Estimated market cap $8.81BShares outstanding from the company’s latest SEC filing (all share classes, each priced at its own close; ADRs converted to ADS) × last close from Tiingo. Updated daily. This figure: shares as of Sep 30, 2026, last close Nov 13, 2026.107.10M shares, shares as of Sep 30, 2026CIK 917273The SEC’s Central Index Key, the number it uses to identify every company and person that files.
Insider trades, 12 mo
0 buys · 29 sells
$19.49M sold, open market
Congress trades, 24 mo
—
No disclosed trades
13F holders
…
Lobbying, 12 mo
—
No lobbying filings
Federal contracts, 12 mo
—
None matched
Ask your AI:
Latest 10-Q
What changed in Rambus, Inc.'s latest quarterly report, compared with the one before.
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Insider trades
Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.
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13F holders
Funds that report this stock, checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
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Top 10 holders.Premium lists every holder, with CSV downloads.
Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.
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Lobbying
What Rambus, Inc. and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.
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H-1B labor applications at Rambus, Inc.
17 certified in 12 mo
Labor condition applications decided by the Department of Labor, matched to Rambus, Inc. by employer name. An application is not a hire.
Median yearly wage offered, full-time certified applications, Jul 2025 to Jun 2026: $156,853The wage the employer offered, as filed, with its unit. The yearly figure restates it per year (hourly x 2,080, weekly x 52, every two weeks x 26, monthly x 12) from the low end of the offered range. It is not what the worker was paid.
H-1B labor applications decided at Rambus, Inc. by quarter
We match the employer's name to a public company automatically, including a reviewed list of subsidiaries. A subsidiary can be missed and a similar name can be matched wrongly. The files carry no worker names.
Institutional ownership over time
How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.
13F holders, Q3 2026Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
388
67.0% of shares · 151 added
Latest 10-Q
Q3 2026
What changed in Rambus, Inc.'s latest quarterly report, compared with the one before.
Filed Oct 26, 2026 · Quarter ended Sep 30, 2026
Summary text goes here once it has loaded. Summary text goes here once it has loaded.
Summary text goes here once it has loaded.
Summary text goes here once it has loaded.
AI summary of changes vs the prior report. Written by AI from the paragraphs that changed, and checked against them. This is information, not investment advice.
Compared with the 10-Q for the quarter ended Jun 30, 2026. Sections compared: management's discussion, risk factors, legal proceedings and controls and procedures.
Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.
No open-market insider trades reported since Sep 22, 2026. Insiders have two business days to file.
Recent insider trades
How the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss.
388 funds report RMBS. Values checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
Funds own 93% of shares (Q2 2026)Fund managers with more than $100 million in US-listed stocks file a 13F each quarter. It lists their long stock positions only (shorts, options and bonds are left out) and can arrive up to 45 days after the quarter ends, so this is a snapshot of the quarter end. We add up the shares every fund reports in this class and divide by the shares outstanding. The total can pass 100%: the same shares are often reported by more than one manager (an adviser and the fund it runs), lent shares can be reported twice, and the share count can be out of date after buybacks. We divided 100.67M reported shares by 108.46M shares, from the company’s SEC filing as of Jun 30, 2026.
622 funds hold the stock.
Q3 2026: 67% · 5,560 of ~8,900 funds reported so farFunds have 45 days after a quarter ends to file. This quarter’s reports are still arriving, so the figure only counts the funds that have filed so far and will usually rise.
Q2 202591%
Q3 202596%
Q4 202593%
Q1 202695%
Q2 202693%
Q3 2026 (so far)67%
Q3 2026. 55 new, 151 added to, 135 trimmed, 288 exited since Q2 2026.
Download CSVEvery fund that holds RMBS, not only these ten. A download holds at most 10,000 rows; narrow the filters to get a smaller slice.
Trades by members of Congress
Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.
Recent congressional trades
How the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss.
What Rambus, Inc. and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.
No recent lobbying filings for this company.
Institutional ownership over time
How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.
