---
title: "VANCE MARTHA R. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/89784e79-e148-5232-a0b3-37785bac5685
json: https://whiteintel.dev/api/public/dossier/89784e79-e148-5232-a0b3-37785bac5685
identifier: sec:0001581142
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# VANCE MARTHA R.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001581142`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/89784e79-e148-5232-a0b3-37785bac5685  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/89784e79-e148-5232-a0b3-37785bac5685  

## Ownership & control

### Holdings / subsidiaries

- **LAYNE CHRISTENSEN CO** (officer) — https://whiteintel.dev/entity/ee19d83e-3c3e-5e4f-910c-60e3bb739359

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **VANCE MARTHA R.**. Human view: https://whiteintel.dev/entity/89784e79-e148-5232-a0b3-37785bac5685 · Structured JSON: https://whiteintel.dev/api/public/dossier/89784e79-e148-5232-a0b3-37785bac5685._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._