Rambus Inc.
US ˙ NasdaqGS ˙ US7509171069

SecurityRMBS / Rambus Inc.
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership1,302,169 shares
Latest Disclosed Value $ 111,719,586
Neuberger Berman Group LLC reports 0.29% decrease in ownership of RMBS / Rambus Inc.

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 1,302,169 shares of Rambus Inc. (US:RMBS) valued at $112,025,599 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,305,951 shares of Rambus Inc.. This represents a change in shares of -0.29% during the quarter. The current value of the position is $222,228,162 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 Common 750917106 1,302,169 -3,782 -0.29 111,720 -7.01 0.0850
2026-02-13 2025-12-31 13F RAMBUS Common 750917106 1,305,951 -176,057 -11.88 120,147 -22.19 0.0894
2025-11-12 2025-09-30 13F RAMBUS Common 750917106 1,482,008 133,970 9.94 154,413 78.92 0.1128
2025-08-25 2025-06-30 13F/A-1 RAMBUS Common 750917106 1,348,038 65,870 5.14 86,300 29.46 0.0664
2025-08-13 2025-06-30 13F RAMBUS Common 750917106 1,348,038 65,870 86,300 0.0344
2025-05-13 2025-03-31 13F RAMBUS Common 750917106 1,282,168 -376,196 -22.68 66,664 -23.99 0.0558
2025-02-13 2024-12-31 13F RAMBUS Common 750917106 1,658,364 -88,899 -5.09 87,701 18.89 0.0696
2024-11-14 2024-09-30 13F RAMBUS Common 750917106 1,747,263 -135,675 -7.21 73,764 -33.33 0.0576
2024-11-14 2024-06-30 13F/A-1 RAMBUS Common 750917106 1,882,938 -1,628,192 -46.37 110,641 -49.04 0.0908
2024-08-13 2024-06-30 13F RAMBUS Common 750917106 1,882,938 -1,628,192 110,641 0.0908
2024-11-14 2024-03-31 13F/A-1 RAMBUS Common 750917106 3,511,130 1,162,966 49.53 217,105 35.45 0.1795
2024-05-13 2024-03-31 13F RAMBUS Common 750917106 3,511,130 1,162,966 217,105 0.1794
2024-11-14 2023-12-31 13F/A-2 RAMBUS Common 750917106 2,348,164 -483,446 -17.07 160,289 1.47 0.1398
2024-02-09 2023-12-31 13F RAMBUS Common 750917106 2,348,164 -483,446 160,289 0.1398
2023-11-14 2023-09-30 13F RAMBUS Common 750917106 2,831,610 35,894 1.28 157,969 -11.69 0.1439
2023-08-11 2023-06-30 13F RAMBUS Common 750917106 2,795,716 -737,061 -20.86 178,874 -0.91 0.1599
2023-05-12 2023-03-31 13F RAMBUS Common 750917106 3,532,777 -1,061,824 -23.11 180,523 9.45 0.1674
2023-02-13 2022-12-31 13F RAMBUS Common 750917106 4,594,601 -543,727 -10.58 164,943 25.81 0.1617
2022-11-15 2022-09-30 13F RAMBUS Common 750917106 5,138,328 69,862 1.38 131,099 20.20 0.1369
2022-08-15 2022-06-30 13F RAMBUS Common 750917106 5,068,466 847,817 20.09 109,071 -18.99 0.1096
2022-05-23 2022-03-31 13F/A-1 RAMBUS Common 750917106 4,220,649 701,583 19.94 134,646 31.95 0.1141
2022-05-13 2022-03-31 13F RAMBUS Common 750917106 4,220,649 701,583 132,997 0.1163
2022-02-11 2021-12-31 13F RAMBUS Common 750917106 3,519,066 -601,244 -14.59 102,046 12.76 0.0801
2021-11-12 2021-09-30 13F RAMBUS Common 750917106 4,120,310 62,747 1.55 90,495 -5.23 0.0791
2021-08-13 2021-06-30 13F RAMBUS Common 750917106 4,057,563 -161,182 -3.82 95,492 17.14 0.0833
2021-05-13 2021-03-31 13F RAMBUS Common 750917106 4,218,745 1,070,201 33.99 81,520 48.95 0.0779
