Jennison Associates
SION

Jennison Associates’s Sionna Therapeutics SION Stock Holding History

Jennison Associates’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 		$58.2M Buy
1,451,220
+335,942
+30% +$12.8M 0.04% 200
2025
Q4 		$45.9M Buy
1,115,278
+117,903
+12% +$4.47M 0.03% 220
2025
Q3 		$29.3M Buy
997,375
+244,575
+32% +$5.32M 0.02% 291
2025
Q2 		$13.1M Sell
752,800
-107,127
-12% -$1.4M 0.01% 363
2025
Q1 		$8.99M Buy
+859,927
New +$14.1M 0.01% 387

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
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
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Jennison Associates's SION Position: Q1 2026 in Review

Jennison Associates increased its Sionna Therapeutics (SION) stake by 30% in Q1 2026, buying an estimated $12.8M and bringing the position to 1,451,220 shares worth $58.2M. The position accounts for 0.04% of the portfolio, ranked #200.

Jennison Associates first reported a position in SION in Q1 2025 and has held it in 5 quarters since. 122 funds tracked by Wall St. Rank hold SION as of Q1 2026.

  • Jennison Associates held 1,451,220 shares of Sionna Therapeutics worth $58.2M as of Q1 2026.
  • Jennison Associates bought 335,942 Sionna Therapeutics shares in Q1 2026, an estimated $12.8M.
  • Sionna Therapeutics made up 0.04% of Jennison Associates's portfolio in Q1 2026, its #200 holding.
  • Jennison Associates first reported a position in Sionna Therapeutics in Q1 2025 and has held it in 5 quarters since.
  • 122 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q1 2026.

Based on Jennison Associates's 13F filing for Q1 2026, filed 6 May 2026.