Facility	City	Industry	Status	Distance
Emergency Notification Systems LLC	Milwaukee	Other Communications Equipment Manufacturing 334290	ACTIVE	6.1 KM
Enforcement Technology Group INC	Milwaukee	Audio and Video Equipment Manufacturing 334310	LIKELY ACTIVE	6.4 KM
International Commerce & Marketing CORP.	Milwaukee	Other Metal Container Manufacturing 332439	ACTIVE	11.6 KM
Enforcement Technology Group INC	Milwaukee	Audio and Video Equipment Manufacturing 334310	ACTIVE	10.5 KM
Bad Wolf Technologies LLC	Mequon	Audio and Video Equipment Manufacturing 334310	ACTIVE	13.2 KM

Every listed plant in Milwaukee County

Also at this address

No other federal record shares this street address.

Where this record comes from

4 sources hold this plant, and 12 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.

SAM.gov entity registrationOPERATING
Record R6CKCSQH38E5 · first seen MAR 2026 · last seen OCT 2026
The company’s own websiteOPERATING
first seen AUG 2026 · last seen SEP 2026
DOL Form 5500 retirement plan filingsOPERATING
Records 391168275|WI|53212|4129 n port washington ave, 391168275|WI|53212|4129 n port washington rd · first seen JUN 2025 · last seen JUN 2025
SBA Paycheck Protection Program loan recordsEXISTENCE
Record WI|milwaukee|4129 n port washington ave · first seen APR 2020 · last seen APR 2020

IN MILWAUKEE COUNTY3 other plants share this one’s industry (Audio and Video Equipment Manufacturing, NAICS 3343); 1 of them has 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: SAM.gov: KOSS CORPORATION
Street address: SAM.gov: 4129 N PORT WASHINGTON RD
City: SAM.gov: MILWAUKEE
State: SAM.gov: WI
Coordinates: Census geocoder: 43.092288176303,-87.917207705912 · JUL 2026
Employees (band): DOL: 20-99 · JUN 2025
Website: SAM.gov: www.koss.com
CAGE code: SAM.gov: 50333
Retirement plan filing (Form 5500): DOL: 25 active participants, plan year ending 2025-06-30, 1 plan(s) · JUN 2025
PPP loan: SBA PPP: PPP loan x1, approved 2020-04-04, 32 jobs reported · APR 2020
SAM registration expires: SAM.gov: 2027-03-09
State business registration: TX Comptroller: KOSS CORP, registered with the Texas Comptroller of Public Accounts; Corporation; active

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