Renaissance Technologies (RenTech)'s UCTT Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC) currently holds 91,900 shares of Ultra Clean Holdings, Inc. (UCTT) worth $13.1 M, representing 0.02% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 49 quarters.
Based on 13F filings since 2013, Renaissance Technologies (RenTech) has maintained a long-term strategic position in UCTT, representing a significant commitment to this investment thesis. Largest addition occurred in Q4 2016, adding 497,100 shares. Largest reduction occurred in Q2 2014, reducing 449,082 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Ultra Clean Holdings (UCTT) Holding Value Over Time
Track share changes against reported price movement
Quarterly Ultra Clean Holdings (UCTT) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q2 2026 | +91,900 | New Buy | 91,900 | $142.59 |
| Q1 2026 | -106,400 | Sold Out | 0 | $0.00 |
| Q4 2025 | +16,900 | Add 18.88% | 106,400 | $25.33 |
| Q3 2025 | -167,700 | Reduce 65.20% | 89,500 | $27.25 |
| Q2 2025 | +197,400 | Add 330.10% | 257,200 | $22.57 |
| Q1 2025 | -102,689 | Reduce 63.20% | 59,800 | $21.41 |
| Q4 2024 | -35,400 | Reduce 17.89% | 162,489 | $35.95 |
| Q3 2024 | +78,789 | Add 66.15% | 197,889 | $39.93 |
| Q2 2024 | +20,700 | Add 21.04% | 119,100 | $49.00 |
| Q1 2024 | +28,500 | Add 40.77% | 98,400 | $45.93 |
| Q4 2023 | -48,400 | Reduce 40.91% | 69,900 | $34.13 |
| Q3 2023 | -40,900 | Reduce 25.69% | 118,300 | $29.67 |
| Q2 2023 | -108,300 | Reduce 40.49% | 159,200 | $0.04 |
| Q1 2023 | +95,800 | Add 55.79% | 267,500 | $0.03 |
| Q4 2022 | -40,200 | Reduce 18.97% | 171,700 | $0.03 |
| Q3 2022 | +151,100 | Add 248.52% | 211,900 | $25.75 |
| Q2 2022 | -56,100 | Reduce 47.99% | 60,800 | $29.77 |
| Q1 2022 | +19,000 | Add 19.41% | 116,900 | $42.39 |
| Q4 2021 | -74,700 | Reduce 43.28% | 97,900 | $57.36 |
| Q3 2021 | +125,400 | Add 265.68% | 172,600 | $42.60 |
| Q2 2021 | +47,200 | New Buy | 47,200 | $53.73 |
| Q1 2021 | -61,900 | Sold Out | 0 | $0.00 |
| Q4 2020 | +61,900 | New Buy | 61,900 | $31.15 |
| Q3 2020 | -46,200 | Sold Out | 0 | $0.00 |
| Q2 2020 | -9,200 | Reduce 16.61% | 46,200 | $22.64 |
| Q1 2020 | +55,400 | New Buy | 55,400 | $13.81 |
| Q4 2019 | -24,300 | Sold Out | 0 | $0.00 |
| Q3 2019 | -185,200 | Reduce 88.40% | 24,300 | $14.65 |
| Q2 2019 | -116,237 | Reduce 35.68% | 209,500 | $13.92 |
| Q1 2019 | -210,518 | Reduce 39.26% | 325,737 | $10.35 |
| Q4 2018 | +320,755 | Add 148.84% | 536,255 | $8.47 |
| Q3 2018 | +215,500 | New Buy | 215,500 | $12.55 |
| Q4 2017 | -215,900 | Sold Out | 0 | $0.00 |
| Q3 2017 | -364,700 | Reduce 62.81% | 215,900 | $30.62 |
| Q2 2017 | -136,100 | Reduce 18.99% | 580,600 | $18.75 |
| Q1 2017 | -46,800 | Reduce 6.13% | 716,700 | $16.87 |
| Q4 2016 | +497,100 | Add 186.60% | 763,500 | $9.70 |
| Q3 2016 | +66,134 | Add 33.02% | 266,400 | $7.41 |
| Q2 2016 | -90,134 | Reduce 31.04% | 200,266 | $5.69 |
| Q1 2016 | -10,500 | Reduce 3.49% | 290,400 | $5.36 |
| Q4 2015 | +130,200 | Add 76.27% | 300,900 | $5.12 |
| Q3 2015 | +41,300 | Add 31.92% | 170,700 | $5.74 |
| Q2 2015 | +82,800 | Add 177.68% | 129,400 | $6.23 |
| Q1 2015 | +46,600 | New Buy | 46,600 | $7.15 |
| Q2 2014 | -449,082 | Sold Out | 0 | $0.00 |
| Q1 2014 | +274,882 | Add 157.80% | 449,082 | $13.15 |
| Q4 2013 | +83,790 | Add 92.68% | 174,200 | $10.03 |
| Q3 2013 | +16,706 | Add 22.67% | 90,410 | $6.91 |
| Q2 2013 | +73,704 | Add 0.00% | 73,704 | $6.05 |
Renaissance Technologies (RenTech)'s Ultra Clean Holdings Investment FAQs
Renaissance Technologies (RenTech) first purchased Ultra Clean Holdings, Inc. (UCTT) in Q2 2013, acquiring 73,704 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Renaissance Technologies (RenTech) has held Ultra Clean Holdings, Inc. (UCTT) for 49 quarters since Q2 2013.
Renaissance Technologies (RenTech)'s largest addition to Ultra Clean Holdings, Inc. (UCTT) was in Q4 2016, adding 763,500 shares worth $7.41 M.
According to the latest 13F filing for Q2 2026, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC, owns 91,900 shares of Ultra Clean Holdings, Inc. (UCTT), valued at approximately $13.1 M.
As of the Q2 2026 filing, Ultra Clean Holdings, Inc. (UCTT) represents approximately 0.02% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Ultra Clean Holdings, Inc. (UCTT) was 763,500 shares, as reported at the end of Q4 2016.