Rambus Inc.
DE ˙ DB ˙ US7509171069
142,95 € ↓ -5,25 (-3,54%)
2026-06-04
DEL PRIS
SecurityDE:RMB / Rambus Inc.
InstitutionQuadrant Capital Group Llc
Latest Disclosed Ownership14,904 shares
Latest Disclosed Value $ 1,282,192
Quadrant Capital Group Llc reports 0.19% increase in ownership of RMB / Rambus Inc.

On May 13, 2026 - Quadrant Capital Group Llc filed a 13F-HR/A form disclosing ownership of 14,904 shares of Rambus Inc. (DE:RMB) valued at $1,057,886 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 14,876 shares of Rambus Inc.. This represents a change in shares of 0.19% during the quarter. The current value of the position is $2,130,527 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)
2026-05-13 2026-03-31 13F/A-1 RAMBUS INC DEL COM 750917106 14,904 28 0.19 1,282 -6.15 0.0383
2026-05-11 2026-03-31 13F RAMBUS INC DEL COM 750917106 14,904 28 49 0.0369
2026-02-12 2025-12-31 13F RAMBUS INC DEL COM 750917106 14,876 87 0.59 1,367 -11.36 0.0413
2025-11-13 2025-09-30 13F RAMBUS INC DEL COM 750917106 14,789 9 0.06 1,541 62.90 0.0501
2025-08-13 2025-06-30 13F RAMBUS INC DEL COM 750917106 14,780 -51 -0.34 946 23.34 0.0341
2025-05-13 2025-03-31 13F RAMBUS INC DEL COM 750917106 14,831 12,794 628.08 768 616.82 0.0285
2025-02-13 2024-12-31 13F RAMBUS INC DEL COM 750917106 2,037 -23 -1.12 108 24.42 0.0074
2024-11-12 2024-09-30 13F RAMBUS INC DEL COM 750917106 2,060 -273 -11.70 87 -37.23 0.0060
2024-08-12 2024-06-30 13F RAMBUS INC DEL COM 750917106 2,333 -688 -22.77 137 -26.34 0.0102
2024-05-15 2024-03-31 13F RAMBUS INC DEL COM 750917106 3,021 -624 -17.12 187 -25.00 0.0147
2024-02-08 2023-12-31 13F RAMBUS INC DEL COM 750917106 3,645 145 4.14 249 27.18 0.0214
2023-11-14 2023-09-30 13F RAMBUS INC DEL COM 750917106 3,500 669 23.63 195 7.73 0.0195
2023-08-10 2023-06-30 13F RAMBUS INC DEL COM 750917106 2,831 33 1.18 182 26.57 0.0180
2023-05-11 2023-03-31 13F RAMBUS INC DEL COM 750917106 2,798 126 4.72 143 50.53 0.0149
2023-02-13 2022-12-31 13F RAMBUS INC DEL COM 750917106 2,672 139 5.49 96 48.44 0.0108
2022-11-10 2022-09-30 13F RAMBUS INC DEL COM 750917106 2,533 2,413 2,010.83 64 2,033.33 0.0085
2022-08-09 2022-06-30 13F RAMBUS INC DEL COM 750917106 120 66 122.22 3 50.00 0.0004
2022-05-06 2022-03-31 13F RAMBUS INC DEL COM 750917106 54 54 2 0.0002
2020-05-15 2020-03-31 13F Rambus Com 750917106 0 -388 -100.00 0 -100.00
2020-03-19 2019-12-31 13F/A-1 Rambus Com 750917106 388 388 5 0.0006
2020-02-03 2019-12-31 13F Rambus Com 750917106 388 388 5 16.8957
2019-01-17 2018-12-31 13F Rambus COM 750917106 0 -35 -100.00 0 0.0000
2018-10-29 2018-09-30 13F Rambus COM 750917106 35 0 0.00 0 0.0000
2018-08-08 2018-06-30 13F Rambus COM 750917106 35 0 0.00 0 0.0000
2018-05-10 2018-03-31 13F Rambus COM 750917106 35 0 0.00 0 0.0000
2018-01-31 2017-12-31 13F Rambus Inc Delaware COM 750917106 35 0 0.00 0 0.0000
2017-10-13 2017-09-30 13F Rambus Inc Delaware COM 750917106 35 0 0.00 0 0.0000
2017-08-14 2017-06-30 13F Rambus Inc Delaware COM 750917106 35 0 0.00 0 0.0000
2017-04-10 2017-03-31 13F Rambus Inc Delaware COM 750917106 35 0 0.00 0 0.0000
2017-01-11 2016-12-31 13F Rambus Inc Delaware COM 750917106 35 -68 -66.02 0 -100.00
2016-10-25 2016-09-30 13F Rambus Inc Delaware COM 750917106 103 0 0.00 1 0.00 0.0007
2016-07-28 2016-06-30 13F Rambus Inc Delaware COM 750917106 103 0 0.00 1 0.00 0.0007
2016-04-27 2016-03-31 13F Rambus Inc Delaware COM 750917106 103 103 1 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.