---
schema_version: "secwatch.filing_event.v1"
accession: "0000352825-23-000031"
form_type: "8-K"
ticker: "FSTR"
cik: "0000352825"
company_name: "FOSTER L B CO"
filed_at: "2023-03-06T23:59:59+00:00"
generated_at: "2026-06-18T12:19:25.698008+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# L.B. Foster Q4 net loss $43.9M on $37.9M tax allowance; adj EBITDA up 133%; guides 2023 sales $540-570M

## Summary
- Q4 net sales $137.2M (+21.4% YoY); net loss $43.9M ($4.09/diluted) includes $37.9M deferred tax valuation allowance and $8.0M impairment.
- Q4 adjusted EBITDA $7.5M (+132.6% YoY); full year adj EBITDA $24.2M (+29.4%).
- 2023 guidance: net sales $540-570M, adjusted EBITDA $27-31M.
- Board authorized $15M stock buyback through Feb 2026, limited to $5M per trailing 12 months.
- Backlog $272.3M near all-time high; Q4 new orders $137.8M (+44.8% YoY).

## SEC filing metadata
- accession: 0000352825-23-000031
- form_type: 8-K
- ticker: FSTR
- cik: 0000352825
- company_name: FOSTER L B CO
- filed_at: 2023-03-06T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/352825/000035282523000031/0000352825-23-000031-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/352825/000035282523000031/fstr-20230306.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000352825-23-000031
- JSON: https://secwatch.observer/filing/0000352825-23-000031.json
- Plain text: https://secwatch.observer/filing/0000352825-23-000031.txt

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