Stockbridge Master Fund (OS), L.P. is 10% Owner at MATTRESS FIRM HOLDING CORP. (MFRM). They have made 2 open-market trades across 1 company since 2016, most recently 2016-04-12.
CIK 0001522786
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.
2 open-market purchases totalling $4.7M since 2016, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MFRM | 25,730 | $1.6M |
Shares reported on the most recent Form 4, priced at the 2016-04-13 close.
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.