Cogent Communications Holdings, Inc.
US ˙ NasdaqGS ˙ US19239V3024

Introduction

This page provides a comprehensive analysis of the known insider trading history of Dave Schaeffer. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

See the list of most profitable insider traders.

See Highest Ranking Insiders
Companies with Reported Insider Positions

The SEC filings indicate Dave Schaeffer has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:CCOI / Cogent Communications Holdings, Inc. CHAIRMAN, CEO, AND PRESIDENT, Director 697,143
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Dave Schaeffer. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Purchases CCOI / Cogent Communications Holdings, Inc. - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in CCOI / Cogent Communications Holdings, Inc.. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares		 Reported
Price		 Adjusted
Shares		 Adjusted
Price		 Cost Basis Days to
Max		 Price at
Max		 Max
Profit ($)		 Max Return (%)
There are no known unplanned open-market trades for this insider and security combination

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

CCOI / Cogent Communications Holdings, Inc. Insider Trades
Insider Sales CCOI / Cogent Communications Holdings, Inc. - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in CCOI / Cogent Communications Holdings, Inc.. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market sales that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares		 Reported
Price		 Adjusted
Shares		 Adjusted
Price		 Cost Basis Days to
Min		 Price at
Min		 Max Loss
Avoided ($)		 Max Loss
Avoided (%)
2025-08-08 CCOI SCHAEFFER DAVE 818,909 27.5000 818,909 27.5000 22,519,998 0 30.6200 2,554,997 11.35
2025-08-07 CCOI SCHAEFFER DAVE 1,840,669 32.6000 1,840,669 32.6000 60,005,809
2025-06-16 CCOI SCHAEFFER DAVE 45,000 47.1387 45,000 47.1387 2,121,242
2025-06-16 CCOI SCHAEFFER DAVE 25,000 47.0547 25,000 47.0547 1,176,368
2025-06-13 CCOI SCHAEFFER DAVE 45,000 47.4187 45,000 47.4187 2,133,842
2025-06-13 CCOI SCHAEFFER DAVE 10,000 47.3362 10,000 47.3362 473,362
2025-06-12 CCOI SCHAEFFER DAVE 45,000 47.8672 45,000 47.8672 2,154,024
2025-06-12 CCOI SCHAEFFER DAVE 10,000 47.8348 10,000 47.8348 478,348
2025-06-11 CCOI SCHAEFFER DAVE 45,000 48.5472 45,000 48.5472 2,184,624
2025-06-11 CCOI SCHAEFFER DAVE 10,000 48.3511 10,000 48.3511 483,511
2025-06-10 CCOI SCHAEFFER DAVE 40,000 48.6999 40,000 48.6999 1,947,996
2025-06-10 CCOI SCHAEFFER DAVE 15,000 48.6329 15,000 48.6329 729,494
2025-06-09 CCOI SCHAEFFER DAVE 40,000 48.5117 40,000 48.5117 1,940,468
2025-06-09 CCOI SCHAEFFER DAVE 15,000 48.9919 15,000 48.9919 734,878
2025-06-06 CCOI SCHAEFFER DAVE 50,000 47.7764 50,000 47.7764 2,388,820
2025-06-06 CCOI SCHAEFFER DAVE 30,000 47.7768 30,000 47.7768 1,433,304
2025-06-05 CCOI SCHAEFFER DAVE 40,000 47.2883 40,000 47.2883 1,891,532
2025-06-05 CCOI SCHAEFFER DAVE 35,000 47.3081 35,000 47.3081 1,655,784
2025-06-04 CCOI SCHAEFFER DAVE 50,000 47.7608 50,000 47.7608 2,388,040
2025-06-04 CCOI SCHAEFFER DAVE 25,000 47.7577 25,000 47.7577 1,193,942
