Ben Horowitz

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Ben Horowitz built his career through two major reinventions. As a technology executive, he led Loudcloud through the dot-com collapse and remained CEO as the company sold its managed-services business and continued around its Opsware software. Hewlett-Packard acquired Opsware for approximately $1.6 billion in 2007.

Two years later, Horowitz and Marc Andreessen launched Andreessen Horowitz, where operator support became a defining part of the firm’s approach to founders.

His later career widened beyond investing. Horowitz became a management author, helped connect technology with cultural and business networks through the Cultural Leadership Fund, entered national political debate through public support and campaign contributions, and drew scrutiny over police philanthropy and a reported Justice Department inquiry involving a16z board seats.

A Quick Look at the Life of Ben Horowitz

Biography Summary

Benjamin Abraham Horowitz was born in London in June 1966 and raised in Berkeley, California. He studied computer science at Columbia University and UCLA before moving into Silicon Valley product and management roles at companies including Silicon Graphics, Lotus Development, Netscape, and AOL.

His most consequential operating chapter began with Loudcloud in 1999. After the dot-com collapse placed the company under intense financial pressure, Loudcloud sold its managed-services business to EDS and continued around its Opsware automation software. Hewlett-Packard acquired Opsware in 2007 for approximately $1.6 billion.

In 2009, Horowitz and Marc Andreessen launched Andreessen Horowitz, commonly known as a16z, with a $300 million first fund. Horowitz later published two management books and remained a cofounder and general partner as a16z reported more than $100 billion under management as of April 30, 2026.

Profile

Full Name: Benjamin Abraham Horowitz

Common Name: Ben Horowitz

Born: June 1966, London

Nationality: American

Education: B.A. in computer science, Columbia University, 1988; M.S. in computer science, UCLA, 1990

Best Known For: Cofounding Andreessen Horowitz and leading Loudcloud/Opsware as CEO

Company / Organization: Andreessen Horowitz (a16z)

Major Roles: Cofounder and general partner of a16z; former president and CEO of Loudcloud/Opsware

Books: The Hard Thing About Hard Things and What You Do Is Who You Are

From London to Berkeley

Horowitz was born in London in June 1966 and grew up in Berkeley, California. His mother, Elissa, worked as a nurse. His father, David Horowitz, was a writer and political activist whose public life moved from the New Left to prominent conservative activism.

Ben Horowitz attended Berkeley High School, where Fortune reported that he played football while also taking advanced mathematics courses. His early environment combined athletics, advanced coursework, Berkeley’s counterculture, and his father’s changing political circles.

While in college, Horowitz met Felicia Wiley, who later became his wife.

Computer Science and the Early Silicon Valley Years

Horowitz earned a bachelor’s degree in computer science from Columbia University in 1988 and an M.S. in computer science from UCLA in 1990. After graduate school, he moved into the Silicon Valley technology industry, working first at Silicon Graphics, then at an unsuccessful startup and Lotus Development.

In July 1995, he joined Netscape Communications. Company filings later identified him as a Netscape vice president, while Fortune reported that he began as a product manager. During that period, Horowitz and colleague David Weiden wrote “Good Product Manager, Bad Product Manager,” a management document that spread inside and beyond Netscape.

After Netscape, Horowitz moved to AOL. From April to September 1999, he served as vice president and general manager of AOL’s E-Commerce Platform division. That AOL chapter ended in September 1999, the same month Loudcloud was formed.

Loudcloud and the Dot-Com Crisis

Loudcloud was formed in September 1999 by Marc Andreessen, Ben Horowitz, Tim Howes, and In Sik Rhee, with Horowitz serving as president and CEO. The company expanded rapidly. Fortune later reported that it reached roughly 600 employees within 18 months.

That growth collided with the collapse of Internet demand. Loudcloud went public in March 2001, raising $150 million in an offering that had already been repriced downward. In May, the company announced that it would cut 122 employees, or 19% of its workforce, as it tried to conserve cash.

The pressure did not end with one round of layoffs. Fortune documented repeated financing strain, shrinking demand, and the possibility that Loudcloud could fail. For Horowitz, this period became the most important operating episode behind his later public focus on difficult management decisions and company survival.

Rebuilding Loudcloud as Opsware

The decisive change came in 2002. On August 15, Loudcloud sold its managed-services business to EDS for $63.5 million in cash. The agreement also included a separate software license and maintenance arrangement tied to the company’s Opsware technology.

