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Ionis Pharmaceut (IONS)
NASDAQ
$56.47-$0.28 (-0.50%)
Price as of Jul 14, 2026 4:29 AM EDT- $9.6BMarket Cap
- 33.37%1-Year Change
- BiotechnologyIndustry
Ionis Pharmaceut (IONS)
$56.47-$0.28 (-0.50%)
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%) | Apr 30, 2026 |
COLUMBIA FUNDS SERIES TRUST | 9.56% | 15.8M | 0 (0.00%) | Apr 30, 2026 |
MAINSTAY FUNDS | 8.77% | 14.5M | 0 (0.00%) | Apr 30, 2026 |
SPDR SERIES TRUST | 7.66% | 12.7M | 0 (0.00%) | Apr 30, 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 |
Current Ownership Distribution
- Institutions2.7B (59.92%)
- Mutual Funds1.8B (40.04%)
- Insiders1.7M (0.04%)
- Other0 (0.00%)
Insider Transactions
- 0.04% (1.7M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 17Number of InsiderSelling (last 12 months)
- $509.4MAmount 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 | Sell | Jul 07, 2026 | $30,516.60 | 362 | $84.30 | 22,096 |
Hayden Michael R | Award | Jul 01, 2026 | $0.00 | 5,369 | $0.00 | 5,369 |
Diaz Allene M. | Award | Jul 01, 2026 | $0.00 | 5,369 | $0.00 | 5,369 |
Hayden Michael R | Award | Jul 01, 2026 | $0.00 | 2,301 | $0.00 | 12,198 |
YANG MICHAEL J. | Award | Jul 01, 2026 | $0.00 | 5,369 | $0.00 | 5,369 |
LOSCALZO JOSEPH | Award | Jul 01, 2026 | $0.00 | 5,369 | $0.00 | 5,369 |
YANG MICHAEL J. | Award | Jul 01, 2026 | $0.00 | 2,301 | $0.00 | 9,451 |
Diaz Allene M. | Award | Jul 01, 2026 | $0.00 | 2,301 | $0.00 | 7,521 |
LOSCALZO JOSEPH | Award | Jul 01, 2026 | $0.00 | 2,301 | $0.00 | 7,521 |
O'NEIL PATRICK R. EVP CLO & General Counsel | Sell | Jun 26, 2026 | $245,520.00 | 3,069 | $80.00 | 61,470 |
Baroldi Joseph EVP, Chief Business Officer | Exempt | Jun 26, 2026 | $0.00 | 1,769 | $0.00 | 0 |
Schneider Eugene EVP, Chf Clinical Develop Ofcr | Exempt | Jun 26, 2026 | $0.00 | 26,000 | $0.00 | 26,000 |
Baroldi Joseph EVP, Chief Business Officer | Exempt | Jun 26, 2026 | $0.00 | 3,866 | $0.00 | 0 |
Schneider Eugene EVP, Chf Clinical Develop Ofcr | Exempt | Jun 26, 2026 | $1.6M | 26,000 | $60.89 | 103,114 |
Baroldi Joseph EVP, Chief Business Officer | Exempt | Jun 26, 2026 | $219,511.48 | 3,866 | $56.78 | 8,535 |
Schneider Eugene EVP, Chf Clinical Develop Ofcr | Sell | Jun 26, 2026 | $2.1M | 26,000 | $81.05 | 77,114 |
Baroldi Joseph EVP, Chief Business Officer | Exempt | Jun 26, 2026 | $57,669.40 | 1,769 | $32.60 | 10,304 |
Baroldi Joseph EVP, Chief Business Officer | Sell | Jun 26, 2026 | $451,698.78 | 5,635 | $80.16 | 4,669 |
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 |