Citadel Advisors
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Citadel Advisors’s Ceco Environmental CECO Stock Holding History

Citadel Advisors’s Portfolio CECO Stock Details CECO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$822K Buy
+13,800
New +$888K ﹤0.01% 8118
2025
Q2 		– Sell
-8,200
Closed -$187K – 12742
2025
Q1 		$187K Buy
8,200
+5,900
+257% +$157K ﹤0.01% 10546
2024
Q4 		$69.5K Buy
2,300
+900
+64% +$25.6K ﹤0.01% 11982
2024
Q3 		$39.5K Sell
1,400
-5,800
-81% -$163K ﹤0.01% 12156
2024
Q2 		$208K Sell
7,200
-7,100
-50% -$172K ﹤0.01% 9850
2024
Q1 		$329K Buy
14,300
+10,700
+297% +$220K ﹤0.01% 9255
2023
Q4 		$73K Buy
3,600
+2,800
+350% +$51K ﹤0.01% 11339
2023
Q3 		$12.8K Sell
800
-1,700
-68% -$23.3K ﹤0.01% 12953
2023
Q2 		$33.4K Buy
2,500
+700
+39% +$8.7K ﹤0.01% 12245
2023
Q1 		$25.2K Sell
1,800
-111,400
-98% -$1.58M ﹤0.01% 12881
2022
Q4 		$1.32M Buy
+113,200
New +$1.28M ﹤0.01% 6281
2021
Q3 		– Sell
-24,100
Closed -$173K – 13850
2021
Q2 		$173K Sell
24,100
-15,900
-40% -$123K ﹤0.01% 12336
2021
Q1 		$317K Sell
40,000
-53,000
-57% -$419K ﹤0.01% 10728
2020
Q4 		$647K Buy
+93,000
New +$683K ﹤0.01% 7656
2020
Q2 		– Sell
-28,100
Closed -$131K – 9825
2020
Q1 		$131K Sell
28,100
-71,100
-72% -$483K ﹤0.01% 8404
2019
Q4 		$760K Sell
99,200
-172,300
-63% -$1.29M ﹤0.01% 6094
2019
Q3 		$1.9M Buy
271,500
+88,000
+48% +$703K ﹤0.01% 4555
2019
Q2 		$1.76M Buy
183,500
+36,200
+25% +$310K ﹤0.01% 4735
2019
Q1 		$1.06M Buy
+147,300
New +$1.07M ﹤0.01% 5474
2018
Q2 		– Sell
-10,500
Closed -$47K – 8842
2018
Q1 		$47K Sell
10,500
-8,700
-45% -$40.8K ﹤0.01% 7937
2017
Q4 		$98K Buy
+19,200
New +$129K ﹤0.01% 7441
2016
Q1 		– Sell
-4,300
Closed -$33K – 6861
2015
Q4 		$33K Buy
4,300
+1,200
+39% +$10.2K ﹤0.01% 7597
2015
Q3 		$25K Buy
+3,100
New +$29.1K ﹤0.01% 8027

Other funds holding CECO

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Citadel Advisors's CECO Position: Q1 2026 in Review

Citadel Advisors increased its Ceco Environmental (CECO) stake by 234% in Q1 2026, buying an estimated $9.8M and bringing the position to 217,386 shares worth $13M. The position accounts for ﹤0.01% of the portfolio, ranked #2878.

Citadel Advisors first reported a position in CECO in Q3 2015 and has held it in 37 quarters since. The position peaked at $17.6M in Q3 2025. 262 funds tracked by Wall St. Rank hold CECO as of Q1 2026.

  • Citadel Advisors held 217,386 shares of Ceco Environmental worth $13M as of Q1 2026.
  • Citadel Advisors bought 152,324 Ceco Environmental shares in Q1 2026, an estimated $9.8M.
  • Ceco Environmental made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #2878 holding.
  • Citadel Advisors first reported a position in Ceco Environmental in Q3 2015 and has held it in 37 quarters since.
  • Citadel Advisors's Ceco Environmental position peaked at $17.6M in Q3 2025.
  • 262 funds tracked by Wall St. Rank held Ceco Environmental as of Q1 2026.

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