RAMBUS INC
Memory interface protocols and data security hardware for data centers and AI systems
New patent ·
- Sector
- Semiconductors
- Headquarters
- SUNNYVALE, CA
- Latest Form D
- $88.6M, Jun 2011
- Total capital
- $289M
- Federal grants
- None on recordNo awards found in SBIR/STTR, NIH, NSF or DoD records.
- Private capital raised
- $289M
- 2 Form D · last Jun 2011
- 185 months since last filing
- Federal contracts
- None on recordNo federal contract awards found.
- Granted patents
- 27
- 13 pending · first 2026
- Rank in peer group#1 of 29
Capital timeline
Latest events
- Private capital raisedForm D · SEC · 2nd filing$88.6M
- Private capital raisedForm D · SEC · 1st filing$200M
Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.
1 record has no date or no amount, so it isn’t placed on the timeline.
Standing among 29 peers
Line = medianSemiconductors · System
- Granted patents#1 · top 3%
Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.
Founders and team
From SEC Form D filings- Abraham SofaerDirectorNamed in SEC Form D filings
- Bruce DunlevieDirectorNamed in SEC Form D filings
- Christopher PickettExecutive OfficerNamed in SEC Form D filings
- David ShrigleyDirectorNamed in SEC Form D filings
- Dr. Sunlin ChouDirectorNamed in SEC Form D filings
- Eric A. StangDirectorNamed in SEC Form D filings
Show all 24 people
- Harold HughesExecutive Officer, DirectorNamed in SEC Form D filings
- J. Thomas BentleyDirectorNamed in SEC Form D filings
- Jeffery ParkerExecutive OfficerNamed in SEC Form D filings
- J. Thomas BentleyDirectorNamed in SEC Form D filings
- Kevin DonnellyExecutive OfficerNamed in SEC Form D filings
- Laura StarkExecutive OfficerNamed in SEC Form D filings
- Mark A. HorowitzDirectorNamed in SEC Form D filings
- Mark Horowitz, Ph.D.DirectorNamed in SEC Form D filings
- Martin E. ScottExecutive OfficerNamed in SEC Form D filings
- Martin Scott, Ph.D.Executive OfficerNamed in SEC Form D filings
- Michael E. SchroederExecutive OfficerNamed in SEC Form D filings
- Penelope HerscherDirectorNamed in SEC Form D filings
- P. Michael FarmwaldDirectorNamed in SEC Form D filings
- P. Michael Farmwald, Ph.D.DirectorNamed in SEC Form D filings
- Satish RishiExecutive OfficerNamed in SEC Form D filings
- Sharon HoltExecutive OfficerNamed in SEC Form D filings
- Sunlin Thomas ChouDirectorNamed in SEC Form D filings
- Thomas LavelleExecutive OfficerNamed in SEC Form D filings
What it has protected
USPTO · 27 granted of 40- New patentMemories And Memory Components With Interconnected And Redundant Data InterfacesUSPTOUS 12,770,675
- New patentActive Interposer SystemUSPTOUS 12,770,673
- New patentStacked Device CommunicationUSPTOUS 12,769,486
Show all 40 patent records
- Memories And Memory Components With Interconnected And Redundant Data InterfacesOct 20, 2026 · US 12,770,675Granted
- Active Interposer SystemOct 20, 2026 · US 12,770,673Granted
- Stacked Device CommunicationOct 20, 2026 · US 12,769,486Granted
- Dram Metadata AccessOct 20, 2026 · US 12,769,643Granted
- Memory System Using Asymmetric Source-synchronous ClockingOct 20, 2026 · US 12,769,356Granted
- Training And Operations With A Double Buffered Memory TopologyOct 13, 2026 · US 12,762,069Granted
- High Capacity Memory System Using Standard Controller ComponentOct 13, 2026 · US 12,763,130Granted
- Quad-data-rate (qdr) Host Interface In A Memory SystemOct 6, 2026 · US 12,754,694Granted
- Mitigation Of Refresh Management Row HammerOct 6, 2026 · US 12,755,771Granted
- Methods and Circuits for Power Management of a Memory ModuleOct 6, 2026 · US 12,755,772Granted
- Enhanced RefreshSep 17, 2026 · Application 19555116Pending
- Low Memory Overhead Error Detection And CorrectionSep 17, 2026 · Application 19555094Pending
