Daniel Saul Sundheim
Founder & Chief Investment Officer @ D1 Capital Partners
New York, United States
Daniel Saul Sundheim is a Series E investor at D1 Capital Partners in New York focused on Software and Health Care. Daniel Saul Sundheim is the Founder and Chief Investment Officer of D1 Capital.
- Total investments:
- 47
- Last investment:
- Lead investor:
- 53%
Last updated:
For AI agents: llms.txt
Industries Daniel Saul Sundheim invests in
SoftwareHealth CareArtificial IntelligenceE-CommerceBiotechnology
Stages Daniel Saul Sundheim invests in
Series ESeries DSeries BSeries CSeries F
Countries Daniel Saul Sundheim invests in
United StatesBrazilIsraelMexicoEstonia
Investment Focus
Industry
- Software 6 (13%)
- Health Care 5 (11%)
- Artificial Intelligence 5 (11%)
- E-Commerce 4 (9%)
- Biotechnology 4 (9%)
Stage
- Series E 9 (19%)
- Series D 8 (17%)
- Series B 6 (13%)
- Series C 5 (11%)
- Series F 4 (9%)
Country
- United States 21 (45%)
- Brazil 1 (2%)
- Israel 1 (2%)
- Mexico 1 (2%)
- Estonia 1 (2%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Ramp
|
Ramp is a financial technology company that develops software for corporate spend management, finance operations, and business payments. The company provides an integrated platform that combines corporate cards, expense management, accounts payable automation, procurement, travel booking, reimbursements, treasury services, and accountingautomation. Its software is designed to help organizations manage business spending, streamline financial workflows, and centralize finance operations within a single system. The platform enables businesses to issue and manage corporate cards, process vendor payments, track expenses, handle employee reimbursements, and automate accounting processes. It also incorporates artificial intelligence capabilities that assist with receipt matching, transaction categorization, policy enforcement, approval workflows, and financial reporting. These features are intended to reduce manual administrative work and improve visibility into organizational spending. | $750M / Series F / Jun 04, 2026 | |
DriveNets
|
DriveNets is a fast-growing IP networking software company that revolutionizes Communications Service Provider (CSP) networks by disaggregating the network infrastructure from core to edge, similar to the way hyperscalers have disaggregated the cloud. DriveNets Network Cloud is an open distributed disaggregated networking solution based oncloud-native software and standard networking white boxes.The company was founded in 2016 by Ido Susan and Hillel. | $410M / Series D / Jun 01, 2026 | |
|
Ramp
|
Ramp is a financial technology company that develops software for corporate spend management, finance operations, and business payments. The company provides an integrated platform that combines corporate cards, expense management, accounts payable automation, procurement, travel booking, reimbursements, treasury services, and accountingautomation. Its software is designed to help organizations manage business spending, streamline financial workflows, and centralize finance operations within a single system. The platform enables businesses to issue and manage corporate cards, process vendor payments, track expenses, handle employee reimbursements, and automate accounting processes. It also incorporates artificial intelligence capabilities that assist with receipt matching, transaction categorization, policy enforcement, approval workflows, and financial reporting. These features are intended to reduce manual administrative work and improve visibility into organizational spending. | $300M / Nov 17, 2025 | |
Groq
|
Groq is a technology company that designs and provides specialized artificial intelligence compute solutions focused on accelerating AI inference workloads using its custom-built Language Processing Unit (LPU) hardware and associated software stack. The company’s core products include purpose-designed silicon and cloud-accessible platforms thatsupport real-time execution of large language models and other AI tasks with low latency and high throughput, enabling developers and enterprises to integrate AI services into production environments efficiently. Groq also delivers cloud-based services that allow customers to access inference capabilities via APIs compatible with popular development tools, supporting seamless integration into existing AI workflows. Its engineering efforts emphasise deterministic performance and streamlined deployment, targeting use cases where speed and cost predictability are critical. Groq engages with partners and customers across sectors that require rapid AI inferencing, and the company’s technology has attracted significant strategic interest and investment within the broader AI infrastructure ecosystem. | $750M / Series E / Sep 17, 2025 | |
The Interaction Company of California
|
Poke is an artificial intelligence assistant that functions as a single iMessage thread that links to files, calendars, and emails before acting. | $15M / Seed / Sep 08, 2025 | |
|
