Citadel Advisors
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Citadel Advisors’s Cogent Communications CCOI Stock Holding History

Citadel Advisors’s Portfolio CCOI Stock Details CCOI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$2.32M Sell
123,100
-26,300
-18% -$580K ﹤0.01% 5777
2025
Q4 		$3.22M Buy
149,400
+4,300
+3% +$127K ﹤0.01% 5043
2025
Q3 		$5.56M Buy
145,100
+36,000
+33% +$1.5M ﹤0.01% 4174
2025
Q2 		$5.26M Buy
109,100
+71,000
+186% +$3.61M ﹤0.01% 4031
2025
Q1 		$2.34M Buy
38,100
+6,700
+21% +$494K ﹤0.01% 5241
2024
Q4 		$2.42M Sell
31,400
-343,500
-92% -$27.4M ﹤0.01% 5239
2024
Q3 		$28.5M Buy
374,900
+341,000
+1,006% +$23.5M 0.01% 1720
2024
Q2 		$1.91M Sell
33,900
-600
-2% -$35.8K ﹤0.01% 5406
2024
Q1 		$2.25M Buy
34,500
+24,100
+232% +$1.76M ﹤0.01% 5291
2023
Q4 		$791K Buy
10,400
+900
+9% +$60.1K ﹤0.01% 7153
2023
Q3 		$588K Sell
9,500
-19,700
-67% -$1.29M ﹤0.01% 7705
2023
Q2 		$1.96M Buy
29,200
+13,800
+90% +$901K ﹤0.01% 5171
2023
Q1 		$981K Buy
15,400
+4,700
+44% +$302K ﹤0.01% 6826
2022
Q4 		$611K Sell
10,700
-2,700
-20% -$148K ﹤0.01% 7828
2022
Q3 		$699K Buy
13,400
+4,200
+46% +$242K ﹤0.01% 7747
2022
Q2 		$559K Sell
9,200
-8,200
-47% -$505K ﹤0.01% 8402
2022
Q1 		$1.15M Buy
17,400
+12,100
+228% +$776K ﹤0.01% 7382
2021
Q4 		$388K Sell
5,300
-14,000
-73% -$1.05M ﹤0.01% 10292
2021
Q3 		$1.37M Buy
19,300
+7,300
+61% +$543K ﹤0.01% 7340
2021
Q2 		$923K Sell
12,000
-4,200
-26% -$312K ﹤0.01% 8575
2021
Q1 		$1.11M Buy
16,200
+7,600
+88% +$465K ﹤0.01% 7841
2020
Q4 		$515K Sell
8,600
-6,800
-44% -$402K ﹤0.01% 8087
2020
Q3 		$925K Hold
15,400
– – ﹤0.01% 6182
2020
Q2 		$1.19M Buy
+15,400
New +$1.25M ﹤0.01% 5503
2020
Q1 		– Sell
-8,700
Closed -$573K – 9622
2019
Q4 		$573K Buy
+8,700
New +$525K ﹤0.01% 6606
2019
Q2 		– Sell
-16,300
Closed -$884K – 9207
2019
Q1 		$884K Sell
16,300
-3,300
-17% -$163K ﹤0.01% 5804
2018
Q4 		$886K Sell
19,600
-200
-1% -$9.9K ﹤0.01% 5481
2018
Q3 		$1.1M Buy
19,800
+12,100
+157% +$648K ﹤0.01% 5359
2018
Q2 		$411K Buy
7,700
+1,800
+31% +$89.5K ﹤0.01% 6690
2018
Q1 		$256K Sell
5,900
-5,800
-50% -$255K ﹤0.01% 6976
2017
Q4 		$530K Buy
+11,700
New +$557K ﹤0.01% 5558
2016
Q4 		– Sell
-6,100
Closed -$225K – 7288
2016
Q3 		$225K Sell
6,100
-3,600
-37% -$139K ﹤0.01% 6145
2016
Q2 		$389K Buy
9,700
+3,700
+62% +$145K ﹤0.01% 4832
2016
Q1 		$234K Buy
6,000
+1,300
+28% +$45.1K ﹤0.01% 5420
2015
Q4 		$163K Sell
4,700
-8,500
-64% -$275K ﹤0.01% 6081
2015
Q3 		$359K Sell
13,200
-12,000
-48% -$354K ﹤0.01% 5290
2015
Q2 		$853K Buy
25,200
+13,000
+107% +$436K ﹤0.01% 4184
2015
Q1 		$431K Buy
12,200
+11,200
+1,120% +$410K ﹤0.01% 5141
2014
Q4 		$35K Buy
1,000
+200
+25% +$6.7K ﹤0.01% 7448
2014
Q3 		$27K Sell
800
-900
-53% -$30.7K ﹤0.01% 7269
2014
Q2 		$59K Sell
1,700
-500
-23% -$17.7K ﹤0.01% 6640
2014
Q1 		$78K Sell
2,200
-2,200
-50% -$85.9K ﹤0.01% 6402
2013
Q4 		$178K Buy
4,400
+3,400
+340% +$124K ﹤0.01% 5140
2013
Q3 		$32K Sell
1,000
-2,800
-74% -$85.9K ﹤0.01% 5999
2013
Q2 		$107K Buy
+3,800
New +$106K ﹤0.01% 5172

Other funds holding CCOI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
TCAM
Turtle Creek Asset Management Toronto, Ontario, Canada $2.67B AUM 0.64% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
EIG
EdgePoint Investment Group Toronto, Ontario, Canada $12.5B AUM 31.7% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
PWAM
Park West Asset Management San Francisco, California $1.18B AUM 47.25% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
NM
Newtyn Management New York $936M AUM 27.23% 1-Year Est. Return
MG
Magnolia Group Omaha, Nebraska $538M AUM 5.13% 1-Year Est. Return

Citadel Advisors's CCOI Position: Q1 2026 in Review

Citadel Advisors increased its Cogent Communications (CCOI) stake by 155% in Q1 2026, buying an estimated $5.71M and bringing the position to 426,280 shares worth $8.03M. The position accounts for ﹤0.01% of the portfolio, ranked #3581.

Citadel Advisors first reported a position in CCOI in Q2 2013 and has held it in 45 quarters since. The position peaked at $41.6M in Q4 2023. 233 funds tracked by Wall St. Rank hold CCOI as of Q1 2026.

  • Citadel Advisors held 426,280 shares of Cogent Communications worth $8.03M as of Q1 2026.
  • Citadel Advisors bought 259,156 Cogent Communications shares in Q1 2026, an estimated $5.71M.
  • Cogent Communications made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #3581 holding.
  • Citadel Advisors first reported a position in Cogent Communications in Q2 2013 and has held it in 45 quarters since.
  • Citadel Advisors's Cogent Communications position peaked at $41.6M in Q4 2023.
  • 233 funds tracked by Wall St. Rank held Cogent Communications as of Q1 2026.

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