Sionna Therapeutics, Inc.
SION- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0002036042
In the last 90 days, Sionna Therapeutics, Inc. insiders filed 0 open-market purchases and 4 sales; 146 institutions reported holding it in 13F filings for Q2 2026, worth $2.11B in total; Viking Global Investors is the only superinvestor holding it.
13F holders, Q2 2026
Institutional positions in Sionna Therapeutics, Inc. as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 146
- +25 vs. Q1 2026
- Shares held
- 48.1M
- +2.68M (+5.9%) vs. Q1 2026
- Total value
- $2.11B
- +$294.2M (+16.2%) vs. Q1 2026
- New holders
- 34
- 58 more added
- Sold out
- 9
- 39 more reduced
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting SION on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 146 | $2.11B |
| Q1 2026 | 122 | $1.82B |
| Q4 2025 | 101 | $1.81B |
| Q3 2025 | 78 | $1.26B |
| Q2 2025 | 65 | $753.8M |
| Q1 2025 | 47 | $434.1M |
| Q4 2024 | 0 | $0 |
| Q3 2024 | 0 | $0 |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Sionna Therapeutics, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Allworth Financial LP | 1 | $44 | 0.00% | −28−96.6% | Reduced |
| Rothschild Investment LLC | 1 | $44 | 0.00% | 00.0% | Unchanged |
| National Bank of Canada | 2 | $88 | 0.00% | +2 | New |
| Steward Partners Investment Advisory, LLC | 4 | $176 | 0.00% | −250−98.4% | Reduced |
| The PNC Financial Services Group, Inc. | 5 | $220 | 0.00% | −11−68.8% | Reduced |
| Contravisory Investment Management, Inc. | 6 | $264 | 0.00% | +6 | New |
| SJS Investment Consulting Inc. | 9 | $396 | 0.00% | +9 | New |
| Fortitude Family Office, LLC | 15 | $660 | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 20 | $880 | 0.00% | −3−13.0% | Reduced |
| Covestor Ltd | 12 | $1.00K | 0.00% | +9+300.0% | Added |
| Hughes Financial Services, LLC | 25 | $1.10K | 0.00% | −1−3.8% | Reduced |
| Caitong International Asset Management Co., Ltd | 31 | $1.36K | 0.00% | −5−13.9% | Reduced |
| Bare Financial Services, Inc | 37 | $1.63K | 0.00% | +37 | New |
| SRS Capital Advisors, Inc. | 41 | $1.80K | 0.00% | +41 | New |
| Sterling Capital Management LLC | 65 | $2.86K | 0.00% | −40−38.1% | Reduced |
| US Bancorp | 104 | $4.58K | 0.00% | +53+103.9% | Added |
| Hurley Capital, LLC | 113 | $4.97K | 0.00% | +113 | New |
| Rockefeller Capital Management L.P. | 114 | $5.01K | 0.00% | −127−52.7% | Reduced |
| Farther Finance Advisors, LLC | 196 | $8.62K | 0.00% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 210 | $9.24K | 0.00% | +210 | New |
| GAMMA Investing LLC | 244 | $10.7K | 0.00% | +6+2.5% | Added |
| Pacer Advisors, Inc. | 301 | $13.0K | 0.00% | +301 | New |
| Nisa Investment Advisors, LLC | 385 | $16.9K | 0.00% | +385 | New |
| Royal Bank of Canada | 568 | $25.0K | 0.00% | +538+1,793.3% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 709 | $31.2K | 0.00% | +338+91.1% | Added |
| State of Wyoming | 804 | $35.4K | 0.00% | +804 | New |
