Rambus Inc.
DE ˙ DB ˙ US7509171069
148,20 € ↑5,25 (3,67%)
2026-06-05
DEL PRIS
SecurityDE:RMB / Rambus Inc.
InstitutionTwo Sigma Advisers, Lp
Latest Disclosed Ownership46,700 shares
Latest Disclosed Value $ 4,291,263
Two Sigma Advisers, Lp reports 16.46% increase in ownership of RMB / Rambus Inc.

On February 17, 2026 - Two Sigma Advisers, Lp filed a 13F-HR form disclosing ownership of 46,700 shares of Rambus Inc. (DE:RMB) valued at $3,693,036 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 40,100 shares of Rambus Inc.. This represents a change in shares of 16.46% during the quarter. The current value of the position is $6,920,940 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)
2026-02-17 2025-12-31 13F RAMBUS INC DEL COM 750917106 46,700 6,600 16.46 4,291 2.70 0.0083
2025-11-14 2025-09-30 13F RAMBUS INC DEL COM 750917106 40,100 -89,200 -68.99 4,178 -49.52 0.0084
2025-08-14 2025-06-30 13F RAMBUS INC DEL COM 750917106 129,300 -164,500 -55.99 8,278 -45.59 0.0170
2025-05-15 2025-03-31 13F RAMBUS INC DEL COM 750917106 293,800 -141,500 -32.51 15,211 -33.89 0.0342
2025-02-14 2024-12-31 13F RAMBUS INC DEL COM 750917106 435,300 -127,600 -22.67 23,010 -3.18 0.0532
2024-11-14 2024-09-30 13F RAMBUS INC DEL COM 750917106 562,900 356,200 172.33 23,766 95.68 0.0557
2024-08-14 2024-06-30 13F RAMBUS INC DEL COM 750917106 206,700 147,800 250.93 12,146 233.65 0.0271
2024-05-15 2024-03-31 13F RAMBUS INC DEL COM 750917106 58,900 9,000 18.04 3,641 6.90 0.0084
2024-02-14 2023-12-31 13F RAMBUS INC DEL COM 750917106 49,900 -8,300 -14.26 3,406 4.90 0.0080
2023-11-14 2023-09-30 13F RAMBUS INC DEL COM 750917106 58,200 35,300 154.15 3,247 120.97 0.0083
2023-08-14 2023-06-30 13F RAMBUS INC DEL COM 750917106 22,900 -64,885 -73.91 1,469 -67.35 0.0037
2023-05-15 2023-03-31 13F RAMBUS INC DEL COM 750917106 87,785 -112,700 -56.21 4,500 -37.35 0.0116
2023-02-14 2022-12-31 13F RAMBUS INC DEL COM 750917106 200,485 -53,100 -20.94 7,181 11.40 0.0201
2022-11-14 2022-09-30 13F RAMBUS INC DEL COM 750917106 253,585 -73,100 -22.38 6,446 -8.18 0.0187
2022-08-15 2022-06-30 13F RAMBUS INC DEL COM 750917106 326,685 -64,700 -16.53 7,020 -43.75 0.0199
2022-05-16 2022-03-31 13F RAMBUS INC DEL COM 750917106 391,385 -133,700 -25.46 12,481 -19.12 0.0332
2022-02-14 2021-12-31 13F RAMBUS INC DEL COM 750917106 525,085 -147,600 -21.94 15,432 3.33 0.0387
2021-11-15 2021-09-30 13F RAMBUS INC DEL COM 750917106 672,685 -56,100 -7.70 14,934 -13.57 0.0387
2021-08-16 2021-06-30 13F RAMBUS INC DEL COM 750917106 728,785 66,500 10.04 17,279 34.21 0.0456
2021-05-17 2021-03-31 13F RAMBUS INC DEL COM 750917106 662,285 -113,700 -14.65 12,875 -4.97 0.0354
2021-02-16 2020-12-31 13F RAMBUS INC DEL COM 750917106 775,985 203,700 35.59 13,549 72.93 0.0362
2020-11-16 2020-09-30 13F RAMBUS INC DEL COM 750917106 572,285 1,400 0.25 7,835 -9.70 0.0224
2020-09-15 2020-06-30 13F/A-1 RAMBUS INC DEL COM 750917106 570,885 97,600 20.62 8,677 65.18 0.0255
2020-08-14 2020-06-30 13F RAMBUS INC DEL COM 750917106 570,885 97,600 8,677 25,073.6482
