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UCTT in the 13F filings

Ultra Clean HLDGS Inc · CUSIP 90385V107

Sector · SemiconductorsTheme · AI infrastructure and semiconductors· L3VLUP-definedTheme · Semiconductors
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
27
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 2 listed it in both
Shares listed
6,089,017
combined, among listed positions
Reported value
$377m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 19 buyers (opened or added shares) and 11 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -487,488.

Managers listing UCTT in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

27 of 27 holders

ActionFiling
Invesco Ltd1,659,949$103munder 0.1%Trimmed-1,739,88512 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,183,257$74munder 0.1%Added+231,10315 May 2026 (the filing on sec.gov)
Millennium Management LLC685,436$43munder 0.1%Added+125,48115 May 2026 (the filing on sec.gov)
Two Sigma Investments LP581,131$36munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC434,100$27munder 0.1%Added+23,53114 May 2026 (the filing on sec.gov)
Jane Street Group LLC309,703$19munder 0.1%Added+208,14912 May 2026 (the filing on sec.gov)
Marshall Wace LLP259,852$16munder 0.1%Added+146,37615 May 2026 (the filing on sec.gov)
AQR Capital Management LLC178,782$11munder 0.1%Trimmed-39,88115 May 2026 (the filing on sec.gov)
Citadel Advisors LLC139,223$8.7munder 0.1%Added+107,90415 May 2026 (the filing on sec.gov)
Winton Group Ltd104,240$6.5m0.23%Added+16,73012 May 2026 (the filing on sec.gov)
Walleye Capital LLC87,453$5.4munder 0.1%Added+65,20613 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP56,429$3.5munder 0.1%Newnew14 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc52,085$3.2munder 0.1%Added+8,99615 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP52,062$3.2munder 0.1%Added+18,13214 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC41,192$2.6munder 0.1%Newnew13 May 2026 (the filing on sec.gov)
Tudor Investment Corp37,569$2.3munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP35,645$2.2munder 0.1%Added+13,58615 May 2026 (the filing on sec.gov)
Caxton Associates LLP23,977$1.5munder 0.1%Added+5,92214 May 2026 (the filing on sec.gov)
AllianceBernstein LP57,182$1.4munder 0.1%Trimmed-4,05315 May 2026 (the filing on sec.gov)
Man Group PLC22,563$1.4munder 0.1%Trimmed-110,17815 May 2026 (the filing on sec.gov)
Maverick Capital Ltd20,309$1.3munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd19,373$1.2munder 0.1%Trimmed-4,30018 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)13,919$865kunder 0.1%Added+61915 May 2026 (the filing on sec.gov)
Voloridge Investment Management LLC11,760$731kunder 0.1%Trimmed-153,80515 May 2026 (the filing on sec.gov)
Quantbot Technologies LP8,643$537kunder 0.1%Trimmed-15,01513 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (6)

Exited (3)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
3 in Q3 2024 to 11 in Q2 2026

Tracked managers listing it, at least.

05101520142017201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
UCTT by quarter
QuarterHoldersReported valueBuyersSellers
Q1 20141$166kn.a.n.a.
Q4 20151$384kn.a.n.a.
Q4 20161$327kn.a.n.a.
Q1 20174$5.6mn.a.n.a.
Q2 20175$7.4mn.a.n.a.
Q3 20175$47mn.a.n.a.
Q4 20175$39mn.a.n.a.
Q1 20181$480kn.a.n.a.
Q2 20181$596kn.a.n.a.
Q3 20182$1.8mn.a.n.a.
Q4 20181$334kn.a.n.a.
Q1 20191$467kn.a.n.a.
Q2 20191$428kn.a.n.a.
Q3 20192$1.7mn.a.n.a.
Q4 20194$17mn.a.n.a.
Q1 20203$4.2mn.a.n.a.
Q2 20201$376kn.a.n.a.
Q3 20201$370kn.a.n.a.
Q4 20201$1.2mn.a.n.a.
Q1 20212$7.5mn.a.n.a.
Q2 20213$8.0mn.a.n.a.
Q3 20211$329kn.a.n.a.
Q4 20211$637kn.a.n.a.
Q1 20222$4.7mn.a.n.a.
Q2 20222$5.8mn.a.n.a.
Q3 20221$3.4mn.a.n.a.
Q4 20221$5.3mn.a.n.a.
Q1 20233$38mn.a.n.a.
Q2 20233$42mn.a.n.a.
Q3 20233$37mn.a.n.a.
Q4 20233$50m21
Q1 20243$49m03
Q2 20242$18m11
Q3 20243$17m20
Q4 20241$14m10
Q1 20251$8.7m10
Q2 20251$8.1m01
Q3 20251$11m10
Q4 20252$13m187
Q1 20265$110m1911
Q2 202611$1.1bn1717

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

UCTT and NVDA →UCTT and AVGO →UCTT and MU →Choose a stock to compare with UCTT →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own UCTT, latest filings →Back to the 13F Explorer →