SION

Sionna Therapeutics, Inc.

Pharmaceutical Preparations · SIC 2834CIK 2036042Held by 7 tracked managersEDGAR filings ↗10-K/10-Q ↗

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7 managers · Q2 2026 13F

13F bookWeight

RA Capital Management

RA Capital ManagementPosition history →

3.8%

—

$435.7M

$11.51B13F book · 2026-06-30

OrbiMed Advisors

OrbiMed AdvisorsPosition history →

2.1%

(27.6%)

$112.4M

$5.25B13F book · 2026-06-30

Viking Global Investors

Andreas HalvorsenPosition history →

0.40%

—

$140.6M

$35.08B13F book · 2026-06-30

Deerfield Management Company

Deerfield Management CompanyPosition history →

0.31%

(29.8%)

$30.0M

$9.59B13F book · 2026-06-30

Adage Capital Management

Adage Capital ManagementPosition history →

0.10%

+966.7%

$70.4M

$71.32B13F book · 2026-06-30

Baker Bros. Advisors

Baker Bros. AdvisorsPosition history →

0.09%

—

$17.6M

$19.96B13F book · 2026-06-30

Alps Advisors

Alps AdvisorsPosition history →

0.01%

+24.3%

$2.0M

$21.33B13F book · 2026-06-30

Weight = position value ÷ the manager's total 13F long-equity value in the same filing — one definition for every row. “1st obs.” marks a position with no earlier stored 13F to compare against — it is not shown as a purchase.