Citadel Advisors
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Citadel Advisors’s Perma-Fix Environmental Services PESI Stock Holding History

Citadel Advisors’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 		– Sell
-29,300
Closed -$369K – 13908
2025
Q4 		$369K Buy
29,300
+14,400
+97% +$184K ﹤0.01% 9710
2025
Q3 		$150K Buy
14,900
+2,600
+21% +$28.7K ﹤0.01% 11531
2025
Q2 		$129K Buy
12,300
+9,300
+310% +$85.5K ﹤0.01% 11097
2025
Q1 		$21.8K Sell
3,000
-30,500
-91% -$274K ﹤0.01% 13083
2024
Q4 		$371K Buy
33,500
+22,200
+196% +$292K ﹤0.01% 9228
2024
Q3 		$139K Buy
11,300
+8,100
+253% +$86.6K ﹤0.01% 10669
2024
Q2 		$32.4K Buy
3,200
+500
+19% +$5.54K ﹤0.01% 12177
2024
Q1 		$32.1K Buy
2,700
+1,700
+170% +$14.7K ﹤0.01% 12631
2023
Q4 		$7.86K Sell
1,000
-13,600
-93% -$115K ﹤0.01% 13263
2023
Q3 		$153K Buy
14,600
+3,200
+28% +$35.3K ﹤0.01% 10325
2023
Q2 		$125K Sell
11,400
-12,200
-52% -$127K ﹤0.01% 10588
2023
Q1 		$278K Buy
+23,600
New +$154K ﹤0.01% 9525

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

Citadel Advisors's PESI Position: Q1 2026 in Review

Citadel Advisors increased its Perma-Fix Environmental Services (PESI) stake by 92% in Q1 2026, buying an estimated $456K and bringing the position to 69,313 shares worth $741K. The position accounts for ﹤0.01% of the portfolio, ranked #8386.

Citadel Advisors first reported a position in PESI in Q3 2013 and has held it in 18 quarters since. The position peaked at $821K in Q1 2025. 85 funds tracked by Wall St. Rank hold PESI as of Q1 2026.

  • Citadel Advisors held 69,313 shares of Perma-Fix Environmental Services worth $741K as of Q1 2026.
  • Citadel Advisors bought 33,184 Perma-Fix Environmental Services shares in Q1 2026, an estimated $456K.
  • Perma-Fix Environmental Services made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #8386 holding.
  • Citadel Advisors first reported a position in Perma-Fix Environmental Services in Q3 2013 and has held it in 18 quarters since.
  • Citadel Advisors's Perma-Fix Environmental Services position peaked at $821K in Q1 2025.
  • 85 funds tracked by Wall St. Rank held Perma-Fix Environmental Services as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.