2025-06-03 CCOI SCHAEFFER DAVE 50,000 46.9997 50,000 46.9997 2,349,985
2025-06-03 CCOI SCHAEFFER DAVE 15,000 46.8588 15,000 46.8588 702,882
2025-06-02 CCOI SCHAEFFER DAVE 50,000 46.3827 50,000 46.3827 2,319,135
2025-06-02 CCOI SCHAEFFER DAVE 15,000 46.1337 15,000 46.1337 692,006
2025-05-30 CCOI SCHAEFFER DAVE 25,000 45.8970 25,000 45.8970 1,147,425
2025-05-29 CCOI SCHAEFFER DAVE 25,000 46.9037 25,000 46.9037 1,172,592
2025-05-28 CCOI SCHAEFFER DAVE 20,000 47.4087 20,000 47.4087 948,174
2025-05-27 CCOI SCHAEFFER DAVE 20,000 48.6661 20,000 48.6661 973,322
2025-05-23 CCOI SCHAEFFER DAVE 25,000 46.9327 25,000 46.9327 1,173,318
2025-05-22 CCOI SCHAEFFER DAVE 25,000 46.2707 25,000 46.2707 1,156,768
2025-05-21 CCOI SCHAEFFER DAVE 40,000 46.8062 40,000 46.8062 1,872,248
2025-05-20 CCOI SCHAEFFER DAVE 15,000 49.9565 15,000 49.9565 749,348
2025-05-16 CCOI SCHAEFFER DAVE 15,000 50.9950 15,000 50.9950 764,925
2025-05-15 CCOI SCHAEFFER DAVE 40,000 50.3759 40,000 50.3759 2,015,036
2025-05-14 CCOI SCHAEFFER DAVE 30,000 50.6380 30,000 50.6380 1,519,140
2025-05-13 CCOI SCHAEFFER DAVE 42,628 50.4467 42,628 50.4467 2,150,442
2025-05-12 CCOI SCHAEFFER DAVE 11,372 50.1046 11,372 50.1046 569,790
2025-03-04 CCOI SCHAEFFER DAVE 60,000 71.7663 60,000 71.7663 4,305,978
2024-11-26 CCOI SCHAEFFER DAVE 24,364 82.6850 24,364 82.6850 2,014,537
2024-11-25 CCOI SCHAEFFER DAVE 35,636 83.7620 35,636 83.7620 2,984,943
2024-09-10 CCOI SCHAEFFER DAVE 65,000 71.7470 65,000 71.7470 4,663,555
2024-08-27 CCOI SCHAEFFER DAVE 60,000 72.8160 60,000 72.8160 4,368,960
2024-06-14 CCOI SCHAEFFER DAVE 60,000 51.7805 60,000 51.7805 3,106,830
2024-06-12 CCOI SCHAEFFER DAVE 60,000 54.6000 60,000 54.6000 3,276,000
2024-05-13 CCOI SCHAEFFER DAVE 50,000 59.4400 50,000 59.4400 2,972,000
2024-03-15 CCOI SCHAEFFER DAVE 26,174 64.2100 26,174 64.2100 1,680,633
2024-03-13 CCOI SCHAEFFER DAVE 30,000 67.5200 30,000 67.5200 2,025,600
2024-03-12 CCOI SCHAEFFER DAVE 50,000 68.1200 50,000 68.1200 3,406,000
2024-03-11 CCOI SCHAEFFER DAVE 35,000 67.9300 35,000 67.9300 2,377,550
2024-03-06 CCOI SCHAEFFER DAVE 8,826 72.5500 8,826 72.5500 640,326
2023-12-13 CCOI SCHAEFFER DAVE 20,000 69.9900 20,000 69.9900 1,399,800
2023-12-01 CCOI SCHAEFFER DAVE 36,604 65.1757 36,604 65.1757 2,385,691
2023-11-30 CCOI SCHAEFFER DAVE 3,396 64.3136 3,396 64.3136 218,409
2023-11-14 CCOI SCHAEFFER DAVE 40,000 66.3700 40,000 66.3700 2,654,800
2023-09-15 CCOI SCHAEFFER DAVE 18,191 65.8218 18,191 65.8218 1,197,364
2023-09-13 CCOI SCHAEFFER DAVE 16,753 66.6990 16,753 66.6990 1,117,408
2023-09-12 CCOI SCHAEFFER DAVE 28,247 66.9675 28,247 66.9675 1,891,631
2023-09-11 CCOI SCHAEFFER DAVE 3,309 67.1620 3,309 67.1620 222,239
2023-09-08 CCOI SCHAEFFER DAVE 41,691 67.7180 41,691 67.7180 2,823,231
2023-06-08 CCOI SCHAEFFER DAVE 7,061 62.4385 7,061 62.4385 440,878
2023-06-07 CCOI SCHAEFFER DAVE 42,334 62.3012 42,334 62.3012 2,637,459
2023-06-06 CCOI SCHAEFFER DAVE 25,605 62.2501 25,605 62.2501 1,593,914
2023-05-10 CCOI SCHAEFFER DAVE 35,000 65.3820 35,000 65.3820 2,288,370

