13F

Stock

Sionna Therapeutics, Inc.

SION · held by 122 managers

Reported value

$1.78B

Holders

122

+28 new · −9 exited

Holders’ est. mark

−$46.7M

Price effect on 90 books still in the name

Largest holder

$397.1M

RA CAPITAL MANAGEMENT, L.P.

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
RA CAPITAL MANAGEMENT, L.P.9.91M$397.1M−$10.4MCut−$10.4M
TPG GP A, LLC6.49M$260.4M−$6.82MCut−$17.1M
ORBIMED ADVISORS LLC3.53M$141.5M−$3.71MCut−$4.98M
Viking Global3.2M$128.1M−$3.35MCut−$3.35M
Atlas Venture Life Science Advisors, LLC3M$120.1M−$3.15MCut−$3.15M
ENAVATE SCIENCES GP, LLC2.48M$99.3M−$2.6MCut−$2.6M
JENNISON ASSOCIATES LLC1.45M$58.2M−$1.17MAdded$12.3M
JPMORGAN CHASE & CO1.47M$53.7M−$5.52MAdded$3.03M
BlackRock, Inc.1.3M$52M−$1.36MCut−$1.19M
Citadel1.17M$46.8M−$1.14MAdded$2.05M
VANGUARD CAPITAL MANAGEMENT LLC1.03M$41.3MHeld
DEERFIELD MANAGEMENT COMPANY, L.P.970.6K$38.9M−$1.02MCut−$1.02M
State Street756.2K$30.3M−$728.1KAdded$1.79M
PERCEPTIVE ADVISORS LLC658.4K$26.4M−$691.4KCut−$22.1M
EVENTIDE ASSET MANAGEMENT, LLC645.5K$25.9M−$674.4KCut−$414.4K
Aberdeen Group plc564.2K$22.6M−$592.4KCut−$11.9M
BAKER BROS. ADVISORS LP400K$16M−$420KCut−$420K
GEODE CAPITAL MANAGEMENT, LLC389.9K$15.6M−$399.1KCut−$4.88K
Siren, L.L.C.300K$12M−$315KCut−$315K
Sio Capital Management, LLC294.3K$11.8MNew
Soleus Capital Management, L.P.293.5K$11.8M−$281.9KAdded$720.3K
GOLDMAN SACHS GROUP INC263.2K$10.6M−$38.1KAdded$9.06M
Ensign Peak Advisors, Inc255.6K$10.2M−$83.9KAdded$6.96M
Candriam S.C.A.236.8K$9.49MNew
Kalehua Capital Management LLC197.1K$7.9M−$206.9KCut−$206.9K
FRANKLIN RESOURCES INC175.5K$7.04M−$184.3KCut−$184.3K
ADAGE CAPITAL PARTNERS GP, L.L.C.150K$6.01MNew
UBS Group AG147.6K$5.92M−$93.6KAdded$2.25M
VANGUARD PORTFOLIO MANAGEMENT LLC142.1K$5.7MHeld
SUPERSTRING CAPITAL MANAGEMENT LP141K$5.65M−$148.1KCut−$1.78M
MILLENNIUM MANAGEMENT LLC140.6K$5.64M−$84.6KAdded$2.32M
Point72 Asset Management, L.P.136.5K$5.47MNew
Alyeska Investment Group, L.P.136.2K$5.46M−$143KCut−$143K
GordonMD Global Investments LP136K$5.45MNew
MORGAN STANLEY133K$5.33M−$52.4KAdded$3.28M
CHARLES SCHWAB INVESTMENT MANAGEMENT INC120.3K$4.82M−$126.3KCut−$267.5K
Artia Global Partners LP119.7K$4.8M−$125.7KCut−$125.7K
NORTHERN TRUST CORP116.8K$4.68M−$117.7KAdded$69.1K
VANGUARD FIDUCIARY TRUST CO112.2K$4.5MHeld
Rock Springs Capital Management LP99.4K$3.99M−$104.4KCut−$104.4K
Rhenman & Partners Asset Management AB87.5K$3.51MNew
TD Asset Management Inc83K$3.33M−$87.1KCut−$1.34M
AMERIPRISE FINANCIAL INC82K$3.29M−$86.1KCut−$895.3K
Fidelity81.4K$3.26M−$403Added$3.25M
Driehaus Capital Management LLC76.6K$3.07M−$80.5KCut−$377.4K
MANUFACTURERS LIFE INSURANCE COMPANY, THE64.5K$2.58M−$82.6KCut−$288K
BANK OF AMERICA CORP /DE/50.9K$2.04M−$45.7KAdded$247K
Integral Health Asset Management, LLC50K$2MNew
SEVEN GRAND MANAGERS, LLC50K$2M−$52.5KCut−$52.5K
Ishara Investments LP49.2K$1.97MNew
Russell Investments Group, Ltd.48.4K$1.94M−$23.1KAdded$1.04M
WELLINGTON MANAGEMENT GROUP LLP46.1K$1.85M−$40.3KAdded$269.7K
Qube Research & Technologies Ltd42.2K$1.69MNew
BNP PARIBAS FINANCIAL MARKETS40.6K$1.63M−$2.38KAdded$1.53M
SILVERARC CAPITAL MANAGEMENT, LLC39.4K$1.58M−$41.4KCut−$125.4K
ALPS ADVISORS INC36.6K$1.47M−$38.5KCut−$39.3K
STEMPOINT CAPITAL LP36.5K$1.46MNew
Bank of New York Mellon Corp33.8K$1.35M−$35.5KCut−$91.3K
