William Francis Ballhaus Jr. - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
William Francis Ballhaus Jr. has filed 1 SEC Form 4 filing across 1 company in the last 90 days - selling. Lifetime open-market sales: $633K.
Profile
William Francis Ballhaus Jr. is a corporate insider at OSI SYSTEMS INC (OSIS). Ballhaus has reported 13 insider filings with the SEC since 2024. The most recent filing was in July 2026.
| Role | Insider |
|---|---|
| Notability | 20/100 |
Board memberships
- OSI SYSTEMS INC
Awards & honors
- Leadership at OSI Systems Inc
- Involvement in electronic systems innovation
Trading Pattern
InsiderAlpha's records for William Francis Ballhaus Jr. go back to 2024: 11 primary Form 4 filings, an average of 3.7 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role William Francis Ballhaus Jr. has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Insider at OSI SYSTEMS INC (OSIS) - 11 filings, 2024 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-21 | OSIS | OSI SYSTEMS INC | A - Grant or award | 924 | $216.65 | $200K |
| 2025-11-06 | OSIS | OSI SYSTEMS INC | G - Bona-fide gift | 750 | $0.00 | |
| 2025-09-12 | OSIS | OSI SYSTEMS INC | S - Open-market sale | 562 | $237.84 | $134K |
| 2025-08-20 | OSIS | OSI SYSTEMS INC | A - Grant or award | 1.0K | $223.39 | $225K |
| 2025-07-09 | OSIS | OSI SYSTEMS INC | G - Bona-fide gift | 113 | $0.00 | |
| 2025-05-21 | OSIS | OSI SYSTEMS INC | S - Open-market sale | 750 | $228.88 | $172K |
| 2025-05-06 | OSIS | OSI SYSTEMS INC | S - Open-market sale | 933 | $219.77 | $205K |
| 2024-12-12 | OSIS | OSI SYSTEMS INC | G - Bona-fide gift | 28 | $0.00 | |
| 2024-12-12 | OSIS | OSI SYSTEMS INC | S - Open-market sale | 675 | $181.63 | $123K |
| 2024-12-06 | OSIS | OSI SYSTEMS INC | G - Bona-fide gift | 120 | $0.00 | |
| 2024-11-15 | OSIS | OSI SYSTEMS INC | G - Bona-fide gift | 875 | $0.00 | |
| 2024-10-08 | OSIS | OSI SYSTEMS INC | G - Bona-fide gift | 73 | $0.00 | |
| 2024-10-08 | OSIS | OSI SYSTEMS INC | G - Bona-fide gift | 73 | $0.00 | |
| 2024-10-08 | OSIS | OSI SYSTEMS INC | G - Bona-fide gift | 73 | $0.00 |
Companies - Last 90 Days
- OSI SYSTEMS INC (OSIS) - 1 filing, last 2026-07-21
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies William Francis Ballhaus Jr. has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Deepak Chopra - $21.29M of OSIS open-market activity in the last 12 months
- Paul Keith Morben - $512K of OSIS open-market activity in the last 12 months
- James B. Hawkins - $425K of OSIS open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Gregg Williams
- Stephen T. Wills
- WINMILL CO. INC
- Caroline Young
- Jeffrey Yu
- George Raymond Zage III
- Payam Zamani
- Mahkam Zanganeh
Frequently Asked Questions
Who is William Francis Ballhaus Jr.?
William Francis Ballhaus Jr. is a corporate insider at OSI SYSTEMS INC (OSIS). Ballhaus has reported 13 insider filings with the SEC since 2024. The most recent filing was in July 2026.…
How many SEC Form 4 filings has William Francis Ballhaus Jr. submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has William Francis Ballhaus Jr. been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($633K) across all tracked filings.
Where can I see all of William Francis Ballhaus Jr.'s SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live William Francis Ballhaus Jr. profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.