- Memory Management With Implicit Identification Of Cryptographic Keys Using Error Correction DataSep 15, 2026 · US 12,739,118Granted
- Interface Circuit For Converting A Serial Data Stream To A Parallel Data Scheme With Data Strobe Preamble Information In The Serial Data StreamSep 15, 2026 · US 12,737,139Granted
- Serial Presence Detect LoggingSep 10, 2026 · Application 19555183Pending
- Quad-channel Memory ModuleSep 10, 2026 · Application 19555217Pending
- Secure Key Exchange In A Multi-processor DeviceSep 8, 2026 · US 12,732,358Granted
- Sense Amplifier For Active Standby OperationSep 8, 2026 · US 12,731,632Granted
- Joint Command Dynamic Random Access Memory (dram) Apparatus And MethodsSep 8, 2026 · US 12,730,587Granted
- Low Latency Dynamic Random Access Memory (dram) Architecture With Dedicated Read-write Data PathsSep 3, 2026 · Application 19558350Pending
- Composable Memory Ranks For Full Duplex MemorySep 3, 2026 · Application 19163375Pending
- Local Internal Discovery And Configuration Of Individually Selected And Jointly Selected DevicesSep 1, 2026 · US 12,724,729Granted
- Protocol Including Timing Calibration Between Memory Request And Data TransferSep 1, 2026 · US 12,724,728Granted
- Multi-channel Dynamic Random Access Memory (dram) Latency Optimization With Data Interface MultiplexingAug 27, 2026 · Application 19419574Pending
- Methods And Circuits For Slew-rate CalibrationAug 25, 2026 · US 12,719,454Granted
- Synchronous Wired-or Ack Status For Memory With Variable Write LatencyAug 25, 2026 · US 12,720,909Granted
- Device Assisted Cold Page TrackingAug 25, 2026 · US 12,717,488Granted
- Detection And Correction Of Errors Using Limited Error Correction DataAug 20, 2026 · Application 18874584Pending
- Memory Module With Double Data Rate Command And Data Interfaces Supporting Two-channel And Four-channel ModesAug 20, 2026 · Application 19443999Pending
- Memory Bandwidth Aggregation Using Simultaneous Access Of Stacked Semiconductor Memory DieAug 18, 2026 · US 12,712,000Granted
- Hot Data Detection For Disaggregated Memory Using Bloom FiltersAug 18, 2026 · US 12,710,875Granted
- Memory Device Having Hidden RefreshAug 13, 2026 · Application 19381544Pending
- Correlated Multi-codeword Error Correction CodingAug 13, 2026 · Application 19157212Pending
- System Application Of Dram Component With Cache ModeAug 13, 2026 · Application 19245016Pending
- Dram Cache Tag ProbingAug 4, 2026 · US 12,699,653Granted
- Multi-Mode Memory Module and Memory ComponentAug 4, 2026 · US 12,699,659Granted
- Dynamic Random Access Memory (dram) Device With Write Error ProtectionAug 4, 2026 · US 12,699,612Granted
- Multi-processor Device With External Interface FailoverAug 4, 2026 · US 12,699,673Granted
- Reordering Memory ControllerAug 4, 2026 · US 12,699,531Granted
- Integrated Circuit Memory Devices With Unidirectional Ports For Concurrent Interface OperationsJul 30, 2026 · Application 19455130Pending
Related companies, and why
- Arno MerkleSimilar federal contract value in Semiconductors · null in contracts
- DEEPLUX TECHNOLOGY, INCSimilar federal contract value in Semiconductors · null in contracts
- Reduced Energy Microsystems, IncSimilar federal contract value in Semiconductors · null in contracts
- NUMEM INC.Similar federal contract value in Semiconductors · null in contracts
- FBS INCSimilar federal contract value in Semiconductors · null in contracts
- SYNAPTICS INCSimilar federal contract value in Semiconductors · null in contracts
Sources
Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.
How to read this page
Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.
Data freshness
SEC Form D filings through . SBIR and STTR awards through .