Mark E. Mlotek is VP at SCHEIN HENRY INC (HSIC). They have made 28 open-market trades across 1 company since 2006, most recently 2026-03-16.
CIK 0001194352
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 28 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| HSIC | 98,372 | $8.5M |
Shares reported on the most recent Form 4, priced at the 2026-03-17 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| HSIC | SELL | 2026-03-04 | 2026-03-06 | $80.80 | $479K | -4.8% | -2.6% | -0.7% |
| HSIC | SELL | 2024-08-14 | 2024-08-15 | $69.12 | $207K | +3.8% | +0.5% | -2.6% |
| HSIC | SELL | 2023-05-19 | 2023-05-23 | $76.68 | $3.8M | +0.2% | +6.1% | +1.8% |
| HSIC | SELL | 2022-03-07 | 2022-03-08 | $86.39 | $1.1M | +1.5% | +4.1% | -2.2% |
| HSIC | SELL | 2022-02-24 | 2022-02-25 | $82.99 | $4.0M | -0.1% | +3.3% | -0.1% |
| HSIC | SELL | 2021-05-10 | 2021-05-11 | $83.02 | $2.2M | -2.2% | -1.8% | -4.8% |
| HSIC | SELL | 2018-06-12 | 2018-06-13 | $72.73 | $1.5M | +3.0% | +3.4% | +11.9% |
| HSIC | SELL | 2017-03-17 | 2017-03-20 | $170.98 | $1.9M | -0.7% | -2.3% | +7.6% |
| HSIC | SELL | 2016-11-03 | 2016-11-04 | $155.19 | $750K | +1.2% | -4.7% | +2.4% |
| HSIC | SELL | 2016-03-02 | 2016-03-03 | $167.93 | $1.7M | -0.3% | +2.4% | +2.9% |
| HSIC | SELL | 2015-11-05 | 2015-11-06 | $155.00 | $458K | -7.2% | -0.4% | -3.7% |
| HSIC | SELL | 2015-02-12 | 2015-02-13 | $142.55 | $980K | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2014-11-07 | 2014-11-10 | $128.75 | $806K | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2014-02-25 | 2014-02-26 | $119.16 | $2.4M | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2013-12-19 | 2013-12-20 | $111.97 | $2.5M | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2013-03-08 | 2013-03-12 | $89.53 | $946K | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2012-12-14 | 2012-12-17 | $79.50 | $806K | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2012-03-08 | 2012-03-12 | $73.10 | $2.7M | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2011-11-14 | 2011-11-15 | $64.81 | $1.4M | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2011-03-03 | 2011-03-07 | $69.48 | $1.4M | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2010-09-14 | 2010-09-15 | $56.23 | $1.6M | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2010-03-04 | 2010-03-08 | $56.38 | $718K | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2008-03-20 | 2008-03-21 | $57.50 | $557K | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2008-03-17 | 2008-03-18 | $55.93 | $784K | -7.2% | -0.4% | -0.4% |
| HSIC | SELL | 2007-11-30 | 2007-12-03 | $58.65 | $878K | -7.2% | -0.4% | -0.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.