Company insider activity
BOLD — insider activity
BOLD — 7 tracked Form 4 transactions across 1 distinct insider. Scored on HoldLens's signed −100..+100 InsiderScore.
HoldLens InsiderScore
+78
Heavy insider buying
Buys
7
$401K
Sells
0
$0
Cluster
No
3+ officers · 30d
Confidence
70%
sample × size
All tracked transactions
| Insider | Action | Value |
|---|---|---|
| TANG KEVIN | BUY | $23K |
| TANG KEVIN | BUY | $15K |
| TANG KEVIN | BUY | $14K |
| TANG KEVIN | BUY | $521.4 |
| TANG KEVIN | BUY | $43K |
| TANG KEVIN | BUY | $30K |
| TANG KEVIN | BUY | $277K |
Related
BOLD ConvictionScore
Full 13F + InsiderScore unified signal for BOLD.
Live insider feed
Every tracked Form 4 across all companies, chronological.
Insider methodology
How InsiderScore is computed — role, action, recency, cluster bonus.
Deep dive
Reading for your research
Optional background reading on interpreting company disclosures and investing methods. These books do not validate a signal or predict returns.
Amazon affiliate links — as an Amazon Associate, HoldLens earns from qualifying purchases and membership trials at no extra cost to you. These are books we genuinely recommend. Not investment advice; always do your own research.
Benjamin Graham
The Intelligent Investor
The foundational text. Buffett calls it 'by far the best book about investing ever written.'
See price on Amazon
Benjamin Graham & David Dodd
Security Analysis
The deep dive behind The Intelligent Investor — how to actually read a filing and value a business.
See price on Amazon
See the full investing reading list
More by topic:Foundations