Sionna Therapeutics, Inc. - SION

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q2 2026 · Compare: Q1 2026
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 9,905,045 435,722 3.79% 4.21% 1 0 0.0% Q2 2026 Aug 14, 2026
TPG GP A, LLC History No change 6,494,962 285,713 5.71% 7.08% 2 0 0.0% Q2 2026 Aug 14, 2026
VIKING GLOBAL INVESTORS LP History No change 3,195,181 140,556 0.4% 0.36% 3 0 0.0% Q2 2026 Aug 14, 2026
Atlas Venture Life Science Advisors, LLC History No change 2,995,602 131,776 14.95% 15.2% 4 0 0.0% Q2 2026 Aug 13, 2026
ORBIMED ADVISORS LLC History Reduced 2,555,877 112,433 2.08% 2.81% 5 -974,825 -27.61% Q2 2026 Aug 14, 2026
Enavate Sciences GP, LLC History No change 2,478,030 109,008 31.56% 28.26% 6 0 0.0% Q2 2026 Aug 14, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C. History Added to 1,600,000 70,384 0.1% 0.01% 7 +1,450,000 966.67% Q2 2026 Aug 14, 2026
BlackRock, Inc. History Added to 1,474,769 64,875 0.0% 0.0% 8 +178,902 13.81% Q2 2026 Aug 07, 2026
JPMORGAN CHASE & CO History Added to 1,490,508 64,085 0.0% 0.0% 9 +25,494 1.74% Q2 2026 Aug 12, 2026
JENNISON ASSOCIATES LLC History Reduced 1,172,133 51,562 0.03% 0.04% 10 -279,087 -19.23% Q2 2026 Aug 03, 2026
CITADEL ADVISORS LLC History Reduced 1,156,036 50,854 0.01% 0.01% 11 -10,895 -0.93% Q2 2026 Sep 02, 2026
VANGUARD CAPITAL MANAGEMENT LLC History Added to 1,132,001 49,796 0.0% 0.0% 12 +102,504 9.96% Q2 2026 Aug 13, 2026
STATE STREET CORP History Added to 1,021,534 44,937 0.0% 0.0% 13 +265,307 35.08% Q2 2026 Aug 07, 2026
PERCEPTIVE ADVISORS LLC History Added to 905,000 39,810 0.6% 0.52% 14 +246,561 37.45% Q2 2026 Aug 14, 2026
DEERFIELD MANAGEMENT COMPANY, L.P. History Reduced 680,916 29,953 0.31% 0.46% 15 -289,674 -29.85% Q2 2026 Aug 14, 2026
Siren, L.L.C. History Added to 610,515 26,856 0.54% 0.33% 16 +310,515 103.51% Q2 2026 Aug 13, 2026
PRICE T ROWE ASSOCIATES INC /MD/ History Reduced 478,016 21,029 0.0% 0.0% 17 -278,360 -36.8% Q2 2026 Aug 14, 2026
EVENTIDE ASSET MANAGEMENT, LLC History Reduced 474,981 20,894 0.28% 0.43% 18 -170,549 -26.42% Q2 2026 Aug 14, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 457,145 20,113 0.0% 0.0% 19 +67,273 17.26% Q2 2026 Aug 12, 2026
Casdin Capital, LLC History New 400,000 17,596 0.88% 21 +400,000 New Q2 2026 Aug 14, 2026
BAKER BROS. ADVISORS LP History No change 400,000 17,596 0.09% 0.09% 20 0 0.0% Q2 2026 Aug 14, 2026
GOLDMAN SACHS GROUP INC History Added to 388,810 17,103 0.0% 0.0% 22 +125,636 47.74% Q2 2026 Aug 14, 2026
DRIEHAUS CAPITAL MANAGEMENT LLC History Added to 385,447 16,955 0.1% 0.02% 23 +308,814 402.98% Q2 2026 Aug 14, 2026
MILLENNIUM MANAGEMENT LLC History Added to 325,333 14,311 0.01% 0.0% 24 +184,692 131.32% Q2 2026 Aug 14, 2026
