XT
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XTX Topco’s Mustang Bio MBIO Stock Holding History

XTX Topco’s Portfolio MBIO Stock Details MBIO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$10.3K Buy
+14,648
New +$10.4K ﹤0.01% 4024
2026
Q1 		– Sell
-24,073
Closed -$23.6K – 4133
2025
Q4 		$23.6K Buy
24,073
+5,298
+28% +$6.99K ﹤0.01% 3024
2025
Q3 		$28.5K Buy
+18,775
New +$33.4K ﹤0.01% 2271
2025
Q1 		– Sell
-569
Closed -$5.03K – 2794
2024
Q4 		$5.03K Buy
+569
New +$6.28K ﹤0.01% 2197
2024
Q3 		– Sell
-345
Closed -$8.17K – 2389
2024
Q2 		$8.17K Buy
+345
New +$6.56K ﹤0.01% 1709
2022
Q1 		– Sell
-68
Closed -$85K – 842
2021
Q4 		$85K Buy
+68
New +$110K 0.05% 489

Other funds holding MBIO

KAS
Kestra Advisory Services Austin, Texas $31B AUM 28.39% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
CG
CFO4Life Group Coppell, Texas $743M AUM 25.26% 1-Year Est. Return
Vanguard Fiduciary Trust
Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
VF
Virtu Financial New York $3.18B AUM 65.92% 1-Year Est. Return
TSS
Two Sigma Securities New York $1.16B AUM 36.23% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return

XTX Topco's MBIO Position: Q2 2026 in Review

XTX Topco opened a new position in Mustang Bio (MBIO) in Q2 2026: 14,648 shares worth $10.3K. The stake represents ﹤0.01% of the portfolio and ranks #4024 among its holdings. This is a return to the name: XTX Topco previously reported a position in MBIO as recently as Q4 2025.

XTX Topco first reported a position in MBIO in Q4 2021 and has held it in 6 quarters since. The position peaked at $85K in Q4 2021. 23 funds tracked by Wall St. Rank hold MBIO as of Q2 2026.

  • XTX Topco held 14,648 shares of Mustang Bio worth $10.3K as of Q2 2026.
  • Mustang Bio was a new XTX Topco position in Q2 2026.
  • Mustang Bio made up ﹤0.01% of XTX Topco's portfolio in Q2 2026, its #4024 holding.
  • XTX Topco first reported a position in Mustang Bio in Q4 2021 and has held it in 6 quarters since.
  • XTX Topco's Mustang Bio position peaked at $85K in Q4 2021.
  • 23 funds tracked by Wall St. Rank held Mustang Bio as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.