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, Q4 2025
Institutional positions in Sionna Therapeutics, Inc. as of Dec 31, 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
- 101
- +23 vs. Q3 2025
- Shares held
- 44.0M
- +1.11M (+2.6%) vs. Q3 2025
- Total value
- $1.81B
- +$548.2M (+43.5%) vs. Q3 2025
- New holders
- 30
- 39 more added
- Sold out
- 7
- 20 more reduced
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Sionna Therapeutics, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 9,905,045 | $407.5M | 4.17% | −540,277−5.2% | Reduced |
| TPG GP A, LLC | 6,744,962 | $277.5M | 10.33% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 3,561,655 | $146.5M | 3.00% | −143,304−3.9% | Reduced |
| Viking Global Investors LPSuperinvestorViking Global Investors | 3,195,181 | $131.4M | 0.35% | 00.0% | Unchanged |
| Atlas Venture Life Science Advisors, LLC | 2,995,602 | $123.2M | 14.24% | −619,925−17.1% | Reduced |
| Enavate Sciences GP, LLC | 2,478,030 | $101.9M | 20.12% | 00.0% | Unchanged |
| BlackRock, Inc. | 1,291,599 | $53.1M | 0.00% | +446,994+52.9% | Added |
| JPMorgan Chase & Co | 1,231,819 | $50.7M | 0.00% | −746,807−37.7% | Reduced |
| Vanguard Group Inc | 1,184,951 | $48.7M | 0.00% | +41,797+3.7% | Added |
| Perceptive Advisors LLC | 1,179,098 | $48.5M | 0.89% | 00.0% | Unchanged |
| Jennison Associates LLC | 1,115,278 | $45.9M | 0.03% | +117,903+11.8% | Added |
| Citadel Advisors LLC | 1,087,325 | $44.7M | 0.03% | +1,051,402+2,926.8% | Added |
| Deerfield Management Company, L.P. (Series C) | 970,590 | $39.9M | 0.51% | 00.0% | Unchanged |
| Standard Life Aberdeen plc | 839,960 | $34.6M | 0.05% | −110,587−11.6% | Reduced |
| Price T Rowe Associates Inc | 831,373 | $34.2M | 0.00% | +193,613+30.4% | Added |
| State Street Corp | 693,395 | $28.5M | 0.00% | +453,196+188.7% | Added |
| Eventide Asset Management, LLC | 639,045 | $26.3M | 0.41% | +639,045 | New |
| Baker Bros. Advisors LP | 400,000 | $16.5M | 0.10% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 380,042 | $15.6M | 0.00% | +63,478+20.1% | Added |
| Siren, L.L.C. | 300,000 | $12.3M | 0.37% | −25,000−7.7% | Reduced |
| Soleus Capital Management, L.P. | 268,500 | $11.0M | 0.47% | −145,000−35.1% | Reduced |
| Kalehua Capital Management LLC | 197,072 | $8.11M | 8.02% | +197,072 | New |
| Superstring Capital Management LP | 180,593 | $7.43M | 3.98% | +180,593 | New |
| Franklin Resources Inc | 175,483 | $7.22M | 0.00% | −66,664−27.5% | Reduced |
| Alyeska Investment Group, L.P. | 136,222 | $5.60M | 0.02% | −50,000−26.8% | Reduced |
| Charles Schwab Investment Management Inc | 123,686 | $5.09M | 0.00% | +12,190+10.9% | Added |
| Artia Global Partners LP | 119,741 | $4.93M | 0.79% | +119,741 | New |
| TD Asset Management Inc | 113,352 | $4.66M | 0.00% | +26,270+30.2% | Added |
| Northern Trust Corp | 112,116 | $4.61M | 0.00% | +14,405+14.7% | Added |
| Invesco Ltd. | 111,162 | $4.57M | 0.00% | +111,162 | New |
| Ameriprise Financial Inc | 101,643 | $4.18M | 0.00% | −51,508−33.6% | Reduced |
| Rock Springs Capital Management LP | 99,429 | $4.09M | 0.21% | 00.0% | Unchanged |
| UBS Group AG | 89,177 | $3.67M | 0.00% | +42,511+91.1% | Added |
| Driehaus Capital Management LLC | 83,850 | $3.45M | 0.02% | 00.0% | Unchanged |
| Millennium Management LLC | 80,546 | $3.31M | 0.00% | −133,539−62.4% | Reduced |
| Ensign Peak Advisors, Inc | 79,862 | $3.29M | 0.01% | +79,862 | New |
| Longaeva Partners L.P. | 79,729 | $3.28M | 0.39% | +18,272+29.7% | Added |
| Manufacturers Life Insurance Company, The | 69,424 | $2.87M | 0.00% | +37,344+116.4% | Added |
| Seven Grand Managers, LLC | 50,000 | $2.06M | 0.16% | +50,000 | New |
| Morgan Stanley | 49,876 | $2.05M | 0.00% | +27,039+118.4% | Added |
| Barclays PLC | 48,172 | $1.98M | 0.00% | +30,529+173.0% | Added |
| Bank of America Corp | 43,567 | $1.79M | 0.00% | +37,026+566.1% | Added |
| Silverarc Capital Management, LLC | 41,460 | $1.71M | 0.25% | −67,341−61.9% | Reduced |
| Wellington Management Group LLP | 38,347 | $1.58M | 0.00% | −3,887−9.2% | Reduced |
| Alps Advisors Inc | 36,648 | $1.51M | 0.01% | +36,648 | New |
