JY
MBIO icon

Jeff Yass’s Mustang Bio MBIO Stock Holding History

Jeff Yass’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
2021
Q3 		– Sell
-18
Closed -$45K – 13223
2021
Q2 		$45K Sell
18
-58
-76% -$142K ﹤0.01% 12326
2021
Q1 		$188K Sell
76
-117
-61% -$348K ﹤0.01% 11473
2020
Q4 		$549K Buy
+193
New +$461K ﹤0.01% 8077
2020
Q3 		– Sell
-20
Closed -$48K – 10899
2020
Q2 		$48K Buy
+20
New +$46.8K ﹤0.01% 9761
2020
Q1 		– Sell
-93
Closed -$284K – 10618
2019
Q4 		$284K Sell
93
-40
-30% -$91.6K ﹤0.01% 8135
2019
Q3 		$325K Buy
133
+48
+56% +$131K ﹤0.01% 8130
2019
Q2 		$234K Buy
+85
New +$243K ﹤0.01% 8820

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 40.91% 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
XT
XTX Topco George Town, Cayman Islands $7.72B AUM 32.88% 1-Year Est. Return
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

Jeff Yass's MBIO Position: Q2 2026 in Review

Jeff Yass opened a new position in Mustang Bio (MBIO) in Q2 2026: 13,664 shares worth $9.59K. The stake represents ﹤0.01% of the portfolio and ranks #13139 among its holdings. This is a return to the name: Jeff Yass previously reported a position in MBIO as recently as Q3 2024.

Jeff Yass first reported a position in MBIO in Q1 2018 and has held it in 19 quarters since. The position peaked at $863K in Q1 2018. 23 funds tracked by Wall St. Rank hold MBIO as of Q2 2026.

  • Jeff Yass held 13,664 shares of Mustang Bio worth $9.59K as of Q2 2026.
  • Mustang Bio was a new Jeff Yass position in Q2 2026.
  • Mustang Bio made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #13139 holding.
  • Jeff Yass first reported a position in Mustang Bio in Q1 2018 and has held it in 19 quarters since.
  • Jeff Yass's Mustang Bio position peaked at $863K in Q1 2018.
  • 23 funds tracked by Wall St. Rank held Mustang Bio as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.