Positive Sum Ventures

Tracked participation in 2 Atlas companies, with 1 explicitly attributed lead.

2portfolio companies

2round participations

1lead positions

$120Mled round total

Conviction

Most recent leads

The latest rounds this investor is sourced as leading, newest first.

Jun 2024EtchedSeries A$120M

Capital activity

Portfolio

CompanyLatest valuationFirst → latestRoundsRoleAttributed partner

RRogo—Apr 2025 → Apr 20251 roundParticipantPatrick O’Shaughnessy

EEtchedChipsEtched is an AI chip startup building “frontier inference clusters” designed to accelerate inference (both prefill…$21Bvaluation$2.6BraisedRecent roundsSeries D · Aug 2026$700M · led by Jane StreetMultiple unannounced financings (reported total $800M raised) · Jun 2026$800M · Hudson River Trading, Jane Street +9Unspecified financing tranche within stealth period (pre-Series C) · Jun 2026$500MEtched—Jun 2024 → Jun 20241 round1 led—

DateCompanyRoundRaisedValuationRoleEvidence

Apr 30, 2025RRogoSeries B$50M—Participant · Patrick O’Shaughnessy

Source ↗

Jun 25, 2024EEtchedChipsEtched is an AI chip startup building “frontier inference clusters” designed to accelerate inference (both prefill…$21Bvaluation$2.6BraisedRecent roundsSeries D · Aug 2026$700M · led by Jane StreetMultiple unannounced financings (reported total $800M raised) · Jun 2026$800M · Hudson River Trading, Jane Street +9Unspecified financing tranche within stealth period (pre-Series C) · Jun 2026$500MEtchedSeries A$120M—Lead

Source ↗

DateCompanyRoundRaisedValuationRoleEvidence

Source ↗

Apr 30, 2025RRogoSeries B$50M—Participant · Patrick O’Shaughnessy

Source ↗