Rambus Inc.
DE ˙ DB ˙ US7509171069
148,20 € ↑5,25 (3,67%)
2026-06-05
DEL PRIS
SecurityDE:RMB / Rambus Inc.
InstitutionPrincipal Financial Group Inc
Latest Disclosed Ownership373,536 shares
Latest Disclosed Value $ 32,135,301
Principal Financial Group Inc reports 9.27% decrease in ownership of RMB / Rambus Inc.

On May 4, 2026 - Principal Financial Group Inc filed a 13F-HR form disclosing ownership of 373,536 shares of Rambus Inc. (DE:RMB) valued at $26,513,585 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 411,719 shares of Rambus Inc.. This represents a change in shares of -9.27% during the quarter. The current value of the position is $55,358,035 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-04 2026-03-31 13F RAMBUS INC DEL COM 750917106 373,536 -38,183 -9.27 32,135 -15.06 0.0088
2026-02-02 2025-12-31 13F RAMBUS INC DEL COM 750917106 411,719 -61,255 -12.95 37,833 -23.24 0.0193
2025-11-04 2025-09-30 13F RAMBUS INC DEL COM 750917106 472,974 -43,049 -8.34 49,284 49.18 0.0249
2025-08-08 2025-06-30 13F RAMBUS INC DEL COM 750917106 516,023 9,310 1.84 33,036 25.92 0.0175
2025-04-28 2025-03-31 13F RAMBUS INC DEL COM 750917106 506,713 176,579 53.49 26,235 50.34 0.0147
2025-01-31 2024-12-31 13F RAMBUS INC DEL COM 750917106 330,134 4,725 1.45 17,451 27.02 0.0095
2024-10-31 2024-09-30 13F RAMBUS INC DEL COM 750917106 325,409 -98,974 -23.32 13,739 -44.91 0.0076
2024-07-29 2024-06-30 13F RAMBUS INC DEL COM 750917106 424,383 -119,162 -21.92 24,937 -25.78 0.0148
2024-04-29 2024-03-31 13F RAMBUS INC DEL COM 750917106 543,545 -332,863 -37.98 33,597 -43.83 0.0197
2024-02-07 2023-12-31 13F RAMBUS INC DEL COM 750917106 876,408 -49,991 -5.40 59,815 15.73 0.0381
2023-11-02 2023-09-30 13F RAMBUS INC DEL COM 750917106 926,399 -12,903 -1.37 51,684 -14.25 0.0371
2023-08-07 2023-06-30 13F RAMBUS INC DEL COM 750917106 939,302 275,774 41.56 60,275 77.22 0.0412
2023-05-09 2023-03-31 13F RAMBUS INC DEL COM 750917106 663,528 -16,205 -2.38 34,012 39.69 0.0243
2023-02-09 2022-12-31 13F RAMBUS INC DEL COM 750917106 679,733 -30,702 -4.32 24,348 34.82 0.0183
2022-11-09 2022-09-30 13F RAMBUS INC DEL COM 750917106 710,435 -50,380 -6.62 18,060 10.46 0.0144
2022-08-10 2022-06-30 13F RAMBUS INC DEL COM 750917106 760,815 -683,515 -47.32 16,350 -64.50 0.0121
2022-05-09 2022-03-31 13F RAMBUS INC DEL COM 750917106 1,444,330 706,372 95.72 46,060 112.37 0.0183
2022-05-09 2022-03-31 13F RAMBUS INC DEL COM 750917106 730,777 23,305
2022-02-09 2021-12-31 13F RAMBUS INC DEL COM 750917106 737,958 -13,883 -1.85 21,689 29.94 0.0129
2021-11-09 2021-09-30 13F RAMBUS INC DEL COM 750917106 751,841 -39,071 -4.94 16,691 -11.00 0.0109
2021-08-10 2021-06-30 13F RAMBUS INC DEL COM 750917106 790,912 11,510 1.48 18,753 23.77 0.0121
2021-05-10 2021-03-31 13F RAMBUS INC DEL COM 750917106 779,402 -4,294 -0.55 15,152 10.74 0.0107
2021-02-23 2020-12-31 13F/A-1 RAMBUS INC DEL COM 750917106 783,696 -29,898 -3.67 13,683 22.85 0.0101
2021-02-08 2020-12-31 13F RAMBUS INC DEL COM 750917106 783,696 -29,898 13,683 5,383.1031
