TD Asset Management
SION

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
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

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

TD Asset Management's SION Position: Q1 2026 in Review

TD Asset Management reduced its Sionna Therapeutics (SION) stake by 27% in Q1 2026, selling an estimated $1.16M and leaving 82,996 shares worth $3.33M. The position accounts for ﹤0.01% of the portfolio, ranked #867.

TD Asset Management first reported a position in SION in Q1 2025 and has held it in 5 quarters since. The position peaked at $4.66M in Q4 2025. 122 funds tracked by Wall St. Rank hold SION as of Q1 2026.

  • TD Asset Management held 82,996 shares of Sionna Therapeutics worth $3.33M as of Q1 2026.
  • TD Asset Management sold 30,356 Sionna Therapeutics shares in Q1 2026, an estimated $1.16M.
  • Sionna Therapeutics made up ﹤0.01% of TD Asset Management's portfolio in Q1 2026, its #867 holding.
  • TD Asset Management first reported a position in Sionna Therapeutics in Q1 2025 and has held it in 5 quarters since.
  • TD Asset Management's Sionna Therapeutics position peaked at $4.66M in Q4 2025.
  • 122 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q1 2026.

Based on TD Asset Management's 13F filing for Q1 2026, filed 11 May 2026.