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 |
|---|---|---|---|---|---|
| First Turn Management, LLC | 110,493 | $4.86M | 0.52% | +110,493 | New |
| UBS Group AG | 116,206 | $5.11M | 0.00% | −31,435−21.3% | Reduced |
| Artia Global Partners LP | 119,741 | $5.27M | 1.00% | 00.0% | Unchanged |
| Vanguard Fiduciary Trust Co | 121,442 | $5.34M | 0.00% | +9,267+8.3% | Added |
| Sio Capital Management, LLC | 127,808 | $5.62M | 0.96% | −166,532−56.6% | Reduced |
| Charles Schwab Investment Management Inc | 129,753 | $5.71M | 0.00% | +9,500+7.9% | Added |
| GordonMD Global Investments LP | 136,000 | $5.98M | 3.28% | 00.0% | Unchanged |
| Alyeska Investment Group, L.P. | 136,222 | $5.99M | 0.02% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 140,309 | $6.17M | 0.01% | +98,067+232.2% | Added |
| Sofinnova Investments, Inc. | 144,432 | $6.35M | 0.34% | +144,432 | New |
| Morgan Stanley | 151,047 | $6.64M | 0.00% | +18,024+13.5% | Added |
| Northern Trust Corp | 154,476 | $6.80M | 0.00% | +37,700+32.3% | Added |
| Soleus Capital Management, L.P. | 177,687 | $7.82M | 0.27% | −115,813−39.5% | Reduced |
| Ensign Peak Advisors, Inc | 184,532 | $8.12M | 0.01% | −71,104−27.8% | Reduced |
| Artisan Partners Limited Partnership | 189,498 | $8.34M | 0.01% | +189,498 | New |
| Longaeva Partners L.P. | 196,352 | $8.64M | 0.25% | +183,659+1,446.9% | Added |
| Kalehua Capital Management LLC | 197,072 | $8.67M | 4.98% | 00.0% | Unchanged |
| Vanguard Portfolio Management LLC | 222,949 | $9.81M | 0.00% | +80,868+56.9% | Added |
| Candriam Luxembourg S.C.A. | 233,208 | $10.2M | 0.05% | −3,605−1.5% | Reduced |
| Millennium Management LLC | 276,733 | $12.2M | 0.01% | +136,092+96.8% | Added |
| FMR LLC | 278,292 | $12.2M | 0.00% | +196,897+241.9% | Added |
| Standard Life Aberdeen plc | 284,138 | $12.5M | 0.02% | −280,037−49.6% | Reduced |
| Franklin Resources Inc | 290,113 | $12.8M | 0.00% | +114,630+65.3% | Added |
| Driehaus Capital Management LLC | 385,447 | $17.0M | 0.10% | +308,814+403.0% | Added |
| Goldman Sachs Group Inc | 388,810 | $17.1M | 0.00% | +125,636+47.7% | 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 |
| Geode Capital Management, LLC | 457,145 | $20.1M | 0.00% | +67,273+17.3% | Added |
| Eventide Asset Management, LLC | 474,981 | $20.9M | 0.28% | −170,549−26.4% | Reduced |
| Price T Rowe Associates Inc | 478,016 | $21.0M | 0.00% | −278,360−36.8% | Reduced |
| Siren, L.L.C. | 610,515 | $26.9M | 0.55% | +310,515+103.5% | Added |
| Deerfield Management Company, L.P. (Series C) | 680,916 | $30.0M | 0.31% | −289,674−29.8% | Reduced |
| Perceptive Advisors LLC | 905,000 | $39.8M | 0.62% | +246,561+37.4% | Added |
| State Street Corp | 1,021,534 | $44.9M | 0.00% | +265,307+35.1% | Added |
| Vanguard Capital Management LLC | 1,132,001 | $49.8M | 0.00% | +102,504+10.0% | Added |
| Citadel Advisors LLC | 1,147,636 | $50.5M | 0.03% | −19,295−1.7% | Reduced |
| Jennison Associates LLC | 1,172,133 | $51.6M | 0.03% | −279,087−19.2% | Reduced |
| JPMorgan Chase & Co | 1,490,508 | $64.1M | 0.00% | +25,494+1.7% | Added |
| BlackRock, Inc. | 1,474,769 | $64.9M | 0.00% | +178,902+13.8% | Added |
| Adage Capital Partners GP, L.L.C. | 1,600,000 | $70.4M | 0.10% | +1,450,000+966.7% | Added |
| Enavate Sciences GP, LLC | 2,478,030 | $109.0M | 31.56% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 2,555,877 | $112.4M | 2.13% | −974,825−27.6% | Reduced |
| Atlas Venture Life Science Advisors, LLC | 2,995,602 | $131.8M | 14.95% | 00.0% | Unchanged |
| Viking Global Investors LPSuperinvestorViking Global Investors | 3,195,181 | $140.6M | 0.40% | 00.0% | Unchanged |
| TPG GP A, LLC | 6,494,962 | $285.7M | 5.71% | 00.0% | Unchanged |
| Ra Capital Management, L.P. | 9,905,045 | $435.7M | 3.79% | 00.0% | Unchanged |
| Polen Capital Management LLC | 0 | $0 | 0.00% | −26,775−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −7,310−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −7,190−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −6,180−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −5,500−100.0% | Sold out |
| Cygnus Capital Advisors, LLC | 0 | $0 | 0.00% | −3,800−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −24−100.0% | Sold out |
| Root Financial Partners, LLC | 0 | $0 | 0.00% | −10−100.0% | Sold out |
| MAI Capital Management | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| CWM, LLC | – | – | – | – | Not filed |