A historical record of Bay Area workplaces for employers with more than 1,000 employees worldwide in at least one documented year. This is the company’s total workforce, not staff at each location.
By T. Udell · Research updated November 5, 2026

Explore a year1970

All recorded years

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Locations & employer presence · 1970Find a company

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Bay Area technology employersDrag to pan, including at the initial zoom. With the map focused, use arrow keys to pan, plus and minus to zoom, and Home to reset. Labeled bubbles represent documented locations or city-level employer presence; hollow bubbles indicate city-level presence. Use the company buttons below for sources. Approximate overlapping locations are separated with lines to their reference positions.

Loading locations…Modern geography · US Census 2024 · Drag to pan

Marker color / typeHQ HeadquartersBR BranchOF OfficeRD Research / developmentMF Manufacturing? Type not established

Employer scopeIndustry Show last-known locations City presence Estimated presence Last-known, unverified

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About the bubbles and this research sample

Who is included: employers with more than 1,000 worldwide employees in at least one sourced year and a documented Bay Area workplace. All records includes unresolved and outside-tech cases; use the scope and industry filters to narrow the sample.

Reading the map: bubbles show workplaces or approximate city presence, not employee totals. Hollow bubbles are city-level records; cluster numbers count distinct employers. Click a bubble for dated evidence and sources. The dashed rectangle marks the study extent, not complete coverage.

Gaps are not closures: supported presence intervals remain visible; short carry-forwards are labeled estimated. Older observations appear only with “Show last-known locations,” and remain unverified. Confirmed closures or departures suppress the affected locations. All recorded years combines observations from different dates.

Navigation: drag to pan; use +/− or Ctrl+scroll to zoom. Keyboard: arrows, +/− and Home. The timeline advances in five-year steps; Latest shows 2026. Roads and boundaries are US Census 2024 geography, not historical reconstructions. City positions remain approximate at every zoom.