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, Q3 2025
Institutional positions in Sionna Therapeutics, Inc. as of Sep 30, 2025. 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
- 78
- +13 vs. Q2 2025
- Shares held
- 42.8M
- −607.8K (−1.4%) vs. Q2 2025
- Total value
- $1.26B
- +$506.1M (+67.1%) vs. Q2 2025
- New holders
- 19
- 20 more added
- Sold out
- 6
- 19 more reduced
Compare with Q2 2025: 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, Q3 2025
Shares, value and share of portfolio for each institution holding Sionna Therapeutics, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 10,445,322 | $307.2M | 3.79% | 00.0% | Unchanged |
| TPG GP A, LLC | 6,744,962 | $198.4M | 10.80% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 3,704,959 | $109.0M | 2.61% | 00.0% | Unchanged |
| Atlas Venture Life Science Advisors, LLC | 3,615,527 | $106.3M | 14.13% | −78,493−2.1% | Reduced |
| Viking Global Investors LPSuperinvestorViking Global Investors | 3,195,181 | $94.0M | 0.24% | 00.0% | Unchanged |
| Enavate Sciences GP, LLC | 2,478,030 | $72.9M | 22.25% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 1,978,626 | $58.2M | 0.00% | −242,562−10.9% | Reduced |
| Perceptive Advisors LLC | 1,179,098 | $34.7M | 1.00% | −36,947−3.0% | Reduced |
| Vanguard Group Inc | 1,143,154 | $33.6M | 0.00% | +512,803+81.4% | Added |
| Jennison Associates LLC | 997,375 | $29.3M | 0.02% | +244,575+32.5% | Added |
| Deerfield Management Company, L.P. (Series C) | 970,590 | $28.5M | 0.44% | 00.0% | Unchanged |
| Standard Life Aberdeen plc | 950,547 | $28.0M | 0.04% | 00.0% | Unchanged |
| BlackRock, Inc. | 844,605 | $24.8M | 0.00% | +207,501+32.6% | Added |
| Price T Rowe Associates Inc | 637,760 | $18.8M | 0.00% | −223,478−25.9% | Reduced |
| Soleus Capital Management, L.P. | 413,500 | $12.2M | 0.65% | +37,500+10.0% | Added |
| Baker Bros. Advisors LP | 400,000 | $11.8M | 0.09% | 00.0% | Unchanged |
| Siren, L.L.C. | 325,000 | $9.56M | 0.37% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 316,564 | $9.31M | 0.00% | +27,289+9.4% | Added |
| Braidwell LP | 314,013 | $9.24M | 0.27% | −767,842−71.0% | Reduced |
| Franklin Resources Inc | 242,147 | $7.12M | 0.00% | −257,876−51.6% | Reduced |
| State Street Corp | 240,199 | $7.06M | 0.00% | +115,681+92.9% | Added |
| Millennium Management LLC | 214,085 | $6.30M | 0.00% | +200,051+1,425.5% | Added |
| Alyeska Investment Group, L.P. | 186,222 | $5.48M | 0.02% | 00.0% | Unchanged |
| Ameriprise Financial Inc | 153,151 | $4.50M | 0.00% | −83,662−35.3% | Reduced |
| Charles Schwab Investment Management Inc | 111,496 | $3.28M | 0.00% | +18,664+20.1% | Added |
| Silverarc Capital Management, LLC | 108,801 | $3.20M | 0.46% | −77,214−41.5% | Reduced |
| Rock Springs Capital Management LP | 99,429 | $2.92M | 0.17% | 00.0% | Unchanged |
| Northern Trust Corp | 97,711 | $2.87M | 0.00% | +5,821+6.3% | Added |
| TD Asset Management Inc | 87,082 | $2.56M | 0.00% | +37,116+74.3% | Added |
| Driehaus Capital Management LLC | 83,850 | $2.47M | 0.02% | 00.0% | Unchanged |
| Longaeva Partners L.P. | 61,457 | $1.81M | 0.38% | +61,457 | New |
| Holocene Advisors, LP | 50,000 | $1.47M | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 46,666 | $1.37M | 0.00% | −4,701−9.2% | Reduced |
| Wellington Management Group LLP | 42,234 | $1.24M | 0.00% | +42,234 | New |
| Citadel Advisors LLC | 35,923 | $1.06M | 0.00% | −93,989−72.3% | Reduced |
| Manufacturers Life Insurance Company, The | 32,080 | $943.5K | 0.00% | −5,958−15.7% | Reduced |
