# 2026-11658: Cement Merger Blocked Unless Plants Are Sold Off in California

2026-11658, United States, et al. v. Taiheiyo Cement Corporation, et al.; Proposed Final Judgment and Competitive Impact Statement, is a Federal Register notice from Justice Department, Antitrust Division published 2026-06-11; PRIA reads it as touching household money (as of 2026-06-18).

- Canonical: https://policyrisk.com/federal-register/2026-11658
- As of: 2026-06-18
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-11658
- Title: United States, et al. v. Taiheiyo Cement Corporation, et al.; Proposed Final Judgment and Competitive Impact Statement
- Type: Notice
- Agencies: Justice Department; Antitrust Division
- Citation: 91 FR 35557
- Published: 2026-06-11
- Effective: unknown
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-06-18

## In one line

Cement Merger Blocked Unless Plants Are Sold Off in California

## Summary

The U.S. government is stepping in to stop Taiheiyo Cement and CalPortland from buying Vulcan Material’s ready-mix concrete plants in California because it could hurt competition. To keep things fair, the companies must sell off several plants, trucks, and property rights in Escondido, Oceanside, and Lakeside. People have 60 days to share their thoughts before the deal is finalized, keeping the concrete market strong and fair.

## Effects PRIA read

- Court-ordered divestiture of local plants: benefit, medium. The Department of Justice and State of California required Taiheiyo/CalPortland and Vulcan to sell specific ready-mix concrete assets in San Diego County, including plants at 550 North Tulip Street (Escondido), 1050 West Airport Road (Oceanside), lease interests in the Lakeside plant at 12494 CA-67…
- Acquisition would likely raise local concrete prices: cost, medium. The government alleges CalPortland's planned purchase of Vulcan's California ready-mix assets for approximately $712 million would combine two of the largest suppliers in San Diego County, giving them a combined market share of over 50 percent. The Complaint says that, absent divestiture, the deal…
- Protections and hiring rules for plant employees: benefit, medium. The Final Judgment requires Defendants to help an approved buyer hire Relevant Personnel from the Escondido, Oceanside, and Lakeside plants, provide personnel lists within 10 business days, and, for employees who join the buyer within 180 days of the divestiture, waive non-competes, vest and pay pr…

## Related documents

- [2026-19100](https://policyrisk.com/federal-register/2026-19100): United States of America, et al. v. RealPage, Inc., et al.; Proposed Final Judgment and Competitive Impact Statement, 2026-09-18
- [2026-18136](https://policyrisk.com/federal-register/2026-18136): United States v. KKR & Co. Inc., et al.; Proposed Final Judgment and Competitive Impact Statement, 2026-09-04
- [2026-16850](https://policyrisk.com/federal-register/2026-16850): United States of America, et al. v. CRH PLC, et al. Proposed Final Judgment and Competitive Impact Statement, 2026-08-19
- [2026-16112](https://policyrisk.com/federal-register/2026-16112): United States et al. v. Cal-Maine Foods, Inc. et al.; Proposed Final Judgment and Competitive Impact Statement, 2026-08-07
- [2026-14903](https://policyrisk.com/federal-register/2026-14903): United States, et al. v. OhioHealth Corporation; Proposed Final Judgment and Competitive Impact Statement, 2026-07-23
- [2026-14935](https://policyrisk.com/federal-register/2026-14935): United States v. Edwards LifeSciences Corp. and Genesis MedTech Group Limited; Proposed Final Judgment and Competitive Impact Statement, 2026-07-23

## Sources
- [2026-11658 on federalregister.gov](https://www.federalregister.gov/documents/2026/06/11/2026-11658/united-states-et-al-v-taiheiyo-cement-corporation-et-al-proposed-final-judgment-and-competitive)
- [2026-11658 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-06-11/pdf/2026-11658.pdf)

## Related
- [Previous: 2026-11657, Franklin Resources, Inc.](https://policyrisk.com/federal-register/2026-11657)
- [Next: 2026-11659, R.J. Corman Railroad Company/Cleveland Line-Lease and Operation Exemption With…](https://policyrisk.com/federal-register/2026-11659)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-11658 (as of 2026-06-18).