DOSSIER · 13F Holders · Q1 2026Technology · Semiconductors & Related Devices
RMBS

RAMBUS INC DEL

584 institutions still hold RAMBUS INC DEL as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 750917106·Semiconductors & Related Devices·584 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$5.8B
visible holders
Holders
584
filers reporting
Concentration
24.05%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

584 institutions reported RMBS in Q1 2026. BlackRock, Inc. leads at 24.1% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$1.4B16.3M0.02%Q1 2026
02
Vanguard Portfolio Management
CIK 0002100121· Index
$572M6.6M0.03%Q1 2026
03
Invesco Ltd.
CIK 0000914208
$559M6.5M0.05%Q1 2026
04
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$415M4.8M0.01%Q1 2026
05
STATE STREET CORP
CIK 0000093751
$376M4.4M0.01%Q1 2026
06
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$290M3.4M0.03%Q1 2026
07
FMR LLC
CIK 0000315066
$285M3.3M0.01%Q1 2026
08
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$269M3.1M0.02%Q1 2026
09
Swedbank AB
CIK 0000946431
$219M1.6M0.19%Q2 2026
10
T. Rowe Price Investment Management, Inc.
CIK 0001897612
$206M2.4M0.14%Q1 2026
11
EdgePoint Investment Group Inc.
CIK 0001481669
$168M1.9M1.34%Q1 2026
12
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$154M1.8M0.03%Q1 2026
13
JPMORGAN CHASE & CO
CIK 0000019617
$146M1.8M0.01%Q1 2026
14
BANK OF AMERICA CORP /DE/
CIK 0000070858
$117M1.4M0.01%Q1 2026
15
NORTHERN TRUST CORP
CIK 0000073124· Index
$115M1.3M0.02%Q1 2026
16
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$114M1.3M0.02%Q1 2026
17
Neuberger Berman Group LLC
CIK 0001465109
$112M1.3M0.09%Q1 2026
18
MORGAN STANLEY
CIK 0000895421
$104M1.2M0.01%Q1 2026
19
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$104M1.3M0.05%Q1 2026
20
CONGRESS ASSET MANAGEMENT CO
CIK 0000897378
$103M778K0.64%Q2 2026
Page 1 of 30
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Insiders at RAMBUS INC DEL
Sayiner NecipHigashi EmikoStang Eric BShinn JohnLaub StevenGagneja SumeetRao MeeraAllen John K