Rambus Inc
A fabless designer of memory interface chips and silicon IP that keep fast-moving data flowing, its DDR5 and LPDDR5 chipsets plus controller and security cores power data center and AI systems for chip makers and server builders. Founded in 1990 by engineers Mark Horowitz and Mike Farmwald to close the widening gap between processor and memory speeds, the company's name often draws playful comparisons to action hero Rambo—though the similarity is purely coincidental.
Granted 66.6K · Sold 625.0K
Granted 190.0K · Sold 54.0K
Granted 1.11M · Sold 42.3K
Granted 32.8K · Sold 620.0K
Granted 1.77M · Sold 1.59M
Granted 163.5K · Bought 10.0K
Sold 100.0K
Granted 13.9K
Granted 1.73M · Sold 687.0K
Granted 188.4K · Bought 3.0K · Sold 188.4K
Granted 296.3K
Granted 212.7K · Bought 3.0K · Sold 10.0K
Granted 647.8K · Bought 1.7K · Sold 428.3K
Granted 141.9K · Bought 30.0K
Granted 929.4K · Sold 317.1K
Granted 55.0K · Bought 11.6K
Granted 481.7K · Sold 288.9K
Granted 87.5K · Bought 15.0K
Granted 123.2K · Bought 11.6K · Sold 84.0K
Granted 328.4K · Bought 1.7K · Sold 314.9K
Granted 233.4K · Sold 170.0K
Granted 404.7K · Sold 350.0K
Granted 42.8K
Granted 143.1K · Sold 45.5K
Granted 163.1K · Sold 102.5K
Granted 209.5K · Sold 144.3K
Granted 80.5K · Sold 18.7K
Granted 34.6K · Sold 10.4K
Granted 80.6K · Sold 25.2K
Granted 56.1K
Granted 40.3K
Granted 41.3K
Granted 54.0K · Sold 30.3K
Granted 43.6K · Sold 17.5K
Granted 203.7K · Sold 175.5K
Granted 109.1K · Sold 69.0K
Granted 40.5K · Sold 20.6K
Granted 80.5K · Sold 62.3K
Granted 17.4K
Granted 11.8K
Granted 18.8K · Sold 11.3K
Granted 23.9K · Sold 18.7K
Granted 2.4K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Farmwald MikeDirector · 138 transactions | — | 2.39Mas of Oct 2012 | 66.6K | — | 625.0K |
| Dunlevie BruceDirector · 15 transactions | — | 1.14Mas of Jun 2011 | 190.0K | — | 54.0K |
| Black Ronald DPresident & CEO, Director · 21 transactions | — | 976.4Kas of Feb 2018 | 1.11M | — | 42.3K |
| Horowitz MarkDirector · 89 transactions | — | 791.6Kas of Nov 2011 | 32.8K | — | 620.0K |
| Mooring David GDirector · 60 transactions | — | 760.6Kas of May 2006 | 1.77M | — | 1.59M |
| Hughes HaroldDirector · 24 transactions | — | 669.2Kas of Apr 2013 | 163.5K | 10.0K | — |
| Davidow William HDirector · 10 transactions | — | 648.1Kas of May 2006 | — | — | 100.0K |
| Mitarotonda James ADirector · 2 transactions | — | 544.0Kas of Apr 2022 | 13.9K | — | — |
| Seraphin LucPresident and CEO, Director · 133 transactions | — | 345.8K | 1.73M | — | 687.0K |
| Patel SamirSenior VP, Engineering · 34 transactions | — | 275.1Kas of Jan 2007 | 188.4K | 3.0K | 188.4K |
| Mathur RahulSVP, CFO · 18 transactions | — | 242.4Kas of Feb 2021 | 296.3K | — | — |
| Rishi SatishSVP Finance, CFO · 46 transactions | — | 239.4Kas of Aug 2016 | 212.7K | 3.0K | 10.0K |
