William Haemmerle
Partner, Transaction Advisory Services at Wiss
New York City, New York
William Haemmerle, Partner, Transaction Advisory Services at Wiss is an active investor based in New York City, New York. This profile covers what William Haemmerle backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCPE
- Stages
- Early Stage Venture
- Invests in
- Fintech
- Location
- New York City, New York
- Typical check
- $500K
- Past investments
- 5
Notable investments
How to reach William Haemmerle
Angels and operators like William Haemmerle reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
Reach active investors like this one
About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise. How this data is built.
Cite this page
Round Funded. "William Haemmerle." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/william-haemmerle
Frequently Asked Questions
What does William Haemmerle invest in?
William Haemmerle invests in Fintech, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does William Haemmerle invest at?
William Haemmerle typically invests at Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is William Haemmerle's typical check size?
William Haemmerle typically writes checks around $500K. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.