Sionna Therapeutics, Inc. - SION

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
RA CAPITAL MANAGEMENT, L.P. History No change 9,905,045 397,093 4.21% 4.17% 1 0 0.0% Q1 2026 May 15, 2026
TPG GP A, LLC History Reduced 6,494,962 260,383 7.08% 10.33% 2 -250,000 -3.71% Q1 2026 May 15, 2026
ORBIMED ADVISORS LLC History Reduced 3,530,702 141,545 2.81% 2.99% 3 -30,953 -0.87% Q1 2026 May 15, 2026
VIKING GLOBAL INVESTORS LP History No change 3,195,181 128,094 0.36% 0.35% 4 0 0.0% Q1 2026 May 15, 2026
Atlas Venture Life Science Advisors, LLC History No change 2,995,602 120,093 15.2% 14.24% 5 0 0.0% Q1 2026 May 14, 2026
Enavate Sciences GP, LLC History No change 2,478,030 99,344 28.26% 20.12% 6 0 0.0% Q1 2026 May 15, 2026
JENNISON ASSOCIATES LLC History Added to 1,451,220 58,179 0.04% 0.03% 7 +335,942 30.12% Q1 2026 May 06, 2026
JPMORGAN CHASE & CO History Added to 1,465,014 53,707 0.0% 0.0% 8 +233,195 18.93% Q1 2026 May 13, 2026
BlackRock, Inc. History Added to 1,295,867 51,951 0.0% 0.0% 9 +4,268 0.33% Q1 2026 May 13, 2026
VANGUARD GROUP INC History No change 1,184,951 48,748 0.0% 0.0% 10 0 0.0% Q4 2025 Jan 29, 2026
CITADEL ADVISORS LLC History Added to 1,166,931 46,782 0.01% 0.01% 11 +79,606 7.32% Q1 2026 May 15, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 1,029,497 41,272 0.0% 12 +1,029,497 New Q1 2026 May 15, 2026
DEERFIELD MANAGEMENT COMPANY, L.P. History No change 970,590 38,910 0.46% 0.51% 13 0 0.0% Q1 2026 May 15, 2026
PRICE T ROWE ASSOCIATES INC /MD/ History Reduced 756,376 30,324 0.0% 0.0% 14 -74,997 -9.02% Q1 2026 May 15, 2026
STATE STREET CORP History Added to 756,227 30,317 0.0% 0.0% 15 +62,832 9.06% Q1 2026 May 15, 2026
PERCEPTIVE ADVISORS LLC History Reduced 658,439 26,396 0.52% 0.86% 16 -520,659 -44.16% Q1 2026 May 29, 2026
EVENTIDE ASSET MANAGEMENT, LLC History Added to 645,530 25,875 0.43% 0.41% 17 +6,485 1.01% Q1 2026 May 15, 2026
Aberdeen Group plc History Reduced 564,175 22,617 0.04% 0.05% 18 -275,785 -32.83% Q1 2026 Apr 29, 2026
BAKER BROS. ADVISORS LP History No change 400,000 16,036 0.09% 0.1% 19 0 0.0% Q1 2026 May 15, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 389,872 15,633 0.0% 0.0% 20 +9,830 2.59% Q1 2026 May 15, 2026
Siren, L.L.C. History No change 300,000 12,027 0.33% 0.37% 21 0 0.0% Q1 2026 May 14, 2026
Sio Capital Management, LLC History New 294,340 11,800 1.69% 22 +294,340 New Q1 2026 May 14, 2026
Soleus Capital Management, L.P. History Added to 293,500 11,766 0.48% 0.41% 23 +25,000 9.31% Q1 2026 May 14, 2026
GOLDMAN SACHS GROUP INC History Added to 263,174 10,550 0.0% 0.0% 24 +226,905 625.62% Q1 2026 May 15, 2026
