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© 2026 Startup Intros, Inc.San Francisco, CA · Made for Founders

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/Jeff McDonald

§ Founder & Investor Profile

Jeff McDonald

ActiveFounder Investor

Updated:Apr 2, 2026

About News Experience Investments FAQs

Quick Facts

Role: Council Member, Cofounder
Company: X (formerly Twitter)
Status: Active
Type: Founder, Investor

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Recent News & Mentions

Mar 21, 2025FundingX - Other Equity Mar 1, 2025FundingX (formerly Twitter) - Series U Jun 9, 2022FundingX - Other Equity Dec 18, 2011FundingX - Other Equity Aug 1, 2011FundingX (formerly Twitter) - Series G Aug 1, 2011FundingX - Other Equity Dec 15, 2010FundingX - Other Equity Dec 1, 2010FundingX (formerly Twitter) - Series F Sep 25, 2009FundingX - Other Equity Sep 1, 2009FundingX (formerly Twitter) - Series D

Experience

Council Member, CofounderFounderCurrent

X (formerly Twitter)

Present - Present

Frequently Asked Questions

Who is Jeff McDonald?

Jeff McDonald is Council Member, Cofounder at X (formerly Twitter).

What companies has Jeff McDonald founded?

Jeff McDonald co-founded X (formerly Twitter).