Mars winds down the 90-year-old site after its 2025 Kellanova acquisition; 112 workers affected
September 4th, 2026: WARN notice filed for San Jose closureNew here? Follow stories to track developments over time. Create a free account to get updates when stories you care about change.
Overview
Updated 1 hour agoThe frozen waffle was invented on this San Jose factory floor. The plant that made Eggos for parts of nine decades will stop production in November.
Kellanova, the Eggo company owned by Mars since 2025, filed a notice on Sept. 4 that it will close the site at 475 Eggo Way on Nov. 4. The closure removes 112 jobs and extends a consolidation of Eggo production that began before the Mars deal.
Why it matters
112 workers lose jobs as Mars closes the San Jose plant that invented the frozen waffle, ending a 90-year production run.
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People Involved
Organizations Involved
The snack and frozen-foods company spun off from Kellogg in 2023 and bought by Mars in 2025; it makes Eggo, Pringles, Cheez-It and Pop-Tarts.
The family-owned candy and pet-food giant that paid about $35.9 billion for Kellanova in 2025.
Timeline
1930s September 2026
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WARN notice filed for San Jose closure
Latest Legal FilingEggo Company files notice to close the San Jose site; 112 workers affected, closure effective Nov. 4.
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Mars completes Kellanova purchase
AcquisitionMars closes its roughly $35.9 billion deal for Kellanova.
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Rossville, Tenn. Eggo plant to close
ClosureKellanova says the Rossville plant will close; 142 workers lose jobs.
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Kellogg splits into two companies
CorporateEggo moves to Kellanova; cereal business becomes WK Kellogg.
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Waffle shortage hits, San Jose keeps running
CrisisTwo of four Eggo plants shut; San Jose stays open and ramps up production.
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Kellogg buys Eggo
AcquisitionKellogg acquires the family company from the Dorsas.
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Frozen waffle debuts
MilestoneFrank Dorsa introduces the frozen waffle, invented at the San Jose plant.
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Dorsa family starts waffle business
OriginsBegan making waffle batter in San Jose.
Scenarios
San Jose Eggo plant closes as scheduled
Discussed by: California EDD WARN records; San Jose local media
Mars filed the required 60-day notice and shows no sign of reversing course. Barring a last-minute buyer or operational need, the plant ends production on Nov. 4, 2026. The 112 workers separate, and Eggo output shifts to Mars' remaining waffle facilities.
Closure delayed or partially reversed
Discussed by: Employment attorneys; local officials
A WARN notice is an intent to close, not a final decision. Worker groups or city officials could push for a reprieve, or Mars could slow the transition to manage supply. A delay would surface as a revised closure date in a new filing or company statement.
Site sold or repurposed after closure
Discussed by: San Jose planning officials; real estate observers
Once production stops, the 475 Eggo Way property becomes available. Its industrial zoning and location make redevelopment or a sale possible, but any deal would take months or years and would not restore waffle-making jobs.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
Eggo Crisis of 2009
Two of the four Eggo plants in the U.S. shut down, triggering a national waffle shortage. San Jose was one of the two plants still running, producing at top speed to meet demand while stores rationed supplies.
Empty freezer shelves for months; Kellogg said the shortage could linger into the next year.
Exposed how concentrated Eggo production was, with so few plants carrying national output.
Shows the San Jose plant's long role as a critical production site, and that Eggo manufacturing has been consolidating for years before Mars' move.
Hostess Brands liquidation (2012)
Hostess filed for bankruptcy and shuttered all its plants after a labor dispute, putting roughly 18,500 workers out of work. Iconic brands like Twinkies and Ho Hos disappeared from store shelves overnight.
The brands vanished for months, then were sold to new owners who restarted production at fewer plants.
Showed that iconic American food brands can survive their original factories, with new ownership and a smaller footprint.
A pattern for what happens when an iconic food brand changes hands: plants close, brands move to new owners, and production concentrates in fewer, larger sites.
Rossville, Tennessee Eggo plant closure (2024)
Kellanova announced its Eggo plant in Rossville, Tennessee would close permanently, laying off 142 workers between June and November 2024. The WARN notice cited permanent and total plant closure.
142 jobs lost; the local workforce development board took over retraining and placement.
Eggo production consolidated to fewer sites before Mars even completed its buyout of Kellanova.
The San Jose closure follows the same script, filed months after Kellanova shut another Eggo plant, showing a deliberate consolidation pattern.
