SCHEDULE: Warburg Pincus Group Discloses 36.3% Stake in Sotera Health

A group of Warburg Pincus entities, in conjunction with GTCR Investors, reported beneficial ownership of 36.3% of Sotera Health Co.'s common stock.

Summary

• Warburg Pincus Reporting Persons, along with GTCR Investors, collectively beneficially own 103,038,253 shares of Sotera Health Co. common stock.
• This represents approximately 36.3% of the total 284,046,606 shares outstanding as of July 29, 2025.
• The beneficial ownership is primarily due to a Stockholders Agreement dated November 19, 2020, which includes voting arrangements for director elections.
• Warburg Pincus Reporting Persons directly own 61,822,952 shares, while GTCR Investors own 41,215,301 shares, as reported in their separate Form 4 filing.
• Warburg Pincus Reporting Persons expressly disclaim beneficial ownership of shares held by GTCR Investors, except as mandated by the Stockholders Agreement.

Sentiment

Score: 5

Explanation: This is a factual disclosure of beneficial ownership and governance arrangements, providing neutral information without explicit positive or negative financial performance indicators.

Positives

• Significant institutional investor commitment: Warburg Pincus and GTCR collectively hold a substantial 36.3% stake, indicating strong conviction in Sotera Health Co.
• Stability in governance: The Stockholders Agreement outlines voting arrangements for director elections, which can provide a stable governance framework.

Negatives

• Concentrated ownership: A large portion of the company's voting power is concentrated among a few institutional investors, potentially limiting influence for smaller shareholders.

Risks

• Potential for divergent interests: While the Stockholders Agreement outlines voting, there is always a risk that the interests of the large institutional group may not perfectly align with those of other shareholders.
• Limited public float: A significant portion of shares held by a concentrated group could impact liquidity and trading volume for other investors.

Future Outlook

NA

Industry Context

This filing reflects the ongoing involvement of major private equity firms, Warburg Pincus and GTCR, in Sotera Health Co., a common characteristic for companies that have undergone private equity ownership or significant institutional investment. Such substantial stakes often indicate a long-term investment horizon and potential for strategic influence by these firms.

Comparison to Industry Standards

• The combined 36.3% ownership by Warburg Pincus and GTCR is a substantial stake, typical of private equity firms maintaining significant influence post-IPO or in strategic investments. For example, similar large institutional holdings are seen in companies like IQVIA Holdings Inc. (formerly Quintiles IMS Holdings, Inc.) where private equity firms TPG and KKR held significant stakes after their initial investments, or in healthcare services companies like Encompass Health Corporation, which also saw substantial institutional ownership post-spin-off. This level of ownership suggests a continued strategic partnership rather than a passive investment.

Corporate Governance

Stakeholder Impact

• Shareholders: The significant combined ownership by Warburg Pincus and GTCR (36.3%) implies a stable shareholder base but also concentrated voting power, which could influence strategic decisions and potentially limit the impact of smaller shareholders.
• Management: The Stockholders Agreement's provisions on director elections suggest that management will operate under the influence and oversight of these major institutional investors.

Key Dates

Recommendation

This filing is a routine update on beneficial ownership by a major institutional investor group, Warburg Pincus, in conjunction with GTCR. It reaffirms their significant, long-standing stake of 36.3% in Sotera Health Co. and the existing Stockholders Agreement governing their voting rights. There are no new financial disclosures, strategic shifts, or material changes in ownership that would warrant a change in investment thesis. The concentrated ownership provides a degree of stability but also means less influence for smaller shareholders. Given the lack of new material information impacting valuation or operational performance, a "hold" recommendation is appropriate, maintaining current positions while awaiting further operational or financial updates.

Keywords

Sotera Health Co, Warburg Pincus, GTCR, beneficial ownership, Schedule 13G, common stock, institutional investment, corporate governance, stockholders agreement, equity stake