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Jeff Yass’s Perma-Fix Environmental Services PESI Stock Holding History

Jeff Yass’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 		$447K Sell
31,300
-119,200
-79% -$1.33M ﹤0.01% 10166
2026
Q1 		$1.61M Buy
150,500
+123,200
+451% +$1.69M ﹤0.01% 6681
2025
Q4 		$344K Sell
27,300
-1,800
-6% -$22.9K ﹤0.01% 9624
2025
Q3 		$294K Buy
+29,100
New +$322K ﹤0.01% 10153
2025
Q2 		– Sell
-19,700
Closed -$143K – 13465
2025
Q1 		$143K Buy
19,700
+4,600
+30% +$41.3K ﹤0.01% 11268
2024
Q4 		$167K Buy
+15,100
New +$199K ﹤0.01% 10925
2024
Q3 		– Sell
-33,500
Closed -$339K – 12767
2024
Q2 		$339K Buy
33,500
+4,500
+16% +$49.9K ﹤0.01% 9167
2024
Q1 		$345K Buy
+29,000
New +$251K ﹤0.01% 9385
2023
Q4 		– Sell
-26,500
Closed -$277K – 13059
2023
Q3 		$277K Buy
26,500
+100
+0.4% +$1.1K ﹤0.01% 9530
2023
Q2 		$290K Sell
26,400
-3,300
-11% -$34.4K ﹤0.01% 9515
2023
Q1 		$350K Buy
+29,700
New +$193K ﹤0.01% 9380

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

Jeff Yass's PESI Position: Q2 2026 in Review

Jeff Yass increased its Perma-Fix Environmental Services (PESI) stake by 1,314% in Q2 2026, buying an estimated $1.63M and bringing the position to 156,934 shares worth $2.24M. The position accounts for ﹤0.01% of the portfolio, ranked #6224.

Jeff Yass first reported a position in PESI in Q2 2013 and has held it in 22 quarters since. 88 funds tracked by Wall St. Rank hold PESI as of Q2 2026.

  • Jeff Yass held 156,934 shares of Perma-Fix Environmental Services worth $2.24M as of Q2 2026.
  • Jeff Yass bought 145,836 Perma-Fix Environmental Services shares in Q2 2026, an estimated $1.63M.
  • Perma-Fix Environmental Services made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #6224 holding.
  • Jeff Yass first reported a position in Perma-Fix Environmental Services in Q2 2013 and has held it in 22 quarters since.
  • 88 funds tracked by Wall St. Rank held Perma-Fix Environmental Services as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.