2021-02-10 2020-12-31 13F RAMBUS Common 750917106 3,148,544 -36,931 -1.16 54,728 25.65 0.0567
2020-11-12 2020-09-30 13F RAMBUS Common 750917106 3,185,475 154,123 5.08 43,556 -5.41 0.0517
2020-08-13 2020-06-30 13F RAMBUS Common 750917106 3,031,352 -59,397 -1.92 46,045 34.18 0.0572
2020-05-14 2020-03-31 13F RAMBUS Common 750917106 3,090,749 65,307 2.16 34,317 -17.65 0.0523
2020-02-12 2019-12-31 13F RAMBUS Common 750917106 3,025,442 129,430 4.47 41,672 9.61 0.0486
2019-11-13 2019-09-30 13F RAMBUS Common 750917106 2,896,012 184,216 6.79 38,020 16.44 0.0464
2019-08-13 2019-06-30 13F RAMBUS Common 750917106 2,711,796 -31,143 -1.14 32,652 13.95 0.0391
2019-05-13 2019-03-31 13F RAMBUS Common 750917106 2,742,939 186,130 7.28 28,655 46.11 0.0351
2019-02-12 2018-12-31 13F RAMBUS Common 750917106 2,556,809 281,357 12.36 19,612 -21.00 0.0273
2018-11-16 2018-09-30 13F/A-1 RAMBUS Common 750917106 2,275,452 -1,038,503 -31.34 24,825 -40.29 0.0281
2018-11-13 2018-09-30 13F RAMBUS Common 750917106 2,275,452 -1,038,503 24,825
2018-08-13 2018-06-30 13F RAMBUS Common 750917106 3,313,955 -83,018 -2.44 41,573 -8.87 0.0459
2018-05-08 2018-03-31 13F RAMBUS Common 750917106 3,396,973 -35,535 -1.04 45,618 -6.54 0.0521
2018-02-14 2017-12-31 13F RAMBUS Common 750917106 3,432,508 -370,810 -9.75 48,812 -3.86 0.0561
2017-11-15 2017-09-30 13F RAMBUS COMMON STOCK 750917106 3,803,318 329,930 9.50 50,774 27.89 0.0635
2017-08-08 2017-06-30 13F RAMBUS COMMON STOCK 750917106 3,473,388 -151,823 -4.19 39,701 -16.66 0.0510
2017-05-10 2017-03-31 13F RAMBUS COMMON STOCK 750917106 3,625,211 46,970 1.31 47,635 -3.32 0.0615
2017-02-06 2016-12-31 13F RAMBUS COMMON STOCK 750917106 3,578,241 -59,213 -1.63 49,272 8.37 0.0662
2016-11-02 2016-09-30 13F RAMBUS COMMON STOCK 750917106 3,637,454 14,151 0.39 45,468 3.88 0.0617
2016-08-05 2016-06-30 13F RAMBUS COMMON STOCK 750917106 3,623,303 59,259 1.66 43,769 -10.69 0.0603
2016-05-06 2016-03-31 13F RAMBUS COMMON STOCK 750917106 3,564,044 280,018 8.53 49,006 28.75 0.0674
2016-01-28 2015-12-31 13F RAMBUS COMMON STOCK 750917106 3,284,026 51,463 1.59 38,062 -0.21 0.0498
2015-11-10 2015-09-30 13F RAMBUS COMMON STOCK 750917106 3,232,563 549,167 20.47 38,144 -1.90 0.0491
2015-07-31 2015-06-30 13F RAMBUS COMMON STOCK 750917106 2,683,396 297,620 12.47 38,882 29.60 0.0432
2015-05-06 2015-03-31 13F RAMBUS COMMON STOCK 750917106 2,385,776 2,385,776 0.00 30,001 0.0320
2015-02-05 2014-12-31 13F RAMBUS COMMON STOCK 750917106 0 -2,178,344 -100.00 0 -100.00
2014-11-04 2014-09-30 13F RAMBUS COMMON STOCK 750917106 2,178,344 -14,356 -0.65 27,185 -13.30 0.0279
2014-08-05 2014-06-30 13F RAMBUS COMMON STOCK 750917106 2,192,700 -326,603 -12.96 31,356 15.78 0.0306
2014-05-05 2014-03-31 13F RAMBUS COMMON STOCK 750917106 2,519,303 25,097 1.01 27,083 14.66 0.0275
2014-02-11 2013-12-31 13F RAMBUS COMMON STOCK 750917106 2,494,206 487,943 24.32 23,620 25.25 0.0243
2013-10-29 2013-09-30 13F/A-1 RAMBUS COMMON STOCK 750917106 2,006,263 43,772 2.23 18,859 11.87 0.0209
2013-08-13 2013-06-30 13F RAMBUS COMMON STOCK 750917106 1,962,491 1,962,491 16,858 0.0200
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.