13F

Stock

Sionna Therapeutics, Inc.

SION · held by 101 managers

Reported value

$1.77B

Holders

101

+0 new · −0 exited

Holders’ est. mark

$551.8K

Price effect on 4 books still in the name

Largest holder

$407.5M

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$407.5MHeld
TPG GP A, LLC6.74M$277.5MHeld
ORBIMED ADVISORS LLC3.56M$146.5MHeld
Viking Global3.2M$131.4MHeld
Atlas Venture Life Science Advisors, LLC3M$123.2MHeld
ENAVATE SCIENCES GP, LLC2.48M$101.9MHeld
BlackRock, Inc.1.29M$53.1MHeld
JPMORGAN CHASE & CO1.23M$50.7MHeld
Vanguard1.18M$48.7MHeld
PERCEPTIVE ADVISORS LLC1.18M$48.5MHeld
JENNISON ASSOCIATES LLC1.12M$45.9MHeld
Citadel1.09M$44.7MHeld
DEERFIELD MANAGEMENT COMPANY, L.P.970.6K$39.9MHeld
Aberdeen Group plc840K$34.6MHeld
State Street693.4K$28.5MHeld
EVENTIDE ASSET MANAGEMENT, LLC639K$26.3MHeld
BAKER BROS. ADVISORS LP400K$16.5MHeld
GEODE CAPITAL MANAGEMENT, LLC380K$15.6MHeld
Siren, L.L.C.300K$12.3MHeld
Soleus Capital Management, L.P.268.5K$11MHeld
Kalehua Capital Management LLC197.1K$8.11MHeld
SUPERSTRING CAPITAL MANAGEMENT LP180.6K$7.43MHeld
FRANKLIN RESOURCES INC175.5K$7.22MHeld
Alyeska Investment Group, L.P.136.2K$5.6MHeld
CHARLES SCHWAB INVESTMENT MANAGEMENT INC123.7K$5.09MHeld
Artia Global Partners LP119.7K$4.93MHeld
TD Asset Management Inc113.4K$4.66MHeld
NORTHERN TRUST CORP112.1K$4.61MHeld
Invesco Ltd.111.2K$4.57MHeld
AMERIPRISE FINANCIAL INC101.6K$4.18MHeld
Rock Springs Capital Management LP99.4K$4.09MHeld
UBS Group AG89.2K$3.67MHeld
Driehaus Capital Management LLC83.8K$3.45MHeld
MILLENNIUM MANAGEMENT LLC80.5K$3.31MHeld
Ensign Peak Advisors, Inc79.9K$3.29MHeld
Longaeva Partners L.P.79.7K$3.28MHeld
MANUFACTURERS LIFE INSURANCE COMPANY, THE69.4K$2.87MHeld
SEVEN GRAND MANAGERS, LLC50K$2.06MHeld
MORGAN STANLEY49.9K$2.05M$267.9KAdded$1.38M
BARCLAYS PLC48.2K$1.98M$207KAdded$1.46M
BANK OF AMERICA CORP /DE/43.6K$1.79M$76.7KAdded$1.6M
SILVERARC CAPITAL MANAGEMENT, LLC41.5K$1.71MHeld
WELLINGTON MANAGEMENT GROUP LLP38.3K$1.58MHeld
ALPS ADVISORS INC36.6K$1.51MHeld
GOLDMAN SACHS GROUP INC36.3K$1.49MHeld
Bank of New York Mellon Corp35.1K$1.45MHeld
POLEN CAPITAL MANAGEMENT LLC31.3K$1.29MHeld
Rafferty Asset Management, LLC24.7K$1.02MHeld
Nuveen, LLC23.7K$976.4KHeld
Russell Investments Group, Ltd.21.9K$902.7KHeld
RHUMBLINE ADVISERS17.7K$727.9KHeld
WELLS FARGO & COMPANY/MN17.6K$722KHeld
Squarepoint Ops LLC16.4K$673KHeld
ALLIANCEBERNSTEIN L.P.15.6K$642.6KHeld
China Universal Asset Management Co., Ltd.10.3K$422.6KHeld
DEUTSCHE BANK AG\10K$412.6KHeld
PROFUND ADVISORS LLC9.21K$379KHeld
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.8.91K$367.1KHeld
MetLife Investment Management, LLC8.56K$352.4KHeld
INTECH INVESTMENT MANAGEMENT LLC7.59K$312.2KHeld
KENNEDY CAPITAL MANAGEMENT LLC6.75K$277.8KHeld
TWO SIGMA INVESTMENTS, LP6.4K$263.3KHeld
Virtus Investment Advisers, LLC6.22K$255.9KHeld
AMERICAN CENTURY COMPANIES INC6.18K$254.2KHeld
DARK FOREST CAPITAL MANAGEMENT LP5.99K$246.5KHeld
D. E. Shaw & Co., Inc.5.74K$236.2KHeld
NEW YORK STATE COMMON RETIREMENT FUND5.3K$218KHeld
CITIGROUP INC5.18K$213.3KHeld
XTX Topco Ltd4.93K$202.7KHeld
ProShare Advisors LLC4.9K$201.7KHeld
LOS ANGELES CAPITAL MANAGEMENT LLC5.19K$197.2KHeld
CIBC Private Wealth Group LLC4.5K$185.1KHeld
Police & Firemen's Retirement System of New Jersey4.23K$174.1KHeld
AlphaCentric Advisors LLC2.72K$111.9KHeld
BNP PARIBAS FINANCIAL MARKETS2.26K$93.1KHeld
Mirae Asset Global Investments Co., Ltd.2.17K$89.2KHeld
Legal & General Group Plc1.68K$69.2KHeld
Balyasny Asset Management L.P.1.41K$57.8KHeld
Ameritas Investment Partners, Inc.1.3K$53.6KHeld
Tower Research Capital LLC (TRC)1.13K$46.4KHeld
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM988$40.6KHeld
GF FUND MANAGEMENT CO. LTD.876$36KHeld
PRICE T ROWE ASSOCIATES INC /MD/831.4K$34.2KHeld
ROYAL BANK OF CANADA489$21KHeld
Fidelity384$15.8KHeld
Farther Finance Advisors, LLC190$7.82KHeld
GAMMA Investing LLC177$7.28KHeld
Sterling Capital Management LLC105$4.32KHeld
US BANCORP \DE\65$2.67KHeld
Rockefeller Capital Management L.P.48$1.98KHeld
Aster Capital Management (DIFC) Ltd37$1.52KHeld
Allworth Financial LP28$1.15K$257Added$504
Hughes Financial Services, LLC25$1.03KHeld
EverSource Wealth Advisors, LLC20$823Held
SG Americas Securities, LLC10.7K$440Held
PNC Financial Services Group, Inc.5$206Held
Cygnus Capital Advisors, LLC2.4K$99Held
ROTHSCHILD INVESTMENT LLC1$41Held
AMALGAMATED BANK504$21Held
Daiwa Securities Group Inc.149$6Held
CWM, LLC80$3Held

Positions as of Q4 2025. 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.