Wellington Management Group
SION

Wellington Management Group’s Sionna Therapeutics SION Stock Holding History

Wellington Management Group’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 		$1.85M Buy
46,079
+7,732
+20% +$295K ﹤0.01% 1567
2025
Q4 		$1.58M Sell
38,347
-3,887
-9% -$147K ﹤0.01% 1646
2025
Q3 		$1.24M Buy
+42,234
New +$919K ﹤0.01% 1734

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

Wellington Management Group's SION Position: Q1 2026 in Review

Wellington Management Group increased its Sionna Therapeutics (SION) stake by 20% in Q1 2026, buying an estimated $295K and bringing the position to 46,079 shares worth $1.85M. The position accounts for ﹤0.01% of the portfolio, ranked #1567.

Wellington Management Group first reported a position in SION in Q3 2025 and has held it in 3 quarters since. 122 funds tracked by Wall St. Rank hold SION as of Q1 2026.

  • Wellington Management Group held 46,079 shares of Sionna Therapeutics worth $1.85M as of Q1 2026.
  • Wellington Management Group bought 7,732 Sionna Therapeutics shares in Q1 2026, an estimated $295K.
  • Sionna Therapeutics made up ﹤0.01% of Wellington Management Group's portfolio in Q1 2026, its #1567 holding.
  • Wellington Management Group first reported a position in Sionna Therapeutics in Q3 2025 and has held it in 3 quarters since.
  • 122 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q1 2026.

Based on Wellington Management Group's 13F filing for Q1 2026, filed 15 May 2026.