Rambus Inc.
DE ˙ DB ˙ US7509171069
142,95 € ↓ -5,25 (-3,54%)
2026-06-04
DEL PRIS
SecurityDE:RMB / Rambus Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership1,334,095 shares
Latest Disclosed Value $ 114,772,192
Northern Trust Corp reports 1.41% increase in ownership of RMB / Rambus Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 1,334,095 shares of Rambus Inc. (DE:RMB) valued at $94,694,063 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,315,551 shares of Rambus Inc.. This represents a change in shares of 1.41% during the quarter. The current value of the position is $190,708,880 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.

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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)
2026-05-14 2026-03-31 13F RAMBUS INC DEL COM 750917106 1,334,095 18,544 1.41 114,772 -5.06 0.0031
2026-02-17 2025-12-31 13F RAMBUS INC DEL COM 750917106 1,315,551 -70,323 -5.07 120,886 -16.29 0.0154
2025-11-14 2025-09-30 13F RAMBUS INC DEL COM 750917106 1,385,874 -7,812 -0.56 144,408 61.85 0.0185
2025-08-13 2025-06-30 13F RAMBUS INC DEL COM 750917106 1,393,686 -26,927 -1.90 89,224 21.31 0.0123
2025-05-13 2025-03-31 13F RAMBUS INC DEL COM 750917106 1,420,613 -42,725 -2.92 73,552 -4.91 0.0109
2025-02-14 2024-12-31 13F RAMBUS INC DEL COM 750917106 1,463,338 170,884 13.22 77,352 41.76 0.0110
2024-11-13 2024-09-30 13F RAMBUS INC DEL COM 750917106 1,292,454 -3,800 -0.29 54,567 -28.36 0.0089
2024-08-14 2024-06-30 13F RAMBUS INC DEL COM 750917106 1,296,254 -151,069 -10.44 76,168 -14.86 0.0128
2024-05-14 2024-03-31 13F RAMBUS INC DEL COM 750917106 1,447,323 -181,031 -11.12 89,459 -19.50 0.0155
2024-02-13 2023-12-31 13F RAMBUS INC DEL COM 750917106 1,628,354 113,076 7.46 111,135 31.46 0.0201
2023-11-13 2023-09-30 13F RAMBUS INC DEL COM 750917106 1,515,278 5,856 0.39 84,537 -12.72 0.0164
2023-08-11 2023-06-30 13F RAMBUS INC DEL COM 750917106 1,509,422 -71,299 -4.51 96,860 19.54 0.0186
2023-05-15 2023-03-31 13F RAMBUS INC DEL COM 750917106 1,580,721 -3,223 -0.20 81,028 42.81 0.0161
2023-02-13 2022-12-31 13F RAMBUS INC DEL COM 750917106 1,583,944 -4,177 -0.26 56,737 40.54 0.0119
2022-11-14 2022-09-30 13F RAMBUS INC DEL COM 750917106 1,588,121 5,001 0.32 40,370 18.66 0.0092
2022-08-12 2022-06-30 13F RAMBUS INC DEL COM 750917106 1,583,120 9,904 0.63 34,021 -32.19 0.0073
2022-05-13 2022-03-31 13F RAMBUS INC DEL COM 750917106 1,573,216 -50,655 -3.12 50,170 5.12 0.0088
2022-02-08 2021-12-31 13F RAMBUS INC DEL COM 750917106 1,623,871 -48,023 -2.87 47,726 28.59 0.0078
2021-11-15 2021-09-30 13F RAMBUS INC DEL COM 750917106 1,671,894 -42,017 -2.45 37,116 -8.66 0.0066
2021-08-13 2021-06-30 13F RAMBUS INC DEL COM 750917106 1,713,911 12,010 0.71 40,637 22.83 0.0072
2021-05-12 2021-03-31 13F RAMBUS INC DEL COM 750917106 1,701,901 -448,010 -20.84 33,084 -11.86 0.0062
2021-02-11 2020-12-31 13F RAMBUS INC DEL COM 750917106 2,149,911 -53,052 -2.41 37,537 24.46 0.0073
2020-11-16 2020-09-30 13F RAMBUS INC DEL COM 750917106 2,202,963 -47,256 -2.10 30,159 -11.83 0.0066
