Group One Trading’s Perma-Fix Environmental Services PESI Stock Holding History

Group One Trading’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	$2.72M	Buy	+254,300	New	+$3.5M	0.01%	1803
2025 Q4	–	Sell	-2,600	Closed	-$26.3K	–	8904
2025 Q3	$26.3K	Buy	2,600 +1,500	+136%	+$16.6K	﹤0.01%	6493
2025 Q2	$11.6K	Buy	+1,100	New	+$10.1K	﹤0.01%	6625
2025 Q1	–	Sell	-700	Closed	-$7.75K	–	8183
2024 Q4	$7.75K	Buy	+700	New	+$9.21K	﹤0.01%	6221
2024 Q3	–	Sell	-2,700	Closed	-$27.4K	–	7188
2024 Q2	$27.4K	Buy	2,700 +1,200	+80%	+$13.3K	﹤0.01%	4990
2024 Q1	$17.8K	Sell	1,500 -7,000	-82%	-$60.5K	﹤0.01%	5508
2023 Q4	$66.8K	Buy	8,500 +3,100	+57%	+$26.2K	﹤0.01%	4823
2023 Q3	$56.4K	Buy	5,400 +800	+17%	+$8.81K	﹤0.01%	4980
2023 Q2	$50.5K	Buy	+4,600	New	+$48K	﹤0.01%	5267

Other funds holding PESI

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 Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Heartland Advisors Milwaukee, Wisconsin $1.96B AUM 28.26% 1-Year Est. Return

Diamond Hill Capital Management Columbus, Ohio $16B AUM 4.15% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

PCM

Potomac Capital Management New York $115M AUM

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Group One Trading's PESI Position: Q1 2026 in Review

Group One Trading increased its Perma-Fix Environmental Services (PESI) stake by 6,050% in Q1 2026, buying an estimated $3.35M and bringing the position to 247,674 shares worth $2.65M. The position accounts for 0.01% of the portfolio, ranked #1827.

Group One Trading first reported a position in PESI in Q1 2023 and has held it in 10 quarters since. 85 funds tracked by Wall St. Rank hold PESI as of Q1 2026.

Group One Trading held 247,674 shares of Perma-Fix Environmental Services worth $2.65M as of Q1 2026.
Group One Trading bought 243,647 Perma-Fix Environmental Services shares in Q1 2026, an estimated $3.35M.
Perma-Fix Environmental Services made up 0.01% of Group One Trading's portfolio in Q1 2026, its #1827 holding.
Group One Trading first reported a position in Perma-Fix Environmental Services in Q1 2023 and has held it in 10 quarters since.
85 funds tracked by Wall St. Rank held Perma-Fix Environmental Services as of Q1 2026.

Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.