Hudson River Trading

Tracked participation in 2 Atlas companies, with 0 explicitly attributed leads.

2portfolio companies

3round participations

0lead positions

Sep 2026latest activity

Capital activity

Portfolio

CompanyLatest valuationFirst → latestRoundsRoleAttributed partner

PPositron$5BSep 2026 → Sep 20261 roundParticipant—

EEtchedChipsEtched is a private AI hardware company building “frontier inference clusters” for serving frontier AI models, with…$21Bvaluation$2.9BraisedRecent roundsSeries D (per Etched progress post wording as a production-acceleration round) · Aug 2026$700M · led by Jane StreetSeries C · Jul 2026$300M · led by Sequoia CapitalMultiple unannounced financings (stealth exit / launch update) totaling $800M · Jun 2026$800M · Andrej Karpathy, Arthur Mensch +11Etched$5BDec 2025 → Jun 20262 roundsParticipant—

DateCompanyRoundRaisedValuationRoleEvidence

Sep 10, 2026PPositronSeries C$875M$5BParticipant

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Jun 30, 2026EEtchedChipsEtched is a private AI hardware company building “frontier inference clusters” for serving frontier AI models, with…$21Bvaluation$2.9BraisedRecent roundsSeries D (per Etched progress post wording as a production-acceleration round) · Aug 2026$700M · led by Jane StreetSeries C · Jul 2026$300M · led by Sequoia CapitalMultiple unannounced financings (stealth exit / launch update) totaling $800M · Jun 2026$800M · Andrej Karpathy, Arthur Mensch +11EtchedMultiple unannounced financings (stealth exit / launch update) totaling $800M$800M$5BParticipant

Source ↗

Dec 01, 2025EEtchedChipsEtched is a private AI hardware company building “frontier inference clusters” for serving frontier AI models, with…$21Bvaluation$2.9BraisedRecent roundsSeries D (per Etched progress post wording as a production-acceleration round) · Aug 2026$700M · led by Jane StreetSeries C · Jul 2026$300M · led by Sequoia CapitalMultiple unannounced financings (stealth exit / launch update) totaling $800M · Jun 2026$800M · Andrej Karpathy, Arthur Mensch +11EtchedSeries B$500M$5BParticipant

Source ↗

DateCompanyRoundRaisedValuationRoleEvidence

Sep 10, 2026PPositronSeries C$875M$5BParticipant

Source ↗