Ultra Clean Holdings, Inc.
DE ˙ DB ˙ US90385V1070
76,52 € ↓ -4,30 (-5,32%)
2026-06-05
DEL PRIS
SecurityDE:UCE / Ultra Clean Holdings, Inc.
InstitutionAssenagon Asset Management S.A.
Latest Disclosed Ownership141,434 shares
Latest Disclosed Value $ 8,794,366
Assenagon Asset Management S.A. reports 58.52% increase in ownership of UCE / Ultra Clean Holdings, Inc.

On April 20, 2026 - Assenagon Asset Management S.A. filed a 13F-HR form disclosing ownership of 141,434 shares of Ultra Clean Holdings, Inc. (DE:UCE) valued at $6,788,832 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 89,220 shares of Ultra Clean Holdings, Inc.. This represents a change in shares of 58.52% during the quarter. The current value of the position is $10,822,530 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)
2026-04-20 2026-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 141,434 52,214 58.52 8,794 289.29 0.0134
2026-01-09 2025-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 89,220 0 0.00 2,260 -7.08 0.0031
2025-10-07 2025-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 89,220 -1,338 -1.48 2,431 18.99 0.0033
2025-07-11 2025-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 90,558 -71,924 -44.27 2,044 -41.26 0.0030
2025-04-15 2025-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 162,482 -53,711 -24.84 3,479 -55.25 0.0058
2025-01-14 2024-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 216,193 -118,903 -35.48 7,772 -41.91 0.0125
2024-10-23 2024-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 335,096 274,628 454.17 13,380 351.72 0.0246
2024-07-18 2024-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 60,468 0 0.00 2,963 6.66 0.0066
2024-04-24 2024-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 60,468 -61,058 -50.24 2,778 -33.05 0.0066
2024-01-17 2023-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 121,526 24,670 25.47 4,149 44.38 0.0110
2023-11-06 2023-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 96,856 96,856 2,874 0.0089
2023-07-25 2023-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 0 -32,768 -100.00 0 -100.00
2023-04-18 2023-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 32,768 0 0.00 1,087 108,500.00 0.0039
2023-01-12 2022-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 32,768 -10,601 -24.44 1 -99.91 0.0039
2022-10-27 2022-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 43,369 -39 -0.09 1,117 -13.54 0.0043
2022-07-27 2022-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 43,408 -26,607 -38.00 1,292 -56.47 0.0048
2022-04-25 2022-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 70,015 -14,829 -17.48 2,968 -39.02 0.0082
2022-02-01 2021-12-31 13F ULTRA CLEAN HLDGS COM 90385V107 84,844 38,359 82.52 4,867 145.81 0.0141
2021-10-19 2021-09-30 13F ULTRA CLEAN HLDGS COM 90385V107 46,485 -7,149 -13.33 1,980 -31.27 0.0063
2021-07-15 2021-06-30 13F ULTRA CLEAN HLDGS COM 90385V107 53,634 41,644 347.32 2,881 313.94 0.0098
2021-04-26 2021-03-31 13F ULTRA CLEAN HLDGS COM 90385V107 11,990 11,990 696 0.0028
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.