GF Fund Management
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GF Fund Management’s Sionna Therapeutics SION Stock Holding History

GF Fund 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
Q2 		$41.6K Sell
946
-57
-6% -$2.28K ﹤0.01% 409
2026
Q1 		$40.2K Buy
1,003
+127
+14% +$4.85K ﹤0.01% 424
2025
Q4 		$36K Buy
+876
New +$33.2K ﹤0.01% 437

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TPG GP A
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Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.1B AUM 21.36% 1-Year Est. Return
Atlas Venture Life Science Advisors
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
OrbiMed
OrbiMed New York $5.4B AUM 163.13% 1-Year Est. Return
Enavate Sciences
Enavate Sciences Menlo Park, California $345M AUM 134.64% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return

GF Fund Management's SION Position: Q2 2026 in Review

GF Fund Management reduced its Sionna Therapeutics (SION) stake by 5.7% in Q2 2026, selling an estimated $2.28K and leaving 946 shares worth $41.6K. The position accounts for ﹤0.01% of the portfolio, ranked #409.

GF Fund Management first reported a position in SION in Q4 2025 and has held it in 3 quarters since. 146 funds tracked by Wall St. Rank hold SION as of Q2 2026.

  • GF Fund Management held 946 shares of Sionna Therapeutics worth $41.6K as of Q2 2026.
  • GF Fund Management sold 57 Sionna Therapeutics shares in Q2 2026, an estimated $2.28K.
  • Sionna Therapeutics made up ﹤0.01% of GF Fund Management's portfolio in Q2 2026, its #409 holding.
  • GF Fund Management first reported a position in Sionna Therapeutics in Q4 2025 and has held it in 3 quarters since.
  • 146 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q2 2026.

Based on GF Fund Management's 13F filing for Q2 2026, filed 7 Aug 2026.