IONIS PHARMACEUTICALS INC hedge fund holdings
IONSNASDAQ$43.54-0.46 (-1.05%)as of Oct 2, 2026
Every quarter, large institutional investment managers with over $100M in U.S.-listed assets under management disclose their U.S. equity holdings through 13F filings. Read together, those filings show which businesses professional capital is moving into and out of.
Price vs funds buying and selling
IONS · close · 13FReported Aug 14, 2026Price vs funds buying and selling data
Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (-36.3%). 0 fund reports plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Funds buying · new + increased
Funds selling · reduced + closed
Net buyers vs sellers
Buying = new + increased; selling = reduced + closed. Counts exclude position changes under 5% of the fund's holding last quarter.Price and fund activity data
| Quarter | Funds buying | Funds selling | Bought | Sold | Filers | Reported |
|---|---|---|---|---|---|---|
| Q2 2025 | 143 | 119 | $605M | $519M | 336 | Aug 14, 2025 |
| Q3 2025 | 179 | 111 | $1.31B | $1.34B | 413 | Nov 14, 2025 |
| Q4 2025 | 189 | 141 | $1.74B | $1.3B | 461 | Feb 14, 2026 |
| Q1 2026 | 172 | 156 | $1.52B | $1.77B | 464 | May 15, 2026 |
| Q2 2026 | 182 | 145 | $1.4B | $878M | 474 | Aug 14, 2026 |
Quarterly action breakdown
Q2 2026
474 filersNew position
52$141M+1.78M sh
Increased
130$1.26B+15.9M sh
Reduced
107-$801M-10.1M sh
Out / sold
38-$77.8M-981K sh
Last 4 quarters · free
Reported Aug 14, 2026
| Fund | Action | Change in dollar | Value | % of portfolio | Reported |
|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | Reduce 35.71% | -$174M | $314M | 0.21% | Aug 14, 2026 |
| Wellington Management Group LLP | Added 19.71% | +$99.9M | $607M | 0.10% | Aug 14, 2026 |
| Bellevue Group AG | Reduce 46.54% | -$67.1M | $77.1M | 1.62% | Aug 14, 2026 |
| Capital International Investors | New Buy | +$65.3M | $65.3M | 0.01% | Aug 12, 2026 |
| Polar Capital Holdings Plc | Added 75.29% | +$49.5M | $115M | 0.27% | Aug 14, 2026 |
| Summit Partners Public Asset Management, LLC | Reduce 43.93% | -$48.9M | $62.4M | 1.10% | Aug 14, 2026 |
| Artisan Partners Limited Partnership | Added 28.26% | +$46.1M | $209M | 0.33% | Aug 13, 2026 |
| Nomura Asset Management International Inc. | Added 65.60% | +$40.8M | $103M | 0.15% | Aug 14, 2026 |
| Capital World Investors | Added 2.28% | +$38.3M | $1.72B | 0.20% | Aug 12, 2026 |
| Davern Capital Partners, LP | Added 106.44% | +$32.7M | $63.3M | 10.80% | Aug 13, 2026 |
| Freestone Grove Partners LP | New Buy | +$27M | $27M | 0.17% | Aug 14, 2026 |
| Nomura Holdings Inc | Added 252.55% | +$22.8M | $31.9M | 0.04% | Aug 14, 2026 |
| Carmignac Gestion | Added 505.66% | +$21.2M | $25.5M | 0.33% | Aug 13, 2026 |
| Deep Track Capital, LP | Added 12.82% | +$19.8M | $174M | 2.54% | Aug 14, 2026 |
| Zurich Insurance Group Ltd | Sell 100% | -$18M | $0 | 0.00% | Aug 14, 2026 |
| J. Goldman & Co LP | Reduce 82.84% | -$15.5M | $3.2M | 0.08% | Aug 14, 2026 |
| Eagle Health Investments LP | New Buy | +$15.4M | $15.4M | 2.56% | Aug 10, 2026 |
| Capital Fund Management S.A. | Added 131.75% | +$14.9M | $26.1M | 0.12% | Aug 13, 2026 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Reduce 19.10% | -$13.7M | $58.2M | 0.06% | Aug 13, 2026 |
| Handelsbanken Fonder AB | Added 79.15% | +$13.4M | $30.4M | 0.09% | Jul 10, 2026 |
| Aberdeen Group plc | Added 143.67% | +$13M | $22M | 0.03% | Jul 31, 2026 |