Ramp
|
Ramp is a financial technology company that develops software for corporate spend management, finance operations, and business payments. The company provides an integrated platform that combines corporate cards, expense management, accounts payable automation, procurement, travel booking, reimbursements, treasury services, and accountingautomation. Its software is designed to help organizations manage business spending, streamline financial workflows, and centralize finance operations within a single system. The platform enables businesses to issue and manage corporate cards, process vendor payments, track expenses, handle employee reimbursements, and automate accounting processes. It also incorporates artificial intelligence capabilities that assist with receipt matching, transaction categorization, policy enforcement, approval workflows, and financial reporting. These features are intended to reduce manual administrative work and improve visibility into organizational spending. | $500M / Series E / Jul 30, 2025 | |
|
Ramp
|
Ramp is a financial technology company that develops software for corporate spend management, finance operations, and business payments. The company provides an integrated platform that combines corporate cards, expense management, accounts payable automation, procurement, travel booking, reimbursements, treasury services, and accountingautomation. Its software is designed to help organizations manage business spending, streamline financial workflows, and centralize finance operations within a single system. The platform enables businesses to issue and manage corporate cards, process vendor payments, track expenses, handle employee reimbursements, and automate accounting processes. It also incorporates artificial intelligence capabilities that assist with receipt matching, transaction categorization, policy enforcement, approval workflows, and financial reporting. These features are intended to reduce manual administrative work and improve visibility into organizational spending. | $200M / Series E / Jun 14, 2025 | |
Imperative Care
|
Imperative Care focuses on developing a portfolio of innovative solutions to address the vast and urgent unmet needs in stroke care. It focuses on medical technology designed to expedite and improve the effectiveness of treatment, giving patients a chance for optimal recovery. | $150M / Series E / Jul 25, 2024 | |
ByHeart
|
ByHeart operates as a fully integrated infant nutrition company. It is dedicated to translating leading nutrition science and breastmilk research into evolved foods and formulas to support babies’ health and parents’ peace of mind. Its products strive to be next to nature made from hand-picked ingredients using small-batch blending and sit at theforefront of immune, microbiome, cognitive, and digestive health.The company was founded in 2016 and is headquartered in New York. | $95M / May 13, 2024 | |
|
ByHeart
|
ByHeart operates as a fully integrated infant nutrition company. It is dedicated to translating leading nutrition science and breastmilk research into evolved foods and formulas to support babies’ health and parents’ peace of mind. Its products strive to be next to nature made from hand-picked ingredients using small-batch blending and sit at theforefront of immune, microbiome, cognitive, and digestive health.The company was founded in 2016 and is headquartered in New York. | $95M / Series C / May 13, 2024 | |
| See all 47 investments → | |||
Co-Investors
About D1 Capital Partners
D1 Capital Partners is an investment firm that deploys capital in both public and private markets. It invests on behalf of investors globally, including endowments and foundations, family offices, sovereign wealth funds, outsourced CIOs, hospitals, and pensions. D1 has a fundamental and research-intensive investment strategy with a focus on mediumto long-term returns. Its research centers on the consumer, business services, financial services, healthcare, industrials, real estate and technology, media, and telecom sectors.
D1 Capital Partners Contacts
| Name | Phone | Socials | |
|---|---|---|---|
|
Daniel Saul Sundheim
Founder & Chief Investment Officer
|
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Emily Corning
Investor
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Jeremy Katz
President & COO
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Prateek Bhide
Investor
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Brett Levine
Investor
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FAQ
What does Daniel Saul Sundheim invest in?
Daniel Saul Sundheim invests primarily in Software, Health Care and Artificial Intelligence startups, most often at Series E and Series D stage. Most of the 47 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
When did Daniel Saul Sundheim last invest?
The most recent investment recorded for Daniel Saul Sundheim closed in Jun 2026. Shizune tracks 47 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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