Ultra Clean Holdings, Inc.
DE ˙ DB ˙ US90385V1070
76,52 € ↓ -4,30 (-5,32%)
2026-06-05
DEL PRIS
SecurityDE:UCE / Ultra Clean Holdings, Inc.
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership323,876 shares
Latest Disclosed Value $ 20,138,610
Bnp Paribas Arbitrage, Sa ownership in UCE / Ultra Clean Holdings, Inc.

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 323,876 shares of Ultra Clean Holdings, Inc. (DE:UCE) valued at $15,546,048 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 426,561 shares of Ultra Clean Holdings, Inc.. This represents a change in shares of -24.07% during the quarter. The current value of the position is $24,782,992 USD.

Bnp Paribas Arbitrage, Sa has a history of taking positions in derivatives of the underlying security (UCE) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

DE:UCE / Ultra Clean Holdings, Inc. Historical Put/Call Ratio
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)
2026-05-12 2026-03-31 13F Ultra Clean Holdings Equity 90385V107 323,876 -102,685 -24.07 20,139 86.39 0.0010
2026-02-10 2025-12-31 13F Ultra Clean Holdings Equity 90385V107 426,561 31,856 8.07 10,805 0.46 0.0049
2025-11-13 2025-09-30 13F Ultra Clean Holdings Equity 90385V107 394,705 122,862 45.20 10,756 75.31 0.0057
2025-08-14 2025-06-30 13F Ultra Clean Holdings Equity 90385V107 271,843 212,791 360.35 6,135 385.36 0.0035
2025-05-14 2025-03-31 13F Ultra Clean Holdings Equity 90385V107 59,052 32,381 121.41 1,264 31.94 0.0007
2025-02-14 2024-12-31 13F Ultra Clean Holdings Equity 90385V107 26,671 -39,511 -59.70 959 -63.74 0.0005
2024-11-13 2024-09-30 13F Ultra Clean Holdings Equity 90385V107 66,182 34,645 109.86 2,643 71.00 0.0018
2024-08-13 2024-06-30 13F Ultra Clean Holdings Equity 90385V107 31,537 1,858 6.26 1,545 13.35 0.0013
2024-05-01 2024-03-31 13F Ultra Clean Holdings Equity 90385V107 29,679 7,233 32.22 1,363 77.94 0.0012
2024-02-14 2023-12-31 13F/A-2 Ultra Clean Holdings Equity 90385V107 22,446 -20,786 -48.08 766 -40.25 0.0009
2024-02-07 2023-12-31 13F/A-1 Ultra Clean Holdings Equity 90385V107 22,446 -20,786 766 0.0001
2024-02-07 2023-12-31 13F Ultra Clean Holdings Equity 90385V107 22,446 766
2023-11-14 2023-09-30 13F Ultra Clean Holdings Equity 90385V107 43,232 19,707 83.77 1,283 41.81 0.0016
2023-08-09 2023-06-30 13F Ultra Clean Holdings Equity 90385V107 23,525 -23,574 -50.05 905 -42.09 0.0011
2023-05-12 2023-03-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 47,099 31,481 201.57 1,562 201.93 0.0022
2023-02-14 2022-12-31 13F Ultra Clean Holdings Equity 90385V107 15,618 -7,561 -32.62 518 -13.26 0.0008
2022-11-16 2022-09-30 13F/A-1 Ultra Clean Holdings Equity 90385V107 23,179 8,483 57.72 597 36.38 0.0010
2022-11-15 2022-09-30 13F Ultra Clean Holdings Equity 90385V107 23,179 8,483 597 0.0001
2022-08-12 2022-06-30 13F Ultra Clean Holdings Equity 90385V107 14,696 -109 -0.74 438 -30.30 0.0007
2022-05-18 2022-03-31 13F/A-1 Ultra Clean Holdings Equity 90385V107 14,805 -6,971 -32.01 628 -49.80 0.0008
2022-02-09 2021-12-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 21,776 -22,633 -50.96 1,249 -33.95 0.0018
2021-11-16 2021-09-30 13F/A-1 ULTRA CLEAN HOLDINGS EQUITY 90385V107 44,409 28,911 186.55 1,892 127.28 0.0027
2021-11-12 2021-09-30 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 10,366 -5,132 222 0.0000
2021-08-10 2021-06-30 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 15,498 6,721 76.58 833 63.46 0.0011
