Ticker · CUSIP 750917106

RMBS

RAMBUS INC DEL
Technology·Semiconductors
···Share
Holders (tracked)
17
Combined shares
10,435,455
Combined value
$464.53M
Last close
$120.03
Quarter
2025Q4
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
17112024Q12025Q4
Price is +169.6% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

24 events
  1. Rao Meera
    2026-04-14
    Sold $1.01M @ $118.08
    Insider sell
  2. AQR Capital Management added2026-02-17
    +163,522 shares · 2025Q4
    Position
  3. Ken Griffin (Citadel Advisors) added2026-02-17
    +101,199 shares · 2025Q4
    Position
  4. D.E. Shaw & Co. trimmed2026-02-17
    −67,612 shares · 2025Q4
    Position
  5. Izzy Englander (Millennium Mgmt) added2026-02-17
    +65,346 shares · 2025Q4
    Position
  6. Steve Cohen (Point72) trimmed2026-02-17
    −136,646 shares · 2025Q4
    Position
  7. T. Rowe Price added2026-02-17
    +140,226 shares · 2025Q4
    Position
  8. Wellington Management added2026-02-17
    +183,488 shares · 2025Q4
    Position
  9. Two Sigma Investments added2026-02-17
    +66,513 shares · 2025Q4
    Position
  10. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +101,605 shares · 2025Q4
    Position
  11. Ray Dalio (Bridgewater Associates) trimmed2026-02-13
    −20,818 shares · 2025Q4
    Position
  12. Norges Bank (Norway SWF) opened position2026-02-10
    +1,701,551 shares · 2025Q4
    Position
  13. Ken Fisher (Fisher Asset Mgmt) added2026-02-09
    +364,396 shares · 2025Q4
    Position
  14. Paul Tudor Jones (Tudor Investment) exited2025-12-09
    −10,689 shares · 2025Q3
    Position
  15. Two Sigma Investments trimmed2025-11-14
    −53,763 shares · 2025Q3
    Position
  16. D.E. Shaw & Co. added2025-11-14
    +33,571 shares · 2025Q3
    Position
  17. T. Rowe Price added2025-11-14
    +551,954 shares · 2025Q3
    Position
  18. Wellington Management trimmed2025-11-14
    −456,320 shares · 2025Q3
    Position
  19. AQR Capital Management trimmed2025-11-14
    −154,142 shares · 2025Q3
    Position
  20. Izzy Englander (Millennium Mgmt) trimmed2025-11-14
    −221,280 shares · 2025Q3
    Position
  21. Steve Cohen (Point72) opened position2025-11-14
    +166,667 shares · 2025Q3
    Position
  22. Ray Dalio (Bridgewater Associates) trimmed2025-11-13
    −51,755 shares · 2025Q3
    Position
  23. Norges Bank (Norway SWF) exited2025-11-13
    −1,972,325 shares · 2025Q3
    Position
  24. Ken Fisher (Fisher Asset Mgmt) opened position2025-11-12
    +152,882 shares · 2025Q3
    Position

Insider activity

Last 30 days
Net (open-market)
−$1.01M
Buys
0 · $0
Sells
1 · $1.01M
Unique insiders
1
DateInsiderCodeSharesPriceValue
04-14Rao Meera
Insider
S8,538$118.08$1.01M
View full insider history for RMBS →
Follow-the-investor returns
If you'd copied each holder of RMBS…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
T. Rowe Price2016Q1$0.15+82145.1%$646.4M
Norges Bank (Norway SWF)2016Q1$38.42+212.4%$204.2M
Steve Cohen (Point72)2023Q3$51.38+133.6%$3.6M
Wellington Management2017Q3$55.25+117.2%$112.1M
Ray Dalio (Bridgewater Associates)2019Q4$59.43+102.0%$18.5M
D.E. Shaw & Co.2016Q1$67.00+79.1%$2.2M
Two Sigma Investments2016Q3$67.50+77.8%$17.3M
AQR Capital Management2016Q1$68.68+74.8%$85.4M
Ken Griffin (Citadel Advisors)2016Q1$85.40+40.6%$9.6M
Ken Griffin (Citadel Advisors)2016Q1$85.40+40.6%$9.6M
Ken Griffin (Citadel Advisors)2016Q1$85.40+40.6%$9.6M
Paul Tudor Jones (Tudor Investment)2016Q1$90.61+32.5%$12.2M
Paul Tudor Jones (Tudor Investment)2016Q1$90.61+32.5%$12.2M
Izzy Englander (Millennium Mgmt)2016Q2$92.48+29.8%$1.7M
Izzy Englander (Millennium Mgmt)2016Q2$92.48+29.8%$1.7M
Izzy Englander (Millennium Mgmt)2016Q2$92.48+29.8%$1.7M
Ken Fisher (Fisher Asset Mgmt)2025Q3$95.53+25.6%$62.1M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.
New positions2
Added to7
Trimmed3
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
14
$35.45B
2022Q2
12
$22.58B
2022Q3
11
$27.2M
2022Q4
14
$826.2M
2023Q1
18
$1.22B
2023Q2
17
$1.54B
2023Q3
13
$1.29B
2023Q4
10
$1.31B
2024Q1
11
$1.32B
2024Q2
11
$1.44B
2024Q3
15
$270.7M
2024Q4
14
$225.0M
2025Q1
12
$127.2M
2025Q2
13
$331.1M
2025Q3
14
$267.1M
2025Q4
17
$464.5M

Who owns RMBS

17 super-investors · 2025Q4
Tracked stake
10.44M
shares
Combined value
$465M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added11Trim3
#ManagerSharesValue
1Norges Bank
Norway SWF
1.70M$156M
2Wellington Management933.9K$86M
3AQR Capital Management711.1K$65M
4Ken Fisher
Fisher Asset Mgmt
517.3K$48M
5Izzy Englander
Millennium Mgmt
262.6K$24M
6Ken Griffin
Citadel Advisors
188.2K$17M
7Ken Griffin
Citadel Advisors
169.9K$16M
8Ray Dalio
Bridgewater Associates
154.3K$14M
9Two Sigma Investments144.4K$13M
10Paul Tudor Jones
Tudor Investment
101.6K$9M
11Ken Griffin
Citadel Advisors
80.1K$7M
12Steve Cohen
Point72
30.0K$3M
13D.E. Shaw & Co.18.5K$2M
14Izzy Englander
Millennium Mgmt
14.4K$1M
15Izzy Englander
Millennium Mgmt
13.6K$1M
16Paul Tudor Jones
Tudor Investment
8.4K$772K
17T. Rowe Price5.39M$495K

Recent moves

20 transactions
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