2020-11-06 2020-09-30 13F RAMBUS INC DEL COM 750917106 813,594 -45,384 -5.28 11,138 -14.70 0.0094
2020-08-05 2020-06-30 13F RAMBUS INC DEL COM 750917106 858,978 -626 -0.07 13,057 36.85 0.0116
2020-05-12 2020-03-31 13F RAMBUS INC DEL COM 750917106 859,604 -21,254 -2.41 9,541 -21.37 0.0106
2020-02-05 2019-12-31 13F RAMBUS INC DEL COM 750917106 880,858 4,367 0.50 12,134 5.48 0.0101
2019-11-13 2019-09-30 13F RAMBUS INC DEL COM 750917106 876,491 -5,975 -0.68 11,504 8.27 0.0101
2019-08-12 2019-06-30 13F RAMBUS INC DEL COM 750917106 882,466 6,211 0.71 10,625 16.03 0.0096
2019-05-10 2019-03-31 13F RAMBUS INC DEL COM 750917106 876,255 -4,625 -0.53 9,157 35.54 0.0085
2019-02-14 2018-12-31 13F RAMBUS INC DEL COM 750917106 880,880 14,142 1.63 6,756 -28.55 0.0072
2018-11-14 2018-09-30 13F RAMBUS INC DEL COM 750917106 866,738 12,413 1.45 9,456 -11.74 0.0083
2018-08-13 2018-06-30 13F RAMBUS INC DEL COM 750917106 854,325 -11,067 -1.28 10,714 -7.82 0.0098
2018-05-14 2018-03-31 13F RAMBUS INC DEL COM 750917106 865,392 32,096 3.85 11,623 -1.91 0.0112
2018-02-12 2017-12-31 13F RAMBUS INC DEL COM 750917106 833,296 -2,625 -0.31 11,849 6.17 0.0109
2017-11-02 2017-09-30 13F RAMBUS INC DEL COM 750917106 835,921 -27,811 -3.22 11,160 13.04 0.0108
2017-08-08 2017-06-30 13F RAMBUS INC DEL COM 750917106 863,732 5,080 0.59 9,873 -12.50 0.0099
2017-05-11 2017-03-31 13F RAMBUS INC DEL COM 750917106 858,652 27,909 3.36 11,283 -1.37 0.0136
2017-02-13 2016-12-31 13F RAMBUS INC DEL COM 750917106 830,743 10,526 1.28 11,440 11.59 0.0145
2016-11-10 2016-09-30 13F RAMBUS INC DEL COM 750917106 820,217 25,814 3.25 10,252 6.84 0.0135
2016-08-09 2016-06-30 13F RAMBUS INC DEL COM 750917106 794,403 28,849 3.77 9,596 -8.84 0.0134
2016-05-10 2016-03-31 13F RAMBUS INC DEL COM 750917106 765,554 -25,447 -3.22 10,526 14.81 0.0153
2016-02-09 2015-12-31 13F RAMBUS INC DEL COM 750917106 791,001 767,912 3,325.88 9,168 3,270.59 0.0136
2015-11-12 2015-09-30 13F/A-1 RAMBUS INC DEL COM 750917106 23,089 2,747 13.50 272 -7.80 0.0004
2015-11-09 2015-09-30 13F RAMBUS INC DEL COM 750917106 23,089 272
2015-08-10 2015-06-30 13F RAMBUS INC DEL COM 750917106 20,342 -732 -3.47 295 11.32 0.0004
2015-05-14 2015-03-31 13F/A-1 RAMBUS INC DEL COM 750917106 21,074 -270 -1.26 265 11.81 0.0004
2015-05-12 2015-03-31 13F RAMBUS INC DEL COM 750917106 21,074 265
2015-02-12 2014-12-31 13F RAMBUS INC DEL COM 750917106 21,344 -3,750 -14.94 237 -24.28 0.0004
2014-11-13 2014-09-30 13F RAMBUS INC DEL COM 750917106 25,094 4,232 20.29 313 5.03 0.0005
2014-08-12 2014-06-30 13F RAMBUS INC DEL COM 750917106 20,862 -14,913 -41.69 298 -22.60 0.0005
2014-05-13 2014-03-31 13F RAMBUS INC DEL COM 750917106 35,775 -340 -0.94 385 12.57 0.0007
2014-02-12 2013-12-31 13F RAMBUS INC DEL COM 750917106 36,115 5,357 17.42 342 18.34 0.0006
2013-11-05 2013-09-30 13F RAMBUS INC DEL COM 750917106 30,758 -2,015 -6.15 289 2.48 0.0006
2013-08-12 2013-06-30 13F RAMBUS INC DEL COM 750917106 32,773 32,773 282 0.0006
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.