---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-121209"
form_type: "8-K"
ticker: "CDNL"
cik: "0002079999"
company_name: "Cardinal Infrastructure Group Inc."
filed_at: "2025-12-12T23:59:59+00:00"
generated_at: "2026-05-16T13:25:09.991873+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Cardinal Infrastructure Group completes IPO of 13.2M shares at $21, gross proceeds $277.7M

## Summary
- Completed IPO of 11,500,000 shares at $21.00 per share on Dec 11, 2025; over-allotment of 1,725,000 shares on Dec 12.
- Gross proceeds to Company from IPO and over-allotment ~$277.7 million before underwriting discounts.
- Issued 30,887,813 shares of Class B Common Stock to pre-IPO members for nominal consideration in connection with the IPO.
- Entered into Second Amended and Restated LLC Agreement, Tax Receivable Agreement, and Registration Rights Agreement.
- Net proceeds used to purchase newly issued Common Units from Cardinal Civil Contracting Holdings LLC.

## SEC filing metadata
- accession: 0001213900-25-121209
- form_type: 8-K
- ticker: CDNL
- cik: 0002079999
- company_name: Cardinal Infrastructure Group Inc.
- filed_at: 2025-12-12T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 3.02, 3.03, 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2079999/000121390025121209/0001213900-25-121209-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2079999/000121390025121209/ea0268785-8k_cardinal.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-121209
- JSON: https://secwatch.observer/filing/0001213900-25-121209.json
- Plain text: https://secwatch.observer/filing/0001213900-25-121209.txt

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