RAMBUS INC (RMBS) Stock Institutional Trading Activity


RAMBUS INC (RMBS) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q3 2025), investors with some of the largest reported share count changes include Sequoia Financial Advisors, Polen Capital Management, Renaissance Technologies LLC, and Lountzis Asset Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q2 2020Renaissance Technologies LLCSell-326,6004,101,086$62,337
Q1 2020Renaissance Technologies LLCSell-58,2144,427,686$49,147
Q4 2019Renaissance Technologies LLCBuy82,7004,485,900$61,793
Q3 2019Renaissance Technologies LLCSell-146,6864,403,200$57,792
Q2 2019Renaissance Technologies LLCSell-187,8004,549,886$54,781
Q1 2019Renaissance Technologies LLCBuy953,3004,737,686$49,509
Q4 2018Renaissance Technologies LLCBuy194,2003,784,386$29,026
Q3 2018Renaissance Technologies LLCSell-811,6003,590,186$39,169
Q1 2018Renaissance Technologies LLCBuy170,5004,401,786$59,116
Q4 2017Renaissance Technologies LLCBuy941,8004,231,286$60,169
Q3 2017Renaissance Technologies LLCBuy380,9003,289,486$43,915
Q2 2017Renaissance Technologies LLCBuy832,3862,908,586$33,245
Q1 2017Renaissance Technologies LLCBuy110,0002,076,200$27,281
Q4 2016Renaissance Technologies LLCBuy253,3001,966,200$27,075
Q3 2016Renaissance Technologies LLCSell-31,0001,712,900$21,411
Q2 2016Renaissance Technologies LLCSell-219,0001,743,900$21,066
Q1 2016Renaissance Technologies LLCSell-248,6001,962,900$26,990
Q4 2015Renaissance Technologies LLCBuy419,1002,211,500$25,631
Q3 2015Renaissance Technologies LLCBuy336,3001,792,400$21,150
Q2 2015Renaissance Technologies LLCBuy421,2141,456,100$21,099
Q1 2015Renaissance Technologies LLCBuy250,0861,034,886$13,014
Q4 2014Renaissance Technologies LLCSell-66,900784,800$8,703
Q3 2014Renaissance Technologies LLCBuy88,700851,700$10,629
Q2 2014Renaissance Technologies LLCBuy261,500763,000$10,911
Q1 2014Renaissance Technologies LLCBuy53,500501,500$5,391
Q4 2013Renaissance Technologies LLCSell-197,600448,000$4,243
Q3 2013Renaissance Technologies LLCSell-42,500645,600$6,069
Q2 2013Renaissance Technologies LLCBuy688,100688,100$5,911

Frequently asked questions about RMBS activity

  • Which institutional owners are buying RMBS?

    Institutional owners buying RMBS include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in RMBS activity?

    "Buy" means an investor increased their reported position in RMBS compared to the prior reporting period. This reflects growing exposure to RAMBUS INC (RMBS) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in RMBS increasing?

    Institutional interest in RMBS can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.