Newamsterdam Pharma Co Nv
Held by 3 superinvestors (NAMS).
Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.
Ownership · 13F consensus
Who's buying it
Institutional ownership aggregated across funds — consensus strength and this quarter's moves. Describes actions, not advice.
3 superinvestors hold it · $302.8M combined
Largest holder Andreas Halvorsen
Held by 3 superinvestors of Newamsterdam Pharma Co Nv (NAMS); this quarter 1 added, 1 exited (as of 2026-03-31).
13F positions are self-reported and can lag up to 45 days. Informational only — not investment advice.
Superinvestors Holding This Security
- Value$134.6MWeight (prev→now)0.4% → 0.4%
- Value$98.3MWeight (prev→now)2.4% → 2.9%
- Value$70.0MWeight (prev→now)0.7% → 0.8% ▲
Ownership overview
Newamsterdam Pharma Co Nv (NAMS) is held by 3 of the superinvestors tracked on Compounder, with a combined $302.8M in reported 13F value. The largest position belongs to Andreas Halvorsen, where it makes up 0.4% of the portfolio.
Other notable holders by value include Stanley Druckenmiller (2.9% of its book) and Lee Ainslie (0.8% of its book).
Over the latest quarter, 0 of the tracked filers opened a new position in NAMS, 1 added to existing ones, 0 trimmed, and 1 sold out entirely.
Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.
Holders over time
Superinvestors holding this security over the last 8 quarters: 1 → 3.
Early quarters may understate holder counts due to data backfill — read the slope with care.
Sources· SEC EDGAR 13F as of 2026-05-15
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