Substack is a privately held company owned by its founders, early employees, and a group of venture and community investors; no single person or fund is publicly known to hold a majority controlling stake.

Who owns Substack?

Substack Inc. was founded in 2017 by Chris Best, Hamish McKenzie, and Jairaj Sethi, who all retain equity as co‑founders. Because Substack is private and not listed on any stock exchange, it does not publish a detailed cap table, so exact percentages for each founder are not publicly available.

Beyond the founders, ownership is shared with employees through stock or options and with outside investors who funded the company’s growth. This mix means Substack’s “owners” are a group of stakeholders rather than a single corporate buyer or billionaire individual, despite occasional rumors to the contrary.

Major investors and stakes

Substack has raised multiple funding rounds from well‑known venture capital firms and a community round that let writers and readers buy small stakes. Notable investors include Andreessen Horowitz, BOND, The Chernin Group, and earlier backers via Y Combinator, all of whom own slices of the company but are not disclosed as majority owners.

Analyses of public funding data and valuation estimates suggest Andreessen Horowitz likely holds somewhere in the mid‑teens percentage range, making it a major but not controlling shareholder. Later rounds led by BOND and The Chernin Group, along with the 2023 community round, further diluted any single investor’s share, reinforcing that ownership is spread across multiple parties.

Is Substack owned by “billionaires”?

Online discussions sometimes claim that “billionaires own Substack,” usually pointing to venture firms like Andreessen Horowitz, whose founders are extremely wealthy. However, available information indicates that these firms are significant minority investors rather than outright owners, so describing Substack as solely “billionaire‑owned” oversimplifies a more distributed cap table.

Because Substack is a private corporation, only insiders see the exact breakdown, and outside observers can only infer ranges from funding rounds and valuations. For now, the most accurate public description is that Substack is privately owned by its founding team, employees, several venture funds, and a pool of small community shareholders.

Information gathered from public forums or data available on the internet and portrayed here.