---
schema_version: "secwatch.filing_event.v1"
accession: "0001604028-26-000009"
form_type: "8-K"
ticker: "WMS"
cik: "0001604028"
company_name: "ADVANCED DRAINAGE SYSTEMS, INC."
filed_at: "2026-02-12T23:59:59+00:00"
generated_at: "2026-05-16T03:01:55.315065+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Advanced Drainage Systems proposes $500M senior notes offering to refinance debt and amend credit facility

## Summary
- Up to $500M aggregate principal amount of senior unsecured notes due 2034 offered in private transaction.
- Plans to amend credit facility: revolver from $600M to $750M, term loan B from $408M to $600M, extend maturity.
- Proceeds to refinance existing credit facility and redeem all outstanding 5.000% senior notes due 2027.
- Notes guaranteed by domestic subsidiaries; offering not conditioned on credit facility amendment.
- Offering exempt from registration under Rule 144A and Regulation S; not a public offer.

## SEC filing metadata
- accession: 0001604028-26-000009
- form_type: 8-K
- ticker: WMS
- cik: 0001604028
- company_name: ADVANCED DRAINAGE SYSTEMS, INC.
- filed_at: 2026-02-12T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1604028/000160402826000009/0001604028-26-000009-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1604028/000160402826000009/wms-20260212.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001604028-26-000009
- JSON: https://secwatch.observer/filing/0001604028-26-000009.json
- Plain text: https://secwatch.observer/filing/0001604028-26-000009.txt

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