Vanguard Asset Management
SION

Vanguard Asset Management’s Sionna Therapeutics SION Stock Holding History

Vanguard Asset 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 		$419K Buy
+9,535
New +$381K ﹤0.01% 2252

Other funds holding SION

RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 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
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Asset Management's SION Position: Q2 2026 in Review

Vanguard Asset Management opened a new position in Sionna Therapeutics (SION) in Q2 2026: 9,535 shares worth $419K. The stake represents ﹤0.01% of the portfolio and ranks #2252 among its holdings.

132 funds tracked by Wall St. Rank hold SION as of Q2 2026.

  • Vanguard Asset Management held 9,535 shares of Sionna Therapeutics worth $419K as of Q2 2026.
  • Sionna Therapeutics was a new Vanguard Asset Management position in Q2 2026.
  • Sionna Therapeutics made up ﹤0.01% of Vanguard Asset Management's portfolio in Q2 2026, its #2252 holding.
  • 132 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q2 2026.

Based on Vanguard Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.