Jane Street
AIFF

Jane Street’s Firefly Neuroscience AIFF Stock Holding History

Jane Street’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
2026
Q1 		$393K Buy
180,221
+119,906
+199% +$149K ﹤0.01% 8594
2025
Q4 		$52.8K Buy
+60,315
New +$112K ﹤0.01% 10489
2023
Q3 		– Sell
-366
Closed -$3.35K – 9532
2023
Q2 		$3.35K Buy
+366
New +$4.15K ﹤0.01% 8520
2022
Q2 		– Sell
-603
Closed -$96K – 11122
2022
Q1 		$96K Buy
+603
New +$81.5K ﹤0.01% 9476

Other funds holding AIFF

SSA
Schonfeld Strategic Advisors New York $14.2B AUM 37.17% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VFT
Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
SRL
Scientech Research LLC Jersey City, New Jersey $120M AUM 73.62% 1-Year Est. Return
XT
XTX Topco George Town, Cayman Islands $5.75B AUM 30.56% 1-Year Est. Return
Citigroup
Citigroup New York $235B AUM 32.99% 1-Year Est. Return

Jane Street's AIFF Position: Q1 2026 in Review

Jane Street increased its Firefly Neuroscience (AIFF) stake by 199% in Q1 2026, buying an estimated $149K and bringing the position to 180,221 shares worth $393K. The position accounts for ﹤0.01% of the portfolio, ranked #8594.

Jane Street first reported a position in AIFF in Q1 2022 and has held it in 4 quarters since. 23 funds tracked by Wall St. Rank hold AIFF as of Q1 2026.

  • Jane Street held 180,221 shares of Firefly Neuroscience worth $393K as of Q1 2026.
  • Jane Street bought 119,906 Firefly Neuroscience shares in Q1 2026, an estimated $149K.
  • Firefly Neuroscience made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #8594 holding.
  • Jane Street first reported a position in Firefly Neuroscience in Q1 2022 and has held it in 4 quarters since.
  • 23 funds tracked by Wall St. Rank held Firefly Neuroscience as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.