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 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

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

TCAM

Turtle Creek Asset Management Toronto, Ontario, Canada $2.56B AUM 1.05% 1-Year Est. Return

PWAM

Park West Asset Management San Francisco, California $1.47B AUM 86.42% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

EIG

EdgePoint Investment Group Toronto, Ontario, Canada $13.2B AUM 32.43% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Newtyn Management New York $801M AUM 23.14% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

CenterBook Partners's CCOI Position: Q2 2026 in Review

CenterBook Partners increased its Cogent Communications (CCOI) stake by 1.9% in Q2 2026, buying an estimated $169K and bringing the position to 503,457 shares worth $6.99M. The position accounts for 0.34% of the portfolio, ranked #64.

CenterBook Partners first reported a position in CCOI in Q3 2024 and has held it in 6 quarters since. The position peaked at $13M in Q4 2025. 224 funds tracked by Wall St. Rank hold CCOI as of Q2 2026.

CenterBook Partners held 503,457 shares of Cogent Communications worth $6.99M as of Q2 2026.
CenterBook Partners bought 9,174 Cogent Communications shares in Q2 2026, an estimated $169K.
Cogent Communications made up 0.34% of CenterBook Partners's portfolio in Q2 2026, its #64 holding.
CenterBook Partners first reported a position in Cogent Communications in Q3 2024 and has held it in 6 quarters since.
CenterBook Partners's Cogent Communications position peaked at $13M in Q4 2025.
224 funds tracked by Wall St. Rank held Cogent Communications as of Q2 2026.

Based on CenterBook Partners's 13F filing for Q2 2026, filed 11 Aug 2026.