CenterBook Partners’s Cogent Communications CCOI Stock Holding History

CenterBook Partners’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 Q3	$481K	Sell	61,718 -441,739	-88%	-$4.73M	0.02%	657
2026 Q2	$6.99M	Buy	503,457 +9,174	+2%	+$169K	0.34%	64
2026 Q1	$9.31M	Sell	494,283 -107,452	-18%	-$2.37M	0.5%	42
2025 Q4	$13M	Buy	601,735 +431,974	+254%	+$12.8M	0.63%	29
2025 Q3	$6.51M	Buy	+169,761	New	+$7.09M	0.32%	74
2025 Q1	–	Sell	-39,594	Closed	-$3.05M	–	485
2024 Q4	$3.05M	Buy	39,594 +18,694	+89%	+$1.49M	0.18%	153
2024 Q3	$1.59M	Buy	+20,900	New	+$1.44M	0.1%	226

Other funds holding CCOI

Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return

Magnolia Group Omaha, Nebraska $306M AUM 11.01% 1-Year Est. Return

Citigroup New York $308B AUM 40.94% 1-Year Est. Return

Aberdeen Group Edinburgh, United Kingdom $72.4B AUM 24.61% 1-Year Est. Return

Bank of New York Mellon New York $608B AUM 32.77% 1-Year Est. Return

LPL Financial San Diego, California $468B AUM 17.69% 1-Year Est. Return

Y-Intercept (HK) Hong Kong $4.52B AUM 6.6% 1-Year Est. Return

IMC Chicago Chicago, Illinois $483B AUM 41.26% 1-Year Est. Return

Barclays London, United Kingdom $500B AUM 36.84% 1-Year Est. Return

Skylands Capital Milwaukee, Wisconsin $762M AUM 14.92% 1-Year Est. Return

CenterBook Partners's CCOI Position: Q3 2026 in Review

CenterBook Partners reduced its Cogent Communications (CCOI) stake by 88% in Q3 2026, selling an estimated $4.73M and leaving 61,718 shares worth $481K. The position accounts for 0.02% of the portfolio, ranked #657.

CenterBook Partners first reported a position in CCOI in Q3 2024 and has held it in 7 quarters since. The position peaked at $13M in Q4 2025. 66 funds tracked by Wall St. Rank hold CCOI as of Q3 2026.

CenterBook Partners held 61,718 shares of Cogent Communications worth $481K as of Q3 2026.
CenterBook Partners sold 441,739 Cogent Communications shares in Q3 2026, an estimated $4.73M.
Cogent Communications made up 0.02% of CenterBook Partners's portfolio in Q3 2026, its #657 holding.
CenterBook Partners first reported a position in Cogent Communications in Q3 2024 and has held it in 7 quarters since.
CenterBook Partners's Cogent Communications position peaked at $13M in Q4 2025.
66 funds tracked by Wall St. Rank held Cogent Communications as of Q3 2026.

Based on CenterBook Partners's 13F filing for Q3 2026, filed 2 Nov 2026.