Who owns Ultra Clean (UCTT)?
138 holders named in SEC filings declare between 70.1% and 100.0% of Ultra Clean's shares outstanding, as of Sep 30, 2026. The largest are BlackRock (15.3%), Vanguard (11.1%) and Invesco (6.9%); the five largest hold 43.0% together. Another 306 institutions hold small positions worth 3.2%. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 20.6% and sold 17.8% of the shares, a net purchase of 2.8%; 135 opened a position, 88 added, 159 reduced and 30 sold out. Biggest buyers: Capital Group (+2.6M shares) and Invesco (+1.5M shares). Biggest sellers: FRONTIER CAPITAL MANAGEMENT CO.,LLC (-1.1M) and COOPER CREEK PARTNERS MANAGEMENT LLC (-586,773). Schedule 13D/G filings since Mar 31, 2026: Capital World Investors crossed 5% (5.7%) on Jun 30, 2026 and Invesco Ltd. raised its stake to 6.9% on Jun 30, 2026. Over time, 425 managers declared Ultra Clean in their 13F for Q2 2026, against 174 for Q4 2019: together at most 102.9% of the shares outstanding, against 86.5%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| BlackRock | 13F | 15.3% | Jun 30, 2026 | Q4 2019 or earlier |
| Vanguard | 13F | 11.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Invesco | 13F | 6.9% | Jun 30, 2026 | Q4 2019 or earlier |
| Capital Group | 13F | 5.7% | Jun 30, 2026 | Q2 2026 |
| State Street | 13F | 4.0% | Jun 30, 2026 | Q4 2019 or earlier |
| Boston Partners | 13F | 3.0% | Jun 30, 2026 | Q1 2026 |
| Geode Capital | 13F | 2.9% | Jun 30, 2026 | Q4 2019 or earlier |
| Driehaus Capital Management LLC | 13F | 2.9% | Jun 30, 2026 | Q3 2025 |
| Dimensional | 13F | 2.1% | Jun 30, 2026 | Q4 2019 or earlier |
| ALLIANCEBERNSTEIN L.P. | 13F | 1.8% | Jun 30, 2026 | Q4 2019 or earlier |
| Charles Schwab | 13F | 1.6% | Jun 30, 2026 | Q4 2019 or earlier |
| FRONTIER CAPITAL MANAGEMENT CO.,LLC | 13F | 1.5% | Jun 30, 2026 | Q4 2022 |
| ROYCE & ASSOCIATES LP | 13F | 1.5% | Jun 30, 2026 | Q4 2019 or earlier |
| OBERWEIS ASSET MANAGEMENT INC/ | 13F | 1.4% | Jun 30, 2026 | Q4 2019 or earlier |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 13F | 1.4% | Jun 30, 2026 | Q1 2026 |
| D. E. Shaw | 13F | 1.4% | Jun 30, 2026 | Q3 2024 |
| Two Sigma | 13F | 1.3% | Jun 30, 2026 | Q1 2026 |
| PARADIGM CAPITAL MANAGEMENT INC/NY | 13F | 1.3% | Jun 30, 2026 | Q4 2019 or earlier |
| Morgan Stanley | 13F | 1.2% | Jun 30, 2026 | Q4 2019 or earlier |
| Fuller & Thaler Asset Management, Inc. | 13F | 1.1% | Jun 30, 2026 | Q1 2025 |
| Northern Trust | 13F | 1.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Bank of America | 13F | 0.94% | Jun 30, 2026 | Q4 2019 or earlier |
| PINNACLE ASSOCIATES LTD | 13F | 0.88% | Jun 30, 2026 | Q4 2019 or earlier |
| UBS | 13F | 0.88% | Jun 30, 2026 | Q4 2019 or earlier |
| Millennium | 13F | 0.86% | Jun 30, 2026 | Q2 2024 |
Ultra Clean institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2019 | 174 | 86.5% | $822.0M | 60.4% |
| Q4 2020 | 214 | 87.3% | $1.1B | 58.0% |
| Q4 2021 | 267 | 83.7% | $2.2B | 52.0% |
| Q4 2022 | 211 | 88.0% | $1.3B | 55.3% |
| Q4 2023 | 194 | 89.9% | $1.4B | 53.9% |
| Q4 2024 | 230 | 92.2% | $1.5B | 53.4% |
| Q4 2025 | 231 | 92.2% | $1.1B | 46.7% |
| Q2 2026 | 425 | 102.9% | $6.6B | 51.6% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.