FRANKLIN RESOURCES INC History Added to 290,113 12,762 0.0% 0.0% 25 +114,630 65.32% Q2 2026 Aug 13, 2026
Aberdeen Group plc History Reduced 284,138 12,499 0.02% 0.04% 26 -280,037 -49.64% Q2 2026 Jul 31, 2026
FMR LLC History Added to 278,292 12,242 0.0% 0.0% 27 +196,897 241.9% Q2 2026 Aug 13, 2026
Candriam S.C.A. History Reduced 233,208 10,248 0.05% 0.05% 28 -3,605 -1.52% Q2 2026 Aug 13, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC History Added to 222,949 9,807 0.0% 0.0% 29 +80,868 56.92% Q2 2026 Aug 13, 2026
Kalehua Capital Management LLC History No change 197,072 8,669 6.21% 6.66% 30 0 0.0% Q2 2026 Aug 14, 2026
Longaeva Partners L.P. History Added to 196,352 8,637 0.19% 0.02% 31 +183,659 1446.93% Q2 2026 Aug 14, 2026
Artisan Partners Limited Partnership History New 189,498 8,336 0.01% 32 +189,498 New Q2 2026 Aug 13, 2026
Ensign Peak Advisors, Inc History Reduced 184,532 8,117 0.01% 0.02% 33 -71,104 -27.81% Q2 2026 Aug 14, 2026
Soleus Capital Management, L.P. History Reduced 177,687 7,816 0.27% 0.48% 34 -115,813 -39.46% Q2 2026 Aug 11, 2026
NORTHERN TRUST CORP History Added to 154,476 6,795 0.0% 0.0% 35 +37,700 32.28% Q2 2026 Aug 13, 2026
MORGAN STANLEY History Added to 151,047 6,644 0.0% 0.0% 36 +18,024 13.55% Q2 2026 Aug 13, 2026
Sofinnova Investments, Inc. History New 144,432 6,353 0.33% 37 +144,432 New Q2 2026 Aug 14, 2026
Qube Research & Technologies Ltd History Added to 140,309 6,172 0.01% 0.0% 38 +98,067 232.16% Q2 2026 Aug 14, 2026
Alyeska Investment Group, L.P. History No change 136,222 5,992 0.02% 0.02% 39 0 0.0% Q2 2026 Aug 14, 2026
GordonMD Global Investments LP History No change 136,000 5,982 2.89% 3.8% 40 0 0.0% Q2 2026 Aug 14, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History Added to 129,753 5,707 0.0% 0.0% 41 +9,500 7.9% Q2 2026 Aug 14, 2026
Sio Capital Management, LLC History Reduced 127,808 5,622 0.93% 1.69% 42 -166,532 -56.58% Q2 2026 Aug 14, 2026
VANGUARD FIDUCIARY TRUST CO History Added to 121,442 5,342 0.0% 0.0% 43 +9,267 8.26% Q2 2026 Aug 13, 2026
Artia Global Partners LP History No change 119,741 5,267 0.97% 0.96% 44 0 0.0% Q2 2026 Aug 14, 2026
UBS Group AG History Reduced 116,206 5,111 0.0% 0.0% 45 -31,435 -21.29% Q2 2026 Aug 13, 2026
First Turn Management, LLC History New 110,493 4,860 0.52% 46 +110,493 New Q2 2026 Aug 14, 2026
CITIGROUP INC History Added to 110,163 4,846 0.0% 0.0% 47 +92,105 510.05% Q2 2026 Aug 03, 2026
Ikarian Capital, LLC History New 107,500 4,728 0.51% 48 +107,500 New Q2 2026 Aug 14, 2026
D. E. Shaw & Co., Inc. History New 101,644 4,471 0.0% 49 +101,644 New Q2 2026 Aug 14, 2026