2021-05-07 2021-03-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 8,777 -920 -9.49 509 68.54 0.0007
2021-02-10 2020-12-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 9,697 -669 -6.45 302 36.04 0.0006
2020-10-30 2020-09-30 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 10,366 3,511 51.22 222 43.23 0.0003
2020-08-06 2020-06-30 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 6,855 -74,511 -91.58 155 -86.19 0.0003
2020-05-13 2020-03-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 81,366 -23,158 -22.16 1,123 -54.26 0.0023
2020-02-12 2019-12-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 104,524 98,400 1,606.79 2,453 2,656.18 0.0045
2019-11-07 2019-09-30 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 6,124 -151 -2.41 90 2.30 0.0002
2019-07-30 2019-06-30 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 6,275 -1,711 -21.42 87 6.10 0.0002
2019-04-25 2019-03-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 7,986 6,537 451.14 83 583.33 0.0002
2019-02-12 2018-12-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 1,449 216 17.52 12 -20.00 0.0000
2018-11-07 2018-09-30 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 1,233 0 0.00 15 -25.00 0.0000
2018-07-25 2018-06-30 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 1,233 -13,527 -91.65 20 -92.96 0.0000
2018-05-11 2018-03-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 14,760 6,474 78.13 284 48.69 0.0005
2018-03-05 2017-12-31 13F/A-1 ULTRA CLEAN HOLDINGS EQUITY 90385V107 8,286 -29,187 -77.89 191 -83.35 0.0003
2018-02-01 2017-12-31 13F ULTRA CLEAN HOLDINGS EQUITY 90385V107 8,286 -29,187 191
2017-11-03 2017-09-30 13F ULTRA CLEAN HLDGS STOCK 90385V107 37,473 -47,289 -55.79 1,147 -27.82 0.0028
2017-08-03 2017-06-30 13F ULTRA CLEAN HLDGS STOCK 90385V107 84,762 84,173 14,290.83 1,589 17,555.56 0.0048
2017-05-03 2017-03-31 13F ULTRA CLEAN HLDGS STOCK 90385V107 589 -1,253 -68.02 10 -47.06 0.0000
2017-02-14 2016-12-31 13F ULTRA CLEAN HLDGS STOCK 90385V107 1,842 -536 -22.54 18 0.00 0.0001
2016-10-05 2016-09-30 13F * ULTRA CLEAN HLDGS INC COM STOCK 90385V107 2,378 1,126 89.94 18 142.86 0.0001
2016-07-06 2016-06-30 13F * ULTRA CLEAN HLDGS INC COM STOCK 90385V107 1,252 1,082 636.47 7 682.00 0.0000
2016-04-22 2016-03-31 13F * ULTRA CLEAN HLDGS INC COM STOCK 90385V107 170 -2,826 -94.33 1 -100.00 0.0000
2016-04-19 2015-12-31 13F/A-1 * ULTRA CLEAN HLDGS INC COM STOCK 90385V107 2,996 -3,540 -54.16 15 -59.46 0.0001
2016-02-10 2015-12-31 13F * ULTRA CLEAN HLDGS INC COM STOCK 90385V107 2,996 15
2015-11-13 2015-09-30 13F * ULTRA CLEAN HLDGS INC COM STOCK 90385V107 6,536 3,906 148.52 38 131.25 0.0001
2015-08-14 2015-06-30 13F ULTRA CLEAN HLDGS INC COM STOCK 90385V107 2,630 1,950 286.76 16 300.00 0.0000
2015-05-15 2015-03-31 13F * ULTRA CLEAN HLDGS INC COM STOCK 90385V107 680 680 0.00 5 0.0000
2015-02-11 2014-12-31 13F * ULTRA CLEAN HLDGS INC COM STOCK 90385V107 0 -2,019 -100.00 0 -100.00
2014-11-12 2014-09-30 13F * ULTRA CLEAN HLDGS INC COM STOCK 90385V107 2,019 1,709 551.29 18 500.00 0.0000
2014-04-02 2013-12-31 13F/A-1 ULTRA CLEAN HLDGS STOCK 90385V107 310 310 3 0.0000
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2017-11-03 2017-09-30 13F ULTRA CLEAN HLDGS OPTION Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-08-03 2017-06-30 13F ULTRA CLEAN HLDGS OPTION Call 250 3 n/a n/a n/a
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.