Rambus Inc.
DE ˙ DB ˙ US7509171069
142,95 € ↓ -5,25 (-3,54%)
2026-06-04
DEL PRIS
SecurityDE:RMB / Rambus Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership4,489,789 shares
Ownership 3.90%
Dimensional Fund Advisors Lp ownership in RMB / Rambus Inc.

2021-02-16 - Dimensional Fund Advisors Lp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 4,489,789 shares of Rambus Inc. (DE:RMB). This represents 3.9 percent ownership of the company. In their previous filing dated 2021-02-16 , Dimensional Fund Advisors Lp had reported owning 4,489,789 shares, indicating a decrease of 0.00 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2021-02-16 2021-02-16 13G/A 4,489,789 4,489,789 0.00 3.90 0.00
2021-02-16 2021-02-16 13G/A 6,088,854 4,489,789 -26.26 3.90 -28.57
2020-02-12 2020-02-12 13G/A 5,909,106 6,088,854 3.04 5.46 0.18
2019-02-08 2019-02-08 13G 5,909,106 5.45

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-05-07 2026-03-31 13F RAMBUS INC DEL COM 750917106 1,795,295 -98,233 -5.19 154,417 -11.26 0.0321
2026-02-12 2025-12-31 13F RAMBUS INC DEL COM 750917106 1,893,528 -35,169 -1.82 174,012 -13.41 0.0365
2025-11-12 2025-09-30 13F RAMBUS INC DEL COM 750917106 1,928,697 11,024 0.57 200,966 63.69 0.0431
2025-08-12 2025-06-30 13F RAMBUS INC DEL COM 750917106 1,917,673 49,239 2.64 122,773 26.91 0.0284
2025-05-13 2025-03-31 13F RAMBUS INC DEL COM 750917106 1,868,434 134,246 7.74 96,741 5.53 0.0240
2025-02-13 2024-12-31 13F RAMBUS INC DEL COM 750917106 1,734,188 -27,060 -1.54 91,676 23.29 0.0220
2024-11-07 2024-09-30 13F RAMBUS INC DEL COM 750917106 1,761,248 -37,237 -2.07 74,360 -29.63 0.0180
2024-08-09 2024-06-30 13F RAMBUS INC DEL COM 750917106 1,798,485 158,259 9.65 105,673 4.23 0.0276
2024-05-10 2024-03-31 13F RAMBUS INC DEL COM 750917106 1,640,226 -309,685 -15.88 101,382 -23.82 0.0274
2024-02-07 2023-12-31 13F RAMBUS INC DEL COM 750917106 1,949,911 -350,342 -15.23 133,083 3.70 0.0389
2023-11-09 2023-09-30 13F RAMBUS INC DEL COM 750917106 2,300,253 -85,905 -3.60 128,333 -16.19 0.0421
2023-08-09 2023-06-30 13F RAMBUS INC DEL COM 750917106 2,386,158 -400,730 -14.38 153,117 7.19 0.0488
2023-05-12 2023-03-31 13F RAMBUS INC DEL COM 750917106 2,786,888 -772,284 -21.70 142,854 112,382.68 0.0481
2023-02-09 2022-12-31 13F RAMBUS INC DEL COM 750917106 3,559,172 -78,008 -2.14 127 -99.86 0.0377
2022-11-10 2022-09-30 13F RAMBUS INC DEL COM 750917106 3,637,180 4,428 0.12 92,459 18.44 0.0355
2022-08-12 2022-06-30 13F RAMBUS INC DEL COM 750917106 3,632,752 -86,104 -2.32 78,065 -34.18 0.0280
2022-05-13 2022-03-31 13F RAMBUS INC DEL COM 750917106 3,718,856 87,609 2.41 118,597 11.13 0.0365
2022-02-09 2021-12-31 13F RAMBUS INC DEL COM 750917106 3,631,247 -24,832 -0.68 106,720 31.48 0.0323
2021-11-12 2021-09-30 13F RAMBUS INC DEL COM 750917106 3,656,079 -129,062 -3.41 81,166 -9.56 0.0261
2021-08-12 2021-06-30 13F RAMBUS INC DEL COM 750917106 3,785,141 -141,582 -3.61 89,746 17.57 0.0284
2021-05-14 2021-03-31 13F RAMBUS INC DEL COM 750917106 3,926,723 -563,066 -12.54 76,334 -2.63 0.0252
2021-03-08 2020-12-31 13F/A-2 RAMBUS INC DEL COM 750917106 4,489,789 -289,107 -6.05 78,392 19.82 0.0283
2021-02-11 2020-12-31 13F RAMBUS INC DEL COM 750917106 4,489,789 -289,107 78,392 28,311.0236
2020-11-12 2020-09-30 13F RAMBUS INC DEL COM 750917106 4,778,896 -425,328 -8.17 65,423 -17.29 0.0277
2020-08-13 2020-06-30 13F RAMBUS INC DEL COM 750917106 5,204,224 -238,229 -4.38 79,099 30.93 0.0348
2020-05-14 2020-03-31 13F RAMBUS INC DEL COM 750917106 5,442,453 -646,401 -10.62 60,413 -27.97 0.0315
2020-02-14 2019-12-31 13F RAMBUS INC DEL COM 750917106 6,088,854 -162,177 -2.59 83,873 2.23 0.0306
2019-11-12 2019-09-30 13F RAMBUS INC DEL COM 750917106 6,251,031 -8,817 -0.14 82,046 8.86 0.0319
2019-08-13 2019-06-30 13F RAMBUS INC DEL COM 750917106 6,259,848 65,148 1.05 75,369 16.43 0.0293
2019-08-12 2019-03-31 13F/A-2 RAMBUS INC DEL COM 750917106 6,194,700 285,594 4.83 64,734 42.83 0.0258
2019-05-10 2019-03-31 13F RAMBUS INC DEL COM 750917106 6,194,700 285,594 64,734
2019-02-26 2018-12-31 13F/A-1 RAMBUS INC DEL COM 750917106 5,909,106 333,048 5.97 45,323 -25.50 0.0205
2019-02-13 2018-12-31 13F RAMBUS INC DEL COM 750917106 5,909,106 333,048 45,323
2018-11-13 2018-09-30 13F RAMBUS INC DEL COM 750917106 5,576,058 570,825 11.40 60,835 -3.08 0.0232
2018-08-10 2018-06-30 13F RAMBUS INC DEL COM 750917106 5,005,233 399,358 8.67 62,768 1.47 0.0250
2018-05-11 2018-03-31 13F RAMBUS INC DEL COM 750917106 4,605,875 47,804 1.05 61,857 -4.57 0.0258
2018-02-12 2017-12-31 13F RAMBUS INC DEL COM 750917106 4,558,071 83,535 1.87 64,816 8.50 0.0269
2017-11-13 2017-09-30 13F RAMBUS INC DEL COM 750917106 4,474,536 12,609 0.28 59,736 17.13 0.0261
2017-08-11 2017-06-30 13F RAMBUS INC DEL COM 750917106 4,461,927 112,208 2.58 51,001 -10.77 0.0235
2017-05-12 2017-03-31 13F RAMBUS INC DEL COM 750917106 4,349,719 216,124 5.23 57,155 0.41 0.0273
2017-02-09 2016-12-31 13F RAMBUS INC DEL COM 750917106 4,133,595 87,927 2.17 56,920 12.55 0.0284
2016-11-10 2016-09-30 13F RAMBUS INC DEL COM 750917106 4,045,668 199,791 5.19 50,571 8.86 0.0273
2016-08-09 2016-06-30 13F RAMBUS INC DEL COM 750917106 3,845,877 304,699 8.60 46,457 -4.59 0.0267
2016-05-13 2016-03-31 13F RAMBUS INC DEL COM 750917106 3,541,178 285,472 8.77 48,691 29.04 0.0291
2016-02-10 2015-12-31 13F RAMBUS INC DEL COM 750917106 3,255,706 17,717 0.55 37,734 -1.24 0.0235
2015-11-13 2015-09-30 13F RAMBUS INC DEL COM 750917106 3,237,989 226,210 7.51 38,207 -12.45 0.0251
2015-08-14 2015-06-30 13F RAMBUS INC DEL COM 750917106 3,011,779 107,918 3.72 43,641 19.51 0.0267
2015-05-14 2015-03-31 13F RAMBUS INC DEL COM 750917106 2,903,861 214,297 7.97 36,516 22.42 0.0231
2015-02-06 2014-12-31 13F RAMBUS INC DEL COM 750917106 2,689,564 139,701 5.48 29,828 -6.27 0.0196
2014-11-13 2014-09-30 13F RAMBUS INC DEL COM 750917106 2,549,863 157,817 6.60 31,822 -6.97 0.0225
2014-08-08 2014-06-30 13F RAMBUS INC DEL COM 750917106 2,392,046 344,486 16.82 34,206 55.40 0.0238
2014-05-14 2014-03-31 13F RAMBUS INC DEL COM 750917106 2,047,560 -10,879 -0.53 22,011 12.91 0.0164
2014-02-12 2013-12-31 13F RAMBUS INC DEL COM 750917106 2,058,439 190,108 10.18 19,494 11.01 0.0152
2013-11-13 2013-09-30 13F RAMBUS INC DEL COM 750917106 1,868,331 427,617 29.68 17,561 41.90 0.0152
2013-08-15 2013-06-30 13F RAMBUS INC DEL COM 750917106 1,440,714 1,440,714 12,376 0.0117
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.