Rambus Inc.
US ˙ NasdaqGS ˙ US7509171069

SecurityRMBS / Rambus Inc.
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership307,244 shares
Latest Disclosed Value $ 26,432,201
First Trust Advisors Lp reports 2.36% increase in ownership of RMBS / Rambus Inc.

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 307,244 shares of Rambus Inc. (US:RMBS) valued at $26,432,201 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 300,156 shares of Rambus Inc.. This represents a change in shares of 2.36% during the quarter. The current value of the position is $44,645,626 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 RAMBUS INC DEL COM 750917106 307,244 7,088 2.36 26,432 -4.17 0.0188
2026-02-13 2025-12-31 13F RAMBUS INC DEL COM 750917106 300,156 99,611 49.67 27,581 31.99 0.0200
2025-11-12 2025-09-30 13F RAMBUS INC DEL COM 750917106 200,545 51,215 34.30 20,897 118.58 0.0155
2025-08-13 2025-06-30 13F RAMBUS INC DEL COM 750917106 149,330 20,601 16.00 9,560 43.46 0.0077
2025-05-14 2025-03-31 13F RAMBUS INC DEL COM 750917106 128,729 42,120 48.63 6,665 45.57 0.0059
2025-02-13 2024-12-31 13F RAMBUS INC DEL COM 750917106 86,609 -113,806 -56.79 4,578 -45.89 0.0040
2024-11-13 2024-09-30 13F RAMBUS INC DEL COM 750917106 200,415 22,819 12.85 8,462 -18.92 0.0081
2024-08-13 2024-06-30 13F RAMBUS INC DEL COM 750917106 177,596 -56,696 -24.20 10,436 -27.94 0.0106
2024-05-13 2024-03-31 13F RAMBUS INC DEL COM 750917106 234,292 50,333 27.36 14,482 15.34 0.0147
2024-02-13 2023-12-31 13F RAMBUS INC DEL COM 750917106 183,959 -57,468 -23.80 12,555 -6.79 0.0137
2023-11-13 2023-09-30 13F RAMBUS INC DEL COM 750917106 241,427 121,382 101.11 13,469 74.85 0.0160
2023-08-14 2023-06-30 13F RAMBUS INC DEL COM 750917106 120,045 2,763 2.36 7,703 28.15 0.0088
2023-05-15 2023-03-31 13F RAMBUS INC DEL COM 750917106 117,282 -10,764 -8.41 6,012 31.07 0.0069
2023-02-09 2022-12-31 13F RAMBUS INC DEL COM 750917106 128,046 31,497 32.62 4,587 86.88 0.0055
2022-11-14 2022-09-30 13F RAMBUS INC DEL COM 750917106 96,549 -62,115 -39.15 2,454 -28.04 0.0032
2022-08-12 2022-06-30 13F RAMBUS INC DEL COM 750917106 158,664 -10,056 -5.96 3,410 -36.62 0.0042
2022-05-13 2022-03-31 13F RAMBUS INC DEL COM 750917106 168,720 46,768 38.35 5,380 50.11 0.0055
2022-02-08 2021-12-31 13F RAMBUS INC DEL COM 750917106 121,952 -42,920 -26.03 3,584 -2.08 0.0035
2021-11-15 2021-09-30 13F RAMBUS INC DEL COM 750917106 164,872 73,588 80.61 3,660 69.13 0.0039
2021-10-12 2021-06-30 13F/A-1 RAMBUS INC DEL COM 750917106 91,284 320 0.35 2,164 22.40 0.0023
2021-08-16 2021-06-30 13F RAMBUS INC DEL COM 750917106 91,284 320 2,164 0.0022
2021-05-14 2021-03-31 13F RAMBUS INC DEL COM 750917106 90,964 49,937 121.72 1,768 146.93 0.0021
2021-02-02 2020-12-31 13F RAMBUS INC DEL COM 750917106 41,027 -48,596 -54.22 716 -41.65 0.0009
2020-11-05 2020-09-30 13F RAMBUS INC DEL COM 750917106 89,623 10,582 13.39 1,227 2.16 0.0020
2020-07-22 2020-06-30 13F RAMBUS INC DEL COM 750917106 79,041 79,041 1,201 0.0021
2018-10-25 2018-09-30 13F RAMBUS INC DEL COM 750917106 0 -115,522 -100.00 0 -100.00
2018-08-02 2018-06-30 13F RAMBUS INC DEL COM 750917106 115,522 115,522 1,449 0.0030
2017-10-24 2017-09-30 13F RAMBUS INC DEL COM 750917106 0 -29,179 -100.00 0 -100.00
2017-08-02 2017-06-30 13F RAMBUS INC DEL COM 750917106 29,179 -24,132 -45.27 334 -52.35 0.0009
2017-05-02 2017-03-31 13F RAMBUS INC DEL COM 750917106 53,311 -163,016 -75.36 701 -76.47 0.0019
2017-02-06 2016-12-31 13F RAMBUS INC DEL COM 750917106 216,327 216,327 2,979 0.0089
2016-11-01 2016-09-30 13F RAMBUS INC DEL COM 750917106 0 -97,451 -100.00 0 -100.00
2016-08-04 2016-06-30 13F RAMBUS INC DEL COM 750917106 97,451 97,451 1,177 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.