Who owns Substack? Ownership structure explained (2026)

Substack has become one of the most recognizable names in independent publishing. The platform lets writers, journalists, and creators run subscription-based newsletters — keeping the direct relationship with their audience and, in most cases, the majority of their revenue. With millions of active subscriptions and a growing roster of high-profile writers, Substack sits at the center of a broader shift away from ad-supported media toward creator-owned distribution.

That positioning makes ownership a particularly relevant question. Who controls the platform shapes decisions about content moderation, monetization strategy, and the balance of power between Substack and its writers. The company has raised over $185 million in venture funding, attracted some of Silicon Valley's most influential backers, and recently crossed the billion-dollar valuation threshold. Understanding who owns Substack — and how that ownership has evolved — gives you a clearer picture of where the platform is headed and whose interests are driving it.

Substack was founded in 2017 by Chris Best, Hamish McKenzie, and Jairaj Sethi. Best, who previously co-founded the messaging app Kik, serves as CEO. McKenzie handles much of the company's public communications, while Sethi leads the technical side as CTO. A fourth name, Nico Olivieri, appears as a co-founder in some data aggregators, though he is not widely recognized alongside the primary trio.

The company is headquartered in San Francisco, California. Its core product is a publishing platform where writers create and distribute email newsletters, podcasts, and — more recently — video content. Substack takes a 10% cut of paid subscription revenue, with payment processor Stripe taking an additional percentage. Writers keep the rest.

As of July 2025, Substack is valued at $1.1 billion. The platform has expanded beyond text-based newsletters into video, chat, and community features, and in early 2026 it launched a standalone Substack TV app for Apple TV and Google TV. Exact revenue and user figures are not publicly disclosed, but the company has described its growth trajectory as accelerating, particularly among writers earning six-figure incomes on the platform.

Substack is a privately held company. There is no publicly traded stock, no SEC filings to parse, and no quarterly earnings calls. That means ownership details are less transparent than they would be for a public company. Here's what is known.

Chris Best, Hamish McKenzie, and Jairaj Sethi all remain actively involved in the company. However, their individual equity stakes have never been publicly disclosed. As co-founders of a venture-backed startup, they likely hold significant common stock and/or stock options, but the exact percentages are unavailable.

Substack's investor base has grown through five known rounds of funding, totaling over $185 million in raised capital.

Andreessen Horowitz (a16z) is the most prominent backer, having led both the Series A and Series B rounds and participated in the Series C. The Chernin Group (TCG) has been involved since the seed stage and co-led the most recent round. BOND, the investment firm led by Mary Meeker's former colleague Mood Rowghani, co-led the Series C.

The Series A amount is slightly contested across sources, with figures ranging from $15.3 million to $15.45 million. Similarly, the community round amount varies between $5 million and $8 million depending on the source.

Beyond the institutional leads, several notable individuals participated in the Series C: Rich Paul (CEO of Klutch Sports Group) and Jens Grede (CEO of SKIMS). Their involvement signals Substack's growing appeal beyond traditional tech circles and into media, sports, and consumer brand ecosystems.

The 2018 seed round included Zhen Fund, a China-based venture capital firm. While foreign VC investment in U.S. tech platforms can occasionally attract scrutiny from the Committee on Foreign Investment in the United States (CFIUS), no active regulatory review of Substack has been publicly reported.

One unusual element of Substack's ownership is its 2023 community round via the Wefunder crowdfunding platform. This allowed writers and everyday users to invest at a valuation of roughly $585 million — notably lower than the $650 million Series B valuation from 2021. The round raised between $5 million and $8 million, a small slice of overall funding but a symbolic move that gave Substack's core user base a direct financial stake in the company's success.

As of mid-2026, Substack has not announced any plans for an IPO or direct listing. The $1.1 billion valuation and growing revenue base could make it an eventual candidate, but no concrete timeline has been disclosed.

Chris Best has served as CEO since co-founding Substack in 2017. Before Substack, he co-founded Kik, a messaging app that scaled to hundreds of millions of users — giving him deep experience in building consumer-facing platforms. Best sets the company's strategic direction, including its historically firm stance on minimal content moderation and its expansion beyond newsletters into multimedia.

Substack has not publicly designated a board chair. The board includes the founders alongside representatives from major investors. Andrew Chen of Andreessen Horowitz and Mood Rowghani of BOND are known board members, reflecting the influence of the company's two largest institutional backers.

Exact voting power percentages are not publicly disclosed. There is no public reporting confirming whether Substack uses a dual-class or multi-class share structure, which some founder-led tech companies adopt to retain voting control even as they raise outside capital. In practice, control appears to be shared among the founding team and the major venture backers — a16z, BOND, and The Chernin Group.

Substack's ownership story tracks the broader arc of the creator economy's rise. The company started small, accelerated during the pandemic-era newsletter boom, and recently crossed into unicorn territory.

The valuation dip between the 2021 Series B ($650M) and the 2023 community round ($585M) is worth noting. It reflects the broader correction in tech valuations during 2022–2023, when rising interest rates and a pullback in venture funding compressed multiples across the startup ecosystem. The rebound to $1.1 billion in the Series C suggests renewed investor confidence in Substack's growth trajectory.

In February 2026, Substack disclosed a data breach that had occurred in October 2025. The breach exposed internal metadata, email addresses, and phone numbers of users. The company stated the underlying vulnerability had been fixed and launched an internal investigation. For a platform built on direct writer-reader relationships, a breach of subscriber contact data carries particular reputational risk.

Substack has faced sustained criticism over its content moderation policies. The company has historically positioned itself as a defender of editorial freedom, taking a hands-off approach to what writers publish. That stance came under renewed pressure in February 2026, when a Guardian investigation reported that Substack was generating revenue from far-right and antisemitic newsletters. The report reignited backlash from users and civil rights organizations.

This tension sits at the heart of Substack's ownership question. The founders' philosophical commitment to minimal moderation — backed by investors who share that vision — directly shapes which content is allowed to exist and earn money on the platform. Any future change in ownership or governance could shift that balance.

For Substack's millions of writers and subscribers, ownership isn't an abstract question. The people who control the company determine how revenue is split, what content is permitted, how user data is handled, and whether the platform will eventually introduce advertising at scale — a shift that already began in late 2025.

Substack's venture backers have a financial incentive to grow the platform's revenue and push toward a liquidity event, whether that's an IPO, acquisition, or secondary sale. The founders, meanwhile, have built the company around a specific editorial philosophy. How long those two interests stay aligned will shape the platform's trajectory. And for the community investors who bought in through Wefunder, the question is whether Substack's growth can deliver returns before the next ownership chapter begins.

Chris Best is the CEO of Substack. He co-founded the company in 2017 and has led it since inception. Before Substack, Best co-founded the messaging app Kik.

No. Substack is a privately held company. Its shares are not listed on any public stock exchange. As of mid-2026, the company has not announced plans for an IPO.

Substack was founded in 2017 by Chris Best, Hamish McKenzie, and Jairaj Sethi. All three remain actively involved in the company. A fourth name, Nico Olivieri, appears in some databases but is not widely recognized as a co-founder.

The largest known institutional investors are Andreessen Horowitz (a16z), BOND, and The Chernin Group. Exact ownership percentages are not publicly disclosed. The three co-founders also hold equity, though their individual stakes are unknown.

Yes. In 2023, Substack ran a community investment round on the Wefunder crowdfunding platform, raising between $5 million and $8 million from writers and everyday users at a valuation of approximately $585 million.

As of July 2025, Substack is valued at $1.1 billion following its $100 million Series C funding round co-led by BOND and The Chernin Group.