# Stephen Luczo

> Stephen Luczo is a seed investor backing Software and Information Technology. See 8 investments, round sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Location: Cupertino, United States
- Total investments: 8
- Last investment: Jul 2019
- Lead investor: 25%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/pub/stephen-luczo/9a/9/12

Stephen Luczo is a member of the Board of Directors at AT&T. He has also served as the Chairman of the Board, CEO, and President. Luzco joined us in October 1993 as Senior Vice President of Corporate Development. In September 1997, Luczo was promoted to the position of President and Chief Operating Officer of our predecessor, SeagateTechnology, Inc. and, in July 1998, he was promoted to Chief Executive Officer. Luczo resigned as our Chief Executive Officer, effective 3 July 2004, but retained his position as Chairman of the Board. In January 2009, Luczo was appointed President and CEO. Before joining us, Luczo was Senior Managing Director of the Global Technology Group of Bear, Stearns & Co. Inc., an investment banking firm, from February 1992 to October 1993.

## Contacts

5 contacts available for Stephen Luczo: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/stephen-j-luczo?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $2.8M–$3M |
| Series C | $26M–$35M |
| Series D | $31M–$36M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 4 | 50% |
| Information Technology | 3 | 38% |
| Big Data | 2 | 25% |
| Virtualization | 2 | 25% |
| Enterprise Software | 2 | 25% |

30 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 2 | 25% |
| Series C | 2 | 25% |
| Series D | 2 | 25% |
| Series A | 1 | 13% |
| Series B | 1 | 13% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 6 | 75% |
| Israel | 1 | 13% |

