Cantos

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Portfolio companies

Cantos is on record against 38 companies, each listed on its own site.

Funding records for these companies

8 of these companies have a funding record on file.

Fund vehicles on file

Cantos has 4 venture fund vehicles on file with the SEC, run from San Francisco, California, with first sales running from 2024 to 2026. 4 Form D notices, originals and amendments, have been filed for them, the first on November 15, 2024 and the latest on September 9, 2026. Together they have taken in $5,634,301 from 13 investor positions, most recently on September 4, 2026. The smallest investment any of them will accept is $1,000, rising to $200,000. One vehicle is still showing room to take more.

Vehicles41 still open
Closed$5.6M$5,634,301
Target$5.6M1 uncapped, excluded
Since last close54dSeptember 4, 2026
Vehicle Vintage Target Closed Remaining First sale Days Min check LPs Status
Canto of Plymouth, a series of Cantos Fund, LP
Limited Partnership · Delaware-organised
2026 $3M $3M — September 4, 2026 54 $100K 7 fully sold
Canto of Jupiter III, a series of Cantos Fund, LP
Limited Partnership · Delaware-organised
2026 $800K $800K — August 24, 2026 65 $1K 2 fully sold
Canto of Arcadia, a series of Cantos Fund, LP
Limited Partnership · Delaware-organised
2026 $1.8M $1.8M — July 31, 2026 89 $200K 4 fully sold
Cantos Ventures IV, L.P.
Limited Partnership · Delaware-organised
2024 no cap set — — — — — 0 open
People named in the fund filings

The filings for these vehicles name 2 people and entities, with the role each filing gives.

Registered adviser
Registration
Exempt reporting adviser
Adviser of record
Cantos Ventures, LLC
CRD and SEC numbers
CRD 312922 · SEC 802-127828
Private fund gross assets
$339.9M
Office
San Francisco, CA
Latest Form ADV filing
March 27, 2026
Official record →
Stage focus
early
People on the record
Ian Rountree Founder and General Partner, Cantos
Public profiles
LinkedIn · X
Investment focus

Cantos is an early-stage venture firm that positions itself as a first-money-in partner for technically ambitious founders working to transform the physical world. The firm's stated focus spans sectors including energy, defense, infrastructure, space, and advanced manufacturing, with a deliberate appetite for underwriting high technical and regulatory risk at the earliest stages of company formation. The firm's portfolio reflects this orientation across a broad range of hard-technology and science-driven ventures. Companies such as Opus 12, Solugen, and Visolis point to a sustained interest in novel chemistry and materials. Dusty Robotics, ALICE Technologies, and Standard Cyborg suggest engagement with robotics and physical automation. SkyRyse and Interstellar indicate exposure to aerospace and next-generation aviation. Prellis Biologics extends the portfolio into advanced biological manufacturing. Arable and AgriData reflect attention to agricultural technology, while Stronghold and Patch signal interest in energy and climate infrastructure. Alongside these deep-technology bets, Cantos has also backed fintech and data infrastructure companies including Dharma Labs, Qwil, Ethic, and Shipamax, as well as health-focused ventures such as Helium Health and Ava, suggesting a founder-first orientation that occasionally follows exceptional technical teams across adjacent domains. Taken together, the portfolio reveals a firm that prioritizes scientific and engineering ambition, backs founders confronting complex regulatory and technical barriers, and seeks to engage at the earliest possible moment in a company's development.

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Permanent URL: https://mentionfox.com/investors/cantos
Last updated 2026-09-09
Cantos: venture fund vehicles on file. MentionFox, 2026-09-09. https://mentionfox.com/investors/cantos
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