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Proto-1 Manufacturing, L.l.c.

10 Tower Rd, Winneconne, WI 54986

ACTIVELAST SEEN IN FEDERAL DATA OCT 2026 · 5 SOURCES

Operating signal within 12 months from two or more independent sources.

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Homepage of Proto-1 Manufacturing, L.l.c.
Their homepage, crawled AUG 2026

What they make

All Other Industrial Machinery Manufacturing333248
  • tube forming machines
  • orbital flaring machines
  • custom machines
  • tube fabrication
  • contract machining
  • heat treat
  • engineering
  • ISO 9001

NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026

CAREERS
Careers page — seen SEP 8, 2026

CERTIFICATIONS — LISTED ON THE COMPANY’S WEBSITE

  • ISO 9001

Read from this company’s own website on August 9, 2026. Nobody at the facility has confirmed it here, and FactoryRegistry has not verified these — unlike operating status, which comes from independent public records. A certificate can lapse without the website changing, so ask the facility for current ones.

Where it is

44.10557, -88.72506 · CENSUS TIGER
COUNTY
METRO AREA
ON GOOGLE MAPS

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Every listed plant in Winnebago County

Also at this address

No other federal record shares this street address.

Where this record comes from

5 sources hold this plant, and 13 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.

  • The company’s own websiteOPERATING
    first seen JUL 2026 · last seen OCT 2026
  • SAM.gov entity registrationOPERATING
    Record NKKPZTUBW8W4 · first seen FEB 2026 · last seen OCT 2026
  • DOL Form 5500 retirement plan filingsOPERATING
    Record 391868411|WI|54986|10 tower rd · first seen DEC 2024 · last seen DEC 2024
  • SBA Paycheck Protection Program loan recordsEXISTENCE
    Record WI|winneconne|10 tower rd · first seen APR 2020 · last seen APR 2020
  • SBA 7(a) and 504 loan recordsEXISTENCE
    first seen APR 2013 · last seen JAN 2015

IN WINNEBAGO COUNTY3 other plants share this one’s industry (Industrial Machinery Manufacturing, NAICS 3332); 2 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
SAM.gov: PROTO-1 MANUFACTURING, L.L.C.
Street address
SAM.gov: 10 TOWER RD
City
SAM.gov: WINNECONNE
State
SAM.gov: WI
Coordinates
Census geocoder: 44.105570516817,-88.725062494456 · JUL 2026
Employees (band)
DOL: 20-99 · DEC 2024
Website
SAM.gov: http://www.proto1mfg.com/
Year established
Company website: 1997 · AUG 2026
CAGE code
SAM.gov: 5WAE7
Retirement plan filing (Form 5500)
DOL: 39 active participants, plan year ending 2024-12-31, 1 plan(s) · DEC 2024
PPP loan
SBA PPP: PPP loan x1, approved 2020-04-05, 70 jobs reported · APR 2020
SAM registration expires
SAM.gov: 2027-02-18
SBA loans
SBA: 504/7a loan x2, jobs 47.0 · APR 2013

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