Jeff Rosenthal is the Co-Founder and Managing Partner of CIV. See sector focus.
Jeff Rosenthal is the Co-Founder and Managing Partner of CIV, and SEC filings show he is also listed as an Executive with CIV GE SPV I in Venice, California. CIV describes itself as a back-and-build firm focused on technology and critical industries, and Rosenthal has said the firm is “built for founders, by founders”; public coverage says CIV targets manufacturing and energy, with emphasis on energy transition, industrial transformation, AI infrastructure, and climate technology. Public sources do not disclose a standard check size or consistent lead/follow pattern. CIV’s publicly named investments include Calibre, Senra Systems, 1001 AI, and Siift AI, with Calibre shown as a lead deal and the others as co-investments. Rosenthal’s background includes co-founding Summit, co-owning Powder Mountain, and making more than 50 early angel investments, including SpaceX, Uber, Warby Parker, Scopely, and Devoted Health. He has also served as a senior advisor to for-profit and nonprofit organizations, including early advisory work for TPG Rise. Public writing is limited, but his public remarks around CIV emphasize founder alignment and building companies in c
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SEC Form D filings name Jeff Rosenthal as a related person of one fund (2026). Each entry links to the original filing on sec.gov.
Form D filings identify related persons of the issuing fund. Being named on a filing does not by itself evidence an investment in any company.
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