Sema4 OpCo Layoffs & WARN Notices — 687 Workers Affected
All WARN Act mass layoff and plant closure notices filed by Sema4 OpCo.
Data updated
2
Total Notices
687
Workers Affected
1
States
2022
First Filing
2022
Latest Filing
Sema4 OpCo WARN Act Filings
| Company | Location | Employees | Notice Date | Type |
|---|---|---|---|---|
| Sema4 OpCo | Stamford, CT | 448 | ||
| Sema4 OpCo | Stamford, CT | 239 |
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Sema4 OpCo Layoff FAQ
Is Sema4 OpCo laying off in 2026?
Sema4 OpCo has no 2026 WARN notices on record. The most recent WARN Act filing was in 2022.
How many layoffs has Sema4 OpCo had?
Sema4 OpCo has filed 2 WARN Act notices affecting a total of 687 workers across 1 state.
When was Sema4 OpCo's most recent layoff?
Sema4 OpCo's most recent WARN Act filing was on 2022-01-01.
What states has Sema4 OpCo laid off workers in?
Sema4 OpCo has filed WARN Act notices in: Connecticut.
What is the WARN Act?
The Worker Adjustment and Retraining Notification (WARN) Act is a federal law that requires employers with 100 or more employees to provide 60 calendar days' advance notice of plant closings and mass layoffs.
How do I get notified about Sema4 OpCo layoffs?
Subscribe using the form above to receive free daily email alerts whenever new WARN Act notices are filed. You can also set up custom filters and webhooks with a paid API plan at warnfirehose.com/pricing.
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SEC Filings & Hiring Signals
Cross-dataset signals for Sema4 OpCo: SEC 8-K event filings and H-1B labor condition applications often move before and after WARN notices.
14 H-1B LCA petitions filed (FY2021–FY2026) — check H-1B layoff risk →
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