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 $2.12B 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
- 48.3M
- +2.64M (+5.8%) vs. Q1 2026
- Total value
- $2.12B
- +$293.5M (+16.1%) vs. Q1 2026
- New holders
- 34
- 57 more added
- Sold out
- 9
- 40 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 | $2.12B |
| Q1 2026 | 122 | $1.82B |
| Q4 2025 | 101 | $1.81B |
| Q3 2025 | 78 | $1.32B |
| 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 |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 9,905,045 | $435.7M | 3.79% | 00.0% | Unchanged |
| TPG GP A, LLC | 6,494,962 | $285.7M | 5.71% | 00.0% | Unchanged |
| Viking Global Investors LPSuperinvestorViking Global Investors | 3,195,181 | $140.6M | 0.40% | 00.0% | Unchanged |
| Atlas Venture Life Science Advisors, LLC | 2,995,602 | $131.8M | 14.95% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 2,555,877 | $112.4M | 2.13% | −974,825−27.6% | Reduced |
| Enavate Sciences GP, LLC | 2,478,030 | $109.0M | 31.56% | 00.0% | Unchanged |
| Adage Capital Partners GP, L.L.C. | 1,600,000 | $70.4M | 0.10% | +1,450,000+966.7% | Added |
| BlackRock, Inc. | 1,474,769 | $64.9M | 0.00% | +178,902+13.8% | Added |
| JPMorgan Chase & Co | 1,490,508 | $64.1M | 0.00% | +25,494+1.7% | Added |
| Jennison Associates LLC | 1,172,133 | $51.6M | 0.03% | −279,087−19.2% | Reduced |
| Citadel Advisors LLC | 1,147,636 | $50.5M | 0.03% | −19,295−1.7% | Reduced |
| Vanguard Capital Management LLC | 1,132,001 | $49.8M | 0.00% | +102,504+10.0% | Added |
| State Street Corp | 1,021,534 | $44.9M | 0.00% | +265,307+35.1% | Added |
| Perceptive Advisors LLC | 905,000 | $39.8M | 0.62% | +246,561+37.4% | Added |
| Deerfield Management Company, L.P. (Series C) | 680,916 | $30.0M | 0.31% | −289,674−29.8% | Reduced |
| Siren, L.L.C. | 610,515 | $26.9M | 0.55% | +310,515+103.5% | Added |
| Price T Rowe Associates Inc | 478,016 | $21.0M | 0.00% | −278,360−36.8% | Reduced |
| Eventide Asset Management, LLC | 474,981 | $20.9M | 0.28% | −170,549−26.4% | Reduced |
| Geode Capital Management, LLC | 457,145 | $20.1M | 0.00% | +67,273+17.3% | Added |
| Baker Bros. Advisors LP | 400,000 | $17.6M | 0.09% | 00.0% | Unchanged |
| Casdin Capital, LLC | 400,000 | $17.6M | 0.88% | +400,000 | New |
| Kalehua Capital Management LLC | 394,144 | $17.3M | 5.53% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 388,810 | $17.1M | 0.00% | +125,636+47.7% | Added |
| Driehaus Capital Management LLC | 385,447 | $17.0M | 0.10% | +308,814+403.0% | Added |
| Franklin Resources Inc | 290,113 | $12.8M | 0.00% | +114,630+65.3% | Added |
| Standard Life Aberdeen plc | 284,138 | $12.5M | 0.02% | −280,037−49.6% | Reduced |
| FMR LLC | 278,292 | $12.2M | 0.00% | +196,897+241.9% | Added |
| Millennium Management LLC | 276,733 | $12.2M | 0.01% | +136,092+96.8% | Added |
