DENNING INCORPORATED is a plumbing, heating, and air-conditioning contractors employer in ELMHURST, IL. Federal records show 1 OSHA inspection with 2 violations and $2,940 in penalties. All data sourced from public federal enforcement records.
Data sourced from OSHA, DOL WHD, MSHA, EPA ECHO, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA, and the UVA Corporate Prosecution Registry. Last updated: May 3, 2026.
DENNING INCORPORATED
1028 S. YORK ROAD, ELMHURST, IL, 60126
Parent: FIRST HORIZON CORP (108 locations)
238220 — Top companies in Plumbing, Heating, and Air-Conditioning Contractors
Industry Benchmark
Data Insights
Inspection Breakdown
Peer Comparison
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Inspection History
No inspection records found.
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Data aggregated from public federal enforcement and program records (OSHA, WHD, MSHA, EPA, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA) plus the UVA Corporate Prosecution Registry. Employer profiles matched by name and location — matching errors may occur. Risk scores computed by FastDOL, not official government assessments. OSHA citations typically appear 3-8 months after the inspection, so very recent enforcement actions may not yet be reflected. Data provided as-is. Report a data error.
Part of a larger organization
DENNING INCORPORATED is one of 108 establishments in our dataset that roll up under the parent organization FIRST HORIZON CORP. FIRST HORIZON CORP is a SEC public reporter (FHN-PC), with most recent reported revenue of $3.4B.
Federal enforcement records on DENNING INCORPORATED represent activity at this specific establishment. The full enforcement footprint of FIRST HORIZON CORP across all 108 of its tracked locations is viewable on the parent profile.
Other establishments operated by FIRST HORIZON CORP
- MARTIN & CO. EXCAVATING INC. — FORRESTON, IL — 2 federal records
- MARTIN & COMPANY EXCAVATING CORPORATION — ROCHELLE, IL — 2 federal records
- MARTIN AND COBEY CONSTRUCTION CO., INC. — ATHENS, AL — 2 federal records
- MARTIN & CO. EXCAVATING — OREGON, IL — 1 federal record
- MARTIN & ASSOC ENVIRONMENTAL LLC — KALAMAZOO, MI — 1 federal record
- MARTIN & MACARTHUR ENTERPRISES, LTD. — HONOLULU, HI — 1 federal record
- MARTIN AND RICARDO ROOFING — BUTLER, PA — 1 federal record
- MARTIN & RUSH MACHINING, INC. — TRINITY, NC — 1 federal record
- MARTIN & CO. EXCAVATING INC. — ROCKFORD, IL — 1 federal record
- MARTIN & ASSOCIATES ENVIRONMENTAL, L.L.C — KALAMAZOO, MI — 1 federal record
Other employers in Plumbing, Heating, and Air-Conditioning Contractors within IL
- UNIQUE PLUMBING CO., INC. — MAYWOOD — 3 federal records
- UNIQUE PLUMBING CO., INC. — COUNTRYSIDE — 3 federal records
- FOUR SEASONS HEATING & AIR CONDITIONING, INC. — CHICAGO — 3 federal records
- UNIQUE PLUMBING CO., INC. — BERWYN — 3 federal records
- M & M AFFORDABLE PLUMBING, INC. — ARLINGTON HTS — 2 federal records
- MONTEMAYOR CONSTRUCTION, INC. — HUNTLEY — 2 federal records
- MANHATTAN MECHANICAL SERVICES, LLC — BARTLETT — 2 federal records
- JONES LANG LASALLE AMERICAS, INC — WAUKEGAN — 2 federal records
- UNIQUE PLUMBING CO., INC. — WEST CHICAGO — 2 federal records
- HAIER PLUMBING AND HEATING, INC. — WOOD RIVER — 2 federal records
Industry context
Within the plumbing, heating, and air-conditioning contractors industry in IL, DENNING INCORPORATED ranks in the 72th percentile of OSHA violation frequency across 2,024 comparable establishments.
OSHA penalty totals rank in the 77th percentile of the same peer group.
The Bureau of Labor Statistics reports an industry-average Total Recordable Incident Rate (TRIR) of 3 for the plumbing, heating, and air-conditioning contractors sector, with a Days Away, Restricted, or Transferred (DART) rate of 1.7.
Activity timeline
No federal enforcement activity has been recorded against this establishment in the past 15 years.
Frequently Asked Questions
- What is DENNING INCORPORATED's OSHA violation history?
- DENNING INCORPORATED has 1 OSHA inspection on record with 2 violations and $2,940 in total penalties.
- How does DENNING INCORPORATED's safety record compare to its industry?
- DENNING INCORPORATED operates in the plumbing, heating, and air-conditioning contractors industry. The industry average Total Recordable Incident Rate (TRIR) is 3.
About this data
This profile aggregates federal enforcement records on DENNING INCORPORATED of ELMHURST, IL from 17 federal data sources. Records were found in 3 sources: OSHA workplace safety inspections, SEC XBRL companyfacts (parent financials), and BLS industry safety benchmarks. The remaining 14 sources were checked and found no matching records: WHD, MSHA, EPA, NLRB, OFLC, OFCCP, FMCSA, USAspending, SAM.gov, CMS, CPSC, NHTSA, UVA, SEC enforcement.
Establishments are matched across agencies using normalized employer name, state, and ZIP code. The dataset was last refreshed on May 3, 2026. DENNING INCORPORATED resolves to the parent rollup FIRST HORIZON CORP, which operates 108 establishments in our dataset.
This profile may be incomplete if DENNING INCORPORATEDoperates under multiple legal names, files under variations our entity-matching rules don't yet cover, or maintains records below current matching thresholds. To report a missing record or correction, email corrections@fastdol.com.