# Jonathan Graff

> Jonathan Graff is a startup investor at Celtic House Venture Partners (Toronto). See 0 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Celtic House Venture Partners](https://shizune.co/investors/profile/celtic-house-venture-partners)
- Location: Toronto, Canada
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/jonathangraff

Jonathan Graff is a startup investor at Celtic House Venture Partners in Toronto. Jonathan Graff is the Advisor of Celtic House Venture Partners. Took up Master of Business Administration (MBA) at Ivey Business School at Western University.

## About Celtic House Venture Partners

VC Fund · Toronto, Canada

Celtic House Venture Partners is an independent Canadian investment firm.Since 1994, Celtic House has been one of Canada’s most active investors in technology and innovation. Capitalizing on the deep domain expertise of its partners, Celtic House has consistently provided superior financial returns to its investors. Celtic House has collaboratedwith management teams and repeat entrepreneurs to develop technology companies from the inception phase through to exit, generating 25 initial public offerings and successful acquisitions.Celtic House has collaborated with management teams and repeat entrepreneurs to develop technology companies from the inception phase through to exit, generating 25 initial public offerings and successful acquisitions.From offices in Toronto and Ottawa, Celtic House manages in excess of $425 million across three funds. Celtic House is currently making new investments out of Celtic House Venture Partners Fund IV, which closed in 2012.

5 contacts available at Celtic House Venture Partners.

| Name | Title | Profile |
| --- | --- | --- |
| Brian Antonen | Partner | https://shizune.co/investors/profile/brian-antonen-2 |
| David Adderley | Partner | https://shizune.co/investors/profile/david-adderley |
| David Beck | Partner | https://shizune.co/investors/profile/david-beck-2 |
| Jonathan Graff | Advisor | https://shizune.co/investors/profile/jonathan-graff |
| Julie Fallon | Chief Financial Officer | https://shizune.co/investors/profile/julie-fallon |

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