Rock Springs Capital Management LP History No change 99,429 4,373 0.21% 0.23% 50 0 0.0% Q2 2026 Aug 14, 2026
Walleye Capital LLC History Added to 97,347 4,282 0.02% 0.0% 51 +82,250 544.81% Q2 2026 Aug 03, 2026
Rhenman & Partners Asset Management AB History Added to 97,100 4,271 0.4% 0.43% 52 +9,600 10.97% Q2 2026 Aug 13, 2026
BANK OF AMERICA CORP /DE/ History Added to 88,908 3,911 0.0% 0.0% 53 +38,038 74.77% Q2 2026 Aug 14, 2026
AMERIPRISE FINANCIAL INC History Added to 82,232 3,617 0.0% 0.0% 54 +258 0.31% Q2 2026 Aug 14, 2026
Integral Health Asset Management, LLC History Added to 75,000 3,299 0.13% 0.1% 55 +25,000 50.0% Q2 2026 Aug 14, 2026
SUPERSTRING CAPITAL MANAGEMENT LP History Reduced 63,156 2,778 1.75% 4.04% 56 -77,868 -55.22% Q2 2026 Aug 14, 2026
STEMPOINT CAPITAL LP History Added to 59,426 2,614 0.45% 0.28% 57 +22,886 62.63% Q2 2026 Aug 14, 2026
DEUTSCHE BANK AG\ History Added to 53,353 2,346 0.0% 0.0% 58 +40,104 302.69% Q2 2026 Aug 07, 2026
SEVEN GRAND MANAGERS, LLC History No change 50,000 2,199 0.09% 0.13% 59 0 0.0% Q2 2026 Aug 14, 2026
Point72 Asset Management, L.P. History Reduced 49,328 2,169 0.0% 0.01% 60 -87,221 -63.88% Q2 2026 Aug 14, 2026
TD ASSET MANAGEMENT INC History Reduced 47,396 2,084 0.0% 0.0% 61 -35,600 -42.89% Q2 2026 Aug 04, 2026
ALPS ADVISORS INC History Added to 45,525 2,002 0.01% 0.01% 62 +8,897 24.29% Q2 2026 Jul 29, 2026
SILVERARC CAPITAL MANAGEMENT, LLC History Added to 42,478 1,868 0.19% 0.16% 63 +3,061 7.77% Q2 2026 Aug 13, 2026
Russell Investments Group, Ltd. History Reduced 42,258 1,858 0.0% 0.0% 64 -6,161 -12.72% Q2 2026 Aug 06, 2026
Bank of New York Mellon Corp History Added to 41,586 1,829 0.0% 0.0% 65 +7,808 23.12% Q2 2026 Aug 06, 2026
Nuveen, LLC History Added to 41,259 1,814 0.0% 0.0% 66 +17,525 73.84% Q2 2026 Aug 11, 2026
XTX Topco Ltd History Added to 38,096 1,675 0.02% 0.02% 67 +14,545 61.76% Q2 2026 Aug 14, 2026
WELLINGTON MANAGEMENT GROUP LLP History Reduced 37,365 1,643 0.0% 0.0% 68 -8,714 -18.91% Q2 2026 Aug 14, 2026
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC History New 35,968 1,582 0.02% 69 +35,968 New Q2 2026 Aug 11, 2026
MANUFACTURERS LIFE INSURANCE COMPANY, THE History Reduced 35,420 1,558 0.0% 0.0% 70 -29,038 -45.05% Q2 2026 Sep 09, 2026
BOOTHBAY FUND MANAGEMENT, LLC History New 32,500 1,429 0.02% 71 +32,500 New Q2 2026 Aug 14, 2026
BNP PARIBAS FINANCIAL MARKETS History Reduced 31,803 1,399 0.0% 0.0% 72 -8,767 -21.61% Q2 2026 Aug 13, 2026
Ishara Investments LP History Added to 123,000 1,350 0.99% 1.87% 73 +73,800 150.0% Q2 2026 Aug 14, 2026
Swiss National Bank History New 27,000 1,187 0.0% 74 +27,000 New Q2 2026 Aug 11, 2026
Quadrature Capital Ltd History New 26,023 1,144 0.01% 75 +26,023 New Q2 2026 Aug 06, 2026
