Barclays
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Barclays’s Sionna Therapeutics SION Stock Holding History

Barclays’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 		$242K Buy
46,005
+39,510
+608% +$907K ﹤0.01% 3850
2026
Q2 		$286K Sell
6,495
-11,890
-65% -$476K ﹤0.01% 3515
2026
Q1 		$737K Sell
18,385
-29,787
-62% -$1.14M ﹤0.01% 2942
2025
Q4 		$1.98M Buy
48,172
+30,529
+173% +$1.16M ﹤0.01% 2936
2025
Q3 		$519K Sell
17,643
-5,379
-23% -$117K ﹤0.01% 3792
2025
Q2 		$399K Buy
+23,022
New +$302K ﹤0.01% 3890

Other funds holding SION

Y-Intercept (HK)
Y-Intercept (HK) Hong Kong $4.52B AUM 6.6% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Citigroup
Citigroup New York $308B AUM 40.94% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $72.4B AUM 24.61% 1-Year Est. Return
Caitong International Asset Management
Caitong International Asset Management Hong Kong $1.04B AUM 150.25% 1-Year Est. Return
ALPS Advisors
ALPS Advisors Denver, Colorado $21.8B AUM 17.58% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $608B AUM 32.77% 1-Year Est. Return
Creative Planning
Creative Planning Overland Park, Kansas $179B AUM 16.96% 1-Year Est. Return
State of Alaska Department of Revenue
State of Alaska Department of Revenue Juneau, Alaska $9.6B AUM 34.67% 1-Year Est. Return

Barclays's SION Position: Q3 2026 in Review

Barclays increased its Sionna Therapeutics (SION) stake by 608% in Q3 2026, buying an estimated $907K and bringing the position to 46,005 shares worth $242K. The position accounts for ﹤0.01% of the portfolio, ranked #3850.

Barclays first reported a position in SION in Q2 2025 and has held it in 6 quarters since. The position peaked at $1.98M in Q4 2025. 45 funds tracked by Wall St. Rank hold SION as of Q3 2026.

  • Barclays held 46,005 shares of Sionna Therapeutics worth $242K as of Q3 2026.
  • Barclays bought 39,510 Sionna Therapeutics shares in Q3 2026, an estimated $907K.
  • Sionna Therapeutics made up ﹤0.01% of Barclays's portfolio in Q3 2026, its #3850 holding.
  • Barclays first reported a position in Sionna Therapeutics in Q2 2025 and has held it in 6 quarters since.
  • Barclays's Sionna Therapeutics position peaked at $1.98M in Q4 2025.
  • 45 funds tracked by Wall St. Rank held Sionna Therapeutics as of Q3 2026.

Based on Barclays's 13F filing for Q3 2026, filed 6 Nov 2026.