2020-08-14 2020-06-30 13F RAMBUS INC DEL COM 750917106 2,250,219 771,894 52.21 34,204 108.45 0.0081
2020-05-14 2020-03-31 13F RAMBUS INC DEL COM 750917106 1,478,325 3,361 0.23 16,409 -19.24 0.0047
2020-02-14 2019-12-31 13F RAMBUS INC DEL COM 750917106 1,474,964 -27,199 -1.81 20,317 3.05 0.0045
2019-11-13 2019-09-30 13F RAMBUS INC DEL COM 750917106 1,502,163 74,450 5.21 19,715 14.70 0.0047
2019-08-13 2019-06-30 13F RAMBUS INC DEL COM 750917106 1,427,713 45,826 3.32 17,189 19.03 0.0041
2019-05-13 2019-03-31 13F RAMBUS INC DEL COM 750917106 1,381,887 28,889 2.14 14,441 39.16 0.0036
2019-02-12 2018-12-31 13F RAMBUS INC DEL COM 750917106 1,352,998 -484 -0.04 10,377 -29.72 0.0029
2018-11-14 2018-09-30 13F RAMBUS INC DEL COM 750917106 1,353,482 28,739 2.17 14,766 -11.11 0.0036
2018-09-18 2018-06-30 13F/A-1 RAMBUS INC DEL COM 750917106 1,324,743 -30,497 -2.25 16,611 -8.73 0.0042
2018-08-14 2018-06-30 13F RAMBUS INC DEL COM 750917106 1,332,842 -22,398 16,713
2018-05-09 2018-03-31 13F RAMBUS INC DEL COM 750917106 1,355,240 10,829 0.81 18,200 -4.80 0.0047
2018-02-14 2017-12-31 13F RAMBUS INC DEL COM 750917106 1,344,411 -32,737 -2.38 19,117 3.99 0.0048
2017-11-13 2017-09-30 13F RAMBUS INC DEL COM 750917106 1,377,148 -30,931 -2.20 18,384 14.22 0.0048
2017-08-11 2017-06-30 13F RAMBUS INC DEL COM 750917106 1,408,079 49,027 3.61 16,095 -9.88 0.0045
2017-05-12 2017-03-31 13F RAMBUS INC DEL COM 750917106 1,359,052 51,776 3.96 17,859 -0.79 0.0051
2017-02-13 2016-12-31 13F RAMBUS INC DEL COM 750917106 1,307,276 33,953 2.67 18,001 13.09 0.0055
2016-11-09 2016-09-30 13F RAMBUS INC DEL COM 750917106 1,273,323 17,582 1.40 15,917 4.92 0.0050
2016-08-12 2016-06-30 13F RAMBUS INC DEL COM 750917106 1,255,741 -103,550 -7.62 15,170 -18.83 0.0049
2016-08-19 2016-03-31 13F/A-1 RAMBUS INC DEL COM 750917106 1,359,291 -1,032 -0.08 18,690 18.55 0.0062
2016-05-13 2016-03-31 13F RAMBUS INC DEL COM 750917106 1,359,291 18,690
2016-02-12 2015-12-31 13F RAMBUS INC DEL COM 750917106 1,360,323 33,438 2.52 15,766 0.70 0.0052
2015-11-12 2015-09-30 13F RAMBUS INC DEL COM 750917106 1,326,885 1,326,885 0.00 15,657 0.0052
2015-08-13 2015-06-30 13F RAMBUS INC DEL COM 750917106 0 -1,273,522 -100.00 0 -100.00
2015-05-14 2015-03-31 13F RAMBUS INC DEL COM 750917106 1,273,522 24,427 1.96 16,014 15.60 0.0048
2015-02-12 2014-12-31 13F RAMBUS INC DEL COM 750917106 1,249,095 -48,000 -3.70 13,853 -14.42 0.0042
2014-11-13 2014-09-30 13F RAMBUS INC DEL COM 750917106 1,297,095 -7,903 -0.61 16,188 -13.26 0.0051
2014-08-14 2014-06-30 13F RAMBUS INC DEL COM 750917106 1,304,998 -131,434 -9.15 18,662 20.84 0.0058
2014-05-14 2014-03-31 13F RAMBUS INC DEL COM 750917106 1,436,432 -147,809 -9.33 15,443 2.93 0.0049
2014-02-21 2013-12-31 13F/A-1 RAMBUS INC DEL COM 750917106 1,584,241 30,103 1.94 15,003 2.70 0.0048
2014-02-12 2013-12-31 13F RAMBUS INC DEL COM 750917106 1,584,241 15,003
2013-11-13 2013-09-30 13F RAMBUS INC DEL COM 750917106 1,554,138 31,622 2.08 14,609 11.70 0.0051
2013-08-09 2013-06-30 13F RAMBUS INC DEL COM 750917106 1,522,516 1,522,516 13,079 0.0047
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.