SION · Company research
Sionna Therapeutics, Inc. Common Stock (SION): Ownership & Institutional Holders
Reported institutional positions. Filing dates and sources matter.
RESEARCH CONTEXT
Understand the numbers
Reported institutional positions. Filing dates and sources matter. Use period, currency, units and source fields when interpreting values.
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Ownership & Institutional Holders data
Database-backed records only
| holder name | cik | period end | shares held | market value | ownership percent | shares change | shares change percent | filing date | data source |
|---|---|---|---|---|---|---|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP | 902219 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 23472 | 1032533 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| VANGUARD FIDUCIARY TRUST CO | 933478 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 121442 | 5342234 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Allworth Financial LP | 1555170 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1 | 44 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Driehaus Capital Management LLC | 938206 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 385447 | 16955814 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Federation des caisses Desjardins du Quebec | 2022297 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 210 | 9238 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| BARCLAYS PLC | 312069 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5458 | 240098 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| VANGUARD ASSET MANAGEMENT, Ltd | 1680208 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 9535 | 419445 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Walleye Capital LLC | 1758720 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 97347 | 4282295 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 1368163 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 709 | 31189 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Ishara Investments LP | 2111609 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 123000 | 1350540 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC | 922127 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 35968 | 1582232 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| PNC Financial Services Group, Inc. | 713676 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5 | 220 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| Rockefeller Capital Management L.P. | 1739439 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 66 | 2903 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 1081019 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 653339 | 14852 | — | — | — | Aug 24, 2026 | SEC_13F_DATASET |
| GF FUND MANAGEMENT CO. LTD. | 2057060 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 946 | 41615 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| MERCER GLOBAL ADVISORS INC /ADV | 853758 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 278 | 12229 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Quarry LP | 1965207 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 6750 | 296933 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| EVENTIDE ASSET MANAGEMENT, LLC | 1442891 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 474981 | 20894402 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Artia Global Partners LP | 1937964 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 119741 | 5267407 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| SILVERARC CAPITAL MANAGEMENT, LLC | 1816307 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 42478 | 1868607 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| SEI INVESTMENTS CO | 350894 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5158 | 226900 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Tower Research Capital LLC (TRC) | 1533421 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1279 | 56263 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| ALLIANCEBERNSTEIN L.P. | 1109448 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 25450 | 1020291 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Qube Research & Technologies Ltd | 1729829 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 140309 | 6172193 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Virtus Investment Advisers, LLC | 19481 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 9109 | 400705 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Ikarian Capital, LLC | 1778253 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 107500 | 4728925 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Nuveen, LLC | 1871926 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 37547 | 1651693 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Swiss National Bank | 1582202 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 27000 | 1187730 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| STRS OHIO | 820478 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3500 | 153965 | — | — | — | Jul 30, 2026 | SEC_13F_DATASET |
| US BANCORP \DE\ | 36104 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 104 | 4575 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| PERCEPTIVE ADVISORS LLC | 1224962 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 905000 | 39810950 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Quantbot Technologies LP | 1512991 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1820 | 80062 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| NATIONAL BANK OF CANADA /FI/ | 926171 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2 | 88 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| Kalehua Capital Management LLC | 2106181 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 197072 | 8669197 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Vanguard Global Advisers, LLC | 1811242 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 7852 | 345409 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| GordonMD Global Investments LP | 2039349 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 136000 | 5982640 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 884546 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 129753 | 5707834 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Arax Advisory Partners | 1586767 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 41 | 1804 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| Soleus Capital Management, L.P. | 1802630 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 177687 | 7816451 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| NEW YORK STATE COMMON RETIREMENT FUND | 810265 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 23586 | 1037548 | — | — | — | Jul 29, 2026 | SEC_13F_DATASET |
| STATE STREET CORP | 93751 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1021534 | 44937281 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| Steward Partners Investment Advisory, LLC | 1723397 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 4 | 176 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Ameritas Investment Partners, Inc. | 1055980 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1673 | 73595 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| China Universal Asset Management Co., Ltd. | 1906594 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 7186 | 316112 | — | — | — | Jul 24, 2026 | SEC_13F_DATASET |
| AMERIPRISE FINANCIAL INC | 820027 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 82232 | 3617386 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| FMR LLC | 315066 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 278292 | 12242065 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| FRANKLIN RESOURCES INC | 38777 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 290113 | 12762071 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Maven Securities LTD | 1633046 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 20000 | 879800 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| GOLDMAN SACHS GROUP INC | 886982 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 365993 | 16100032 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Hurley Capital, LLC | 1632844 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 113 | 4971 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| ROTHSCHILD INVESTMENT LLC | 85338 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1 | 44 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | 938076 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5215 | 229408 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| Quadrature Capital Ltd | 1651424 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 26023 | 1144752 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| Trexquant Investment LP | 1633445 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 23810 | 1047402 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Shay Capital LLC | 1723643 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 18000 | 791820 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Hughes Financial Services, LLC | 2054465 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 25 | 1100 | — | — | — | Jul 20, 2026 | SEC_13F_DATASET |
| STEMPOINT CAPITAL LP | 1952142 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 59426 | 2614150 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Fortitude Family Office, LLC | 1950506 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 15 | 660 | — | — | — | Jul 20, 2026 | SEC_13F_DATASET |
| RA CAPITAL MANAGEMENT, L.P. | 1346824 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 9905045 | 435722930 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| UBS Group AG | 1610520 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 116206 | 5111902 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| AXQ CAPITAL, LP | 1916908 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 4597 | 202222 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| Bank of New York Mellon Corp | 1390777 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 30743 | 1352385 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| First Turn Management, LLC | 1993440 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 110493 | 4860587 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Invesco Ltd. | 914208 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 7318 | 321919 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Farther Finance Advisors, LLC | 1992825 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 196 | 8622 | — | — | — | Jul 17, 2026 | SEC_13F_DATASET |
| Point72 Asset Management, L.P. | 1603466 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 49328 | 2169939 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| CONTRAVISORY INVESTMENT MANAGEMENT, INC. | 1365707 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 6 | 264 | — | — | — | Jul 9, 2026 | SEC_13F_DATASET |
| CITADEL ADVISORS LLC | 1423053 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1139874 | 50143057 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| BAKER BROS. ADVISORS LP | 1263508 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 400000 | 17596000 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 8100 | 356319 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Jump Financial, LLC | 1831577 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10473 | 460708 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| State of Wyoming | 1821626 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 804 | 35368 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| VIKING GLOBAL INVESTORS LP | 1103804 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3195181 | 140556012 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| XTX Topco Ltd | 1828301 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 38096 | 1675843 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Russell Investments Group, Ltd. | 1692234 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 20350 | 895196 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| VARCOV Co. | 2078837 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 6418 | 282328 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 222949 | 9807527 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| BlackRock, Inc. | 2012383 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 880122 | 38716567 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| SEVEN GRAND MANAGERS, LLC | 1909126 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 50000 | 2199500 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| BANK OF AMERICA CORP /DE/ | 70858 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 74395 | 3272636 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
Informational research only, not financial advice. Forecasts are uncertain and can be wrong.