| Candriam Luxembourg S.C.A. | 233,208 | $10.2M | 0.05% | −3,605−1.5% | Reduced |
| Vanguard Portfolio Management LLC | 222,949 | $9.81M | 0.00% | +80,868+56.9% | Added |
| Longaeva Partners L.P. | 196,352 | $8.64M | 0.25% | +183,659+1,446.9% | Added |
| Artisan Partners Limited Partnership | 189,498 | $8.34M | 0.01% | +189,498 | New |
| Ensign Peak Advisors, Inc | 184,532 | $8.12M | 0.01% | −71,104−27.8% | Reduced |
| Soleus Capital Management, L.P. | 177,687 | $7.82M | 0.27% | −115,813−39.5% | Reduced |
| Northern Trust Corp | 154,476 | $6.80M | 0.00% | +37,700+32.3% | Added |
| Morgan Stanley | 151,047 | $6.64M | 0.00% | +18,024+13.5% | Added |
| Sofinnova Investments, Inc. | 144,432 | $6.35M | 0.34% | +144,432 | New |
| Qube Research & Technologies Ltd | 140,309 | $6.17M | 0.01% | +98,067+232.2% | Added |
| Alyeska Investment Group, L.P. | 136,222 | $5.99M | 0.02% | 00.0% | Unchanged |
| GordonMD Global Investments LP | 136,000 | $5.98M | 2.89% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 129,753 | $5.71M | 0.00% | +9,500+7.9% | Added |
| Sio Capital Management, LLC | 127,808 | $5.62M | 0.96% | −166,532−56.6% | Reduced |
| Vanguard Fiduciary Trust Co | 121,442 | $5.34M | 0.00% | +9,267+8.3% | Added |
| Artia Global Partners LP | 119,741 | $5.27M | 1.00% | 00.0% | Unchanged |
| UBS Group AG | 116,206 | $5.11M | 0.00% | −31,435−21.3% | Reduced |
| First Turn Management, LLC | 110,493 | $4.86M | 0.52% | +110,493 | New |
| Citigroup Inc | 110,163 | $4.85M | 0.00% | +92,105+510.1% | Added |
| D. E. Shaw & Co., Inc. | 101,644 | $4.47M | 0.00% | +101,644 | New |
| Rock Springs Capital Management LP | 99,429 | $4.37M | 0.21% | 00.0% | Unchanged |
| Walleye Capital LLC | 97,347 | $4.28M | 0.02% | +82,250+544.8% | Added |
| Rhenman & Partners Asset Management AB | 97,100 | $4.27M | 0.40% | +9,600+11.0% | Added |
| Bank of America Corp | 88,908 | $3.91M | 0.00% | +38,038+74.8% | Added |
| Ameriprise Financial Inc | 82,232 | $3.62M | 0.00% | +258+0.3% | Added |
| Integral Health Asset Management, LLC | 75,000 | $3.30M | 0.14% | +25,000+50.0% | Added |
| Superstring Capital Management LP | 63,156 | $2.78M | 1.75% | −77,868−55.2% | Reduced |
| StemPoint Capital LP | 59,426 | $2.61M | 0.45% | −13,654−18.7% | Reduced |
| Deutsche Bank AG | 53,353 | $2.35M | 0.00% | +40,104+302.7% | Added |
| Seven Grand Managers, LLC | 50,000 | $2.20M | 0.09% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 49,328 | $2.17M | 0.00% | −87,221−63.9% | Reduced |
| TD Asset Management Inc | 47,396 | $2.08M | 0.00% | −35,600−42.9% | Reduced |
| Alps Advisors Inc | 45,525 | $2.00M | 0.01% | +8,897+24.3% | Added |
| Silverarc Capital Management, LLC | 42,478 | $1.87M | 0.21% | +3,061+7.8% | Added |
| Russell Investments Group, Ltd. | 42,258 | $1.86M | 0.00% | −6,161−12.7% | Reduced |
| Bank of New York Mellon Corp | 41,586 | $1.83M | 0.00% | +7,808+23.1% | Added |