Rather than ending the company, the transaction changed what remained. Loudcloud had developed proprietary automation software for use in its managed-services business and continued around that technology as Opsware. The shift required substantial workforce reductions and employee transfers to EDS, but it left Horowitz leading a software company instead of the original managed-services operation.

That transition became the defining corporate reinvention of his CEO career. It also became part of the operating experience behind his later focus on difficult management decisions and company survival.

The $1.6 Billion Sale to Hewlett-Packard

By 2007, the rebuilt company had reached another turning point. On July 20, Hewlett-Packard agreed to acquire Opsware for $14.25 per share, a transaction valued at approximately $1.6 billion.

HP completed the acquisition on September 21, 2007. Horowitz then became a vice president and general manager within HP Software, closing the chapter in which he had spent years as the operating leader of Loudcloud and Opsware.

Founding Andreessen Horowitz

In July 2009, Horowitz and Marc Andreessen launched Andreessen Horowitz with a $300 million first fund. The move shifted Horowitz from operating one company to investing in and advising founders.

The firm’s approach drew heavily on operator support. Fortune reported in 2014 that a16z had built a large organization around services such as recruiting for portfolio companies and noted that other venture firms were adopting similar practices. a16z later described this approach as its “platform model,” with operator teams spanning areas including talent, marketing, legal, and policy.

By 2026, the scale was far larger than at the firm’s start. a16z reported more than $100 billion under management as of April 30, 2026. In January, Reuters reported that the firm had raised more than $15 billion across five new funds.

Horowitz remained a cofounder and general partner as of September 11, 2026. His operating background remained central to a16z’s founder-support model.

Turning Operating Experience into Management Books

Horowitz’s advisory role also became public through writing. HarperCollins published The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers in March 2014. The book drew substantially on his operating experience and focused on the decisions leaders face when there are no easy answers.

In October 2019, HarperCollins published What You Do Is Who You Are: How to Create Your Business Culture. The second book shifted the emphasis toward the way leaders create and sustain organizational culture.

Together with his reputation as an adviser to startup CEOs, the books made management practice a durable part of Horowitz’s public identity, alongside venture investing.

The Cultural Leadership Fund and Broader Networks

Horowitz’s work also extended into efforts to connect technology with Black cultural and business networks. Fortune had reported on his support for programs and entrepreneurs aimed at increasing Black and Latino participation in technology before the creation of the Cultural Leadership Fund.

On August 22, 2018, Horowitz and Chris Lyons jointly announced a16z’s Cultural Leadership Fund. The launch described two goals: connecting cultural leaders with technology companies and helping more young African Americans enter the technology industry.

The announcement credited Lyons with raising the fund and described a structure in which fees and carry associated with it would be donated to nonprofit organizations supporting African Americans entering technology. Horowitz and Lyons announced the fund together in 2018; Lyons raised and led it.

Political Giving and a More Public Role

Horowitz’s later career brought him into more visible political debate. In July 2024, he and Andreessen publicly said they would support Donald Trump in the presidential election. Horowitz said, “I wish we didn’t have to pick a side,” while their stated policy concerns included startups, artificial intelligence, cryptocurrency, taxation, and U.S. technology competitiveness.

Federal Election Commission records show that Horowitz contributed $2.5 million to Right for America, a pro-Trump super PAC, on July 22, 2024. Later that year, Bloomberg Law reported from FEC data that he donated another $2.5 million to a super PAC supporting Kamala Harris.

The sequence drew mixed reactions. TechCrunch reported that some Black founders and investors it interviewed felt betrayed by his Trump support because of his previous role in Black technology networks, while others interviewed by the publication were unconcerned. His 2024 political activity does not fit neatly into a single partisan label: he publicly backed Trump while making major contributions to super PACs aligned with both Trump and Harris.

Las Vegas Police Philanthropy and Procurement Debate

Horowitz’s philanthropy in Las Vegas became another source of public scrutiny. In 2024, TechCrunch reported from more than 100 emails obtained through public-records requests that Horowitz had developed a close donor relationship with the Las Vegas Metropolitan Police Department, facilitated connections with several a16z portfolio companies, and donated at least $7.6 million to fund department purchases over several years.