| Stark LauraSVP, GM ESD · 187 transactions | — | 237.7Kas of Feb 2018 | 647.8K | 1.7K | 428.3K |
| Bentley J ThomasDirector · 14 transactions | — | 171.9Kas of Oct 2017 | 141.9K | 30.0K | — |
| Fan Xianzhi SeanEVP, COO · 41 transactions | — | 168.4K | 929.4K | — | 317.1K |
| Chou SunlinDirector · 5 transactions | — | 133.2Kas of Oct 2012 | 55.0K | 11.6K | — |
| Kim JaeSVP, GC & Secretary · 138 transactions | — | 129.3Kas of Feb 2021 | 481.7K | — | 288.9K |
| Sofaer Abraham DDirector · 31 transactions | — | 102.5Kas of Dec 2012 | 87.5K | 15.0K | — |
| Herscher PennyDirector · 19 transactions | — | 101.6Kas of Oct 2017 | 123.2K | 11.6K | 84.0K |
| Donnelly KevinSVP, GM MID · 35 transactions | — | 80.6Kas of Feb 2014 | 328.4K | 1.7K | 314.9K |
| Danforth John DSVP General Counsel · 33 transactions | — | 78.0Kas of Jul 2006 | 233.4K | — | 170.0K |
| Eulau Robert KFormer Chief Financial Officer · 44 transactions | — | 71.9Kas of Mar 2006 | 404.7K | — | 350.0K |
| Scott MartinSVP, GM NBG · 18 transactions | — | 66.5Kas of Feb 2014 | 42.8K | — | — |
| Lynch DesmondSVP, CFO · 26 transactions | — | 63.6K | 143.1K | — | 45.5K |
| Shrigley David ADirector · 24 transactions | — | 60.6Kas of May 2019 | 163.1K | — | 102.5K |
| Kissner CharlesDirector · 30 transactions | — | 59.3K | 209.5K | — | 144.3K |
| Fisher Ellis ThomasDirector · 16 transactions | — | 55.8Kas of Apr 2020 | 80.5K | — | 18.7K |
| Jones Keith APrincipal Accounting Officer · 13 transactions | — | 54.7Kas of Mar 2022 | 34.6K | — | 10.4K |
| Higashi EmikoDirector · 16 transactions | — | 54.5K | 80.6K | — | 25.2K |
| Saraf SanjayDirector · 5 transactions | — | 50.2Kas of Apr 2022 | 56.1K | — | — |
| Holt Sharon ESVP, GM SBG · 16 transactions | — | 47.3Kas of Aug 2012 | 40.3K | — | — |
| Gagneja SumeetSVP, CFO · 2 transactions | — | 41.3K | 41.3K | — | — |
| Lavelle Thomas RSVP & GC · 29 transactions | — | 37.4Kas of Feb 2013 | 54.0K | — | 30.3K |
| Schroeder Michael CSVP, HR · 21 transactions | — | 33.0Kas of Feb 2013 | 43.6K | — | 17.5K |
| Stang Eric BDirector · 39 transactions | — | 21.4K | 203.7K | — | 175.5K |
| Shinn JohnSVP, General Counsel · 38 transactions | — | 21.1K | 109.1K | — | 69.0K |
| Rao MeeraDirector · 12 transactions | — | 20.0K | 40.5K | — | 20.6K |
| Sayiner NecipDirector · 18 transactions | — | 18.2K | 80.5K | — | 62.3K |
| Rogge Karen MDirector · 3 transactions | — | 17.4Kas of Apr 2023 | 17.4K | — | — |
| Allen John KChief Accounting Officer · 9 transactions | — | 17.1K | 11.8K | — | — |
| Laub StevenDirector · 10 transactions | — | 7.5K | 18.8K | — | 11.3K |
| Pickett Christopher MSVP, Licensing · 4 transactions | — | 3.7Kas of Aug 2012 | 23.9K | — | 18.7K |
| Peng VictorDirector · 2 transactions | — | 2.4K | 2.4K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -6.54M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.