Rockefeller Capital Management
SION

Rockefeller Capital Management’s Sionna Therapeutics SION Stock Holding History

Rockefeller 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
Q2 		$5.01K Sell
114
-127
-53% -$5.08K ﹤0.01% 4242
2026
Q1 		$9.66K Buy
241
+193
+402% +$7.37K ﹤0.01% 4002
2025
Q4 		$1.98K Buy
+48
New +$1.82K ﹤0.01% 4321

Other funds holding SION

RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
TGA
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
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
O
OrbiMed New York $5.4B AUM 163.13% 1-Year Est. Return
ES
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

Rockefeller Capital Management's SION Position: Q2 2026 in Review

Rockefeller Capital Management reduced its Sionna Therapeutics (SION) stake by 53% in Q2 2026, selling an estimated $5.08K and leaving 114 shares worth $5.01K. The position accounts for ﹤0.01% of the portfolio, ranked #4242.

Rockefeller Capital Management first reported a position in SION in Q4 2025 and has held it in 3 quarters since. The position peaked at $9.66K in Q1 2026. 146 funds tracked by Wall St. Rank hold SION as of Q2 2026.

  • Rockefeller Capital Management held 114 shares of Sionna Therapeutics worth $5.01K as of Q2 2026.
  • Rockefeller Capital Management sold 127 Sionna Therapeutics shares in Q2 2026, an estimated $5.08K.
  • Sionna Therapeutics made up ﹤0.01% of Rockefeller Capital Management's portfolio in Q2 2026, its #4242 holding.
  • Rockefeller Capital Management first reported a position in Sionna Therapeutics in Q4 2025 and has held it in 3 quarters since.
  • Rockefeller Capital Management's Sionna Therapeutics position peaked at $9.66K in Q1 2026.
  • 146 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q2 2026.

Based on Rockefeller Capital Management's 13F filing for Q2 2026, filed 13 Aug 2026.