Arthur R. Block is VP & Secretary at COMCAST CORP (CMCSA). They have made 44 open-market trades across 1 company since 2016, most recently 2026-09-02.
CIK 0001166691
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 44 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CMCSA | 5,391,826 | $118.1M |
Shares reported on the most recent Form 4, priced at the 2026-09-03 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CMCSA | SELL | 2019-03-26 | 2019-03-27 | $39.38 | $247K | +1.2% | +7.1% | +6.3% |
| CMCSA | SELL | 2019-03-25 | 2019-03-27 | $39.46 | $296K | +1.2% | +7.1% | +6.3% |
| CMCSA | SELL | 2019-03-22 | 2019-03-25 | $39.87 | $348K | +2.6% | +6.2% | +10.7% |
| CMCSA | SELL | 2019-03-21 | 2019-03-25 | $39.33 | $309K | +2.6% | +6.2% | +10.7% |
| CMCSA | SELL | 2019-03-19 | 2019-03-21 | $39.98 | $99K | +0.2% | +5.2% | +8.0% |
| CMCSA | SELL | 2019-03-18 | 2019-03-19 | $40.23 | $79K | +0.6% | +6.7% | +7.0% |
| CMCSA | SELL | 2018-12-27 | 2018-12-28 | $33.80 | $140K | +4.5% | +3.1% | +17.9% |
| CMCSA | SELL | 2018-12-18 | 2018-12-19 | $36.41 | $209K | -2.4% | +2.8% | +12.9% |
| CMCSA | SELL | 2018-09-27 | 2018-10-01 | $35.48 | $229K | -4.6% | +8.1% | -3.5% |
| CMCSA | SELL | 2018-03-26 | 2018-03-28 | $33.70 | $540K | +1.2% | -4.9% | -2.0% |
| CMCSA | SELL | 2018-03-22 | 2018-03-26 | $33.74 | $636K | +1.4% | +1.8% | -1.6% |
| CMCSA | SELL | 2018-03-21 | 2018-03-22 | $34.84 | $233K | +2.8% | +1.5% | +0.0% |
| CMCSA | SELL | 2018-03-19 | 2018-03-20 | $35.60 | $88K | -3.1% | -3.2% | -5.8% |
| CMCSA | SELL | 2017-12-27 | 2017-12-28 | $40.62 | $160K | +2.5% | +4.7% | -17.0% |
| CMCSA | SELL | 2017-12-18 | 2017-12-19 | $39.89 | $225K | +4.2% | +6.2% | -10.4% |
| CMCSA | SELL | 2017-09-28 | 2017-09-29 | $38.36 | $157K | -2.6% | -5.0% | +4.9% |
| CMCSA | SELL | 2017-04-19 | 2017-04-20 | $37.82 | $89K | +3.6% | +4.0% | +3.6% |
| CMCSA | SELL | 2017-03-28 | 2017-03-29 | $36.95 | $149K | +1.5% | +5.5% | +5.7% |
| CMCSA | SELL | 2017-03-27 | 2017-03-29 | $37.18 | $589K | +1.5% | +5.5% | +5.7% |
| CMCSA | SELL | 2017-03-27 | 2017-03-29 | $37.13 | $739K | +1.5% | +5.5% | +5.7% |
| CMCSA | SELL | 2017-03-24 | 2017-03-27 | $37.24 | $380K | +3.1% | +4.8% | +7.0% |
| CMCSA | SELL | 2017-03-23 | 2017-03-24 | $36.99 | $455K | +0.4% | +2.2% | +7.4% |
| CMCSA | SELL | 2017-03-22 | 2017-03-24 | $37.13 | $307K | +0.4% | +2.2% | +7.4% |
| CMCSA | SELL | 2017-03-22 | 2017-03-24 | $37.05 | $762K | +0.4% | +2.2% | +7.4% |
| CMCSA | SELL | 2017-03-21 | 2017-03-22 | $37.47 | $264K | +1.5% | +3.1% | +9.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.