| GF Fund Management Co. Ltd. | 946 | $41.6K | 0.00% | −57−5.7% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 1,000 | $44.0K | 0.00% | +1,000 | New |
| Tower Research Capital LLC (TRC) | 1,279 | $56.3K | 0.00% | −1,073−45.6% | Reduced |
| Ameritas Investment Partners, Inc. | 1,673 | $73.6K | 0.00% | +371+28.5% | Added |
| Quantbot Technologies LP | 1,820 | $80.1K | 0.00% | +1,642+922.5% | Added |
| Mirae Asset Global Investments Co., Ltd. | 2,019 | $88.8K | 0.00% | −309−13.3% | Reduced |
| KLP Kapitalforvaltning AS | 3,100 | $136.4K | 0.00% | +3,100 | New |
| Vanguard Investments Australia, Ltd. | 3,490 | $153.5K | 0.00% | +3,490 | New |
| STRS Ohio | 3,500 | $154.0K | 0.00% | +600+20.7% | Added |
| Axq Capital, LP | 4,597 | $202.2K | 0.02% | +4,597 | New |
| Jain Global LLC | 4,780 | $210.3K | 0.00% | +4,780 | New |
| AlphaCentric Advisors LLC | 4,863 | $213.9K | 0.18% | +45+0.9% | Added |
| SEI Investments Co | 5,158 | $226.9K | 0.00% | +5,158 | New |
| State Board of Administration of Florida Retirement System | 5,215 | $229.4K | 0.00% | +5,215 | New |
| Intech Investment Management LLC | 5,218 | $229.5K | 0.00% | −271−4.9% | Reduced |
| Squarepoint Ops LLC | 5,415 | $238.2K | 0.00% | −9,802−64.4% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 5,438 | $239.2K | 0.00% | +1,206+28.5% | Added |
| Jupiter Topco LLC | 6,400 | $281.0K | 0.00% | +6,400 | New |
| VARCOV Co. | 6,418 | $282.3K | 0.11% | −153−2.3% | Reduced |
| Barclays PLC | 6,495 | $285.7K | 0.00% | −11,890−64.7% | Reduced |
| Quarry LP | 6,750 | $296.9K | 0.05% | +446+7.1% | Added |
| China Universal Asset Management Co., Ltd. | 7,186 | $316.1K | 0.02% | −734−9.3% | Reduced |
| Vanguard Global Advisers, LLC | 7,852 | $345.4K | 0.00% | −3,339−29.8% | Reduced |
| Legal & General Group Plc | 9,044 | $397.8K | 0.00% | +7,612+531.6% | Added |
| Virtus Investment Advisers, Inc. | 9,109 | $400.7K | 0.09% | +2,735+42.9% | Added |
| Profund Advisors LLC | 9,140 | $402.1K | 0.01% | −799−8.0% | Reduced |
| Vanguard Asset Management, Ltd | 9,535 | $419.4K | 0.00% | +9,535 | New |
| Jump Financial, LLC | 10,473 | $460.7K | 0.00% | +10,473 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 10,582 | $463.4K | 0.00% | +1,397+15.2% | Added |
| UBS Asset Management Americas Inc | 10,622 | $467.3K | 0.00% | +10,506+9,056.9% | Added |
| MetLife Investment Management | 10,972 | $482.7K | 0.00% | +2,407+28.1% | Added |
| Invesco Ltd. | 12,418 | $546.3K | 0.00% | +1,631+15.1% | Added |
| Marshall Wace, LLP | 12,599 | $554.2K | 0.00% | +12,599 | New |
| Kennedy Capital Management, Inc. | 12,621 | $555.2K | 0.01% | +337+2.7% | Added |
| California State Teachers Retirement System | 14,852 | $653.3K | 0.00% | +13,984+1,611.1% | Added |
| Engineers Gate Manager LP | 15,603 | $686.4K | 0.01% | +15,603 | New |
| Wells Fargo & Company | 16,821 | $740.0K | 0.00% | +10,927+185.4% | Added |