Trexquant Investment LP History New 23,810 1,047 0.01% 76 +23,810 New Q2 2026 Aug 14, 2026
NEW YORK STATE COMMON RETIREMENT FUND History Added to 23,586 1,037 0.0% 0.0% 77 +18,286 345.02% Q2 2026 Jul 29, 2026
ALLIANCEBERNSTEIN L.P. History Added to 25,450 1,020 0.0% 0.0% 78 +9,040 55.09% Q2 2026 Aug 14, 2026
TUDOR INVESTMENT CORP ET AL History New 22,575 993 0.0% 79 +22,575 New Q2 2026 Aug 14, 2026
RHUMBLINE ADVISERS History Added to 22,309 981 0.0% 0.0% 80 +4,001 21.85% Q2 2026 Aug 11, 2026
Maven Securities LTD History Reduced 20,000 879 0.02% 0.02% 81 -5,000 -20.0% Q2 2026 Aug 14, 2026
LOS ANGELES CAPITAL MANAGEMENT LLC History Added to 18,645 820 0.0% 0.0% 82 +14,529 352.99% Q2 2026 Aug 13, 2026
Susquehanna Portfolio Strategies, LLC History New 18,034 793 0.01% 83 +18,034 New Q2 2026 Aug 14, 2026
Shay Capital LLC History New 18,000 791 0.05% 85 +18,000 New Q2 2026 Aug 14, 2026
Rafferty Asset Management, LLC History Reduced 18,004 791 0.0% 0.0% 84 -4,133 -18.67% Q2 2026 Aug 14, 2026
WELLS FARGO & COMPANY/MN History Added to 16,821 739 0.0% 0.0% 86 +10,927 185.39% Q2 2026 Aug 14, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Added to 15,800 695 0.0% 0.0% 87 +8,490 116.14% Q2 2026 Aug 14, 2026
Engineers Gate Manager LP History New 15,603 686 0.01% 88 +15,603 New Q2 2026 Aug 14, 2026
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM History Added to 14,852 653 0.0% 0.0% 89 +13,984 1611.06% Q2 2026 Aug 24, 2026
KENNEDY CAPITAL MANAGEMENT LLC History Added to 12,621 555 0.01% 0.01% 90 +337 2.74% Q2 2026 Aug 14, 2026
MARSHALL WACE, LLP History New 12,599 554 0.0% 91 +12,599 New Q2 2026 Aug 13, 2026
Invesco Ltd. History Added to 12,418 546 0.0% 0.0% 92 +1,631 15.12% Q2 2026 Aug 14, 2026
MetLife Investment Management, LLC History Added to 10,972 482 0.0% 0.0% 93 +2,407 28.1% Q2 2026 Aug 13, 2026
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC History Added to 10,622 467 0.0% 0.0% 94 +10,506 9056.9% Q2 2026 Aug 13, 2026
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. History Added to 10,582 463 0.0% 0.0% 95 +1,397 15.21% Q2 2026 Aug 14, 2026
Jump Financial, LLC History New 10,473 460 0.0% 96 +10,473 New Q2 2026 Aug 13, 2026
VANGUARD ASSET MANAGEMENT, Ltd History New 9,535 419 0.0% 97 +9,535 New Q2 2026 Aug 13, 2026
PROFUND ADVISORS LLC History Reduced 9,140 402 0.01% 0.01% 98 -799 -8.04% Q2 2026 Aug 11, 2026
Virtus Investment Advisers, LLC History Added to 9,109 400 0.09% 0.07% 99 +2,735 42.91% Q2 2026 Aug 11, 2026
Legal & General Group Plc History Added to 9,044 397 0.0% 0.0% 100 +7,612 531.56% Q2 2026 Aug 14, 2026
Vanguard Global Advisers, LLC History Reduced 7,852 345 0.0% 0.0% 101 -3,339 -29.84% Q2 2026 Aug 13, 2026
