Primecap Management’s Rambus RMBS Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q2 | $6.31M | Hold |
47,500
| – | – | ﹤0.01% | 280 |
|
|
2026
Q1 | $4.09M | Hold |
47,500
| – | – | ﹤0.01% | 284 |
|
|
2025
Q4 | $4.36M | Sell |
47,500
-11,500
| -19% | -$1.13M | ﹤0.01% | 280 |
|
|
2025
Q3 | $6.15M | Sell |
59,000
-3,300
| -5% | -$254K | ﹤0.01% | 275 |
|
|
2025
Q2 | $3.99M | Sell |
62,300
-10,600
| -15% | -$568K | ﹤0.01% | 292 |
|
|
2025
Q1 | $3.77M | Sell |
72,900
-9,600
| -12% | -$564K | ﹤0.01% | 288 |
|
|
2024
Q4 | $4.36M | Sell |
82,500
-12,000
| -13% | -$612K | ﹤0.01% | 282 |
|
|
2024
Q3 | $3.99M | Sell |
94,500
-9,100
| -9% | -$441K | ﹤0.01% | 289 |
|
|
2024
Q2 | $6.09M | Sell |
103,600
-24,600
| -19% | -$1.41M | ﹤0.01% | 273 |
|
|
2024
Q1 | $7.92M | Sell |
128,200
-6,763
| -5% | -$428K | 0.01% | 270 |
|
|
2023
Q4 | $9.21M | Sell |
134,963
-31,200
| -19% | -$1.94M | 0.01% | 266 |
|
|
2023
Q3 | $9.27M | Sell |
166,163
-29,200
| -15% | -$1.66M | 0.01% | 260 |
|
|
2023
Q2 | $12.5M | Sell |
195,363
-43,300
| -18% | -$2.38M | 0.01% | 249 |
|
|
2023
Q1 | $12.2M | Hold |
238,663
| – | – | 0.01% | 247 |
|
|
2022
Q4 | $8.55M | Sell |
238,663
-6,900
| -3% | -$233K | 0.01% | 250 |
|
|
2022
Q3 | $6.24M | Sell |
245,563
-7,600
| -3% | -$190K | 0.01% | 267 |
|
|
2022
Q2 | $5.44M | Sell |
253,163
-10,000
| -4% | -$247K | ﹤0.01% | 279 |
|
|
2022
Q1 | $8.39M | Sell |
263,163
-4,800
| -2% | -$133K | 0.01% | 269 |
|
|
2021
Q4 | $7.88M | Sell |
267,963
-18,300
| -6% | -$465K | 0.01% | 278 |
|
|
2021
Q3 | $6.36M | Sell |
286,263
-9,026
| -3% | -$212K | ﹤0.01% | 283 |
|
|
2021
Q2 | $7M | Sell |
295,289
-22,759
| -7% | -$458K | ﹤0.01% | 279 |
|
|
2021
Q1 | $6.18M | Sell |
318,048
-574,397
| -64% | -$11.5M | ﹤0.01% | 280 |
|
|
2020
Q4 | $15.6M | Sell |
892,445
-1,500
| -0.2% | -$23.5K | 0.01% | 241 |
|
|
2020
Q3 | $12.2M | Hold |
893,945
| – | – | 0.01% | 234 |
|
|
2020
Q2 | $13.6M | Sell |
893,945
-4,000
| -0.4% | -$56.3K | 0.01% | 222 |
|
|
2020
Q1 | $9.97M | Sell |
897,945
-27,400
| -3% | -$380K | 0.01% | 217 |
|
|
2019
Q4 | $12.7M | Sell |
925,345
-10,700
| -1% | -$144K | 0.01% | 229 |
|
|
2019
Q3 | $12.3M | Sell |
936,045
-307,200
| -25% | -$3.85M | 0.01% | 227 |
|
|
2019
Q2 | $15M | Sell |
1,243,245
-5,300
| -0.4% | -$60.7K | 0.01% | 229 |
|
|
2019
Q1 | $13M | Sell |
1,248,545
-10,300
| -0.8% | -$98.8K | 0.01% | 230 |
|
|
2018
Q4 | $9.65M | Sell |
1,258,845
-935,709
| -43% | -$8.13M | 0.01% | 232 |
|
|
2018
Q3 | $23.9M | Sell |
2,194,554
-2,876,340
| -57% | -$35M | 0.02% | 214 |
|
|
2018
Q2 | $63.6M | Hold |
5,070,894
| – | – | 0.05% | 162 |
|
|
2018
