Updated Jul 16, 2026
Williams Gregg has filed 4 SEC Form 4 filings across 1 company in the last 90 days — buying. Lifetime open-market purchases: $26.28M. Historical track record: 4/5 stars across 29 tracked purchases.
Gregg Williams is a corporate executive and director associated with Vivani Medical, Inc. He has been involved in the medical technology sector, contributing to the development and management of innovative medical solutions. Specific details about his career history and achievements are not widely documented.
| Role | Director, 10% Owner |
|---|---|
| Notability | 10/100 |
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.
| InsiderAlpha rating | ★★★★☆ (4/5) |
|---|---|
| Total purchases tracked | 29 |
| Purchases with forward-return data | 29 |
| 30-day win rate | 5517% |
| 90-day win rate | 6207% |
| Avg 5-day return | +806.24% |
| Avg 30-day return | +223.63% |
| Avg 90-day return | +1342.99% |
| Best 30-day return | +1386.14% |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-16 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 793.6K | $1.26 | $1000K |
| 2026-06-16 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.59M | $1.26 | $2.00M |
| 2026-05-19 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.59M | $1.26 | $2.00M |
| 2026-04-16 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.59M | $1.26 | $2.00M |
| 2026-03-16 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 264.6K | $1.26 | $333K |
| 2026-03-16 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.31M | $1.03 | $1.35M |
| 2026-02-17 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 264.6K | $1.26 | $333K |
| 2026-02-17 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.60M | $1.03 | $1.65M |
| 2026-01-28 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.35M | $1.48 | $2.00M |
| 2026-01-20 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 264.6K | $1.26 | $333K |
| 2026-01-20 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.47M | $1.12 | $1.65M |
| 2025-12-16 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 264.6K | $1.26 | $333K |
| 2025-12-16 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.47M | $1.12 | $1.65M |
| 2025-10-15 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 264.6K | $1.26 | $333K |
| 2025-10-15 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.47M | $1.12 | $1.65M |
| 2025-09-15 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 595.2K | $1.26 | $750K |
| 2025-09-15 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 1.47M | $1.12 | $1.65M |
| 2025-05-14 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 2.4K | $1.01 | $2K |
| 2025-05-14 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 6.8K | $1.01 | $7K |
| 2025-05-14 | VANI | Vivani Medical, Inc. | P — Open-market purchase | 3.5K | $1.01 | $4K |
Gregg Williams is a corporate executive and director associated with Vivani Medical, Inc. He has been involved in the medical technology sector, contributing to the development and management of innovative medical solutions. Specific details about his career history and achievements are not widely documented.…
4 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 33 open-market purchases ($26.28M) and 0 open-market sales () across all tracked filings.
Across 29 tracked purchases, Williams Gregg averaged +223.6% avg 30-day return with a 5517% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.
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.
Open the live Williams Gregg profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.