/Investor DB

Rsquared — Full Portfolio

4 tracked investments · listed companies and verified rows first

Monolith Materialsmonolith-corp.cominJun 2021SEC filingmedium confidence

Monolith produces carbon black using a thermal plasma hydrocarbon pyrolysis process, along with hydrogen and steam co-products used for energy.

Advanced ManufacturingCleantechNew MaterialsRedwood City, US

Peter L. Johnson(Executive Officer, Director)Robert J. Hanson(Executive Officer, Director)inRussell Webb(Chief Executive Officer)in

BoardJohannes Nieuwenburg(Director)Jason Montemurro(Director)Douglas Cameron(Director)

Board seatRobert Kerrey· per SEC Form D · $120M raise · filed Jun 2021

Co-investorsAzimuth Capital ManagementImperative VenturesWarburg PincusBlackRockTemasek

Xtremityxtremity.cominMay 2019SEC filingmedium confidence

Xtremity makes the XtremityTT, a thermoformable definitive prosthetic socket system built from an injection-molded, carbon-reinforced polymer preform that clinicians can heat, form, and assemble in about an hour and re-adjust via spot-heating.

HardwareHealthtechMedical DevicesNew MaterialsAspen, US

Mark Joseph(Inventor/Product Designer, company founder)Miguelangel Sosa(Executive Officer, Director)Amy Hill(Executive Officer)Scott Ward(Executive Officer)Maynard Carkhuff(President & CEO)

Board seatRobert Kerrey· per SEC Form D · $10M raise · filed Jun 2019

Co-investorsDecheng CapitalARCH Venture Partners

SiPhox Healthsiphoxhealth.comin𝕏Jan 2023

Siphox Health develops early diagnostic testing technology to detect and manage chronic diseases at home, delivered as a painless 5-minute test that enables frequent monitoring.

ConsumerDigital HealthHealthtechLongevityMedical DevicesWellness & FitnessBoston, US

Michael Dubrovsky(Founder)inDiedrik Vermeulen(Founder)inYaniv Goder(Vice President of Business)Jordan Moradian(Growth Lead)Eric Stepansky(Head of Business)Catherine Fink(Vice President)

Co-investorsDuke Capital PartnersGaingelsIntel CapitalKoru CapitalLongeVCNeer Venture Partners+15 more

Other

Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.

Auris Surgical Robotics

Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.