| Shay Capital LLC | 18,000 | $791.8K | 0.09% | +18,000 | New |
| Rafferty Asset Management, LLC | 18,004 | $792.0K | 0.00% | −4,133−18.7% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 18,034 | $793.3K | 0.01% | +18,034 | New |
| Los Angeles Capital Management LLC | 18,645 | $820.2K | 0.00% | +14,529+353.0% | Added |
| Maven Securities LTD | 20,000 | $879.8K | 0.06% | −5,000−20.0% | Reduced |
| Rhumbline Advisers | 22,309 | $981.4K | 0.00% | +4,001+21.9% | Added |
| Tudor Investment Corp Et Al | 22,575 | $993.1K | 0.00% | +22,575 | New |
| Alliancebernstein L.P. | 25,450 | $1.02M | 0.00% | +9,040+55.1% | Added |
| New York State Common Retirement Fund | 23,586 | $1.04M | 0.00% | +18,286+345.0% | Added |
| Trexquant Investment LP | 23,810 | $1.05M | 0.01% | +23,810 | New |
| Quadrature Capital Ltd | 26,023 | $1.14M | 0.01% | +26,023 | New |
| Swiss National Bank | 27,000 | $1.19M | 0.00% | +27,000 | New |
| Ishara Investments LP | 123,000 | $1.35M | 1.01% | +73,800+150.0% | Added |
| BNP Paribas Arbitrage, SA | 31,803 | $1.40M | 0.00% | −8,767−21.6% | Reduced |
| Manufacturers Life Insurance Company, The | 35,420 | $1.56M | 0.00% | −29,038−45.0% | Reduced |
| Mutual of America Capital Management LLC | 35,968 | $1.58M | 0.02% | +35,968 | New |
| Wellington Management Group LLP | 37,365 | $1.64M | 0.00% | −8,714−18.9% | Reduced |
| XTX Topco Ltd | 38,096 | $1.68M | 0.02% | +14,545+61.8% | Added |
| Nuveen, LLC | 41,259 | $1.81M | 0.00% | +17,525+73.8% | Added |
| Bank of New York Mellon Corp | 41,586 | $1.83M | 0.00% | +7,808+23.1% | Added |
| Russell Investments Group, Ltd. | 42,258 | $1.86M | 0.00% | −6,161−12.7% | Reduced |
| Silverarc Capital Management, LLC | 42,478 | $1.87M | 0.21% | +3,061+7.8% | Added |
| Alps Advisors Inc | 45,525 | $2.00M | 0.01% | +8,897+24.3% | Added |
| TD Asset Management Inc | 47,396 | $2.08M | 0.00% | −35,600−42.9% | Reduced |
| Point72 Asset Management, L.P. | 49,328 | $2.17M | 0.00% | −87,221−63.9% | Reduced |
| Seven Grand Managers, LLC | 50,000 | $2.20M | 0.09% | 00.0% | Unchanged |
| Deutsche Bank AG | 53,353 | $2.35M | 0.00% | +40,104+302.7% | Added |
| StemPoint Capital LP | 59,426 | $2.61M | 0.45% | +22,886+62.6% | Added |
| Superstring Capital Management LP | 63,156 | $2.78M | 1.75% | −77,868−55.2% | Reduced |
| Integral Health Asset Management, LLC | 75,000 | $3.30M | 0.14% | +25,000+50.0% | Added |
| Ameriprise Financial Inc | 82,232 | $3.62M | 0.00% | +258+0.3% | Added |
| Bank of America Corp | 88,908 | $3.91M | 0.00% | +38,038+74.8% | Added |
| Rhenman & Partners Asset Management AB | 97,100 | $4.27M | 0.40% | +9,600+11.0% | Added |
| Walleye Capital LLC | 97,347 | $4.28M | 0.02% | +82,250+544.8% | Added |
| Rock Springs Capital Management LP | 99,429 | $4.37M | 0.21% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 101,644 | $4.47M | 0.00% | +101,644 | New |
| Citigroup Inc | 110,163 | $4.85M | 0.00% | +92,105+510.1% | Added |