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Hedge Funds Tracker

SION

Sionna Therapeutics, Inc.
Funds Buying10
Funds Selling8
# Funds Holding18
Total Value Held$434.4M

Current Holders

FundSharesValue% of PortfolioAs OfLatest MoveLatest Share Change
Viking Global Investors3,195,181$140.6M0%2026-06-30ADDED+242,427
OrbiMed Advisors2,555,877$112.4M2%2026-06-30TRIMMED-974,825
Adage Capital Partners1,600,000$70.4M0%2026-06-30ADDED+1,450,000
Citadel Advisors1,156,036$50.9M0%2026-06-30TRIMMED-10,895
Geode Capital Management457,145$20.1M0%2026-06-30ADDED+67,273
Millennium Management325,333$14.3M0%2026-06-30ADDED+184,692
Qube Research & Technologies140,309$6.2M0%2026-06-30ADDED+98,067
Charles Schwab Investment Management129,753$5.7M0%2026-06-30ADDED+9,500
D. E. Shaw & Co.101,644$4.5M0%2026-06-30NEW+101,644
Walleye Capital97,347$4.3M0%2026-06-30ADDED+82,250
Point72 Asset Management49,328$2.2M0%2026-06-30TRIMMED-87,221
Polen Capital Management26,775$1.1M0%2026-03-31CLOSED-26,775
Marshall Wace12,599$0.6M0%2026-06-30NEW+12,599
Renaissance Technologies14,600$0.4M0%2025-09-30CLOSED-14,600
Hudson Bay Capital Management6,180$0.2M0%2026-03-31CLOSED-6,180
Squarepoint Ops5,415$0.2M0%2026-06-30TRIMMED-9,802
Two Sigma Investments5,500$0.2M0%2026-03-31CLOSED-5,500
Verition Fund Management5,000$0.2M0%2026-06-30NEW+5,000

