Westfield Capital Management
NAMS icon

Westfield Capital Management’s NewAmsterdam Pharma NAMS Stock Holding History

Westfield Capital Management’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
Q2 		$52.1M Sell
1,536,472
-666,441
-30% -$22M 0.17% 153
2026
Q1 		$70.5M Buy
+2,202,913
New +$71.8M 0.3% 114

Other funds holding NAMS

FLSM
Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
FIS
FCPM III Services Naarden, Netherlands $750M AUM 127.27% 1-Year Est. Return
DM
Deerfield Management New York $9.59B AUM 113.36% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.1B AUM 21.36% 1-Year Est. Return
BCLSI
Bain Capital Life Sciences Investors Boston, Massachusetts $1.68B AUM 126.09% 1-Year Est. Return
MC
Maverick Capital Dallas, Texas $11.3B AUM 76.6% 1-Year Est. Return
DFO
Duquesne Family Office New York $5.21B AUM 87.01% 1-Year Est. Return

Westfield Capital Management's NAMS Position: Q2 2026 in Review

Westfield Capital Management reduced its NewAmsterdam Pharma (NAMS) stake by 30% in Q2 2026, selling an estimated $22M and leaving 1,536,472 shares worth $52.1M. The position accounts for 0.17% of the portfolio, ranked #153.

Westfield Capital Management first reported a position in NAMS in Q1 2026 and has held it in 2 quarters since. The position peaked at $70.5M in Q1 2026. 194 funds tracked by Wall St. Rank hold NAMS as of Q2 2026.

  • Westfield Capital Management held 1,536,472 shares of NewAmsterdam Pharma worth $52.1M as of Q2 2026.
  • Westfield Capital Management sold 666,441 NewAmsterdam Pharma shares in Q2 2026, an estimated $22M.
  • NewAmsterdam Pharma made up 0.17% of Westfield Capital Management's portfolio in Q2 2026, its #153 holding.
  • Westfield Capital Management first reported a position in NewAmsterdam Pharma in Q1 2026 and has held it in 2 quarters since.
  • Westfield Capital Management's NewAmsterdam Pharma position peaked at $70.5M in Q1 2026.
  • 194 funds tracked by Wall St. Rank held NewAmsterdam Pharma as of Q2 2026.

Based on Westfield Capital Management's 13F filing for Q2 2026, filed 12 Aug 2026.