§ MACHINERY
USD · MachineryPRLB
PROTO LABS INC
USDSector · MachineryBeta · 1.42
§ 01 · PRICE
Price action
1D5D1M6MYTD1YMAX
§ 03 · SIGNAL STACK · WHAT THE INPUTS SAY
13F FLOW
148 increased/new, 94 decreased/exited (13F)
AC 13F Analysis
§ 04 · FUNDAMENTALS · THE BOOKS
| P/E | 69.1 | P/B | 1.78 |
| EPS (TTM) | 1.06 |
§ 05 · WHO OWNS IT
Top institutional holders
| Fund | Shares | % port | Δ Q/Q |
|---|---|---|---|
| BlackRock, Inc. | 3.7M | 0.0% | +2% |
| DISCIPLINED GROWTH INVESTORS INC /MN | 2.5M | 2.9% | −7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.5M | n/a | n/a |
| Dimensional Fund Advisors | 1.3M | 0.0% | −0% |
| State Street | 1.1M | 0.0% | +0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.0M | n/a | n/a |
◇ AC INTELLIGENCE
Top institutional owners for PRLB as of the most recent 13F reporting period (Q1 2026 · Period ended Mar 31). Δ Q/Q reflects share-count change vs. the prior filing — positive green means adding, negative red means trimming. Cross-reference with the ownership-mix bars below to see which strategy cohort is driving the flow.
§ 06 · WHO OWNS IT · BY STRATEGY
OTHER98.6% · 1 holder
OTHER0.6% · 169 holders
PASSIVE / INDEX0.3% · 10 holders
QUALITY / COMPOUNDER0.2% · 19 holders
DEALER / BANK0.1% · 28 holders
SYSTEMATIC / QUANT0.1% · 10 holders
INCOME / DEFENSIVE0.0% · 22 holders
ACTIVIST0.0% · 1 holder
TACTICAL / MACRO0.0% · 3 holders
◇ AC INTELLIGENCE
Ownership mix by behavioral cohort. Top bars indicate which style of capital dominates the float — passive indexing, quality compounders, dealer/bank, systematic quant, etc. Big quality-compounder share means concentrated active conviction; heavy passive share means flows are dictated by index rebalances, not fundamentals.
§ 07 · INSIDER ACTIVITY · LAST 180 DAYS
NO INSIDER FILINGS
◇ AC INTELLIGENCE
No Form 4 filings on record for PRLB in the last 180 days.
§ 08 · COVERAGE · OUR RECENT NOTES
No notes mention PRLB yet.