Bank of America
SION

Bank of America’s Sionna Therapeutics SION Stock Holding History

Bank of America’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 		$2.04M Buy
50,870
+7,303
+17% +$279K ﹤0.01% 4102
2025
Q4 		$1.79M Buy
43,567
+37,026
+566% +$1.4M ﹤0.01% 4153
2025
Q3 		$192K Buy
6,541
+529
+9% +$11.5K ﹤0.01% 6292
2025
Q2 		$104K Sell
6,012
-2,727
-31% -$35.7K ﹤0.01% 6504
2025
Q1 		$91.4K Buy
+8,739
New +$143K ﹤0.01% 6523

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 $167B AUM 44.17% 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

Bank of America's SION Position: Q1 2026 in Review

Bank of America increased its Sionna Therapeutics (SION) stake by 17% in Q1 2026, buying an estimated $279K and bringing the position to 50,870 shares worth $2.04M. The position accounts for ﹤0.01% of the portfolio, ranked #4102.

Bank of America 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.

  • Bank of America held 50,870 shares of Sionna Therapeutics worth $2.04M as of Q1 2026.
  • Bank of America bought 7,303 Sionna Therapeutics shares in Q1 2026, an estimated $279K.
  • Sionna Therapeutics made up ﹤0.01% of Bank of America's portfolio in Q1 2026, its #4102 holding.
  • Bank of America 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 Bank of America's 13F filing for Q1 2026, filed 18 May 2026.