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 |
|---|---|---|---|---|---|
| Covestor Ltd | 3 | $0 | 0.00% | +3 | New |
| Rothschild Investment LLC | 1 | $40 | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 2 | $81 | 0.00% | +2 | New |
| Root Financial Partners, LLC | 10 | $401 | 0.00% | +10 | New |
| Fortitude Family Office, LLC | 15 | $601 | 0.00% | +15 | New |
| The PNC Financial Services Group, Inc. | 16 | $641 | 0.00% | +11+220.0% | Added |
| EverSource Wealth Advisors, LLC | 23 | $922 | 0.00% | +3+15.0% | Added |
| Signaturefd, LLC | 24 | $962 | 0.00% | +24 | New |
| Royal Bank of Canada | 30 | $1.00K | 0.00% | −459−93.9% | Reduced |
| Hughes Financial Services, LLC | 26 | $1.04K | 0.00% | +1+4.0% | Added |
| Allworth Financial LP | 29 | $1.16K | 0.00% | +1+3.6% | Added |
| Caitong International Asset Management Co., Ltd | 36 | $1.44K | 0.00% | +36 | New |
| US Bancorp | 51 | $2.04K | 0.00% | −14−21.5% | Reduced |
| CWM, LLC | 67 | $2.69K | 0.00% | −13−16.3% | Reduced |
| Sterling Capital Management LLC | 105 | $4.21K | 0.00% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 116 | $4.65K | 0.00% | +116 | New |
| Quantbot Technologies LP | 178 | $7.14K | 0.00% | +178 | New |
| Farther Finance Advisors, LLC | 196 | $8.10K | 0.00% | +6+3.2% | Added |
| GAMMA Investing LLC | 238 | $9.54K | 0.00% | +61+34.5% | Added |
| Rockefeller Capital Management L.P. | 241 | $9.66K | 0.00% | +193+402.1% | Added |
| Steward Partners Investment Advisory, LLC | 254 | $10.2K | 0.00% | +254 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 371 | $14.9K | 0.00% | +371 | New |
| California State Teachers Retirement System | 868 | $34.8K | 0.00% | −120−12.1% | Reduced |
| GF Fund Management Co. Ltd. | 1,003 | $40.2K | 0.00% | +127+14.5% | Added |
| Ameritas Investment Partners, Inc. | 1,302 | $52.2K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 1,432 | $57.4K | 0.00% | −250−14.9% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 2,328 | $93.3K | 0.00% | +159+7.3% | Added |
| Tower Research Capital LLC (TRC) | 2,352 | $94.3K | 0.00% | +1,223+108.3% | Added |
| STRS Ohio | 2,900 | $116.3K | 0.00% | +2,900 | New |
| Cygnus Capital Advisors, LLC | 3,800 | $152.0K | 0.10% | +1,400+58.3% | Added |
| Los Angeles Capital Management LLC | 4,116 | $165.0K | 0.00% | −1,073−20.7% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 4,232 | $169.7K | 0.00% | 00.0% | Unchanged |
| AlphaCentric Advisors LLC | 4,818 | $193.2K | 0.19% | +2,098+77.1% | Added |
| New York State Common Retirement Fund | 5,300 | $212.5K | 0.00% | 00.0% | Unchanged |
| Intech Investment Management LLC | 5,489 | $220.1K | 0.00% | −2,100−27.7% | Reduced |
| Two Sigma Investments, LP | 5,500 | $220.5K | 0.00% | −900−14.1% | Reduced |
| Wells Fargo & Company | 5,894 | $236.3K | 0.00% | −11,657−66.4% | Reduced |
| Hudson Bay Capital Management LP | 6,180 | $247.8K | 0.00% | +6,180 | New |
| Quarry LP | 6,304 | $252.7K | 0.05% | +6,304 | New |
| Virtus Investment Advisers, Inc. | 6,374 | $255.5K | 0.07% | +154+2.5% | Added |
| VARCOV Co. | 6,571 | $263.4K | 0.10% | +6,571 | New |
| ExodusPoint Capital Management, LP | 7,190 | $288.2K | 0.00% | +7,190 | New |
| Susquehanna International Group, LLP | 7,310 | $293.1K | 0.00% | +7,310 | New |
| China Universal Asset Management Co., Ltd. | 7,920 | $317.5K | 0.02% | −2,352−22.9% | Reduced |
| MetLife Investment Management | 8,565 | $343.4K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 9,185 | $362.9K | 0.00% | +270+3.0% | Added |
| Profund Advisors LLC | 9,939 | $398.5K | 0.01% | +726+7.9% | Added |
| Invesco Ltd. | 10,787 | $432.5K | 0.00% | −100,375−90.3% | Reduced |
| Vanguard Global Advisers, LLC | 11,191 | $448.6K | 0.00% | +11,191 | New |
| Kennedy Capital Management, Inc. | 12,284 | $492.5K | 0.01% | +5,532+81.9% | Added |
