Nathan Mark Gronberg is CAO & VP +1 at VAIL RESORTS INC (MTN). They have made 1 open-market trade across 1 company since 2021, most recently 2026-09-30.
CIK 0001826321
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 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MTN | 2,473 | $374K |
Shares reported on the most recent Form 4, priced at the 2026-10-01 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MTN | SELL | 2021-09-29 | 2021-09-30 | $343.89 | $120K | +0.8% | +5.3% | -1.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.