---
schema_version: "secwatch.filing_event.v1"
accession: "0001443669-26-000006"
form_type: "8-K/A"
ticker: "PRLB"
cik: "0001443669"
company_name: "Proto Labs Inc"
filed_at: "2026-02-06T23:59:59+00:00"
generated_at: "2026-05-16T04:04:13.451498+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Proto Labs corrects Q1 2026 GAAP diluted EPS guidance to $0.18-$0.26

## Summary
- Correction of scrivener's error in Q1 2026 GAAP diluted EPS guidance: previously $0.17-$0.25, now $0.18-$0.26.
- No other changes to the original February 6, 2026 earnings release.
- Amendment filed solely to fix this error.

## SEC filing metadata
- accession: 0001443669-26-000006
- form_type: 8-K/A
- ticker: PRLB
- cik: 0001443669
- company_name: Proto Labs Inc
- filed_at: 2026-02-06T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1443669/000144366926000006/0001443669-26-000006-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1443669/000144366926000006/prlb-20260206.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001443669-26-000006
- JSON: https://secwatch.observer/filing/0001443669-26-000006.json
- Plain text: https://secwatch.observer/filing/0001443669-26-000006.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.