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

CCOI / Cogent Communications Holdings, Inc. Insider Trades
Insider Trading History

This table shows the complete list of insider trades made by Dave Schaeffer as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change		 Share
Price		 Tran
Value		 Remaining
Value
2025-08-11 2025-08-08 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -818,909 697,143 -54.02 27.50 -22,519,998 19,171,432
2025-08-08 2025-08-07 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -1,840,669 1,516,052 -54.84 32.60 -60,005,809 49,423,295
2025-06-16 2025-06-13 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -10,000 3,426,721 -0.29 47.34 -473,362 162,207,951
2025-06-16 2025-06-13 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -45,000 3,436,721 -1.29 47.42 -2,133,842 162,964,842
2025-06-16 2025-06-16 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -25,000 3,356,721 -0.74 47.05 -1,176,368 157,949,500
2025-06-16 2025-06-16 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -45,000 3,381,721 -1.31 47.14 -2,121,242 159,409,932
2025-06-12 2025-06-11 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -10,000 3,536,721 -0.28 48.35 -483,511 171,004,351
2025-06-12 2025-06-11 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -45,000 3,546,721 -1.25 48.55 -2,184,624 172,183,374
2025-06-12 2025-06-12 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -10,000 3,481,721 -0.29 47.83 -478,348 166,547,428
2025-06-12 2025-06-12 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -45,000 3,491,721 -1.27 47.87 -2,154,024 167,138,907
2025-06-10 2025-06-10 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -15,000 3,591,721 -0.42 48.63 -729,494 174,675,808
2025-06-10 2025-06-10 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -40,000 3,606,721 -1.10 48.70 -1,947,996 175,646,952
2025-06-09 2025-06-05 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -35,000 3,781,721 -0.92 47.31 -1,655,784 178,906,035
2025-06-09 2025-06-05 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -40,000 3,816,721 -1.04 47.29 -1,891,532 180,486,248
2025-06-09 2025-06-06 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -30,000 3,701,721 -0.80 47.78 -1,433,304 176,856,384
2025-06-09 2025-06-06 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -50,000 3,731,721 -1.32 47.78 -2,388,820 178,288,195
2025-06-09 2025-06-09 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -15,000 3,646,721 -0.41 48.99 -734,878 178,659,791
2025-06-09 2025-06-09 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -40,000 3,661,721 -1.08 48.51 -1,940,468 177,636,311
2025-06-05 2025-06-04 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -25,000 3,856,721 -0.64 47.76 -1,193,942 184,188,125
2025-06-05 2025-06-04 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -50,000 3,881,721 -1.27 47.76 -2,388,040 185,394,100
2025-06-04 2025-06-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -15,000 3,931,721 -0.38 46.86 -702,882 184,235,728
2025-06-04 2025-06-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -50,000 3,946,721 -1.25 47.00 -2,349,985 185,494,703
2025-06-03 2025-06-02 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -15,000 3,996,721 -0.37 46.13 -692,006 184,383,528
2025-06-03 2025-06-02 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -50,000 4,011,721 -1.23 46.38 -2,319,135 186,074,452
2025-06-02 2025-05-30 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -25,000 4,061,721 -0.61 45.90 -1,147,425 186,420,809
2025-05-30 2025-05-29 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -25,000 4,086,721 -0.61 46.90 -1,172,592 191,682,336
2025-05-29 2025-05-28 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -20,000 4,111,721 -0.48 47.41 -948,174 194,931,347
2025-05-28 2025-05-27 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -20,000 4,131,721 -0.48 48.67 -973,322 201,074,747
