Christian Sullivan
Co-Founder and Managing Director @ Republic capital
New York, United States
Christian Sullivan is a seed investor at Republic capital in New York focused on Blockchain and Software. Christian Sullivan is the Co-Founder and Managing Director of Republic Labs and an Advisor and Investor at Republic.Christian has invested in over 200 companies including the seed rounds of Cruise, Relativity Space, Yandex, Yubico, Ozon, and was an early check into investment funds Initialized Capital and Polychain. Christian started his careerin sales and trading in Moscow, Russia in the early 90s where he was a partner at United Financial Group which was later sold to Deutsche Bank in 2007.
- Total investments:
- 14
- Last investment:
- Lead investor:
- 36%
Last updated:
For AI agents: llms.txt
Industries Christian Sullivan invests in
Stages Christian Sullivan invests in
Countries Christian Sullivan invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $1.1M–$8.8M
- Series A
- $8.8M–$57M
Investment Focus
Industry
- Blockchain 3 (21%)
- Software 2 (14%)
- Cryptocurrency 2 (14%)
- Financial Services 2 (14%)
- Information Technology 2 (14%)
Stage
- Seed 7 (50%)
- Pre-Seed 2 (14%)
- Series A 2 (14%)
- Funding Round 1 (7%)
- Convertible Note 1 (7%)
Country
- United States 8 (57%)
- Canada 1 (7%)
- Germany 1 (7%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Reflex Aerospace builds and delivers tailor made satellite platforms. Reflex Aerospace offers manufacturing, assembly and integrations of satellites at competitive prices. | $57.4M / Series A / Nov 04, 2025 | ||
| Surge is a developer of a composable scaling meta-layer to push the bounds of Bitcoin functionality. The company's infrastructure supports app-specific rollups, GameFi, ordinals, and other DeFi use-cases while inheriting Bitcoin's security and liquidity, allowing developers to unlock Bitcoin innovation and focus on launching their ideas. | $1.8M / Pre-Seed / Oct 17, 2024 | ||
| Zebec is a continuous settlement protocol on Solana. Zebec is enabling the composable transfer of value starting with Stream Payroll. | $6M / Seed / Nov 10, 2021 | ||
| Portal is a financial services company that trades crypto anywhere without putting coins at risk, all from within a controllable wallet. Founded in 2018, Portal is headquartered in San Francisco, California. | $8.5M / Seed / Jun 01, 2021 | ||
| dClimate is the world's first transparent, decentralized marketplace where climate data, forecasts, and models are standardized, monetized, and distributed. The marketplace connects data publishers directly with data consumers, making climate data more accessible and reliable. When data providers share data and forecasts with the market it isautomatically scored for reliability, which helps consumers to shop for information. In exchange, dClimate creates a simple, direct-to-consumer distribution mechanism to monetize their work. | $3.5M / Seed / Apr 08, 2021 | ||
| dClimate is a decentralized climate data infrastructure and marketplace that standardizes, distributes, and makes climate data. | $3.5M / Seed / Apr 08, 2021 | ||
| Blackcart develops try-before-you-buy software for e-commerce merchants. Its proprietary try before you buy fraud ai empowers merchants to give their customers the confidence of in-store shopping, at home, and risk-free. | $8.8M / Series A / Jan 25, 2021 | ||
| Orthogonal Thinker is a biotech holding company, acquiring and accelerating companies engaged in DEA registered psilocybin, psychoactive compounds, clean label foods, and plant sciences. Empowering health, mental wellness and emotional intelligence through food, technology, and psychoactive compounds. | $6M / Seed / Apr 29, 2020 | ||
| Orthogonal Thinker is a biotech holding company, acquiring and accelerating companies engaged in DEA registered psilocybin, psychoactive compounds, clean label foods, and plant sciences. Empowering health, mental wellness and emotional intelligence through food, technology, and psychoactive compounds. | Convertible Note / Oct 01, 2019 | ||
| Nestor is a Skills-based talent management platform that helps HR and business leaders identify, activate, and strategically deploy skills within their organization to drive peak performance, innovation, and growth.With a market library of over 20,000 skills enhanced by Nestor’s AI skills suggestions, you gain unprecedented visibility into yourpeople’s capabilities and dynamic mapping of their skills. Our leading platform combines the tools, insights, and decision-making support you need to understand people’s strengths and skill gaps and leverage tailored learning recommendations to unlock hidden potential, in line with career and business goals.Nestor’s Talent and Opportunity Marketplace helps connect talent with gigs, projects, or new open roles based on AI smart-matching, ensuring people with the right skills are in the right place at the right time.Nestor is trusted by HR and people leaders in mid-to-large enterprises, including F500 companies, across the US, Latin America, Europe, and the Middle East. | Pre-Seed / Aug 30, 2018 | ||
| See all 14 investments → | |||
Co-Investors
About Republic capital
Republic Labs is a growth-stage investment advisory focused on profitability and resiliency. Republic Labs works with high net-worth individuals and family offices to syndicate investment opportunities. It was founded in
Republic capital Contacts
| Name | Phone | Socials | |
|---|---|---|---|
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Christian Sullivan
Co-Founder and Managing Director
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Julian Jung
Managing Director, Venture & Private Equity | Republic Labs
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Mo Islam
Investor
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FAQ
What does Christian Sullivan invest in?
Christian Sullivan invests primarily in Blockchain, Software and Cryptocurrency startups, most often at Seed and Pre-Seed stage. Most of the 14 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 Christian Sullivan's check size?
Christian Sullivan typically joins rounds of $1.1M–$8.8M at Seed and $8.8M–$57M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Christian Sullivan participates in.
How do I contact Christian Sullivan?
Public channels for Christian Sullivan include LinkedIn. 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 Christian Sullivan last invest?
The most recent investment recorded for Christian Sullivan closed in Nov 2025. Shizune tracks 14 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 Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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