Move History

QuarterFundActionPrev SharesNew SharesValue Change
2026-03-31 → 2026-06-30Citadel AdvisorsTRIMMED1,166,9311,156,036$4.1M
2026-03-31 → 2026-06-30Point72 Asset ManagementTRIMMED136,54949,328-$3.3M
2026-03-31 → 2026-06-30D. E. Shaw & Co.NEW0101,644$4.5M
2026-03-31 → 2026-06-30Two Sigma InvestmentsCLOSED5,5000-$0.2M
2026-03-31 → 2026-06-30Millennium ManagementADDED140,641325,333$8.7M
2026-03-31 → 2026-06-30Adage Capital PartnersADDED150,0001,600,000$64.4M
2026-03-31 → 2026-06-30Marshall WaceNEW012,599$0.6M
2026-03-31 → 2026-06-30Polen Capital ManagementCLOSED26,7750-$1.1M
2026-03-31 → 2026-06-30Geode Capital ManagementADDED389,872457,145$4.5M
2026-03-31 → 2026-06-30Charles Schwab Investment ManagementADDED120,253129,753$0.9M
2026-03-31 → 2026-06-30OrbiMed AdvisorsTRIMMED3,530,7022,555,877-$29.1M
2026-03-31 → 2026-06-30Verition Fund ManagementNEW05,000$0.2M
2026-03-31 → 2026-06-30Walleye CapitalADDED15,09797,347$3.7M
2026-03-31 → 2026-06-30Squarepoint OpsTRIMMED15,2175,415-$0.4M
2026-03-31 → 2026-06-30Qube Research & TechnologiesADDED42,242140,309$4.5M
2026-03-31 → 2026-06-30Hudson Bay Capital ManagementCLOSED6,1800-$0.2M
2025-12-31 → 2026-03-31Citadel AdvisorsADDED1,087,3251,166,931$2.0M
2025-12-31 → 2026-03-31Point72 Asset ManagementNEW0136,549$5.5M
2025-12-31 → 2026-03-31D. E. Shaw & Co.CLOSED5,7420-$0.2M
2025-12-31 → 2026-03-31Two Sigma InvestmentsTRIMMED6,4005,500-$0.0M
2025-12-31 → 2026-03-31Millennium ManagementADDED80,546140,641$2.3M
2025-12-31 → 2026-03-31Adage Capital PartnersNEW0150,000$6.0M
2025-12-31 → 2026-03-31Polen Capital ManagementTRIMMED31,25826,775-$0.2M
2025-12-31 → 2026-03-31Geode Capital ManagementADDED380,042389,872-$0.0M
2025-12-31 → 2026-03-31Charles Schwab Investment ManagementTRIMMED123,686120,253-$0.3M
2025-12-31 → 2026-03-31OrbiMed AdvisorsTRIMMED3,561,6553,530,702-$5.0M
2025-12-31 → 2026-03-31Walleye CapitalNEW015,097$0.6M
2025-12-31 → 2026-03-31Squarepoint OpsTRIMMED16,36015,217-$0.1M
2025-12-31 → 2026-03-31Qube Research & TechnologiesNEW042,242$1.7M
2025-12-31 → 2026-03-31Hudson Bay Capital ManagementNEW06,180$0.2M
2025-09-30 → 2025-12-31Renaissance TechnologiesCLOSED14,6000-$0.4M
2025-09-30 → 2025-12-31Citadel AdvisorsADDED35,9231,087,325$43.7M
2025-09-30 → 2025-12-31D. E. Shaw & Co.NEW05,742$0.2M
2025-09-30 → 2025-12-31Two Sigma InvestmentsNEW06,400$0.3M
2025-09-30 → 2025-12-31Millennium ManagementTRIMMED214,08580,546-$3.0M
2025-09-30 → 2025-12-31Marshall WaceCLOSED30,1030-$0.9M
2025-09-30 → 2025-12-31Geode Capital ManagementADDED316,564380,042$6.3M
2025-09-30 → 2025-12-31Charles Schwab Investment ManagementADDED111,496123,686$1.8M
2025-09-30 → 2025-12-31OrbiMed AdvisorsTRIMMED3,704,9593,561,655$37.6M
2025-09-30 → 2025-12-31Squarepoint OpsADDED10,16216,360$0.4M
2025-06-30 → 2025-09-30Renaissance TechnologiesTRIMMED26,00014,600-$0.0M
2025-06-30 → 2025-09-30Citadel AdvisorsTRIMMED129,91235,923-$1.2M
2025-06-30 → 2025-09-30Millennium ManagementADDED14,034214,085$6.1M
2025-06-30 → 2025-09-30Marshall WaceNEW030,103$0.9M
2025-06-30 → 2025-09-30Polen Capital ManagementADDED16,97531,258$0.6M
2025-06-30 → 2025-09-30Geode Capital ManagementADDED289,275316,564$4.3M
2025-06-30 → 2025-09-30Charles Schwab Investment ManagementADDED92,832111,496$1.7M
2025-06-30 → 2025-09-30Squarepoint OpsNEW010,162$0.3M
2025-03-31 → 2025-06-30Renaissance TechnologiesNEW026,000$0.5M
2025-03-31 → 2025-06-30Citadel AdvisorsTRIMMED326,500129,912-$1.2M
2025-03-31 → 2025-06-30Viking Global InvestorsADDED2,952,7543,195,181$24.6M
2025-03-31 → 2025-06-30Two Sigma InvestmentsCLOSED11,7150-$0.1M
2025-03-31 → 2025-06-30Millennium ManagementTRIMMED179,07214,034-$1.6M
2025-03-31 → 2025-06-30Marshall WaceCLOSED12,1880-$0.1M
2025-03-31 → 2025-06-30Polen Capital ManagementNEW016,975$0.3M
2025-03-31 → 2025-06-30Geode Capital ManagementADDED135,563289,275$3.6M
2025-03-31 → 2025-06-30Charles Schwab Investment ManagementADDED64,64492,832$0.9M
2025-03-31 → 2025-06-30Squarepoint OpsCLOSED33,9640-$0.4M
2024-12-31 → 2025-03-31Citadel AdvisorsNEW0326,500$3.4M
2024-12-31 → 2025-03-31Viking Global InvestorsNEW02,952,754$30.9M
2024-12-31 → 2025-03-31Two Sigma InvestmentsNEW011,715$0.1M
2024-12-31 → 2025-03-31Millennium ManagementNEW0179,072$1.9M
2024-12-31 → 2025-03-31Marshall WaceNEW012,188$0.1M
2024-12-31 → 2025-03-31Geode Capital ManagementNEW0135,563$1.4M
2024-12-31 → 2025-03-31Charles Schwab Investment ManagementNEW064,644$0.7M
2024-12-31 → 2025-03-31OrbiMed AdvisorsNEW03,704,959$38.8M
2024-12-31 → 2025-03-31Squarepoint OpsNEW033,964$0.4M