2025-05-27 2025-05-23 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -25,000 4,151,721 -0.60 46.93 -1,173,318 194,851,476
2025-05-23 2025-05-22 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -25,000 4,176,721 -0.59 46.27 -1,156,768 193,259,804
2025-05-22 2025-05-21 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -40,000 4,201,721 -0.94 46.81 -1,872,248 196,666,593
2025-05-21 2025-05-20 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -15,000 4,241,721 -0.35 49.96 -749,348 211,901,535
2025-05-19 2025-05-16 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -15,000 4,256,721 -0.35 51.00 -764,925 217,071,487
2025-05-16 2025-05-15 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -40,000 4,271,721 -0.93 50.38 -2,015,036 215,191,790
2025-05-15 2025-05-14 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -30,000 4,311,721 -0.69 50.64 -1,519,140 218,336,928
2025-05-14 2025-05-13 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -42,628 4,341,721 -0.97 50.45 -2,150,442 219,025,497
2025-05-14 2025-05-12 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -11,372 4,384,349 -0.26 50.10 -569,790 219,676,053
2025-04-04 2025-04-04 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		D - Sale to Issuer -48,317 4,395,721 -1.09
2025-03-05 2025-03-04 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -60,000 4,444,038 -1.33 71.77 -4,305,978 318,932,164
2025-01-15 2025-01-14 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 96,000 4,504,038 2.18
2025-01-15 2025-01-14 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 84,000 4,408,038 1.94
2024-12-17 2024-12-16 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		D - Sale to Issuer -20,000 4,228,038 -0.47 75.88 -1,517,548 320,812,531
2024-11-27 2024-11-26 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -24,364 4,248,038 -0.57 82.68 -2,014,537 351,249,022
2024-11-27 2024-11-25 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -35,636 4,272,402 -0.83 83.76 -2,984,943 357,864,936
2024-09-11 2024-09-10 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -65,000 4,308,038 -1.49 71.75 -4,663,555 309,088,802
2024-08-28 2024-08-27 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -60,000 4,373,038 -1.35 72.82 -4,368,960 318,427,135
2024-06-17 2024-06-14 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -60,000 4,433,038 -1.34 51.78 -3,106,830 229,544,924
2024-06-13 2024-06-12 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -60,000 4,493,038 -1.32 54.60 -3,276,000 245,319,875
2024-05-14 2024-05-13 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -50,000 4,553,038 -1.09 59.44 -2,972,000 270,632,579
2024-04-01 2024-04-01 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		D - Sale to Issuer -50,165 4,603,038 -1.08
2024-03-18 2024-03-15 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -26,174 4,653,203 -0.56 64.21 -1,680,633 298,782,165
2024-03-15 2024-03-13 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -30,000 4,679,377 -0.64 67.52 -2,025,600 315,951,535
2024-03-14 2024-03-11 4/A CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -35,000 4,759,377 -0.73 67.93 -2,377,550 323,304,480
2024-03-14 2024-03-12 4/A CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -50,000 4,709,377 -1.05 68.12 -3,406,000 320,802,761
2024-03-12 2024-03-11 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		D - Sale to Issuer -35,000 4,759,377 -0.73 67.93 -2,377,550 323,304,480
2024-03-12 2024-03-12 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		D - Sale to Issuer -50,000 4,709,377 -1.05 68.12 -3,406,000 320,802,761
2024-03-08 2024-03-06 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		D - Sale to Issuer -21,387 4,794,377 -0.44
2024-03-08 2024-03-06 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -8,826 4,815,764 -0.18 72.55 -640,326 349,383,678
2024-01-05 2024-01-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 96,000 4,920,590 1.99
