Cogent Communications Holdings, Inc.
US ˙ NasdaqGS ˙ US19239V3024

SecurityCCOI / Cogent Communications Holdings, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership1,150 shares
Latest Disclosed Value $ 21,665
Advisor Group Holdings, Inc. reports 66.15% decrease in ownership of CCOI / Cogent Communications Holdings, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 1,150 shares of Cogent Communications Holdings, Inc. (US:CCOI) valued at $21,666 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,397 shares of Cogent Communications Holdings, Inc.. This represents a change in shares of -66.15% during the quarter. The current value of the position is $18,848 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F COGENT COMM HOLDINGS COM NEW 19239V302 1,150 -2,247 -66.15 22 -71.23 0.0000
2026-02-17 2025-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 3,397 -29,362 -89.63 73 -94.16 0.0001
2025-11-14 2025-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 32,759 2,534 8.38 1,252 -14.20 0.0018
2025-09-04 2025-06-30 13F/A-1 COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 30,225 30,047 16,880.34 1,458 14,480.00 0.0026
2025-08-13 2025-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 392 214 24 0.0000
2025-05-12 2025-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 178 -9,204 -98.10 11 -98.62 0.0000
2025-06-06 2024-12-31 13F/A-1 COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 9,382 -770 -7.58 723 -6.10 0.0016
2025-02-07 2024-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 9,352 -800 721 0.0018
2024-11-13 2024-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 10,152 209 2.10 771 37.25 0.0017
2024-08-13 2024-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 9,943 -604 -5.73 561 -18.58 0.0013
2024-05-10 2024-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 10,547 -11,674 -52.54 689 -59.23 0.0015
2024-02-12 2023-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 22,221 -3,895 -14.91 1,691 4.51 0.0030
2023-11-13 2023-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 26,116 2,219 9.29 1,617 0.56 0.0024
2023-08-21 2023-06-30 13F/A-1 COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 23,897 -3,397 -12.45 1,608 -7.59 0.0029
2023-08-10 2023-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 23,897 -3,397 1,608 0.0004
2023-05-12 2023-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 27,294 4,211 18.24 1,740 31.92 0.0033
2023-02-10 2022-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 23,083 -92 -0.40 1,319 9.10 0.0027
2022-11-14 2022-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 23,175 233 1.02 1,209 -13.27 0.0028
2022-08-10 2022-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 22,942 891 4.04 1,394 -46.94 0.0031
2022-05-04 2022-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 22,051 1,354 6.54 2,627 73.40 0.0051
2022-02-03 2021-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 20,697 9,077 78.12 1,515 84.08 0.0029
2021-11-05 2021-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 11,620 6 0.05 823 -7.94 0.0017
2021-08-02 2021-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 11,614 694 6.36 894 18.57 0.0019
2021-05-13 2021-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 10,920 1,716 18.64 754 36.84 0.0018
2021-02-10 2020-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 9,204 1,924 26.43 551 25.80 0.0015
2020-11-12 2020-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 7,280 779 11.98 438 -13.10 0.0013
2020-08-14 2020-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 6,501 772 13.48 504 7.23 0.0017
2020-05-18 2020-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 5,729 5,729 470 0.0019
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.