Skip to content
oversight findingVerified

The US Department of Justice sues Microsoft for monopolisation

On 18 May 1998 the US Department of Justice, joined by states, filed US v. Microsoft, alleging monopolisation and tying of Internet Explorer to Windows. 2000 findings and 2001 settlement are later docket events. In the causal graph this event strengthens Digital-Platform Power Concentration, a driver that weakens Having a say in government — a worsening welfare path.

Sources: [1][2]

Read the full account

On 18 May 1998 the US Department of Justice, joined by states, filed US v. Microsoft, alleging monopolisation and tying of Internet Explorer to Windows. Gates was CEO.

Context

Neighbouring Windows 95 is the product. Neighbouring 2000 findings are later. He did not write the Sherman Act.

Windows 95 is neighbouring product. 2000 findings and 2001 settlement are later docket events.

Bill Gates was Microsoft CEO until January 2000, chairman until February 2014, then a technical adviser until 2020, and a Gates Foundation co-chair. That is not authorship of every Windows copy, every GAVI dose, or every IRS schedule. Melinda French Gates is a different person. Bill Clinton is PER-000772, a different person. A pledge is not a coverage rate. A docket is not a personality.

Why it matters

The path is antitrust-pressure-in-digital-markets: a completed DOJ complaint is an accountability instrument against OS-browser tying.

Who was responsible

Contribution type and responsibility level for each recorded actor — not sole-author shorthand.

  • Bill Gates

    Person

    Direct responsibility

    responsibility level 0.75 · verified

    He was CEO of the defendant. DOJ sued. States joined. Courts later sat. He did not sit as the judge.

What changed

Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.Reuters — US sues Microsoft for antitrust violationsReuters · High credibility · verified
  2. 2.US Department of Justice — United States v. Microsoft Corp., complaint 18 May 1998United States Department of Justice · High credibility · verified
What the sources establish

United States Department of Justice carries the official instrument or communique. Reuters records the same dated act independently.

Established: 18 May 1998 DOJ complaint in US v. Microsoft, independently reported.

Not established: that a breakup occurred that week, or a unique later consumer-price coefficient from the filing.

DOJ sued. States joined. Courts later sat. He did not sit as the judge.. A later repeal, court stay, or successor order would be a different Fact with a different date. That pair identifies The US Department of Justice sues Microsoft for monopolisation, not a later speech about The US Department of Justice sues Microsoft for monopolisation.

Co-authors and later implementers named in Context remain on the file. If a later repeal, stay, or successor instrument exists, it needs its own date and its own row. The contribution described on this Person row is limited to He was CEO of the defendant. DOJ sued. States joined. Courts later sat. He did not sit as the judge. That limit is the alternative to treating office-holding as authorship of every later series.

Causal path

How this event connects to drivers and indicators in the graph.

  1. ActorBill Gates
  2. contributed toFactThe US Department of Justice sues Microsoft for monopolisation
  3. strengthensDrivers (2)Digital-Platform Power Concentration
  4. weakensIndicatorHaving a say in government

Cite this page

Factrail. (2026). The US Department of Justice sues Microsoft for monopolisation. Factrail. https://factrail.ai/facts/us-v-microsoft-1998

https://factrail.ai/facts/us-v-microsoft-1998

Accessed 15 October 2026.

By the Factrail desk · Method: how we source and score · Last reviewed

Dispute this factNamed here, or represent someone who is? Request a right of reply.