Simplex Trading
RMBS icon

Simplex Trading’s Rambus RMBS Stock Holding History

Simplex Trading’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 		$688K Sell
8,000
-24,200
-75% -$2.41M ﹤0.01% 2909
2025
Q4 		$2.96M Sell
32,200
-10,800
-25% -$1.06M ﹤0.01% 1668
2025
Q3 		$4.48M Buy
43,000
+19,500
+83% +$1.5M ﹤0.01% 1572
2025
Q2 		$1.5M Buy
23,500
+700
+3% +$37.5K ﹤0.01% 2372
2025
Q1 		$1.18M Sell
22,800
-18,200
-44% -$1.07M ﹤0.01% 2540
2024
Q4 		$2.17M Sell
41,000
-22,900
-36% -$1.17M ﹤0.01% 2122
2024
Q3 		$2.7M Buy
63,900
+8,800
+16% +$427K ﹤0.01% 2015
2024
Q2 		$3.24M Sell
55,100
-35,500
-39% -$2.03M ﹤0.01% 1766
2024
Q1 		$5.6M Buy
90,600
+500
+0.6% +$31.6K ﹤0.01% 1522
2023
Q4 		$6.15M Sell
90,100
-53,800
-37% -$3.35M ﹤0.01% 1401
2023
Q3 		$8.03M Sell
143,900
-14,000
-9% -$794K 0.01% 1036
2023
Q2 		$10.1M Buy
157,900
+53,900
+52% +$2.97M 0.01% 883
2023
Q1 		$5.33M Buy
104,000
+90,100
+648% +$3.87M ﹤0.01% 1259
2022
Q4 		$497K Sell
13,900
-22,900
-62% -$774K ﹤0.01% 3162
2022
Q3 		$935K Buy
36,800
+10,000
+37% +$250K ﹤0.01% 2724
2022
Q2 		$575K Buy
26,800
+10,800
+68% +$267K ﹤0.01% 3272
2022
Q1 		$510K Sell
16,000
-7,200
-31% -$199K ﹤0.01% 3814
2021
Q4 		$681K Sell
23,200
-27,500
-54% -$699K ﹤0.01% 3400
2021
Q3 		$1.19M Buy
50,700
+2,600
+5% +$61.2K ﹤0.01% 2826
2021
Q2 		$1.14M Buy
48,100
+47,244
+5,519% +$951K ﹤0.01% 2916
2021
Q1 		$1.66M Sell
856
-351
-29% -$7.05K ﹤0.01% 1832
2020
Q4 		$2.11M Buy
1,207
+522
+76% +$8.19K ﹤0.01% 1729
2020
Q3 		$937K Sell
685
-440
-39% -$6.25K ﹤0.01% 2297
2020
Q2 		$1.71M Buy
1,125
+650
+137% +$9.15K ﹤0.01% 1636
2020
Q1 		$527K Buy
475
+148
+45% +$2.05K ﹤0.01% 2527
2019
Q4 		$450K Sell
327
-104
-24% -$1.4K ﹤0.01% 2852
2019
Q3 		$565K Sell
431
-267
-38% -$3.35K ﹤0.01% 2496
2019
Q2 		$840K Sell
698
-710
-50% -$8.13K ﹤0.01% 2063
2019
Q1 		$1.47M Buy
1,408
+1,402
+23,367% +$13.5K ﹤0.01% 1642
2018
Q4 		$4K Sell
6
-774
-99% -$6.73K ﹤0.01% 6334
2018
Q3 		$850K Buy
780
+643
+469% +$7.82K ﹤0.01% 2055
2018
Q2 		$171K Sell
137
-899
-87% -$12.2K ﹤0.01% 3672
2018
Q1 		$39K Buy
1,036
+637
+160% +$8.53K ﹤0.01% 2692
2017
Q4 		$5K Sell
399
-1,105
-73% -$15.9K ﹤0.01% 4546
2017
Q3 		$86K Buy
1,504
+823
+121% +$10.6K ﹤0.01% 1852
2017
Q2 		$12K Buy
681
+206
+43% +$2.53K ﹤0.01% 3830
2017
Q1 		$20K Buy
475
+235
+98% +$3.09K ﹤0.01% 3266
2016
Q4 		$24K Sell
240
-189
-44% -$2.45K ﹤0.01% 2865
2016
Q3 		$18K Buy
429
+71
+20% +$938 ﹤0.01% 3082
2016
Q2 		$14K Buy
358
+86
+32% +$1.05K ﹤0.01% 3256
2016
Q1 		$45K Sell
272
-8
-3% -$99 ﹤0.01% 2041
2015
Q4 		$30K Buy
280
+121
+76% +$1.4K ﹤0.01% 2342
2015
Q3 		$32K Sell
159
-9
-5% -$117 ﹤0.01% 2342
2015
Q2 		$64K Buy
168
+156
+1,300% +$2.23K 0.01% 1515
2015
Q1 		$3K Sell
12
-145
-92% -$1.71K ﹤0.01% 3894
2014
Q4 		$6K Buy
+157
New +$1.78K ﹤0.01% 2975

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

Simplex Trading's RMBS Position: Q1 2026 in Review

Simplex Trading sold out of Rambus (RMBS) in Q1 2026, closing a stake of 3,884 shares — an estimated $388K sold.

Simplex Trading first reported a position in RMBS in Q4 2014 and held it in 23 quarters. The position peaked at $1.74M in Q3 2023. 553 funds tracked by Wall St. Rank hold RMBS as of Q1 2026.

  • Simplex Trading reported no remaining Rambus position as of Q1 2026 after selling out during the quarter.
  • Simplex Trading sold 3,884 Rambus shares in Q1 2026, an estimated $388K.
  • Simplex Trading first reported a position in Rambus in Q4 2014 and held it in 23 quarters.
  • Simplex Trading's Rambus position peaked at $1.74M in Q3 2023.
  • 553 funds tracked by Wall St. Rank held Rambus as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.