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Fox Run Management’s Rambus RMBS Stock Holding History

Fox Run 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 		$917K Buy
6,907
+4,081
+144% +$531K 0.15% 219
2026
Q1 		$225K Sell
2,826
-4,477
-61% -$447K 0.04% 722
2025
Q4 		$671K Buy
+7,303
New +$719K 0.1% 378
2025
Q3 		– Sell
-16,033
Closed -$1.03M – 1191
2025
Q2 		$1.03M Buy
+16,033
New +$859K 0.17% 177
2025
Q1 		– Sell
-14,392
Closed -$761K – 1176
2024
Q4 		$761K Sell
14,392
-10,100
-41% -$515K 0.14% 272
2024
Q3 		$1.03M Buy
+24,492
New +$1.19M 0.23% 112
2024
Q2 		– Sell
-11,476
Closed -$709K – 1026
2024
Q1 		$709K Buy
11,476
+3,329
+41% +$211K 0.15% 252
2023
Q4 		$556K Buy
+8,147
New +$508K 0.14% 258
2023
Q2 		– Sell
-12,546
Closed -$643K – 919
2023
Q1 		$643K Buy
+12,546
New +$539K 0.21% 156
2017
Q4 		– Sell
-28,100
Closed -$375K – 853
2017
Q3 		$375K Buy
+28,100
New +$361K 0.11% 407
2017
Q2 		– Sell
-28,800
Closed -$378K – 791
2017
Q1 		$378K Buy
+28,800
New +$379K 0.15% 284
2016
Q4 		– Sell
-32,600
Closed -$408K – 643
2016
Q3 		$408K Buy
+32,600
New +$431K 0.24% 158

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

Fox Run Management's RMBS Position: Q2 2026 in Review

Fox Run Management increased its Rambus (RMBS) stake by 144% in Q2 2026, buying an estimated $531K and bringing the position to 6,907 shares worth $917K. The position accounts for 0.15% of the portfolio, ranked #219.

Fox Run Management first reported a position in RMBS in Q3 2016 and has held it in 12 quarters since. The position peaked at $1.03M in Q3 2024. 617 funds tracked by Wall St. Rank hold RMBS as of Q2 2026.

  • Fox Run Management held 6,907 shares of Rambus worth $917K as of Q2 2026.
  • Fox Run Management bought 4,081 Rambus shares in Q2 2026, an estimated $531K.
  • Rambus made up 0.15% of Fox Run Management's portfolio in Q2 2026, its #219 holding.
  • Fox Run Management first reported a position in Rambus in Q3 2016 and has held it in 12 quarters since.
  • Fox Run Management's Rambus position peaked at $1.03M in Q3 2024.
  • 617 funds tracked by Wall St. Rank held Rambus as of Q2 2026.

Based on Fox Run Management's 13F filing for Q2 2026, filed 4 Aug 2026.