Ensign Peak Advisors, Inc History Added to 255,636 10,248 0.02% 0.01% 25 +175,774 220.1% Q1 2026 May 13, 2026
Candriam S.C.A. History New 236,813 9,493 0.05% 26 +236,813 New Q1 2026 Apr 30, 2026
Kalehua Capital Management LLC History No change 197,072 7,900 6.66% 8.02% 27 0 0.0% Q1 2026 May 15, 2026
FRANKLIN RESOURCES INC History No change 175,483 7,035 0.0% 0.0% 28 0 0.0% Q1 2026 May 13, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C. History New 150,000 6,013 0.01% 29 +150,000 New Q1 2026 May 15, 2026
UBS Group AG History Added to 147,641 5,918 0.0% 0.0% 30 +58,464 65.56% Q1 2026 May 05, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC History New 142,081 5,696 0.0% 31 +142,081 New Q1 2026 May 08, 2026
SUPERSTRING CAPITAL MANAGEMENT LP History Reduced 141,024 5,653 4.04% 3.98% 32 -39,569 -21.91% Q1 2026 May 14, 2026
MILLENNIUM MANAGEMENT LLC History Added to 140,641 5,638 0.0% 0.0% 33 +60,095 74.61% Q1 2026 May 15, 2026
Point72 Asset Management, L.P. History New 136,549 5,474 0.01% 34 +136,549 New Q1 2026 May 15, 2026
Alyeska Investment Group, L.P. History No change 136,222 5,461 0.02% 0.02% 35 0 0.0% Q1 2026 May 15, 2026
GordonMD Global Investments LP History New 136,000 5,452 3.8% 36 +136,000 New Q1 2026 May 15, 2026
MORGAN STANLEY History Added to 133,023 5,332 0.0% 0.0% 37 +83,147 166.71% Q1 2026 May 15, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History Reduced 120,253 4,820 0.0% 0.0% 38 -3,433 -2.78% Q1 2026 May 15, 2026
Artia Global Partners LP History No change 119,741 4,800 0.96% 0.7% 39 0 0.0% Q1 2026 May 15, 2026
NORTHERN TRUST CORP History Added to 116,776 4,681 0.0% 0.0% 40 +4,660 4.16% Q1 2026 May 14, 2026
VANGUARD FIDUCIARY TRUST CO History New 112,175 4,497 0.0% 41 +112,175 New Q1 2026 May 08, 2026
Rock Springs Capital Management LP History No change 99,429 3,986 0.23% 0.21% 42 0 0.0% Q1 2026 May 15, 2026
Rhenman & Partners Asset Management AB History New 87,500 3,507 0.43% 43 +87,500 New Q1 2026 May 14, 2026
TD ASSET MANAGEMENT INC History Reduced 82,996 3,327 0.0% 0.0% 44 -30,356 -26.78% Q1 2026 May 11, 2026
AMERIPRISE FINANCIAL INC History Reduced 81,974 3,286 0.0% 0.0% 45 -19,669 -19.35% Q1 2026 May 15, 2026
FMR LLC History Added to 81,395 3,263 0.0% 0.0% 46 +81,011 21096.61% Q1 2026 May 15, 2026
DRIEHAUS CAPITAL MANAGEMENT LLC History Reduced 76,633 3,072 0.02% 0.02% 47 -7,217 -8.61% Q1 2026 May 15, 2026
MANUFACTURERS LIFE INSURANCE COMPANY, THE History Reduced 64,458 2,584 0.0% 0.0% 48 -4,966 -7.15% Q1 2026 May 15, 2026
BANK OF AMERICA CORP /DE/ History Added to 50,870 2,039 0.0% 0.0% 49 +7,303 16.76% Q1 2026 May 15, 2026
Integral Health Asset Management, LLC History New 50,000 2,004 0.1% 51 +50,000 New Q1 2026 May 15, 2026
