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, Q1 2026
Institutional positions in Sionna Therapeutics, Inc. as of Mar 31, 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
- 122
- +23 vs. Q4 2025
- Shares held
- 45.4M
- +2.65M (+6.2%) vs. Q4 2025
- Total value
- $1.82B
- +$56.2M (+3.2%) vs. Q4 2025
- New holders
- 32
- 40 more added
- Sold out
- 9
- 30 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Sionna Therapeutics, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 9,905,045 | $397.1M | 4.21% | 00.0% | Unchanged |
| TPG GP A, LLC | 6,494,962 | $260.4M | 7.08% | −250,000−3.7% | Reduced |
| OrbiMed Advisors LLC | 3,530,702 | $141.5M | 3.22% | −30,953−0.9% | Reduced |
| Viking Global Investors LPSuperinvestorViking Global Investors | 3,195,181 | $128.1M | 0.36% | 00.0% | Unchanged |
| Atlas Venture Life Science Advisors, LLC | 2,995,602 | $120.1M | 15.20% | 00.0% | Unchanged |
| Enavate Sciences GP, LLC | 2,478,030 | $99.3M | 28.26% | 00.0% | Unchanged |
| Jennison Associates LLC | 1,451,220 | $58.2M | 0.04% | +335,942+30.1% | Added |
| JPMorgan Chase & Co | 1,465,014 | $53.7M | 0.00% | +233,195+18.9% | Added |
| BlackRock, Inc. | 1,295,867 | $52.0M | 0.00% | +4,268+0.3% | Added |
| Citadel Advisors LLC | 1,166,931 | $46.8M | 0.03% | +79,606+7.3% | Added |
| Vanguard Capital Management LLC | 1,029,497 | $41.3M | 0.00% | +1,029,497 | New |
| Deerfield Management Company, L.P. (Series C) | 970,590 | $38.9M | 0.46% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 756,376 | $30.3M | 0.00% | −74,997−9.0% | Reduced |
| State Street Corp | 756,227 | $30.3M | 0.00% | +62,832+9.1% | Added |
| Perceptive Advisors LLC | 658,439 | $26.4M | 0.52% | −520,659−44.2% | Reduced |
| Eventide Asset Management, LLC | 645,530 | $25.9M | 0.43% | +6,485+1.0% | Added |
| Standard Life Aberdeen plc | 564,175 | $22.6M | 0.04% | −275,785−32.8% | Reduced |
| Baker Bros. Advisors LP | 400,000 | $16.0M | 0.09% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 389,872 | $15.6M | 0.00% | +9,830+2.6% | Added |
| Siren, L.L.C. | 300,000 | $12.0M | 0.33% | 00.0% | Unchanged |
| Sio Capital Management, LLC | 294,340 | $11.8M | 1.70% | +294,340 | New |
| Soleus Capital Management, L.P. | 293,500 | $11.8M | 0.48% | +25,000+9.3% | Added |
| Goldman Sachs Group Inc | 263,174 | $10.6M | 0.00% | +226,905+625.6% | Added |
| Ensign Peak Advisors, Inc | 255,636 | $10.2M | 0.02% | +175,774+220.1% | Added |
| Candriam Luxembourg S.C.A. | 236,813 | $9.49M | 0.05% | +236,813 | New |
| Kalehua Capital Management LLC | 197,072 | $7.90M | 5.59% | 00.0% | Unchanged |
| Franklin Resources Inc | 175,483 | $7.04M | 0.00% | 00.0% | Unchanged |
| Adage Capital Partners GP, L.L.C. | 150,000 | $6.01M | 0.01% | +150,000 | New |
| UBS Group AG | 147,641 | $5.92M | 0.00% | +58,464+65.6% | Added |
| Vanguard Portfolio Management LLC | 142,081 | $5.70M | 0.00% | +142,081 | New |
| Superstring Capital Management LP | 141,024 | $5.65M | 4.04% | −39,569−21.9% | Reduced |
| Millennium Management LLC | 140,641 | $5.64M | 0.00% | +60,095+74.6% | Added |
| Point72 Asset Management, L.P. | 136,549 | $5.47M | 0.01% | +136,549 | New |
| Alyeska Investment Group, L.P. | 136,222 | $5.46M | 0.02% | 00.0% | Unchanged |
| GordonMD Global Investments LP | 136,000 | $5.45M | 4.49% | +136,000 | New |
| Morgan Stanley | 133,023 | $5.33M | 0.00% | +83,147+166.7% | Added |
| Charles Schwab Investment Management Inc | 120,253 | $4.82M | 0.00% | −3,433−2.8% | Reduced |
| Artia Global Partners LP | 119,741 | $4.80M | 1.08% | 00.0% | Unchanged |
| Northern Trust Corp | 116,776 | $4.68M | 0.00% | +4,660+4.2% | Added |
| Vanguard Fiduciary Trust Co | 112,175 | $4.50M | 0.00% | +112,175 | New |
| Rock Springs Capital Management LP | 99,429 | $3.99M | 0.23% | 00.0% | Unchanged |
| Rhenman & Partners Asset Management AB | 87,500 | $3.51M | 0.43% | +87,500 | New |
| TD Asset Management Inc | 82,996 | $3.33M | 0.00% | −30,356−26.8% | Reduced |
| Ameriprise Financial Inc | 81,974 | $3.29M | 0.00% | −19,669−19.4% | Reduced |
| FMR LLC | 81,395 | $3.26M | 0.00% | +81,011+21,096.6% | Added |
| Driehaus Capital Management LLC | 76,633 | $3.07M | 0.02% | −7,217−8.6% | Reduced |
