Knowles Electronics LLC

What they make

Where it is

Other plants nearby

Facility	City	Industry	Status	Distance
MCMilplex Circuits INC	Itasca	Bare Printed Circuit Board Manufacturing 334412	◇ UNVERIFIED	1.3 KM
CWCircuit World INC	Itasca	Bare Printed Circuit Board Manufacturing 334412	◇ UNVERIFIED	1.3 KM
Xentris Wireless LLC	Addison	Other Electronic Component Manufacturing 334419	● ACTIVE	2.2 KM
SMS & M Group INC	Wood Dale	Printed Circuit Assembly (Electronic Assembly) Manufacturing 334418	● ACTIVE	3.9 KM
MCMicro Circuits INC	Addison	Bare Printed Circuit Board Manufacturing 334412	◇ UNVERIFIED	5.1 KM

Every listed plant in DuPage County

Also at this address

1 other record shares this street address. Separate filings can describe distinct businesses on one site, or the same plant recorded by different agencies, so every record is kept rather than merged away.

Where this record comes from

3 sources hold this plant, and 10 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

EPA cross-references this facility in ACES, BR, NPDES, RCRAINFO, TSCA · EPA site type STATIONARY.

• DOL Form 5500 retirement plan filingsOPERATING
  Records 901002689|IL|60143|1151 maplewood dr, 933466400|IL|60143|1151 maplewood dr · first seen DEC 2024 · last seen FEB 2025
• EPA Facility Registry ServiceEXISTENCE
  Record 110009378654 · first seen JUL 2014 · last seen JUL 2014
• EPA ECHO compliance recordsOPERATING
  first seen DEC 2006 · last seen DEC 2006

IN DUPAGE COUNTY54 other plants share this one’s industry (Semiconductor and Other Electronic Component Manufacturing, NAICS 3344); 25 of them have a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name

EPA: KNOWLES ELECTRONICS LLC · OCT 2026

Street address

EPA: 1151 MAPLEWOOD DRIVE · OCT 2026

City

EPA: ITASCA · OCT 2026

State

EPA: IL · OCT 2026

County (FIPS code)

EPA: 17043 · OCT 2026

Coordinates

EPA: 41.9698,-88.03119 · OCT 2026

Employees (band)

DOL: 500+ · FEB 2025

Retirement plan filing (Form 5500)

DOL: 388 active participants, plan year ending 2024-12-31, 1 plan(s) · DEC 2024

Hazardous waste generator (RCRA)

EPA ECHO: none · OCT 2026

State business registrationSOURCES DISAGREE

CO SOS: Knowles Electronics, LLC, registered with the Colorado Secretary of State; Corporation formed in Delaware; registered 2011-08-12; active, annual report filed 2026-05-27 · MAY 2026

CT SOTS: KNOWLES ELECTRONICS, LLC, registered with the Connecticut Secretary of the State; Limited liability company formed in Delaware; registered 2019-06-27; active, annual report filed 2026-01-14 · JAN 2026

TX Comptroller: KNOWLES ELECTRONICS, LLC, registered with the Texas Comptroller of Public Accounts; Limited liability company; registered 2005-07-15; active · JUL 2005