ULTRA CLEAN HOLDINGS INC (UCTT) Stock Institutional Trading Activity


ULTRA CLEAN HOLDINGS INC (UCTT) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, First Eagle U.S. Value, and ARK Invest. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2022Renaissance Technologies LLCBuy19,000116,900$4,955
Q4 2021First Eagle U.S. ValueBuy3,40011,114$637
Q4 2021Renaissance Technologies LLCSell-74,70097,900$5,616
Q3 2021First Eagle U.S. ValueBuy6,8007,714$329
Q3 2021Renaissance Technologies LLCBuy125,400172,600$7,353
Q2 2021First Eagle U.S. ValueBuy914914$49
Q2 2021Renaissance Technologies LLCSell-14,70047,200$2,536
Q2 2021ARK InvestSell-29,77489,874$4,828
Q1 2021ARK InvestBuy80,428119,648$6,944
Q4 2020Renaissance Technologies LLCBuy15,70061,900$1,928
Q4 2020ARK InvestBuy21,98939,220$1,222
Q3 2020ARK InvestBuy61917,231$370
Q2 2020Renaissance Technologies LLCSell-9,20046,200$1,046
Q2 2020ARK InvestBuy4,25816,612$376
Q1 2020Renaissance Technologies LLCBuy31,10055,400$765
Q1 2020ARK InvestSell-6,63212,354$170
Q4 2019ARK InvestSell-7,10818,986$446
Q3 2019Renaissance Technologies LLCSell-185,20024,300$356
Q3 2019ARK InvestSell-4,65626,094$382
Q2 2019Renaissance Technologies LLCSell-116,237209,500$2,916
Q2 2019ARK InvestSell-14,41530,750$428
Q1 2019Renaissance Technologies LLCSell-210,518325,737$3,371
Q1 2019ARK InvestBuy5,76545,165$467
Q4 2018Renaissance Technologies LLCBuy320,755536,255$4,542
Q4 2018ARK InvestBuy3,09039,400$334
Q3 2018Renaissance Technologies LLCSell-400215,500$2,705
Q3 2018ARK InvestBuy43636,310$456
Q2 2018ARK InvestBuy10,93935,874$596
Q1 2018ARK InvestBuy1,17724,935$480
Q4 2017ARK InvestSell-1,85323,758$549

Frequently asked questions about UCTT activity

  • Which institutional owners are buying UCTT?

    Institutional owners buying UCTT include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in UCTT activity?

    "Buy" means an investor increased their reported position in UCTT compared to the prior reporting period. This reflects growing exposure to ULTRA CLEAN HOLDINGS INC (UCTT) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in UCTT increasing?

    Institutional interest in UCTT can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.