Corporate insider
Schumacher Daniel
PRLBHoldLens InsiderScore
-42
Net insider selling
Buys
0
$0
Sells
3
$903K
Dominant
sell
Confidence
30%
Transaction history
| Date | Action | Shares | Price | Value |
|---|---|---|---|---|
| Sep 24, 2026 | SELL | 5,000 | $95.3209 | $477K |
| Sep 17, 2026 | SELL | 4,900 | $85.2113 | $418K |
| Sep 16, 2026 | SELL | 100 | $85 | $9K |
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Every tracked officer at PRLB — aggregate InsiderScore + all Form 4s.
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Every tracked Form 4 across all companies, chronological.
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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