Westfield Capital Management
RMBS icon

Westfield Capital Management’s Rambus RMBS Stock Holding History

Westfield Capital Management’s Portfolio RMBS Stock Details RMBS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$51.2M Buy
385,811
+371,375
+2,573% +$48.3M 0.17% 157
2026
Q1 		$1.24M Sell
14,436
-347,656
-96% -$34.7M 0.01% 223
2025
Q4 		$33.3M Sell
362,092
-122,373
-25% -$12M 0.14% 169
2025
Q3 		$50.5M Sell
484,465
-477,954
-50% -$36.8M 0.21% 149
2025
Q2 		$61.6M Sell
962,419
-126,662
-12% -$6.79M 0.26% 118
2025
Q1 		$56.4M Sell
1,089,081
-300,457
-22% -$17.6M 0.27% 113
2024
Q4 		$73.5M Buy
1,389,538
+487,302
+54% +$24.8M 0.32% 93
2024
Q3 		$38.1M Buy
902,236
+356,496
+65% +$17.3M 0.17% 157
2024
Q2 		$32.1M Buy
545,740
+217,687
+66% +$12.4M 0.16% 168
2024
Q1 		$20.3M Buy
+328,053
New +$20.8M 0.11% 183

Other funds holding RMBS

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

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

Westfield Capital Management increased its Rambus (RMBS) stake by 2,573% in Q2 2026, buying an estimated $48.3M and bringing the position to 385,811 shares worth $51.2M. The position accounts for 0.17% of the portfolio, ranked #157.

Westfield Capital Management first reported a position in RMBS in Q1 2024 and has held it in 10 quarters since. The position peaked at $73.5M in Q4 2024. 614 funds tracked by Wall St. Rank hold RMBS as of Q2 2026.

  • Westfield Capital Management held 385,811 shares of Rambus worth $51.2M as of Q2 2026.
  • Westfield Capital Management bought 371,375 Rambus shares in Q2 2026, an estimated $48.3M.
  • Rambus made up 0.17% of Westfield Capital Management's portfolio in Q2 2026, its #157 holding.
  • Westfield Capital Management first reported a position in Rambus in Q1 2024 and has held it in 10 quarters since.
  • Westfield Capital Management's Rambus position peaked at $73.5M in Q4 2024.
  • 614 funds tracked by Wall St. Rank held Rambus as of Q2 2026.

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