SEVEN GRAND MANAGERS, LLC History No change 50,000 2,004 0.13% 0.16% 50 0 0.0% Q1 2026 May 06, 2026
Ishara Investments LP History New 49,200 1,972 1.87% 52 +49,200 New Q1 2026 May 15, 2026
Russell Investments Group, Ltd. History Added to 48,419 1,941 0.0% 0.0% 53 +26,478 120.68% Q1 2026 May 08, 2026
WELLINGTON MANAGEMENT GROUP LLP History Added to 46,079 1,847 0.0% 0.0% 54 +7,732 20.16% Q1 2026 May 15, 2026
Qube Research & Technologies Ltd History New 42,242 1,693 0.0% 55 +42,242 New Q1 2026 May 15, 2026
BNP PARIBAS FINANCIAL MARKETS History Added to 40,570 1,626 0.0% 0.0% 56 +38,306 1691.96% Q1 2026 May 12, 2026
SILVERARC CAPITAL MANAGEMENT, LLC History Reduced 39,417 1,580 0.16% 0.24% 57 -2,043 -4.93% Q1 2026 May 14, 2026
ALPS ADVISORS INC History Reduced 36,628 1,468 0.01% 0.01% 58 -20 -0.05% Q1 2026 May 08, 2026
STEMPOINT CAPITAL LP History New 36,540 1,464 0.28% 59 +36,540 New Q1 2026 May 15, 2026
Bank of New York Mellon Corp History Reduced 33,778 1,354 0.0% 0.0% 60 -1,356 -3.86% Q1 2026 May 05, 2026
POLEN CAPITAL MANAGEMENT LLC History Reduced 26,775 1,073 0.01% 0.01% 61 -4,483 -14.34% Q1 2026 May 14, 2026
Maven Securities LTD History New 25,000 1,002 0.02% 62 +25,000 New Q1 2026 May 15, 2026
Nuveen, LLC History No change 23,734 951 0.0% 0.0% 63 0 0.0% Q1 2026 Apr 30, 2026
XTX Topco Ltd History Added to 23,551 944 0.02% 0.01% 64 +18,625 378.1% Q1 2026 May 15, 2026
Rafferty Asset Management, LLC History Reduced 22,137 887 0.0% 0.0% 65 -2,553 -10.34% Q1 2026 May 15, 2026
BARCLAYS PLC History Reduced 18,385 737 0.0% 0.0% 66 -29,787 -61.83% Q1 2026 May 14, 2026
RHUMBLINE ADVISERS History Added to 18,308 733 0.0% 0.0% 67 +614 3.47% Q1 2026 May 12, 2026
CITIGROUP INC History Added to 18,058 723 0.0% 0.0% 68 +12,873 248.27% Q1 2026 May 11, 2026
ALLIANCEBERNSTEIN L.P. History Added to 16,410 675 0.0% 0.0% 69 +790 5.06% Q1 2026 May 15, 2026
Squarepoint Ops LLC History Reduced 15,217 610 0.0% 0.0% 70 -1,143 -6.99% Q1 2026 May 15, 2026
Walleye Capital LLC History New 15,097 605 0.0% 71 +15,097 New Q1 2026 May 13, 2026
DEUTSCHE BANK AG\ History Added to 13,249 531 0.0% 0.0% 72 +3,220 32.11% Q1 2026 May 06, 2026
Longaeva Partners L.P. History Reduced 12,693 508 0.02% 0.28% 73 -67,036 -84.08% Q1 2026 May 15, 2026
KENNEDY CAPITAL MANAGEMENT LLC History Added to 12,284 492 0.01% 0.01% 74 +5,532 81.93% Q1 2026 May 13, 2026
Vanguard Global Advisers, LLC History New 11,191 448 0.0% 75 +11,191 New Q1 2026 May 08, 2026
Invesco Ltd. History Reduced 10,787 432 0.0% 0.0% 76 -100,375 -90.3% Q1 2026 May 12, 2026
PROFUND ADVISORS LLC History Added to 9,939 398 0.01% 0.01% 77 +726 7.88% Q1 2026 Apr 24, 2026
