Ticker · CUSIP 750917106

RMBS

RAMBUS INC DEL

Technology·Semiconductors

···Share

Holders (tracked)

Combined shares

10,435,455

Combined value

$958.91M

Last close

$126.93

Quarter

2025Q4

Price is +38.1% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$126.93+81.21 (+177.62%)H $126.93 · L $44.05 · Avg Vol 1.8M

Insider sell

Tracked holders · last 8 quarters

+3 vs previous quarter over the last 8.

SEC event timeline

24 events

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

Date	Insider	Code	Shares	Price	Value
04-14	Rao Meera Insider	S	8,538	$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.

Investor	First in	Cost basis	Return	Position value today
Norges Bank (Norway SWF)	2016Q1	$38.42	+230.4%	$216.0M
Steve Cohen (Point72)	2023Q3	$51.38	+147.1%	$3.8M
Wellington Management	2017Q3	$55.83	+127.4%	$118.5M
Ray Dalio (Bridgewater Associates)	2019Q4	$59.43	+113.6%	$19.6M
T. Rowe Price	2016Q1	$59.64	+112.8%	$683.6M
D.E. Shaw & Co.	2016Q1	$67.00	+89.4%	$2.3M
Two Sigma Investments	2016Q3	$67.50	+88.1%	$18.3M
AQR Capital Management	2016Q1	$68.68	+84.8%	$90.3M
Ken Griffin (Citadel Advisors)	2016Q1	$85.40	+48.6%	$10.2M
Ken Griffin (Citadel Advisors)	2016Q1	$85.40	+48.6%	$10.2M
Ken Griffin (Citadel Advisors)	2016Q1	$85.40	+48.6%	$10.2M
Paul Tudor Jones (Tudor Investment)	2016Q1	$90.61	+40.1%	$12.9M
Paul Tudor Jones (Tudor Investment)	2016Q1	$90.61	+40.1%	$12.9M
Izzy Englander (Millennium Mgmt)	2016Q2	$92.48	+37.2%	$1.8M
Izzy Englander (Millennium Mgmt)	2016Q2	$92.48	+37.2%	$1.8M
Izzy Englander (Millennium Mgmt)	2016Q2	$92.48	+37.2%	$1.8M
Ken Fisher (Fisher Asset Mgmt)	2025Q3	$95.53	+32.9%	$65.7M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions2

Norges Bank (Norway SWF)
+1,701,551
$156.4M
Paul Tudor Jones (Tudor Investment)
+101,605
$9.3M

Added to7

Ken Fisher (Fisher Asset Mgmt)
+364,396
$33.5M
Wellington Management
+183,488
$16.9M
AQR Capital Management
+163,522
$15.0M
Ken Griffin (Citadel Advisors)
+101,199
$9.3M
Two Sigma Investments
+66,513
$6.1M
Izzy Englander (Millennium Mgmt)
+65,346
$6.0M
T. Rowe Price
+140,226
$13K

Trimmed3

Steve Cohen (Point72)
−136,646
$12.6M
D.E. Shaw & Co.
−67,612
$6.2M
Ray Dalio (Bridgewater Associates)
−20,818
$1.9M

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	14	23,197,050	$35.45B	—
2022Q2	12	22,611,839	$22.58B	-2
2022Q3	11	22,402,604	$569.5M	-1
2022Q4	14	23,644,913	$847.0M	+3
2023Q1	18	24,906,297	$1.28B	+4
2023Q2	17	25,083,873	$1.61B	-1
2023Q3	13	23,872,782	$1.33B	-4
2023Q4	10	20,112,908	$1.37B	-3
2024Q1	11	22,404,512	$1.38B	+1
2024Q2	11	25,553,061	$1.50B	—
2024Q3	15	7,416,811	$313.1M	+4
2024Q4	14	9,700,431	$512.8M	-1
2025Q1	12	11,198,410	$579.6M	-2
2025Q2	13	9,859,786	$631.2M	+1
2025Q3	14	7,803,485	$813.1M	+1
2025Q4	17	10,435,455	$958.9M	+3

Who owns RMBS

17 super-investors · 2025Q4

Tracked stake

10.44M

Combined value

$959M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New3Added11Trim3

#	Manager	Shares	Value	% of book	Last action
1	T. Rowe Price	5.39M	$495M	0.1%	Added+140.2K
2	Norges Bank Norway SWF	1.70M	$156M	0.0%	New+1.70M
3	Wellington Management	933.9K	$86M	0.0%	Added+183.5K
4	AQR Capital Management	711.1K	$65M	0.0%	Added+163.5K
5	Ken Fisher Fisher Asset Mgmt	517.3K	$48M	0.0%	Added+364.4K
6	Izzy Englander Millennium Mgmt	262.6K	$24M	0.0%	Added+65.3K
7	Ken Griffin Citadel Advisors	188.2K	$17M	0.0%	Added+101.2K
8	Ken Griffin Citadel Advisors	169.9K	$16M	0.0%	Added+101.2K
9	Ray Dalio Bridgewater Associates	154.3K	$14M	0.1%	Trim−20.8K
10	Two Sigma Investments	144.4K	$13M	0.0%	Added+66.5K
11	Paul Tudor Jones Tudor Investment	101.6K	$9M	0.0%	New+101.6K
12	Ken Griffin Citadel Advisors	80.1K	$7M	0.0%	Added+101.2K
13	Steve Cohen Point72	30.0K	$3M	0.0%	Trim−136.6K
14	D.E. Shaw & Co.	18.5K	$2M	0.0%	Trim−67.6K
15	Izzy Englander Millennium Mgmt	14.4K	$1M	0.0%	Added+65.3K
16	Izzy Englander Millennium Mgmt	13.6K	$1M	0.0%	Added+65.3K
17	Paul Tudor Jones Tudor Investment	8.4K	$772K	0.0%	New+101.6K

Recent moves

20 transactions

ADDAQR Capital Management
+163,522 · 2025Q4
TRIMSteve Cohen (Point72)
−136,646 · 2025Q4
ADDT. Rowe Price
+140,226 · 2025Q4
ADDTwo Sigma Investments
+66,513 · 2025Q4
TRIMD.E. Shaw & Co.
−67,612 · 2025Q4
ADDWellington Management
+183,488 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+101,199 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+101,605 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+65,346 · 2025Q4
TRIMRay Dalio (Bridgewater Associates)
−20,818 · 2025Q4
NEWNorges Bank (Norway SWF)
+1,701,551 · 2025Q4
ADDKen Fisher (Fisher Asset Mgmt)
+364,396 · 2025Q4
SOLDPaul Tudor Jones (Tudor Investment)
−10,689 · 2025Q3
NEWSteve Cohen (Point72)
+166,667 · 2025Q3
ADDD.E. Shaw & Co.
+33,571 · 2025Q3
TRIMIzzy Englander (Millennium Mgmt)
−221,280 · 2025Q3
TRIMTwo Sigma Investments
−53,763 · 2025Q3
ADDT. Rowe Price
+551,954 · 2025Q3
TRIMWellington Management
−456,320 · 2025Q3
TRIMAQR Capital Management
−154,142 · 2025Q3

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