RPAM
SION

Rhenman & Partners Asset Management’s Sionna Therapeutics SION Stock Holding History

Rhenman & Partners Asset Management’s Portfolio SION Stock Details SION Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$3.51M Buy
+87,500
New +$3.34M 0.43% 68

Other funds holding SION

RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
TGA
TPG GP A Fort Worth, Texas $3.68B AUM 14.99% 1-Year Est. Return
O
OrbiMed New York $5.05B AUM 125.28% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
ES
Enavate Sciences Menlo Park, California $352M AUM 220.14% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $145B AUM 34.61% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Rhenman & Partners Asset Management's SION Position: Q1 2026 in Review

Rhenman & Partners Asset Management opened a new position in Sionna Therapeutics (SION) in Q1 2026: 87,500 shares worth $3.51M. The stake represents 0.43% of the portfolio and ranks #68 among its holdings.

122 funds tracked by Wall St. Rank hold SION as of Q1 2026.

  • Rhenman & Partners Asset Management held 87,500 shares of Sionna Therapeutics worth $3.51M as of Q1 2026.
  • Sionna Therapeutics was a new Rhenman & Partners Asset Management position in Q1 2026.
  • Sionna Therapeutics made up 0.43% of Rhenman & Partners Asset Management's portfolio in Q1 2026, its #68 holding.
  • 122 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q1 2026.

Based on Rhenman & Partners Asset Management's 13F filing for Q1 2026, filed 14 May 2026.