China Universal Asset Management Co., Ltd. History Reduced 7,186 316 0.02% 0.02% 102 -734 -9.27% Q2 2026 Jul 24, 2026
Quarry LP History Added to 6,750 296 0.02% 0.05% 103 +446 7.07% Q2 2026 Aug 14, 2026
BARCLAYS PLC History Reduced 6,495 285 0.0% 0.0% 104 -11,890 -64.67% Q2 2026 Aug 14, 2026
VARCOV Co. History Reduced 6,418 282 0.11% 0.1% 105 -153 -2.33% Q2 2026 Aug 14, 2026
Jupiter Topco LLC History New 6,400 281 0.0% 106 +6,400 New Q2 2026 Aug 14, 2026
Police & Firemen's Retirement System of New Jersey History Added to 5,438 239 0.0% 0.0% 107 +1,206 28.5% Q2 2026 Jul 23, 2026
Squarepoint Ops LLC History Reduced 5,415 238 0.0% 0.0% 108 -9,802 -64.41% Q2 2026 Aug 14, 2026
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM History New 5,215 229 0.0% 110 +5,215 New Q2 2026 Aug 10, 2026
INTECH INVESTMENT MANAGEMENT LLC History Reduced 5,218 229 0.0% 0.0% 109 -271 -4.94% Q2 2026 Aug 10, 2026
SEI INVESTMENTS CO History New 5,158 226 0.0% 111 +5,158 New Q2 2026 Aug 14, 2026
Verition Fund Management LLC History New 5,000 219 0.0% 112 +5,000 New Q2 2026 Aug 14, 2026
AlphaCentric Advisors LLC History Added to 4,863 213 0.18% 0.19% 113 +45 0.93% Q2 2026 Jul 24, 2026
Jain Global LLC History New 4,780 210 0.0% 114 +4,780 New Q2 2026 Aug 14, 2026
AXQ CAPITAL, LP History New 4,597 202 0.02% 115 +4,597 New Q2 2026 Aug 06, 2026
Vanguard Investments Australia, Ltd. History New 3,490 153 0.0% 117 +3,490 New Q2 2026 Aug 13, 2026
STRS OHIO History Added to 3,500 153 0.0% 0.0% 116 +600 20.69% Q2 2026 Jul 30, 2026
KLP KAPITALFORVALTNING AS History New 3,100 136 0.0% 118 +3,100 New Q2 2026 Aug 12, 2026
Mirae Asset Global Investments Co., Ltd. History Reduced 2,019 88 0.0% 0.0% 119 -309 -13.27% Q2 2026 Jul 22, 2026
Quantbot Technologies LP History Added to 1,820 80 0.0% 0.0% 120 +1,642 922.47% Q2 2026 Aug 12, 2026
Ameritas Investment Partners, Inc. History Added to 1,673 73 0.0% 0.0% 121 +371 28.49% Q2 2026 Aug 13, 2026
Tower Research Capital LLC (TRC) History Reduced 1,279 56 0.0% 0.0% 122 -1,073 -45.62% Q2 2026 Aug 11, 2026
Mitsubishi UFJ Asset Management Co., Ltd. History New 1,000 43 0.0% 123 +1,000 New Q2 2026 Aug 07, 2026
GF FUND MANAGEMENT CO. LTD. History Reduced 946 41 0.0% 0.0% 124 -57 -5.68% Q2 2026 Aug 07, 2026
State of Wyoming History New 804 35 0.0% 125 +804 New Q2 2026 Aug 06, 2026
Zurcher Kantonalbank (Zurich Cantonalbank) History Added to 709 31 0.0% 0.0% 126 +338 91.11% Q2 2026 Aug 11, 2026
ROYAL BANK OF CANADA History Added to 568 25 0.0% 0.0% 127 +538 1793.33% Q2 2026 Aug 14, 2026
NISA INVESTMENT ADVISORS, LLC History New 385 16 0.0% 128 +385 New Q2 2026 Aug 10, 2026
