| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2015-04-20 | AIT HOLDING CO LLC | Ultra Clean Holdings, Inc. | 1,903,752 | 6.0% | EDGAR |
| SC 13G/A | 2015-02-13 | Harvey Partners, LLC | ULTRA CLEAN HOLDINGS INC | 845,000 | 2.9% | EDGAR |
| SC 13G/A | 2015-02-04 | MARXE AUSTIN W & GREENHOUSE DAVID M | ULTRA CLEAN HOLDINGS INC | 0 | 0.0% | EDGAR |
| SC 13G/A | 2015-02-04 | AWM Investment Company, Inc. | ULTRA CLEAN HOLDINGS INC | 1,864,691 | 6.3% | EDGAR |
| SC 13G/A | 2015-01-30 | BlackRock Inc. | ULTRA CLEAN HOLDINGS INC | 1,830,761 | 6.2% | EDGAR |
| SC 13G/A | 2015-01-29 | ROYCE & ASSOCIATES LLC | ULTRA CLEAN HOLDINGS INC | 1,536,508 | 5.2% | EDGAR |
| SC 13G/A | 2015-01-21 | JPMORGAN CHASE & CO | ULTRA CLEAN HOLDINGS INC | - | - | EDGAR |
| SC 13G/A | 2014-02-14 | Harvey Partners, LLC | ULTRA CLEAN HOLDINGS INC | 1,582,500 | 5.5% | EDGAR |
| SC 13G/A | 2014-02-13 | MARXE AUSTIN W & GREENHOUSE DAVID M | ULTRA CLEAN HOLDINGS INC | 2,624,868 | 9.2% | EDGAR |
| SC 13G | 2014-02-04 | JPMORGAN CHASE & CO | ULTRA CLEAN HOLDINGS INC | - | - | EDGAR |
| SC 13G/A | 2014-01-31 | AIT HOLDING CO LLC | ULTRA CLEAN HOLDINGS INC | 2,968,244 | 10.4% | EDGAR |
| SC 13G/A | 2014-01-31 | BlackRock Inc. | ULTRA CLEAN HOLDINGS INC | 1,600,345 | 5.6% | EDGAR |
| SC 13G | 2013-11-01 | Harvey Partners, LLC | ULTRA CLEAN HOLDINGS INC | 1,446,000 | 5.1% | EDGAR |
| SC 13G/A | 2013-09-06 | ROYCE & ASSOCIATES LLC | ULTRA CLEAN HOLDINGS INC | 1,347,814 | 4.7% | EDGAR |
| SC 13G/A | 2013-02-13 | MARXE AUSTIN W & GREENHOUSE DAVID M | ULTRA CLEAN HOLDINGS INC | 2,640,275 | 9.5% | EDGAR |
| SC 13G | 2013-01-30 | BlackRock Inc. | ULTRA CLEAN HOLDINGS INC | 1,512,072 | 5.4% | EDGAR |
| SC 13G/A | 2013-01-24 | ROYCE & ASSOCIATES LLC | ULTRA CLEAN HOLDINGS INC | 2,506,475 | 9.0% | EDGAR |
| SC 13G/A | 2012-12-06 | BlackRock Inc. | ULTRA CLEAN HOLDINGS INC | 1,375,282 | 4.9% | EDGAR |
| SC 13G | 2012-07-13 | AIT HOLDING CO LLC | ULTRA CLEAN HOLDINGS INC | 4,500,000 | 16.2% | EDGAR |
| SC 13G/A | 2012-02-24 | MARXE AUSTIN W & GREENHOUSE DAVID M | ULTRA CLEAN HOLDINGS INC | 3,049,000 | 13.3% | EDGAR |