Horowitz gave his own account in an a16z post that October. He wrote that he and his wife had donated approximately $6.3 million toward technology purchases from Skydio and Flock Safety, both a16z portfolio companies, as part of a public-safety effort.

Police-accountability, surveillance, and ethics advocates quoted by TechCrunch criticized the use of police-foundation donations, arguing that such arrangements can weaken ordinary procurement and transparency processes. Those criticisms were part of a public debate, not a criminal or regulatory finding against Horowitz.

In 2025, the Associated Press reported that Ben and Felicia Horowitz donated 10 modified Tesla Cybertrucks worth about $2.7 million for Las Vegas police use. The donation continued the broader debate over the influence private donors can have on public law-enforcement resources.

The Reported 2026 DOJ Inquiry

In August 2026, Reuters reported that the U.S. Department of Justice was investigating Andreessen Horowitz over potential conflicts involving firm partners serving on boards of competing AI-related companies. The reporting identified Horowitz’s Databricks board seat and fellow a16z partner Martin Casado’s Fivetran board seat as part of the inquiry.

Axios reported that the matter involved possible application of Section 8 of the Clayton Act, which addresses certain interlocking director relationships among competitors. As of September 11, 2026, the inquiry remained unresolved, with no reported charge, settlement, or adjudicated finding of a violation.

A reported investigation is not a finding of wrongdoing. As of September 11, 2026, no adjudicated antitrust violation by Horowitz or a16z had been established.

A Career Still in Motion

As of September 11, 2026, Horowitz remained a cofounder and general partner of a16z. His career had moved from product management to operating leadership, from crisis restructuring to a major corporate sale, and from running a technology company to helping build a venture firm that reported more than $100 billion under management by April 2026.

Across those roles, Horowitz’s public work repeatedly returned to operating under pressure, developing CEOs, building organizational culture, and connecting networks around technology. His later political giving, police philanthropy, and the reported DOJ inquiry also brought a wider level of public scrutiny.

Timeline

This timeline highlights major verified milestones in Ben Horowitz’s education, technology career, venture investing, writing, and later public activity.

Timeline.

June 1966

Benjamin Abraham Horowitz is born in London. He is later raised in Berkeley, California.

1988

Earns a B.A. in computer science from Columbia University.

1990

Earns an M.S. in computer science from UCLA.

July 1995

Begins his Netscape tenure, later serving as a vice president.

April–September 1999

Serves as vice president and general manager of AOL’s E-Commerce Platform division.

September 1999

Loudcloud is formed by Marc Andreessen, Ben Horowitz, Tim Howes, and In Sik Rhee. Horowitz serves as president and CEO.

March 2001

Loudcloud goes public and raises $150 million.

May 2001

Loudcloud announces layoffs of 122 employees, or 19% of its workforce.

August 15, 2002

The company sells its managed-services business to EDS for $63.5 million in cash and continues around its Opsware software.

July–September 2007

HP agrees to acquire Opsware for $14.25 per share, approximately $1.6 billion, and completes the acquisition in September.

July 2009

Horowitz and Marc Andreessen launch Andreessen Horowitz with a $300 million first fund.

March 4, 2014

The Hard Thing About Hard Things is published.

August 22, 2018

Horowitz and Chris Lyons announce the Cultural Leadership Fund.

October 29, 2019

What You Do Is Who You Are is published.

2024

Horowitz publicly supports Donald Trump and donates $2.5 million to a pro-Trump super PAC. Bloomberg Law later reports a separate $2.5 million donation to a pro-Harris super PAC. His Las Vegas police philanthropy also receives increased scrutiny.

2025

The Associated Press reports that Ben and Felicia Horowitz donated 10 modified Cybertrucks worth about $2.7 million for Las Vegas police use.

2026

a16z reports more than $100 billion under management as of April 30. Reuters and Axios later report a Justice Department inquiry involving a16z board-seat arrangements, including Horowitz’s Databricks directorship.

Interviews

TechCrunch Q&A on The Hard Thing About Hard Things

This 2014 Q&A accompanied the release of The Hard Thing About Hard Things. It gives readers a firsthand interview focused on the book and Horowitz’s management perspective.

View the interview

Ben Horowitz on Raising a New Fund and How Venture Firms Scale

This 2026 a16z conversation is framed around raising a new fund and how venture firms scale. It offers firsthand context for Horowitz’s later work at Andreessen Horowitz.

View the interview

Sources