Jane Street
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Jane Street’s Perma-Fix Environmental Services PESI Stock Holding History

Jane Street’s Portfolio PESI Stock Details PESI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$545K Buy
+51,000
New +$701K ﹤0.01% 7843

Other funds holding PESI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
MCO
MAK Capital One New York $679M AUM 29.02% 1-Year Est. Return
PGCM
Prescott Group Capital Management Tulsa, Oklahoma $1B AUM 51.95% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
HA
Heartland Advisors Milwaukee, Wisconsin $1.96B AUM 28.26% 1-Year Est. Return
Diamond Hill Capital Management
Diamond Hill Capital Management Columbus, Ohio $16B AUM 4.15% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
PCM
Potomac Capital Management New York $115M AUM
Group One Trading
Group One Trading Chicago, Illinois $52.2B AUM 104.56% 1-Year Est. Return

Jane Street's PESI Position: Q1 2026 in Review

Jane Street reduced its Perma-Fix Environmental Services (PESI) stake by 80% in Q1 2026, selling an estimated $1.59M and leaving 28,525 shares worth $305K. The position accounts for ﹤0.01% of the portfolio, ranked #9202.

Jane Street first reported a position in PESI in Q2 2013 and has held it in 9 quarters since. The position peaked at $1.82M in Q4 2025. 85 funds tracked by Wall St. Rank hold PESI as of Q1 2026.

  • Jane Street held 28,525 shares of Perma-Fix Environmental Services worth $305K as of Q1 2026.
  • Jane Street sold 115,714 Perma-Fix Environmental Services shares in Q1 2026, an estimated $1.59M.
  • Perma-Fix Environmental Services made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #9202 holding.
  • Jane Street first reported a position in Perma-Fix Environmental Services in Q2 2013 and has held it in 9 quarters since.
  • Jane Street's Perma-Fix Environmental Services position peaked at $1.82M in Q4 2025.
  • 85 funds tracked by Wall St. Rank held Perma-Fix Environmental Services as of Q1 2026.

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