BLAIR WILLIAM & CO/IL
Position in CCOI — Cogent Communications Holdings, Inc.
CIK 902367
CHICAGO, IL
Position in CCOI
as of Jun 30, 2026
· filed Aug 11, 2026
Position Value
$1,865,208
-$1,272,047 QoQ
Shares Held
134,381
-19.3% QoQ
Ownership
0.262%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#52
of 224 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 85%
Shared 0%
None 15%
Common Shares in CCOI Over Time
Shares Held
Position Value (USD)
Position in Telecom Services
Communication Services · as of Jun 30, 2026BLAIR WILLIAM & CO/IL holds $50,990,304 across 9 Telecom Services names. CCOI ranks #6 (3.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VZ |
Verizon Communications Inc
|
612,014 | $25,912,672 | |
| 2 | IRDM |
Iridium Communications Inc.
|
172,503 | $9,461,789 | |
| 3 | T |
At&T Inc.
|
375,495 | $7,772,746 | |
| 4 | CMCSA |
Comcast Corp
|
108,223 | $2,656,874 | |
| 5 | TMUS |
T-Mobile US, Inc.
|
14,625 | $2,453,051 | |
| 6 | CCOI |
Cogent Communications Holdings, Inc.
This page
|
134,381 | $1,865,208 | |
| 7 | VOD |
Vodafone Group Public Ltd Co
|
24,627 | $325,815 | |
| 8 | CHTR |
Charter Communications, Inc. /Mo/
|
2,214 | $314,852 |
All Filings in CCOI
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $1,865,208 | 134,381 | Shares | Sole | 2026-08-11 | |
| 2026-03-31 | $3,137,255 | 166,521 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $3,830,241 | 177,655 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $9,234,526 | 240,796 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $11,402,629 | 236,520 | Shares | Sole | 2025-07-24 | |
| 2025-03-31 | $12,464,139 | 203,297 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $16,090,135 | 208,773 | Shares | Sole | 2025-02-12 | |
| 2024-09-30 | $17,105,687 | 225,312 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $17,016,603 | 301,499 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $20,027,042 | 306,552 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $28,345,964 | 372,679 | Shares | Sole | 2024-02-12 | |
| 2023-09-30 | $23,435,897 | 378,609 | Shares | Sole | 2023-11-09 | |
| 2023-06-30 | $25,668,443 | 381,460 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $27,032,700 | 424,242 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $25,493,012 | 446,619 | Shares | Sole | 2023-02-10 | |
| 2022-09-30 | $25,480,264 | 488,502 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $25,840,559 | 425,289 | Shares | Sole | 2022-08-10 | |
| 2022-03-31 | $29,653,805 | 446,930 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $32,752,148 | 447,556 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $30,171,393 | 425,909 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $26,170,126 | 340,358 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $24,468,246 | 355,850 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $16,629,670 | 277,763 | Shares | Sole | 2021-02-09 | |
| 2020-09-30 | $12,824,758 | 213,568 | Shares | Sole | 2020-11-06 | |
| 2020-06-30 | $12,406,842 | 160,378 | Shares | Sole | 2020-08-12 | |
| 2020-03-31 | $12,614,445 | 153,891 | Shares | Sole | 2020-05-11 | |
| No filing history on record for this holder in this stock. | ||||||