Summary
Updated Aug 31, 2026
Gregg R. Honigblum is Chief Investment Officer, Director of Sintx Technologies, Inc. (SINT). 6 SEC Form 4 filings on record going back to 2025, most recently on 11 February 2026. Most recent open-market trade: bought $21K of SINT on 9 December 2025. Lifetime open-market purchases: $525K. Historical track record: 4/5 stars across 31 tracked purchases.
Recent Transactions
20Every recent SEC Form 4 transaction Gregg R. Honigblum has reported, most recent first.
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★★☆ (4/5) |
| Total purchases tracked | 31 |
| Purchases with forward-return data | 31 |
| 30-day win rate | 52% |
| 90-day win rate | 13% |
| Avg 5-day return | +10.96% |
| Avg 30-day return | +11.93% |
| Avg 90-day return | -10.78% |
| Best 30-day return | +60.57% |
Trading Pattern
InsiderAlpha's records for Gregg R. Honigblum go back to 2025: 6 primary Form 4 filings, an average of 3.0 per year. The typical open-market purchase is $17K (31 buys totaling $525K). The largest single buy on record is $21K of SINT in 2025. 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.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Gregg R. Honigblum files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Christopher Michael Lyons - $24K of SINT open-market activity in the last 12 months
- Eric K. Olson - $20K of SINT open-market activity in the last 12 months
- Mark Lewis Anderson - $9K of SINT open-market activity in the last 12 months
- Jay M. Moyes - $3K of SINT open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Gregg R. Honigblum?
Gregg R. Honigblum is a corporate insider, tracked as Chief Investment Officer, Director of Sintx Technologies, Inc. (SINT). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Gregg R. Honigblum last file a Form 4?
The most recent primary Form 4 on record is dated 11 February 2026, one of 6 filings going back to 2025.
Has Gregg R. Honigblum been buying or selling stock?
Recorded transactions: 31 open-market purchases ($525K) and 0 open-market sales across all tracked filings.
How accurate is Gregg R. Honigblum's historical track record?
Across 31 tracked purchases, Gregg R. Honigblum averaged +11.9% avg 30-day return with a 52% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.
Where can I see all of Gregg R. Honigblum'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
Follow Gregg R. Honigblum and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial