Presidio Ventures
Presidio Ventures is the Silicon Valley venture-capital arm of Japan's Sumitomo Corporation. It is a generalist corporate investor in AI, mobility, energy, and enterprise software, not a water fund: (don't) Waste Water tracks one water-relevant bet, the lithium-from-brine company Lilac Solutions, across two deals. As of 2026 it rates Presidio's water commitment Occasional.
Compiled by Antoine Walter, (don't) Waste Water, from official filings and direct intelligence in Leviathan.
The take
Presidio Ventures is one of the older corporate venture arms in Silicon Valley, set up in 1998 as the investing outpost of Sumitomo Corporation, the centuries-old Japanese trading house. It invests off its parent's balance sheet rather than a fixed fund, which is how a single corporate investor ends up spread across AI, cybersecurity, mobility, robotics, energy, and enterprise software, and has touched more than 150 startups over its life.
Presidio Ventures is not a water investor, and a newcomer should not file it as one. Water reaches a trading-house corporate VC the way most things reach Sumitomo, through the supply chain: the parent moves the raw materials for the world's batteries, so Presidio's one water-relevant bet is really a battery-minerals bet that happens to clean up after itself. That single holding is Lilac Solutions, an Oakland company pulling lithium out of underground brine.
Presidio Ventures backed Lilac because its ion-exchange beads extract lithium from salty brine without the sprawling evaporation ponds the industry normally relies on, cutting both the land and the water footprint of a lithium mine. (don't) Waste Water counts that as Presidio's only water-relevant company, held across two funding rounds, the most recent in 2024, and rates the firm's water commitment Occasional. Sumitomo's mining and raw-materials network is the part Presidio brings that a pure-play venture fund cannot.
Presidio Ventures, for a water founder, is a long-shot and a specific one: a generalist corporate investor that has wandered into water exactly once, through the battery supply chain rather than treatment or infrastructure. The open question is whether lithium-from-brine stays a one-off or the first sign that Sumitomo's appetite for cleaner mineral extraction pulls Presidio back toward the water-mineral edge again.
Water Commitment Score
Compiled from official filings, third-party records, and direct intelligence from investors and founders, in Leviathan · recomputed monthly · as of Jun 2026.
How they invest
Portfolio · 1 water companies
Invests alongside
Highlighted = profiled on (don't) Waste Water.
Frequently asked
- What does Presidio Ventures invest in?
- Presidio Ventures is the generalist corporate venture arm of Sumitomo Corporation, backing startups in AI, cybersecurity, mobility, robotics, energy, and enterprise software. It is not a water specialist: the only water-relevant company (don't) Waste Water tracks is Lilac Solutions, a lithium-from-brine business, held across two deals.
- Is Presidio Ventures a water investor?
- No. Presidio Ventures has no water fund and no water thesis. Water reaches it through Sumitomo's battery and raw-materials supply chain, in the single holding Lilac Solutions, whose ion-exchange technology cuts the water footprint of lithium mining. (don't) Waste Water rates its water commitment Occasional.
- Who runs Presidio Ventures?
- Presidio Ventures is the Silicon Valley investing arm of Sumitomo Corporation, run from Santa Clara by a small team of Sumitomo investment professionals, including Senior Vice President Ross Leav and principals Yumi Yoshizawa and Kei Yoshida, with a separate European arm led by Managing Director Kuni Kawase.
- Where is Presidio Ventures based?
- Presidio Ventures is headquartered in Santa Clara, California, with additional United States offices and a European arm in London. Founded in 1998, it is one of the longer-running corporate venture arms in Silicon Valley and invests off the balance sheet of its parent, Sumitomo Corporation.
- Is Presidio Ventures the same as Presidio Bay Ventures?
- No. Presidio Ventures is Sumitomo Corporation's Silicon Valley venture-capital arm, based in Santa Clara. Presidio Bay Ventures is a separate San Francisco real-estate investment and development firm, and Presidio Investors is a different Austin private-equity firm. They share only the Presidio name.