| Pictet Asset Management Holding SA | Added 11.29% | +$12.9M | $127M | 0.12% | Jul 30, 2026 |
| Ikarian Capital, LLC | Sell 100% | -$9.54M | $0 | 0.00% | Aug 14, 2026 |
| Empowered Funds, LLC | Added 116.35% | +$9.51M | $17.7M | 0.09% | Aug 17, 2026 |
| Integral Health Asset Management, LLC | Sell 100% | -$9.39M | $0 | 0.00% | Aug 14, 2026 |
| Polymer Capital Management (HK) LTD | Added 190.68% | +$9.25M | $14.1M | 0.71% | Aug 13, 2026 |
| Groupama Asset Managment | Added 13.65% | +$9.03M | $75.2M | 0.95% | Aug 14, 2026 |
| Atle Fund Management AB | Added 391.99% | +$8.66M | $10.9M | 2.93% | Jul 24, 2026 |
| Adage Capital Partners GP, L.L.C. | Added 200.00% | +$7.93M | $11.9M | 0.02% | Aug 14, 2026 |
| Susquehanna Portfolio Strategies, LLC | Reduce 95.90% | -$7.3M | $312K | 0.01% | Aug 14, 2026 |
| Public Employees Retirement Association of Colorado | Added 481.11% | +$5.95M | $7.18M | 0.02% | Aug 11, 2026 |
| CSS LLC | Added 92.54% | +$5.8M | $12.1M | 0.47% | Aug 14, 2026 |
| Lisanti Capital Growth, LLC | Sell 100% | -$5.68M | $0 | 0.00% | Aug 10, 2026 |
| Swedbank AB | Added 196.61% | +$5.03M | $7.59M | 0.01% | Jul 15, 2026 |
| Perceptive Advisors LLC | Added 12.30% | +$4.92M | $44.9M | 0.67% | Aug 14, 2026 |
| CenterBook Partners LP | Reduce 40.84% | -$4.89M | $7.08M | 0.35% | Aug 11, 2026 |
| Schroder Investment Management Group | New Buy | +$4.75M | $4.75M | 0.00% | Aug 13, 2026 |
| Sovran Advisors, LLC | New Buy | +$4.7M | $4.7M | 0.35% | Jul 30, 2026 |
| Tetragon Partners GP Ltd | Added 132.67% | +$4.39M | $7.7M | 1.21% | Aug 13, 2026 |
| Thrivent Financial for Lutherans | Added 529.82% | +$4.19M | $4.98M | 0.01% | Aug 14, 2026 |
| Great Lakes Advisors, LLC | Reduce 43.73% | -$4.12M | $5.31M | 0.04% | Aug 10, 2026 |
| Fred Alger Management, LLC | Added 177.42% | +$4M | $6.26M | 0.02% | Aug 14, 2026 |
| Campbell & CO Investment Adviser LLC | Added 1500.52% | +$3.69M | $3.94M | 0.21% | Aug 3, 2026 |
| DAVENPORT & Co LLC | Added 19.19% | +$3.63M | $22.5M | 0.11% | Jul 13, 2026 |
| West Michigan Advisors, LLC | Sell 100% | -$3.35M | $0 | 0.00% | Aug 21, 2026 |
| First Trust Advisors LP | Reduce 8.79% | -$3.26M | $33.9M | 0.02% | Aug 11, 2026 |
| E Fund Management Co., Ltd. | Reduce 88.07% | -$3.26M | $442K | 0.01% | Aug 11, 2026 |
| Ensign Peak Advisors, Inc | Reduce 80.18% | -$2.92M | $723K | 0.00% | Aug 14, 2026 |
| Amova Asset Management Americas, Inc. | Reduce 41.67% | -$2.7M | $3.78M | 0.05% | Aug 13, 2026 |
| Sumitomo Mitsui Trust Group, Inc. | Reduce 41.58% | -$2.7M | $3.79M | 0.00% | Jul 30, 2026 |
| Rhenman & Partners Asset Management AB | Reduce 35.52% | -$2.62M | $4.75M | 0.45% | Aug 13, 2026 |
| Eversept Partners, LP | Added 5.15% | +$2.58M | $52.7M | 2.73% | Aug 14, 2026 |
| Tocqueville Asset Management L.P. | Added 14.59% | +$2.54M | $19.9M | 0.26% | Aug 10, 2026 |
| Ethic Inc. | New Buy | +$2.51M | $2.51M | 0.03% | Jul 29, 2026 |
| Bamco Inc | Reduce 68.89% | -$2.46M | $1.11M | 0.00% | Aug 14, 2026 |
| Privium Fund Management B.V. | Added 10.31% | +$2.37M | $25.4M | 4.66% | Aug 7, 2026 |
| Van Eck Associates Corp | Added 83.73% | +$2.29M | $5.03M | 0.00% | Aug 14, 2026 |
| EFG International AG | Added 30.67% | +$2.29M | $9.74M | 0.18% | Aug 14, 2026 |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | Reduce 68.35% | -$2.11M | $978K | 0.21% | Aug 13, 2026 |
| BI Asset Management Fondsmaeglerselskab A/S | New Buy | +$2.04M | $2.04M | 0.02% | Aug 10, 2026 |