Pacer Advisors, Inc. History New 301 13 0.0% 129 +301 New Q2 2026 Aug 13, 2026
GAMMA Investing LLC History Added to 244 10 0.0% 0.0% 130 +6 2.52% Q2 2026 Jul 07, 2026
Federation des caisses Desjardins du Quebec History New 210 9 0.0% 131 +210 New Q2 2026 Aug 13, 2026
Farther Finance Advisors, LLC History No change 196 8 0.0% 0.0% 132 0 0.0% Q2 2026 Jul 17, 2026
Rockefeller Capital Management L.P. History Reduced 114 5 0.0% 0.0% 133 -127 -52.7% Q2 2026 Aug 13, 2026
Hurley Capital, LLC History New 113 4 0.0% 135 +113 New Q2 2026 Aug 10, 2026
US BANCORP \DE\ History Added to 104 4 0.0% 0.0% 134 +53 103.92% Q2 2026 Aug 12, 2026
Sterling Capital Management LLC History Reduced 65 2 0.0% 0.0% 136 -40 -38.1% Q2 2026 Jul 28, 2026
CWM, LLC History No change 67 2 0.0% 0.0% 137 0 0.0% Q1 2026 May 14, 2026
Arax Advisory Partners History New 41 1 0.0% 141 +41 New Q2 2026 Aug 10, 2026
Bare Financial Services, Inc History New 37 1 0.0% 142 +37 New Q2 2026 Jul 27, 2026
Covestor Ltd History Added to 12 1 0.0% 138 +9 300.0% Q2 2026 Aug 07, 2026
Caitong International Asset Management Co., Ltd History Reduced 31 1 0.0% 0.0% 139 -5 -13.89% Q2 2026 Aug 04, 2026
Hughes Financial Services, LLC History Reduced 25 1 0.0% 0.0% 140 -1 -3.85% Q2 2026 Jul 20, 2026
POLEN CAPITAL MANAGEMENT LLC History Closed out 0 0 0.01% -26,775 -100.0% Q2 2026 Aug 04, 2026
ExodusPoint Capital Management, LP History Closed out 0 0 0.0% -7,190 -100.0% Q2 2026 Aug 14, 2026
Hudson Bay Capital Management LP History Closed out 0 0 0.0% -6,180 -100.0% Q2 2026 Aug 14, 2026
TWO SIGMA INVESTMENTS, LP History Closed out 0 0 0.0% -5,500 -100.0% Q2 2026 Aug 14, 2026
Cygnus Capital Advisors, LLC History Closed out 0 0 0.1% -3,800 -100.0% Q2 2026 Sep 03, 2026
Steward Partners Investment Advisory, LLC History Reduced 4 0 0.0% -250 -98.43% Q2 2026 Aug 13, 2026
Allworth Financial LP History Reduced 1 0 0.0% -28 -96.55% Q2 2026 Aug 11, 2026
SIGNATUREFD, LLC History Closed out 0 0 -24 -100.0% Q2 2026 Jul 23, 2026
PNC FINANCIAL SERVICES GROUP, INC. History Reduced 5 0 -11 -68.75% Q2 2026 Aug 07, 2026
Root Financial Partners, LLC History Closed out 0 0 -10 -100.0% Q2 2026 Jul 29, 2026
SJS Investment Consulting Inc. History New 9 0 +9 New Q2 2026 Jul 22, 2026
CONTRAVISORY INVESTMENT MANAGEMENT, INC. History New 6 0 +6 New Q2 2026 Jul 09, 2026
EverSource Wealth Advisors, LLC History Reduced 20 0 -3 -13.04% Q2 2026 Jul 24, 2026
NATIONAL BANK OF CANADA /FI/ History New 2 0 +2 New Q2 2026 Aug 10, 2026
MAI Capital Management History Closed out 0 0 -2 -100.0% Q2 2026 Aug 14, 2026
ROTHSCHILD INVESTMENT LLC History No change 1 0 0 0.0% Q2 2026 Aug 06, 2026
Fortitude Family Office, LLC History No change 15 0 0 0.0% Q2 2026 Jul 20, 2026