VIA
SION

Virtus Investment Advisers’s Sionna Therapeutics SION Stock Holding History

Virtus Investment Advisers’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 		$401K Buy
9,109
+2,735
+43% +$109K 0.09% 278
2026
Q1 		$256K Buy
6,374
+154
+2% +$5.88K 0.07% 313
2025
Q4 		$256K Sell
6,220
-478
-7% -$18.1K 0.07% 317
2025
Q3 		$197K Buy
6,698
+1,163
+21% +$25.3K 0.06% 257
2025
Q2 		$96K Buy
+5,535
New +$72.5K 0.03% 347

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

Virtus Investment Advisers's SION Position: Q2 2026 in Review

Virtus Investment Advisers increased its Sionna Therapeutics (SION) stake by 43% in Q2 2026, buying an estimated $109K and bringing the position to 9,109 shares worth $401K. The position accounts for 0.09% of the portfolio, ranked #278.

Virtus Investment Advisers first reported a position in SION in Q2 2025 and has held it in 5 quarters since. 146 funds tracked by Wall St. Rank hold SION as of Q2 2026.

  • Virtus Investment Advisers held 9,109 shares of Sionna Therapeutics worth $401K as of Q2 2026.
  • Virtus Investment Advisers bought 2,735 Sionna Therapeutics shares in Q2 2026, an estimated $109K.
  • Sionna Therapeutics made up 0.09% of Virtus Investment Advisers's portfolio in Q2 2026, its #278 holding.
  • Virtus Investment Advisers first reported a position in Sionna Therapeutics in Q2 2025 and has held it in 5 quarters since.
  • 146 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q2 2026.

Based on Virtus Investment Advisers's 13F filing for Q2 2026, filed 11 Aug 2026.