2020-05-15 2020-03-31 13F RAMBUS INC DEL COM 750917106 473,285 -37,400 -7.32 5,253 -25.33 0.0201
2020-02-14 2019-12-31 13F RAMBUS INC DEL COM 750917106 510,685 -6,200 -1.20 7,035 3.70 0.0163
2019-11-14 2019-09-30 13F RAMBUS INC DEL COM 750917106 516,885 -92,000 -15.11 6,784 -7.46 0.0166
2019-08-14 2019-06-30 13F RAMBUS INC DEL COM 750917106 608,885 -119,000 -16.35 7,331 -3.62 0.0182
2019-05-15 2019-03-31 13F RAMBUS INC DEL COM 750917106 727,885 84,000 13.05 7,606 54.00 0.0192
2019-02-14 2018-12-31 13F RAMBUS INC DEL COM 750917106 643,885 -30,524 -4.53 4,939 -32.88 0.0135
2018-11-14 2018-09-30 13F RAMBUS INC DEL COM 750917106 674,409 -130,900 -16.25 7,358 -27.14 0.0180
2018-08-14 2018-06-30 13F RAMBUS INC DEL COM 750917106 805,309 -125,700 -13.50 10,099 -19.23 0.0272
2018-05-15 2018-03-31 13F RAMBUS INC DEL COM 750917106 931,009 159,800 20.72 12,503 14.01 0.0339
2018-02-14 2017-12-31 13F RAMBUS INC DEL COM 750917106 771,209 179,123 30.25 10,967 38.75 0.0296
2017-11-14 2017-09-30 13F RAMBUS INC DEL COM 750917106 592,086 277,052 87.94 7,904 119.49 0.0224
2017-08-14 2017-06-30 13F RAMBUS INC DEL COM 750917106 315,034 93,825 42.41 3,601 23.87 0.0119
2017-05-15 2017-03-31 13F RAMBUS INC DEL COM 750917106 221,209 188,840 583.40 2,907 551.79 0.0095
2017-02-14 2016-12-31 13F RAMBUS INC DEL COM 750917106 32,369 -41,128 -55.96 446 -51.47 0.0017
2016-11-14 2016-09-30 13F RAMBUS INC DEL COM 750917106 73,497 73,497 0.00 919 0.0039
2016-05-16 2016-03-31 13F RAMBUS COMMON STOCK 750917106 0 -29,512 -100.00 0 -100.00
2016-02-16 2015-12-31 13F RAMBUS INC DEL COM 750917106 29,512 -283,785 -90.58 342 -90.75 0.0020
2015-11-16 2015-09-30 13F RAMBUS INC DEL COM 750917106 313,297 -23,400 -6.95 3,697 -24.23 0.0233
2016-02-09 2015-06-30 13F/A-1 RAMBUS INC DEL COMMON STOCK 750917106 336,697 4,800 1.45 4,879 16.89 0.0375
2015-08-14 2015-06-30 13F RAMBUS COMMON STOCK 750917106 339,097 4,917
2016-02-09 2015-03-31 13F/A-1 RAMBUS COMMON STOCK 750917106 331,897 3,200 0.97 4,174 14.51 0.0320
2015-05-15 2015-03-31 13F RAMBUS COMMON STOCK 750917106 319,397 4,015
2016-02-09 2014-12-31 13F/A-1 RAMBUS COMMON STOCK 750917106 328,697 -36,700 -10.04 3,645 -20.07 0.0291
2015-02-17 2014-12-31 13F RAMBUS COMMON STOCK 750917106 328,697 3,646
2016-02-09 2014-09-30 13F/A-1 RAMBUS INC DEL COM 750917106 365,397 -63,100 -14.73 4,560 -25.59 0.0359
2014-11-14 2014-09-30 13F RAMBUS INC DEL COM 750917106 363,097 4,529
2016-02-09 2014-06-30 13F/A-1 RAMBUS COMMON STOCK 750917106 428,497 221,400 106.91 6,128 175.04 0.0493
2014-08-14 2014-06-30 13F RAMBUS COMMON STOCK 750917106 428,497 6,127
2014-05-15 2014-03-31 13F RAMBUS COMMON STOCK 750917106 207,097 29,400 16.55 2,228 32.30 0.0203
2014-02-14 2013-12-31 13F RAMBUS COMMON STOCK 750917106 177,697 139,100 360.39 1,684 363.91 0.0163
2013-11-14 2013-09-30 13F RAMBUS COMMON STOCK 750917106 38,597 3,502 9.98 363 20.60 0.0043
2013-08-14 2013-06-30 13F RAMBUS INC DEL COM 750917106 35,095 35,095 301 0.0043
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.