Corporate Ownership
Who owns Substack?
Based on verified 2026 market intelligence, Substack operates as an independent company without a majority parent organization. Significant institutional investors and major shareholders include Andreessen Horowitz (a16z), TCG.
Institutional Investors & Major Shareholders
Significant asset management firms, investment funds, and equity stakeholders tracked via regulatory filings.
AN
Andreessen Horowitz (a16z)
Major Shareholder
Venture capital firm investing across technology, growth, biotech and crypto.
TC
TCG
Major Shareholder
Growth equity investor in sports, media and consumer platforms.
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Explore all relationships in Polaris7. See exactly how Substack connects to the rest of the market, including corporate ownership, technology integrations, and competitive peers.