Rambus Inc.
US ˙ NasdaqGS ˙ US7509171069

SecurityRMBS / Rambus Inc.
InstitutionOppenheimer Asset Management Inc.
Latest Disclosed Ownership3,221 shares
Latest Disclosed Value $ 277,103
Oppenheimer Asset Management Inc. ownership in RMBS / Rambus Inc.

On April 23, 2026 - Oppenheimer Asset Management Inc. filed a 13F-HR form disclosing ownership of 3,221 shares of Rambus Inc. (US:RMBS) valued at $277,103 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 0 shares of Rambus Inc.. The current value of the position is $468,044 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)
2026-04-23 2026-03-31 13F RAMBUS INC DEL COM 750917106 3,221 3,221 277 0.0008
2026-02-02 2025-12-31 13F RAMBUS INC DEL COM 750917106 0 -100.00 0
2025-11-06 2025-09-30 13F RAMBUS INC DEL COM 750917106 1,928 1,928 201 0.0022
2025-07-31 2025-06-30 13F RAMBUS INC DEL COM 750917106 0 -5,762 -100.00 0 -100.00
2025-04-23 2025-03-31 13F RAMBUS INC DEL COM 750917106 5,762 266 4.84 298 2.76 0.0037
2025-02-05 2024-12-31 13F RAMBUS INC DEL COM 750917106 5,496 120 2.23 291 28.32 0.0035
2024-11-05 2024-09-30 13F RAMBUS INC DEL COM 750917106 5,376 5,376 227 0.0027
2020-08-11 2020-06-30 13F RAMBUS INC DEL COM 750917106 0 -6,347 -100.00 0 -100.00
2020-05-08 2020-03-31 13F RAMBUS INC DEL COM 750917106 6,347 918 16.91 70 -6.67 0.0017
2020-02-07 2019-12-31 13F RAMBUS INC DEL COM 750917106 5,429 476 9.61 75 15.38 0.0016
2019-10-31 2019-09-30 13F RAMBUS INC DEL COM 750917106 4,953 4,953 65 0.0014
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.