Ionis Pharmaceuticals Ownership | Who Owns Ionis Pharmaceuticals?
Ionis Pharmaceuticals Ownership Summary
Ionis Pharmaceuticals is owned by 8.82% institutional investors, 0.84% insiders, and 90.34% retail investors. Fmr is the largest institutional shareholder, holding 15.27% of IONS shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 6.83% of its assets in Ionis Pharmaceuticals shares.
IONS Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Ionis Pharmaceuticals | 8.82% | 0.84% | 90.34% |
| Sector | Healthcare Stocks | 279.18% | 10.62% | -189.80% |
| Industry | Biotech Stocks | 63.96% | 10.74% | 25.30% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Fmr | 22.69M | 15.27% | $793.22M |
| Vanguard group | 16.47M | 11.09% | $575.88M |
| T. rowe price investment management | 14.17M | 9.54% | $495.36M |
| Blackrock funding, inc. /de | 11.67M | 7.85% | $407.83M |
| Capital world investors | 11.47M | 7.72% | $400.83M |
| Blackrock | 10.32M | 7.09% | $491.90M |
| Wellington management group llp | 8.67M | 5.84% | $303.18M |
| Bellevue group | 7.87M | 5.30% | $275.09M |
| State street | 4.19M | 2.88% | $199.72M |
| Deep track capital, lp | 4.56M | 2.88% | $137.70M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Tweedy, browne | 2.98M | 7.98% | $90.01M |
| Bellevue group | 7.87M | 5.30% | $275.09M |
| Deep track capital, lp | 4.56M | 4.46% | $137.70M |
| Great point partners | 250.00K | 4.00% | $7.54M |
| Exome asset management | 135.62K | 3.64% | $4.09M |
| Orion investment | 216.00K | 3.01% | $7.55M |
| Privium fund management b.v. | 247.27K | 2.85% | $11.16M |
| Sector gamma as | 235.84K | 2.83% | $8.25M |
| Bvf inc/il | 1.91M | 2.35% | $57.73M |
| Sicart associates | 185.82K | 2.32% | $6.50M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Capital world investors | 11.47M | 0.06% | 3.64M |
| Deep track capital, lp | 4.56M | 4.46% | 2.63M |
| Bvf inc/il | 1.91M | 2.35% | 1.91M |
| Ubs group | 1.92M | 0.01% | 1.75M |
| Norges bank | 1.71M | 0.01% | 1.71M |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Artisan partners limited partnership | 252.63K | 0.01% | -1.99M |
| Clearbridge investments | - | - | -1.62M |
| Marshall wace, llp | 812.31K | 0.03% | -1.11M |
| Balyasny asset management | - | - | -1.08M |
| Logos global management lp | - | - | -750.00K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 1.71M | 0.01% | 1.71M | $59.95M |
| Camber capital management lp | 625.00K | 0.51% | 625.00K | $21.85M |
| Integral health asset management | 250.00K | 1.13% | 250.00K | $11.91M |
| Aquatic capital management | 230.02K | 0.22% | 230.02K | $8.04M |
| Susquehanna fundamental investments | 213.01K | 0.11% | 213.01K | $7.45M |
Sold Out
| Holder | Change |
|---|---|
| Activest wealth management | -1.00 |
| Rothschild investment | -5.00 |
| Voisard asset management group | -10.00 |
| Central trust | -15.00 |
| Thurston, springer, miller, herd & titak | -20.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2025 | 15 | -96.08% | 14,001,670 | -91.30% | 8 | 0.08% | 6 | -96.65% | 6 | -94.92% |
| Dec 31, 2024 | 235 | -38.48% | 100,254,792 | -35.75% | 67 | 0.61% | 111 | -39.34% | 73 | -31.78% |
| Sep 30, 2024 | 378 | 0.27% | 156,005,896 | 8.92% | 104 | 1.08% | 182 | 3.41% | 106 | -17.83% |
| Jun 30, 2024 | 375 | -2.60% | 143,227,487 | 1.66% | 98 | 1.02% | 176 | 2.92% | 127 | 0.79% |
| Mar 31, 2024 | 385 | 1.05% | 140,888,836 | -0.88% | 98 | 1.00% | 171 | -9.04% | 126 | 5.88% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Fidelity Growth Compy Commingled Pl S | 10.87M | 6.83% | 50.80K |
| Fidelity Growth Compy Commingled Pl O | 9.71M | 6.16% | 90.97K |
| BB Biotech AG Ord | 7.85M | 4.97% | - |
| Fidelity Growth Company Fund | 7.62M | 4.79% | 26.30K |
| Vanguard Health Care Inv | 5.73M | 3.60% | - |
| T. Rowe Price Mid-Cap Growth | 5.69M | 3.58% | -6.90K |
| T. Rowe Price US Mid-Cap Growth Equity | 5.69M | 3.58% | 416.00K |
| Vanguard Total Stock Mkt Idx Inv | 4.84M | 3.04% | 17.14K |
| Vanguard US Total Market Shares ETF | 4.50M | 2.83% | 256.36K |
| American Funds SMALLCAP World A | 4.46M | 2.80% | 400.00K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 01, 2025 | Hayden Michael R | - | Buy | $477.90K |
| Apr 16, 2025 | Birchler Brian | EVP, Corp and Development Ops | Sell | $19.29K |
| Apr 16, 2025 | Jenne Kyle | EVP, Chf GL Pdt Str Ofcr | Sell | $85.53K |
| Apr 16, 2025 | Baroldi Joseph | EVP, Chief Business Officer | Sell | $111.56K |
| Mar 11, 2025 | Monia Brett P | Chief Executive Officer | Sell | $4.52K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q2 | 1 | 3 |
| 2025 Q1 | - | 23 |
| 2024 Q4 | 2 | 4 |
| 2024 Q3 | - | 6 |
| 2024 Q2 | - | 9 |
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