| --- |
| pretty_name: Largest US layoff events since 1988 - WARN Act notices clustered by employer |
| license: cc-by-4.0 |
| language: |
| - en |
| task_categories: |
| - tabular-classification |
| tags: |
| - layoffs |
| - largest-layoffs |
| - biggest-layoffs |
| - layoff-events |
| - mass-layoffs |
| - warn-act |
| - warn-notices |
| - entity-resolution |
| - labor-market |
| - corporate-events |
| - public-records |
| - government-data |
| - alternative-data |
| - united-states |
| - daily-updated |
| - tabular |
| size_categories: |
| - 1K<n<10K |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: data/largest_layoff_events.csv |
| --- |
| |
| # The 1,000 largest US layoff events on record under the WARN Act, 1988-2026 |
|
|
| **Rebuilt 2026-09-12. Largest on file: United Airlines, 2020-07-01 to 2020-10-01 — 45,360 |
| workers across 25 notices in 14 state(s). The table's floor is |
| 835 workers; 558 of the 1,000 events span more than one notice and |
| 380 span more than one state.** |
|
|
| A state WARN portal lists one row per site per notice. "What was the biggest layoff?" is an |
| employer-level question, and answering it takes three steps no portal performs: 48 agencies' |
| notices normalized into one schema daily, an employer's many spellings resolved to one name |
| (Boeing files under 22 of them, typos included), and its rolling per-site notices clustered into |
| one event. This dataset is the result, top 1,000 by reported workers, rebuilt daily. |
|
|
|  |
|
|
| ## Read this before quoting a rank |
|
|
| * **Coverage is uneven before ~2020.** The archive reaches back to 1988 only for the states |
| whose portals kept history (Illinois and Oregon among them); most states begin between 2010 |
| and 2023. `states_covered_in_year` says how many states the archive holds for the event's |
| year — an early-year rank is a rank among the states we hold, not the country. |
| * **An event is one employer's notices with no gap longer than 45 days between consecutive |
| notice dates, and no longer than 183 days end to end.** A rolling programme is one event; |
| a later round, or the seventh month of a continuous programme, is a separate event. |
| * **`workers_reported` can overstate a rolling programme.** Exact duplicate rows (same state, |
| location, count, notice date and effective date) are dropped (`duplicates_dropped`), but successive |
| notices for the same site are summed because a portal does not say whether the second is |
| cumulative. `sites` is the conservative companion figure. |
| * **`single_notice=true` means the whole event is one portal row.** It is only as reliable as |
| that row; check it at the source before repeating it. |
| * Employer names are resolved by [`alias_merge.py`](https://github.com/APVentureEngine/warn-act-notices/blob/main/product/alias_merge.py) |
| (token signature + purity-guarded prefix absorption); the resolver ships in this repo. It |
| merges spellings, not corporate parents: subsidiaries filing under their own names are their |
| own employers. |
| * The current year is a running total; `event_open=true` marks events that may still grow. |
|
|
| ## Top 20 right now |
|
|
| | # | employer | period | workers | notices | states | |
| |---|---|---|---|---|---| |
| | 1 | United Airlines | 2020-07-01 to 2020-10-01 | 45,360 | 25 | CA;CO;FL;HI;IL;IN;MN;NJ;NV;NY;OH;PA;VA;WA | |
| | 2 | OS Restaurant | 2020-03-15 to 2020-05-15 | 38,688 | 128 | CA;FL;IN;KS;MD;MO;NC;NY;OH;PA;SC;TN | |
| | 3 | Northwest Airlines | 1998-08-11 to 1998-08-11 | 27,500 | 1 | OR | |
| | 4 | usi services group | 2020-03-01 to 2020-03-01 | 23,695 | 1 | NJ | |
| | 5 | United Airlines | 2002-12-30 to 2002-12-30 | 18,636 | 2 | IL | |
| | 6 | Walt Disney Parks and Resorts U.S | 2020-09-30 to 2020-11-18 | 17,780 | 19 | CA;FL | |
| | 7 | Tend Exchange Subsidiary LLC and Delaware Tender Staffing | 2025-05-20 to 2025-05-20 | 16,132 | 1 | CA | |
| | 8 | Delaware North | 2020-06-04 to 2020-07-28 | 14,210 | 32 | CA;CO;FL;MD;MI;MO;NY;OH;OK;SC;TN;VA;WI | |
| | 9 | David's Bridal | 2023-04-14 to 2023-08-11 | 12,964 | 78 | AK;AL;CA;CO;CT;GA;MA;ME;MN;MO;NC;NE;NJ;NM;NV;NY;OH;OR;TN;TX;WA;WI | |
| | 10 | Yellow | 2023-07-30 to 2023-08-18 | 12,146 | 73 | AL;AZ;CA;CO;DC;FL;ID;IL;IN;KS;ME;MI;MN;NC;ND;NM;NV;NY;OH;TX;VA;WA;WI | |
| | 11 | HMSHost | 2020-03-20 to 2020-08-18 | 12,080 | 78 | AK;CA;CO;DE;FL;HI;IL;MI;MO;NC;NJ;NV;NY;OH;OR;TN;WA | |
| | 12 | Ideal US Talent Systems Worker OpCo | 2026-05-04 to 2026-05-29 | 11,973 | 3 | GA;IL;RI | |
| | 13 | Cinemark | 2020-03-26 to 2020-04-17 | 11,297 | 140 | AZ;CA;CT;ID;IL;IN;KS;MD;MI;MT;NC;NV;NY;OH;PA;SC;TN;TX;UT;VA;WA;WI | |
| | 14 | Tesla | 2020-05-12 to 2020-05-12 | 11,239 | 2 | CA | |
| | 15 | Marriott Hotel Services | 2020-03-13 to 2020-06-11 | 10,853 | 32 | CA;CT;FL;NY;PA;TN;VA;WA | |
| | 16 | Great Atlantic and Pacific Tea | 2015-07-01 to 2015-11-12 | 10,039 | 102 | CT;NJ;PA | |
| | 17 | American Airlines | 2020-07-15 to 2020-07-29 | 10,013 | 15 | CA;CO;IL;NC;NY;OK;WA | |
| | 18 | Aramark | 2020-07-31 to 2020-11-18 | 9,977 | 50 | CA;CO;DC;DE;FL;IL;IN;MD;MI;MO;NJ;NV;NY;OH;OK;PA;TX;WA;WI | |