| Goldman Sachs Group Inc | 36,269 | $1.49M | 0.00% | +24,091+197.8% | Added |
| Bank of New York Mellon Corp | 35,134 | $1.45M | 0.00% | +7,671+27.9% | Added |
| Polen Capital Management LLC | 31,258 | $1.29M | 0.01% | 00.0% | Unchanged |
| Rafferty Asset Management, LLC | 24,690 | $1.02M | 0.00% | +24,690 | New |
| Nuveen, LLC | 23,734 | $976.4K | 0.00% | +7,694+48.0% | Added |
| Russell Investments Group, Ltd. | 21,941 | $902.7K | 0.00% | +20,919+2,046.9% | Added |
| Rhumbline Advisers | 17,694 | $727.9K | 0.00% | +454+2.6% | Added |
| Wells Fargo & Company | 17,551 | $722.0K | 0.00% | +9,975+131.7% | Added |
| Squarepoint Ops LLC | 16,360 | $673.0K | 0.00% | +6,198+61.0% | Added |
| Alliancebernstein L.P. | 15,620 | $642.6K | 0.00% | +15,620 | New |
| SG Americas Securities, LLC | 10,691 | $440.0K | 0.00% | +10,691 | New |
| China Universal Asset Management Co., Ltd. | 10,272 | $422.6K | 0.03% | +5,272+105.4% | Added |
| Deutsche Bank AG | 10,029 | $412.6K | 0.00% | +433+4.5% | Added |
| Profund Advisors LLC | 9,213 | $379.0K | 0.01% | +9,213 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 8,915 | $367.1K | 0.00% | +3,272+58.0% | Added |
| MetLife Investment Management | 8,565 | $352.4K | 0.00% | +532+6.6% | Added |
| Intech Investment Management LLC | 7,589 | $312.2K | 0.00% | +103+1.4% | Added |
| Kennedy Capital Management, Inc. | 6,752 | $277.8K | 0.01% | +6,752 | New |
| Two Sigma Investments, LP | 6,400 | $263.3K | 0.00% | +6,400 | New |
| Virtus Investment Advisers, Inc. | 6,220 | $255.9K | 0.07% | −478−7.1% | Reduced |
| American Century Companies Inc | 6,180 | $254.2K | 0.00% | +6,180 | New |
| Dark Forest Capital Management LP | 5,991 | $246.5K | 0.01% | +5,991 | New |
| D. E. Shaw & Co., Inc. | 5,742 | $236.2K | 0.00% | +5,742 | New |
| New York State Common Retirement Fund | 5,300 | $218.0K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 5,185 | $213.3K | 0.00% | +4,498+654.7% | Added |
| XTX Topco Ltd | 4,926 | $202.7K | 0.01% | +4,926 | New |
| ProShare Advisors LLC | 4,903 | $201.7K | 0.00% | +4,903 | New |
| Los Angeles Capital Management LLC | 5,189 | $197.2K | 0.00% | +5,189 | New |
| CIBC Private Wealth Group, LLC | 4,500 | $185.1K | 0.00% | +4,500 | New |
| Police & Firemen's Retirement System of New Jersey | 4,232 | $174.1K | 0.00% | +998+30.9% | Added |
| AlphaCentric Advisors LLC | 2,720 | $111.9K | 0.11% | +2,720 | New |
| Cygnus Capital Advisors, LLC | 2,400 | $99.0K | 0.07% | +2,400 | New |
| BNP Paribas Arbitrage, SA | 2,264 | $93.1K | 0.00% | −116−4.9% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 2,169 | $89.2K | 0.00% | +2,169 | New |
| Legal & General Group Plc | 1,682 | $69.2K | 0.00% | −5,692−77.2% | Reduced |
| Balyasny Asset Management LLC | 1,406 | $57.8K | 0.00% | +1,406 | New |
| Ameritas Investment Partners, Inc. | 1,302 | $53.6K | 0.00% | +43+3.4% | Added |
| Tower Research Capital LLC (TRC) | 1,129 | $46.4K | 0.00% | −3,361−74.9% | Reduced |
| California State Teachers Retirement System | 988 | $40.6K | 0.00% | +217+28.1% | Added |
| GF Fund Management Co. Ltd. | 876 | $36.0K | 0.00% | +876 | New |
| Amalgamated Bank | 504 | $21.0K | 0.00% | +83+19.7% | Added |
| Royal Bank of Canada | 489 | $21.0K | 0.00% | +111+29.4% | Added |
| FMR LLC | 384 | $15.8K | 0.00% | +150+64.1% | Added |
| Farther Finance Advisors, LLC | 190 | $7.82K | 0.00% | +190 | New |
| GAMMA Investing LLC | 177 | $7.28K | 0.00% | +24+15.7% | Added |
| Daiwa Securities Group Inc. | 149 | $6.00K | 0.00% | +149 | New |
| Sterling Capital Management LLC | 105 | $4.32K | 0.00% | +75+250.0% | Added |
| CWM, LLC | 80 | $3.00K | 0.00% | +20+33.3% | Added |
| US Bancorp | 65 | $2.67K | 0.00% | −46−41.4% | Reduced |
| Rockefeller Capital Management L.P. | 48 | $1.98K | 0.00% | +48 | New |
| Aster Capital Management (DIFC) Ltd | 37 | $1.52K | 0.00% | −372−91.0% | Reduced |
| Allworth Financial LP | 28 | $1.15K | 0.00% | +6+27.3% | Added |
| Hughes Financial Services, LLC | 25 | $1.03K | 0.00% | −19−43.2% | Reduced |
| EverSource Wealth Advisors, LLC | 20 | $823 | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 5 | $206 | 0.00% | 00.0% | Unchanged |