Wellington Management Group’s NewAmsterdam Pharma NAMS Stock Holding History

Wellington Management Group’s Portfolio NAMS Stock Details NAMS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$164M	Buy	5,115,818 +82,643	+2%	+$2.69M	0.03%	428
2025 Q4	$177M	Buy	5,033,175 +1,013,049	+25%	+$36.9M	0.03%	415
2025 Q3	$114M	Buy	4,020,126 +697,129	+21%	+$16.7M	0.02%	529
2025 Q2	$60.2M	Sell	3,322,997 -218,978	-6%	-$3.99M	0.01%	639
2025 Q1	$72.5M	Buy	3,541,975 +1,226,852	+53%	+$27.3M	0.01%	586
2024 Q4	$59.5M	Buy	2,315,123 +2,222,900	+2,410%	+$47.2M	0.01%	661
2024 Q3	$1.53M	Buy	92,223 +9,162	+11%	+$159K	﹤0.01%	1621
2024 Q2	$1.6M	Sell	83,061 -135,021	-62%	-$2.71M	﹤0.01%	1568
2024 Q1	$5.16M	Buy	+218,082	New	+$4.43M	﹤0.01%	1313

Other funds holding NAMS

FLSM

Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

RCM

RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return

FIS

FCPM III Services Naarden, Netherlands $722M AUM 73.61% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

BCLSI

Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return

Deerfield Management New York $8.48B AUM 99.04% 1-Year Est. Return

Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return

DFO

Duquesne Family Office New York $3.38B AUM 61.92% 1-Year Est. Return

PCH

Polar Capital Holdings London, United Kingdom $28.2B AUM 115.26% 1-Year Est. Return

Wellington Management Group's NAMS Position: Q1 2026 in Review

Wellington Management Group increased its NewAmsterdam Pharma (NAMS) stake by 1.6% in Q1 2026, buying an estimated $2.69M and bringing the position to 5,115,818 shares worth $164M. The position accounts for 0.03% of the portfolio, ranked #428.

Wellington Management Group first reported a position in NAMS in Q1 2024 and has held it in 9 quarters since. The position peaked at $177M in Q4 2025. 170 funds tracked by Wall St. Rank hold NAMS as of Q1 2026.

Wellington Management Group held 5,115,818 shares of NewAmsterdam Pharma worth $164M as of Q1 2026.
Wellington Management Group bought 82,643 NewAmsterdam Pharma shares in Q1 2026, an estimated $2.69M.
NewAmsterdam Pharma made up 0.03% of Wellington Management Group's portfolio in Q1 2026, its #428 holding.
Wellington Management Group first reported a position in NewAmsterdam Pharma in Q1 2024 and has held it in 9 quarters since.
Wellington Management Group's NewAmsterdam Pharma position peaked at $177M in Q4 2025.
170 funds tracked by Wall St. Rank held NewAmsterdam Pharma as of Q1 2026.

Based on Wellington Management Group's 13F filing for Q1 2026, filed 15 May 2026.