📄 What This Document Is

This is an 8-K filing, which is a report companies file with the SEC to announce major news that investors should know about. This specific announcement is a press release sharing a key update on a major bank merger: Prosperity Bancshares is in the process of buying Stellar Bancorp.

The big news here? All the necessary government regulators have given their thumbs-up for the deal to move forward. 👉 This is a huge hurdle cleared, meaning the merger is on track and likely to happen.

🏢 The Two Banks Involved

Let's break down who's who in this deal:

Prosperity Bancshares (NYSE: PB)

The Buyer: A large regional bank based in Houston, Texas.
In simple terms: Think of a well-established, bigger bank with over 300 branches across Texas and Oklahoma.
Size: As of Dec 31, 2025, it's a $38.463 billion company.

Stellar Bancorp, Inc. (NYSE: STEL)

The Target: A smaller, Houston-based bank holding company.
In simple terms: A bank focused on business and personal customers in key Texas cities like Houston and Dallas.
What's happening: Its bank, Stellar Bank, will be merged into Prosperity Bank.

🎉 The Big Announcement: Regulatory OK

The core of this filing is the announcement that the regulatory approvals are complete. Here’s what got approved:

The Federal Reserve Bank of Dallas granted a waiver for the merger of the parent holding companies.
The FDIC and the Texas Department of Banking approved the plan to merge Stellar Bank into Prosperity Bank.

👉 Why it matters: For bank mergers, getting approval from these specific regulators (the Fed for the holding company, and the FDIC/state for the actual bank) is mandatory. With this done, the biggest external obstacles are out of the way. The rest of the process is mostly in the hands of the companies and their shareholders.

🗓️ The Road Ahead: Key Dates & Next Steps

The merger has a clear timeline now:

Special Shareholder Meeting: Stellar shareholders will vote on the deal on May 27, 2026.
Expected Closing: The acquisition is targeted to be finalized on or about July 1, 2026.

The closing still depends on Stellar shareholders voting "yes" and other standard conditions being met, but the green light from regulators makes this final outcome much more certain.

📜 Where to Find the Fine Print

This press release is just an update. All the crucial, detailed documents about the deal have already been filed with the SEC. This includes:

The official merger agreement (dated Jan 27, 2026).
A combined proxy statement/prospectus (which explains the deal and is also a ballot for shareholders). The final version was filed on April 21, 2026, and will be mailed to Stellar shareholders around April 23, 2026.

👉 Action for investors: If you're a Stellar shareholder, you should read those documents carefully before voting. They contain all the risks, benefits, and legal details.

⚖️ Big Picture: Strengths & Risks

👍 Strengths / Why This Deal is Happening:

Strategic Fit: It's a classic regional bank merger, combining forces to create a larger, more efficient bank in the competitive Texas market.
Regulatory Hurdle Cleared: This news removes a major source of uncertainty. Regulators have judged the combination to be safe and sound for the financial system.
Clear Timeline: Having a projected closing date (July 1) helps everyone plan.

⚠️ Risks & What Could Still Go Wrong:

Shareholder Vote: The deal still requires approval from Stellar's shareholders at the May 27 meeting. While expected, it's not guaranteed.
Closing Conditions: The merger agreement includes other "customary closing conditions." If something unexpected and material happens before July 1, it could delay or derail the closing.
Integration Risk: Any merger faces challenges in combining systems, staff, and cultures. Success isn't automatic after the legal sign-off.

🧠 The Analogy

Think of this merger like buying a house. Prosperity (the buyer) has already:

Had their offer accepted (the initial merger agreement).
Gotten final approval from the bank for the mortgage (the regulatory approvals announced here).

The only big step left is the final walk-through and signing at closing (the shareholder vote and final closing on July 1). This announcement is the phone call from the realtor saying, "The financing is fully approved—we're on track for closing day!"

🧩 Final Takeaway

The Prosperity-Stellar bank merger has passed its most significant external test with regulatory approval. The deal is now on a clear, short path to completion, pending a routine shareholder vote in late May. This news significantly de-risks the transaction and moves it from "pending approval" to "on track to close this summer."

Prosperity Gets Regulatory Approval to Acquire Stellar Bancorp