🧾 What This Document Is

This is a Form 6-K, a report that foreign companies listed in the U.S. must file with the SEC to share important news. It's like a press release they're obligated to share with the U.S. market. This specific report, filed in March 2026, discloses a related-party transaction – essentially, a major business deal Ultrapar is doing with companies it already has a close relationship with.

👉 In simple terms: Ultrapar is telling its shareholders, "We're doing a big financial deal with some of our business partners, and here are all the details so you know it's fair."

🏢 What The Company Does

Ultrapar Participações S.A. (the Brazilian company, often shortened to Ultrapar) is a large Brazilian conglomerate. In simple terms, they are like the "Swiss Army knife" of Brazilian industry. Their main businesses include operating OXXO gas stations, distributing chemicals, and owning a stake in Ultra, which runs fuel terminals and the popular Extra/Comper supermarket chain.

They operate in energy, chemicals, and retail—sectors that are crucial to the Brazilian economy.

🤝 The Deal: A R$451 Million Financial Lifeline

The core of this filing is about a debenture issuance. Think of a debenture as a special type of loan or corporate IOU that can sometimes be turned into ownership shares.

• Who's involved? The "Issuer" is Refinaria de Petróleo Riograndense S.A. (RPR), an oil refinery. It is jointly controlled by three partners, each with a 33.20% stake:
  1. Braskem S.A. (a major petrochemical company)
  2. Petrobras (Brazil's state-controlled oil giant)
  3. Ultrapar
• What's the transaction? RPR is issuing convertible debentures worth a total of R$451,300,173.78 (about $90 million USD at typical exchange rates).
• The structure:
  • Series 1 (R$450M): The three controlling partners (Braskem, Petrobras, Ultrapar) are required to buy these, splitting the cost according to their ownership (33.2% each).
  • Series 2 (R$1.3M): These are offered to minority shareholders. If they don't buy them, this part gets cancelled.
• Key Terms:
  • Purpose: To raise money for RPR, the refinery.
  • Interest Rate: They will pay interest at CDI + 5.5% per year. CDI is Brazil's benchmark interbank rate. This is a floating rate that will go up if Brazil's interest rates go up.
  • Conversion Feature: These debentures must be converted into RPR shares by December 31, 2026. This isn't an option—it's the plan. This means the loan effectively becomes an equity investment in the refinery on that date.

⚖️ Big Picture: Why This Matters (Strengths & Risks)

👍 Strengths / Positives:

• Capital Injection: This deal provides immediate cash (R$451M) to RPR for its operations or investments without Ultrapar having to contribute new equity directly as an owner.
• Market Rate: Ultrapar states the CDI + 5.5% rate is fair and reflects market conditions. This is meant to show the deal is "arm's-length"—meaning it was negotiated as if the companies were strangers, not family.
• Coordinated Action: It shows the three major owners (Ultrapar, Braskem, Petrobras) are working together to support the jointly controlled refinery.

⚠️ Risks / Things to Watch:

• Related-Party Risk: The biggest flag. Because Ultrapar is dealing with its partners (Braskem, Petrobras) in a jointly owned company, there's always a question: Are the terms truly the best for minority shareholders, or are they favoring the controlling group? The filing explicitly justifies the fairness to address this concern.
• Future Dilution: The mandatory conversion in 2026 means that on that date, the refinery's share count will increase. This could dilute the ownership percentage of existing shareholders who don't participate.
• Exposure to Oil & Refining: This deepens Ultrapar's financial exposure to the volatile oil refining sector through its stake in RPR.

📊 Financial Position & Impact

For Ultrapar, this transaction primarily affects its investments in associates rather than its direct debt. They are spending cash now to buy these debentures, which will later convert into an equity stake.

• Cash Outflow: Ultrapar (and its partners) will pay their share of the R$450M for Series 1 debentures by March 25, 2026.
• Balance Sheet Change: After conversion in 2026, the amount Ultrapar paid will move from a "loan receivable" or "investment" line item to "Investment in RPR" on its balance sheet.

🔮 What's Next: The Conversion Clock

The most important date here is December 31, 2026.

• Mandatory Conversion: By this date, RPR must complete all corporate acts to convert all debentures into common (Series 1) and preferred (Series 2) shares of the refinery.
• End of Interest Payments: After conversion, RPR will no longer pay the CDI + 5.5% interest. The debenture holders become shareholders.
• Ownership Lock: The debenture holders are contractually bound to follow share transfer rules, ensuring the ownership structure remains stable until conversion.

🧠 The Analogy

Imagine three roommates (Ultrapar, Braskem, Petrobras) who co-own a car (the RPR refinery). The car needs a major engine repair costing about $90. Instead of each paying cash upfront, they take out a high-interest loan together in the car's name. The deal is that in exactly one year, that loan will automatically convert into a slightly larger share of ownership of the car for each of them. This filing is the roommate (Ultrapar) showing the utility bill (the public) that they got a loan and explaining the fair interest rate they negotiated.

📇 Key Contacts & People

• Alexandre Mendes Palhares
  • Title: Chief Financial and Investor Relations Officer
  • Signatory for: Ultrapar Participações S.A. and Ultrapar Holdings Inc.
  • Contact: (Listed as the officer to contact for the transaction details within the filing).

🧩 Final Takeaway

Ultrapar is investing alongside its major partners (Petrobras, Braskem) to provide a R$451 million cash infusion to their jointly owned oil refinery via a loan that will automatically become an equity stake in late 2026. The key for investors is to monitor the refinery's performance, as this deal deepens Ultrapar's financial ties to the energy sector.