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 2025
Institutional positions in Sionna Therapeutics, Inc. as of Jun 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
- 65
- +18 vs. Q1 2025
- Shares held
- 43.4M
- +1.96M (+4.7%) vs. Q1 2025
- Total value
- $753.8M
- +$319.8M (+73.7%) vs. Q1 2025
- New holders
- 26
- 18 more added
- Sold out
- 8
- 10 more reduced
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Sionna Therapeutics, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 10,445,322 | $181.2M | 3.05% | 00.0% | Unchanged |
| TPG GP A, LLC | 6,744,962 | $117.0M | 6.24% | +60,000+0.9% | Added |
| OrbiMed Advisors LLC | 3,704,959 | $64.3M | 1.62% | 00.0% | Unchanged |
| Atlas Venture Life Science Advisors, LLC | 3,694,020 | $64.1M | 9.68% | 00.0% | Unchanged |
| Viking Global Investors LPSuperinvestorViking Global Investors | 3,195,181 | $55.4M | 0.16% | +242,427+8.2% | Added |
| Enavate Sciences GP, LLC | 2,478,030 | $43.0M | 24.35% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 2,221,188 | $38.5M | 0.00% | +51,589+2.4% | Added |
| Perceptive Advisors LLC | 1,216,045 | $21.1M | 0.79% | −35,056−2.8% | Reduced |
| Braidwell LP | 1,081,855 | $18.8M | 0.64% | +1,081,855 | New |
| Deerfield Management Company, L.P. (Series C) | 970,590 | $16.8M | 0.31% | +223,590+29.9% | Added |
| Standard Life Aberdeen plc | 950,547 | $16.5M | 0.03% | +204,583+27.4% | Added |
| Price T Rowe Associates Inc | 861,238 | $14.9M | 0.00% | −134,974−13.5% | Reduced |
| Jennison Associates LLC | 752,800 | $13.1M | 0.01% | −107,127−12.5% | Reduced |
| BlackRock, Inc. | 637,104 | $11.1M | 0.00% | +438,708+221.1% | Added |
| Vanguard Group Inc | 630,351 | $10.9M | 0.00% | +84,184+15.4% | Added |
| Franklin Resources Inc | 500,023 | $8.68M | 0.00% | 00.0% | Unchanged |
| Baker Bros. Advisors LP | 400,000 | $6.94M | 0.07% | 00.0% | Unchanged |
| Soleus Capital Management, L.P. | 376,000 | $6.52M | 0.45% | +136,000+56.7% | Added |
| Siren, L.L.C. | 325,000 | $5.64M | 0.29% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 289,275 | $5.02M | 0.00% | +153,712+113.4% | Added |
| Ameriprise Financial Inc | 236,813 | $4.11M | 0.00% | +27,547+13.2% | Added |
| Alyeska Investment Group, L.P. | 186,222 | $3.23M | 0.01% | 00.0% | Unchanged |
| Silverarc Capital Management, LLC | 186,015 | $3.23M | 0.66% | +71,877+63.0% | Added |
| Prudential Financial Inc | 135,185 | $2.35M | 0.00% | +72,185+114.6% | Added |
| Citadel Advisors LLC | 129,912 | $2.25M | 0.00% | −196,588−60.2% | Reduced |
| State Street Corp | 124,518 | $2.16M | 0.00% | +110,118+764.7% | Added |
| Rock Springs Capital Management LP | 99,429 | $1.73M | 0.11% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 92,832 | $1.61M | 0.00% | +28,188+43.6% | Added |
| Northern Trust Corp | 91,890 | $1.59M | 0.00% | +65,068+242.6% | Added |
| Driehaus Capital Management LLC | 83,850 | $1.45M | 0.01% | −245,039−74.5% | Reduced |
| Woodline Partners LP | 80,000 | $1.39M | 0.01% | 00.0% | Unchanged |
| UBS Group AG | 51,367 | $891.2K | 0.00% | +40,221+360.9% | Added |
| Holocene Advisors, LP | 50,000 | $867.5K | 0.00% | 00.0% | Unchanged |
| TD Asset Management Inc | 49,966 | $866.9K | 0.00% | −5,400−9.8% | Reduced |
| Goldman Sachs Group Inc | 46,048 | $798.9K | 0.00% | −17,693−27.8% | Reduced |
| Morgan Stanley | 44,018 | $763.7K | 0.00% | +40,079+1,017.5% | Added |
| Manufacturers Life Insurance Company, The | 38,038 | $660.0K | 0.00% | +4,489+13.4% | Added |
| Renaissance Technologies LLC | 26,000 | $451.1K | 0.00% | +26,000 | New |
| Bank of New York Mellon Corp | 24,131 | $418.7K | 0.00% | +24,131 | New |
| Barclays PLC | 23,022 | $399.4K | 0.00% | +23,022 | New |
| Rhumbline Advisers | 17,670 | $306.6K | 0.00% | +17,670 | New |
| Polen Capital Management LLC | 16,975 | $294.5K | 0.00% | +16,975 | New |
| Options Solutions, LLC | 16,975 | $294.5K | 0.11% | +16,975 | New |
| Nuveen, LLC | 16,040 | $278.3K | 0.00% | +16,040 | New |
| Susquehanna International Group, LLP | 14,834 | $257.4K | 0.00% | +14,834 | New |
| Millennium Management LLC | 14,034 | $243.5K | 0.00% | −165,038−92.2% | Reduced |
| Commonwealth Equity Services, LLC | 14,017 | $243.0K | 0.00% | +14,017 | New |
| Deutsche Bank AG | 9,596 | $166.5K | 0.00% | +9,596 | New |
| MetLife Investment Management | 8,033 | $139.4K | 0.00% | +8,033 | New |
| New York State Common Retirement Fund | 6,800 | $118.0K | 0.00% | +6,800 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 6,747 | $117.1K | 0.00% | +6,747 | New |
| Wells Fargo & Company | 6,374 | $110.6K | 0.00% | +6,374 | New |
| Bank of America Corp | 6,012 | $104.3K | 0.00% | −2,727−31.2% | Reduced |
| Virtus Investment Advisers, Inc. | 5,535 | $96.0K | 0.03% | +5,535 | New |
| Citigroup Inc | 4,380 | $76.0K | 0.00% | +4,380 | New |
| Police & Firemen's Retirement System of New Jersey | 2,608 | $45.2K | 0.00% | +2,608 | New |
| STRS Ohio | 2,300 | $39.9K | 0.00% | +2,300 | New |
| BNP Paribas Arbitrage, SA | 1,761 | $30.6K | 0.00% | +1,761 | New |
| Legal & General Group Plc | 1,374 | $23.8K | 0.00% | +1,374 | New |
| Ameritas Investment Partners, Inc. | 1,259 | $21.8K | 0.00% | +1,259 | New |
| California State Teachers Retirement System | 770 | $13.4K | 0.00% | +770 | New |
| Amalgamated Bank | 421 | $7.00K | 0.00% | +421 | New |
| Royal Bank of Canada | 60 | $1.00K | 0.00% | −558−90.3% | Reduced |
| Hughes Financial Services, LLC | 44 | $747 | 0.00% | +44 | New |
| Sterling Capital Management LLC | 30 | $521 | 0.00% | +30 | New |
| Zimmer Partners, LP | 0 | $0 | 0.00% | −237,500−100.0% | Sold out |
| CenterBook Partners LP | 0 | $0 | 0.00% | −114,284−100.0% | Sold out |
| StemPoint Capital LP | 0 | $0 | 0.00% | −60,000−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −33,964−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −14,757−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −13,060−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −12,188−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −11,715−100.0% | Sold out |