SCHEDULE: RTW Investments Discloses 2.7% Stake in Merus N.V.

RTW Investments, LP and Roderick Wong have reported a 2.7% beneficial ownership stake in Merus N.V. common shares as of September 30, 2025.

Summary

• RTW Investments, LP and Roderick Wong collectively beneficially own 2,025,277 common shares of Merus N.V.
• This ownership represents 2.7% of Merus N.V.'s total outstanding common shares.
• The reporting persons hold these shares with shared voting power and shared dispositive power.
• The event requiring this Schedule 13G filing occurred on September 30, 2025.
• The securities were acquired and are held in the ordinary course of business, not for the purpose of changing or influencing control of Merus N.V.

Sentiment

Score: 6

Explanation: The filing is a routine disclosure of a passive beneficial ownership stake by an investment firm. While it doesn't contain operational news, the presence of a notable institutional investor holding a 2.7% stake can be viewed as a minor positive signal of confidence.

Positives

• A significant investment firm, RTW Investments, LP, holds a substantial stake in Merus N.V., potentially signaling confidence in the company's long-term prospects.

Negatives

• No specific negatives related to Merus N.V.'s operations or financial health are disclosed in this ownership filing.

Risks

• The filing explicitly states that it should not be construed as an admission that any reporting person is a beneficial owner for the purposes of Section 13 of the Securities Exchange Act of 1934.

Future Outlook

This filing, a Schedule 13G, pertains solely to beneficial ownership disclosure and does not provide any forward-looking statements or guidance regarding Merus N.V.'s future outlook or operations.

Management Comments

• Roderick Wong, M.D., Managing Partner of RTW Investments, 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 Merus N.V.

Industry Context

This Schedule 13G filing is a routine disclosure of passive beneficial ownership and does not offer insights into broader industry trends or competitive landscape for Merus N.V.

Comparison to Industry Standards

• This filing is a standard beneficial ownership disclosure and does not contain information suitable for comparison to industry-specific operational or financial benchmarks.

Stakeholder Impact

• Shareholders: Provides transparency regarding significant institutional ownership in Merus N.V.

Next Steps

• No specific future actions or milestones for Merus N.V. are mentioned in this beneficial ownership filing.

Key Dates

Keywords

Merus N.V., RTW Investments, Roderick Wong, beneficial ownership, Schedule 13G, common shares, investment adviser