Marc D. Comerchero is CAO at BlackRock, Inc. (BLK). They have made 7 open-market trades across 1 company since 2017, most recently 2026-01-31.
CIK 0001668100
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 7 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| BLK | 7,016 | $8.6M |
Shares reported on the most recent Form 4, priced at the 2026-02-03 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BLK | SELL | 2024-02-05 | 2024-02-07 | $785.11 | $707K | +0.5% | +5.3% | -1.7% |
| BLK | SELL | 2023-02-09 | 2023-02-10 | $728.66 | $474K | -4.3% | -13.4% | -11.2% |
| BLK | SELL | 2021-04-16 | 2021-04-16 | $808.38 | $485K | +0.6% | +4.7% | +8.5% |
| BLK | SELL | 2020-02-07 | 2020-02-07 | $553.01 | $332K | +2.4% | -24.3% | -10.1% |
| BLK | SELL | 2019-02-15 | 2019-02-15 | $432.22 | $519K | +3.5% | +2.8% | +4.4% |
| BLK | SELL | 2018-04-18 | 2018-04-18 | $524.84 | $210K | -0.4% | +2.8% | -3.6% |
| BLK | SELL | 2017-02-03 | 2017-02-03 | $374.64 | $225K | +4.9% | +3.4% | +2.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.