YC Spring 2026 (P26) founder

Jack Zumwalt

Founder of Kimpton AI, The IDE for Investors

Company

Jack Zumwalt is listed as a founder of Kimpton AI. In investment management, the final outcome isn't a deck or a memo. It's the trade. Kimpton is the AI-native research platform for portfolio managers. We're commoditizing the research layer and handing PMs data distilled into structured trades. The whole industry is fighting underperformance. Active managers trail their benchmarks, and capital keeps bleeding into passive. AI was supposed to fix that, but it hasn't. Funds either stitch together a dozen point tools or babysit general agents all day, and neither gets them to the trade. Kimpton goes straight to it. It ingests a fund's mandate, strategy, and positions. It runs them through our own harness and returns a structured trade proposal built for that fund. It connects to any institutional data source they already run on. And it's built to disagree, because consensus is poison for investment decisions. Instead of telling a PM what they want to hear, it surfaces the breaches and risks they'd otherwise miss. We're two ex-Goldman engineers and an ex-SpaceX engineer. We left to start our own quantitative systematic hedge fund. We raised $10M from a family office at 21 and 22, and scaled it to $35M over four years. We built Kimpton inside that fund, then productized the stack. We're live with our first institutional client, a $3.3B manager, and our first market is fundamental equity funds from $1B to $10B. Humans make the decisions. Kimpton does everything else.

Founder traction evidence

Public posts and activity attributed directly to this founder.

  1. LinkedIn

    Jack Zumwalt post about Kimpton AI

    Jack Zumwalt posted about the Y Combinator batch and Kimpton AI context.

  2. LinkedIn

    It was awesome to be included in the first YC Launch Live of the batch last week.

    It was awesome to be included in the first YC Launch Live of the batch last week. We demoed Kimpton AI (YC P26) trade proposals. With the context of a portfolio, a vault of internal research, firm-constructed Mandate.md and Strategy.md, we can deliver institutional-grade trades...

  3. X

    The @ycombinator batch is coming to a close. We are heading into investor week and Demo Day. I thought I'd share the unconventional beginnings of how @KimptonAI was created: @ortizmauricio_ and I met during our internship at @GoldmanSachs in 2019. I wrote algorithms to Show more

    The @ycombinator batch is coming to a close. We are heading into investor week and Demo Day. I thought I'd share the unconventional beginnings of how @KimptonAI was created: @ortizmauricio_ and I met during our internship at @GoldmanSachs in 2019. I wrote algorithms to Show more

  4. X

    YC demo day pitch for @KimptonAI The IDE for investors is going to be big

    YC demo day pitch for @KimptonAI The IDE for investors is going to be big

  5. X

    Over the last few weeks we have onboarded billions of dollars of AUM onto @KimptonAI . We're just as excited solving these problems as portfolio managers are using the platform. We think the old methodology of manual research is outdated, and it's time for a change! DMs are Show more Quote Y Combinator @ycombinator · May 28 .@KimptonAI is Cursor for portfolio managers - the AI-native terminal where agents do the research and propose the trades. Real-time institutional-quality data loaded into a harness designed for the financial markets, powering billions in AUM today. Congrats on the launch, 0:06 / 1:11

    Over the last few weeks we have onboarded billions of dollars of AUM onto @KimptonAI . We're just as excited solving these problems as portfolio managers are using the platform. We think the old methodology of manual research is outdated, and it's time for a change! DMs are...

  6. LinkedIn

    Today we moved Kimpton AI to consumption-based pricing for individuals and emerging managers.

    Today we moved Kimpton AI to consumption-based pricing for individuals and emerging managers. Seat-based software priced access. That worked when software just sat there waiting to be operated. Agents change it. The product is now research done on your behalf, and a quick price...

  7. X

    Demo day

    Demo day

  8. LinkedIn

    Commoditizing Research for Portfolio Managers with Kimpton AI | Jack Zumwalt posted on the topic | LinkedIn

    In investment management, the final outcome is not a deck, spreadsheet, or memo. It's the trade. At Kimpton AI we are commoditizing the research layer for all types of portfolio managers by giving them the ability to receive not only data, but data distilled into structured...