| Polen Capital Management LLC | 31,258 | $919.3K | 0.00% | +14,283+84.1% | Added |
| Marshall Wace, LLP | 30,103 | $885.3K | 0.00% | +30,103 | New |
| Bank of New York Mellon Corp | 27,463 | $807.7K | 0.00% | +3,332+13.8% | Added |
| Morgan Stanley | 22,837 | $671.6K | 0.00% | −21,181−48.1% | Reduced |
| Barclays PLC | 17,643 | $518.9K | 0.00% | −5,379−23.4% | Reduced |
| Rhumbline Advisers | 17,240 | $507.0K | 0.00% | −430−2.4% | Reduced |
| Nuveen, LLC | 16,040 | $471.7K | 0.00% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 14,600 | $429.4K | 0.00% | −11,400−43.8% | Reduced |
| Goldman Sachs Group Inc | 12,178 | $358.2K | 0.00% | −33,870−73.6% | Reduced |
| Squarepoint Ops LLC | 10,162 | $298.9K | 0.00% | +10,162 | New |
| Deutsche Bank AG | 9,596 | $282.2K | 0.00% | 00.0% | Unchanged |
| Jain Global LLC | 8,513 | $250.4K | 0.00% | +8,513 | New |
| MetLife Investment Management | 8,033 | $236.3K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 7,576 | $222.8K | 0.00% | +1,202+18.9% | Added |
| Intech Investment Management LLC | 7,486 | $220.2K | 0.00% | +7,486 | New |
| Legal & General Group Plc | 7,374 | $217.2K | 0.00% | +6,000+436.7% | Added |
| Virtus Investment Advisers, Inc. | 6,698 | $197.0K | 0.06% | +1,163+21.0% | Added |
| Bank of America Corp | 6,541 | $192.4K | 0.00% | +529+8.8% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 5,643 | $166.0K | 0.00% | −1,104−16.4% | Reduced |
| New York State Common Retirement Fund | 5,300 | $155.9K | 0.00% | −1,500−22.1% | Reduced |
| China Universal Asset Management Co., Ltd. | 5,000 | $147.1K | 0.01% | +5,000 | New |
| Tower Research Capital LLC (TRC) | 4,490 | $132.1K | 0.00% | +4,490 | New |
| Police & Firemen's Retirement System of New Jersey | 3,234 | $95.1K | 0.00% | +626+24.0% | Added |
| BNP Paribas Arbitrage, SA | 2,380 | $70.0K | 0.00% | +619+35.2% | Added |
| Ameritas Investment Partners, Inc. | 1,259 | $37.0K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 1,022 | $30.1K | 0.00% | +1,022 | New |
| California State Teachers Retirement System | 771 | $22.7K | 0.00% | +1+0.1% | Added |
| Citigroup Inc | 687 | $20.2K | 0.00% | −3,693−84.3% | Reduced |
| Aster Capital Management (DIFC) Ltd | 409 | $12.0K | 0.01% | +409 | New |
| Amalgamated Bank | 421 | $12.0K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 378 | $11.0K | 0.00% | +318+530.0% | Added |
| FMR LLC | 234 | $6.88K | 0.00% | +234 | New |
| GAMMA Investing LLC | 153 | $4.50K | 0.00% | +153 | New |
| Federated Hermes, Inc. | 113 | $3.32K | 0.00% | +113 | New |
| US Bancorp | 111 | $3.27K | 0.00% | +111 | New |
| SRS Capital Advisors, Inc. | 92 | $2.71K | 0.00% | +92 | New |
| CWM, LLC | 60 | $2.00K | 0.00% | +60 | New |
| Hughes Financial Services, LLC | 44 | $1.57K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 30 | $882 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 22 | $648 | 0.00% | +22 | New |
| EverSource Wealth Advisors, LLC | 20 | $588 | 0.00% | +20 | New |
| The PNC Financial Services Group, Inc. | 5 | $147 | 0.00% | +5 | New |
| Prudential Financial Inc | 0 | $0 | 0.00% | −135,185−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −80,000−100.0% | Sold out |
| Options Solutions, LLC | 0 | $0 | 0.00% | −16,975−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −14,834−100.0% | Sold out |
| Commonwealth Equity Services, LLC | 0 | $0 | 0.00% | −14,017−100.0% | Sold out |
| STRS Ohio | 0 | $0 | 0.00% | −2,300−100.0% | Sold out |