Rambus Inc.
US ˙ NasdaqGS ˙ US7509171069

SecurityRMBS / Rambus Inc.
InstitutionStephens Inc /ar/
Latest Disclosed Ownership32,981 shares
Latest Disclosed Value $ 2,837,355
Stephens Inc /ar/ reports 10.17% increase in ownership of RMBS / Rambus Inc.

On April 28, 2026 - Stephens Inc /ar/ filed a 13F-HR form disclosing ownership of 32,981 shares of Rambus Inc. (US:RMBS) valued at $2,837,355 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 29,936 shares of Rambus Inc.. This represents a change in shares of 10.17% during the quarter. The current value of the position is $5,585,332 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)
2026-04-28 2026-03-31 13F RAMBUS INC DEL COM 750917106 32,981 3,045 10.17 2,837 3.16 0.0355
2026-02-05 2025-12-31 13F RAMBUS INC DEL COM 750917106 29,936 -6,206 -17.17 2,751 -26.96 0.0342
2025-10-27 2025-09-30 13F RAMBUS INC DEL COM 750917106 36,142 32,612 923.85 3,766 1,573.33 0.0480
2025-07-29 2025-06-30 13F RAMBUS INC DEL COM 750917106 3,530 -8,162 -69.81 226 -62.81 0.0031
2025-05-01 2025-03-31 13F RAMBUS INC DEL COM 750917106 11,692 11,692 605 0.0089
2024-08-06 2024-06-30 13F RAMBUS INC DEL COM 750917106 0 -3,824 -100.00 0 -100.00
2024-05-15 2024-03-31 13F RAMBUS INC DEL COM 750917106 3,824 3,631 1,881.35 236 1,715.38 0.0037
2024-02-13 2023-12-31 13F RAMBUS INC DEL COM 750917106 193 0 0.00 13 30.00 0.0002
2023-11-14 2023-09-30 13F RAMBUS INC DEL COM 750917106 193 193 11 0.0002
2022-08-03 2022-06-30 13F RAMBUS INC DEL OM 750917106 0 -125,642 -100.00 0 -100.00
2022-05-04 2022-03-31 13F RAMBUS INC DEL OM 750917106 125,642 71,192 130.75 4,007 150.44 0.0653
2022-03-07 2021-12-31 13F RAMBUS INC DEL OM 750917106 54,450 54,450 1,600 0.0242
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.