Registered entities
Ultra Clean Holdings, Inc.
Reg. No. 1275014United States
ULTRA CLEAN TECHNOLOGY SYSTEMS AND SERVICE, INC.
Reg. No. 943144654United States
CLEAN Co. s.r.o.
Reg. No. 05006732Czech Republic
J&E Holdings s.r.o.
Reg. No. 21091480Czech Republic
ULTRAWASH, s.r.o.
Reg. No. 06539009Czech Republic
Innovation
2 patent families — focus: Physics & computing; filing pace active. Cited 69 times.
| Year | Filings |
|---|---|
| 2024 | 1 |
Investor mix
1 investor on record.
| Investor type | Count | Share |
|---|---|---|
| Other / undisclosed | 1 | 100% |
Hiring activity
Hires periodically
17 roles tracked across 3 of the last 12 months
2 Aug 2026 · Sales Director · Tainan, Taiwan
1 Aug 2026 · Welder II · Philippines
1 Aug 2026 · Technician II · Singapore
31 Jul 2026 · Configuration Engineer · Indonesia
29 Jul 2026 · Engineer II-Welding Engineer PFA & Plastics Process · Penang, Malaysia
Based on job postings tracked across public sources.