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. History Added to 9,185 362 0.0% 0.0% 78 +270 3.03% Q1 2026 May 15, 2026
MetLife Investment Management, LLC History No change 8,565 343 0.0% 0.0% 79 0 0.0% Q1 2026 May 14, 2026
China Universal Asset Management Co., Ltd. History Reduced 7,920 317 0.02% 0.03% 80 -2,352 -22.9% Q1 2026 Apr 27, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History New 7,310 293 0.0% 81 +7,310 New Q1 2026 May 15, 2026
ExodusPoint Capital Management, LP History New 7,190 288 0.0% 82 +7,190 New Q1 2026 May 14, 2026
VARCOV Co. History New 6,571 263 0.1% 83 +6,571 New Q1 2026 May 15, 2026
Virtus Investment Advisers, LLC History Added to 6,374 255 0.07% 0.07% 84 +154 2.48% Q1 2026 May 14, 2026
Quarry LP History New 6,304 252 0.05% 85 +6,304 New Q1 2026 May 15, 2026
Hudson Bay Capital Management LP History New 6,180 247 0.0% 86 +6,180 New Q1 2026 May 13, 2026
WELLS FARGO & COMPANY/MN History Reduced 5,894 236 0.0% 0.0% 87 -11,657 -66.42% Q1 2026 May 11, 2026
INTECH INVESTMENT MANAGEMENT LLC History Reduced 5,489 220 0.0% 0.0% 88 -2,100 -27.67% Q1 2026 May 08, 2026
TWO SIGMA INVESTMENTS, LP History Reduced 5,500 220 0.0% 0.0% 89 -900 -14.06% Q1 2026 May 15, 2026
NEW YORK STATE COMMON RETIREMENT FUND History No change 5,300 212 0.0% 0.0% 90 0 0.0% Q1 2026 May 06, 2026
AlphaCentric Advisors LLC History Added to 4,818 193 0.19% 0.11% 91 +2,098 77.13% Q1 2026 May 07, 2026
CIBC Private Wealth Group LLC History No change 4,500 185 0.0% 0.0% 92 0 0.0% Q4 2025 Feb 12, 2026
Police & Firemen's Retirement System of New Jersey History No change 4,232 169 0.0% 0.0% 93 0 0.0% Q1 2026 Apr 29, 2026
LOS ANGELES CAPITAL MANAGEMENT LLC History Reduced 4,116 165 0.0% 0.0% 94 -1,073 -20.68% Q1 2026 May 08, 2026
Cygnus Capital Advisors, LLC History Added to 3,800 152 0.1% 0.07% 95 +1,400 58.33% Q1 2026 May 12, 2026
STRS OHIO History New 2,900 116 0.0% 96 +2,900 New Q1 2026 Apr 24, 2026
Tower Research Capital LLC (TRC) History Added to 2,352 94 0.0% 0.0% 97 +1,223 108.33% Q1 2026 May 15, 2026
Mirae Asset Global Investments Co., Ltd. History Added to 2,328 93 0.0% 0.0% 98 +159 7.33% Q1 2026 May 04, 2026
Legal & General Group Plc History Reduced 1,432 57 0.0% 0.0% 99 -250 -14.86% Q1 2026 May 08, 2026
Ameritas Investment Partners, Inc. History No change 1,302 52 0.0% 0.0% 100 0 0.0% Q1 2026 May 13, 2026
GF FUND MANAGEMENT CO. LTD. History Added to 1,003 40 0.0% 0.0% 101 +127 14.5% Q1 2026 Apr 15, 2026
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM History Reduced 868 34 0.0% 0.0% 102 -120 -12.15% Q1 2026 May 15, 2026
Zurcher Kantonalbank (Zurich Cantonalbank) History New 371 14 0.0% 103 +371 New Q1 2026 May 15, 2026
