Ken Griffin Energy Recovery, Inc. Transaction History

Citadel Advisors LLC

$618 Billion
Q3 2025

A detailed history of Ken Griffin (Citadel Advisors LLC) transactions in Energy Recovery, Inc. stock. As of the latest transaction made, Citadel Advisors LLC holds 331,820 shares of ERII stock, worth $4.83 Million. This represents 0.0% of its overall portfolio holdings.

Number of Shares

331,820

Previous 18,400 1703.37%

Holding current value

$4.83 Million

Previous $235,000 2077.02%

% of portfolio

0.0%

Previous 0.0%

30 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 14, 2025	BUY	$12.72 - $15.42 $3.74 Million - $4.53 Million	293,741 Added 771.4%	331,820 $5.12 Million
Q2 2025 Aug 14, 2025	SELL	$11.37 - $15.97 $2.77 Million - $3.9 Million	-243,931 Reduced 86.5%	38,079 $486,000
Q1 2025 May 15, 2025	BUY	$14.06 - $16.83 $3.29 Million - $3.94 Million	234,127 Added 488.96%	282,010 $4.48 Million
Q4 2024 Feb 14, 2025	SELL	$14.66 - $19.93 $946,288 - $1.29 Million	-64,549 Reduced 57.41%	47,883 $703,000
Q3 2024 Nov 14, 2024	SELL	$12.6 - $18.23 $1.01 Million - $1.47 Million	-80,464 Reduced 41.71%	112,432 $1.96 Million

Q2 2024 Aug 14, 2024	BUY	$12.37 - $15.87 $2.26 Million - $2.9 Million	183,021 Added 1853.38%	192,896 $2.56 Million
Q1 2024 May 15, 2024	SELL	$14.04 - $18.88 $352,333 - $473,793	-25,095 Reduced 71.76%	9,875 $155,000
Q4 2023 Feb 14, 2024	BUY	$14.16 - $20.84 $73,872 - $108,722	5,217 Added 17.53%	34,970 $658,000
Q3 2023 Nov 14, 2023	BUY	$20.68 - $30.61 $555,361 - $822,031	26,855 Added 926.67%	29,753 $631,000
Q2 2023 Aug 14, 2023	BUY	$21.98 - $29.42 $45,982 - $61,546	2,092 Added 259.55%	2,898 $80,000
Q1 2023 May 15, 2023	SELL	$19.8 - $23.89 $119,889 - $144,653	-6,055 Reduced 88.25%	806 $18,000
Q4 2022 Feb 14, 2023	SELL	$17.65 - $26.17 $1.7 Million - $2.51 Million	-96,079 Reduced 93.33%	6,861 $140,000
Q3 2022 Nov 14, 2022	BUY	$19.04 - $26.02 $1.72 Million - $2.35 Million	90,261 Added 711.89%	102,940 $2.24 Million
Q2 2022 Aug 15, 2022	SELL	$17.16 - $21.57 $160,737 - $202,046	-9,367 Reduced 42.49%	12,679 $246,000
Q1 2022 May 16, 2022	BUY	$18.4 - $21.78 $106,535 - $126,106	5,790 Added 35.62%	22,046 $444,000
Q4 2021 Feb 14, 2022	SELL	$18.85 - $24.18 $106,615 - $136,762	-5,656 Reduced 25.81%	16,256 $349,000
Q3 2021 Nov 15, 2021	SELL	$18.59 - $23.03 $598,616 - $741,589	-32,201 Reduced 59.51%	21,912 $417,000
Q2 2021 Aug 16, 2021	SELL	$16.76 - $22.78 $3.26 Million - $4.42 Million	-194,220 Reduced 78.21%	54,113 $1.23 Million
Q1 2021 May 17, 2021	BUY	$13.58 - $19.42 $3.14 Million - $4.48 Million	230,908 Added 1325.15%	248,333 $4.55 Million
Q4 2020 Feb 16, 2021	SELL	$8.33 - $13.75 $190,482 - $314,421	-22,867 Reduced 56.75%	17,425 $238,000
Q3 2020 Nov 16, 2020	BUY	$6.85 - $8.96 $276,000 - $361,016	40,292 New	40,292 $330,000
Q2 2020 Aug 14, 2020	SELL	$6.94 - $9.05 $121,887 - $158,945	-17,563 Closed	0 $0
Q1 2020 May 15, 2020	SELL	$6.5 - $11.02 $156,780 - $265,802	-24,120 Reduced 57.87%	17,563 $131,000
Q2 2019 Aug 14, 2019	BUY	$8.79 - $11.02 $129,555 - $162,423	14,739 Added 54.7%	41,683 $434,000
Q1 2019 May 15, 2019	BUY	$6.77 - $9.1 $12,186 - $16,380	1,800 Added 7.16%	26,944 $0
Q3 2018 Nov 13, 2018	SELL	$7.68 - $9.79 $562,767 - $717,381	-73,277 Reduced 74.45%	25,144 $0
Q2 2018 Aug 10, 2018	SELL	$7.81 - $9.1 $504,729 - $588,096	-64,626 Reduced 39.64%	98,421 $0
Q1 2018 May 11, 2018	BUY	$6.63 - $9.09 $781,431 - $1.07 Million	117,863 Added 260.85%	163,047 $1.34 Million
Q4 2017 Feb 09, 2018	BUY	$7.61 - $11.23 $56,367 - $83,180	7,407 Added 19.61%	45,184 $395,000
Q3 2017 Nov 09, 2017	BUY	$6.18 - $7.9 $233,461 - $298,438	37,777	37,777 $298,000

Others Institutions Holding ERII

# of Institutions

205

Shares Held

44M

Call Options Held

95.7K

Put Options Held

61.3K

View Full List

About Energy Recovery, Inc.

Ticker ERII
Exchange NASDAQ
Sector Industrials
Industry Pollution & Treatment Controls
Shares Outstandng 55,787,100
Market Cap $812M
Description
Energy Recovery, Inc., together with its subsidiaries, designs, manufactures, and sells various solutions for the seawater reverse osmosis desalination and industrial wastewater treatment industries worldwide. The company operates through Water and Emerging Technologies segments. It offers a suite of products, including energy recovery devices, ...

More about ERII

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