Rambus Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

DB:RMB Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
26 May 26	Sell€4,950,080	Xianzhi Fan	Individual	37,914	€131.13
08 May 26	Sell€1,086,544	Necip Sayiner	Individual	9,824	€110.60
07 May 26	Sell€159,962	Steven Laub	Individual	1,500	€106.64
10 Mar 26	Sell€346,922	John Shinn	Individual	4,556	€76.89
10 Nov 25	Sell€830,024	Eric Stang	Individual	9,000	€96.76
11 Sep 25	Sell€546,855	Necip Sayiner	Individual	7,500	€72.91
29 Aug 25	Sell€152,168	Steven Laub	Individual	2,261	€67.30
13 Aug 25	Sell€71,345	Emiko Higashi	Individual	1,075	€66.37
08 Aug 25	Sell€472,701	Necip Sayiner	Individual	7,500	€63.03
04 Aug 25	Sell€50,958	John Shinn	Individual	790	€64.50
04 Aug 25	Sell€72,034	Emiko Higashi	Individual	1,111	€64.84

Insider Trading Volume

Insider Buying: RMB insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of RMB?
Owner Type	Number of Shares	Ownership Percentage
State or Government	42,268	0.039%
Individual Insiders	828,815	0.764%
Institutions	107,593,685	99.2%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 67.73% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
15.1%	BlackRock, Inc.	16,288,529	€2.0b	0.19%	0.03%
6.14%	Vanguard Portfolio Management, LLC	6,644,320	€816.7m	0%	0.04%
5.33%	T. Rowe Price Group, Inc.	5,767,709	€709.0m	7.09%	0.06%
5.22%	Invesco Ltd.	5,640,795	€693.4m	50.7%	0.18%
4.46%	Vanguard Capital Management, LLC	4,827,854	€593.4m	0%	0.01%
4.04%	State Street Global Advisors, Inc.	4,373,617	€537.6m	2.87%	0.02%
3.06%	FMR LLC	3,310,114	€406.9m	110%	0.02%
2.89%	Geode Capital Management, LLC	3,124,495	€384.1m	9.91%	0.02%
1.8%	EdgePoint Investment Group Inc.	1,947,742	€239.4m	38.5%	1.19%
1.76%	AllianceBernstein L.P.	1,900,308	€233.6m	0%	0.07%
1.66%	Dimensional Fund Advisors LP	1,795,295	€220.7m	-5.19%	0.03%
1.57%	Norges Bank Investment Management	1,701,551	€209.2m	0%	0.01%
1.55%	JP Morgan Asset Management	1,671,974	€205.5m	-11.2%	0.02%
1.45%	Swedbank Robur Fonder AB	1,563,000	€192.1m	14.7%	0.14%
1.23%	Northern Trust Global Investments	1,334,095	€164.0m	1.41%	0.02%
1.23%	Charles Schwab Investment Management, Inc.	1,326,402	€163.0m	-0.1%	0.02%
1.2%	Neuberger Berman Investment Advisers LLC	1,302,169	€160.1m	-0.29%	0.12%
1.18%	Congress Asset Management Company, LLP	1,275,978	€156.8m	-9.54%	1.18%
1.15%	AQR Capital Management, LLC	1,242,344	€152.7m	76.5%	0.08%
1.11%	UBS Asset Management AG	1,196,993	€147.1m	71%	0.01%
1.04%	Bank of America Corporation	1,119,787	€137.6m	15.1%	0.04%
0.96%	Bessemer Investment Management LLC	1,039,905	€127.8m	1,010%	0.18%
0.93%	Citigroup Inc.	1,007,548	€123.8m	100%	0.07%
0.9%	Columbia Management Investment Advisers, LLC	975,209	€119.9m	72.1%	0.03%
0.79%	Invesco Capital Management LLC	858,253	€105.5m	111%	0.03%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/05/26 16:39
End of Day Share Price	2026/05/26 00:00
Earnings	2026/03/31
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Rambus Inc. is covered by 18 analysts. 9 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Brett Simpson	Arete Research Services LLP
James Fontanelli	Arete Research Services LLP
Tristan Gerra	Baird