Rambus Ownership

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

Recent Insider Transactions

BIT:1RMBS Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
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€72,034	Emiko Higashi	Individual	1,111	€64.84
04 Aug 25	Sell€50,958	John Shinn	Individual	790	€64.50
27 May 25	Sell€89,822	Steven Laub	Individual	1,847	€48.63
19 May 25	Sell€180,270	Steven Laub	Individual	3,653	€49.35
09 May 25	Sell€165,784	Eric Stang	Individual	3,653	€45.38
19 Feb 25	Sell€3,419,878	Xianzhi Fan	Individual	52,327	€65.36
19 Feb 25	Sell€296,612	Necip Sayiner	Individual	4,625	€64.13
12 Dec 24	Sell€136,453	John Shinn	Individual	2,462	€55.42
12 Dec 24	Sell€300,182	Meera Rao	Individual	5,408	€55.51

Insider Trading Volume

Insider Buying: 1RMBS insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of 1RMBS?
Owner Type	Number of Shares	Ownership Percentage
State or Government	46,266	0.043%
Individual Insiders	677,575	0.63%
General Public	7,750,724	7.2%
Institutions	99,119,255	92.1%

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

Top Shareholders

Top 25 shareholders own 65.6% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
13.9%	BlackRock, Inc.	14,979,505	€1.3b	5.37%	0.02%
11.7%	The Vanguard Group, Inc.	12,560,825	€1.1b	0.95%	0.02%
4.65%	T. Rowe Price Group, Inc.	5,006,342	€427.3m	-42.8%	0.04%
4.19%	State Street Global Advisors, Inc.	4,508,997	€384.9m	-1.56%	0.01%
2.59%	EdgePoint Investment Group Inc.	2,787,327	€237.9m	138%	1.17%
2.5%	JP Morgan Asset Management	2,693,898	€230.0m	-20.6%	0.02%
2.5%	Geode Capital Management, LLC	2,687,691	€229.4m	1.35%	0.02%
1.93%	Invesco Ltd.	2,080,473	€177.6m	-51.4%	0.05%
1.87%	BNY Asset Management	2,008,166	€171.4m	13.1%	0.03%
1.83%	Norges Bank Investment Management	1,972,325	€168.4m	10.5%	0.01%
1.78%	Dimensional Fund Advisors LP	1,917,673	€163.7m	2.64%	0.03%
1.61%	Westwood Management Corp.	1,737,062	€148.3m	41%	1.25%
1.58%	Swedbank Robur Fonder AB	1,700,000	€145.1m	0%	0.09%
1.3%	Northern Trust Global Investments	1,393,686	€119.0m	-1.9%	0.02%
1.28%	Raymond James Financial, Inc.	1,372,109	€117.1m	46%	0.04%
1.25%	Neuberger Berman Investment Advisers LLC	1,348,038	€115.1m	5.14%	0.1%
1.2%	Charles Schwab Investment Management, Inc.	1,287,035	€109.9m	2.44%	0.02%
1.19%	Congress Asset Management Company, LLP	1,276,926	€109.0m	6.45%	0.83%
1.12%	Wellington Management Group LLP	1,206,766	€103.0m	1.07%	0.02%
1.11%	Voya Investment Management LLC	1,199,373	€102.4m	8.14%	0.12%
1.05%	Emerald Advisers, LLC	1,126,245	€96.1m	34.6%	2.19%
0.89%	Westfield Capital Management Company, L.P.	962,419	€82.2m	-11.6%	0.38%
0.89%	Hood River Capital Management LLC	955,600	€81.6m	1.13%	1.06%
0.86%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	930,452	€79.4m	2.91%	0.02%
0.82%	Assenagon Asset Management S.A.	881,562	€75.3m	393%	0.11%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/10/06 22:06
End of Day Share Price	2025/10/06 00:00
Earnings	2025/06/30
Annual Earnings	2024/12/31

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 24 analysts. 8 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
Nam Hyung Kim	Arete Research Services LLP
Tristan Gerra	Baird