Ultra Clean Holdings, Inc.
DE ˙ DB ˙ US90385V1070
76,52 € ↓ -4,30 (-5,32%)
2026-06-05
DEL PRIS
SecurityDE:UCE / Ultra Clean Holdings, Inc.
InstitutionBoothbay Fund Management, Llc
Latest Disclosed Ownership44,584 shares
Latest Disclosed Value $ 2,772,233
Boothbay Fund Management, Llc ownership in UCE / Ultra Clean Holdings, Inc.

On May 15, 2026 - Boothbay Fund Management, Llc filed a 13F-HR form disclosing ownership of 44,584 shares of Ultra Clean Holdings, Inc. (DE:UCE) valued at $2,140,032 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 shares of Ultra Clean Holdings, Inc.. The current value of the position is $3,411,568 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)
2026-05-15 2026-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 44,584 44,584 2,772 0.0359
2026-02-17 2025-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 0 -19,099 -100.00 0 -100.00
2025-11-14 2025-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 19,099 19,099 520 0.0076
2024-05-15 2024-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 0 -21,279 -100.00 0 -100.00
2024-02-14 2023-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 21,279 21,279 726 0.0185
2022-11-14 2022-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 0 -18,492 -100.00 0 -100.00
2022-08-15 2022-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 18,492 18,492 551 0.0145
2021-11-15 2021-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 0 -4,562 -100.00 0 -100.00
2021-08-17 2021-06-30 13F/A-1 ULTRA CLEAN HLDGS COM 90385V107 4,562 4,562 245 0.0079
2021-08-16 2021-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 4,562 4,562 245 0.0077
2019-08-14 2019-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 0 -15,814 -100.00 0 -100.00
2019-05-15 2019-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 15,814 15,814 164 0.0159
2019-02-14 2018-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 0 -15,628 -100.00 0 -100.00
2018-11-14 2018-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 15,628 15,628 196 0.0194
2017-02-16 2016-12-31 13F/A-1 Ultra Clean Holdings EQUITIES 90385V107 0 -12,950 -100.00 0 -100.00 0.0000
2016-11-14 2016-09-30 13F Ultra Clean Holdings EQUITIES 90385V107 12,950 12,950 0 0.0299
2017-07-18 2016-03-31 13F/A-3 ULTRA CLEAN HLDGS COM 90385V107 0 -12,356 -100.00 0 -100.00
2017-07-18 2015-12-31 13F/A-3 ULTRA CLEAN HLDGS COM 90385V107 12,356 -7,545 -37.91 63 -44.74 0.0355
2016-06-09 2015-12-31 13F/A-1 ULTRA CLEAN HLDGS COM 90385V107 12,356 0 63 0.0436
2016-02-16 2015-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 12,356 63
2016-06-09 2015-09-30 13F/A-1 ULTRA CLEAN HLDGS COM 90385V107 19,901 19,901 114 0.1063
2015-11-16 2015-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 19,901 114 0.0643
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.