Jack Dorsey
CEO & Co-Founder @ Block
San Francisco, United States
Jack Dorsey is a Series A investor at Block in San Francisco focused on Software and Apps. Jack Dorsey is the Co-Founder and CEO of Block, Inc. He previously worked at Elliott Investment Management as a CEO.
- Total investments:
- 41
- Last investment:
- Lead investor:
- 24%
Last updated:
For AI agents: llms.txt
Industries Jack Dorsey invests in
Stages Jack Dorsey invests in
Countries Jack Dorsey invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $1.1M–$13M
- Series A
- $1.4M–$24M
- Series C
- $17M–$80M
Investment Focus
Industry
- Software 9 (22%)
- Apps 6 (15%)
- Mobile 6 (15%)
- Financial Services 6 (15%)
- FinTech 5 (12%)
Stage
- Series A 12 (29%)
- Seed 9 (22%)
- Series C 5 (12%)
- Funding Round 4 (10%)
- Series B 3 (7%)
Country
- United States 25 (61%)
- United Kingdom 2 (5%)
- Japan 1 (2%)
- Colombia 1 (2%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Peek
|
Peek is an AI-enabled platform that supports online booking, payment processing, dynamic pricing, and guest management, while automating scheduling, waivers, communication, and analytics. With a marketplace at Peek.com, it offers travelers access to tens of thousands of curated experiences—everything from immersive exhibits and city tours toclasses and adventures. Through recent acquisitions of ACME Ticketing and Connect&GO, Peek now extends its infrastructure to include membership, donations, RFID-based visitor tracking, and on-site operations. Its clients include major institutions like MoMA, the Whitney Museum, Seattle Aquarium, Bryant Park, Looping Group, and Museum of Ice Cream. | $70M / Series D / Nov 20, 2025 | |
Mercor
|
Mercor is a better way to hire. We're an AI-powered platform that sources, vets, and pays your next employees. | $100M / Series B / Feb 20, 2025 | |
|
Mercor
|
Mercor is a better way to hire. We're an AI-powered platform that sources, vets, and pays your next employees. | $30M / Series A / Sep 19, 2024 | |
SimpleX Chat
|
SimpleX Chat is a decentralized secure chat and applications platform. SimpleX Chat was founded in 2021. | $1.3M / Pre-Seed / Aug 14, 2024 | |
Ocean
|
Ocean empowers miners to reclaim control of the intelligent portions of mining and is designed to be non-custodial, transparent, and permissionless. | $6.2M / Seed / Nov 27, 2023 | |
Matic
|
Matic is a technology startup that provides AI-powered indoor robots. | $24M / Series A / Nov 02, 2023 | |
Azteco
|
Azteco simplifies the process of obtaining Bitcoin so that anyone anywhere can understand and use it. The Azteco solution is a merchant platform where vendors can sell Bitcoin through a system of familiar and simple-to-use 16-digit voucher codes. Simple to use retail Bitcoin is the missing link to where it will sweep across the entire globe. It isthe final step that will onboard billions of people to global e-commerce, and Azteco addresses this market perfectly. | $6M / Seed / May 18, 2023 | |
Bluesky
|
Bluesky is a new social media platform. | $13M / Series A / Mar 01, 2023 | |
|
Bluesky
|
Bluesky is a new social media platform. | $13M / Seed / Mar 01, 2023 | |
Kyash
|
Kyash is a Japanese fintech startup offering consumer / business payment services. Kyash was founded on January 23, 2015, and is based in Tokyo, Japan. | $44.7M / Series D / Mar 17, 2022 | |
| See all 41 investments → | |||
Co-Investors
About Block
Block, Inc. (NYSE: SQ) (formerly Square, Inc.) is a technology company with a focus on financial services. Made up of Square, Cash App, TIDAL, and TBD, we build tools to help more people access the economy.
Block Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Alexander Statnikov
Head of Customer Lifecycle Automation and Data Platform
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Ariel David
Software Engineering Manager
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Arvin Aminpour
Software Engineer
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Carrie Peters
Principal / Lead Product Designer
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David Rusenko
Head of eCommerce
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FAQ
What does Jack Dorsey invest in?
Jack Dorsey invests primarily in Software, Apps and Mobile startups, most often at Series A and Seed stage. Most of the 41 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Jack Dorsey's check size?
Jack Dorsey typically joins rounds of $1.1M–$13M at Seed, $1.4M–$24M at Series A and $17M–$80M at Series C. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Jack Dorsey participates in.
How do I contact Jack Dorsey?
Public channels for Jack Dorsey include LinkedIn and X (Twitter). For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Jack Dorsey last invest?
The most recent investment recorded for Jack Dorsey closed in Nov 2025. Shizune tracks 41 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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