In Chicago’s concrete world, the usually buttoned‑up Ozinga clan is suddenly in open conflict. Two brothers have hauled their siblings and the company’s CEO into court, alleging leadership cut corners to rush a roughly $50 million acquisition and threatening to upend control of the near‑100‑year‑old family business.
The Cook County lawsuit asks a judge to lock down the cash earmarked for the deal ahead of a February 28 closing, casting the dispute as a high‑stakes showdown over who really calls the shots inside one of the region’s most influential construction suppliers.
What the suit says
According to The Real Deal, brothers Justin and Karl Ozinga filed the complaint on Wednesday, accusing CEO Martin “Marty” Ozinga IV of trying to sidestep a requirement that the family trust sign off unanimously on major investments. The lawsuit seeks emergency injunctive relief and asks the court to freeze funds the brothers say were set aside for the acquisition.
Their attorney, John C. Sciaccotta, framed the filing as a last‑ditch effort to keep the family business on what his clients see as its intended track, saying, “Our clients filed this lawsuit in order to protect their legacy, their inheritance, and, ultimately, to protect the Ozinga family of companies.”
Family trust and real estate bets
At the center of the fight is the Ozinga Children’s Investment Trust, created by family patriarch Martin Ozinga III, who died in 2021. The trust structure, as described in the family obituary and recapped by The Chicago Sun-Times, requires unanimous approval from a Special Fiduciary Committee before major investments can move forward.
Beyond concrete, the family has been backing ambitious real estate plays. Its investment arm is a financial supporter of The Invert, a controversial proposal for a 6 million‑square‑foot underground commercial complex on the Southeast Side. Project details are laid out on the development’s own site at The Invert, with additional reporting from outlets including Bisnow.
Grinding mill, rising costs, and refinancing
While the family navigates its internal rift, Ozinga has been pushing ahead with industrial expansion. Trade publications report the company has broken ground on a low‑carbon grinding mill in East Chicago, designed to produce 1 million tons per year and anchored by a large Gebr. Pfeiffer vertical‑roller mill, with an expected opening in 2026. CemNet has detailed the equipment and projected jobs tied to the project.
The lawsuit, however, paints that mill as a financial stress test. The complaint alleges the project’s budget ballooned from an initial $65 million to more than $150 million by the end of 2025 and that Ozinga was pushed into an expensive refinancing to keep things moving. The filings also claim a lender now requires personal guarantees from individual owners, a point highlighted in the court papers and reported by The Real Deal.
Why it matters to Chicago
This is not just a family squabble over boardroom etiquette. Ozinga is a key supplier of concrete across the Chicago region and has positioned itself as a developer and investor on the Southeast Side. What happens in this case could ripple out to job sites, industrial projects and local supply chains that rely on a steady flow of ready‑mix.
Environmental and neighborhood advocates have already been wary of The Invert and its mining‑adjacent implications on the Southeast Side, as NRDC has reported. The plaintiffs argue that the disputed acquisition and the company’s recent credit maneuvers could expose individual family owners to serious personal financial risk. Company representatives, for their part, have told reporters that operations are continuing as usual.
Legal implications
The brothers are asking the court for injunctive relief that would halt the acquisition and freeze the contested funds while the lawsuit plays out. If a judge agrees, the deal effectively goes on ice until the legal questions are sorted.
If the court denies that request and the acquisition closes as scheduled, the plaintiffs warn in their filings that unwinding the transaction later could be messy and expensive. They also underscore what they see as a practical risk for each brother if the lender’s personal‑guarantee requirement sticks, turning the case into a broader fight over governance standards as much as raw dollars.
The suit was filed this week, with court scheduling expected to follow quickly. With a February 28 “drop‑dead” date looming on the transaction calendar, the coming days will decide whether the Ozinga name continues as a unified, quietly dominant presence on Midwestern job sites or steps into a more public, litigated chapter of its long Chicago story.
