SCHEDULE: Adage Capital Exits Sitio Royalties Stake

Adage Capital Management, L.P. and its principals have reported a complete divestment of their Class A Common Stock in Sitio Royalties Corp., reducing their beneficial ownership to 0%.

Summary

• Adage Capital Management, L.P., Robert Atchinson, and Phillip Gross (the "Reporting Persons") have filed an Amendment No. 1 to Schedule 13G for Sitio Royalties Corp.
• The filing indicates that the Reporting Persons no longer beneficially own any shares of Sitio Royalties Corp. Class A Common Stock.
• Their aggregate beneficial ownership has been reduced to 0 shares, representing 0% of the class.
• The event requiring this filing occurred on September 30, 2025.
• The filing certifies that the securities were acquired and held in the ordinary course of business and not for the purpose of influencing control of the issuer.

Sentiment

Score: 3

Explanation: The complete divestment by a significant institutional investor is generally a negative signal for the issuer, suggesting a loss of confidence or a strategic shift away from the company. While it's a routine disclosure for the investor, it can impact market perception of the company.

Positives

• For the Reporting Persons, this represents a completed portfolio adjustment or divestment strategy.

Negatives

• A significant institutional investor, Adage Capital Management, L.P., has fully divested its stake in Sitio Royalties Corp.
• This complete exit could be interpreted negatively by the market, potentially signaling a lack of confidence or a shift in investment strategy regarding the issuer.

Risks

• The complete divestment by a major institutional investor like Adage Capital Management could lead to negative market sentiment and potential downward pressure on Sitio Royalties Corp.'s stock price.
• The future date of the event (September 30, 2025) and the filing date (November 13, 2025) are unusual and could cause confusion or raise questions about the timing and nature of the disclosure.

Future Outlook

NA

Industry Context

This filing reflects a specific portfolio decision by an investment manager and does not inherently provide broader industry trends. However, significant divestments by large funds can sometimes precede or coincide with shifts in sector-specific sentiment, particularly in the energy or royalties sector where Sitio Royalties Corp. operates.

Stakeholder Impact

• Shareholders of Sitio Royalties Corp. may react negatively to the news of a major institutional investor fully divesting its stake, potentially leading to decreased investor confidence and share price volatility.

Key Dates

Recommendation

The complete divestment by a prominent institutional investor like Adage Capital Management, L.P. signals a significant lack of confidence or a strategic exit from Sitio Royalties Corp. This action, especially when reducing ownership to 0%, often precedes or contributes to negative market sentiment and potential downward pressure on the stock price. While the filing itself doesn't provide a rationale, such a move by a sophisticated investor suggests underlying concerns or better opportunities elsewhere, making a 'sell' recommendation prudent for existing holders and advising against new positions.

Keywords

Sitio Royalties Corp., Adage Capital Management, Schedule 13G, Beneficial Ownership, Divestment, Institutional Investor, Class A Common Stock, SEC Filing, Equity Stake