Michael B. O'Sullivan is President at ROSS STORES INC (ROST). They have made 18 open-market trades across 1 company since 2008, most recently 2026-05-04.
CIK 0001262142
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 18 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ROST | SELL | 2016-03-30 | 2016-03-31 | $58.15 | $601K | -2.6% | -0.5% | -3.7% |
| ROST | SELL | 2016-03-22 | 2016-03-24 | $58.09 | $4.5M | +1.7% | -0.9% | -5.4% |
| ROST | SELL | 2015-03-30 | 2015-04-01 | $105.46 | $444K | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2015-03-24 | 2015-03-26 | $107.08 | $7.5M | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2015-03-23 | 2015-03-24 | $106.99 | $6.1M | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2015-03-09 | 2015-03-11 | $105.05 | $1.2M | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2015-03-03 | 2015-03-05 | $105.32 | $4.0M | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2014-09-26 | 2014-09-30 | $75.60 | $756K | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2014-09-18 | 2014-09-22 | $75.58 | $8.9M | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2013-09-06 | 2013-09-09 | $69.37 | $1.4M | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2012-09-14 | 2012-09-18 | $67.91 | $3.3M | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2012-02-06 | 2012-02-08 | $51.09 | $11.3M | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2011-10-14 | 2011-10-17 | $84.00 | $420K | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2010-10-14 | 2010-10-15 | $56.10 | $709K | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2010-06-18 | 2010-06-21 | $57.51 | $684K | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2009-10-22 | 2009-10-26 | $45.99 | $343K | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2008-09-09 | 2008-09-10 | $40.80 | $144K | -1.5% | +2.6% | +2.6% |
| ROST | SELL | 2008-07-17 | 2008-07-21 | $39.67 | $2.2M | -1.5% | +2.6% | +2.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.