Jane Street
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Jane Street’s Janux Therapeutics JANX Stock Holding History

Jane Street’s Portfolio JANX Stock Details JANX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-24,300
Closed -$335K – 12286
2025
Q4 		$335K Buy
24,300
+12,400
+104% +$292K ﹤0.01% 8582
2025
Q3 		$291K Buy
+11,900
New +$290K ﹤0.01% 8963
2025
Q1 		– Sell
-4,100
Closed -$220K – 10023
2024
Q4 		$220K Sell
4,100
-5,500
-57% -$291K ﹤0.01% 8262
2024
Q3 		$436K Buy
+9,600
New +$418K ﹤0.01% 7431

Other funds holding JANX

RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
PM
Prosight Management Dallas, Texas $610M AUM 40.86% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
TCM
TCG Crossover Management Palo Alto, California $3.5B AUM 1,165.83% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Jane Street's JANX Position: Q1 2026 in Review

Jane Street reduced its Janux Therapeutics (JANX) stake by 53% in Q1 2026, selling an estimated $3.96M and leaving 251,740 shares worth $3.5M. The position accounts for ﹤0.01% of the portfolio, ranked #4080.

Jane Street first reported a position in JANX in Q4 2021 and has held it in 10 quarters since. The position peaked at $7.46M in Q4 2025. 190 funds tracked by Wall St. Rank hold JANX as of Q1 2026.

  • Jane Street held 251,740 shares of Janux Therapeutics worth $3.5M as of Q1 2026.
  • Jane Street sold 288,493 Janux Therapeutics shares in Q1 2026, an estimated $3.96M.
  • Janux Therapeutics made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #4080 holding.
  • Jane Street first reported a position in Janux Therapeutics in Q4 2021 and has held it in 10 quarters since.
  • Jane Street's Janux Therapeutics position peaked at $7.46M in Q4 2025.
  • 190 funds tracked by Wall St. Rank held Janux Therapeutics as of Q1 2026.

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