William M. Webster IV - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
William M. Webster IV is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days.
Profile
William M. Webster IV holds the role of Director at GOLUB CAPITAL BDC, Inc. (GBDC). Webster has reported 1 insider filing with the SEC since 2024. The most recent filing was in December 2024.
| Role | Director |
|---|---|
| Notability | 26/100 |
Board memberships
- GOLUB CAPITAL BDC, Inc.
Reported roles
- Director
Trading Pattern
InsiderAlpha's records for William M. Webster IV go back to 2024: 1 primary Form 4 filing, an average of 0.3 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 M. Webster IV 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.
- Director at GOLUB CAPITAL BDC, Inc. (GBDC) - 1 filing, 2024
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2024-12-23 | GBDC | GOLUB CAPITAL BDC, Inc. | G - Bona-fide gift | 7.1K | $0.00 |
Most Active Insiders Right Now
William M. Webster IV has no recent co-filers at the same companies, so here are the insiders with the largest open-market activity across the market in the last 90 days.
- Magnetar Financial LLC - $8.53B of CRWV open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $7.98B of SVRE open-market activity in the last 90 days
- AI Alpine (Luxembourg) S.a.r.l. - $2.69B of INIO open-market activity in the last 90 days
- SGF FANG Holdings, LP - $2.04B of FANG open-market activity in the last 90 days
- BCP 8 Holdings Mozart Manager L.L.C. - $1.22B of MDLN open-market activity in the last 90 days
- BX Mozart ML-2 Holdco L.P. - $1.22B of MDLN open-market activity in the last 90 days
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
- Mahkam Zanganeh
- A-6684 Ltd.
Frequently Asked Questions
Who is William M. Webster IV?
William M. Webster IV holds the role of Director at GOLUB CAPITAL BDC, Inc. (GBDC). Webster has reported 1 insider filing with the SEC since 2024. The most recent filing was in December 2024.…
Where can I see all of William M. Webster IV'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 M. Webster IV profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.