Q1 | $68.1M | Sell |
5,070,894
-613,633
| -11% | -$8.21M | 0.05% | 157 |
|
|
2017
Q4 | $80.8M | Sell |
5,684,527
-106,863
| -2% | -$1.54M | 0.06% | 154 |
|
|
2017
Q3 | $77.3M | Sell |
5,791,390
-758,638
| -12% | -$9.75M | 0.06% | 155 |
|
|
2017
Q2 | $74.9M | Sell |
6,550,028
-3,039,469
| -32% | -$37.3M | 0.06% | 155 |
|
|
2017
Q1 | $126M | Buy |
9,589,497
+881,225
| +10% | +$11.6M | 0.11% | 121 |
|
|
2016
Q4 | $120M | Sell |
8,708,272
-202,200
| -2% | -$2.62M | 0.12% | 119 |
|
|
2016
Q3 | $111M | Sell |
8,910,472
-270,500
| -3% | -$3.57M | 0.11% | 125 |
|
|
2016
Q2 | $111M | Sell |
9,180,972
-152,050
| -2% | -$1.85M | 0.12% | 115 |
|
|
2016
Q1 | $128M | Buy |
9,333,022
+8,700
| +0.1% | +$108K | 0.13% | 112 |
|
|
2015
Q4 | $108M | Buy |
9,324,322
+42,700
| +0.5% | +$493K | 0.11% | 125 |
|
|
2015
Q3 | $110M | Buy |
9,281,622
+990,000
| +12% | +$12.9M | 0.12% | 127 |
|
|
2015
Q2 | $120M | Sell |
8,291,622
-50,650
| -0.6% | -$724K | 0.12% | 129 |
|
|
2015
Q1 | $105M | Sell |
8,342,272
-20,100
| -0.2% | -$236K | 0.1% | 137 |
|
|
2014
Q4 | $92.7M | Sell |
8,362,372
-44,150
| -0.5% | -$500K | 0.09% | 134 |
|
|
2014
Q3 | $105M | Sell |
8,406,522
-43,600
| -0.5% | -$550K | 0.11% | 119 |
|
|
2014
Q2 | $121M | Sell |
8,450,122
-135,461
| -2% | -$1.67M | 0.13% | 115 |
|
|
2014
Q1 | $92.3M | Sell |
8,585,583
-36,739
| -0.4% | -$345K | 0.1% | 131 |
|
|
2013
Q4 | $81.7M | Sell |
8,622,322
-11,200
| -0.1% | -$101K | 0.1% | 131 |
|
|
2013
Q3 | $81.2M | Sell |
8,633,522
-151,800
| -2% | -$1.39M | 0.11% | 122 |
|
|
2013
Q2 | $75.5M | Buy |
+8,785,322
| New | +$65.5M | 0.11% | 118 |
|
Other funds holding RMBS
Primecap Management's RMBS Position: Q2 2026 in Review
Primecap Management held its Rambus (RMBS) position steady in Q2 2026 at 47,500 shares worth $6.31M. The position accounts for ﹤0.01% of the portfolio, ranked #280.
Primecap Management first reported a position in RMBS in Q2 2013 and has held it in 53 quarters since. The position peaked at $128M in Q1 2016. 614 funds tracked by Wall St. Rank hold RMBS as of Q2 2026.
- Primecap Management held 47,500 shares of Rambus worth $6.31M as of Q2 2026.
- Primecap Management left its Rambus share count unchanged in Q2 2026.
- Rambus made up ﹤0.01% of Primecap Management's portfolio in Q2 2026, its #280 holding.
- Primecap Management first reported a position in Rambus in Q2 2013 and has held it in 53 quarters since.
- Primecap Management's Rambus position peaked at $128M in Q1 2016.
- 614 funds tracked by Wall St. Rank held Rambus as of Q2 2026.
Based on Primecap Management's 13F filing for Q2 2026, filed 14 Aug 2026.