Jonathan Kolber
General Partner @ Viola Growth
Kefar Shmaryahu, Israel
Jonathan Kolber is a seed investor at Viola Growth in Kefar Shmaryahu focused on Financial Services and FinTech. Jonathan is the Founder and CEO of Anfield Ltd. He previously worked at Viola Growth as a General Partner. Jonathan Kolber attended Harvard University.
- Total investments:
- 7
- Last investment:
- Lead investor:
- 29%
Last updated:
For AI agents: llms.txt
Industries Jonathan Kolber invests in
Stages Jonathan Kolber invests in
Countries Jonathan Kolber invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $6.2M–$6.3M
- Venture - Series Unknown
- $2M–$28M
Investment Focus
Industry
- Financial Services 3 (43%)
- FinTech 2 (29%)
- Health Care 2 (29%)
- Social Media 2 (29%)
- Video 1 (14%)
Stage
- Seed 2 (29%)
- Funding Round 2 (29%)
- Venture - Series Unknown 2 (29%)
- Series B 1 (14%)
Country
- Israel 4 (57%)
- United States 3 (43%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| SENAI is a startup platform specializing in Online Video Intelligence (OVINT), which analyzes unstructured online videos from social media to deliver real-time, geo-specific insights for security and intelligence applications. | $6.2M / Seed / Feb 04, 2026 | ||
| A secure platform for clarity and visibility across complex investment portfolios - Making it easy to follow the money | $6.3M / Seed / Oct 04, 2023 | ||
| A platform for institutional investors to invest in real estate backed bridge loans at scale with reduced risk. | $2M / Venture - Series Unknown / Dec 23, 2022 | ||
| Itamar Medical is a publicly traded medical device company based in Israel’s Caesarea Industrial Park that develops non-invasive medical devices using the proprietary PAT (Peripheral Arterial Tone) signal.Since its founding in 1997, the Company has engaged in research and development of non-invasive medical devices for diagnosis of variousmedical conditions, including cardiovascular disease and respiratory disorders.The first two product lines from Itamar Medical, based on unique technology developed by the Company, are the WatchPAT™ home appliance for respiratory sleep disorder diagnosis, and EndoPAT™, the only device approved by the FDA for testing endothelial (arterial) function and assessing the risk of coronary artery disease and other cardiovascular diseases. | $28.4M / Venture - Series Unknown / Aug 27, 2015 | ||
| EToro is a social trading and investment network that allows users to trade currencies, commodities, indices, crypto assets, and stocks. It is a multi-asset investment platform that empowers people to grow their knowledge and wealth as part of a global community. | $15M / Mar 12, 2012 | ||
| MacroCure is a biotechnology company focused on the development and commercialization of advanced cell therapy products. The company's first focus of interest is in the arena of wound care. The technology employs activated white blood cells obtained from young adults healthy donor blood. The activated cells provide the natural environment forwound healing, and ensure that necessary cell activities and factor secretions are maintained as required for wound healing. This novel concept is the first of its kind in the field of wound therapy. | $13M / Apr 01, 2011 | ||
| DG (NASDAQ: DGIT) is the intelligent advertising hub for the creation, management, distribution and optimization of multiscreen campaigns across broadcast and digital channels. A robust global solution for the world’s leading brands, DG is the leading company in the industry offering a complete end-to-end digital delivery workflow, combining dataaggregation and asset management within an adaptable technology core to deliver the most effective advertising.The pioneers of digital ad distribution, DG now boasts the largest global cross-channel advertising distribution network, including the world’s largest hybrid satellite and internet network dedicated to file based broadcast video delivery. Fueling campaign management across TV, online, mobile and beyond, DG empowers marketers to work faster, smarter and more competitively to engage consumers and maximize intelligent data driven advertising. DG’s trusted solutions encompass research and analytics, planning and buying tools, trading services, video and rich media production resources and content syndication across hybrid delivery systems. With New York as a center of operations, DG is a global company that connects over 14,000 advertisers and 7,400 agencies worldwide with their targeted audiences through an expansive network of over 50,000 media destinations across TV broadcast and digital advertising in 78 countries, managing approximately ten percent of the world’s media assets.For more information, visit http://www.dgit.com. | $30M / Series B / Mar 21, 2007 |
Co-Investors
About Viola Growth
Viola Growth is a technology growth capital fund that focuses on investing in Israeli-related global technology companies at their expansion phase.Founded in 2008, the fund invests in fast-growing, growth-stage companies, with potential for category leadership, substantial annual revenues, profitable unit economics, and a proven business model.Our average check size ranges from $15-$30M.The fund is managed by seven partners, one of whom is based in NY, who hold vast experience working with management teams, building organic and non-organic growth plans, scaling operations, creating business partnerships with global leaders, and driving profitable growth.Our team’s deep understanding of the ecosystem and extensive network of contacts allows us to track the most promising companies.Viola Growth manages three funds with a total of more than $725 AUM and has invested in more than 32 companies to date, with close to a dozen exits.
Viola Growth Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Ayal Shiran
General Partner
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Harel Beit-On
Founder & General Partner
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Natalie Refuah
General Partner
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Eran Westman
General Partner
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Jonathan Kolber
General Partner
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FAQ
What does Jonathan Kolber invest in?
Jonathan Kolber invests primarily in Financial Services, FinTech and Health Care startups, most often at Seed and Funding Round stage. Most of the 7 investments tracked by Shizune back companies in Israel. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Jonathan Kolber's check size?
Jonathan Kolber typically joins rounds of $6.2M–$6.3M at Seed and $2M–$28M at Venture - Series Unknown. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Jonathan Kolber participates in.
How do I contact Jonathan Kolber?
Public channels for Jonathan Kolber 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 Jonathan Kolber last invest?
The most recent investment recorded for Jonathan Kolber closed in Feb 2026. Shizune tracks 7 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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