Adam Altus, Partner at Sier Capital Partners is an active investor based in New York, New York. This profile covers what Adam Altus backs, at which stage, and how founders can reach out in 2026.
Partner at Sier Capital Partners.
Adam Altus typically invests at Late Stage Venture.
- Investor type
- PE
- Stages
- Late Stage Venture
- Location
- New York, New York
- Typical check
- $7M
How to reach Adam Altus
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Round Funded. "Adam Altus." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/adam-altus
Frequently Asked Questions
Who is Adam Altus?
Adam Altus, Partner at Sier Capital Partners is an active investor based in New York, New York. Adam Altus typically invests at Late Stage Venture.
What stage does Adam Altus invest at?
Adam Altus typically invests at Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Adam Altus's typical check size?
Adam Altus typically writes checks around $7M. 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.