2024-01-05 2024-01-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 84,000 4,824,590 1.77
2023-12-14 2023-12-13 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -20,000 4,740,590 -0.42 69.99 -1,399,800 331,793,894
2023-12-01 2023-11-30 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -3,396 4,797,194 -0.07 64.31 -218,409 308,524,816
2023-12-01 2023-12-01 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -36,604 4,760,590 -0.76 65.18 -2,385,691 310,274,786
2023-11-16 2023-11-14 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -40,000 4,800,590 -0.83 66.37 -2,654,800 318,615,158
2023-09-18 2023-09-15 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -18,191 4,840,590 -0.37 65.82 -1,197,364 318,616,347
2023-09-14 2023-09-13 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -16,753 4,858,781 -0.34 66.70 -1,117,408 324,075,834
2023-09-14 2023-09-12 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -28,247 4,875,534 -0.58 66.97 -1,891,631 326,502,323
2023-09-12 2023-09-11 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -3,309 4,903,781 -0.07 67.16 -222,239 329,347,740
2023-09-12 2023-09-08 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -41,691 4,907,090 -0.84 67.72 -2,823,231 332,298,321
2023-06-08 2023-06-07 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -42,334 4,955,842 -0.85 62.30 -2,637,459 308,754,904
2023-06-08 2023-06-06 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -25,605 4,998,176 -0.51 62.25 -1,593,914 311,136,956
2023-06-08 2023-06-08 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -7,061 4,948,781 -0.14 62.44 -440,878 308,994,462
2023-05-12 2023-05-10 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		S - Sale -35,000 5,023,781 -0.69 65.38 -2,288,370 328,464,849
2023-01-04 2023-01-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 88,000 5,058,781 1.77
2023-01-04 2023-01-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 72,000 4,970,781 1.47
2022-01-05 2022-01-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 88,000 4,898,781 1.83
2022-01-05 2022-01-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 72,000 4,810,781 1.52
2021-02-25 2021-02-24 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 105,000 4,738,781 2.27
2021-02-25 2021-02-24 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 84,000 4,633,781 1.85
2021-01-19 2021-01-18 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		D - Sale to Issuer -15,951 4,549,781 -0.35
2020-03-04 2020-03-01 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		D - Sale to Issuer -32,608 4,565,732 -0.71
2020-02-18 2020-02-14 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 105,000 4,598,340 2.34
2020-02-18 2020-02-14 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 84,000 4,493,340 1.91
2019-05-01 2019-05-01 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 105,000 4,409,340 2.44
2019-05-01 2019-05-01 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 84,000 4,304,340 1.99
2018-02-22 2018-02-21 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 105,000 4,220,340 2.55
2018-02-22 2018-02-21 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 84,000 4,115,340 2.08
2017-05-03 2017-05-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 105,000 4,031,340 2.67
2017-05-03 2017-05-03 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 84,000 3,926,340 2.19
2016-06-15 2016-05-04 4/A CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 170,000 3,842,340 4.63
2016-05-05 2016-05-04 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 170,000 3,382,471 5.29
2014-08-07 2014-08-06 4 CCOI COGENT COMMUNICATIONS HOLDINGS, INC.
common stock 		A - Award 460,000 3,672,471 14.32
2012-04-20 2012-04-19 4 CCOI COGENT COMMUNICATIONS GROUP INC
common stock 		A - Award 460,000 3,212,471 16.71
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)