POLEN CAPITAL MANAGEMENT LLC26.8K$1.07M−$28.1KCut−$212.5K
Maven Securities LTD25K$1MNew
Nuveen, LLC23.7K$951.5K−$24.9KCut−$24.9K
XTX Topco Ltd23.6K$944.2K−$5.17KAdded$741.5K
Rafferty Asset Management, LLC22.1K$887.5K−$23.2KCut−$128.3K
BARCLAYS PLC18.4K$737.1K−$19.3KCut−$1.24M
RHUMBLINE ADVISERS18.3K$734K−$18.6KAdded$6.03K
CITIGROUP INC18.1K$723.9K−$5.44KAdded$510.6K
ALLIANCEBERNSTEIN L.P.16.4K$675.1K−$1Added$32.5K
Squarepoint Ops LLC15.2K$610K−$16KCut−$63K
Walleye Capital LLC15.1K$605.2KNew
DEUTSCHE BANK AG\13.2K$531.2K−$10.5KAdded$118.6K
Longaeva Partners L.P.12.7K$508.9K−$13.3KCut−$2.77M
KENNEDY CAPITAL MANAGEMENT LLC12.3K$492.5K−$7.09KAdded$214.7K
Vanguard Global Advisers, LLC11.2K$448.6KHeld
Invesco Ltd.10.8K$432.5K−$11.3KCut−$4.14M
PROFUND ADVISORS LLC9.94K$398.5K−$9.67KAdded$19.4K
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.9.19K$362.9K−$14.8KCut−$4.18K
MetLife Investment Management, LLC8.56K$343.4K−$8.99KCut−$8.99K
China Universal Asset Management Co., Ltd.7.92K$317.5K−$8.32KCut−$105.1K
SUSQUEHANNA INTERNATIONAL GROUP, LLP7.31K$293.1KNew
ExodusPoint Capital Management, LP7.19K$288.2KNew
VARCOV Co.6.57K$263.4KNew
Virtus Investment Advisers, LLC6.37K$255.5K−$6.53KCut−$357
Quarry LP6.3K$252.7KNew
Hudson Bay Capital Management LP6.18K$247.8KNew
WELLS FARGO & COMPANY/MN5.89K$236.3K−$6.19KCut−$485.8K
TWO SIGMA INVESTMENTS, LP5.5K$220.5K−$5.77KCut−$42.8K
INTECH INVESTMENT MANAGEMENT LLC5.49K$220.1K−$5.76KCut−$92.2K
NEW YORK STATE COMMON RETIREMENT FUND5.3K$212.5K−$5.56KCut−$5.57K
AlphaCentric Advisors LLC4.82K$193.2K−$2.86KAdded$81.3K
Police & Firemen's Retirement System of New Jersey4.23K$169.7K−$4.44KCut−$4.44K
LOS ANGELES CAPITAL MANAGEMENT LLC4.12K$165K$8.56KCut−$32.2K
STRS OHIO2.9K$116.3KNew
Tower Research Capital LLC (TRC)2.35K$94.3K−$1.19KAdded$47.8K
Mirae Asset Global Investments Co., Ltd.2.33K$93.3K−$2.28KAdded$4.1K
Legal & General Group Plc1.43K$57.4K−$1.56KCut−$11.8K
Ameritas Investment Partners, Inc.1.3K$52.2K−$1.37KCut−$1.37K
GF FUND MANAGEMENT CO. LTD.1K$40.2K−$920Added$4.17K
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM868$34.8K−$911Cut−$5.85K
PRICE T ROWE ASSOCIATES INC /MD/756.4K$30.3K−$794Cut−$3.88K
Zurcher Kantonalbank (Zurich Cantonalbank)371$14.9KNew
Steward Partners Investment Advisory, LLC254$10.2KNew
Rockefeller Capital Management L.P.241$9.66K−$51Added$7.69K
GAMMA Investing LLC238$9.54K−$186Added$2.26K
Farther Finance Advisors, LLC196$8.1K$30Added$278
Quantbot Technologies LP178$7.14KNew
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC116$4.65KNew
Sterling Capital Management LLC105$4.21K−$111Cut−$111
CWM, LLC67$2.69K$2.68KAdded$2.68K
US BANCORP \DE\51$2.04K−$53Cut−$629
Caitong International Asset Management Co., Ltd36$1.44KNew
Allworth Financial LP29$1.16K−$29Added$11
Hughes Financial Services, LLC26$1.04K−$27Added$13
ROYAL BANK OF CANADA30$1K−$288Cut−$20K
SIGNATUREFD, LLC24$962New
EverSource Wealth Advisors, LLC23$922−$21Added$99
PNC Financial Services Group, Inc.16$641−$6Added$435
Fortitude Family Office, LLC15$601New
Root Financial Partners, LLC10$401New
Cygnus Capital Advisors, LLC3.8K$152−$3Added$53
MAI Capital Management2$81New
ROTHSCHILD INVESTMENT LLC1$40−$1Cut−$1
Covestor Ltd3$0New

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.