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NAMS · NewAmsterdam Pharma Co N.V.

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$27.37 +0.03 (+0.11%)
Market Cap
$3.27B
Shares
119.54M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 200
Total Value: $4,243,983,926
Total Shares: 125,739,574

Institutional Ownership Trend

16 quarters

Holder Concentration

Across 200 13F filers · Δ vs Mar 31, 2026
Top Holder
14.7%
Sep 2023 → Jun 2026 · range 13.7% – 24.1%
+0.9 pts
Top 5
47.3%
Sep 2023 → Jun 2026 · range 44.4% – 84.0%
+2.5 pts
Top 10
62.3%
Sep 2023 → Jun 2026 · range 62.3% – 95.5%
−1.7 pts
HHI
565
Sep 2023 → Jun 2026 · range 550 – 1,637
Broadly held+15

Quarterly Activity

vs Mar 31, 2026
New
47
Increased
74
Decreased
50
Sold Out
23
Unchanged
29
Holder count: +24
Institutional value: +5.8%
Shares held: -0.1%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 221
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1936258 CUSIP N62509109 13F (30d) 178 filings 176 filers Visit website Investor relations