SION
SIONNA THERAPEUTICS INCData as of 2026 Q2 (06-30) · 13F snapshot
Summary
SIONNA THERAPEUTICS INC (SION) is held as common stock by 6 tracked hedge-fund managers, with a combined reported value of ~$223.97M; the largest are Andreas Halvorsen, Ken Griffin, Baker Bros. Advisors. 2 tracked managers also disclosed PUT or CALL positions, reported separately below. This quarter: 1 new, 1 added, 2 trimmed. Data as of 2026 Q2, from public SEC 13F filings, delayed up to ~45 days.
Attention · MediumThis quarter · Mixed
Common-stock holders62 also report options
Congress trades0
Price$5.15vs quarter-end-88.29%
Sectors0
This quarter's moves
Top holderNew1
Added1
Trimmed / sold2
Andreas HalvorsenCommon-stock positions
PUT and CALL disclosures are excluded from these holder counts and values.
Value $140.56M0.4% of portfolio3,195,1812026 Q2
Value $17.60M0.1% of portfolio400,0002026 Q2
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Andreas Halvorsen | $140.56M | 0.4% | Hold |
| Baker Bros. Advisors | $17.60M | 0.1% | Hold |
PUT / CALL disclosures
Reported separately: 13F option values are not common-stock ownership and do not reveal the full strategy or economic exposure.
Value $1.26M— of portfolio28,6002026 Q2
Value $879.8K— of portfolio20,0002026 Q2
Value $369.5K— of portfolio8,4002026 Q2
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Izzy EnglanderPUT | $1.26M | — | — |
| Izzy EnglanderCALL | $879.8K | — | — |
| Ken GriffinPUT | $369.5K | — | — |
Public SEC 13F filings may appear up to 45 days after quarter-end; STOCK Act / OGE trade filings are generally due within 45 days but may be late. Partial data only — research, not investment advice.