IONIS PHARMACEUTICALS INC
CUSIP 462222AF7
Ionis Pharmaceuticals Inc has 1 institutional holders in Filings Flow’s 13F database, together reporting 527.71M shares worth $767M as of Q1 2026. The largest reported holders are Voya Investment Management LLC, Deerfield Management Company, L.P., and Citadel Advisors LLC.
Institutional Holders
1
Q1 2026
Reported Value
$8M
Ticker
unmapped
private placement or foreign
Quarters Tracked
3
Ownership Trend
Institutional holders
Total reported value
Holders
Mixed quarters
| Manager | % of Portfolio | Value | Shares | Quarter |
|---|---|---|---|---|
| DLD Asset Management, LP$1.1B AUM | 7.56% | $83M | 55.00M | Q1 2026OLDER |
| CAMDEN ASSET MANAGEMENT L P /CA$2.9B AUM | 1.93% | $76M | 48.07M | Q4 2025OLDER |
| Ares Systematic Credit Ltd$123M AUM | 1.68% | $2M | 1.30M | Q1 2026OLDER |
| DEERFIELD MANAGEMENT COMPANY, L.P.$8.5B AUM | 1.07% | $91M | 60.00M | Q1 2026OLDER |
| SHENKMAN CAPITAL MANAGEMENT INC$831M AUM | 0.70% | $7M | 5.06M | Q3 2025OLDER |
| MACKAY SHIELDS LLC$2.7B AUM | 0.58% | $16M | 10.41M | Q1 2026OLDER |
| Sonora Investment Management Group, LLC$1.4B AUM | 0.51% | $7M | 5.28M | Q3 2025OLDER |
| TENOR CAPITAL MANAGEMENT Co., L.P.$6.5B AUM | 0.51% | $33M | 21.71M | Q1 2026OLDER |
| ARISTEIA CAPITAL, L.L.C.$4.8B AUM | 0.31% | $15M | 10.00M | Q1 2026OLDER |
| SSI INVESTMENT MANAGEMENT LLC$1.4B AUM | 0.24% | $4M | 2.34M | Q1 2026OLDER |
| CSS LLC/IL$2.1B AUM | 0.24% | $5M | 3.43M | Q4 2025OLDER |
| ADVENT CAPITAL MANAGEMENT /DE/$3.6B AUM | 0.21% | $8M | 5.13M | Q1 2026OLDER |
| LINDEN ADVISORS LP$17.9B AUM | 0.20% | $32M | 19.93M | Q4 2025OLDER |
| RWC Asset Management LLP$2.4B AUM | 0.16% | $3M | 2.42M | Q3 2025OLDER |
| Boussard & Gavaudan Investment Management LLP$1.1B AUM | 0.14% | $2M | 1.0K | Q1 2026OLDER |
| Alpine Global Management, LLC$668M AUM | 0.14% | $907,232 | 600 | Q1 2026OLDER |
| VOYA INVESTMENT MANAGEMENT LLC$96.1B AUM | 0.13% | $129M | 85.25M | Q1 2026OLDER |
| LMR Partners LLP$45.4B AUM | 0.12% | $56M | 37.30M | Q1 2026OLDER |
| Calamos Advisors LLC$28.2B AUM | 0.07% | $20M | 13.35M | Q1 2026OLDER |
| BALYASNY ASSET MANAGEMENT L.P.$77.1B AUM | 0.07% | $53M | 35.00M | Q1 2026OLDER |
| TWO SIGMA INVESTMENTS, LP$123.9B AUM | 0.07% | $48M | 30.25M | Q4 2025OLDER |
| M&G Plc$19.4B AUM | 0.06% | $11M | 7.33M | Q1 2026OLDER |
| Union Bancaire Privee, UBP SA$7.2B AUM | 0.03% | $2M | 1.85M | Q1 2026OLDER |
| WOLVERINE ASSET MANAGEMENT LLC$10.4B AUM | 0.02% | $3M | 1.87M | Q4 2025OLDER |
| PALISADE CAPITAL MANAGEMENT, LP$3.0B AUM | 0.02% | $772,740 | 486.0K | Q4 2025OLDER |
| Kohlberg Kravis Roberts & Co. L.P.$5.3B AUM | 0.02% | $1M | 760.0K | Q1 2026OLDER |
| NOMURA HOLDINGS INC$37.7B AUM | 0.02% | $6M | 85.1K | Q1 2026OLDER |
| WESTWOOD HOLDINGS GROUP INC$13.7B AUM | 0.02% | $2M | 2.00M | Q4 2025OLDER |
| CITADEL ADVISORS LLC$618.5B AUM | 0.01% | $88M | 58.00M | Q1 2026OLDER |
