John Kiernan III
Managing Partner and CFO at Altimeter Capital
Boston, Massachusetts
John Kiernan III, Managing Partner and CFO at Altimeter Capital is an active investor based in Boston, Massachusetts. This profile covers what John Kiernan III backs, at which stage, and how founders can reach out in 2026.
Managing Partner and Chief Financial Officer at Altimeter Capital.
John Kiernan III invests in SaaS & Enterprise, Fintech and Developer Tools & Data, typically at Series B and Late Stage Venture.
- Investor type
- VCPE
- Stages
- Series BLate Stage Venture
- Invests in
- SaaS & EnterpriseFintechDeveloper Tools & Data
- Location
- Boston, Massachusetts
- Typical check
- $5M
How to reach John Kiernan III
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About this profile
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Round Funded. "John Kiernan III." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/john-kiernan-iii
Frequently Asked Questions
Who is John Kiernan III?
John Kiernan III, Managing Partner and CFO at Altimeter Capital is an active investor based in Boston, Massachusetts. John Kiernan III invests in SaaS & Enterprise, Fintech and Developer Tools & Data, typically at Series B and Late Stage Venture.
What does John Kiernan III invest in?
John Kiernan III invests in SaaS & Enterprise, Fintech and Developer Tools & Data, typically at Series B and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does John Kiernan III invest at?
John Kiernan III typically invests at Series B and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is John Kiernan III's typical check size?
John Kiernan III typically writes checks around $5M. 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.