SIONNA THERAPEUTICS INC (SION) Institutional Ownership and Insiders Activity
SIONNA THERAPEUTICS INC (SION) is widely held by institutional investors, with 149 firms reporting positions valued at approximately $2.09B based on SEC Form 13F filings for the quarter ended June 30, 2026.
Ra Capital Management, L.P. is the largest disclosed holder, reporting approximately $435.72M in SION holdings in its latest filing.
Recent insider activity includes 6 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.
Institutional Holders
149
Total Reported Value
$2.09B
Largest Holder
Ra Capital Management, L.P.
Largest Position
$435.72M
Insider Transactions (90d)
6
Latest Filing Quarter
Q2 2026
New Institutional Positions
35
Funds Exiting Positions
14
Top Institutional Owners
View all- Ra Capital Management, L.P.$435.72M
- Tpg Gp A, Llc$285.71M
- Viking Global Investors$140.56M
- Atlas Venture Life Science Advisors, Llc$131.78M
- Orbimed Advisors Llc$112.43M
SION News
All news- Ra Capital Management Q2 2026 Portfolio Update: Strategic Shifts in Healthcare Focus
Aug 19, 2026 · valut.ai
- Orbimed Advisors Llc Portfolio Shifts in Q2 2026: Focus on Biotech Gains
Aug 18, 2026 · valut.ai
Related SION Institutional Insights:
- SION 13F Institutional Holders
- SION Superinvestors
- SION Institutional Ownership Changes
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- SION Insider Trading & SEC Form 4 Activity
- SION Articles
- Top Institutional Investor Stock Rankings