Robin Diamonte is Director at Morningstar, Inc. (MORN). They have made 4 open-market trades across 1 company since 2021, most recently 2026-05-15.
CIK 0001660012
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 4 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MORN | 11,338 | $2.8M |
Shares reported on the most recent Form 4, priced at the 2026-05-19 close.
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.