Rambus Inc.
DE ˙ DB ˙ US7509171069
142,95 € ↓ -5,25 (-3,54%)
2026-06-04
DEL PRIS
SecurityDE:RMB / Rambus Inc.
InstitutionUs Bancorp \de\
Latest Disclosed Ownership24,246 shares
Latest Disclosed Value $ 2,085,884
Us Bancorp \de\ reports 14.74% increase in ownership of RMB / Rambus Inc.

On May 14, 2026 - Us Bancorp \de\ filed a 13F-HR form disclosing ownership of 24,246 shares of Rambus Inc. (DE:RMB) valued at $1,720,981 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 21,132 shares of Rambus Inc.. This represents a change in shares of 14.74% during the quarter. The current value of the position is $3,465,966 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 24,246 3,114 14.74 2,086 7.42 0.0008
2026-01-30 2025-12-31 13F RAMBUS INC DEL COM 750917106 21,132 8,381 65.73 1,942 46.16 0.0023
2025-11-12 2025-09-30 13F RAMBUS INC DEL COM 750917106 12,751 -731 -5.42 1,329 53.88 0.0016
2025-07-24 2025-06-30 13F RAMBUS INC DEL COM 750917106 13,482 4,821 55.66 863 92.63 0.0011
2025-05-08 2025-03-31 13F RAMBUS INC DEL COM 750917106 8,661 -3,025 -25.89 448 -27.39 0.0006
2025-02-05 2024-12-31 13F RAMBUS INC DEL COM 750917106 11,686 2,327 24.86 618 56.20 0.0008
2024-10-28 2024-09-30 13F RAMBUS INC DEL COM 750917106 9,359 1,518 19.36 395 -14.13 0.0005
2024-08-07 2024-06-30 13F RAMBUS INC DEL COM 750917106 7,841 -3,435 -30.46 461 -33.91 0.0006
2024-05-08 2024-03-31 13F RAMBUS INC DEL COM 750917106 11,276 -2,679 -19.20 697 -26.89 0.0010
2024-02-09 2023-12-31 13F RAMBUS INC DEL COM 750917106 13,955 -436 -3.03 952 18.70 0.0014
2023-11-03 2023-09-30 13F RAMBUS INC DEL COM 750917106 14,391 -1,808 -11.16 803 -22.81 0.0013
2023-08-10 2023-06-30 13F RAMBUS INC DEL COM 750917106 16,199 11,935 279.90 1,039 376.61 0.0017
2023-05-09 2023-03-31 13F RAMBUS COMMON STOCK 750917106 4,264 594 16.19 219 66.41 0.0004
2023-02-13 2022-12-31 13F RAMBUS COMMON STOCK 750917106 3,670 -303 -7.63 131 29.70 0.0002
2022-10-27 2022-09-30 13F RAMBUS COMMON STOCK 750917106 3,973 -2,770 -41.08 101 -30.34 0.0002
2022-08-01 2022-06-30 13F RAMBUS COMMON STOCK 750917106 6,743 -1,141 -14.47 145 -42.23 0.0003
2022-05-11 2022-03-31 13F RAMBUS COMMON STOCK 750917106 7,884 -551 -6.53 251 1.62 0.0004
2022-02-11 2021-12-31 13F RAMBUS COMMON STOCK 750917106 8,435 -408 -4.61 247 25.38 0.0004
2021-11-10 2021-09-30 13F RAMBUS COMMON STOCK 750917106 8,843 8,690 5,679.74 197 4,825.00 0.0004
2021-08-05 2021-06-30 13F RAMBUS COMMON STOCK 750917106 153 -1,126 -88.04 4 -84.00 0.0000
2021-04-28 2021-03-31 13F RAMBUS COMMON STOCK 750917106 1,279 126 10.93 25 25.00 0.0001
2021-02-04 2020-12-31 13F RAMBUS COMMON STOCK 750917106 1,153 153 15.30 20 42.86 0.0000
2020-11-10 2020-09-30 13F RAMBUS COMMON STOCK 750917106 1,000 0 0.00 14 -6.67 0.0000
2020-08-07 2020-06-30 13F RAMBUS COMMON STOCK 750917106 1,000 700 233.33 15 400.00 0.0000
2020-05-13 2020-03-31 13F RAMBUS COMMON STOCK 750917106 300 300 3 0.0000
2019-02-13 2018-12-31 13F RAMBUS COMMON STOCK 750917106 0 -10,061 -100.00 0 -100.00
2018-10-31 2018-09-30 13F RAMBUS COMMON STOCK 750917106 10,061 -433 -4.13 110 -16.67 0.0003
2018-08-08 2018-06-30 13F RAMBUS COMMON STOCK 750917106 10,494 0 0.00 132 -6.38 0.0004
2018-05-08 2018-03-31 13F RAMBUS COMMON STOCK 750917106 10,494 10,286 4,945.19 141 4,600.00 0.0004
2018-02-02 2017-12-31 13F RAMBUS COMMON STOCK 750917106 208 0 0.00 3 0.00 0.0000
2017-11-13 2017-09-30 13F RAMBUS COMMON STOCK 750917106 208 208 3 0.0000
2017-07-19 2017-06-30 13F RAMBUS COMMON STOCK 750917106 0 -303 -100.00 0 -100.00
2017-05-03 2017-03-31 13F RAMBUS COMMON STOCK 750917106 303 0 0.00 4 0.00 0.0000
2017-02-08 2016-12-31 13F RAMBUS COMMON STOCK 750917106 303 0 0.00 4 0.00 0.0000
2016-11-04 2016-09-30 13F RAMBUS COMMON STOCK 750917106 303 0 0.00 4 0.00 0.0000
2016-08-10 2016-06-30 13F RAMBUS COMMON STOCK 750917106 303 0 0.00 4 0.00 0.0000
2016-05-13 2016-03-31 13F RAMBUS COMMON STOCK 750917106 303 0 0.00 4 0.00 0.0000
2016-02-10 2015-12-31 13F RAMBUS COMMON STOCK 750917106 303 303 0.00 4 0.0000
2014-11-14 2014-09-30 13F RAMBUS COMMON STOCK 750917106 0 -200 -100.00 0 -100.00
2014-08-14 2014-06-30 13F RAMBUS COMMON STOCK 750917106 200 0 0.00 3 50.00 0.0000
2014-05-14 2014-03-31 13F RAMBUS COMMON STOCK 750917106 200 200 2 0.0000
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.