Rambus Inc.
DE ˙ DB ˙ US7509171069
148,20 € ↑5,25 (3,67%)
2026-06-05
DEL PRIS
SecurityDE:RMB / Rambus Inc.
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership3,124,495 shares
Latest Disclosed Value $ 268,843,262
Geode Capital Management, Llc reports 9.91% increase in ownership of RMB / Rambus Inc.

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 3,124,495 shares of Rambus Inc. (DE:RMB) valued at $221,776,655 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 2,842,715 shares of Rambus Inc.. This represents a change in shares of 9.91% during the quarter. The current value of the position is $463,050,159 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)
2026-05-15 2026-03-31 13F RAMBUS COM 750917106 3,124,495 281,780 9.91 268,843 2.90 0.0089
2026-02-09 2025-12-31 13F RAMBUS COM 750917106 2,842,715 94,214 3.43 261,256 -8.79 0.0161
2025-11-12 2025-09-30 13F RAMBUS COM 750917106 2,748,501 60,810 2.26 286,432 66.45 0.0183
2025-08-08 2025-06-30 13F RAMBUS COM 750917106 2,687,691 35,744 1.35 172,086 25.30 0.0121
2025-05-13 2025-03-31 13F RAMBUS COM 750917106 2,651,947 74,762 2.90 137,335 0.79 0.0108
2025-02-12 2024-12-31 13F RAMBUS COM 750917106 2,577,185 -44,157 -1.68 136,260 23.10 0.0106
2024-11-12 2024-09-30 13F RAMBUS COM 750917106 2,621,342 21,053 0.81 110,693 -27.57 0.0090
2024-08-09 2024-06-30 13F RAMBUS COM 750917106 2,600,289 109,768 4.41 152,821 -0.74 0.0134
2024-05-13 2024-03-31 13F RAMBUS COM 750917106 2,490,521 61,461 2.53 153,961 -7.14 0.0142
2024-02-13 2023-12-31 13F RAMBUS COM 750917106 2,429,060 116,459 5.04 165,802 28.41 0.0173
2023-11-13 2023-09-30 13F RAMBUS COM 750917106 2,312,601 87,942 3.95 129,118 -9.58 0.0154
2023-08-11 2023-06-30 13F RAMBUS COM 750917106 2,224,659 110,051 5.20 142,790 31.69 0.0168
2023-05-15 2023-03-31 13F RAMBUS COM 750917106 2,114,608 101,970 5.07 108,428 150,493.06 0.0141
2023-02-13 2022-12-31 13F RAMBUS COM 750917106 2,012,638 26,871 1.35 72 -99.86 0.0101
2022-11-14 2022-09-30 13F RAMBUS COM 750917106 1,985,767 16,723 0.85 50,478 19.29 0.0077
2022-08-12 2022-06-30 13F RAMBUS COM 750917106 1,969,044 -7,086 -0.36 42,314 -32.85 0.0062
2022-05-13 2022-03-31 13F RAMBUS COM 750917106 1,976,130 60,311 3.15 63,018 11.92 0.0079
2022-02-11 2021-12-31 13F RAMBUS COM 750917106 1,915,819 61,451 3.31 56,305 36.78 0.0068
2021-11-12 2021-09-30 13F RAMBUS COM 750917106 1,854,368 -109,671 -5.58 41,166 -11.60 0.0055
2021-08-13 2021-06-30 13F RAMBUS COM 750917106 1,964,039 72,634 3.84 46,567 26.65 0.0064
2021-05-12 2021-03-31 13F RAMBUS COM 750917106 1,891,405 125,085 7.08 36,768 19.23 0.0056
2021-02-12 2020-12-31 13F RAMBUS COM 750917106 1,766,320 79,002 4.68 30,839 33.51 0.0052
2020-11-13 2020-09-30 13F RAMBUS COM 750917106 1,687,318 -20,275 -1.19 23,099 -11.00 0.0045
2020-08-13 2020-06-30 13F RAMBUS COM 750917106 1,707,593 59,443 3.61 25,955 41.88 0.0056
