Company insider activity
ZLAB — insider activity
ZLAB — 11 tracked Form 4 transactions across 3 distinct insiders. Scored on HoldLens's signed −100..+100 InsiderScore.
HoldLens InsiderScore
-23
Net insider selling
Buys
3
$174K
Sells
8
$2.08M
Cluster
No
3+ officers · 30d
Confidence
64%
sample × size
All tracked transactions
| Insider | Action | Value |
|---|---|---|
| Chen Yajing | SELL | $0 |
| Chen Yajing | SELL | $8K |
| Chen Yajing | BUY | $0 |
| Edmondson Frazor Titus III | SELL | $71K |
| Du Ying | SELL | $0 |
| Du Ying | SELL | $1.00M |
| Du Ying | BUY | $87K |
| Du Ying | SELL | $0 |
| Du Ying | SELL | $683K |
| Du Ying | SELL | $316K |
| Du Ying | BUY | $87K |
Related
ZLAB ConvictionScore
Full 13F + InsiderScore unified signal for ZLAB.
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.'
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Benjamin Graham & David Dodd
Security Analysis
The deep dive behind The Intelligent Investor — how to actually read a filing and value a business.
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See the full investing reading list
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