| Manufacturers Life Insurance Company, The | 64,458 | $2.58M | 0.00% | −4,966−7.2% | Reduced |
| Bank of America Corp | 50,870 | $2.04M | 0.00% | +7,303+16.8% | Added |
| Seven Grand Managers, LLC | 50,000 | $2.00M | 0.13% | 00.0% | Unchanged |
| Integral Health Asset Management, LLC | 50,000 | $2.00M | 0.11% | +50,000 | New |
| Ishara Investments LP | 49,200 | $1.97M | 1.99% | +49,200 | New |
| Russell Investments Group, Ltd. | 48,419 | $1.94M | 0.00% | +26,478+120.7% | Added |
| Wellington Management Group LLP | 46,079 | $1.85M | 0.00% | +7,732+20.2% | Added |
| Qube Research & Technologies Ltd | 42,242 | $1.69M | 0.00% | +42,242 | New |
| BNP Paribas Arbitrage, SA | 40,570 | $1.63M | 0.00% | +38,306+1,692.0% | Added |
| Silverarc Capital Management, LLC | 39,417 | $1.58M | 0.19% | −2,043−4.9% | Reduced |
| Alps Advisors Inc | 36,628 | $1.47M | 0.01% | −20−0.1% | Reduced |
| StemPoint Capital LP | 36,540 | $1.46M | 0.28% | +36,540 | New |
| Bank of New York Mellon Corp | 33,778 | $1.35M | 0.00% | −1,356−3.9% | Reduced |
| Polen Capital Management LLC | 26,775 | $1.07M | 0.01% | −4,483−14.3% | Reduced |
| Maven Securities LTD | 25,000 | $1.00M | 0.06% | +25,000 | New |
| Nuveen, LLC | 23,734 | $951.5K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 23,551 | $944.2K | 0.02% | +18,625+378.1% | Added |
| Rafferty Asset Management, LLC | 22,137 | $887.5K | 0.00% | −2,553−10.3% | Reduced |
| Barclays PLC | 18,385 | $737.1K | 0.00% | −29,787−61.8% | Reduced |
| Rhumbline Advisers | 18,308 | $734.0K | 0.00% | +614+3.5% | Added |
| Citigroup Inc | 18,058 | $723.9K | 0.00% | +12,873+248.3% | Added |
| Alliancebernstein L.P. | 16,410 | $675.1K | 0.00% | +790+5.1% | Added |
| Squarepoint Ops LLC | 15,217 | $610.0K | 0.00% | −1,143−7.0% | Reduced |
| Walleye Capital LLC | 15,097 | $605.2K | 0.00% | +15,097 | New |
| Deutsche Bank AG | 13,249 | $531.2K | 0.00% | +3,220+32.1% | Added |
| Longaeva Partners L.P. | 12,693 | $508.9K | 0.02% | −67,036−84.1% | Reduced |
| Kennedy Capital Management, Inc. | 12,284 | $492.5K | 0.01% | +5,532+81.9% | Added |
| Vanguard Global Advisers, LLC | 11,191 | $448.6K | 0.00% | +11,191 | New |
| Invesco Ltd. | 10,787 | $432.5K | 0.00% | −100,375−90.3% | Reduced |
| Profund Advisors LLC | 9,939 | $398.5K | 0.01% | +726+7.9% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 9,185 | $362.9K | 0.00% | +270+3.0% | Added |
| MetLife Investment Management | 8,565 | $343.4K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 7,920 | $317.5K | 0.02% | −2,352−22.9% | Reduced |
| Susquehanna International Group, LLP | 7,310 | $293.1K | 0.00% | +7,310 | New |
| ExodusPoint Capital Management, LP | 7,190 | $288.2K | 0.00% | +7,190 | New |
| VARCOV Co. | 6,571 | $263.4K | 0.10% | +6,571 | New |
| Virtus Investment Advisers, Inc. | 6,374 | $255.5K | 0.07% | +154+2.5% | Added |
| Quarry LP | 6,304 | $252.7K | 0.05% | +6,304 | New |
| Hudson Bay Capital Management LP | 6,180 | $247.8K | 0.00% | +6,180 | New |
| Wells Fargo & Company | 5,894 | $236.3K | 0.00% | −11,657−66.4% | Reduced |
| Two Sigma Investments, LP | 5,500 | $220.5K | 0.00% | −900−14.1% | Reduced |
| Intech Investment Management LLC | 5,489 | $220.1K | 0.00% | −2,100−27.7% | Reduced |
| New York State Common Retirement Fund | 5,300 | $212.5K | 0.00% | 00.0% | Unchanged |
| AlphaCentric Advisors LLC | 4,818 | $193.2K | 0.19% | +2,098+77.1% | Added |
| Police & Firemen's Retirement System of New Jersey | 4,232 | $169.7K | 0.00% | 00.0% | Unchanged |
| Los Angeles Capital Management LLC | 4,116 | $165.0K | 0.00% | −1,073−20.7% | Reduced |
| Cygnus Capital Advisors, LLC | 3,800 | $152.0K | 0.10% | +1,400+58.3% | Added |
| STRS Ohio | 2,900 | $116.3K | 0.00% | +2,900 | New |
| Tower Research Capital LLC (TRC) | 2,352 | $94.3K | 0.00% | +1,223+108.3% | Added |
| Mirae Asset Global Investments Co., Ltd. | 2,328 | $93.3K | 0.00% | +159+7.3% | Added |
| Legal & General Group Plc | 1,432 | $57.4K | 0.00% | −250−14.9% | Reduced |
| Ameritas Investment Partners, Inc. | 1,302 | $52.2K | 0.00% | 00.0% | Unchanged |
| GF Fund Management Co. Ltd. | 1,003 | $40.2K | 0.00% | +127+14.5% | Added |
| California State Teachers Retirement System | 868 | $34.8K | 0.00% | −120−12.1% | Reduced |