MERUS N V (2GH) Institutional Ownership & Top Holders
The most recent SEC Form 13F filings (Q3 2025) show 17 hedge funds and institutional investors holding a combined 23.4M shares of MERUS N V (2GH), valued at $2.2B. The median portfolio weight is 4.3%.
Institutional ownership changes in 2GH reflect net buying, as the combined position increased by 961K shares (4.3%) from the previous quarter.
Among 13F filers, the funds with the highest portfolio allocation to 2GH are Lynx1 Capital Management (29.4% of its 13F portfolio), Commodore Capital (16.2%), and Paradigm Biocapital Advisors (12.2%). In Q3 2025, Kryger made the largest position increase (+11.5%), while Caligan made the largest reduction (-3.9%).
Top 10 Institutional Holders in MERUS N V (2GH), Ranked by Portfolio Weight
Based on the latest SEC Form 13F filings (Q3 2025).
| # | Fund | Shares | Market Value | Portfolio Weight |
|---|---|---|---|---|
| 1 | Lynx1 Capital Management | 1,534,141 | $144.4M | 29.4% |
| 2 | Commodore Capital | 3,525,000 | $331.9M | 16.2% |
| 3 | Paradigm Biocapital Advisors | 4,373,770 | $411.8M | 12.2% |
| 4 | Kryger | 1,053,500 | $99.2M | 11.5% |
| 5 | Sand Grove Capital Management | 239,378 | $22.5M | 11.0% |
| 6 | Glazer Capital | 1,619,372 | $152.5M | 5.1% |
| 7 | Octagon Capital Advisors | 308,000 | $29.0M | 4.5% |
| 8 | Deerfield | 3,046,916 | $286.9M | 4.4% |
| 9 | Avoro Capital Advisors | 3,542,500 | $333.5M | 4.3% |
| 10 | Decagon Asset Management | 83,728 | $7.9M | 4.2% |
- 17Institutional investors
- 23,398,508Shares held (disclosed)
- $2.2B13F market value
- 4.3%Median portfolio weight
Ownership History
Quarter-by-quarter share count, market value, and portfolio conviction weight (up to 5 of the heaviest weight-by-portfolio funds) of 2GH. Sourced from 13F filings; reflects long equity positions only.
Quarter-over-Quarter ActivityQ3 2025
The biggest weight-increase and weight-decrease changes among funds that hold 2GH. Deltas compare the selected filing to the previous reporting quarter.
Top buyers
- Kryger+11.5% · +1,053,500 shares
- Sand Grove Capital Management+11.0% · +239,378 shares
- Glazer Capital+5.1% · +1,619,372 shares
Top sellers
- Caligan-3.9% · -440,045 shares
- Saturn V Capital Management-1.0% · -40,125 shares
- Darwin Global Management-0.9% · -395,738 shares
Ownership Statistics
- Funds holding
- 17
- Median weight
- 4.3%
- Largest holder
- Lynx1 Capital Management · 29.4%
- Smallest holder
- Polen Capital Management · 0.0%
- Shares held
- 23,398,508 (+960,769)
All Institutional HoldersSortable · searchable
All institutional investors (Max 50) holding 2GH in the selected quarter. Click a fund name to drill into its full 13F portfolio.
| 1 | Lynx1 Capital Management | 1,534,141 | $144.4M | 29.4% |
| 2 | Commodore Capital | 3,525,000 | $331.9M | 16.2% |
| 3 | Paradigm Biocapital Advisors | 4,373,770 | $411.8M | 12.2% |
| 4 | Kryger | 1,053,500 | $99.2M | 11.5% |
| 5 | Sand Grove Capital Management | 239,378 | $22.5M | 11.0% |
| 6 | Glazer Capital | 1,619,372 | $152.5M | 5.1% |
| 7 | Octagon Capital Advisors | 308,000 | $29.0M | 4.5% |
| 8 | Deerfield | 3,046,916 | $286.9M | 4.4% |
| 9 | Avoro Capital Advisors | 3,542,500 | $333.5M | 4.3% |
| 10 | Decagon Asset Management | 83,728 | $7.9M | 4.2% |
| 11 | Saturn V Capital Management | 184,135 | $17.3M | 3.8% |
| 12 | Slotnik Capital | 90,000 | $8.5M | 3.1% |
| 13 | Caligan | 216,954 | $20.4M | 2.8% |
| 14 | RTW Investments | 2,025,277 | $190.7M | 2.3% |
| 15 | Pentwater Capital Management | 970,000 | $91.3M | 0.8% |
| 16 | Baker Bros. Advisors | 574,377 | $54.1M | 0.4% |
| 17 | Polen Capital Management | 11,460 | $1.1M | 0.0% |
Institutional Investor Count Over Time
Number of institutional investors disclosing a long position in MERUS N V (2GH) each reporting quarter. Sourced from SEC Form 13F-HR filings.
Methodology & FAQ
Methodology: How We Track 2GH Institutional Holdings
Our data is systematically aggregated directly from quarterly Form 13F-HR disclosures submitted to the U.S. Securities and Exchange Commission (SEC).
- Who Must File (Reporting Threshold): This dataset includes filings from U.S. institutional investment managers, hedge funds, mutual funds, university endowments, and family offices managing at least $100 million in Section 13(f) securities (including equities, options, convertibles, ETFs, and warrants).
- What is Included (Data Scope): We capture long positions in Section 13(f) securities for MERUS N V (2GH). By SEC regulation, 13F filings do not require the disclosure of short positions, non-U.S. holdings, or OTC derivatives. Listed options are excluded from portfolio weight calculations to ensure comparability across filers.
- Portfolio Weight Explained (Metric Definition): “Portfolio Weight” shows how much of a fund's total reported 13F portfolio value (excluding listed options) is allocated to 2GH on the specific reporting date.
- How to Use This Data (Interpretation): Quarter-over-quarter changes in shares and portfolio weight reflect a combination of active trading and market price movements. These are descriptive metrics of fund allocation, not explicit buy or sell signals.
How do you measure hedge fund conviction and institutional concentration in 2GH?
We evaluate fund conviction by looking at portfolio weight rather than just absolute share count. By tracking how the largest holders —such as Lynx1 Capital Management , Commodore Capital , and Paradigm Biocapital Advisors as of Q3 2025— change their position sizing quarter-over-quarter, we help investors distinguish between deliberate position sizing changes and passive mark-to-market drift.
Does the 2GH ownership data include short interest or options?
SEC Form 13F mandates the disclosure of long positions in Section 13(f) securities, which includes equities and listed options (put and call contracts), but excludes short interest, swaps, and OTC derivatives by regulatory design. On this platform, listed options are excluded from portfolio weight calculations to ensure comparability across filers.
Are family offices and university endowments included in this 2GH data?
Yes. In addition to traditional hedge funds and large asset managers, any institutional entity exercising investment discretion over at least $100 million in Section 13(f) securities must file a Form 13F. This explicitly includes single-family offices and university endowments. If a qualifying family office or endowment holds 2GH stock, their allocation is systematically aggregated alongside traditional fund data.
When is the institutional ownership data updated, and is there a reporting lag?
Institutional investment managers are required to file their Form 13F within 45 days after the end of a calendar quarter (the standard “T+45” window). Our platform re-ingests new filings from the SEC EDGAR database on a nightly cycle, typically within 24–48 hours of publication, providing a point-in-time snapshot of reported consensus positioning for 2GH as of each filing date.