| Universal- Beteiligungs- und Servicegesellschaft mbH$58.1B AUM | 0.01% | $7M | 4.67M | Q1 2026OLDER |
| MILLENNIUM MANAGEMENT LLC$240.3B AUM | 0.01% | $25M | 15.50M | Q4 2025OLDER |
| STATE OF WISCONSIN INVESTMENT BOARD$43.7B AUM | 0.01% | $5M | 3.00M | Q1 2026OLDER |
| Jefferies Financial Group Inc.$14.6B AUM | 0.01% | $1M | 908.0K | Q1 2026OLDER |
| Focus Partners Wealth$89.9B AUM | 0.01% | $8M | 5.28M | Q1 2026OLDER |
| Calamos Wealth Management LLC$2.9B AUM | 0.01% | $223,666 | 148.0K | Q1 2026OLDER |
| BNP Paribas Asset Management Holding S.A.$86.1B AUM | 0.01% | $5M | 3.13M | Q1 2026OLDER |
| AGF MANAGEMENT LTD$22.3B AUM | 0.01% | $1M | 750.0K | Q1 2026OLDER |
| BNP PARIBAS FINANCIAL MARKETS$205.8B AUM | 0.00% | $10M | 6.66M | Q1 2026OLDER |
| WELLINGTON MANAGEMENT GROUP LLP$535.5B AUM | 0.00% | $21M | 13.86M | Q1 2026OLDER |
| CITIGROUP INC$234.5B AUM | 0.00% | $9M | 5.38M | Q4 2025OLDER |
| LOOMIS SAYLES & CO L P$74.3B AUM | 0.00% | $2M | 28.6K | Q1 2026OLDER |
| AMERIPRISE FINANCIAL INC$431.8B AUM | 0.00% | $12M | 9.00M | Q3 2025OLDER |
| AXA Investment Managers S.A.$37.1B AUM | 0.00% | $611,677 | 935.0K | Q3 2025OLDER |
| Zurcher Kantonalbank (Zurich Cantonalbank)$46.0B AUM | 0.00% | $690,891 | 500.0K | Q3 2025OLDER |
| WELLS FARGO & COMPANY/MN$530.3B AUM | 0.00% | $8M | 4.98M | Q2 2026 |
| NewEdge Advisors, LLC$27.7B AUM | 0.00% | $17,000 | 17.0K | Q1 2026OLDER |
| BANK OF MONTREAL /CAN/$268.5B AUM | 0.00% | $2M | 1.26M | Q1 2026OLDER |
| STATE STREET CORP$2.90T AUM | 0.00% | $18M | 11.90M | Q1 2026OLDER |
| ROYAL BANK OF CANADA$570.1B AUM | 0.00% | $3M | 2.16M | Q1 2026OLDER |
| BARCLAYS PLC$416.3B AUM | 0.00% | $2M | 1.56M | Q1 2026OLDER |
| FMR LLC$1.90T AUM | 0.00% | $11M | 6.99M | Q1 2026OLDER |
| BlackRock, Inc.$5.72T AUM | 0.00% | $29M | 19.19M | Q1 2026OLDER |
| JPMORGAN CHASE & CO$1.56T AUM | 0.00% | $8M | 5.32M | Q1 2026OLDER |
| Man Group plc$55.1B AUM | 0.00% | $272,142 | 180.0K | Q1 2026OLDER |
| GOLDMAN SACHS GROUP INC$870.9B AUM | 0.00% | $4M | 2.46M | Q1 2026OLDER |
| LAZARD ASSET MANAGEMENT LLC$60.8B AUM | 0.00% | $249,411 | 16.53M | Q1 2026OLDER |
| Invesco Ltd.$653.3B AUM | 0.00% | $2M | 1.50M | Q4 2025OLDER |
| DEUTSCHE BANK AG\$302.7B AUM | 0.00% | $994,968 | 720.0K | Q3 2025OLDER |
| TRUIST FINANCIAL CORP$74.2B AUM | 0.00% | $117,216 | 73.0K | Q1 2026OLDER |
| SEI INVESTMENTS CO$108.4B AUM | 0.00% | $158,156 | 105.0K | Q1 2026OLDER |
| BANK OF AMERICA CORP /DE/$1.37T AUM | 0.00% | $1M | 980.0K | Q1 2026OLDER |
| UBS Group AG$666.3B AUM | 0.00% | $180,750 | 120.0K | Q1 2026OLDER |
| MORGAN STANLEY$1.67T AUM | 0.00% | $149,300 | 94.0K | Q1 2026OLDER |
| Amundi$367.1B AUM | 0.00% | $5,197 | 3.45M | Q1 2026OLDER |
| Erste Asset Management GmbH$10.8B AUM | — | $0 | 0 | Q3 2025OLDER |
Holdings are reported up to 45 days after quarter end. Share counts are as filed and not adjusted for stock splits.