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David Shaw’s Perma-Fix Environmental Services PESI Stock Holding History

David Shaw’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 		$355K Sell
24,858
-38,131
-61% -$425K ﹤0.01% 4342
2026
Q1 		$673K Sell
62,989
-33,020
-34% -$454K ﹤0.01% 3695
2025
Q4 		$1.21M Buy
96,009
+49,704
+107% +$634K ﹤0.01% 3415
2025
Q3 		$468K Buy
+46,305
New +$512K ﹤0.01% 3896

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

David Shaw's PESI Position: Q2 2026 in Review

David Shaw reduced its Perma-Fix Environmental Services (PESI) stake by 61% in Q2 2026, selling an estimated $425K and leaving 24,858 shares worth $355K. The position accounts for ﹤0.01% of the portfolio, ranked #4342.

David Shaw first reported a position in PESI in Q3 2025 and has held it in 4 quarters since. The position peaked at $1.21M in Q4 2025. 88 funds tracked by Wall St. Rank hold PESI as of Q2 2026.

  • David Shaw held 24,858 shares of Perma-Fix Environmental Services worth $355K as of Q2 2026.
  • David Shaw sold 38,131 Perma-Fix Environmental Services shares in Q2 2026, an estimated $425K.
  • Perma-Fix Environmental Services made up ﹤0.01% of David Shaw's portfolio in Q2 2026, its #4342 holding.
  • David Shaw first reported a position in Perma-Fix Environmental Services in Q3 2025 and has held it in 4 quarters since.
  • David Shaw's Perma-Fix Environmental Services position peaked at $1.21M in Q4 2025.
  • 88 funds tracked by Wall St. Rank held Perma-Fix Environmental Services as of Q2 2026.

Based on D.E. Shaw & Co's 13F filing for Q2 2026, filed 14 Aug 2026.