Jane Street
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Jane Street’s Rambus RMBS Stock Holding History

Jane Street’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
Q1 		$4.57M Buy
53,100
+9,600
+22% +$958K ﹤0.01% 3651
2025
Q4 		$4M Sell
43,500
-35,000
-45% -$3.44M ﹤0.01% 3588
2025
Q3 		$8.18M Buy
78,500
+15,500
+25% +$1.19M ﹤0.01% 2681
2025
Q2 		$4.03M Sell
63,000
-25,200
-29% -$1.35M ﹤0.01% 3317
2025
Q1 		$4.57M Buy
88,200
+3,700
+4% +$217K ﹤0.01% 3067
2024
Q4 		$4.47M Buy
84,500
+55,900
+195% +$2.85M ﹤0.01% 2821
2024
Q3 		$1.21M Buy
28,600
+24,800
+653% +$1.2M ﹤0.01% 5506
2024
Q2 		$223K Sell
3,800
-1,500
-28% -$85.7K ﹤0.01% 8225
2024
Q1 		$328K Sell
5,300
-5,600
-51% -$354K ﹤0.01% 7418
2023
Q4 		$744K Sell
10,900
-2,100
-16% -$131K ﹤0.01% 6105
2023
Q3 		$725K Sell
13,000
-10,500
-45% -$596K ﹤0.01% 5661
2023
Q2 		$1.51M Buy
23,500
+7,000
+42% +$385K ﹤0.01% 4592
2023
Q1 		$846K Buy
16,500
+10,500
+175% +$451K ﹤0.01% 5332
2022
Q4 		$215K Sell
6,000
-9,500
-61% -$321K ﹤0.01% 7558
2022
Q3 		$394K Buy
+15,500
New +$388K ﹤0.01% 7130
2022
Q2 		– Sell
-58,800
Closed -$1.88M – 10687
2022
Q1 		$1.88M Buy
58,800
+37,400
+175% +$1.04M ﹤0.01% 4875
2021
Q4 		$629K Buy
21,400
+5,300
+33% +$135K ﹤0.01% 6825
2021
Q3 		$357K Sell
16,100
-300
-2% -$7.06K ﹤0.01% 7861
2021
Q2 		$389K Sell
16,400
-8,100
-33% -$163K ﹤0.01% 7713
2021
Q1 		$476K Buy
+24,500
New +$492K ﹤0.01% 6887

Other funds holding RMBS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
EIG
EdgePoint Investment Group Toronto, Ontario, Canada $12.5B AUM 31.7% 1-Year Est. Return

Jane Street's RMBS Position: Q1 2026 in Review

Jane Street reduced its Rambus (RMBS) stake by 0.53% in Q1 2026, selling an estimated $2.89K and leaving 5,426 shares worth $467K. The position accounts for ﹤0.01% of the portfolio, ranked #8228.

Jane Street first reported a position in RMBS in Q2 2013 and has held it in 30 quarters since. The position peaked at $20.1M in Q3 2025. 554 funds tracked by Wall St. Rank hold RMBS as of Q1 2026.

  • Jane Street held 5,426 shares of Rambus worth $467K as of Q1 2026.
  • Jane Street sold 29 Rambus shares in Q1 2026, an estimated $2.89K.
  • Rambus made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #8228 holding.
  • Jane Street first reported a position in Rambus in Q2 2013 and has held it in 30 quarters since.
  • Jane Street's Rambus position peaked at $20.1M in Q3 2025.
  • 554 funds tracked by Wall St. Rank held Rambus as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.