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Oberweis Asset Management’s Rambus RMBS Stock Holding History

Oberweis Asset 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 		$70M Buy
527,016
+700
+0.1% +$91K 1.45% 10
2026
Q1 		$45.3M Buy
526,316
+64,216
+14% +$6.41M 1.34% 10
2025
Q4 		$42.5M Sell
462,100
-45,799
-9% -$4.51M 1.55% 6
2025
Q3 		$52.9M Buy
507,899
+2,119
+0.4% +$163K 2.03% 3
2025
Q2 		$32.4M Sell
505,780
-1,570
-0.3% -$84.1K 1.41% 11
2025
Q1 		$26.3M Buy
507,350
+97,950
+24% +$5.75M 1.31% 11
2024
Q4 		$21.6M Buy
+409,400
New +$20.9M 1.02% 20

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

Oberweis Asset Management's RMBS Position: Q2 2026 in Review

Oberweis Asset Management increased its Rambus (RMBS) stake by 0.13% in Q2 2026, buying an estimated $91K and bringing the position to 527,016 shares worth $70M. The position accounts for 1.45% of the portfolio, ranked #10.

Oberweis Asset Management first reported a position in RMBS in Q4 2024 and has held it in 7 quarters since. 618 funds tracked by Wall St. Rank hold RMBS as of Q2 2026.

  • Oberweis Asset Management held 527,016 shares of Rambus worth $70M as of Q2 2026.
  • Oberweis Asset Management bought 700 Rambus shares in Q2 2026, an estimated $91K.
  • Rambus made up 1.45% of Oberweis Asset Management's portfolio in Q2 2026, its #10 holding.
  • Oberweis Asset Management first reported a position in Rambus in Q4 2024 and has held it in 7 quarters since.
  • 618 funds tracked by Wall St. Rank held Rambus as of Q2 2026.

Based on Oberweis Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.