SCHEDULE: Southeastern Asset Management Boosts Clearwater Paper Stake to 8.6%

Southeastern Asset Management, along with Longleaf Partners Small-Cap Fund, reported a combined 8.6% beneficial ownership in Clearwater Paper Corporation as of December 31, 2025.

Summary

• Southeastern Asset Management, Inc. and Longleaf Partners Small-Cap Fund, along with O. Mason Hawkins, filed an Amendment No. 1 to Schedule 13G for Clearwater Paper Corporation.
• As of December 31, 2025, Southeastern Asset Management, Inc. beneficially owned 1,380,930 shares, representing 8.6% of Clearwater Paper Corporation's common stock.
• Longleaf Partners Small-Cap Fund beneficially owned 1,378,835 shares, also representing 8.6% of the class.
• O. Mason Hawkins reported 0 beneficial ownership.
• The reporting persons certified that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer, except for activities solely in connection with a nomination under Rule 14a-11.

Sentiment

Score: 7

Explanation: StockSavvy.ai views this as moderately positive. A significant, passive stake by a reputable investment firm like Southeastern Asset Management can be seen as a vote of confidence in Clearwater Paper's value proposition, potentially attracting other investors.

Positives

• A significant institutional investor, Southeastern Asset Management, maintains a substantial 8.6% stake in Clearwater Paper, indicating continued confidence in the company's long-term prospects.
• The filing confirms the investment is for ordinary course of business, suggesting a passive, long-term investment strategy rather than an immediate activist play, which can provide stability.

Risks

• While the filing states the investment is passive, a large institutional stake could potentially lead to future pressure on management or strategic direction if performance does not meet expectations, even if not explicitly stated as an activist intent.

Future Outlook

NA

Industry Context

StockSavvy.ai notes that a significant stake by a value-oriented investment firm like Southeastern Asset Management in a company within the paper and pulp industry, such as Clearwater Paper, often signals a belief in the underlying asset value or potential for operational improvements. This industry has faced various challenges, including fluctuating raw material costs and evolving consumer preferences, making strategic positioning and efficient operations critical.

Stakeholder Impact

• Shareholders: The disclosure of a significant institutional stake by Southeastern Asset Management could be viewed positively, potentially signaling confidence in the company's valuation and future performance. It might also suggest a degree of oversight from a large investor.
• Management: Management will be aware of a substantial shareholder, which could influence strategic decisions and communication, though the filing indicates a passive investment intent.

Key Dates

Recommendation

The filing indicates a significant, passive institutional investment, which is generally a positive signal. However, it does not provide new operational or financial performance data to warrant a "buy" or "sell" recommendation. The information suggests a stable, long-term interest from a major investor, supporting a "hold" position for existing shareholders and a cautious approach for new investors awaiting further operational updates.

Keywords

Clearwater Paper Corporation, Southeastern Asset Management, Longleaf Partners Small-Cap Fund, Schedule 13G, Beneficial Ownership, Common Stock, Paper Industry, Institutional Investment, Shareholder Stake