How many institutional investors hold RMBS?

4 tracked institutional investors disclosed a position in RMBS (RAMBUS INC DEL) in their most recent 13F filing.

Who is the largest institutional holder of RMBS?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in RMBS, valued at $40M.

Where does this RMBS ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

RMBS — RAMBUS INC DEL

Name: RAMBUS INC DEL (RMBS) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About RAMBUS INC DEL (RMBS)

RAMBUS INC DEL (RMBS) appears in the most recent 13F filings of 4 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $40M. Across recent filings, tracked investors recorded 1 new positions, 0 increased, 2 reduced, and 1 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in RMBS

/100

Institutional Distribution

Added / Increased1

Reduced2

Exited1

BearishBullish

Crowded Trade Score™

How many top investors track RMBS

/100

Emerging Interest

4investors

A small number of top investors own this.

UndiscoveredCrowded

151015+

RMBS Ownership Composition

How RAMBUS INC DEL is held across tracked investor types, based on reported 13F positions.

Dominant Type

Other

91% of tracked value

Institutions

tracked investors

Total Reported

$29.9M

combined 13F value

Other90.8%
Hedge Funds9.2%

Other(3)

90.8%

Hedge Funds(1)

9.2%

Tracked investors reporting RMBS

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	117.6K	$10.1M	0.00%	Mar 31, 2026
Izzy Englander	Millennium Management	146.3K	$12.6M	0.01%	Mar 31, 2026
Ray Dalio	Bridgewater Associates	51.9K	$4.5M	0.02%	Mar 31, 2026
Steve Cohen	Point72 Asset Management	30K	$2.8M	0.00%	Dec 31, 2025

Ken GriffinMar 31, 2026
Citadel Advisors
Shares
117.6K
Value
$10.1M
% Portfolio
0.00%
Izzy EnglanderMar 31, 2026
Millennium Management
Shares
146.3K
Value
$12.6M
% Portfolio
0.01%
Ray DalioMar 31, 2026
Bridgewater Associates
Shares
51.9K
Value
$4.5M
% Portfolio
0.02%
Steve CohenDec 31, 2025
Point72 Asset Management
Shares
30K
Value
$2.8M
% Portfolio
0.00%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Ray Dalio	Reduced	-66.39%	$4.5M	May 15, 2026
Ken Griffin	Sold	-100.00%	$0	Feb 17, 2026
Ray Dalio	Reduced	-11.89%	$14.2M	Feb 13, 2026
Ray Dalio	New	—	$18.2K	Nov 13, 2025

Ray Dalio
Reduced
$4.5M(-66.39%)May 15, 2026
Ken Griffin
Sold
$0(-100.00%)Feb 17, 2026
Ray Dalio
Reduced
$14.2M(-11.89%)Feb 13, 2026
Ray Dalio
New
$18.2KNov 13, 2025

Frequently asked questions

How many institutional investors hold RMBS?: 4 tracked institutional investors disclosed a position in RMBS (RAMBUS INC DEL) in their most recent 13F filing.
Who is the largest institutional holder of RMBS?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in RMBS, valued at $40M.
Did institutional ownership of RMBS increase or decrease?: Across recent 13F filings, tracked investors recorded 1 new positions, 0 increased, 2 reduced, and 1 fully exited RMBS.
Where does this RMBS ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.