SignatureFD
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SignatureFD’s Sionna Therapeutics SION Stock Holding History

SignatureFD’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
Q3 		$1.19K Buy
+226
New +$5.19K ﹤0.01% 3298
2026
Q2 		– Sell
-24
Closed -$962 – 3662
2026
Q1 		$962 Buy
+24
New +$916 ﹤0.01% 3221

Other funds holding SION

Atlas Venture Life Science Advisors
Atlas Venture Life Science Advisors Cambridge, Massachusetts $631M AUM 38.42% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $72.4B AUM 31.32% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
Y-Intercept (HK)
Y-Intercept (HK) Hong Kong $4.52B AUM 6.6% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $85.7B AUM 51.02% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Walleye Capital
Walleye Capital New York $109B AUM 29.28% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $114B AUM 35.47% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return

SignatureFD's SION Position: Q3 2026 in Review

SignatureFD opened a new position in Sionna Therapeutics (SION) in Q3 2026: 226 shares worth $1.19K. The stake represents ﹤0.01% of the portfolio and ranks #3298 among its holdings. This is a return to the name: SignatureFD previously reported a position in SION as recently as Q1 2026.

SignatureFD first reported a position in SION in Q1 2026 and has held it in 2 quarters since. 87 funds tracked by Wall St. Rank hold SION as of Q3 2026.

  • SignatureFD held 226 shares of Sionna Therapeutics worth $1.19K as of Q3 2026.
  • Sionna Therapeutics was a new SignatureFD position in Q3 2026.
  • Sionna Therapeutics made up ﹤0.01% of SignatureFD's portfolio in Q3 2026, its #3298 holding.
  • SignatureFD first reported a position in Sionna Therapeutics in Q1 2026 and has held it in 2 quarters since.
  • 87 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q3 2026.

Based on SignatureFD's 13F filing for Q3 2026, filed 23 Oct 2026.