| Nuveen, LLC | 41,259 | $1.81M | 0.00% | +17,525+73.8% | Added |
| XTX Topco Ltd | 38,096 | $1.68M | 0.02% | +14,545+61.8% | Added |
| Wellington Management Group LLP | 37,365 | $1.64M | 0.00% | −8,714−18.9% | Reduced |
| Mutual of America Capital Management LLC | 35,968 | $1.58M | 0.02% | +35,968 | New |
| Manufacturers Life Insurance Company, The | 35,420 | $1.56M | 0.00% | −29,038−45.0% | Reduced |
| BNP Paribas Arbitrage, SA | 31,803 | $1.40M | 0.00% | −8,767−21.6% | Reduced |
| Ishara Investments LP | 123,000 | $1.35M | 0.99% | +73,800+150.0% | Added |
| Swiss National Bank | 27,000 | $1.19M | 0.00% | +27,000 | New |
| Quadrature Capital Ltd | 26,023 | $1.14M | 0.01% | +26,023 | New |
| Trexquant Investment LP | 23,810 | $1.05M | 0.01% | +23,810 | New |
| New York State Common Retirement Fund | 23,586 | $1.04M | 0.00% | +18,286+345.0% | Added |
| Alliancebernstein L.P. | 25,450 | $1.02M | 0.00% | +9,040+55.1% | Added |
| Tudor Investment Corp Et Al | 22,575 | $993.1K | 0.00% | +22,575 | New |
| Rhumbline Advisers | 22,309 | $981.4K | 0.00% | +4,001+21.9% | Added |
| Maven Securities LTD | 20,000 | $879.8K | 0.06% | −5,000−20.0% | Reduced |
| Los Angeles Capital Management LLC | 18,645 | $820.2K | 0.00% | +14,529+353.0% | Added |
| Susquehanna Portfolio Strategies, LLC | 18,034 | $793.3K | 0.01% | +18,034 | New |
| Rafferty Asset Management, LLC | 18,004 | $792.0K | 0.00% | −4,133−18.7% | Reduced |
| Shay Capital LLC | 18,000 | $791.8K | 0.09% | +18,000 | New |
| Wells Fargo & Company | 16,821 | $740.0K | 0.00% | +10,927+185.4% | Added |
| Engineers Gate Manager LP | 15,603 | $686.4K | 0.01% | +15,603 | New |
| California State Teachers Retirement System | 14,852 | $653.3K | 0.00% | +13,984+1,611.1% | Added |
| Kennedy Capital Management, Inc. | 12,621 | $555.2K | 0.01% | +337+2.7% | Added |
| Marshall Wace, LLP | 12,599 | $554.2K | 0.00% | +12,599 | New |
| Invesco Ltd. | 12,418 | $546.3K | 0.00% | +1,631+15.1% | Added |
| MetLife Investment Management | 10,972 | $482.7K | 0.00% | +2,407+28.1% | Added |
| UBS Asset Management Americas Inc | 10,622 | $467.3K | 0.00% | +10,506+9,056.9% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 10,582 | $463.4K | 0.00% | +1,397+15.2% | Added |
| Jump Financial, LLC | 10,473 | $460.7K | 0.00% | +10,473 | New |
| Vanguard Asset Management, Ltd | 9,535 | $419.4K | 0.00% | +9,535 | New |
| Profund Advisors LLC | 9,140 | $402.1K | 0.01% | −799−8.0% | Reduced |
| Virtus Investment Advisers, Inc. | 9,109 | $400.7K | 0.09% | +2,735+42.9% | Added |
| Legal & General Group Plc | 9,044 | $397.8K | 0.00% | +7,612+531.6% | Added |
| Vanguard Global Advisers, LLC | 7,852 | $345.4K | 0.00% | −3,339−29.8% | Reduced |
| China Universal Asset Management Co., Ltd. | 7,186 | $316.1K | 0.02% | −734−9.3% | Reduced |
| Quarry LP | 6,750 | $296.9K | 0.05% | +446+7.1% | Added |