Marc Andreessen

Male

White

Coarse public-record coding; race is a noisy, interpretive category.

European American

Some profiles describe him as self-identifying with German-American heritage, but no specific, well-documented ancestry beyond "White American" was found in the sources reviewed, so this is coded at the coarse facet level only.

Descendant; no documented recent immigration in the family line.

not established

Not established in the sources reviewed.

English

Inferred from a US-born, English-speaking Midwestern family; not directly documented.

A stable, employed two-parent household in a small Wisconsin town. Both parents worked ordinary jobs (sales manager and a customer-service role), with no documented family wealth, elite network, or coastal connections behind him. This is the contrast with the comfortable, elite-private-school pipeline common among his Silicon Valley peers: a secure floor, but not a soft one, and nothing resembling a safety net of capital or standing if an early attempt had failed.

Paid student employment at NCSA, the university's federally funded supercomputing center, supported him while he and Eric Bina built Mosaic; once at Netscape he drew a salary and equity from a well-capitalized, Jim Clark-backed startup rather than self-funding from savings.

not established

No housing or income instability during the Mosaic or Netscape years is documented.

not established

No period of visible austerity, chosen or imposed, is documented.

Father, Lowell Andreessen, a sales manager for Pioneer Hi-Bred International, an agricultural seed company. Mother, Patricia, a customer-service representative for the mail-order retailer Lands' End.

Neither parent was self-employed.

Both parents are described as employees of established companies rather than self-employed.

not established

Not established in the sources reviewed.

1

A younger brother, Jeff, is named in biographical profiles.

not established

No custodial change is documented; raised by both parents throughout childhood.

New Lisbon, Wisconsin, a small rural village of roughly 2,000 people, with no technology industry presence of any kind nearby.

Public schools in New Lisbon, Wisconsin, through high school.

not established

Rural Wisconsin had no computing or technology industry within daily reach; this is the opposite of the Silicon Valley or Boston-corridor childhoods common among his later peers.

Born in Cedar Falls, Iowa; raised in New Lisbon, Wisconsin; moved to Urbana-Champaign, Illinois for college; moved to Mountain View, California in 1994 to commercialize Mosaic. An internal, career-driven sequence of moves, not an international migration.

Jim Clark, the Silicon Graphics founder, sought Andreessen out after reading about Mosaic and proposed commercializing it; he supplied the founding capital and the credibility to assemble a company around a 22-year-old with no business track record.

NCSA (National Center for Supercomputing Applications) at the University of Illinois, a federally funded research lab, where he held a paid student job and built Mosaic with Eric Bina.

Skill, Idea

NCSA supplied technical skill-building and the Mosaic project itself. It did not supply capital, business credibility, or an industry network; those came later, from Jim Clark.

Mosaic was built with Eric Bina at NCSA. Netscape was co-founded with Jim Clark, who met him through Clark's own search for a commercial browser opportunity.

21

Paid technical work began with his NCSA student job and two IBM internships while still an undergraduate.

2

IBM (internships) and NCSA, before co-founding Netscape rather than being hired into it.

B.S. in Computer Science, University of Illinois at Urbana-Champaign, December 1993.

not established

Not documented. In-state tuition at a public university was within reach of a middle-class dual-income household; no scholarship, military funding, or loan is mentioned in the sources reviewed.

Direct — public, in-state university to a federally funded research-lab job, with no transfer, military, or elite-prep detour.

The University of Illinois mattered less as a brand than as the host of NCSA, a federally funded supercomputing center doing early internet research; that lab, not the university's name, put him in a position to build Mosaic and later be found by Jim Clark.

Jim Clark personally provided the capital to found Mosaic Communications Corporation in April 1994, before the company (soon renamed Netscape) raised an institutional round with Kleiner Perkins.

It needed capital up front, before it earned anything.

Netscape went public in August 1995 before becoming profitable, an unusual move at the time.

Founding capital from Jim Clark personally, followed by an institutional round from Kleiner Perkins; the company went public in August 1995 at a closing-day market value of about $2.9 billion.

Jim Clark was not a passive check. As Netscape's co-founder and chairman, he supplied capital, operating credibility from Silicon Graphics, and the initial relationships that attracted further investors.

Netscape raised significant outside venture capital and went public within roughly 16 months of founding. Loudcloud and Opsware were also venture-backed and later sold outright (to AOL and HP, respectively). Andreessen Horowitz itself is a compounding vehicle built on limited partners' capital, not his own money; his personal wealth comes from general-partner economics and carry on that fund, plus his own portfolio holdings, not from the roughly $90 billion the firm manages on behalf of its investors.

Andreessen Horowitz, founded in 2009 with $300 million under management and grown to roughly $90 billion in assets under management as of early 2026, deploys outside limited-partner capital rather than his own; it is the structure behind most of his current wealth and influence, distinct from any single founding event.

Proceeds and reputation from Netscape's AOL sale and Opsware's HP sale were reinvested into founding Andreessen Horowitz in 2009 rather than being simply consumed.

