16, 2026 | $686,901.60 | 9,440 | $72.77 | 92,832 |
Jenne Kyle EVP, Chf GL Pdt Str Ofcr | Exempt | Mar 10, 2026 | $0.00 | 4,675 | $0.00 | 14,025 |
Monia Brett P Chief Executive Officer | Exempt | Mar 10, 2026 | $0.00 | 34,103 | $0.00 | 0 |