# Mark Long > Mark Long is a Series C investor at Prime Impact Capital backing Data Storage and Big Data. See 5 investments, check sizes, portfolio. Updated Aug 2026. - Type: Angel Investor - Fund: [Prime Impact Capital](https://shizune.co/investors/profile/prime-impact-capital) - Location: San Francisco, United States - Total investments: 5 - Last investment: Feb 2019 - Lead investor: 40% - Last updated: Aug 2026 - LinkedIn: https://www.linkedin.com/in/mark-long-b766a75/ Mark Long is a Series C investor at Prime Impact Capital in San Francisco focused on Data Storage and Big Data. Mark long is the Founder and Partner at Prime Impact Capital. Attended University of Michigan Law School. ## Investment focus ### Industry | Industry | Investments | Share | | --- | --- | --- | | Data Storage | 3 | 60% | | Big Data | 2 | 40% | | Software | 2 | 40% | | Analytics | 2 | 40% | | Flash Storage | 2 | 40% | 16 industries tracked in total. ### Stage | Stage | Investments | Share | | --- | --- | --- | | Series C | 2 | 40% | | Corporate Round | 2 | 40% | | Series E | 1 | 20% | ## Investments | Company | Description | Amount | Stage | Date | Website | | --- | --- | --- | --- | --- | --- | | Komprise | Komprise is the industry’s only multi-cloud data management-as-a-service that frees you to easily analyze, mobilize, and access the right file and object data across clouds without shackling your data to any vendor. It was founded in 2014 and headquartered in Campbell, California. | $24M | Series C | Feb 04, 2019 | | | Silk | Silk’s Cloud Data Platform optimizes everything about life in the cloud, allowing organizations to get ten times the performance out of their existing cloud data while spending 30% less. It fits neatly between your full application stack and cloud infrastructure, making your entire cloud environment run smarter without changing a thing. Withreal-time data reduction, thin provisioning, and continuous resource optimization, Silk automatically matches your cloud data spend to your actual data needs at every moment, so you can spend less and cloud more. | $25M | Corporate Round | Oct 10, 2018 | | | Elastifile | Elastifile is redefining the way data is stored and managed in the cloud and spanning hybrid clouds. Powered by an elastically scalable, enterprise-grade, distributed file system with integrated object tiering, Elastifile’s cross-cloud data fabric delivers high performance, unified access to global data. By freeing data from traditional storagesilos, Elastifile enables frictionless movement of applications to the cloud, between clouds, and across hybrid environments. This allows enterprises to seamlessly leverage cloud infrastructure and services to enhance and accelerate a broad range of data-driven workflows, including: analytics, DevOps, high-performance computing, and many more. | $16M | Series C | Sep 06, 2017 | | | Tegile Systems | Tegile Systems provides hybrid and all-flash storage arrays for a wide range of enterprise applications. The company flash storage arrays, with patented IntelliFlash architecture, deliver high I/O and low latency for business applications such as databases, server virtualization, and virtual desktops. Its customers achieve businessacceleration and unmatched storage capacity reduction.Tegile Systems' mission is to accelerate the transformation of enterprise IT by changing the performance and economics of enterprise storage. | $33M | Series E | Apr 11, 2017 | | | Excelero Storage | Founded in 2014 by a team of storage veterans and inspired by the Tech Giants’ shared-nothing architectures for web-scale applications, the company has created a Software-Defined Block Storage solution that meets performance and scalability requirements of the largest web-scale and enterprise applications.With Excelero’s NVMesh, customers canbuild distributed, high-performance Server SAN for mixed application workloads. Customers benefit from the performance of local flash, with the convenience of centralized storage while avoiding proprietary hardware lock-in and reducing the overall storage TCO. The solution has been deployed for hyper-scale Industrial IoT services, machine learning applications and massive-scale simulation visualization. | $5M | Corporate Round | | | 5 of 5 investments shown. ## Co-investors - [August Capital](https://shizune.co/investors/profile/august-capital) — VC Fund, 1 deal together - [Battery Ventures](https://shizune.co/investors/profile/battery-ventures) — VC Fund, 1 deal together - [Canaan Partners](https://shizune.co/investors/profile/canaan-partners) — VC Fund, 1 deal together - [Capricorn Investment Group](https://shizune.co/investors/profile/capricorn-investment-group) — VC Fund, 1 deal together - [Cisco Investments](https://shizune.co/investors/profile/cisco-investments) — VC Fund, 1 deal together - [CE Ventures (CEIIF)](https://shizune.co/investors/profile/creditease-israel-innovation-fund) — VC Fund, 1 deal together ## About Prime Impact Capital VC Fund 1 contacts available at Prime Impact Capital. | Name | Title | Profile | | --- | --- | --- | | Mark Long | Founder & Partner | https://shizune.co/investors/profile/mark-p-long | ## Similar investors ### Similar stage - [Sequoia Capital](https://shizune.co/investors/profile/sequoia-capital) — VC Fund - [New Enterprise Associates](https://shizune.co/investors/profile/new-enterprise-associates) — VC Fund - [Bessemer Venture Partners](https://shizune.co/investors/profile/bessemer-venture-partners) — VC Fund ## FAQ ### What does Mark Long invest in? Mark Long invests primarily in Data Storage, Big Data and Software startups, most often at Series C and Corporate Round stage. Most of the 5 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 Mark Long last invest? The most recent investment recorded for Mark Long closed in Feb 2019. Shizune tracks 5 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. # About Shizune Shizune.co is an investor database. 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