| Florida Financial Advisors, LLC | Sell 100% | -$1.94M | $0 | 0.00% | Aug 10, 2026 |
| Edmond de Rothschild Holding S.A. | Reduce 17.40% | -$1.89M | $8.99M | 0.12% | Aug 10, 2026 |
| Rafferty Asset Management, LLC | Reduce 37.57% | -$1.8M | $2.99M | 0.01% | Aug 14, 2026 |
| Gotham Asset Management, LLC | Added 22.52% | +$1.77M | $9.61M | 0.02% | Aug 14, 2026 |
| Exome Asset Management LLC | Reduce 19.89% | -$1.74M | $6.99M | 4.31% | Aug 14, 2026 |
| Qsemble Capital Management, LP | Reduce 84.91% | -$1.73M | $308K | 0.04% | Aug 3, 2026 |
| Stanley-Laman Group, Ltd. | Added 54.79% | +$1.71M | $4.82M | 0.49% | Aug 5, 2026 |
| Worldquant Millennium Advisors LLC | Added 75.39% | +$1.67M | $3.88M | 0.01% | Aug 14, 2026 |
| Natixis Advisors, LLC | Added 88.56% | +$1.67M | $3.55M | 0.00% | Aug 14, 2026 |
| KBC Group NV | Added 69.22% | +$1.66M | $4.05M | 0.01% | Aug 5, 2026 |
| Jefferies Financial Group Inc. | Reduce 34.54% | -$1.62M | $3.07M | 0.02% | Aug 17, 2026 |
| Voleon Capital Management LP | Reduce 87.58% | -$1.6M | $227K | 0.00% | Aug 14, 2026 |
| Sector Gamma As | Added 11.80% | +$1.59M | $15M | 3.26% | Aug 12, 2026 |
| Boone Capital Management LLC | Added 3.89% | +$1.54M | $41.2M | 9.64% | Aug 14, 2026 |
| Readystate Asset Management LP | Sell 100% | -$1.53M | $0 | 0.00% | Aug 14, 2026 |
| Canada Pension Plan Investment Board | Added 136.17% | +$1.52M | $2.64M | 0.00% | Aug 14, 2026 |
| DCF Advisers, LLC | Reduce 33.04% | -$1.47M | $2.97M | 0.53% | Aug 10, 2026 |
| VANGUARD ASSET MANAGEMENT, Ltd | Added 12.79% | +$1.39M | $12.3M | 0.01% | Aug 13, 2026 |
| Voloridge Investment Management, LLC | Reduce 2.59% | -$1.38M | $52M | 0.22% | Aug 14, 2026 |
| Graham Capital Management, L.P. | New Buy | +$1.33M | $1.33M | 0.02% | Aug 14, 2026 |
| Pinnacle Associates Ltd | Reduce 3.83% | -$1.32M | $33.3M | 0.36% | Aug 3, 2026 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | Reduce 9.76% | -$1.3M | $12M | 0.01% | Aug 14, 2026 |
| BIT Capital GmbH | New Buy | +$1.29M | $1.29M | 0.04% | Aug 12, 2026 |
| Tidal Investments LLC | Added 42.83% | +$1.17M | $3.9M | 0.01% | Aug 13, 2026 |
| Massachusetts Financial Services Co | Reduce 2.15% | -$1.13M | $51.7M | 0.02% | Aug 3, 2026 |
| Braidwell LP | Reduce 10.77% | -$1.12M | $9.26M | 0.34% | Aug 14, 2026 |
| Highland Capital Management, LLC | Sell 100% | -$963K | $0 | 0.00% | Jul 21, 2026 |
| ARK Investment Management LLC | Added 4.18% | +$956K | $23.8M | 0.15% | Aug 14, 2026 |
| Edgestream Partners, L.P. | Reduce 17.05% | -$924K | $4.5M | 0.13% | Aug 11, 2026 |
| Militia Capital Management LLC | New Buy | +$904K | $904K | 0.03% | Aug 12, 2026 |
| M&G PLC | Reduce 78.58% | -$895K | $244K | 0.00% | Aug 6, 2026 |
| Evolve Private Wealth, LLC | New Buy | +$845K | $845K | 0.05% | Aug 12, 2026 |
| Capstone Capital Management Ltd | Sell 100% | -$832K | $0 | 0.00% | Jul 20, 2026 |
| Calamos Advisors LLC | Added 48.42% | +$759K | $2.33M | 0.01% | Jul 31, 2026 |
| Quantinno Capital Management LP | Added 16.96% | +$746K | $5.15M | 0.01% | Aug 13, 2026 |
| NewEdge Wealth, LLC | New Buy | +$712K | $712K | 0.01% | Aug 10, 2026 |
| DeepCurrents Investment Group LLC | Added 32.05% | +$697K | $2.87M | 0.09% | Aug 14, 2026 |
| iA Global Asset Management Inc. | New Buy | +$686K | $686K | 0.01% | Jul 29, 2026 |
| Aigen Investment Management, LP | Sell 100% | -$660K | $0 | 0.00% | Aug 14, 2026 |
| Inspire Investing, LLC | New Buy | +$644K | $644K | 0.03% | Aug 12, 2026 |