| Longaeva Partners L.P. | 12,693 | $508.9K | 0.02% | −67,036−84.1% | Reduced |
| Deutsche Bank AG | 13,249 | $531.2K | 0.00% | +3,220+32.1% | Added |
| Walleye Capital LLC | 15,097 | $605.2K | 0.00% | +15,097 | New |
| Squarepoint Ops LLC | 15,217 | $610.0K | 0.00% | −1,143−7.0% | Reduced |
| Alliancebernstein L.P. | 16,410 | $675.1K | 0.00% | +790+5.1% | Added |
| Citigroup Inc | 18,058 | $723.9K | 0.00% | +12,873+248.3% | Added |
| Rhumbline Advisers | 18,308 | $734.0K | 0.00% | +614+3.5% | Added |
| Barclays PLC | 18,385 | $737.1K | 0.00% | −29,787−61.8% | Reduced |
| Rafferty Asset Management, LLC | 22,137 | $887.5K | 0.00% | −2,553−10.3% | Reduced |
| XTX Topco Ltd | 23,551 | $944.2K | 0.02% | +18,625+378.1% | Added |
| Nuveen, LLC | 23,734 | $951.5K | 0.00% | 00.0% | Unchanged |
| Maven Securities LTD | 25,000 | $1.00M | 0.06% | +25,000 | New |
| Polen Capital Management LLC | 26,775 | $1.07M | 0.01% | −4,483−14.3% | Reduced |
| Bank of New York Mellon Corp | 33,778 | $1.35M | 0.00% | −1,356−3.9% | Reduced |
| StemPoint Capital LP | 36,540 | $1.46M | 0.28% | +36,540 | New |
| Alps Advisors Inc | 36,628 | $1.47M | 0.01% | −20−0.1% | Reduced |
| Silverarc Capital Management, LLC | 39,417 | $1.58M | 0.19% | −2,043−4.9% | Reduced |
| BNP Paribas Arbitrage, SA | 40,570 | $1.63M | 0.00% | +38,306+1,692.0% | Added |
| Qube Research & Technologies Ltd | 42,242 | $1.69M | 0.00% | +42,242 | New |
| Wellington Management Group LLP | 46,079 | $1.85M | 0.00% | +7,732+20.2% | Added |
| Russell Investments Group, Ltd. | 48,419 | $1.94M | 0.00% | +26,478+120.7% | Added |
| Ishara Investments LP | 49,200 | $1.97M | 1.99% | +49,200 | New |
| 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 |
| Bank of America Corp | 50,870 | $2.04M | 0.00% | +7,303+16.8% | Added |
| Manufacturers Life Insurance Company, The | 64,458 | $2.58M | 0.00% | −4,966−7.2% | Reduced |
| Driehaus Capital Management LLC | 76,633 | $3.07M | 0.02% | −7,217−8.6% | Reduced |
| FMR LLC | 81,395 | $3.26M | 0.00% | +81,011+21,096.6% | Added |
| Ameriprise Financial Inc | 81,974 | $3.29M | 0.00% | −19,669−19.4% | Reduced |
| TD Asset Management Inc | 82,996 | $3.33M | 0.00% | −30,356−26.8% | Reduced |
| Rhenman & Partners Asset Management AB | 87,500 | $3.51M | 0.43% | +87,500 | New |
| Rock Springs Capital Management LP | 99,429 | $3.99M | 0.23% | 00.0% | Unchanged |
| Vanguard Fiduciary Trust Co | 112,175 | $4.50M | 0.00% | +112,175 | New |
| Northern Trust Corp | 116,776 | $4.68M | 0.00% | +4,660+4.2% | Added |
| Artia Global Partners LP | 119,741 | $4.80M | 1.08% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 120,253 | $4.82M | 0.00% | −3,433−2.8% | Reduced |
| Morgan Stanley | 133,023 | $5.33M | 0.00% | +83,147+166.7% | Added |
| GordonMD Global Investments LP | 136,000 | $5.45M | 4.49% | +136,000 | New |
| Alyeska Investment Group, L.P. | 136,222 | $5.46M | 0.02% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 136,549 | $5.47M | 0.01% | +136,549 | New |
| Millennium Management LLC | 140,641 | $5.64M | 0.00% | +60,095+74.6% | Added |
| Superstring Capital Management LP | 141,024 | $5.65M | 4.04% | −39,569−21.9% | Reduced |
| Vanguard Portfolio Management LLC | 142,081 | $5.70M | 0.00% | +142,081 | New |
| UBS Group AG | 147,641 | $5.92M | 0.00% | +58,464+65.6% | Added |
| Adage Capital Partners GP, L.L.C. | 150,000 | $6.01M | 0.01% | +150,000 | New |
| Franklin Resources Inc | 175,483 | $7.04M | 0.00% | 00.0% | Unchanged |
| Kalehua Capital Management LLC | 197,072 | $7.90M | 5.59% | 00.0% | Unchanged |
| Candriam Luxembourg S.C.A. | 236,813 | $9.49M | 0.05% | +236,813 | New |
| Ensign Peak Advisors, Inc | 255,636 | $10.2M | 0.02% | +175,774+220.1% | Added |
| Goldman Sachs Group Inc | 263,174 | $10.6M | 0.00% | +226,905+625.6% | Added |