Rambus Inc (RMBS) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

2,612,682Shares held by institutions

$208,256,882Value of institutional holdings

93.97%Institutional ownership %

2.01%Shares Changed QoQ

455No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Rambus Inc (NASDAQ:RMBS) showed up in the 13F filings of 539 institutional investors as of December 2025.

These investors collectively held 87.7% of Rambus's outstanding shares in December 2025, down from 94.7% in September 2025.
They increased total shares held in Rambus by 0.36% from the prior quarter, while the number of investors in RMBS increased 38.21% year over year.
Activity in RMBS broke down as 285 buyers, 189 sellers, and 65 unchanged among 539 total holders.
Institutional investors collectively held 95.83Mn shares in Rambus as of December 2025, up by 342.62K shares quarter on quarter, and down 4.81Mn shares year over year.
As of December 31, 2025, BlackRock, Inc. held the largest stake in Rambus with 16.28Mn shares, accounting for 14.89% of total shares outstanding.
The biggest buyers of Rambus for the quarter ending December 2025 included Invesco Ltd. (1.72Mn), NORGES BANK (1.7Mn), Swedbank AB (1.03Mn), DRIEHAUS CAPITAL MANAGEMENT LLC (954.16K), BlackRock, Inc. (466.49K).
The largest sellers of Rambus for the quarter ending December 2025 were Jpmorgan Chase & Co (3.05Mn), Bank Of America Corp /De/ (1.85Mn), EdgePoint Investment Group Inc. (1.28Mn), Bank of New York Mellon Corp (504.18K), VANGUARD GROUP INC (410.84K).
Rambus's 10 largest shareholders as of December 2025 include BlackRock, Inc. (16.28Mn), VANGUARD GROUP INC (12.29Mn), State Street Corp (4.25Mn), Invesco Ltd. (4.15Mn), GEODE CAPITAL MANAGEMENT, LLC (2.84Mn), Swedbank AB (2.73Mn), Jpmorgan Chase & Co (2.07Mn), ALLIANCEBERNSTEIN L.P. (1.9Mn), DIMENSIONAL FUND ADVISORS LP (1.89Mn), NORGES BANK (1.7Mn) per Business Quant data.

539 Institutional Holders

2,612,682 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	466,493	2.95%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	-410,844	-3.23%	$0.00
Nuveen, LLC	31 Dec, 2025	-181,035	-14.11%	$0.00
Barclays Plc	31 Dec, 2025	-88,181	-7.94%	$0.00
State Street Corp	31 Dec, 2025	-138,422	-3.15%	$0.00
T. Rowe Price Investment Management, Inc.	31 Dec, 2025	-17,934	-2.46%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	28,167	221.77%	$0.00
Invesco Ltd.	31 Dec, 2025	1,716,621	70.58%	$0.00
Allspring Global Investments Holdings, LLC	31 Dec, 2025	26,773	5.40%	$0.00
PEAK6 LLC	31 Dec, 2025	35,296	0.00%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	94,214	3.43%	$0.00
UBS Group AG	31 Dec, 2025	-110,135	-19.47%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	3,173	144.56%	$0.00
Swedbank AB	31 Dec, 2025	1,026,000	60.35%	$0.00
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	31 Dec, 2025	25,215	8.66%	$0.00
Jpmorgan Chase & Co	31 Dec, 2025	-3,048,333	-59.61%	$0.00
OSAIC HOLDINGS, INC.	31 Dec, 2025	-7,583	-3.38%	$0.00
ALLIANCEBERNSTEIN L.P.	31 Dec, 2025	78,278	4.30%	$0.00
Man Group plc	31 Dec, 2025	28,565	21.26%	$0.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	-35,169	-1.82%	$0.00

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