## Investments

| Company | Description | Round size | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| 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. | $7M | Series A | Jul 08, 2019 | https://www.drivenets.com/ |
| CloudPassage | CloudPassage® Halo® is the world’s leading agile security platform that provides instant visibility and continuous protection for servers in any combination of data centers, private clouds and public clouds. The Halo platform is delivered as a service, so it deploys in minutes and scales on-demand. Halo uses minimal system resources; so layeredsecurity can be deployed where it counts, right at every workload – servers, instances and containers. Leading enterprises like Citrix, Salesforce.com and Adobe use CloudPassage today to enhance their security and compliance posture, while at the same time enabling business agility. Headquartered in San Francisco, California, CloudPassage is backed by Benchmark Capital, Lightspeed Venture Partners, Meritech Capital Partners, Tenaya Capital, Shasta Ventures, Musea Ventures and other leading investors. | $35.9M | Series D | Aug 11, 2015 | https://www.cloudpassage.com |
| Relationship Science | Relationship Science (RelSci) is a technology solutions company that helps individuals and organizations leverage their relationships for a competitive business advantage. The RelSci platform provides deep information about over 6 million influential decision makers - who they are and who they know, what you have in common with them, and how youcan gain access to them and their organizations. Our relationship mapping tool empowers you to discover new relationships, advance existing ones, and maximize every opportunity. | $31M | Series D | Apr 16, 2015 | http://relationshipscience.com |
| PernixData | PernixData is fundamentally changing how storage is designed and operated in virtual data centers. The company’s flagship product, PernixData FVP software, virtualizes server side flash and RAM to enable scale-out storage performance that is independent of capacity. No changes are required to VMs, servers or primary storage, ensuring maximumperformance of all virtualized applications in a seamless, scalable and cost- effective manner. Based in San Jose, California, PernixData was founded by Poojan Kumar, a co-founder of Oracle Exadata, and Satyam Vaghani, VMware’s Storage CTO, creator of VMware's clustered file system (VMFS), and architect of several storage-related innovations at VMware over the last decade. PernixData is backed by Lightspeed Ventures, Kleiner Perkins and industry luminaries from enterprise software. | $35M | Series C | Aug 20, 2014 | http://pernixdata.com |
| Metabiota | Metabiota provides data, analytics, advice, and training to prepare for global health threats and mitigate their impacts. With a strategic global presence and sustained partnerships, Metabiota’s agile approach is helping the world track, transfer, and terminate the risk associated with epidemic threats. It was founded in 2008 and headquartered inSan Francisco, California. | $2.8M | Seed | Mar 20, 2014 | http://metabiota.com |
| CloudPassage | CloudPassage® Halo® is the world’s leading agile security platform that provides instant visibility and continuous protection for servers in any combination of data centers, private clouds and public clouds. The Halo platform is delivered as a service, so it deploys in minutes and scales on-demand. Halo uses minimal system resources; so layeredsecurity can be deployed where it counts, right at every workload – servers, instances and containers. Leading enterprises like Citrix, Salesforce.com and Adobe use CloudPassage today to enhance their security and compliance posture, while at the same time enabling business agility. Headquartered in San Francisco, California, CloudPassage is backed by Benchmark Capital, Lightspeed Venture Partners, Meritech Capital Partners, Tenaya Capital, Shasta Ventures, Musea Ventures and other leading investors. | $25.5M | Series C | Feb 13, 2014 | https://www.cloudpassage.com |
| DEY Storage Systems | DEY Storage Systems, Inc., provides innovative software defined storage solutions. Our software virtualizes storage by unbundling storage management from the physical layer, enabling customers to design and operate dynamic storage platforms supporting their services-based infrastructures. DEY is a global company based in San Mateo, CA. | $3M | Seed | Aug 12, 2012 | http://www.dey-sys.com |
| X-IO | X-IO is a storage industry related company delivering unmatched price or performance, reliability, and scale for enterprise, cloud applications, and infrastructure. Its “Intelligent Storage Element” systems are based on two decades of invention and investment by veteran storage industry experts.The features of X-IO’s plug-and-perform“Intelligent Storage Element” storage arrays are accelerate transactional, reporting and business intelligence applications by a factor of 3x or more; drives extreme performance and scale for virtual desktop and virtualized server infrastructures; and with five- to seven-year duty cycles, a super-efficient energy and space profile.X-IO solutions have been recognized as SQL Server Magazine and Windows IT Pro’s 2011 Editors’ Best Gold Medal winners, the 2012 Best of TechEd “Hardware and Storage Product” and “Attendees’ Pick” Awards, and inclusion in CRN’s 2012 Data Center 100 List. | $40M | Series B | Nov 28, 2007 | http://xiostorage.com |

8 of 8 investments shown.

## Co-investors
- [Benchmark](https://shizune.co/investors/profile/benchmark) — VC Fund, 2 deals together
- [Meritech Capital Partners](https://shizune.co/investors/profile/meritech-capital-partners) — VC Fund, 2 deals together
- [Shasta Ventures](https://shizune.co/investors/profile/shasta-ventures) — VC Fund, 2 deals together
- [Tenaya Capital](https://shizune.co/investors/profile/tenaya-capital) — VC Fund, 2 deals together
- [A-Grade Investments](https://shizune.co/investors/profile/a-grade-investments) — VC Fund, 1 deal together
- [C4 Ventures](https://shizune.co/investors/profile/c4-ventures) — VC Fund, 1 deal together

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- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Stephen Luczo invest in?

Stephen Luczo invests primarily in Software, Information Technology and Big Data startups, most often at Seed and Series C stage. Most of the 8 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What round sizes does Stephen Luczo invest in?

Stephen Luczo typically joins rounds of $2.8M–$3M at Seed, $26M–$35M at Series C and $31M–$36M at Series D. These are whole funding-round sizes, not Stephen Luczo's own check, which is rarely disclosed: the 10th–90th percentile of the confirmed public funding rounds Stephen Luczo took part in.

### How do I contact Stephen Luczo?

Public channels for Stephen Luczo 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 Stephen Luczo last invest?

The most recent investment recorded for Stephen Luczo closed in Jul 2019. Shizune tracks 8 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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