2020-05-14 2020-03-31 13F RAMBUS COM 750917106 1,648,150 12,561 0.77 18,293 -18.81 0.0048
2020-02-20 2019-12-31 13F/A-1 RAMBUS COM 750917106 1,635,589 13,643 0.84 22,530 5.84 0.0047
2020-02-13 2019-12-31 13F RAMBUS COM 750917106 1,635,589 13,643 22,530 2,871.2510
2019-11-12 2019-09-30 13F RAMBUS COM 750917106 1,621,946 996 0.06 21,287 9.07 0.0050
2019-08-14 2019-06-30 13F RAMBUS COM 750917106 1,620,950 -13,403 -0.82 19,516 14.28 0.0047
2019-05-14 2019-03-31 13F RAMBUS COM 750917106 1,634,353 68,748 4.39 17,078 42.23 0.0044
2019-03-06 2018-12-31 13F/A-1 RAMBUS COM 750917106 1,565,605 87,048 5.89 12,007 -25.57 0.0037
2019-02-13 2018-12-31 13F RAMBUS COM 750917106 1,565,605 87,048 12,007
2018-11-13 2018-09-30 13F RAMBUS COM 750917106 1,478,557 44,719 3.12 16,131 -10.28 0.0045
2018-08-14 2018-06-30 13F RAMBUS COM 750917106 1,433,838 -19,031 -1.31 17,980 -7.85 0.0055
2018-05-15 2018-03-31 13F RAMBUS COM 750917106 1,452,869 362,588 33.26 19,511 25.85 0.0064
2018-02-13 2017-12-31 13F RAMBUS COM 750917106 1,090,281 58,426 5.66 15,503 12.54 0.0053
2017-11-14 2017-09-30 13F RAMBUS COM 750917106 1,031,855 81,192 8.54 13,775 26.77 0.0051
2017-08-14 2017-06-30 13F RAMBUS COM 750917106 950,663 64,754 7.31 10,866 -6.65 0.0043
2017-06-21 2017-03-31 13F/A-1 RAMBUS INC DEL COM COM 750917106 885,909 52,584 6.31 11,640 1.45 0.0048
2017-05-12 2017-03-31 13F RAMBUS INC DEL COM COM 750917106 885,909 11,640
2017-02-14 2016-12-31 13F RAMBUS INC DEL COM COM 750917106 833,325 30,846 3.84 11,474 14.40 0.0053
2016-11-10 2016-09-30 13F RAMBUS INC DEL COM COM 750917106 802,479 9,778 1.23 10,030 4.75 0.0051
2016-08-12 2016-06-30 13F RAMBUS INC DEL COM COM 750917106 792,701 3,861 0.49 9,575 -11.72 0.0052
2016-05-13 2016-03-31 13F RAMBUS INC DEL COM COM 750917106 788,840 33,812 4.48 10,846 23.95 0.0058
2016-02-12 2015-12-31 13F RAMBUS INC DEL COM COM 750917106 755,028 11,687 1.57 8,750 -0.24 0.0050
2015-11-13 2015-09-30 13F RAMBUS INC DEL COM COM 750917106 743,341 11,740 1.60 8,771 -17.25 0.0053
2015-08-14 2015-06-30 13F RAMBUS INC DEL COM COM 750917106 731,601 18,246 2.56 10,600 18.17 0.0061
2015-05-14 2015-03-31 13F RAMBUS INC DEL COM COM 750917106 713,355 20,125 2.90 8,970 16.69 0.0051
2015-02-12 2014-12-31 13F RAMBUS INC DEL COM COM 750917106 693,230 -100,689 -12.68 7,687 -22.42 0.0046
2014-11-14 2014-09-30 13F RAMBUS INC DEL COM COM 750917106 793,919 -41,631 -4.98 9,908 -17.07 0.0064
2014-08-13 2014-06-30 13F RAMBUS INC DEL COM COM 750917106 835,550 18,778 2.30 11,948 36.08 0.0077
2014-05-14 2014-03-31 13F RAMBUS INC DEL COM COM 750917106 816,772 -66,440 -7.52 8,780 4.99 0.0059
2014-02-14 2013-12-31 13F RAMBUS INC DEL COM COM 750917106 883,212 220,096 33.19 8,363 34.17 0.0058
2013-11-14 2013-09-30 13F RAMBUS INC DEL COM COM 750917106 663,116 173,597 35.46 6,233 48.23 0.0050
2013-08-14 2013-06-30 13F RAMBUS INC DEL COM COM 750917106 489,519 489,519 4,205 0.0037
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.