William Francis Ballhaus Jr.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: OSI Systems Inc., 3 years.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
OSI Systems Inc. December 11, 202582.6%
-
OSI Systems Inc. December 12, 202497.3%
-
OSI Systems Inc. December 12, 202394.1%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Jul 20, 2026 | OSI Systems Inc. | Grant or award | +924 | $216.65 | $200,185 |
| Nov 4, 2025 | OSI Systems Inc. | Gift | −750 | — | — |
| Sep 12, 2025 | OSI Systems Inc. | Open-market sale | −562 | $237.84 | $133,666 |
| Aug 20, 2025 | OSI Systems Inc. | Grant or award | +1,007 | $223.39 | $224,954 |
| Aug 20, 2025 | OSI Systems Inc. | Grant or award | +1,007 | $223.39 | $224,954 |
| Aug 20, 2025 | OSI Systems Inc. | Grant or award | +1,007 | $223.39 | $224,954 |
| Jul 9, 2025 | OSI Systems Inc. | Gift | −113 | — | — |
| May 21, 2025 | OSI Systems Inc. | Open-market sale | −750 | $228.88 | $171,660 |
| May 6, 2025 | OSI Systems Inc. | Open-market sale | −933 | $219.77 | $205,045 |
| Feb 10, 2025 | OSI Systems Inc. | Gift | −750 | — | — |
| Dec 10, 2024 | OSI Systems Inc. | Open-market sale | −675 | $181.63 | $122,600 |
| Dec 10, 2024 | OSI Systems Inc. | Gift | −28 | — | — |
| Dec 4, 2024 | OSI Systems Inc. | Gift | −120 | — | — |
| Nov 13, 2024 | OSI Systems Inc. | Gift | −875 | — | — |
| Aug 14, 2024 | OSI Systems Inc. | Grant or award | +1,618 | $139.02 | $224,934 |
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