William Francis Ballhaus Jr. is Director at OSI SYSTEMS INC (OSIS). They have made 12 open-market trades across 1 company since 2014, most recently 2026-07-20.
CIK 0001490925
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 12 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| OSIS | 4,102 | $835K |
Shares reported on the most recent Form 4, priced at the 2026-07-21 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| OSIS | SELL | 2025-09-12 | 2025-09-15 | $237.84 | $267K | -1.9% | +8.7% | +11.1% |
| OSIS | SELL | 2025-05-21 | 2025-05-22 | $228.88 | $172K | -0.2% | -3.8% | -0.3% |
| OSIS | SELL | 2025-05-06 | 2025-05-07 | $219.77 | $410K | +2.1% | +0.7% | -2.3% |
| OSIS | SELL | 2024-12-10 | 2024-12-12 | $181.63 | $245K | -5.9% | -17.5% | -3.0% |
| OSIS | SELL | 2024-05-08 | 2024-05-09 | $133.98 | $181K | +6.6% | +1.5% | +0.7% |
| OSIS | SELL | 2023-06-14 | 2023-06-15 | $125.72 | $129K | -4.9% | -2.0% | -3.1% |
| OSIS | SELL | 2023-02-01 | 2023-02-03 | $94.96 | $38K | -1.3% | -3.5% | +22.1% |
| OSIS | SELL | 2021-03-09 | 2021-03-11 | $98.96 | $40K | -0.5% | -0.5% | -0.9% |
| OSIS | SELL | 2020-02-25 | 2020-02-25 | $89.68 | $117K | -4.4% | -20.3% | -12.4% |
| OSIS | SELL | 2019-02-04 | 2019-02-06 | $89.14 | $120K | -0.0% | -3.3% | +17.2% |
| OSIS | SELL | 2016-12-15 | 2017-08-09 | $76.12 | $67K | -1.9% | +3.2% | +11.5% |
| OSIS | SELL | 2014-09-10 | 2014-09-11 | $66.68 | $58K | -7.6% | -1.1% | -1.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.