Funds holding the stock
Shares they report
Funds holding the stock by quarter
Q2 2013
115
—
58.51M
$502.7M
Q3 2013
120
+5
65.43M
$617.3M
Q4 2013
120
0
66.66M
$631.2M
Q1 2014
121
+1
71.13M
$764.8M
Q2 2014
137
+16
80.63M
$1.2B
Q3 2014
135
-2
78.04M
$973.3M
Q4 2014
141
+6
78.26M
$867.9M
Q1 2015
126
-15
80.01M
$1.0B
Q2 2015
125
-1
84.94M
$1.2B
Q3 2015
143
+18
86.94M
$1.0B
Q4 2015
148
+5
89.11M
$1.0B
Q1 2016
160
+12
91.34M
$1.3B
Q2 2016
166
+6
84.19M
$1.0B
Q3 2016
173
+7
87.88M
$1.1B
Q4 2016
172
-1
89.85M
$1.2B
Q1 2017
159
-13
89.94M
$1.2B
Q2 2017
163
+4
85.20M
$974.0M
Q3 2017
168
+5
86.29M
$1.2B
Q4 2017
172
+4
89.87M
$1.3B
Q1 2018
186
+14
89.78M
$1.2B
Q2 2018
171
-15
89.85M
$1.1B
Q3 2018
177
+6
88.35M
$963.7M
Q4 2018
187
+10
88.24M
$676.9M
Q1 2019
175
-12
87.58M
$915.3M
Q2 2019
180
+5
89.77M
$1.1B
Q3 2019
196
+16
91.43M
$1.2B
Q4 2019
181
-15
96.28M
$1.3B
Q1 2020
179
-2
94.51M
$1.0B
Q2 2020
204
+25
95.77M
$1.5B
Q3 2020
192
-12
94.99M
$1.3B
Q4 2020
224
+32
96.28M
$1.7B
Q1 2021
213
-11
95.76M
$1.9B
Q2 2021
219
+6
97.38M
$2.3B
Q3 2021
236
+17
93.44M
$2.1B
Q4 2021
258
+22
95.93M
$2.8B
Q1 2022
275
+17
94.12M
$3.0B
Q2 2022
252
-23
95.79M
$2.1B
Q3 2022
241
-11
93.63M
$2.4B
Q4 2022
303
+62
93.76M
$3.3B
Q1 2023
336
+33
96.39M
$4.9B
Q2 2023
393
+57
97.78M
$6.3B
Q3 2023
349
-44
99.47M
$5.6B
Q4 2023
398
+49
105.93M
$7.2B
Q1 2024
375
-23
106.19M
$6.5B
Q2 2024
363
-12
103.01M
$6.1B
Q3 2024
376
+13
97.18M
$4.1B
Q4 2024
394
+18
95.06M
$5.0B
Q1 2025
414
+20
97.83M
$5.1B
Q2 2025
462
+48
97.41M
$6.2B
Q3 2025
517
+55
103.15M
$10.7B
Q4 2025
559
+42
99.92M
$9.2B
Q1 2026
562
+3
102.80M
$8.8B
Q2 2026
623
+61
100.67M
$13.3B
Q3 2026
388
-235
71.78M
$7.7B
Each point is a quarter-end, from Q2 2013 to Q3 2026. A fund's 13F lists its long positions in US-listed securities as of the last day of the quarter and arrives up to 45 days later, so each point shows holdings at quarter-end, not on the day they were reported.
Common shares only; options and bonds are left out. When a fund amends a report, the amended version is the one counted.
The history follows the company's current CUSIP number (750917106). If the company's shares were ever re-issued under a different CUSIP, the quarters before the change are not part of this series, so the first point (Q2 2013) can be later than the stock's first appearance in 13F reports.
Share counts are adjusted for stock splits; none took place between these quarters. Values are in dollars as reported at the time and are not adjusted.
A quarter appears once our daily update has built its summary. If a summary cannot be built, older reports are kept and the chart shows the quarters it has until the next update repairs it.