Mosaic grew out of his own NCSA research-lab work rather than a prior employer's commission or a family business; Netscape's founding idea was to commercialize that existing project at Jim Clark's suggestion.

not established

No major failed venture before Netscape is documented; Mosaic and Netscape succeeded on close to the first attempt. A later venture, Ning (2004), underperformed relative to his other companies and sold for a comparatively modest $150 million in 2011, but this came well after his defining wealth event.

24

Age at Netscape's August 1995 IPO; born July 1971.

The first wave of commercial internet companies, before a dot-com bubble existed to compare it to; Netscape's IPO became the template investors later called a "Netscape moment."

Mountain View, California, where Mosaic Communications Corporation (soon Netscape) was founded in April 1994 after he relocated from Illinois.

Netscape's August 1995 IPO, where the stock opened at $28, traded as high as $75, and closed at $58.25 on its first day, putting Andreessen on the cover of Time at 24.

Built from scratch at each stage — Mosaic, Netscape, Loudcloud/Opsware, and Andreessen Horowitz — rather than acquiring an existing company or asset.

38

Age when Andreessen Horowitz was founded in July 2009; the structure behind most of his current wealth.

17

From a16z's 2009 founding through 2026, run without interruption.

not established

The opposite pattern applies — he moved directly into the Silicon Valley hub in 1994 and has built there since.

Venture capital; internet software (web browsers, enterprise infrastructure)

1900000000

Forbes real-time tracker figure, October 2, 2026. This is his personal net worth, built from Netscape and Opsware exit proceeds, his Andreessen Horowitz general-partner stake and carry, and personal portfolio holdings. It is NOT the same figure as a16z's roughly $90 billion in assets under management, which is limited-partner capital the firm deploys on investors' behalf, not his own wealth. Band figure only; no disclosed methodology.

Journalistic estimate

No single filing discloses a comprehensive personal net-worth figure; a16z is a private partnership.

2026

not established

General-partner income at a private partnership like a16z is not subject to proxy-statement-style disclosure; not established.

Almost entirely wealth rather than salary: proceeds from Netscape's 1999 AOL sale and Opsware's 2007 HP sale, plus general-partner carry and co-investment gains at Andreessen Horowitz since 2009.

Wrote the widely cited 2011 Wall Street Journal essay "Why Software Is Eating the World" and the 2023 "Techno-Optimist Manifesto." Held board seats at Meta/Facebook, Hewlett Packard Enterprise, and eBay (resigned 2014), and was named to the President's Council of Advisors on Science and Technology in 2026. Became a prominent and increasingly polarizing political commentator and donor after decades of backing Democratic candidates.

Uncapped

not established

No personal regulatory finding or consent decree against Andreessen is documented in the sources reviewed.

In April 2016, Facebook shareholders filed a derivative lawsuit alleging Andreessen, while serving as an independent Facebook board member, privately coached Mark Zuckerberg on messaging to defend a proposed non-voting share class later abandoned by the company. The allegation concerns a breach of fiduciary duty as a director; the sources reviewed do not establish a final adjudicated outcome.

Reported allegation, attributed to the shareholder complaint; not stated here as established fact.

not established

No ownership or dilution dispute among Netscape's, Opsware's, or a16z's own founders is documented in the sources reviewed.

After

The 2016 Facebook board allegation came roughly two decades after Netscape's IPO and seven years after a16z's founding.

Unrelated

A boardroom governance allegation at a portfolio-adjacent company; it did not produce his wealth or standing.

not established

Outcome of the 2016 shareholder complaint is not clearly established in the sources reviewed, so a gradient is not coded.

not established

Not established in the sources reviewed.

not established

Not established in the sources reviewed.

Visionary, Provocateur, prolific essayist, Techno optimist, polarizing political commentator

Press

4

Wikipedia, Forbes, a16z's own site, and Andreessen Horowitz's Wikipedia entry, among others reviewed.

Before

His reputation as a leading technologist and investor was established through Netscape and the a16z years, well before his post-2023 political turn.

Mixed

An asset for raising funds and attracting founders within tech and venture circles; increasingly a liability with segments of the broader public and political press.

The reputation was deliberately built, through books, press, and PR.

A long record of widely read essays, a manifesto, and heavy public and media presence reflects a deliberately built public-intellectual profile.

Within the technology and venture-capital industry, Andreessen is widely credited as a foundational figure, from Mosaic through a16z. Since publishing the 2023 "Techno-Optimist Manifesto" and shifting his political donations toward Donald Trump and Republican candidates in 2024, reporting describes a sharper split: continued standing among many investors and founders alongside a more polarized reception in broader political and media discourse, where he is alternately described as a visionary or as a divisive, hard-right-aligned figure. No personal-conduct allegations beyond the matters described elsewhere in this record are established.

not established

No reputational collapse-and-recovery event is documented; his standing has shifted politically rather than following a crisis-and-recovery arc.