Figures computed from official regulatory filings — .
Ask the machine
Search and compare insider transactions, companies and their statistics in plain language. Your question becomes a query over available data, not a conversation or investment advice.
Data for NATIONAL DENTEX CORP /MA/ only. No web search. Global per-insider statistics are excluded.
An executed search uses one credit, even with no results. Errors and unsupported questions use no credits.
Business description unavailable in our sources.
SEC company identity · Oct 5, 2026
Open-market timeline · full history
14 buys27 sellsbar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details | |
|---|---|---|---|---|---|
| BECKER RICHARD F JR | OtherD (derivative) | $258.6K | SEC | ||
| BROWN DAVID L |
| OtherD (derivative) |
| $266.7K |
| Unusual size |
| SEC |
| GREEN JOHN W | OtherD (derivative) | $133.3K | SEC |
| COLL WAYNE M | OtherD (derivative) | $116.7K | Unusual size | SEC |
| BROWN DAVID L | OtherD (derivative) | $204.8K | Unusual size | SEC |
| BECKER RICHARD F JR | OtherD (derivative) | $133.3K | SEC |
| BROWN DAVID L | OtherD (derivative) | $387.9K | Unusual size | SEC |
| COLL WAYNE M | OtherD (derivative) | $2K | Unusual size | SEC |
| COLL WAYNE M | OtherD (derivative) | $258.6K | Unusual size | SEC |
| COLL WAYNE M | Other | $143.8K | Unusual size | SEC |
| BROWN DAVID L | Other | $1.2M | Unusual size | SEC |
| BROWN DAVID L | OtherD (derivative) | $43.6K | Unusual size | SEC |
| BROWN DAVID L | OtherD (derivative) | $9.9K | Unusual size | SEC |
| COLL WAYNE M | OtherD (derivative) | $10.9K | Unusual size | SEC |
| GREEN JOHN W | OtherD (derivative) | $258.6K | SEC |
| BECKER RICHARD F JR | Other | $523.2K | SEC |
| BROWN DAVID L | OtherD (derivative) | $332.1K | Unusual size | SEC |
| COLL WAYNE M | OtherD (derivative) | $9.2K | Unusual size | SEC |
| BECKER RICHARD F JR | OtherD (derivative) | $43.6K | SEC |
| GREEN JOHN W | Other | $655.9K | Unusual size | SEC |
| BECKER RICHARD F JR | OtherD (derivative) | $9.9K | SEC |
| COLL WAYNE M | OtherD (derivative) | $215.3 | Unusual size | SEC |
| BECKER RICHARD F JR | OtherD (derivative) | $47.3K | SEC |
| CROSBY JACK R | Other | $162.1K | SEC |
| CALLAHAN THOMAS Etrack record | Other | $432K | SEC |