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553 hedge funds and large institutions have $8.82B invested in Rambus in 2026 Q1 according to their latest regulatory filings, with 84 funds opening new positions, 185 increasing their positions, 208 reducing their positions, and 74 closing their positions.

New
Increased
Maintained
Reduced
Closed

85% more call options, than puts

Call options by funds: $49.5M | Put options by funds: $26.8M

14% more first-time investments, than exits

New positions opened: 84 | Existing positions closed: 74

2.3% more ownership

Funds ownership: 92.72%95.02% (+2.3%)

0% more funds holding

Funds holding: 552553 (+1)

4% less capital invested

Capital invested by funds: $9.18B → $8.82B (-$353M)

11% less repeat investments, than reductions

Existing positions increased: 185 | Existing positions reduced: 208

33% less funds holding in top 10

Funds holding in top 10: 32 (-1)

Holders
553
Holders Change
+1
Holders Change %
+0.18%
% of All Funds
6.81%
Holding in Top 10
2
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-33.33%
% of All Funds
0.02%
New
84
Increased
185
Reduced
208
Closed
74
Calls
$49.5M
Puts
$26.8M
Net Calls
+$22.7M
Net Calls Change
+$4.03M
Name Holding Trade Value Shares
Change
Change in
Stake
BlackRock
1
BlackRock
New York
$1.4B +$3.01M +30,120 +0.2%
VPM
2
Vanguard Portfolio Management
Pennsylvania
$572M +$663M +6,644,320 New
Invesco
3
Invesco
Georgia
$559M +$235M +2,350,395 +57%
VCM
4
Vanguard Capital Management
Pennsylvania
$415M +$482M +4,827,854 New
State Street
5
State Street
Massachusetts
$376M +$12.2M +122,054 +3%
T. Rowe Price Associates
6
T. Rowe Price Associates
Maryland
$290M -$200M -2,008,881 -37%
Fidelity Investments
7
Fidelity Investments
Massachusetts
$285M +$173M +1,731,420 +109%
Geode Capital Management
8
Geode Capital Management
Massachusetts
$269M +$28.1M +281,780 +10%
T. Rowe Price Investment Management
9
T. Rowe Price Investment Management
Maryland
$206M +$170M +1,703,180 +248%
EIG
10
EdgePoint Investment Group
Ontario, Canada
$168M +$54M +541,056 +38%
Dimensional Fund Advisors
11
Dimensional Fund Advisors
Texas
$154M -$9.8M -98,233 -5%
JP Morgan Chase
12
JP Morgan Chase
New York
$146M -$22.8M -228,843 -11%
Swedbank
13
Swedbank
Sweden
$134M +$20M +200,000 +15%
Bank of America
14
Bank of America
North Carolina
$117M +$11.2M +111,928 +9%
Northern Trust
15
Northern Trust
Illinois
$115M +$1.85M +18,544 +1%
Charles Schwab
16
Charles Schwab
California
$114M -$129K -1,291 -0.1%
Neuberger Berman Group
17
Neuberger Berman Group
New York
$112M -$377K -3,782 -0.3%
CAM
18
Congress Asset Management
Massachusetts
$110M -$13.4M -134,637 -10%
Morgan Stanley
19
Morgan Stanley
New York
$104M +$32.7M +328,105 +37%
AQR Capital Management
20
AQR Capital Management
Connecticut
$104M +$53.8M +539,330 +76%
Barclays
21
Barclays
United Kingdom
$94.3M +$7.26M +72,717 +7%
Bessemer Group
22
Bessemer Group
New Jersey
$89.5M +$94.4M +946,177 +1,009%
Citigroup
23
Citigroup
New York
$86.7M +$50.4M +505,008 +100%
Ameriprise
24
Ameriprise
Minnesota
$83.9M +$40.8M +408,530 +72%
UBS Group
25
UBS Group
Switzerland
$82.3M +$50M +500,717 +110%