Steward Partners Investment Advisory, LLC History New 254 10 0.0% 104 +254 New Q1 2026 May 08, 2026
Rockefeller Capital Management L.P. History Added to 241 9 0.0% 0.0% 105 +193 402.08% Q1 2026 May 14, 2026
GAMMA Investing LLC History Added to 238 9 0.0% 0.0% 106 +61 34.46% Q1 2026 Apr 06, 2026
Farther Finance Advisors, LLC History Added to 196 8 0.0% 0.0% 107 +6 3.16% Q1 2026 Apr 07, 2026
Quantbot Technologies LP History New 178 7 0.0% 108 +178 New Q1 2026 May 13, 2026
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC History New 116 4 0.0% 110 +116 New Q1 2026 May 13, 2026
Sterling Capital Management LLC History No change 105 4 0.0% 0.0% 109 0 0.0% Q1 2026 Apr 22, 2026
US BANCORP \DE\ History Reduced 51 2 0.0% 0.0% 111 -14 -21.54% Q1 2026 May 14, 2026
CWM, LLC History Reduced 67 2 0.0% 0.0% 112 -13 -16.25% Q1 2026 May 14, 2026
ROYAL BANK OF CANADA History Reduced 30 1 0.0% 0.0% 113 -459 -93.87% Q1 2026 May 15, 2026
Caitong International Asset Management Co., Ltd History New 36 1 0.0% 116 +36 New Q1 2026 May 11, 2026
Allworth Financial LP History Added to 29 1 0.0% 0.0% 114 +1 3.57% Q1 2026 May 14, 2026
Hughes Financial Services, LLC History Added to 26 1 0.0% 0.0% 115 +1 4.0% Q1 2026 Apr 29, 2026
SG Americas Securities, LLC History Closed out 0 0 0.0% -10,691 -100.0% Q1 2026 Apr 16, 2026
AMERICAN CENTURY COMPANIES INC History Closed out 0 0 0.0% -6,180 -100.0% Q1 2026 May 15, 2026
DARK FOREST CAPITAL MANAGEMENT LP History Closed out 0 0 0.01% -5,991 -100.0% Q1 2026 May 15, 2026
D. E. Shaw & Co., Inc. History Closed out 0 0 0.0% -5,742 -100.0% Q1 2026 May 15, 2026
ProShare Advisors LLC History Closed out 0 0 0.0% -4,903 -100.0% Q1 2026 Apr 24, 2026
BALYASNY ASSET MANAGEMENT L.P. History Closed out 0 0 0.0% -1,406 -100.0% Q1 2026 May 15, 2026
AMALGAMATED BANK History Closed out 0 0 0.0% -504 -100.0% Q1 2026 May 08, 2026
Daiwa Securities Group Inc. History Closed out 0 0 0.0% -149 -100.0% Q1 2026 May 13, 2026
Aster Capital Management (DIFC) Ltd History Closed out 0 0 0.0% -37 -100.0% Q1 2026 May 13, 2026
SIGNATUREFD, LLC History New 24 0 +24 New Q1 2026 Apr 07, 2026
Fortitude Family Office, LLC History New 15 0 +15 New Q1 2026 Apr 15, 2026
PNC FINANCIAL SERVICES GROUP, INC. History Added to 16 0 +11 220.0% Q1 2026 May 08, 2026
Root Financial Partners, LLC History New 10 0 +10 New Q1 2026 Apr 24, 2026
EverSource Wealth Advisors, LLC History Added to 23 0 +3 15.0% Q1 2026 May 15, 2026
Covestor Ltd History New 3 0 +3 New Q1 2026 May 05, 2026
MAI Capital Management History New 2 0 +2 New Q1 2026 May 15, 2026
ROTHSCHILD INVESTMENT LLC History No change 1 0 0 0.0% Q1 2026 May 07, 2026