Employer · WARN Act history · Manufacturing
Thermal Structures
602 workers across 2 WARN notices, primarily in IN - recorded in the current PlainLayoffs dataset.
- 602
- Workers cut
- 2
- WARN notices
- 2
- States
- 301
- Avg / notice
Thermal Structures has 2 recorded WARN filings affecting 602 workers
According to WARN Act filings submitted to state workforce agencies, Thermal Structures has 2 recorded filings covering 602 workers across 2 states, primarily IN, the 289th-largest recorded WARN footprint among 7,009 tracked employers. WARN notices cover qualifying reported events, so this record is not a complete count of the employer's workforce changes.
Thermal Structures is a minor share of Manufacturing WARN activity — 0.3% of the sector's 211,445 workers across 776 employers, ranking #35 in Manufacturing.
Thermal Structures WARN workers by state
Sum of workers_affected on each filing row, grouped by the state agency that received the notice, not a corporate headcount by HQ state.
Thermal Structures city concentration · single-city dominant
Named cities on WARN filing rows only (city blank on a filing is omitted). Shares are of the city-tagged worker total, not every notice in the record.
74.3% of named-city WARN workers for Thermal Structures sit in Railroad Street Corona (447 of 602).
Lead city Railroad Street Corona · 74.3% · 2 named cities · top-3 share 100%
DOL WARN employer filing desk
Employer THERMAL-STRU · Thermal Structures 602 workers · 2 filings
NOTC-LIGHT · WORK-HEAVY · PHOTO-UNK · RUNWAY-UNK · STAT-MULTI · BOOK-DUAL · TYPE-CLOSE
- NOTC-LIGHT 2 filings
- WORK-HEAVY #289
- PHOTO-UNK No peer
- RUNWAY-UNK Runway n/a
- STAT-MULTI 2 states
- BOOK-DUAL 2 agencies
- TYPE-CLOSE 2 closures
Stamps derive from filed notice_date, effective_date, workers_affected, state agency source, and filing type in this dataset, not a prediction of future layoffs.
Largest Thermal Structures WARN filings · notice runway
Top 2 rows by workers_affected from this employer's filed notices. Runway = calendar days from notice_date to effective_date when both are published and forward-dated.
- Railroad Street Corona, CA · Closure · Manufacturing 447 workers · filed Sep 2, 2025 · 0d runway
- Plainfield, IN · Closure · Manufacturing 155 workers · filed Aug 25, 2025 · 0d runway
Median forward runway across 2 dated filings: 0 days (2 under 60d · 0 at/above 60d · 2 same-day or retroactive).
Where Thermal Structures Falls Among Tracked Employers
7,009 employers with a WARN filing, bucketed by total workers affected
Bucket counts (employers by total workers affected, as of September 2026): 1-10: 955; 11-50: 1,411; 51-150: 3,067; 151-500: 1,205; 501-1.5k: 273; 1.5k-5k: 72; 5k-15k: 16; 15k+: 10. Thermal Structures is in the 501-1.5k bucket (#289 of 7,009 by workers affected).
Employer Profile
- Primary State
- IN
- Primary Industry
- Manufacturing
- First Notice
- Aug 25, 2025
- Latest Notice
- Sep 2, 2025
Not all layoffs appear in WARN data, see our methodology for the federal + state coverage thresholds. Latest filing: Sep 2025.
WARN Notice History
2025
Railroad Street Corona, CA · Manufacturing
Effective: Sep 2, 2025
447
workers
Filed Sep 2, 2025
Plainfield, IN · Manufacturing
Effective: Aug 25, 2025
155
workers
Filed Aug 25, 2025
Questions about this Thermal Structures record
What is the largest Thermal Structures WARN filing on record? ▼
The largest row is the facility closure filed for Railroad Street Corona, CA on Sep 2, 2025, covering 447 workers in Manufacturing.
Where were Thermal Structures's WARN notices filed? ▼
The filings name Railroad Street Corona and Plainfield; together they form 2 facility-closure filings sourced from California EDD and Indiana DWD. States represented in this record: CA, IN.
Where is Thermal Structures's WARN footprint concentrated by city? ▼
74.3% of named-city WARN workers for Thermal Structures sit in Railroad Street Corona (447 of 602).
Does Thermal Structures's filing history show a recurring pattern? ▼
All 2 filings fall in 2025, so the record describes a concentrated episode rather than a multi-year cadence.
How much advance notice appears in Thermal Structures's record? ▼
No trustworthy advance-notice runway can be derived from these rows because the source dates are equal, missing, or retroactive.
See also: IN WARN filings · Manufacturing industry WARNs · WARN Act guide
Source: State WARN Act layoff registries Thermal Structures notice history aggregated from state workforce agency filings · September 2026 A WARN filing is a required notice, not a judgment of the employer's management or finances. Coverage follows states with structured public registries; this public-record summary is not legal advice, financial advice, or employment advice.
Every figure on PlainLayoffs is rendered directly from public WARN Act filings and state workforce agency records, no number is typed in by an editor. This employer's notice history is rendered directly from state WARN Act filings. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 2026. A WARN filing is a legally required notice, not a judgment of a company's management or financial health; rankings here reflect filed notice volume only.