ACM
SION

Aster Capital Management’s Sionna Therapeutics SION Stock Holding History

Aster Capital 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 		– Sell
-37
Closed -$1.52K – 1438
2025
Q4 		$1.52K Sell
37
-372
-91% -$14.1K ﹤0.01% 983
2025
Q3 		$12K Buy
+409
New +$8.9K 0.01% 722
2025
Q2 		– Sell
-14,757
Closed -$203K – 1667
2025
Q1 		$203K Buy
+14,757
New +$241K 0.04% 483

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

Aster Capital Management's SION Position: Q1 2026 in Review

Aster Capital Management sold out of Sionna Therapeutics (SION) in Q1 2026, closing a stake of 37 shares — an estimated $1.52K sold.

Aster Capital Management first reported a position in SION in Q1 2025 and held it in 3 quarters. The position peaked at $203K in Q1 2025. 122 funds tracked by Wall St. Rank hold SION as of Q1 2026.

  • Aster Capital Management reported no remaining Sionna Therapeutics position as of Q1 2026 after selling out during the quarter.
  • Aster Capital Management sold 37 Sionna Therapeutics shares in Q1 2026, an estimated $1.52K.
  • Aster Capital Management first reported a position in Sionna Therapeutics in Q1 2025 and held it in 3 quarters.
  • Aster Capital Management's Sionna Therapeutics position peaked at $203K in Q1 2025.
  • 122 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q1 2026.

Based on Aster Capital Management's 13F filing for Q1 2026, filed 13 May 2026.