Alden Rosario
Angel investor in Holliston
Holliston, Massachusetts
Alden Rosario, Angel investor in Holliston is an active investor based in Holliston, Massachusetts. This profile covers what Alden Rosario backs, at which stage, and how founders can reach out in 2026.
- Investor type
- Angel
- Stages
- Pre SeedSeed
- Invests in
- Consumer & Retail
- Location
- Holliston, Massachusetts
- Typical check
- $150K
- Past investments
- 11
Notable investments
Nightingale SecurityVahanOpenpriseDiesel LabsLambda School
Starsky RoboticsnToggleTiE Angels BostonTIE Boston AngelsHow to reach Alden Rosario
Angels and operators like Alden Rosario 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.
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About this profile
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Cite this page
Round Funded. "Alden Rosario." Round Funded investor database, updated September 24, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/alden-do-rosario
Frequently Asked Questions
What does Alden Rosario invest in?
Alden Rosario invests in Consumer & Retail, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Alden Rosario invest at?
Alden Rosario typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is Alden Rosario's typical check size?
Alden Rosario typically writes checks around $150K. 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.