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
Q2 		– Sell
-51,000
Closed -$545K – 12742
2026
Q1 		$545K Buy
+51,000
New +$701K ﹤0.01% 7843

Other funds holding PESI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
MCO
MAK Capital One New York $714M AUM 68.07% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
PGCM
Prescott Group Capital Management Tulsa, Oklahoma $1.16B AUM 53.61% 1-Year Est. Return
Diamond Hill Capital Management
Diamond Hill Capital Management Columbus, Ohio $12.5B AUM 7.49% 1-Year Est. Return
KCM
Kennedy Capital Management St Louis, Missouri $5.65B AUM 61.31% 1-Year Est. Return
PCM
Potomac Capital Management New York $147M AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
HA
Heartland Advisors Milwaukee, Wisconsin $2.25B AUM 44.61% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Jane Street's PESI Position: Q2 2026 in Review

Jane Street increased its Perma-Fix Environmental Services (PESI) stake by 64% in Q2 2026, buying an estimated $202K and bringing the position to 46,651 shares worth $667K. The position accounts for ﹤0.01% of the portfolio, ranked #7387.

Jane Street first reported a position in PESI in Q2 2013 and has held it in 10 quarters since. The position peaked at $1.82M in Q4 2025. 89 funds tracked by Wall St. Rank hold PESI as of Q2 2026.

  • Jane Street held 46,651 shares of Perma-Fix Environmental Services worth $667K as of Q2 2026.
  • Jane Street bought 18,126 Perma-Fix Environmental Services shares in Q2 2026, an estimated $202K.
  • Perma-Fix Environmental Services made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #7387 holding.
  • Jane Street first reported a position in Perma-Fix Environmental Services in Q2 2013 and has held it in 10 quarters since.
  • Jane Street's Perma-Fix Environmental Services position peaked at $1.82M in Q4 2025.
  • 89 funds tracked by Wall St. Rank held Perma-Fix Environmental Services as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.