Jeff Yass’s Firefly Neuroscience AIFF Stock Holding History

Jeff Yass’s Portfolio AIFF Stock Details AIFF Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2022 Q3	–	Sell	-417	Closed	-$17K	–	14281
2022 Q2	$17K	Buy	+417	New	+$40.2K	﹤0.01%	12407

Other funds holding AIFF

Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return

SSA

Schonfeld Strategic Advisors New York $27.9B AUM 51.18% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

SRL

Scientech Research LLC Jersey City, New Jersey $123M AUM 198.31% 1-Year Est. Return

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

Jeff Yass's AIFF Position: Q1 2026 in Review

Jeff Yass sold out of Firefly Neuroscience (AIFF) in Q1 2026, closing a stake of 37,742 shares — an estimated $33K sold.

Jeff Yass first reported a position in AIFF in Q2 2022 and held it in 7 quarters. The position peaked at $43K in Q2 2022. 23 funds tracked by Wall St. Rank hold AIFF as of Q1 2026.

Jeff Yass reported no remaining Firefly Neuroscience position as of Q1 2026 after selling out during the quarter.
Jeff Yass sold 37,742 Firefly Neuroscience shares in Q1 2026, an estimated $33K.
Jeff Yass first reported a position in Firefly Neuroscience in Q2 2022 and held it in 7 quarters.
Jeff Yass's Firefly Neuroscience position peaked at $43K in Q2 2022.
23 funds tracked by Wall St. Rank held Firefly Neuroscience as of Q1 2026.

Based on Susquehanna International Group's 13F filing for Q1 2026, filed 15 May 2026.