What companies did Jack Dorsey co-found?

Jack Dorsey co-founded two monumental technology companies: Twitter in 2006 (serving as CEO during two separate tenures) and Block Inc. (formerly Square) in 2009, which operates Cash App, Square POS, and Bitkey.

What is Start Small LLC?

Start Small LLC is Jack Dorsey's philanthropic fund established in April 2020. Dorsey transferred $1 Billion of his Square equity into the fund to finance COVID-19 relief, universal basic income trials, and girls' education, publishing every disbursement publicly in a real-time Google Sheet.

LLNI™ MODELVALUATION Q3 2026

RANK #33TechLast Verified: 2026-09-19United States • Age 49

Jack Dorsey Net Worth (2026)

Co-Founder, Block & Twitter (X) • Career Earnings, Compensation & Valuation Analysis

Estimated Net Worth (2026)

$7.70 Billion

+1.5% (24h)•Peak Valuation

Researched & Edited byGail Gardner Forbes Contributor•Catalog Added: Sept 1, 2026•Last Verified: 2026-09-19

Primary Benchmarks:SEC Form 4/10-K Filings, Corporate Venture Disclosures, Bloomberg & Forbes Benchmarks

Standards Methodology →

Executive Wealth Brief • Quick Answer

As of September 19, 2026

As of September 19, 2026, Jack Dorsey has an estimated net worth of $7.70 Billion. Their primary wealth drivers stem from foundational equity in Block Inc. Equity & Bitcoin Holdings, strategic capital appreciation, and an estimated cash-flow velocity of $98,000/hr.

Estimated Net Worth (Sept 19, 2026): $7.7B
24h Velocity: +1.5%
Wealth Rank: #33 (Tech)
Source Coverage: Strong (Public SEC & Filings)

Curated Editorial Biography & Career Trajectory

Career Milestones & Narrative

EDITORIAL PROFILE & DETAILS

Courier Logistics to Global Town Square (2000–2008)

Dispatch Routing to 140 Characters: Co-Founding Twitter

Jack Dorsey dropped out of NYU to pursue software engineering, inspired by dispatch routing systems used by couriers, taxis, and emergency vehicles. In 2006, while working at podcasting startup Odeo, Dorsey proposed an SMS-based dispatch messaging system that let users broadcast real-time status updates in 140 characters. Teaming with Biz Stone, Evan Williams, and Noah Glass, Dorsey posted the world's first tweet on March 21, 2006: 'just setting up my twttr.' Twitter evolved into the global digital town square for breaking news and civic discourse.

“You don't have to start with a grand vision. Start with something simple that works and let the community define what it becomes.”

Mobile Card Readers to Financial Super-App (2009–2021)

Building Block: Democratizing Mobile Payments & Cash App

In 2009, Dorsey co-founded Square (later renamed Block Inc.) with Jim McKelvey after McKelvey lost a glass-blowing sale because he couldn't accept credit cards. By inventing a tiny square card reader that plugged into smartphone headphone jacks, Block democratized credit card processing for millions of small merchants. Under Dorsey's dual-CEO leadership of both Twitter and Block, Block launched Cash App, which expanded into a dominant consumer financial ecosystem handling peer-to-peer transfers, direct deposits, and Bitcoin trading.

“Financial access is about human dignity. Enabling a small street vendor to accept payments on equal footing with a major corporation changes lives.”

Decentralized Social Protocols, Bitcoin & Philanthropy (2022–Present)

Start Small LLC, Open Protocols & $7.7B Standing

Dorsey stepped down as Twitter CEO in late 2021, clearing the way for its privatization, and committed to funding decentralized open protocols like Nostr and Bluesky. Through his philanthropic initiative Start Small LLC, Dorsey pledged $1 Billion (nearly 28% of his wealth at the time) toward pandemic relief, universal basic income trials, and girls' education, tracking every dollar publicly in an open spreadsheet. Reconciled at $7.7 Billion, his wealth is anchored in Block Inc. equity and Bitcoin treasury reserves.

“Open protocols outlast corporations. If we want a resilient internet, communication and money must be open public protocols, not proprietary walled gardens.”

Latest Documented Milestone (2026)Cash App ecosystem expansion and Bitcoin infrastructure push Dorsey fortune to $7.7B.

Venture Equity & Commercial Holdings

RESEARCH-BASED VALUATION

Venture / Commercial Asset	Period	Asset Class / Role	Gross Haul / Valuation	Net Payout / Royalties
Block Inc. (NYSE: SQ) Founder Common Equity	2009–Present	Block Head, Chair & Co-Founder (~43M Shares)	$40,000,000,000 Market Cap	~$5,775,000,000 Equity Stake
Start Small LLC Open Philanthropy Pledge	2020–Present	Founder & Sole Funder	$1,000,000,000 Initial Capital Commitment	Over $500M Publicly Disbursed
Twitter Sale & Privatization Proceeds	2022	Co-Founder & Former CEO	$44,000,000,000 Acquisition	Rolled ~$1B Equity into Private X Entity
Open Protocol Ecosystem Grants (Nostr & Open Money)	2022–Present	Lead Grantor & Sponsor	$50,000,000+ Direct Developer Grants	Funding Decentralized Protocol Rails

⚡ Documented via SEC Form 4 filings, secondary equity tender offers, and corporate venture disclosures.Status: Documented Evidence

Portfolio Allocation Breakdown

ESTIMATED LIQUIDITY

Core Enterprise Equity & Disclosed Stock Holdings

$5.8B75%

Venture Fund Portfolios & Secondary Stakes

$1.2B15%

Liquid Capital, Fixed Income & Real Estate

$770M10%

DATA GOVERNANCE STANDARD v2.0

Institutional Valuation & Evidence Details

ListTribe Estimated Net Worth Model Verified

$7.7B

Valuation Date: September 19, 2026•Research-Based Asset Model

Legacy Search ConsensusSyndicated Scrapers

$6.5B

Variance Delta: +15%

Primary Ground-Truth Verification:

Unlike syndicated scrapers that repeat unverified press releases, ListTribe grounds Jack Dorsey's valuation in documented primary filings, enterprise cap tables, and post-tax net retention.

ClassificationInstitutional Model

Primary SourceForbes 400 / Block Inc.

Valuation EngineDCF & Waterfall

Verification StandardMulti-Source Verified

ListTribe synthesizes publicly disclosed regulatory filings (SEC Form 4 and 10-K), trade guild minimum compensation schedules (SAG-AFTRA / WGA), box office receipts via Comscore/TMDB, and Pollstar live touring ledgers. Private enterprise holdings apply discounted cash flow (DCF) frameworks with industry-standard 20–30% private company illiquidity discounts.

⚡ Modeling: 45–50% federal/state tax haircut • 15–20% representation commission deductionRead full methodology

Frequently Asked Questions & Verification

Documented Questions & Financial Inquiries

EDITORIAL FAQ

As of September 2026, Jack Dorsey has an estimated net worth of $7.7 Billion according to ListTribe's verified valuation model. His net worth is derived primarily from his ~43 million common shares in payments and software giant Block Inc. (NYSE: SQ), private equity in X (formerly Twitter), and cold-storage Bitcoin holdings.