| | 19 | Hyatt Regency | 2020-03-21 to 2020-07-08 | 9,477 | 49 | CA;CO;DC;FL;HI;IL;MD;MN;NY;OH;OR;TX;VA;WI | |
| | 20 | Boeing | 2020-06-08 to 2020-10-19 | 8,783 | 12 | CA;WA | |
|
|
| ## Columns |
|
|
| | column | meaning | |
| |---|---| |
| | `rank` | position by `workers_reported` (ties: earlier start first) | |
| | `employer` | most frequent canonical spelling inside the event | |
| | `event_start`, `event_end`, `year` | first and last notice date; `year` is the start year | |
| | `workers_reported` | sum of `employees_affected` over the event's de-duplicated notices | |
| | `notices`, `notices_with_worker_count` | notices in the event; how many carried a count | |
| | `sites` | distinct state + location pairs | |
| | `states`, `states_count` | semicolon-separated state codes | |
| | `largest_single_notice`, `largest_notice_state`, `largest_notice_location` | the biggest single filing inside the event | |
| | `notice_types` | distinct raw `notice_type` strings, as the portals wrote them | |
| | `single_notice` | `true` when the event is a single filing | |
| | `event_open` | `true` when the last notice is within 45 days of the rebuild date | |
| | `duplicates_dropped` | exact duplicate portal rows removed before summing | |
| | `states_covered_in_year` | states with any notice in the archive for `year` | |
| | `employer_page` | the employer's history page on the site, when one exists | |
| | `notice_ids` | semicolon-separated ids joining to the flagship notices CSV | |
|
|
| ## Where the rows come from |
|
|
| The free, CC BY 4.0 [normalized WARN archive](https://huggingface.co/datasets/APProjects/us-warn-act-layoffs-notices-daily) rebuilt daily from 48 state portals |
| ([site](https://approjects-warn-act-notices.static.hf.space), [GitHub](https://github.com/APVentureEngine/warn-act-notices)). Related cuts of the same archive: [employers filing in |
| several states](https://huggingface.co/datasets/APProjects/us-multi-state-layoffs-employers-warn-act) and [layoffs per capita by state](https://huggingface.co/datasets/APProjects/us-layoffs-per-capita-by-state-warn-act). |
|
|
| Get told the day an employer on your list files, in any of the 48 states: [free 30-day |
| watch](https://approj.gumroad.com/l/warn-free-watch) (no card) or [WARN Watch, $49/year](https://approj.gumroad.com/l/warn-watch) for a list of up to 500 |
| employers. |
|
|
| *Automated publisher (APProjects). Not affiliated with any government agency. Verify critical |
| figures against the state source linked from each notice.* |
|
|
| <!-- warn-feed:offer:start --> |
| ## Use it, or keep watching it |
|
|
| This dataset is one cut of a single daily rebuild: **61,304 US WARN Act |
| layoff notices from 48 state agencies, 1988 to today**, one schema, no |
| login, no delay, CC BY 4.0. Snapshot as of **2026-09-13**; the files above are |
| rebuilt every day, so the live count is the truth. |
|
|
| **Look something up right now — free, no signup, nothing to install.** |
| [Check any employer or state against the last 180 days |
| →](https://approjects-warn-act-notices.static.hf.space/watch-now.html) It runs in your browser against these same files. |
|
|
| **Building something with it?** The same files are a free HTTP API — JSON and |
| CSV, no key, no signup, `access-control-allow-origin: *` so `fetch()` works from |
| a browser: [endpoints, schema and curl examples →](https://approjects-warn-act-notices.static.hf.space/api.html) |
|
|
| **Or have it watch a list for you.** Coming back to look is the part a CSV cannot |
| do. **WARN Watch — $49 for a year**, one payment, nothing auto-renews, 14-day |
| refund, no login: up to 500 employer names plus whole states, matched on every |
| daily refresh, delivered to a private alert page + calendar (.ics) + RSS + |
| an optional Slack / Discord / Teams webhook. Every alert carries that employer's |
| whole filing history from the archive, which a keyword rule on an RSS feed cannot |
| see. There is no built-in email — we do not claim one. |
|
|
| - [See a real alert page before paying](https://approjects-warn-act-notices.static.hf.space/watch-sample.html) · [what you get](https://approjects-warn-act-notices.static.hf.space/watch.html) |
| - [Try it free for 30 days, no card](https://approj.gumroad.com/l/warn-free-watch) · [Buy — $49/year](https://approj.gumroad.com/l/warn-watch) |
|
|
| **Reaching a human.** WARN Feed is published by APProjects, an automated data |
| publisher — that is stated plainly rather than dressed up. Corrections, coverage |
| gaps, schema questions and refund requests all go here and are read: |
| [open an issue](https://github.com/APVentureEngine/warn-act-notices/issues/new/choose). Payments are handled by Gumroad as merchant of |
| record, so an invoice can carry your company name. |
|
|
| [Source, scrapers and methodology](https://github.com/APVentureEngine/warn-act-notices) · [the 48-state site](https://approjects-warn-act-notices.static.hf.space/) |
| <!-- warn-feed:offer:end --> |
|
|
