ZP
SION

Zimmer Partners’s Sionna Therapeutics SION Stock Holding History

Zimmer Partners’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
2025
Q2 		– Sell
-237,500
Closed -$2.48M – 221
2025
Q1 		$2.48M Buy
+237,500
New +$3.88M 0.05% 144

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
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return
ES
Enavate Sciences Menlo Park, California $352M AUM 220.14% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
PA
Perceptive Advisors New York $5.12B AUM 314.02% 1-Year Est. Return
B
Braidwell Stamford, Connecticut $3B AUM 46.72% 1-Year Est. Return
DM
Deerfield Management New York $8.48B AUM 99.04% 1-Year Est. Return

Zimmer Partners's SION Position: Q2 2025 in Review

Zimmer Partners sold out of Sionna Therapeutics (SION) in Q2 2025, closing a stake of 237,500 shares — an estimated $2.48M sold.

Zimmer Partners first reported a position in SION in Q1 2025 and held it in 1 quarter. The position peaked at $2.48M in Q1 2025. 65 funds tracked by Wall St. Rank hold SION as of Q2 2025.

  • Zimmer Partners reported no remaining Sionna Therapeutics position as of Q2 2025 after selling out during the quarter.
  • Zimmer Partners sold 237,500 Sionna Therapeutics shares in Q2 2025, an estimated $2.48M.
  • Zimmer Partners first reported a position in Sionna Therapeutics in Q1 2025 and held it in 1 quarter.
  • Zimmer Partners's Sionna Therapeutics position peaked at $2.48M in Q1 2025.
  • 65 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q2 2025.

Based on Zimmer Partners's 13F filing for Q2 2025, filed 14 Aug 2025.