TD Asset Management
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TD Asset Management’s Sionna Therapeutics SION Stock Holding History

TD 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
Q2 		$2.08M Sell
47,396
-35,600
-43% -$1.42M ﹤0.01% 962
2026
Q1 		$3.33M Sell
82,996
-30,356
-27% -$1.16M ﹤0.01% 867
2025
Q4 		$4.66M Buy
113,352
+26,270
+30% +$996K ﹤0.01% 812
2025
Q3 		$2.56M Buy
87,082
+37,116
+74% +$807K ﹤0.01% 915
2025
Q2 		$867K Sell
49,966
-5,400
-10% -$70.8K ﹤0.01% 1079
2025
Q1 		$579K Buy
+55,366
New +$905K ﹤0.01% 1132

Other funds holding SION

RA Capital Management
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
TPG GP A
TPG GP A Fort Worth, Texas $5B AUM 58.56% 1-Year Est. Return
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

TD Asset Management's SION Position: Q2 2026 in Review

TD Asset Management reduced its Sionna Therapeutics (SION) stake by 43% in Q2 2026, selling an estimated $1.42M and leaving 47,396 shares worth $2.08M. The position accounts for ﹤0.01% of the portfolio, ranked #962.

TD Asset Management first reported a position in SION in Q1 2025 and has held it in 6 quarters since. The position peaked at $4.66M in Q4 2025. 146 funds tracked by Wall St. Rank hold SION as of Q2 2026.

  • TD Asset Management held 47,396 shares of Sionna Therapeutics worth $2.08M as of Q2 2026.
  • TD Asset Management sold 35,600 Sionna Therapeutics shares in Q2 2026, an estimated $1.42M.
  • Sionna Therapeutics made up ﹤0.01% of TD Asset Management's portfolio in Q2 2026, its #962 holding.
  • TD Asset Management first reported a position in Sionna Therapeutics in Q1 2025 and has held it in 6 quarters since.
  • TD Asset Management's Sionna Therapeutics position peaked at $4.66M in Q4 2025.
  • 146 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q2 2026.

Based on TD Asset Management's 13F filing for Q2 2026, filed 4 Aug 2026.