Cogent Communications Holdings, Inc.
US ˙ NasdaqGS ˙ US19239V3024

SecurityCCOI / Cogent Communications Holdings, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership50,321 shares
Latest Disclosed Value $ 1,084,921
Alliancebernstein L.p. reports 12.43% decrease in ownership of CCOI / Cogent Communications Holdings, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 50,321 shares of Cogent Communications Holdings, Inc. (US:CCOI) valued at $948,048 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 57,464 shares of Cogent Communications Holdings, Inc.. This represents a change in shares of -12.43% during the quarter. The current value of the position is $824,761 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 50,321 -7,143 -12.43 1,085 -12.44 0.0003
2026-02-17 2025-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 57,464 7,947 16.05 1,239 -34.77 0.0004
2025-11-14 2025-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 49,517 -2,633 -5.05 1,899 -24.50 0.0006
2025-08-14 2025-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 52,150 -447 -0.85 2,514 -22.02 0.0008
2025-05-15 2025-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 52,597 -173 -0.33 3,225 -20.71 0.0012
2025-02-12 2024-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 52,770 327 0.62 4,067 2.14 0.0014
2024-11-14 2024-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 52,443 -2,839 -5.14 3,981 27.60 0.0013
2024-08-14 2024-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 55,282 3,032 5.80 3,120 -8.58 0.0011
2024-05-14 2024-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 52,250 -2,343 -4.29 3,413 -17.80 0.0012
2024-02-14 2023-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 54,593 700 1.30 4,152 24.50 0.0016
2023-11-14 2023-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 53,893 0 0.00 3,336 -8.03 0.0014
2023-08-15 2023-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 53,893 0 0.00 3,626 5.59 0.0015
2023-05-15 2023-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 53,893 -8,906 -14.18 3,434 -4.19 0.0015
2023-02-15 2022-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 62,799 -2,654 -4.05 3,585 4.98 0.0016
2022-11-15 2022-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 65,453 56 0.09 3,414 -14.09 0.0017
2022-08-15 2022-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 65,397 -29,463 -31.06 3,974 -36.86 0.0018
2022-05-13 2022-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 94,860 10,148 11.98 6,294 1.53 0.0024
2022-02-14 2021-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 84,712 16,134 23.53 6,199 27.60 0.0022
2021-11-10 2021-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 68,578 -2,689 -3.77 4,858 -11.35 0.0019
2021-07-30 2021-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 71,267 -26,470 -27.08 5,480 -18.45 0.0022
2021-05-06 2021-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 97,737 30,759 45.92 6,720 67.58 0.0029
2021-02-08 2020-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 66,978 2,551 3.96 4,010 3.64 0.0019
2020-11-12 2020-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 64,427 -5,940 -8.44 3,869 -28.93 0.0021
2020-08-13 2020-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 70,367 4,720 7.19 5,444 1.17 0.0032
2020-05-14 2020-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 65,647 -984 -1.48 5,381 22.71 0.0039
2020-02-18 2019-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 66,631 200 0.30 4,385 19.81 0.0025
2019-11-14 2019-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 66,431 -11,330 -14.57 3,660 -20.71 0.0023
2019-08-14 2019-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 77,761 11,700 17.71 4,616 28.79 0.0029
2019-05-14 2019-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 66,061 0 0.00 3,584 19.99 0.0023
2019-02-13 2018-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 66,061 0 0.00 2,987 -18.96 0.0022
2018-11-08 2018-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 66,061 -2,300 -3.36 3,686 0.99 0.0024
2018-08-13 2018-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 68,361 8,600 14.39 3,650 40.71 0.0025
2018-05-14 2018-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 59,761 -8,700 -12.71 2,594 -16.35 0.0019
2018-02-13 2017-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 68,461 -1,400 -2.00 3,101 -9.22 0.0022
2017-11-13 2017-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 69,861 0 0.00 3,416 21.96 0.0026
2017-08-10 2017-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 69,861 3,000 4.49 2,801 -2.68 0.0022
2017-05-11 2017-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 66,861 0 0.00 2,878 4.09 0.0023
2017-02-13 2016-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 66,861 4,500 7.22 2,765 20.43 0.0023
2016-11-10 2016-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 62,361 -15,500 -19.91 2,296 -26.39 0.0019
2016-08-11 2016-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 77,861 -8,400 -9.74 3,119 -7.37 0.0027
2016-05-13 2016-03-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 86,261 2,796 3.35 3,367 16.30 0.0029
2016-02-16 2015-12-31 13F/A-1 COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 83,465 -9,600 -10.32 2,895 14.52 0.0025
2016-02-12 2015-12-31 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 83,465 2,267
2015-11-13 2015-09-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 93,065 -4,276 -4.39 2,528 -23.25 0.0022
2015-08-14 2015-06-30 13F COGENT COMMUNICATIONS HLDGS COM NEW 19239V302 97,341 10,700 12.35 3,294 7.61 0.0027
2015-05-13 2015-03-31 13F COGENT COMMUNICATIONS HOLDINGS COM NEW 19239V302 86,641 -2,300 -2.59 3,061 -2.76 0.0025
2015-02-13 2014-12-31 13F COGENT COMMUNICATIONS HOLDINGS COM NEW 19239V302 88,941 0 0.00 3,148 5.32 0.0026
2014-11-13 2014-09-30 13F COGENT COMMUNICATIONS HOLDINGS COM NEW 19239V302 88,941 -3,900 -4.20 2,989 -6.83 0.0025
2014-08-13 2014-06-30 13F COGENT COMMUNICATIONS HOLDINGS COM NEW 19239V302 92,841 -3,678 -3.81 3,208 -6.45 0.0027
2014-05-13 2014-03-31 13F COGENT COMMUNICATIONS GROUP COM NEW 19239V302 96,519 -2,200 -2.23 3,429 -14.04 0.0030
2014-02-13 2013-12-31 13F COGENT COMMUNICATIONS GROUP COM NEW 19239V302 98,719 -8,300 -7.76 3,989 15.59 0.0036
2013-11-14 2013-09-30 13F COGENT COMMUNICATIONS GROUP COM NEW 19239V302 107,019 -3,340 -3.03 3,451 11.07 0.0034
2013-08-13 2013-06-30 13F COGENT COMMUNICATIONS GROUP COM NEW 19239V302 110,359 110,359 3,107 0.0033
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.