Ultra Clean Holdings, Inc.
US ˙ NasdaqGS ˙ US90385V1070

SecurityUCTT / Ultra Clean Holdings, Inc.
InstitutionFox Run Management, L.l.c.
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Fox Run Management, L.l.c. closes position in UCTT / Ultra Clean Holdings, Inc.

On November 12, 2025 - Fox Run Management, L.l.c. filed a 13F-HR form disclosing ownership of 0 shares of Ultra Clean Holdings, Inc. (US:UCTT) valued at $0 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 6, 2025 disclosing 27,926 shares of Ultra Clean Holdings, Inc.. The current value of the position is $0 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2025-11-12 2025-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 0 -100.00 0
2025-08-06 2025-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 27,926 27,926 630 0.1050
2025-05-13 2025-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 0 -29,126 -100.00 0 -100.00
2025-02-11 2024-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 29,126 -2,358 -7.49 1,047 -16.71 0.1901
2024-11-12 2024-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 31,484 31,484 1,257 0.2798
2022-11-07 2022-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 0 -7,360 -100.00 0 -100.00
2022-08-12 2022-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 7,360 7,360 219 0.1093
2022-05-10 2022-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 0 -7,797 -100.00 0 -100.00
2022-02-09 2021-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 7,797 7,797 447 0.2634
2020-10-29 2020-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 0 -11,050 -100.00 0 -100.00
2020-07-31 2020-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 11,050 11,050 250 0.3308
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.